diff options
Diffstat (limited to 'libibex')
| -rw-r--r-- | libibex/.cvsignore | 10 | ||||
| -rw-r--r-- | libibex/COPYING.LIB | 481 | ||||
| -rw-r--r-- | libibex/ChangeLog | 312 | ||||
| -rw-r--r-- | libibex/Makefile.am | 36 | ||||
| -rw-r--r-- | libibex/TODO | 61 | ||||
| -rw-r--r-- | libibex/block.c | 595 | ||||
| -rw-r--r-- | libibex/block.h | 114 | ||||
| -rw-r--r-- | libibex/diskarray.c | 255 | ||||
| -rw-r--r-- | libibex/disktail.c | 814 | ||||
| -rw-r--r-- | libibex/dumpindex.c | 59 | ||||
| -rw-r--r-- | libibex/hash.c | 859 | ||||
| -rw-r--r-- | libibex/ibex.h | 106 | ||||
| -rw-r--r-- | libibex/ibex_block.c | 313 | ||||
| -rw-r--r-- | libibex/ibex_db.c | 512 | ||||
| -rw-r--r-- | libibex/ibex_internal.h | 32 | ||||
| -rw-r--r-- | libibex/index.h | 103 | ||||
| -rw-r--r-- | libibex/lookup.c | 83 | ||||
| -rw-r--r-- | libibex/mkindex.c | 84 | ||||
| -rw-r--r-- | libibex/wordindex.c | 646 | ||||
| -rw-r--r-- | libibex/wordindex.h | 72 | ||||
| -rw-r--r-- | libibex/wordindexmem.c | 721 |
21 files changed, 0 insertions, 6268 deletions
diff --git a/libibex/.cvsignore b/libibex/.cvsignore deleted file mode 100644 index 0623d39af7..0000000000 --- a/libibex/.cvsignore +++ /dev/null @@ -1,10 +0,0 @@ -.deps -Makefile -Makefile.in -.libs -.deps -*.lo -*.la -lookup -mkindex -dumpindex
\ No newline at end of file diff --git a/libibex/COPYING.LIB b/libibex/COPYING.LIB deleted file mode 100644 index eb685a5ec9..0000000000 --- a/libibex/COPYING.LIB +++ /dev/null @@ -1,481 +0,0 @@ - GNU LIBRARY GENERAL PUBLIC LICENSE - Version 2, June 1991 - - Copyright (C) 1991 Free Software Foundation, Inc. - 675 Mass Ave, Cambridge, MA 02139, USA - Everyone is permitted to copy and distribute verbatim copies - of this license document, but changing it is not allowed. - -[This is the first released version of the library GPL. It is - numbered 2 because it goes with version 2 of the ordinary GPL.] - - Preamble - - The licenses for most software are designed to take away your -freedom to share and change it. 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This time - I did change the index format. - (IBEX_VERSION): moved into block.h - - * hash.c (struct _hashroot): Add a linked list of keys to the table. - (struct _hashblock): Added a next pointer as a block number. - (hash_insert): Link new key blocks into the key block list. - (struct _HASHCursor): Renamed block to key and added a block item. - (hash_cursor_next): Changed to go through the linked list of all - hash items rather than through each hash chain separately. >> - faster. - (ibex_hash_dump_rec): Remove a warning. - -2000-10-25 <jpr@helixcode.com> - - * ibex_block.c: No longer include <db.h> - -2000-10-25 Not Zed <NotZed@HelixCode.com> - - * ibex_internal.h (IBEX_VERSION): Bumped to another version. The - file format hasn't changed, but earlier bugs may create invalid - files. - - * block.c (ibex_block_read): Use the root data directly. - (ibex_block_cache_open): As well. - (ibex_block_get): And here too. - (ibex_block_cache_sync): Sync the root block directly here. - - * block.h: Pad root block out to 1024 bytes. - Added root block to struct _memcache. - - * disktail.c (tail_get): Dirty the root block. - (tail_get): Fix for changes to root access. - (disk_remove): And here too. - - * wordindexmem.c (sync_cache_entry): Handle the case of not having - any files in the list, which can happen now. - (word_index_pre): Make sure we set the wordid on the new cache - entry. - - * ibex_block.c (ibex_save): Sigh. Pass the right argument to - index_post. - -2000-10-24 JP Rosevear <jpr@helixcode.com> - - * .cvsignore: Shush - -2000-10-24 Not Zed <NotZed@HelixCode.com> - - * block.c (ibex_block_cache_open): Create a word_index_mem for - indexing the words, rather than a word_index. - - * ibex_block.c (ibex_index_buffer): If we haven't called index_pre - yet, do it before indexing anything. - (ibex_save): If wehave called index_pre previously, call - index_post. - (ibex_close): And same for here. - - * index.h: Added a cursor class, and cursor retrieval function for - iterating through an index's keys. - - * wordindexmem.c (ibex_create_word_index_mem): New word class, - similar to wordindex, but meant to be faster for updates. - (word_index_pre): Implement. We load all keys into memory. - (word_index_post): Implement. We sync and free all keys. - (find): Remove lru code, its no longer a cache, but a lookup - table. - (add_index_cache): Remove lru code here too. - (find_name): And here. - (word_flush): Flush the hashtable direct. - (word_close): Call flush to flush, rather than doing it ourselves. - (add_index_cache): If we are in an index state, we can assume a - cache miss == a new word. - (word_index_post): Maintain whether or not we are in an index - state, and the depth of the state. - (word_index_pre): Likewise. Dont reread the index if we have - already. - (cache_sanity): Fixed for struct changes. - - * wordindex.h (IBEXWordClass): Added functions to prepare/cleanup - for lots of indexing. i.e. can be used to optimise indexing speed - at the cost of extra memory usage during the indexing process. - - * dumpindex.c: Dumps the contents of indexs. - - * hash.c (ibex_hash_dump_rec): Also print the word count. - (hash_cursor_create): Create a new cursor for iterating through a - hashtable. - (hash_cursor_close): 'close' the cursor. It is upto the - application to close any cursors it creates. - (hash_cursor_next): Goto the next key id. - (hash_cursor_next_key): Goto the next key, reutrn the key. - (hash_get_cursor): Return a cursor object. - - * wordindex.c (unindex_name): Cross-check the cache as well. - (word_index_post): - (word_index_pre): Added (empty) callbacks for pre/post functions. - -2000-10-12 Not Zed <NotZed@HelixCode.com> - - * ibex_internal.h (struct ibex): Bumped ibex rev. - - * block.c (ibex_block_cache_open): Bumped the ibex file revision - because of the hash table size change. - - * index.h: Added some stat stuff. - - * wordindex.c (struct _wordcache): Changed files[] to be a pointer - to an allocated block/or an individual item. - (find): Fix for changes to struct. - (find_name): " - (sync_cache_entry): " - (add): " - (add_list): " - (add_index_cache): Free the cache file array if it was created. - (word_flush): And here. - (word_close): And here too. - (ibex_create_word_index): Double the size of the hashtables. - (word_flush): Make sure we reset the wordcount to 0 if we remove - the list items. DOH. - (add_index_cache): Use a slightly more sohpisticated aging - algorithm to remove expired nodes. - -2000-10-10 Not Zed <NotZed@HelixCode.com> - - * hash.c (hash_find): - (hash_remove): - (hash_insert): Truncate key if it is too big to fit in a - single block to MAX_KEYLEN bytes. - -2000-09-28 Not Zed <NotZed@HelixCode.com> - - * block.c (ibex_block_free): Make sure we map the 'free' block to - a block number when unlinking a block (fixes a lot of assertion - failures). - (ibex_block_cache_open): Initialise sync flag on root block. If - it is not set on open then the index could be in an invalid state, - and should be rescanned. - (ibex_block_cache_sync): Sync root block last, and set the sync - flag. - (ibex_block_cache_open): Mirror root block flags in block_cache - struct. - (ibex_block_cache_sync): Likewise. - (ibex_block_read): If we write a dirty block, then we clear the - sync flag if its still set; we are no longer synced. - -2000-09-19 Not Zed <NotZed@HelixCode.com> - - ** Merged from IBEX_DISK branch to head. - - * file.c: - * find.c: - * words.c: - * index.c: Removed unused files. - - * block.h: Changed block to use only 24 bits for next and 8 for - used, and fixed all relevant code. Some cleanup. - - * disktail.c (tail_get): If we use an empty tail node, then make - sure we make it dirty. - -2000-09-15 Not Zed <NotZed@HelixCode.com> - - * wordindex.c (word_close): Free hashtable on exit too. - - * disktail.c: Implemented tail-node storage for the end of long - lists, or for short lists. Should save significant disk space - (5x?). - Implemented special case for 1-item lists, where the tailnode - pointer is used to store the index entry. - -2000-09-14 Not Zed <NotZed@HelixCode.com> - - * wordindex.c (add_index_key): Keys also handle tails. - - * hash.c (hash_set_data_block): Added new parameter to keys - a - tail block (a full 32 bit block pointer). - (hash_get_data_block): And same here. - -2000-09-12 Not Zed <NotZed@HelixCode.com> - - * wordindex.c (word_close): Dont close namestore twice. - -2000-09-11 Not Zed <NotZed@HelixCode.com> - - ** Redid almost everything, on-disk hash table to store an index - to index records, mroe on the way to modularisation (more to go), - now stores reverse indexes for deleting. - -2000-08-31 Not Zed <NotZed@HelixCode.com> - - * block.c (add_key_mem): Initialise a memory based array for newly - added index entries. - (add_record): Changed to cache updates in memory until we hit a - limit, and then flush them to disk. - (get_record): Merge in-memory records with disk records. - (remove_record): Remove from memory first, and if that fails, goto - disk. - (find_record): Check memory first, then disk if that fails. - (add_datum_list): oops, copy size * sizeof(blockid_t) - (add_indexed): Make sure we link in the head node when we create a - new one. - -2000-08-09 Christopher James Lahey <clahey@helixcode.com> - - * file.c, find.c: Fixed some warnings. - -2000-05-11 NotZed <NotZed@HelixCode.com> - - * index.c (ibex_unindex): Make sure we mark the ibex as dirty. - -2000-05-07 NotZed <NotZed@HelixCode.com> - - * file.c (ibex_save): New function, only write out the ibex if it - has changed. - -2000-05-07 <notzed@helixcode.com> - - * file.c (ibex_open): Also close the fd after we're done. - - * find.c (ibex_contains_name): New function to find out if a file - is indexed. - -2000-05-02 Matt Loper <matt@helixcode.com> - - * Makefile.am: set G_LOG_DOMAIN. - -2000-04-12 NotZed <NotZed@HelixCode.com> - - * find.c (ibex_dump_all): Debug function to dump the whole index - to stdout. - - * words.c (get_ibex_file): Use g_strdup(), not strdup(). - -2000-04-11 NotZed <NotZed@HelixCode.com> - - * file.c (write_word): Always write out all words we have (even if - its 0 ... the file expects it). No longer check for removed files. - (store_word): Check for removed files here, and only add to the - ordered tree if we have references left to this word. - (ibex_write): First insert into the tree, to determine the - wordcount to be saved in the output file, and then write that. - (ibex_open): Remove some debug. - - * words.c (ibex_index_buffer): Always set 'unread', if it is a - valid pointer (dont rely on caller to initialise it). - -2000-03-26 NotZed <NotZed@HelixCode.com> - - * lookup.c (main): Fixed call to ibex_open. - - * mkindex.c (main): Fixed call to ibex_open. - - * file.c (ibex_open): Changed to accept flags and mode equivalent - to open(2). - -2000-02-25 Dan Winship <danw@helixcode.com> - - * *.c: add gtk-doc-style comments - -2000-02-21 Matt Loper <matt@helixcode.com> - - * .cvsignore: Added mkindex. - -2000-02-21 NotZed <NotZed@HelixCode.com> - - * Makefile.am: change noinst_LIBRARIES to noinst_LTLIBRARIES, and - supply -static to LDFLAGS. Duh, and changed LDADD back to - libibex.la. - -2000-02-20 Matt Loper <matt@helixcode.com> - - * Makefile.am: changed mkindex_LDADD to libibex.a instead of - libibex.la. - -2000-02-19 Matt Loper <matt@helixcode.com> - - * .cvsignore: added lookup. - -2000-02-18 Miguel de Icaza <miguel@nuclecu.unam.mx> - - * Makefile.am (lookup_LDADD): For now. make a libibex.a library so - we can link it with the camel provider. I hate libtool - -2000-02-16 Dan Winship <danw@helixcode.com> - - * Makefile.am: automakify - -2000-02-16 NotZed <NotZed@HelixCode.com> - - * find.[ch] (ibex_find_name): Finds if a word is indexed under a - given name. - -2000-02-14 NotZed <notzed@zedzone.helixcode.com> - - * Makefile: Hack together a build using libtool. This should all - be auto*'d at some point I guess. - -2000-02-13 NotZed <notzed@zedzone.helixcode.com> - - * Added ChangeLog file. - diff --git a/libibex/Makefile.am b/libibex/Makefile.am deleted file mode 100644 index 6cc88186d6..0000000000 --- a/libibex/Makefile.am +++ /dev/null @@ -1,36 +0,0 @@ -## Process this file with automake to produce Makefile.in - -noinst_LTLIBRARIES = libibex.la - -libibex_la_SOURCES = \ - wordindex.c wordindexmem.c \ - block.c ibex.h \ - hash.c \ - disktail.c \ - ibex_block.c - -libibex_la_LDFLAGS = -static - -noinst_HEADERS = \ - ibex_internal.h \ - block.h \ - wordindex.h \ - index.h - -INCLUDES = -I$(srcdir) $(GLIB_CFLAGS) $(UNICODE_CFLAGS) \ - -DG_LOG_DOMAIN=\"libibex\" - - -noinst_PROGRAMS = dumpindex - -dumpindex_SOURCES = dumpindex.c -dumpindex_LDADD = libibex.la $(GLIB_LIBS) $(UNICODE_LIBS) - -#noinst_PROGRAMS = mkindex lookup -# -#mkindex_SOURCES = mkindex.c -#mkindex_LDADD = libibex.la $(GLIB_LIBS) $(UNICODE_LIBS) -# -#lookup_SOURCES = lookup.c -#lookup_LDADD = libibex.la $(GLIB_LIBS) $(UNICODE_LIBS) - diff --git a/libibex/TODO b/libibex/TODO deleted file mode 100644 index a087c8d1f3..0000000000 --- a/libibex/TODO +++ /dev/null @@ -1,61 +0,0 @@ -Stability ---------- -* ibex_open should never crash, and should never return NULL without -errno being set. Should check for errors when reading. - - -Performance ------------ -* Profiling, keep thinking about data structures, etc. - -* Check memory usage - -* See if writing the "inverse image" of long ref streams helps -compression without hurting performance now. (ie, if a word appears in -more than half of the files, write out the list of files it _doesn't_ -appear in). (I tried this before, and it wasn't working well, but the -file format and data structures have changed a lot.) - -* We could save a noticeable chunk of time if normalize_word computed -the hash of the word and then we could pass that into -g_hash_table_insert somehow. - -* Make a copy of the buffer to be indexed (or provide interface for -caller to say ibex can munge the provided data) and then use that -rather than constantly copying things. ? - - -Functionality -------------- -* ibex file locking - -* specify file mode in ibex_open - -* ibex_find* need to normalize the search words... should this be done -by the caller or by ibex_find? - -* Needs to be some way to do a secondary search after getting results -back from ibex_find* (ie, for "foo near bar"). This either has to be -done by ibex, or requires us to export the normalize interface. - -* Does there need to be an ibex_find_any, or is that easy enough for the -caller to do? - -* utf8_trans needs to cover at least two more code pages. This is -tricky because it's not clear whether some of the letters there should -be translated to ASCII or left as UTF8. This requires some -investigation. - -* ibex_index_* need to ignore HTML tags. - NAME = [A-Za-z][A-Za-z0-9.-]* - </?{NAME}(\s*{NAME}(\s*=\s*({NAME}|"[^"]*"|'[^']*')))*> - <!(--([^-]*|-[^-])--\s*)*> - - ugh. ok, simplifying, we get: - <[^!](([^"'>]*("[^"]*"|'[^']*'))*> or - <!(--([^-]*|-[^-])--\s*)*> - - which is still not simple. sigh. - -* ibex_index_* need to recognize and ignore "non-text". Particularly -BinHex and uuencoding. diff --git a/libibex/block.c b/libibex/block.c deleted file mode 100644 index 3f637d4422..0000000000 --- a/libibex/block.c +++ /dev/null @@ -1,595 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- - * - * Copyright (C) 2000 Helix Code, Inc. - * - * Authors: Michael Zucchi <notzed@helixcode.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public License - * as published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with the Gnome Library; see the file COPYING.LIB. If not, - * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -/* - block file/cache/utility functions -*/ - -#include <stdio.h> - -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <unistd.h> -#include <errno.h> -#include <string.h> -#include <glib.h> - -#include "block.h" - -/*#define MALLOC_CHECK*/ - -#ifdef MALLOC_CHECK -#include <mcheck.h> -#endif - -#define d(x) -/*#define DEBUG*/ - -int block_log; - -#ifdef IBEX_STATS -static void -init_stats(struct _memcache *index) -{ - index->stats = g_hash_table_new(g_direct_hash, g_direct_equal); -} - -static void -dump_1_stat(int id, struct _stat_info *info, struct _memcache *index) -{ - printf("%d %d %d %d %d\n", id, info->read, info->write, info->cache_hit, info->cache_miss); -} - -static void -dump_stats(struct _memcache *index) -{ - printf("Block reads writes hits misses\n"); - g_hash_table_foreach(index->stats, dump_1_stat, index); -} - -static void -add_read(struct _memcache *index, int id) -{ - struct _stat_info *info; - - info = g_hash_table_lookup(index->stats, (void *)id); - if (info == NULL) { - info = g_malloc0(sizeof(*info)); - g_hash_table_insert(index->stats, (void *)id, info); - } - info->read++; -} - -static void -add_write(struct _memcache *index, int id) -{ - struct _stat_info *info; - - info = g_hash_table_lookup(index->stats, (void *)id); - if (info == NULL) { - info = g_malloc0(sizeof(*info)); - g_hash_table_insert(index->stats, (void *)id, info); - } - info->write++; -} - -static void -add_hit(struct _memcache *index, int id) -{ - struct _stat_info *info; - - info = g_hash_table_lookup(index->stats, (void *)id); - if (info == NULL) { - info = g_malloc0(sizeof(*info)); - g_hash_table_insert(index->stats, (void *)id, info); - } - info->cache_hit++; -} - -static void -add_miss(struct _memcache *index, int id) -{ - struct _stat_info *info; - - info = g_hash_table_lookup(index->stats, (void *)id); - if (info == NULL) { - info = g_malloc0(sizeof(*info)); - g_hash_table_insert(index->stats, (void *)id, info); - } - info->cache_miss++; -} -#endif /* IBEX_STATS */ - -#ifdef MALLOC_CHECK -static void -checkmem(void *p) -{ - if (p) { - int status = mprobe(p); - - switch (status) { - case MCHECK_HEAD: - printf("Memory underrun at %p\n", p); - abort(); - case MCHECK_TAIL: - printf("Memory overrun at %p\n", p); - abort(); - case MCHECK_FREE: - printf("Double free %p\n", p); - abort(); - } - } -} -#endif - -/* simple list routines (for simplified memory management of cache/lists) */ - -/** - * ibex_list_new: - * @v: - * - * Initialise a list header. A list header must always be initialised - * before use. - **/ -void ibex_list_new(struct _list *v) -{ - v->head = (struct _listnode *)&v->tail; - v->tail = 0; - v->tailpred = (struct _listnode *)&v->head; -} - -/** - * ibex_list_addhead: - * @l: List. - * @n: Node to append. - * - * Prepend a listnode to the head of the list @l. - * - * Return value: Always @n. - **/ -struct _listnode *ibex_list_addhead(struct _list *l, struct _listnode *n) -{ - n->next = l->head; - n->prev = (struct _listnode *)&l->head; - l->head->prev = n; - l->head = n; - return n; -} - -/** - * ibex_list_addtail: - * @l: - * @n: - * - * Append a listnode to the end of the list @l. - * - * Return value: Always the same as @n. - **/ -struct _listnode *ibex_list_addtail(struct _list *l, struct _listnode *n) -{ - n->next = (struct _listnode *)&l->tail; - n->prev = l->tailpred; - l->tailpred->next = n; - l->tailpred = n; - return n; -} - -/** - * ibex_list_remove: - * @n: The node to remove. - * - * Remove a listnode from a list. - * - * Return value: Always the same as @n. - **/ -struct _listnode *ibex_list_remove(struct _listnode *n) -{ - n->next->prev = n->prev; - n->prev->next = n->next; - return n; -} - -static struct _memblock * -memblock_addr(struct _block *block) -{ - return (struct _memblock *)(((char *)block) - G_STRUCT_OFFSET(struct _memblock, data)); -} - -/* read/sync the rootblock into the block_cache structure */ -static int -ibex_block_read_root(struct _memcache *block_cache) -{ - lseek(block_cache->fd, 0, SEEK_SET); - if (read(block_cache->fd, &block_cache->root, sizeof(block_cache->root)) != sizeof(block_cache->root)) { - - return -1; - } - return 0; -} - -static int -ibex_block_sync_root(struct _memcache *block_cache) -{ - lseek(block_cache->fd, 0, SEEK_SET); - if (write(block_cache->fd, &block_cache->root, sizeof(block_cache->root)) != sizeof(block_cache->root)) { - return -1; - } - return fsync(block_cache->fd); -} - - -/** - * ibex_block_dirty: - * @block: - * - * Dirty a block. This will cause it to be written to disk on - * a cache sync, or when the block is flushed from the cache. - **/ -void -ibex_block_dirty(struct _block *block) -{ - memblock_addr(block)->flags |= BLOCK_DIRTY; -} - -static void -sync_block(struct _memcache *block_cache, struct _memblock *memblock) -{ - if (block_log) - printf("writing block %d\n", memblock->block); - - lseek(block_cache->fd, memblock->block, SEEK_SET); - if (write(block_cache->fd, &memblock->data, sizeof(memblock->data)) != -1) { - memblock->flags &= ~BLOCK_DIRTY; - } -#ifdef IBEX_STATS - add_write(block_cache, memblock->block); -#endif -} - -/** - * ibex_block_cache_sync: - * @block_cache: - * - * Ensure the block cache is fully synced to disk. - **/ -void -ibex_block_cache_sync(struct _memcache *block_cache) -{ - struct _memblock *memblock; - - memblock = (struct _memblock *)block_cache->nodes.head; - while (memblock->next) { -#ifdef MALLOC_CHECK - checkmem(memblock); -#endif - if (memblock->flags & BLOCK_DIRTY) { - sync_block(block_cache, memblock); - } - memblock = memblock->next; - } - - block_cache->root.flags |= IBEX_ROOT_SYNCF; - if (ibex_block_sync_root(block_cache) != 0) { - block_cache->root.flags &= ~IBEX_ROOT_SYNCF; - } - -#ifdef IBEX_STATS - dump_stats(block_cache); -#endif - -} - -#ifdef MALLOC_CHECK -static void -check_cache(struct _memcache *block_cache) -{ - struct _memblock *mw, *mn; - - checkmem(block_cache); - checkmem(block_cache->index); - - mw = (struct _memblock *)block_cache->nodes.head; - mn = mw->next; - while (mn) { - checkmem(mw); - mw = mn; - mn = mn->next; - } -} -#endif - -/** - * ibex_block_cache_flush: - * @block_cache: - * - * Ensure the block cache is fully synced to disk, and then flush - * its contents from memory. - **/ -void -ibex_block_cache_flush(struct _memcache *block_cache) -{ - struct _memblock *mw, *mn; - - ibex_block_cache_sync(block_cache); - - mw = (struct _memblock *)block_cache->nodes.head; - mn = mw->next; - while (mn) { - g_hash_table_remove(block_cache->index, (void *)mw->block); - g_free(mw); - mw = mn; - mn = mn->next; - } - ibex_list_new(&block_cache->nodes); -} - -/** - * ibex_block_read: - * @block_cache: - * @blockid: - * - * Read the data of a block by blockid. The data contents is backed by - * the block cache, and should be considered static. - * - * TODO; should this return a NULL block on error? - * - * Return value: The address of the block data (which may be cached). - **/ -struct _block * -ibex_block_read(struct _memcache *block_cache, blockid_t blockid) -{ - struct _memblock *memblock; - -#ifdef MALLOC_CHECK - check_cache(block_cache); -#endif - - /* nothing can read the root block directly */ - g_assert(blockid != 0); - g_assert(blockid < block_cache->root.roof); - - memblock = g_hash_table_lookup(block_cache->index, (void *)blockid); - -#ifdef MALLOC_CHECK - check_cache(block_cache); -#endif - - if (memblock) { - d(printf("foudn blockid in cache %d = %p\n", blockid, &memblock->data)); - - /* 'access' page */ - ibex_list_remove((struct _listnode *)memblock); - ibex_list_addtail(&block_cache->nodes, (struct _listnode *)memblock); - -#ifdef MALLOC_CHECK - check_cache(block_cache); -#endif - -#ifdef IBEX_STATS - add_hit(block_cache, memblock->block); -#endif - -#ifdef MALLOC_CHECK - check_cache(block_cache); -#endif - - return &memblock->data; - } -#ifdef IBEX_STATS - add_miss(block_cache, blockid); - add_read(block_cache, blockid); -#endif - if (block_log) - printf("miss block %d\n", blockid); - - d(printf("loading blockid from disk %d\n", blockid)); - memblock = g_malloc(sizeof(*memblock)); - memblock->block = blockid; - memblock->flags = 0; - lseek(block_cache->fd, blockid, SEEK_SET); - memset(&memblock->data, 0, sizeof(memblock->data)); - read(block_cache->fd, &memblock->data, sizeof(memblock->data)); - - ibex_list_addtail(&block_cache->nodes, (struct _listnode *)memblock); - g_hash_table_insert(block_cache->index, (void *)blockid, memblock); - if (block_cache->count >= CACHE_SIZE) { - struct _memblock *old = (struct _memblock *)block_cache->nodes.head; - d(printf("discaring cache block %d\n", old->block)); - g_hash_table_remove(block_cache->index, (void *)old->block); - ibex_list_remove((struct _listnode *)old); - if (old->flags & BLOCK_DIRTY) { - /* are we about to un-sync the file? update root and sync it */ - if (block_cache->root.flags & IBEX_ROOT_SYNCF) { - printf("Unsyncing root block\n"); - - block_cache->root.flags &= ~IBEX_ROOT_SYNCF; - if (ibex_block_sync_root(block_cache) != 0) { - /* what do we do? i dont know! */ - g_warning("Could not sync root block of index: %s", strerror(errno)); - } - } - sync_block(block_cache, old); - } - g_free(old); - } else { - block_cache->count++; - } - - d(printf(" --- cached blocks : %d\n", block_cache->count)); - -#ifdef MALLOC_CHECK - check_cache(block_cache); -#endif - return &memblock->data; -} - -/** - * ibex_block_cache_open: - * @name: - * @flags: Flags as to open(2), should use O_RDWR and optionally O_CREAT. - * @mode: Mose as to open(2) - * - * Open a block file. - * - * FIXME; this currently also initialises the word and name indexes - * because their pointers are stored in the root block. Should be - * upto the caller to manage these pointers/data. - * - * Return value: NULL if the backing file could not be opened. - **/ -struct _memcache * -ibex_block_cache_open(const char *name, int flags, int mode) -{ - struct _memcache *block_cache = g_malloc0(sizeof(*block_cache)); - - d(printf("opening ibex file: %s", name)); - - /* setup cache */ - ibex_list_new(&block_cache->nodes); - block_cache->count = 0; - block_cache->index = g_hash_table_new(g_direct_hash, g_direct_equal); - block_cache->fd = open(name, flags, mode); - - if (block_cache->fd == -1) { - g_hash_table_destroy(block_cache->index); - g_free(block_cache); - return NULL; - } - - ibex_block_read_root(block_cache); - if (block_cache->root.roof == 0 - || memcmp(block_cache->root.version, IBEX_VERSION, 4) - || ((block_cache->root.flags & IBEX_ROOT_SYNCF) == 0)) { - (printf("Initialising superblock\n")); - /* reset root data */ - memcpy(block_cache->root.version, IBEX_VERSION, 4); - block_cache->root.roof = 1024; - block_cache->root.free = 0; - block_cache->root.words = 0; - block_cache->root.names = 0; - block_cache->root.tail = 0; /* list of tail blocks */ - block_cache->root.flags = 0; - ibex_block_sync_root(block_cache); - /* reset the file contents */ - ftruncate(block_cache->fd, 1024); - } else { - (printf("superblock already initialised:\n" - " roof = %d\n free = %d\n words = %d\n names = %d\n tail = %d\n", - block_cache->root.roof, block_cache->root.free, - block_cache->root.words, block_cache->root.names, block_cache->root.tail)); - } - /* FIXME: this should be moved higher up in the object tree */ - { - struct _IBEXWord *ibex_create_word_index_mem(struct _memcache *bc, blockid_t *wordroot, blockid_t *nameroot); - - block_cache->words = ibex_create_word_index_mem(block_cache, &block_cache->root.words,&block_cache->root.names); - } - -#ifdef IBEX_STATS - init_stats(block_cache); -#endif - - return block_cache; -} - -/** - * ibex_block_cache_close: - * @block_cache: - * - * Close the block file, sync any remaining cached data - * to disk, and free all resources. - **/ -void -ibex_block_cache_close(struct _memcache *block_cache) -{ - struct _memblock *mw, *mn; - - ibex_block_cache_sync(block_cache); - close(block_cache->fd); - - mw = (struct _memblock *)block_cache->nodes.head; - mn = mw->next; - while (mn) { - g_free(mw); - mw = mn; - mn = mw->next; - } - - g_hash_table_destroy(block_cache->index); - - g_free(block_cache); -} - -/** - * ibex_block_free: - * @block_cache: - * @blockid: - * - * Return a block to the free pool. - **/ -void -ibex_block_free(struct _memcache *block_cache, blockid_t blockid) -{ - struct _block *block = ibex_block_read(block_cache, blockid); - - block->next = block_number(block_cache->root.free); - block_cache->root.free = blockid; - ibex_block_dirty((struct _block *)block); -} - -/** - * ibex_block_get: - * @block_cache: - * - * Allocate a new block, or access a previously freed block and return - * its block id. The block will have zeroed contents. - * - * Return value: 0 if there are no blocks left (disk full/read only - * file, etc). - **/ -blockid_t -ibex_block_get(struct _memcache *block_cache) -{ - struct _block *block; - blockid_t head; - - if (block_cache->root.free) { - head = block_cache->root.free; - block = ibex_block_read(block_cache, head); - block_cache->root.free = block_location(block->next); - } else { - /* TODO: check the block will fit first */ - /* TODO: no need to read this block, can allocate it manually (saves a syscall/read) */ - head = block_cache->root.roof; - block_cache->root.roof += BLOCK_SIZE; - block = ibex_block_read(block_cache, head); - } - - g_assert(head != 0); - - d(printf("new block = %d\n", head)); - block->next = 0; - block->used = 0; - ibex_block_dirty(block); - return head; -} diff --git a/libibex/block.h b/libibex/block.h deleted file mode 100644 index dbc8fd5ad8..0000000000 --- a/libibex/block.h +++ /dev/null @@ -1,114 +0,0 @@ - -/* public interfaces for block io routines */ - -#ifndef _BLOCK_H -#define _BLOCK_H - -/*#define IBEX_STATS*/ /* define to get/dump block access stats */ - -#include <glib.h> - -/* version of file format */ -#define IBEX_VERSION "ibx6" - -typedef guint32 nameid_t; -typedef guint32 blockid_t; - -#define BLOCK_BITS (8) -#define BLOCK_SIZE (1<<BLOCK_BITS) -#define CACHE_SIZE 256 /* blocks in disk cache */ - -/* root block */ -struct _root { - char version[4]; - - blockid_t free; /* list of free blocks */ - blockid_t roof; /* top of allocated space, everything below is in a free or used list */ - blockid_t tail; /* list of 'tail' blocks */ - - blockid_t words; /* root of words index */ - blockid_t names; /* root of names index */ - - char flags; /* state flags */ - - /* makes structure fill up to 1024 bytes */ - char dummy[1024 - (sizeof(char)*5) - (sizeof(blockid_t)*5)]; -}; - -#define IBEX_ROOT_SYNCF (1<<0) /* file is synced */ - -/* basic disk structure for (data) blocks */ -struct _block { - unsigned int next:32-BLOCK_BITS; /* next block */ - unsigned int used:BLOCK_BITS; /* number of elements used */ - - nameid_t bl_data[(BLOCK_SIZE-4)/4]; /* references */ -}; - -/* custom list structure, for a simple/efficient cache */ -struct _listnode { - struct _listnode *next; - struct _listnode *prev; -}; -struct _list { - struct _listnode *head; - struct _listnode *tail; - struct _listnode *tailpred; -}; - -void ibex_list_new(struct _list *v); -struct _listnode *ibex_list_addhead(struct _list *l, struct _listnode *n); -struct _listnode *ibex_list_addtail(struct _list *l, struct _listnode *n); -struct _listnode *ibex_list_remove(struct _listnode *n); - -/* in-memory structure for block cache */ -struct _memblock { - struct _memblock *next; - struct _memblock *prev; - - blockid_t block; - int flags; - - struct _block data; -}; -#define BLOCK_DIRTY (1<<0) - -struct _memcache { - struct _list nodes; - int count; /* nodes in cache */ - - GHashTable *index; /* blockid->memblock mapping */ - int fd; /* file fd */ - -#ifdef IBEX_STATS - GHashTable *stats; -#endif - struct _root root; /* root block */ - - /* temporary here */ - struct _IBEXWord *words; /* word index */ -}; - -#ifdef IBEX_STATS -struct _stat_info { - int read; - int write; - int cache_hit; - int cache_miss; -}; -#endif /* IBEX_STATS */ - -struct _memcache *ibex_block_cache_open(const char *name, int flags, int mode); -void ibex_block_cache_close(struct _memcache *block_cache); -void ibex_block_cache_sync(struct _memcache *block_cache); -void ibex_block_cache_flush(struct _memcache *block_cache); - -blockid_t ibex_block_get(struct _memcache *block_cache); -void ibex_block_free(struct _memcache *block_cache, blockid_t blockid); -void ibex_block_dirty(struct _block *block); -struct _block *ibex_block_read(struct _memcache *block_cache, blockid_t blockid); - -#define block_number(x) ((x)>>BLOCK_BITS) -#define block_location(x) ((x)<<BLOCK_BITS) - -#endif /* ! _BLOCK_H */ diff --git a/libibex/diskarray.c b/libibex/diskarray.c deleted file mode 100644 index 2664e0f6b5..0000000000 --- a/libibex/diskarray.c +++ /dev/null @@ -1,255 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- - * - * Copyright (C) 2000 Helix Code, Inc. - * - * Authors: Michael Zucchi <notzed@helixcode.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public License - * as published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with the Gnome Library; see the file COPYING.LIB. If not, - * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -/* a disk based array storage class */ - - -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <unistd.h> - -#include <glib.h> - -#include "block.h" -#include "index.h" - -#define d(x) -/*#define DEBUG*/ - -static struct _IBEXStore *disk_create(struct _memcache *bc); -static int disk_sync(struct _IBEXStore *store); -static int disk_close(struct _IBEXStore *store); - -static blockid_t disk_add(struct _IBEXStore *store, blockid_t head, nameid_t data); -static blockid_t disk_add_list(struct _IBEXStore *store, blockid_t head, GArray *data); -static blockid_t disk_remove(struct _IBEXStore *store, blockid_t head, nameid_t data); -static void disk_free(struct _IBEXStore *store, blockid_t head); - -static gboolean disk_find(struct _IBEXStore *store, blockid_t head, nameid_t data); -static GArray *disk_get(struct _IBEXStore *store, blockid_t head); - -struct _IBEXStoreClass ibex_diskarray_class = { - disk_create, disk_sync, disk_close, - disk_add, disk_add_list, - disk_remove, disk_free, - disk_find, disk_get -}; - -static struct _IBEXStore *disk_create(struct _memcache *bc) -{ - struct _IBEXStore *store; - - store = g_malloc0(sizeof(*store)); - store->klass = &ibex_diskarray_class; - store->blocks = bc; - - return store; -} - -static int disk_sync(struct _IBEXStore *store) -{ - /* no cache, nop */ - return 0; -} - -static int disk_close(struct _IBEXStore *store) -{ - g_free(store); - return 0; -} - -static blockid_t -disk_add(struct _IBEXStore *store, blockid_t head, nameid_t data) -{ - struct _block *block; - struct _block *newblock; - blockid_t new; - - if (head == 0) { - head = ibex_block_get(store->blocks); - } - block = ibex_block_read(store->blocks, head); - - d(printf("adding record %d to block %d (next = %d)\n", data, head, block->next)); - - if (block->used < sizeof(block->bl_data)/sizeof(block->bl_data[0])) { - d(printf("adding record into block %d %d\n", head, data)); - block->bl_data[block->used] = data; - block->used++; - ibex_block_dirty(block); - return head; - } else { - new = ibex_block_get(store->blocks); - newblock = ibex_block_read(store->blocks, new); - newblock->next = head; - newblock->bl_data[0] = data; - newblock->used = 1; - d(printf("adding record into new %d %d, next =%d\n", new, data, newblock->next)); - ibex_block_dirty(newblock); - return new; - } -} - -static blockid_t -disk_add_list(struct _IBEXStore *store, blockid_t head, GArray *data) -{ - struct _block *block; - struct _block *newblock; - blockid_t new; - int copied = 0; - int left, space, tocopy; - - if (head == 0) { - head = ibex_block_get(store->blocks); - } - block = ibex_block_read(store->blocks, head); - - while (copied < data->len) { - left = data->len - copied; - space = sizeof(block->bl_data)/sizeof(block->bl_data[0]) - block->used; - if (space) { - tocopy = MIN(left, space); - memcpy(block->bl_data+block->used, &g_array_index(data, blockid_t, copied), tocopy*sizeof(blockid_t)); - block->used += tocopy; - ibex_block_dirty(block); - } else { - new = ibex_block_get(store->blocks); - newblock = ibex_block_read(store->blocks, new); - newblock->next = head; - tocopy = MIN(left, sizeof(block->bl_data)/sizeof(block->bl_data[0])); - memcpy(newblock->bl_data, &g_array_index(data, blockid_t, copied), tocopy*sizeof(blockid_t)); - newblock->used = tocopy; - block = newblock; - head = new; - ibex_block_dirty(newblock); - } - copied += tocopy; - } - return head; -} - -static blockid_t -disk_remove(struct _IBEXStore *store, blockid_t head, nameid_t data) -{ - blockid_t node = head; - - d(printf("removing %d from %d\n", data, head)); - while (node) { - struct _block *block = ibex_block_read(store->blocks, node); - int i; - - for (i=0;i<block->used;i++) { - if (block->bl_data[i] == data) { - struct _block *start = ibex_block_read(store->blocks, head); - - start->used--; - block->bl_data[i] = start->bl_data[start->used]; - if (start->used == 0) { - struct _root *root = (struct _root *)ibex_block_read(store->blocks, 0); - blockid_t new; - - d(printf("dropping block %d, new head = %d\n", head, start->next)); - new = start->next; - start->next = root->free; - root->free = head; - head = new; - ibex_block_dirty((struct _block *)root); - } - ibex_block_dirty(block); - ibex_block_dirty(start); - return head; - } - } - node = block->next; - } - return head; -} - -static void disk_free(struct _IBEXStore *store, blockid_t head) -{ - blockid_t next; - struct _block *block; - - while (head) { - block = ibex_block_read(store->blocks, head); - next = block->next; - ibex_block_free(store->blocks, head); - head = next; - } -} - -static gboolean -disk_find(struct _IBEXStore *store, blockid_t head, nameid_t data) -{ - blockid_t node = head; - - d(printf("finding %d from %d\n", data, head)); - while (node) { - struct _block *block = ibex_block_read(store->blocks, node); - int i; - - for (i=0;i<block->used;i++) { - if (block->bl_data[i] == data) { - return TRUE; - } - } - node = block->next; - } - return FALSE; -} - -static GArray * -disk_get(struct _IBEXStore *store, blockid_t head) -{ - GArray *result = g_array_new(0, 0, sizeof(nameid_t)); - - while (head) { - struct _block *block = ibex_block_read(store->blocks, head); - - d(printf("getting data from block %d\n", head)); - - g_array_append_vals(result, block->bl_data, block->used); - head = block->next; - d(printf("next = %d\n", head)); - } - return result; -} - -void -ibex_diskarray_dump(struct _memcache *blocks, blockid_t head) -{ - blockid_t node = head; - - printf("dumping list %d\n", node); - while (node) { - struct _block *block = ibex_block_read(blocks, node); - int i; - - printf(" block %d used %d\n ", node, block->used); - for (i=0;i<block->used;i++) { - printf(" %d", block->bl_data[i]); - } - printf("\n"); - node = block->next; - } -} diff --git a/libibex/disktail.c b/libibex/disktail.c deleted file mode 100644 index 9f5a0dbea2..0000000000 --- a/libibex/disktail.c +++ /dev/null @@ -1,814 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- - * - * Copyright (C) 2000 Helix Code, Inc. - * - * Authors: Michael Zucchi <notzed@helixcode.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public License - * as published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with the Gnome Library; see the file COPYING.LIB. If not, - * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -/* a disk based array storage class that stores the tails of data lists - in common blocks */ - - -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <unistd.h> - -#include <glib.h> -#include <string.h> - -#include <stdio.h> - -#include "block.h" -#include "index.h" - -#define d(x) -/*#define DEBUG*/ - -/* marker to define which root keys indicate a single length key */ -#define BLOCK_ONE (1<<BLOCK_BITS) - -/* tail blocks only contain tail data ... */ -/* and we pack it in, similar to the key data, only more compact */ -struct _tailblock { - unsigned int next:32-BLOCK_BITS; /* only needs to point to block numbers */ - unsigned int used:BLOCK_BITS; /* how many entries are used */ - union { - unsigned char offset[BLOCK_SIZE-4]; /* works upto blocksize of 1024 bytes */ - nameid_t data[(BLOCK_SIZE-4)/4]; - } tailblock_u; -}; -#define tb_offset tailblock_u.offset -#define tb_data tailblock_u.data - -/* map a tail index to a block index */ -#define TAIL_INDEX(b) ((b) & (BLOCK_SIZE-1)) -/* map a tail index to a block number */ -#define TAIL_BLOCK(b) ((b) & ~(BLOCK_SIZE-1)) -/* map a block + index to a tailid */ -#define TAIL_KEY(b, i) (((b) & ~(BLOCK_SIZE-1)) | ((i) & (BLOCK_SIZE-1))) - -#define TAIL_THRESHOLD ((BLOCK_SIZE-8)/6) - -static struct _IBEXStore *disk_create(struct _memcache *bc); -static int disk_sync(struct _IBEXStore *store); -static int disk_close(struct _IBEXStore *store); - -static blockid_t disk_add(struct _IBEXStore *store, blockid_t *head, blockid_t *tail, nameid_t data); -static blockid_t disk_add_list(struct _IBEXStore *store, blockid_t *head, blockid_t *tail, GArray *data); -static blockid_t disk_remove(struct _IBEXStore *store, blockid_t *head, blockid_t *tail, nameid_t data); -static void disk_free(struct _IBEXStore *store, blockid_t head, blockid_t tail); - -static gboolean disk_find(struct _IBEXStore *store, blockid_t head, blockid_t tail, nameid_t data); -static GArray *disk_get(struct _IBEXStore *store, blockid_t head, blockid_t tail); - -struct _IBEXStoreClass ibex_diskarray_class = { - disk_create, disk_sync, disk_close, - disk_add, disk_add_list, - disk_remove, disk_free, - disk_find, disk_get -}; - - -static int -tail_info(struct _tailblock *bucket, nameid_t tailid, blockid_t **startptr) -{ - blockid_t *start, *end; - int index; - - /* get start/end of area to zap */ - index = TAIL_INDEX(tailid); - start = &bucket->tb_data[bucket->tb_offset[index]]; - if (index == 0) { - end = &bucket->tb_data[sizeof(bucket->tb_data)/sizeof(bucket->tb_data[0])]; - } else { - end = &bucket->tb_data[bucket->tb_offset[index-1]]; - } - if (startptr) - *startptr = start; - return end-start; -} - -/* compresses (or expand) the bucket entry, to the new size */ -static void -tail_compress(struct _tailblock *bucket, int index, int newsize) -{ - int i; - blockid_t *start, *end, *newstart; - - /* get start/end of area to zap */ - start = &bucket->tb_data[bucket->tb_offset[index]]; - if (index == 0) { - end = &bucket->tb_data[sizeof(bucket->tb_data)/sizeof(bucket->tb_data[0])]; - } else { - end = &bucket->tb_data[bucket->tb_offset[index-1]]; - } - - if (end-start == newsize) - return; - - /* - XXXXXXXXXXXXXXXXXXXXXXXXXXXXXyyyyy - 0 20 25 - - newsize = 0 - end = 25 - newstart = 0 - start = 20 - - newstart+(end-start)-newsize = 5 - i = start-newstart - - XXXXXXXXXXXXXXXXXXXXXXXXXXXXXyyyyy - 0 20 25 - - newsize = 2 - end = 25 - newstart = 0 - start = 20 - - newstart+(end-start)-newsize = 3 - i = start-newstart + MIN(end-start, newsize)) = 22 - - XXXXXXXXXXXXXXXXXXXXXXXXXXXXX - 5 25 - newsize = 5 - end = 25 - start = 25 - newstart = 5 - - newstart+(end-start)-newsize = 0 - i = start-newstart = 20 - - XXXXXXXXXXXXXXXXXXXXXXXXXXXXXyy - 3 23 25 - newsize = 5 - end = 25 - start = 23 - newstart = 3 - - newstart+(end-start)-newsize = 0 - i = start-newstart + MIN(end-start, newsize) = 22 - - */ - - - /* fixup data */ - newstart = &bucket->tb_data[bucket->tb_offset[bucket->used-1]]; - - g_assert(newstart+(end-start)-newsize <= &bucket->tb_data[sizeof(bucket->tb_data)/sizeof(bucket->tb_data[0])]); - g_assert(newstart + (start-newstart) + MIN(end-start, newsize) <= &bucket->tb_data[sizeof(bucket->tb_data)/sizeof(bucket->tb_data[0])]); - g_assert(newstart+(end-start)-newsize >= &bucket->tb_offset[bucket->used]); - g_assert(newstart + (start-newstart) + MIN(end-start, newsize) >= &bucket->tb_offset[bucket->used]); - - memmove(newstart+(end-start)-newsize, newstart, ((start-newstart)+MIN(end-start, newsize)) * sizeof(blockid_t)); - - /* fixup key pointers */ - for (i=index;i<bucket->used;i++) { - bucket->tb_offset[i] += (end-start)-newsize; - } - ibex_block_dirty((struct _block *)bucket); -} - -/* - returns the number of blockid's free -*/ -static int -tail_space(struct _tailblock *tail) -{ - if (tail->used == 0) - return sizeof(tail->tb_data)/sizeof(tail->tb_data[0])-1; - - return &tail->tb_data[tail->tb_offset[tail->used-1]] - - (blockid_t *)&tail->tb_offset[tail->used]; -} - -static void -tail_dump(struct _memcache *blocks, blockid_t tailid) -{ - int i; - struct _tailblock *tail = (struct _tailblock *)ibex_block_read(blocks, TAIL_BLOCK(tailid)); - - printf("Block %d, used %d\n", tailid, tail->used); - for (i=0;i<sizeof(struct _tailblock)/sizeof(unsigned int);i++) { - printf(" %08x", ((unsigned int *)tail)[i]); - } - printf("\n"); -} - -static blockid_t -tail_get(struct _memcache *blocks, int size) -{ - blockid_t tailid; - struct _tailblock *tail; - int freeindex; - blockid_t *end; - int i, count = 0; - - d(printf("looking for a tail node with %d items in it\n", size)); - - /* look for a node with enough space, if we dont find it fairly - quickly, just quit. needs a better free algorithm i think ... */ - tailid = blocks->root.tail; - while (tailid && count<5) { - int space; - - d(printf(" checking tail node %d\n", tailid)); - - tail = (struct _tailblock *)ibex_block_read(blocks, tailid); - - if (tail->used == 0) { - /* assume its big enough ... */ - tail->used = 1; - tail->tb_offset[0] = sizeof(tail->tb_data)/sizeof(tail->tb_data[0]) - size; - d(printf("allocated %d (%d), used %d\n", tailid, tailid, tail->used)); - ibex_block_dirty((struct _block *)tail); - - g_assert(&tail->tb_offset[tail->used-1] - < &tail->tb_data[tail->tb_offset[tail->used-1]]); - - return tailid; - } - - g_assert(&tail->tb_offset[tail->used-1] - < &tail->tb_data[tail->tb_offset[tail->used-1]]); - - /* see if we have a free slot first */ - freeindex = -1; - end = &tail->tb_data[sizeof(tail->tb_data)/sizeof(tail->tb_data[0])]; - for (i=0;i<tail->used;i++) { - if (end == &tail->tb_data[tail->tb_offset[i]]) { - freeindex = i; - break; - } - end = &tail->tb_data[tail->tb_offset[i]]; - } - - /* determine how much space we have available - incl any extra header we might need */ - space = ((char *)&tail->tb_data[tail->tb_offset[tail->used-1]]) - - ((char *)&tail->tb_offset[tail->used]) - /* FIXMEL work out why this is out a little bit */ - - 8; - if (freeindex == -1) - space -= sizeof(tail->tb_offset[0]); - - /* if we have enough, set it up, creating a new entry if necessary */ - /* for some really odd reason the compiler promotes this expression to unsigned, hence - the requirement for the space>0 check ... */ - if (space>0 && space > size*sizeof(blockid_t)) { - d(printf("space = %d, size = %d size*sizeof() = %d truth = %d\n", space, size, size*sizeof(blockid_t), space>size*sizeof(blockid_t))); - if (freeindex == -1) { - freeindex = tail->used; - tail->tb_offset[tail->used] = tail->tb_offset[tail->used-1]; - tail->used++; - } - tail_compress(tail, freeindex, size); - ibex_block_dirty((struct _block *)tail); - d(printf("allocated %d (%d), used %d\n", tailid, TAIL_KEY(tailid, freeindex), tail->used)); - return TAIL_KEY(tailid, freeindex); - } - count++; - tailid = block_location(tail->next); - } - - d(printf("allocating new data node for tail data\n")); - tailid = ibex_block_get(blocks); - tail = (struct _tailblock *)ibex_block_read(blocks, tailid); - tail->next = block_number(blocks->root.tail); - blocks->root.tail = tailid; - tail->used = 1; - tail->tb_offset[0] = sizeof(tail->tb_data)/sizeof(tail->tb_data[0]) - size; - ibex_block_dirty((struct _block *)tail); - d(printf("allocated %d (%d), used %d\n", tailid, TAIL_KEY(tailid, 0), tail->used)); - - g_assert(&tail->tb_offset[tail->used-1] - < &tail->tb_data[tail->tb_offset[tail->used-1]]); - - return TAIL_KEY(tailid, 0); -} - -static void -tail_free(struct _memcache *blocks, blockid_t tailid) -{ - struct _tailblock *tail; - - d(printf("freeing tail id %d\n", tailid)); - - if (tailid == 0) - return; - - tail = (struct _tailblock *)ibex_block_read(blocks, TAIL_BLOCK(tailid)); - d(printf(" tail %d used %d\n", tailid, tail->used)); - g_assert(tail->used); - if (TAIL_INDEX(tailid) == tail->used - 1) { - tail->used --; - } else { - tail_compress(tail, TAIL_INDEX(tailid), 0); - } - ibex_block_dirty((struct _block *)tail); -} - -static struct _IBEXStore *disk_create(struct _memcache *bc) -{ - struct _IBEXStore *store; - - store = g_malloc0(sizeof(*store)); - store->klass = &ibex_diskarray_class; - store->blocks = bc; - - return store; -} - -static int disk_sync(struct _IBEXStore *store) -{ - /* no cache, nop */ - return 0; -} - -static int disk_close(struct _IBEXStore *store) -{ - g_free(store); - return 0; -} - -static blockid_t -disk_add(struct _IBEXStore *store, blockid_t *headptr, blockid_t *tailptr, nameid_t data) -{ - struct _block *block; - struct _block *newblock; - blockid_t new, head = *headptr /*, tail = *tailptr*/; - - g_error("Inbimplemented"); - - if (head == 0) { - head = ibex_block_get(store->blocks); - } - block = ibex_block_read(store->blocks, head); - - d(printf("adding record %d to block %d (next = %d)\n", data, head, block->next)); - - if (block->used < sizeof(block->bl_data)/sizeof(block->bl_data[0])) { - (printf("adding record into block %d %d\n", head, data)); - block->bl_data[block->used] = data; - block->used++; - ibex_block_dirty(block); - return head; - } else { - new = ibex_block_get(store->blocks); - newblock = ibex_block_read(store->blocks, new); - newblock->next = block_number(head); - newblock->bl_data[0] = data; - newblock->used = 1; - d(printf("adding record into new %d %d, next =%d\n", new, data, newblock->next)); - ibex_block_dirty(newblock); - return new; - } -} - -static blockid_t -disk_add_blocks_internal(struct _IBEXStore *store, blockid_t *headptr, blockid_t *tailptr, GArray *data) -{ - blockid_t head = *headptr, tail = *tailptr, new; - int tocopy; - struct _tailblock *tailblock; - struct _block *block, *newblock; - int space, copied = 0, left; - - /* assumes this funciton is in control of any tail creation */ - g_assert(tail == 0); - - d(printf("Adding %d items to block list\n", data->len)); - - if (head == 0) { - head = ibex_block_get(store->blocks); - d(printf("allocating new head %d\n", head)); - } - block = ibex_block_read(store->blocks, head); - - /* ensure the first block is full before proceeding */ - space = sizeof(block->bl_data)/sizeof(block->bl_data[0]) - block->used; - if (space) { - tocopy = MIN(data->len, space); - memcpy(block->bl_data+block->used, &g_array_index(data, blockid_t, copied), tocopy*sizeof(blockid_t)); - block->used += tocopy; - ibex_block_dirty(block); - copied = tocopy; - d(printf("copied %d items to left over last node\n", tocopy)); - } - - while (copied < data->len) { - left = data->len - copied; - /* do we drop the rest in a tail? */ - if (left < TAIL_THRESHOLD) { - d(printf("Storing remaining %d items in tail\n", left)); - tocopy = left; - new = tail_get(store->blocks, tocopy); - tailblock = (struct _tailblock *)ibex_block_read(store->blocks, TAIL_BLOCK(new)); - memcpy(&tailblock->tb_data[tailblock->tb_offset[TAIL_INDEX(new)]], - &g_array_index(data, blockid_t, copied), tocopy*sizeof(blockid_t)); - *tailptr = new; - } else { - new = ibex_block_get(store->blocks); - newblock = (struct _block *)ibex_block_read(store->blocks, new); - newblock->next = block_number(head); - tocopy = MIN(left, sizeof(block->bl_data)/sizeof(block->bl_data[0])); - d(printf("storing %d items in own block\n", tocopy)); - memcpy(newblock->bl_data, &g_array_index(data, blockid_t, copied), tocopy*sizeof(blockid_t)); - newblock->used = tocopy; - block = newblock; - head = new; - ibex_block_dirty(newblock); - } - copied += tocopy; - } - - *headptr = head; - return head; -} -/* - case 1: - no head, no tail, adding a lot of data - add blocks until the last, which goes in a tail node - case 2: - no head, no tail, adding a little data - just add a tail node - case 3: - no head, tail, total exceeds a block - merge as much as possible into new full blocks, then the remainder in the tail - case 4: - no head, tail, room in existing tail for data - add new data to tail node - case 5: - no head, tail, no room in existing tail for data - add a new tail node, copy data across, free old tail node -*/ - -static blockid_t -disk_add_list(struct _IBEXStore *store, blockid_t *headptr, blockid_t *tailptr, GArray *data) -{ - blockid_t new, head = *headptr, tail = *tailptr, *start; - struct _tailblock *tailblock, *tailnew; - int len; - GArray *tmpdata = NULL; - - d(printf("adding %d items head=%d tail=%d\n", data->len, head, tail)); - if (data->len == 0) - return head; - - /* store length=1 data in the tail pointer */ - if (head == 0 && tail == 0 && data->len == 1) { - *headptr = BLOCK_ONE; - *tailptr = g_array_index(data, blockid_t, 0); - return BLOCK_ONE; - } - /* if we got length=1 data to append to, upgrade it to a real block list */ - if (head == BLOCK_ONE) { - tmpdata = g_array_new(0, 0, sizeof(blockid_t)); - g_array_append_vals(tmpdata, data->data, data->len); - g_array_append_val(tmpdata, tail); - head = *headptr = 0; - tail = *tailptr = 0; - } - - /* if we have no head, then check the tail */ - if (head == 0) { - if (tail == 0) { - if (data->len >= TAIL_THRESHOLD) { - /* add normally */ - head = disk_add_blocks_internal(store, headptr, tailptr, data); - } else { - /* else add to a tail block */ - new = tail_get(store->blocks, data->len); - d(printf("adding %d items to a tail block %d\n", data->len, new)); - tailnew = (struct _tailblock *)ibex_block_read(store->blocks, TAIL_BLOCK(new)); - memcpy(&tailnew->tb_data[tailnew->tb_offset[TAIL_INDEX(new)]], - data->data, data->len*sizeof(blockid_t)); - *tailptr = new; - ibex_block_dirty((struct _block *)tailnew); - } - } else { - tailblock = (struct _tailblock *)ibex_block_read(store->blocks, TAIL_BLOCK(tail)); - len = tail_info(tailblock, tail, &start); - /* case 3 */ - if (len + data->len >= TAIL_THRESHOLD) { - /* this is suboptimal, but should work - merge the tail data with - our new data, and write it out */ - if (tmpdata == NULL) { - tmpdata = g_array_new(0, 0, sizeof(blockid_t)); - g_array_append_vals(tmpdata, data->data, data->len); - } - g_array_append_vals(tmpdata, start, len); - *tailptr = 0; - tail_free(store->blocks, tail); - head = disk_add_blocks_internal(store, headptr, tailptr, tmpdata); - } else if (tail_space(tailblock) >= data->len) { - /* can we just expand this in our node, or do we need a new one? */ - tail_compress(tailblock, TAIL_INDEX(tail), data->len + len); - memcpy(&tailblock->tb_data[tailblock->tb_offset[TAIL_INDEX(tail)] + len], - data->data, data->len * sizeof(blockid_t)); - ibex_block_dirty((struct _block *)tailblock); - } else { - /* we need to allocate a new tail node */ - new = tail_get(store->blocks, data->len + len); - /* and copy the data across */ - tailnew = (struct _tailblock *)ibex_block_read(store->blocks, TAIL_BLOCK(new)); - memcpy(&tailnew->tb_data[tailnew->tb_offset[TAIL_INDEX(new)]], - start, len*sizeof(blockid_t)); - memcpy(&tailnew->tb_data[tailnew->tb_offset[TAIL_INDEX(new)]+len], - data->data, data->len*sizeof(blockid_t)); - tail_free(store->blocks, tail); - ibex_block_dirty((struct _block *)tailnew); - *tailptr = new; - } - } - } else { - if (tail) { - /* read/merge the tail with the new data, rewrite out. - suboptimal, but it should be 'ok' ? */ - tailblock = (struct _tailblock *)ibex_block_read(store->blocks, TAIL_BLOCK(tail)); - len = tail_info(tailblock, tail, &start); - tmpdata = g_array_new(0, 0, sizeof(blockid_t)); - g_array_append_vals(tmpdata, start, len); - g_array_append_vals(tmpdata, data->data, data->len); - *tailptr = 0; - tail_free(store->blocks, tail); - head = disk_add_blocks_internal(store, headptr, tailptr, tmpdata); - } else { - head = disk_add_blocks_internal(store, headptr, tailptr, data); - } - } - if (tmpdata) - g_array_free(tmpdata, TRUE); - - return head; -} - -static blockid_t -disk_remove(struct _IBEXStore *store, blockid_t *headptr, blockid_t *tailptr, nameid_t data) -{ - blockid_t head = *headptr, node = *headptr, tail = *tailptr; - int i; - - /* special case for 1-item nodes */ - if (head == BLOCK_ONE) { - if (tail == data) { - *tailptr = 0; - *headptr = 0; - head = 0; - } - return head; - } - - d(printf("removing %d from %d\n", data, head)); - while (node) { - struct _block *block = ibex_block_read(store->blocks, node); - - for (i=0;i<block->used;i++) { - if (block->bl_data[i] == data) { - struct _block *start = ibex_block_read(store->blocks, head); - - d(printf("removing data from block %d\n ", head)); - - start->used--; - block->bl_data[i] = start->bl_data[start->used]; - if (start->used == 0) { - blockid_t new; - - d(printf("dropping block %d, new head = %d\n", head, start->next)); - new = block_location(start->next); - start->next = block_number(store->blocks->root.free); - store->blocks->root.free = head; - head = new; - } - ibex_block_dirty(block); - ibex_block_dirty(start); - *headptr = head; - return head; - } - } - node = block_location(block->next); - } - - if (tail) { - struct _tailblock *tailblock = (struct _tailblock *)ibex_block_read(store->blocks, TAIL_BLOCK(tail)); - int len; - blockid_t *start; - - len = tail_info(tailblock, tail, &start); - for (i=0;i<len;i++) { - if (start[i] == data) { - for (;i<len-1;i++) - start[i] = start[i+1]; - if (len == 1) - *tailptr = 0; - if (len == 1 && (tailblock->used-1) == TAIL_INDEX(tail)) { - d(printf("dropping/unlinking tailblock %d (%d) used = %d\n", - TAIL_BLOCK(tail), tail, tailblock->used)); - tailblock->used--; - /* drop/unlink block? */ - ibex_block_dirty((struct _block *)tailblock); - *tailptr = 0; - } else { - tail_compress(tailblock, TAIL_INDEX(tail), len-1); - ibex_block_dirty((struct _block *)tailblock); - } - } - } - - } - - return head; -} - -static void disk_free(struct _IBEXStore *store, blockid_t head, blockid_t tail) -{ - blockid_t next; - struct _block *block; - - if (head == BLOCK_ONE) - return; - - while (head) { - d(printf("freeing block %d\n", head)); - block = ibex_block_read(store->blocks, head); - next = block_location(block->next); - ibex_block_free(store->blocks, head); - head = next; - } - if (tail) { - struct _tailblock *tailblock = (struct _tailblock *)ibex_block_read(store->blocks, TAIL_BLOCK(tail)); - d(printf("freeing tail block %d (%d)\n", TAIL_BLOCK(tail), tail)); - tail_compress(tailblock, TAIL_INDEX(tail), 0); - ibex_block_dirty((struct _block *)tailblock); - } -} - -static gboolean -disk_find(struct _IBEXStore *store, blockid_t head, blockid_t tail, nameid_t data) -{ - blockid_t node = head; - int i; - - d(printf("finding %d from %d\n", data, head)); - - if (head == BLOCK_ONE) - return data == tail; - - /* first check full blocks */ - while (node) { - struct _block *block = ibex_block_read(store->blocks, node); - - for (i=0;i<block->used;i++) { - if (block->bl_data[i] == data) { - return TRUE; - } - } - node = block_location(block->next); - } - - /* then check tail */ - if (tail) { - struct _tailblock *tailblock = (struct _tailblock *)ibex_block_read(store->blocks, TAIL_BLOCK(tail)); - int len; - blockid_t *start; - - len = tail_info(tailblock, tail, &start); - for (i=0;i<len;i++) { - if (start[i] == data) - return TRUE; - } - } - - return FALSE; -} - -static GArray * -disk_get(struct _IBEXStore *store, blockid_t head, blockid_t tail) -{ - GArray *result = g_array_new(0, 0, sizeof(nameid_t)); - - if (head == BLOCK_ONE) { - g_array_append_val(result, tail); - return result; - } - - while (head) { - struct _block *block = ibex_block_read(store->blocks, head); - - d(printf("getting data from block %d\n", head)); - - g_array_append_vals(result, block->bl_data, block->used); - head = block_location(block->next); - d(printf("next = %d\n", head)); - } - - /* chuck on any tail data as well */ - if (tail) { - struct _tailblock *tailblock; - int len; - blockid_t *start; - - tailblock = (struct _tailblock *)ibex_block_read(store->blocks, TAIL_BLOCK(tail)); - len = tail_info(tailblock, tail, &start); - g_array_append_vals(result, start, len); - } - return result; -} - -void -ibex_diskarray_dump(struct _memcache *blocks, blockid_t head, blockid_t tail) -{ - blockid_t node = head; - - printf("dumping list %d tail %d\n", node, tail); - if (head == BLOCK_ONE) { - printf(" 1 length index: %d\n", tail); - return; - } - - while (node) { - struct _block *block = ibex_block_read(blocks, node); - int i; - - printf(" block %d used %d\n ", node, block->used); - for (i=0;i<block->used;i++) { - printf(" %d", block->bl_data[i]); - } - printf("\n"); - node = block_location(block->next); - } - - printf("tail: "); - if (tail) { - struct _tailblock *tailblock; - int len; - blockid_t *start; - int i; - - tailblock = (struct _tailblock *)ibex_block_read(blocks, TAIL_BLOCK(tail)); - len = tail_info(tailblock, tail, &start); - for (i=0;i<len;i++) - printf(" %d", start[i]); - } - printf("\n"); -} - -#if 0 -int main(int argc, char **argv) -{ - struct _memcache *bc; - struct _IBEXStore *disk; - int i; - blockid_t data[100]; - GArray adata; - blockid_t head=0, tail=0; - - for (i=0;i<100;i++) { - data[i] = i; - } - - bc = ibex_block_cache_open("index.db", O_CREAT|O_RDWR, 0600); - disk = ibex_diskarray_class.create(bc); - - head = 0; - tail = 0; - adata.data = data; - adata.len = 70; - for (i=0;i<100;i++) { - printf("Loop %d\n", i); - ibex_diskarray_class.add_list(disk, &head, &tail, &adata); - ibex_diskarray_dump(bc, head, tail); - } - -#if 0 - for (i=1;i<100;i++) { - printf("inserting %d items\n", i); - adata.data = data; - adata.len = i; - head=0; - tail=0; - ibex_diskarray_class.add_list(disk, &head, &tail, &adata); - ibex_diskarray_dump(bc, head, tail); - } -#endif - ibex_diskarray_class.close(disk); - ibex_block_cache_close(bc); - return 0; -} - -#endif diff --git a/libibex/dumpindex.c b/libibex/dumpindex.c deleted file mode 100644 index cf4f02cc8a..0000000000 --- a/libibex/dumpindex.c +++ /dev/null @@ -1,59 +0,0 @@ -/* - Dump the hash tables from an ibex file. - */ - -#include <stdio.h> -#include <stdlib.h> - -#include "ibex_internal.h" - -extern void ibex_hash_dump(struct _IBEXIndex *index); - -static void -index_iterate(struct _IBEXIndex *index) -{ - struct _IBEXCursor *idc; - int len; - char *key; - int total = 0, totallen = 0; - - idc = index->klass->get_cursor(index); - key = idc->klass->next_key(idc, &len); - while (len) { - total++; - totallen += len; - printf("%s\n", key); - g_free(key); - key = idc->klass->next_key(idc, &len); - } - g_free(key); - - idc->klass->close(idc); - - printf("Iterate Totals: %d items, total bytes %d\n", total, totallen); -} - -int main(int argc, char **argv) -{ - ibex *ib; - - if (argc != 2) { - printf("Usage: %s ibexfile\n", argv[0]); - return 1; - } - ib = ibex_open(argv[1], O_RDONLY, 0); - if (ib == NULL) { - perror("Opening ibex file\n"); - return 1; - } - - ibex_hash_dump(ib->words->wordindex); - ibex_hash_dump(ib->words->nameindex); - - index_iterate(ib->words->wordindex); - index_iterate(ib->words->nameindex); - - ibex_close(ib); - - return 0; -} diff --git a/libibex/hash.c b/libibex/hash.c deleted file mode 100644 index f79ee8f55e..0000000000 --- a/libibex/hash.c +++ /dev/null @@ -1,859 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- - * - * Copyright (C) 2000 Helix Code, Inc. - * - * Authors: Michael Zucchi <notzed@helixcode.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public License - * as published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with the Gnome Library; see the file COPYING.LIB. If not, - * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -/* hash based index mechanism */ - -#include <stdio.h> -#include <stdlib.h> - -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <unistd.h> -#include <string.h> - -#include "block.h" -#include "index.h" - -#define d(x) - -#define HASH_SIZE (1024) -#define KEY_THRESHOLD (sizeof(struct _hashkey) + 4) /* minimum number of free bytes we worry about - maintaining free blocks for */ -#define ARRAY_LEN(a) (sizeof(a)/sizeof(a[0])) - -typedef guint32 hashid_t; - -struct _HASHCursor { - struct _IBEXCursor cursor; - - hashid_t key; - hashid_t block; - unsigned int index; - unsigned int size; -}; - -static struct _IBEXIndex *hash_create(struct _memcache *bc, int size); -static struct _IBEXIndex *hash_open(struct _memcache *bc, blockid_t root); -static int hash_sync(struct _IBEXIndex *index); -static int hash_close(struct _IBEXIndex *index); - -static hashid_t hash_find(struct _IBEXIndex *index, const char *key, int keylen); -static void hash_remove(struct _IBEXIndex *index, const char *key, int keylen); -static hashid_t hash_insert(struct _IBEXIndex *index, const char *key, int keylen); -static char *hash_get_key(struct _IBEXIndex *index, hashid_t hashbucket, int *len); -static void hash_set_data_block(struct _IBEXIndex *index, hashid_t keyid, blockid_t blockid, blockid_t tail); -static blockid_t hash_get_data_block(struct _IBEXIndex *index, hashid_t keyid, blockid_t *tail); -static struct _IBEXCursor *hash_get_cursor(struct _IBEXIndex *index); - -static struct _IBEXCursor *hash_cursor_create(struct _IBEXIndex *); -static void hash_cursor_close(struct _IBEXCursor *); -static guint32 hash_cursor_next(struct _IBEXCursor *); -static char *hash_cursor_next_key(struct _IBEXCursor *, int *keylenptr); - -struct _IBEXIndexClass ibex_hash_class = { - hash_create, hash_open, - hash_sync, hash_close, - hash_find, - hash_remove, - hash_insert, - hash_get_key, - hash_set_data_block, - hash_get_data_block, - hash_get_cursor, -}; - -struct _IBEXCursorClass ibex_hash_cursor_class = { - hash_cursor_close, - hash_cursor_next, - hash_cursor_next_key -}; - -/* the reason we have the tail here is that otherwise we need to - have a 32 bit blockid for the root node; which would make this - structure the same size anyway, with about 24 wasted bits */ -struct _hashkey { - blockid_t next; /* next in hash chain */ - blockid_t tail; - unsigned int root:32-BLOCK_BITS; - unsigned int keyoffset:BLOCK_BITS; -}; - -struct _hashblock { - unsigned int next:32-BLOCK_BITS; /* next block, linked list of all key blocks: block number */ - unsigned int used:BLOCK_BITS; /* number of elements used */ - union { - struct _hashkey keys[(BLOCK_SIZE-4)/sizeof(struct _hashkey)]; - char keydata[BLOCK_SIZE-4]; - } hashblock_u; -}; -#define hb_keys hashblock_u.keys -#define hb_keydata hashblock_u.keydata - -/* size of block overhead + 2 key block overhead */ -#define MAX_KEYLEN (BLOCK_SIZE - 4 - 12 - 12) - -/* root block for a hash index */ -struct _hashroot { - hashid_t free; /* free list */ - guint32 size; /* how big the hash table is */ - hashid_t keys; /* linked list of blocks */ - hashid_t table[(BLOCK_SIZE-8)/sizeof(hashid_t)]; /* pointers to blocks of pointers */ -}; - -struct _hashtableblock { - hashid_t buckets[BLOCK_SIZE/sizeof(hashid_t)]; -}; - -/* map a hash index to a block index */ -#define HASH_INDEX(b) ((b) & (BLOCK_SIZE-1)) -/* map a hash index to a block number */ -#define HASH_BLOCK(b) ((b) & ~(BLOCK_SIZE-1)) -/* map a block + index to a hash key */ -#define HASH_KEY(b, i) (((b) & ~(BLOCK_SIZE-1)) | ((i) & (BLOCK_SIZE-1))) - -/* taken from tdb/gdbm */ -static unsigned int hash_key(const unsigned char *key, int keylen) -{ - char *newkey; - newkey = alloca(keylen+1); - memcpy(newkey, key, keylen); - newkey[keylen]=0; - return g_str_hash(newkey); -#if 0 - unsigned int value; /* Used to compute the hash value. */ - unsigned int i; /* Used to cycle through random values. */ - - /* Set the initial value from the key size. */ - value = 0x238F13AF * keylen; - for (i=0; i < keylen; i++) { - value = (value + (key[i] << (i*5 % 24))); - } - - value = (1103515243 * value + 12345); - - return value; -#endif -} - -/* create a new hash table, return a pointer to its root block */ -static struct _IBEXIndex * -hash_create(struct _memcache *bc, int size) -{ - blockid_t root, block; - struct _hashroot *hashroot; - int i; - struct _hashtableblock *table; - struct _IBEXIndex *index; - - g_assert(size<=10240); - - d(printf("initialising hash table, size = %d\n", size)); - - index = g_malloc0(sizeof(*index)); - index->blocks = bc; - index->klass = &ibex_hash_class; - root = ibex_block_get(bc); - index->root = root; - d(printf(" root = %d\n", root)); - hashroot = (struct _hashroot *)ibex_block_read(bc, root); - hashroot->free = 0; - hashroot->size = size; - ibex_block_dirty((struct _block *)hashroot); - for (i=0;i<size/(BLOCK_SIZE/sizeof(blockid_t));i++) { - d(printf("initialising hash table index block %d\n", i)); - block = hashroot->table[i] = ibex_block_get(bc); - table = (struct _hashtableblock *)ibex_block_read(bc, block); - memset(table, 0, sizeof(table)); - ibex_block_dirty((struct _block *)table); - } - - return index; -} - -static struct _IBEXIndex * -hash_open(struct _memcache *bc, blockid_t root) -{ - struct _IBEXIndex *index; - - /* FIXME: check a 'magic', and the root for validity */ - - index = g_malloc0(sizeof(*index)); - index->blocks = bc; - index->root = root; - index->klass = &ibex_hash_class; - - return index; -} - - -static int hash_sync(struct _IBEXIndex *index) -{ - /* nop, index always synced on disk (at least, to blocks) */ - return 0; -} - -static int hash_close(struct _IBEXIndex *index) -{ -#ifdef INDEX_STAT - printf("Performed %d lookups, average %f depth\n", index->lookups, (double)index->lookup_total/index->lookups); -#endif - g_free(index); - return 0; -} - -/* get an iterator class */ -static struct _IBEXCursor *hash_get_cursor(struct _IBEXIndex *index) -{ - return hash_cursor_create(index); -} - -/* convert a hashbucket id into a name */ -static char * -hash_get_key(struct _IBEXIndex *index, hashid_t hashbucket, int *len) -{ - struct _hashblock *bucket; - int ind; - char *ret, *start, *end; - - if (hashbucket == 0) { - if (len) - *len = 0; - return g_strdup(""); - } - - bucket = (struct _hashblock *)ibex_block_read(index->blocks, HASH_BLOCK(hashbucket)); - ind = HASH_INDEX(hashbucket); - - g_assert(ind < bucket->used); - - start = &bucket->hb_keydata[bucket->hb_keys[ind].keyoffset]; - if (ind == 0) { - end = &bucket->hb_keydata[sizeof(bucket->hb_keydata)/sizeof(bucket->hb_keydata[0])]; - } else { - end = &bucket->hb_keydata[bucket->hb_keys[ind-1].keyoffset]; - } - - ret = g_malloc(end-start+1); - memcpy(ret, start, end-start); - ret[end-start]=0; - if (len) - *len = end-start; - return ret; -} - -/* sigh, this is fnugly code ... */ -static hashid_t -hash_find(struct _IBEXIndex *index, const char *key, int keylen) -{ - struct _hashroot *hashroot; - guint32 hash; - int hashentry; - blockid_t hashtable; - hashid_t hashbucket; - struct _hashtableblock *table; - - g_assert(index != 0); - g_assert(index->root != 0); - - d(printf("finding hash %.*s\n", keylen, key)); - - /* truncate the key to the maximum size */ - if (keylen > MAX_KEYLEN) - keylen = MAX_KEYLEN; - - hashroot = (struct _hashroot *)ibex_block_read(index->blocks, index->root); - - /* find the table containing this entry */ - hash = hash_key(key, keylen) % hashroot->size; - hashtable = hashroot->table[hash / (BLOCK_SIZE/sizeof(blockid_t))]; - g_assert(hashtable != 0); - table = (struct _hashtableblock *)ibex_block_read(index->blocks, hashtable); - hashentry = hash % (BLOCK_SIZE/sizeof(blockid_t)); - /* and its bucket */ - hashbucket = table->buckets[hashentry]; - -#ifdef INDEX_STAT - index->lookups++; -#endif - /* go down the bucket chain, reading each entry till we are done ... */ - while (hashbucket != 0) { - struct _hashblock *bucket; - char *start, *end; - int ind; - -#ifdef INDEX_STAT - index->lookup_total++; -#endif - - d(printf(" checking bucket %d\n", hashbucket)); - - /* get the real bucket id from the hashbucket id */ - bucket = (struct _hashblock *)ibex_block_read(index->blocks, HASH_BLOCK(hashbucket)); - /* and get the key number within the block */ - ind = HASH_INDEX(hashbucket); - - g_assert(ind < bucket->used); - - start = &bucket->hb_keydata[bucket->hb_keys[ind].keyoffset]; - if (ind == 0) { - end = &bucket->hb_keydata[sizeof(bucket->hb_keydata)/sizeof(bucket->hb_keydata[0])]; - } else { - end = &bucket->hb_keydata[bucket->hb_keys[ind-1].keyoffset]; - } - if ( (end-start) == keylen - && memcmp(start, key, keylen) == 0) { - return hashbucket; - } - hashbucket = bucket->hb_keys[ind].next; - } - return 0; -} - -static int -hash_info(struct _hashblock *bucket, int index) -{ - char *start, *end; - - g_assert(index < bucket->used); - - start = &bucket->hb_keydata[bucket->hb_keys[index].keyoffset]; - if (index == 0) { - end = &bucket->hb_keydata[sizeof(bucket->hb_keydata)/sizeof(bucket->hb_keydata[0])]; - } else { - end = &bucket->hb_keydata[bucket->hb_keys[index-1].keyoffset]; - } - - return end-start; -} - - -/* TODO: get rid of hash_compress/remove and just have one a-la the disktail code */ - -/* compresses the bucket 'bucket', removing data - at index 'index' */ -static void -hash_compress(struct _hashblock *bucket, int index) -{ - int i; - char *start, *end, *newstart; - - /* get start/end of area to zap */ - start = &bucket->hb_keydata[bucket->hb_keys[index].keyoffset]; - if (index == 0) { - end = &bucket->hb_keydata[sizeof(bucket->hb_keydata)/sizeof(bucket->hb_keydata[0])]; - } else { - end = &bucket->hb_keydata[bucket->hb_keys[index-1].keyoffset]; - } - - if (start == end) - return; - - /* fixup data */ - newstart = &bucket->hb_keydata[bucket->hb_keys[bucket->used-1].keyoffset]; - memmove(newstart+(end-start), newstart, start-newstart); - - /* fixup key pointers */ - for (i=index;i<bucket->used;i++) { - bucket->hb_keys[i].keyoffset += (end-start); - } - ibex_block_dirty((struct _block *)bucket); -} - -/* make room 'len' for the key 'index' */ -/* assumes key 'index' is already empty (0 length) */ -static void -hash_expand(struct _hashblock *bucket, int index, int len) -{ - int i; - char *end, *newstart; - - /* get start/end of area to zap */ - if (index == 0) { - end = &bucket->hb_keydata[sizeof(bucket->hb_keydata)/sizeof(bucket->hb_keydata[0])]; - } else { - end = &bucket->hb_keydata[bucket->hb_keys[index-1].keyoffset]; - } - - /* fixup data */ - newstart = &bucket->hb_keydata[bucket->hb_keys[bucket->used-1].keyoffset]; - memmove(newstart-len, newstart, end-newstart); - - /* fixup key pointers */ - for (i=index;i<bucket->used;i++) { - bucket->hb_keys[i].keyoffset -= len; - } - ibex_block_dirty((struct _block *)bucket); -} - -static void -hash_remove(struct _IBEXIndex *index, const char *key, int keylen) -{ - struct _hashroot *hashroot; - guint32 hash; - int hashentry; - blockid_t hashtable; - hashid_t hashbucket, hashprev; - struct _hashtableblock *table; - - g_assert(index != 0); - g_assert(index->root != 0); - - d(printf("removing hash %.*s\n", keylen, key)); - - /* truncate the key to the maximum size */ - if (keylen > MAX_KEYLEN) - keylen = MAX_KEYLEN; - - hashroot = (struct _hashroot *)ibex_block_read(index->blocks, index->root); - - /* find the table containing this entry */ - hash = hash_key(key, keylen) % hashroot->size; - hashtable = hashroot->table[hash / (BLOCK_SIZE/sizeof(blockid_t))]; - table = (struct _hashtableblock *)ibex_block_read(index->blocks, hashtable); - hashentry = hash % (BLOCK_SIZE/sizeof(blockid_t)); - /* and its bucket */ - hashbucket = table->buckets[hashentry]; - - /* go down the bucket chain, reading each entry till we are done ... */ - hashprev = 0; - while (hashbucket != 0) { - struct _hashblock *bucket; - char *start, *end; - int ind; - - d(printf(" checking bucket %d\n", hashbucket)); - - /* get the real bucket id from the hashbucket id */ - bucket = (struct _hashblock *)ibex_block_read(index->blocks, HASH_BLOCK(hashbucket)); - /* and get the key number within the block */ - ind = HASH_INDEX(hashbucket); - - g_assert(ind < bucket->used); - - start = &bucket->hb_keydata[bucket->hb_keys[ind].keyoffset]; - if (ind == 0) { - end = &bucket->hb_keydata[sizeof(bucket->hb_keydata)/sizeof(bucket->hb_keydata[0])]; - } else { - end = &bucket->hb_keydata[bucket->hb_keys[ind-1].keyoffset]; - } - if ( (end-start) == keylen - && memcmp(start, key, keylen) == 0) { - struct _hashblock *prevbucket; - - if (hashprev == 0) { - /* unlink from hash chain */ - table->buckets[hashentry] = bucket->hb_keys[HASH_INDEX(hashbucket)].next; - /* link into free list */ - bucket->hb_keys[HASH_INDEX(hashbucket)].next = hashroot->free; - hashroot->free = hashbucket; - /* compress away data */ - hash_compress(bucket, HASH_INDEX(hashbucket)); - ibex_block_dirty((struct _block *)bucket); - ibex_block_dirty((struct _block *)table); - ibex_block_dirty((struct _block *)hashroot); - } else { - prevbucket = (struct _hashblock *)ibex_block_read(index->blocks, HASH_BLOCK(hashprev)); - prevbucket->hb_keys[HASH_INDEX(hashprev)].next = - bucket->hb_keys[ind].next; - /* link into free list */ - bucket->hb_keys[ind].next = hashroot->free; - hashroot->free = hashbucket; - /* compress entry */ - hash_compress(bucket, ind); - ibex_block_dirty((struct _block *)bucket); - ibex_block_dirty((struct _block *)prevbucket); - ibex_block_dirty((struct _block *)hashroot); - } - return; - } - hashprev = hashbucket; - hashbucket = bucket->hb_keys[ind].next; - } -} - -/* set where the datablock is located */ -static void -hash_set_data_block(struct _IBEXIndex *index, hashid_t keyid, blockid_t blockid, blockid_t tail) -{ - struct _hashblock *bucket; - - d(printf("setting data block hash %d to %d tail %d\n", keyid, blockid, tail)); - - /* map to a block number */ - g_assert((blockid & (BLOCK_SIZE-1)) == 0); - blockid >>= BLOCK_BITS; - - bucket = (struct _hashblock *)ibex_block_read(index->blocks, HASH_BLOCK(keyid)); - if (bucket->hb_keys[HASH_INDEX(keyid)].root != blockid - || bucket->hb_keys[HASH_INDEX(keyid)].tail != tail) { - bucket->hb_keys[HASH_INDEX(keyid)].tail = tail; - bucket->hb_keys[HASH_INDEX(keyid)].root = blockid; - ibex_block_dirty((struct _block *)bucket); - } -} - -static blockid_t -hash_get_data_block(struct _IBEXIndex *index, hashid_t keyid, blockid_t *tail) -{ - struct _hashblock *bucket; - - d(printf("getting data block hash %d\n", keyid)); - - if (keyid == 0) { - if (tail) - *tail = 0; - return 0; - } - - bucket = (struct _hashblock *)ibex_block_read(index->blocks, HASH_BLOCK(keyid)); - if (tail) - *tail = bucket->hb_keys[HASH_INDEX(keyid)].tail; - return bucket->hb_keys[HASH_INDEX(keyid)].root << BLOCK_BITS; -} - -static hashid_t -hash_insert(struct _IBEXIndex *index, const char *key, int keylen) -{ - struct _hashroot *hashroot; - guint32 hash; - int hashentry; - blockid_t hashtable; - hashid_t hashbucket, keybucket, keyprev, keyfree; - struct _hashtableblock *table; - struct _hashblock *bucket; - int count; - - g_assert(index != 0); - g_assert(index->root != 0); - - /* truncate the key to the maximum size */ - if (keylen > MAX_KEYLEN) - keylen = MAX_KEYLEN; - - d(printf("inserting hash %.*s\n", keylen, key)); - - hashroot = (struct _hashroot *)ibex_block_read(index->blocks, index->root); - - /* find the table containing this entry */ - hash = hash_key(key, keylen) % hashroot->size; - hashtable = hashroot->table[hash / (BLOCK_SIZE/sizeof(blockid_t))]; - table = (struct _hashtableblock *)ibex_block_read(index->blocks, hashtable); - hashentry = hash % (BLOCK_SIZE/sizeof(blockid_t)); - /* and its bucket */ - hashbucket = table->buckets[hashentry]; - - /* now look for a free slot, first try the free list */ - /* but dont try too hard if our key is just too long ... so just scan upto - 4 blocks, but if we dont find a space, tough ... */ - keybucket = hashroot->free; - keyprev = 0; - count = 0; - while (keybucket && count<4) { - int space; - - d(printf(" checking free %d\n", keybucket)); - - /* read the bucket containing this free key */ - bucket = (struct _hashblock *)ibex_block_read(index->blocks, HASH_BLOCK(keybucket)); - - /* check if there is enough space for the key */ - space = &bucket->hb_keydata[bucket->hb_keys[bucket->used-1].keyoffset] - - (char *)&bucket->hb_keys[bucket->used]; - if (space >= keylen) { - hash_expand(bucket, HASH_INDEX(keybucket), keylen); - memcpy(&bucket->hb_keydata[bucket->hb_keys[HASH_INDEX(keybucket)].keyoffset], - key, keylen); - - /* check if there is free space still in this node, and there are no other empty blocks */ - keyfree = bucket->hb_keys[HASH_INDEX(keybucket)].next; - if ((space-keylen) >= KEY_THRESHOLD) { - int i; - int head = ARRAY_LEN(bucket->hb_keydata); - int found = FALSE; - - for (i=0;i<bucket->used;i++) { - if (bucket->hb_keys[i].keyoffset == head) { - /* already have a free slot in this block, leave it */ - found = TRUE; - break; - } - head = bucket->hb_keys[i].keyoffset; - } - if (!found) { - /* we should link in a new free slot for this node */ - bucket->hb_keys[bucket->used].next = bucket->hb_keys[HASH_INDEX(keybucket)].next; - bucket->hb_keys[bucket->used].keyoffset = bucket->hb_keys[bucket->used-1].keyoffset; - keyfree = HASH_KEY(HASH_BLOCK(keybucket), bucket->used); - bucket->used++; - } - } - /* link 'keyfree' back to the parent ... */ - if (keyprev == 0) { - hashroot->free = keyfree; - ibex_block_dirty((struct _block *)hashroot); - } else { - struct _hashblock *prevbucket; - prevbucket = (struct _hashblock *)ibex_block_read(index->blocks, HASH_BLOCK(keyprev)); - prevbucket->hb_keys[HASH_INDEX(keyprev)].next = keyfree; - ibex_block_dirty((struct _block *)prevbucket); - } - - /* link into the hash chain */ - bucket->hb_keys[HASH_INDEX(keybucket)].next = hashbucket; - bucket->hb_keys[HASH_INDEX(keybucket)].root = 0; - bucket->hb_keys[HASH_INDEX(keybucket)].tail = 0; - table->buckets[hashentry] = keybucket; - ibex_block_dirty((struct _block *)table); - ibex_block_dirty((struct _block *)bucket); - - d(printf(" new key id %d\n", keybucket)); - d(printf(" new free id %d\n", hashroot->free)); - - return keybucket; - } - - count++; - keyprev = keybucket; - keybucket = bucket->hb_keys[HASH_INDEX(keybucket)].next; - } - - /* else create a new block ... */ - keybucket = ibex_block_get(index->blocks); - bucket = (struct _hashblock *)ibex_block_read(index->blocks, keybucket); - - d(printf("creating new key bucket %d\n", keybucket)); - - memset(bucket, 0, sizeof(*bucket)); - - bucket->used = 2; - /* first block, is the new key */ - bucket->hb_keys[0].keyoffset = ARRAY_LEN(bucket->hb_keydata) - keylen; - memcpy(&bucket->hb_keydata[bucket->hb_keys[0].keyoffset], key, keylen); - bucket->hb_keys[0].next = hashbucket; - bucket->hb_keys[0].root = 0; - bucket->hb_keys[0].tail = 0; - - table->buckets[hashentry] = HASH_KEY(keybucket, 0); - - /* next block is a free block, link into free list */ - bucket->hb_keys[1].keyoffset = bucket->hb_keys[0].keyoffset; - bucket->hb_keys[1].next = hashroot->free; - hashroot->free = HASH_KEY(keybucket, 1); - - /* link new block into keys list */ - bucket->next = block_number(hashroot->keys); - hashroot->keys = keybucket; - - ibex_block_dirty((struct _block *)hashroot); - ibex_block_dirty((struct _block *)table); - ibex_block_dirty((struct _block *)bucket); - - d(printf(" new key id %d\n", HASH_KEY(keybucket, 0))); - d(printf(" new free id %d\n", hashroot->free)); - - return HASH_KEY(keybucket, 0); -} - -/* hash cursor functions */ -static struct _IBEXCursor * -hash_cursor_create(struct _IBEXIndex *idx) -{ - struct _HASHCursor *idc; - struct _hashroot *hashroot; - - idc = g_malloc(sizeof(*idc)); - idc->cursor.klass = &ibex_hash_cursor_class; - idc->cursor.index = idx; - idc->key = 0; - idc->index = 0; - - hashroot = (struct _hashroot *)ibex_block_read(idx->blocks, idx->root); - idc->size = hashroot->size; - idc->block = hashroot->keys; - - return &idc->cursor; -} - -static void -hash_cursor_close(struct _IBEXCursor *idc) -{ - g_free(idc); -} - -static guint32 -hash_cursor_next(struct _IBEXCursor *idc) -{ - struct _HASHCursor *hc = (struct _HASHCursor *)idc; - struct _hashblock *bucket; - - while (hc->block != 0) { - bucket = (struct _hashblock *)ibex_block_read(idc->index->blocks, hc->block); - while (hc->index < bucket->used) { - if (hash_info(bucket, hc->index) > 0) { - hc->key = HASH_KEY(hc->block, hc->index); - hc->index++; - if (hc->index == bucket->used) { - hc->index = 0; - hc->block = block_location(bucket->next); - } - return hc->key; - } - hc->index++; - } - hc->index = 0; - hc->block = block_location(bucket->next); - } - - return hc->block; -} - -static char * -hash_cursor_next_key(struct _IBEXCursor *idc, int *keylenptr) -{ - /* TODO: this could be made slightly mroe efficient going to the structs direct. - but i'm lazy today */ - return idc->index->klass->get_key(idc->index, idc->klass->next(idc), keylenptr); -} - -/* debug */ -void ibex_hash_dump(struct _IBEXIndex *index); -static void ibex_hash_dump_rec(struct _IBEXIndex *index, int *words, int *wordslen); - -void ibex_hash_dump(struct _IBEXIndex *index) -{ - int words = 0, wordslen=0; - - ibex_hash_dump_rec(index, &words, &wordslen); - - printf("Total words = %d, bytes = %d, ave length = %f\n", words, wordslen, (double)wordslen/(double)words); -} - - -static void -ibex_hash_dump_rec(struct _IBEXIndex *index, int *words, int *wordslen) -{ - int i; - struct _hashtableblock *table; - struct _hashblock *bucket; - struct _hashroot *hashroot; - blockid_t hashtable; - hashid_t hashbucket; - extern void ibex_diskarray_dump(struct _memcache *blocks, blockid_t head, blockid_t tail); - - - printf("Walking hash tree:\n"); - hashroot = (struct _hashroot *)ibex_block_read(index->blocks, index->root); - for (i=0;i<hashroot->size;i++) { - printf("Hash table chain: %d\n", i); - hashtable = hashroot->table[i / (BLOCK_SIZE/sizeof(blockid_t))]; - table = (struct _hashtableblock *)ibex_block_read(index->blocks, hashtable); - hashbucket = table->buckets[i % (BLOCK_SIZE/sizeof(blockid_t))]; - while (hashbucket) { - int len; - - *words = *words + 1; - - bucket = (struct _hashblock *)ibex_block_read(index->blocks, HASH_BLOCK(hashbucket)); - printf(" bucket %d: [used %d]", hashbucket, bucket->used); - if (HASH_INDEX(hashbucket) == 0) { - len = ARRAY_LEN(bucket->hb_keydata) - - bucket->hb_keys[HASH_INDEX(hashbucket)].keyoffset; - } else { - len = bucket->hb_keys[HASH_INDEX(hashbucket)-1].keyoffset - - bucket->hb_keys[HASH_INDEX(hashbucket)].keyoffset; - } - printf("'%.*s' = %d next=%d\n", len, &bucket->hb_keydata[bucket->hb_keys[HASH_INDEX(hashbucket)].keyoffset], - bucket->hb_keys[HASH_INDEX(hashbucket)].root, - bucket->hb_keys[HASH_INDEX(hashbucket)].next); - - *wordslen = *wordslen + len; - - ibex_diskarray_dump(index->blocks, - bucket->hb_keys[HASH_INDEX(hashbucket)].root << BLOCK_BITS, - bucket->hb_keys[HASH_INDEX(hashbucket)].tail); - - hashbucket = bucket->hb_keys[HASH_INDEX(hashbucket)].next; - } - /* make sure its still in the cache */ - hashroot = (struct _hashroot *)ibex_block_read(index->blocks, index->root); - } - - hashbucket = hashroot->free; - printf("Dumping free lists ..\n"); - while (hashbucket) { - printf(" %d", hashbucket); - bucket = (struct _hashblock *)ibex_block_read(index->blocks, HASH_BLOCK(hashbucket)); - hashbucket = bucket->hb_keys[HASH_INDEX(hashbucket)].next; - } - printf("\n"); -} - -#if 0 -int main(int argc, char **argv) -{ - struct _memcache *bc; - struct _IBEXIndex *hash; - int i; - - bc = ibex_block_cache_open("index.db", O_CREAT|O_RDWR, 0600); - hash = ibex_hash_class.create(bc, 1024); - for (i=0;i<10000;i++) { - char key[16]; - sprintf(key, "key %d", i); - ibex_hash_class.insert(hash, key, strlen(key)); - } - - for (i=500;i<1000;i++) { - char key[16]; - sprintf(key, "key %d", i); - ibex_hash_class.remove(hash, key, strlen(key)); - } - - for (i=500;i<1000;i++) { - char key[16]; - sprintf(key, "key %d", i); - ibex_hash_class.insert(hash, key, strlen(key)); - } - - - ibex_hash_dump(hash); - - for (i=0;i<2000;i++) { - char key[16], *lookup; - hashid_t keyid; - blockid_t root, tail; - - sprintf(key, "key %d", i); - keyid = ibex_hash_class.find(hash, key, strlen(key)); - lookup = ibex_hash_class.get_key(hash, keyid, 0); - root = ibex_hash_class.get_data(hash, keyid, &tail); - printf("key %s = %d = '%s' root:%d tail:%d \n", key, keyid, lookup, root, tail); - g_free(lookup); - } - - ibex_hash_class.close(hash); - ibex_block_cache_close(bc); - return 0; -} - -#endif diff --git a/libibex/ibex.h b/libibex/ibex.h deleted file mode 100644 index 03635e275d..0000000000 --- a/libibex/ibex.h +++ /dev/null @@ -1,106 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ -/* - * Copyright (C) 2000 Helix Code, Inc. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public License - * as published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with the Gnome Library; see the file COPYING.LIB. If not, - * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -#ifndef IBEX_H -#define IBEX_H - -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <glib.h> - -struct ibex; -typedef struct ibex ibex; - -/* All functions that can fail set errno and return NULL or -1 on - * failure. - */ - -/* Open the named ibex index file. If CREATE is true, create the file - * if it doesn't already exist. - */ -ibex *ibex_open (char *file, int flags, int mode); - -/* Write the ibex to disk. */ -int ibex_write (ibex *ib); - -/* only save if ibex has changed. */ -int ibex_save (ibex *ib); - -/* Write the ibex to disk if it has changed, and free all memory - * associated with it. - */ -int ibex_close (ibex *ib); - - - -/* Index the named file. (If the FILENAME is already in the index, - * remove the old copy. - */ -int ibex_index_file (ibex *ib, char *filename); - -/* Index LEN bytes off FD, using NAME as the filename in the index. - * (If NAME already exists in the index, this adds more data to it.) - */ -int ibex_index_fd (ibex *ib, char *name, int fd, size_t len); - -/* Like ibex_index_fd, but with a buffer rather than a file descriptor. - * The buffer does not need to be '\0'-terminated. If UNREAD is not - * NULL, then the indexer won't assume that the buffer ends on a word - * boundary, and will return (in UNREAD) the number of bytes from the - * end of the buffer that it didn't use, if any. - */ -int ibex_index_buffer (ibex *ib, char *name, char *buffer, - size_t len, size_t *unread); - -/* Remove entries for a given file from the index. (Most of the removal - * isn't actually done until the file is written out to disk, so this - * is very fast.) - */ -void ibex_unindex (ibex *ib, char *name); - -/* Rename a file in the index. (This is also fast.) */ -void ibex_rename (ibex *ib, char *oldfilename, char *newfilename); - - - -/* Find a word in the index. Returns an array of strings: the caller - * should free the array, but should not free or modify the strings. - */ -GPtrArray *ibex_find (ibex *ib, char *word); - -/* Find if a word is contained in a specific name reference. - */ -gboolean ibex_find_name (ibex *ib, char *name, char *word); - -/* has a file been indexed? - */ -gboolean ibex_contains_name(ibex *ib, char *name); - -/* Return all the files containing all of the words in the given - * array. Returned data is like with ibex_find. - */ -GPtrArray *ibex_find_all (ibex *ib, GPtrArray *words); - -/* Debug function, dumps the whole index tree, showing removed files as well */ -void ibex_dump_all (ibex *ib); - -#endif /* ! IBEX_H */ - diff --git a/libibex/ibex_block.c b/libibex/ibex_block.c deleted file mode 100644 index 7a5864ea32..0000000000 --- a/libibex/ibex_block.c +++ /dev/null @@ -1,313 +0,0 @@ - -#include <glib.h> - -#include <stdio.h> -#include <unicode.h> -#include <ctype.h> -#include <string.h> -#include <errno.h> - -#include "ibex_internal.h" - -#define d(x) - -static signed char utf8_trans[] = { - 'A', 'A', 'A', 'A', 'A', 'A', -1, 'C', 'E', 'E', 'E', 'E', 'I', 'I', - 'I', 'I', -2, 'N', 'O', 'O', 'O', 'O', 'O', '*', 'O', 'U', 'U', 'U', - 'U', 'Y', -3, -4, 'a', 'a', 'a', 'a', 'a', 'a', -5, 'c', 'e', 'e', - 'e', 'e', 'i', 'i', 'i', 'i', -6, 'n', 'o', 'o', 'o', 'o', 'o', '/', - 'o', 'u', 'u', 'u', 'u', 'y', -7, 'y', 'A', 'a', 'A', 'a', 'A', 'a', - 'C', 'c', 'C', 'c', 'C', 'c', 'C', 'c', 'D', 'd', 'D', 'd', 'E', 'e', - 'E', 'e', 'E', 'e', 'E', 'e', 'E', 'e', 'G', 'g', 'G', 'g', 'G', 'g', - 'G', 'g', 'H', 'h', 'H', 'h', 'I', 'i', 'I', 'i', 'I', 'i', 'I', 'i', - 'I', 'i', -8, -9, 'J', 'j', 'K', 'k', 'k', 'L', 'l', 'L', 'l', 'L', - 'l', 'L', 'l', 'L', 'l', 'N', 'n', 'N', 'n', 'N', 'n', 'n', -10, -11, - 'O', 'o', 'O', 'o', 'O', 'o', -12, -13, 'R', 'r', 'R', 'r', 'R', 'r', - 'S', 'r', 'S', 's', 'S', 's', 'S', 's', 'T', 't', 'T', 't', 'T', 't', - 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'W', 'w', - 'Y', 'y', 'Y', 'Z', 'z', 'Z', 'z', 'Z', 'z', 's' -}; - -static char *utf8_long_trans[] = { - "AE", "TH", "TH", "ss", "ae", "th", "th", "IJ", "ij", - "NG", "ng", "OE", "oe" -}; - -/* This is a bit weird. It takes pointers to the start and end (actually - * just past the end) of a UTF-8-encoded word, and a buffer at least 1 - * byte longer than the length of the word. It copies the word into the - * buffer in all lowercase without accents, and splits up ligatures. - * (Since any ligature would be a multi-byte character in UTF-8, splitting - * them into two US-ASCII characters won't overrun the buffer.) - * - * It is not safe to call this routine with bad UTF-8. - */ -static void -ibex_normalise_word(char *start, char *end, char *buf) -{ - unsigned char *s, *d; - unicode_char_t uc; - - s = (unsigned char *)start; - d = (unsigned char *)buf; - while (s < (unsigned char *)end) { - if (*s < 0x80) { - /* US-ASCII character: copy unless it's - * an apostrophe. - */ - if (*s != '\'') - *d++ = tolower (*s); - s++; - } else { - char *next = unicode_get_utf8 (s, &uc); - if (uc >= 0xc0 && uc < 0xc0 + sizeof (utf8_trans)) { - signed char ch = utf8_trans[uc - 0xc0]; - if (ch > 0) - *d++ = tolower (ch); - else { - *d++ = tolower (utf8_long_trans[-ch - 1][0]); - *d++ = tolower (utf8_long_trans[-ch - 1][1]); - } - s = next; - } else { - while (s < (unsigned char *)next) - *d++ = *s++; - } - } - } - *d = '\0'; -} - -enum { IBEX_ALPHA, IBEX_NONALPHA, IBEX_INVALID, IBEX_INCOMPLETE }; - -/* This incorporates parts of libunicode, because there's no way to - * force libunicode to not read past a certain point. - */ -static int -utf8_category (char *sp, char **snp, char *send) -{ - unsigned char *p = (unsigned char *)sp, **np = (unsigned char **)snp; - unsigned char *end = (unsigned char *)send; - - if (isascii (*p)) { - *np = p + 1; - if (isalpha (*p) || *p == '\'') - return IBEX_ALPHA; - return IBEX_NONALPHA; - } else { - unicode_char_t uc; - int more; - - if ((*p & 0xe0) == 0xc0) { - more = 1; - uc = *p & 0x1f; - } else if ((*p & 0xf0) == 0xe0) { - more = 2; - uc = *p & 0x0f; - } else if ((*p & 0xf8) == 0xf0) { - more = 3; - uc = *p & 0x07; - } else if ((*p & 0xfc) == 0xf8) { - more = 4; - uc = *p & 0x03; - } else if ((*p & 0xfe) == 0xfc) { - more = 5; - uc = *p & 0x01; - } else - return IBEX_INVALID; - - if (p + more > end) - return IBEX_INCOMPLETE; - - while (more--) { - if ((*++p & 0xc0) != 0x80) - return IBEX_INVALID; - uc <<= 6; - uc |= *p & 0x3f; - } - - *np = p + 1; - if (unicode_isalpha (uc)) - return IBEX_ALPHA; - else - return IBEX_NONALPHA; - } -} - -/** - * ibex_index_buffer: the lowest-level ibex indexing interface - * @ib: an ibex - * @name: the name of the file being indexed - * @buffer: a buffer containing data from the file - * @len: the length of @buffer - * @unread: an output argument containing the number of unread bytes - * - * This routine indexes up to @len bytes from @buffer into @ib. - * If @unread is NULL, the indexer assumes that the buffer ends on a - * word boundary, and will index all the way to the end of the - * buffer. If @unread is not NULL, and the buffer ends with an - * alphabetic character, the indexer will assume that the buffer has - * been cut off in the middle of a word, and return the number of - * un-indexed bytes at the end of the buffer in *@unread. The caller - * should then read in more data through whatever means it has - * and pass in the unread bytes from the original buffer, followed - * by the new data, on its next call. - * - * Return value: 0 on success, -1 on failure. - **/ -int -ibex_index_buffer (ibex *ib, char *name, char *buffer, size_t len, size_t *unread) -{ - char *p, *q, *nq, *end, *word; - int wordsiz, cat; - GHashTable *words = g_hash_table_new(g_str_hash, g_str_equal); - GPtrArray *wordlist = g_ptr_array_new(); - int i, ret=-1; - - if (unread) - *unread = 0; - - end = buffer + len; - wordsiz = 20; - word = g_malloc (wordsiz); - - p = buffer; - while (p < end) { - while (p < end) { - cat = utf8_category (p, &q, end); - if (cat != IBEX_NONALPHA) - break; - p = q; - } - if (p == end) { - goto done; - } else if (cat == IBEX_INVALID) { - goto error; - } else if (cat == IBEX_INCOMPLETE) - q = end; - - while (q < end) { - cat = utf8_category (q, &nq, end); - if (cat != IBEX_ALPHA) - break; - q = nq; - } - if (cat == IBEX_INVALID || - (cat == IBEX_INCOMPLETE && !unread)) { - goto error; - } else if (cat == IBEX_INCOMPLETE || (q == end && unread)) { - *unread = end - p; - goto done; - } - - if (wordsiz < q - p + 1) { - wordsiz = q - p + 1; - word = g_realloc (word, wordsiz); - } - ibex_normalise_word (p, q, word); - if (word[0]) { - if (g_hash_table_lookup(words, word) == 0) { - char *newword = g_strdup(word); - g_ptr_array_add(wordlist, newword); - g_hash_table_insert(words, newword, name); - } - } - p = q; - } -done: - d(printf("name %s count %d size %d\n", name, wordlist->len, len)); - if (!ib->predone) { - ib->words->klass->index_pre(ib->words); - ib->predone = TRUE; - } - ib->words->klass->add_list(ib->words, name, wordlist); - ret = 0; -error: - for (i=0;i<wordlist->len;i++) - g_free(wordlist->pdata[i]); - g_ptr_array_free(wordlist, TRUE); - g_hash_table_destroy(words); - g_free (word); - return ret; -} - - -ibex *ibex_open (char *file, int flags, int mode) -{ - ibex *ib; - - ib = g_malloc0(sizeof(*ib)); - ib->blocks = ibex_block_cache_open(file, flags, mode); - if (ib->blocks == 0) { - g_warning("create: Error occured?: %s\n", strerror(errno)); - g_free(ib); - return NULL; - } - /* FIXME: the blockcache or the wordindex needs to manage the other one */ - ib->words = ib->blocks->words; - - return ib; -} - -int ibex_save (ibex *ib) -{ - printf("syncing database\n"); - if (ib->predone) { - ib->words->klass->index_post(ib->words); - ib->predone = FALSE; - } - ib->words->klass->sync(ib->words); - /* FIXME: some return */ - ibex_block_cache_sync(ib->blocks); - return 0; -} - -int ibex_close (ibex *ib) -{ - int ret = 0; - - printf("closing database\n"); - - if (ib->predone) { - ib->words->klass->index_post(ib->words); - ib->predone = FALSE; - } - - ib->words->klass->close(ib->words); - ibex_block_cache_close(ib->blocks); - g_free(ib); - return ret; -} - -void ibex_unindex (ibex *ib, char *name) -{ - d(printf("trying to unindex '%s'\n", name)); - ib->words->klass->unindex_name(ib->words, name); -} - -GPtrArray *ibex_find (ibex *ib, char *word) -{ - char *normal; - int len; - - len = strlen(word); - normal = alloca(len+1); - ibex_normalise_word(word, word+len, normal); - return ib->words->klass->find(ib->words, normal); -} - -gboolean ibex_find_name (ibex *ib, char *name, char *word) -{ - char *normal; - int len; - - len = strlen(word); - normal = alloca(len+1); - ibex_normalise_word(word, word+len, normal); - return ib->words->klass->find_name(ib->words, name, normal); -} - -gboolean ibex_contains_name(ibex *ib, char *name) -{ - return ib->words->klass->contains_name(ib->words, name); -} diff --git a/libibex/ibex_db.c b/libibex/ibex_db.c deleted file mode 100644 index 1ef0b3d1bc..0000000000 --- a/libibex/ibex_db.c +++ /dev/null @@ -1,512 +0,0 @@ - -#include <glib.h> - -#include <db.h> -#include <stdio.h> -#include <unicode.h> -#include <ctype.h> - -#include "ibex_internal.h" - -#define d(x) - -/* - Uses 2 databases: - - names - HASH - lists which files are stored - words - BTREE - index words to files - -*/ - -static int -db_delete_name(DB *db, const char *name) -{ - DBC *cursor; - int err, namelen; - DBT key, data; - - printf("called to delete name %s\n", name); - return 0; - - err = db->cursor(db, NULL, &cursor, 0); - if (err != 0) { - printf("Error occured?: %s\n", db_strerror(err)); - return err; - } - - memset(&key, 0, sizeof(key)); - memset(&data, 0, sizeof(data)); - namelen = strlen(name); - - err = cursor->c_get(cursor, &key, &data, DB_FIRST); - while (err == 0) { - if (data.size == namelen && memcmp(data.data, name, namelen) == 0) { - d(printf("Found match, removing it\n")); - cursor->c_del(cursor, 0); - } else { - data.size = namelen; - data.data = (void *)name; - if (cursor->c_get(cursor, &key, &data, DB_GET_BOTH) == 0) { - d(printf("seek to match, removing it\n")); - cursor->c_del(cursor, 0); - } else { - d(printf("seek to match, not found\n")); - } - } - err = cursor->c_get(cursor, &key, &data, DB_NEXT_NODUP); - } - - cursor->c_close(cursor); - - return 0; -} - -static int -db_index_words(DB *db, char *name, char **words) -{ - DBT key, data; - int err = 0; - char *word; - - memset(&key, 0, sizeof(key)); - memset(&data, 0, sizeof(data)); - data.data = name; - data.size = strlen(name); - for (;(word=*words);words++) { - /* normalise word first ... */ - key.data = word; - key.size = strlen(word); - - err = db->put(db, NULL, &key, &data, 0); - if (err != 0) - printf("Error occured?: %s\n", db_strerror(err)); - } - - return err; -} - -static int -db_index_word(DB *db, char *name, char *word) -{ - DBT key, data; - int err = 0; - - memset(&key, 0, sizeof(key)); - memset(&data, 0, sizeof(data)); - data.data = name; - data.size = strlen(name); - key.data = word; - key.size = strlen(word); - - err = db->put(db, NULL, &key, &data, 0); - if (err != 0) - printf("Error occured?: %s\n", db_strerror(err)); - - return err; -} - -static GPtrArray * -db_find(DB *db, char *word) -{ - DBT key, data; - int err; - DBC *cursor; - GPtrArray *matches = g_ptr_array_new(); - - memset(&key, 0, sizeof(key)); - memset(&data, 0, sizeof(data)); - - err = db->cursor(db, NULL, &cursor, 0); - if (err != 0) { - printf("Error occured?: %s\n", db_strerror(err)); - return matches; - } - - memset(&key, 0, sizeof(key)); - memset(&data, 0, sizeof(data)); - - key.size = strlen(word); - key.data = word; - - err = cursor->c_get(cursor, &key, &data, DB_SET); - while (err == 0) { - char *name; - name = g_malloc(data.size+1); - memcpy(name, data.data, data.size); - name[data.size] = '\0'; - g_ptr_array_add(matches, name); - err = cursor->c_get(cursor, &key, &data, DB_NEXT_DUP); - } - if (err != DB_NOTFOUND) { - printf("Error occured?: %s\n", db_strerror(err)); - /* what to do? doesn't matter too much its just a search ... */ - } - - cursor->c_close(cursor); - - return matches; -} - -/* check that db contains key @word, optionally with contents @name */ -static gboolean -db_contains_word(DB *db, char *name, char *word) -{ - DBT key, data; - - memset(&key, 0, sizeof(key)); - memset(&data, 0, sizeof(data)); - - if (name != NULL) { - data.size = strlen(name); - data.data = name; - } - key.size = strlen(word); - key.data = word; - - return db->get(db, NULL, &key, &data, name?DB_GET_BOTH:DB_SET) == 0; -} - -static int -db_delete_word(DB *db, char *word) -{ - DBT key; - - memset(&key, 0, sizeof(key)); - key.size = strlen(word); - key.data = word; - return db->del(db, NULL, &key, 0); -} - - -static signed char utf8_trans[] = { - 'A', 'A', 'A', 'A', 'A', 'A', -1, 'C', 'E', 'E', 'E', 'E', 'I', 'I', - 'I', 'I', -2, 'N', 'O', 'O', 'O', 'O', 'O', '*', 'O', 'U', 'U', 'U', - 'U', 'Y', -3, -4, 'a', 'a', 'a', 'a', 'a', 'a', -5, 'c', 'e', 'e', - 'e', 'e', 'i', 'i', 'i', 'i', -6, 'n', 'o', 'o', 'o', 'o', 'o', '/', - 'o', 'u', 'u', 'u', 'u', 'y', -7, 'y', 'A', 'a', 'A', 'a', 'A', 'a', - 'C', 'c', 'C', 'c', 'C', 'c', 'C', 'c', 'D', 'd', 'D', 'd', 'E', 'e', - 'E', 'e', 'E', 'e', 'E', 'e', 'E', 'e', 'G', 'g', 'G', 'g', 'G', 'g', - 'G', 'g', 'H', 'h', 'H', 'h', 'I', 'i', 'I', 'i', 'I', 'i', 'I', 'i', - 'I', 'i', -8, -9, 'J', 'j', 'K', 'k', 'k', 'L', 'l', 'L', 'l', 'L', - 'l', 'L', 'l', 'L', 'l', 'N', 'n', 'N', 'n', 'N', 'n', 'n', -10, -11, - 'O', 'o', 'O', 'o', 'O', 'o', -12, -13, 'R', 'r', 'R', 'r', 'R', 'r', - 'S', 'r', 'S', 's', 'S', 's', 'S', 's', 'T', 't', 'T', 't', 'T', 't', - 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'W', 'w', - 'Y', 'y', 'Y', 'Z', 'z', 'Z', 'z', 'Z', 'z', 's' -}; - -static char *utf8_long_trans[] = { - "AE", "TH", "TH", "ss", "ae", "th", "th", "IJ", "ij", - "NG", "ng", "OE", "oe" -}; - -/* This is a bit weird. It takes pointers to the start and end (actually - * just past the end) of a UTF-8-encoded word, and a buffer at least 1 - * byte longer than the length of the word. It copies the word into the - * buffer in all lowercase without accents, and splits up ligatures. - * (Since any ligature would be a multi-byte character in UTF-8, splitting - * them into two US-ASCII characters won't overrun the buffer.) - * - * It is not safe to call this routine with bad UTF-8. - */ -static void -ibex_normalise_word(char *start, char *end, char *buf) -{ - unsigned char *s, *d; - unicode_char_t uc; - - s = (unsigned char *)start; - d = (unsigned char *)buf; - while (s < (unsigned char *)end) { - if (*s < 0x80) { - /* US-ASCII character: copy unless it's - * an apostrophe. - */ - if (*s != '\'') - *d++ = tolower (*s); - s++; - } else { - char *next = unicode_get_utf8 (s, &uc); - if (uc >= 0xc0 && uc < 0xc0 + sizeof (utf8_trans)) { - signed char ch = utf8_trans[uc - 0xc0]; - if (ch > 0) - *d++ = tolower (ch); - else { - *d++ = tolower (utf8_long_trans[-ch - 1][0]); - *d++ = tolower (utf8_long_trans[-ch - 1][1]); - } - s = next; - } else { - while (s < (unsigned char *)next) - *d++ = *s++; - } - } - } - *d = '\0'; -} - -enum { IBEX_ALPHA, IBEX_NONALPHA, IBEX_INVALID, IBEX_INCOMPLETE }; - -/* This incorporates parts of libunicode, because there's no way to - * force libunicode to not read past a certain point. - */ -static int -utf8_category (char *sp, char **snp, char *send) -{ - unsigned char *p = (unsigned char *)sp, **np = (unsigned char **)snp; - unsigned char *end = (unsigned char *)send; - - if (isascii (*p)) { - *np = p + 1; - if (isalpha (*p) || *p == '\'') - return IBEX_ALPHA; - return IBEX_NONALPHA; - } else { - unicode_char_t uc; - int more; - - if ((*p & 0xe0) == 0xc0) { - more = 1; - uc = *p & 0x1f; - } else if ((*p & 0xf0) == 0xe0) { - more = 2; - uc = *p & 0x0f; - } else if ((*p & 0xf8) == 0xf0) { - more = 3; - uc = *p & 0x07; - } else if ((*p & 0xfc) == 0xf8) { - more = 4; - uc = *p & 0x03; - } else if ((*p & 0xfe) == 0xfc) { - more = 5; - uc = *p & 0x01; - } else - return IBEX_INVALID; - - if (p + more > end) - return IBEX_INCOMPLETE; - - while (more--) { - if ((*++p & 0xc0) != 0x80) - return IBEX_INVALID; - uc <<= 6; - uc |= *p & 0x3f; - } - - *np = p + 1; - if (unicode_isalpha (uc)) - return IBEX_ALPHA; - else - return IBEX_NONALPHA; - } -} - -static void -do_insert_words(char *key, char *name, ibex *ib) -{ - db_index_word(ib->words, name, key); - g_free(key); -} - -static void -do_free_words(char *key, char *name, void *data) -{ - g_free(key); -} - -/** - * ibex_index_buffer: the lowest-level ibex indexing interface - * @ib: an ibex - * @name: the name of the file being indexed - * @buffer: a buffer containing data from the file - * @len: the length of @buffer - * @unread: an output argument containing the number of unread bytes - * - * This routine indexes up to @len bytes from @buffer into @ib. - * If @unread is NULL, the indexer assumes that the buffer ends on a - * word boundary, and will index all the way to the end of the - * buffer. If @unread is not NULL, and the buffer ends with an - * alphabetic character, the indexer will assume that the buffer has - * been cut off in the middle of a word, and return the number of - * un-indexed bytes at the end of the buffer in *@unread. The caller - * should then read in more data through whatever means it has - * and pass in the unread bytes from the original buffer, followed - * by the new data, on its next call. - * - * Return value: 0 on success, -1 on failure. - **/ -int -ibex_index_buffer (ibex *ib, char *name, char *buffer, size_t len, size_t *unread) -{ - char *p, *q, *nq, *end, *word; - int wordsiz, cat; - GHashTable *words = g_hash_table_new(g_str_hash, g_str_equal); - - if (unread) - *unread = 0; - - end = buffer + len; - wordsiz = 20; - word = g_malloc (wordsiz); - - p = buffer; - while (p < end) { - while (p < end) { - cat = utf8_category (p, &q, end); - if (cat != IBEX_NONALPHA) - break; - p = q; - } - if (p == end) { - goto done; - } else if (cat == IBEX_INVALID) { - goto error; - } else if (cat == IBEX_INCOMPLETE) - q = end; - - while (q < end) { - cat = utf8_category (q, &nq, end); - if (cat != IBEX_ALPHA) - break; - q = nq; - } - if (cat == IBEX_INVALID || - (cat == IBEX_INCOMPLETE && !unread)) { - goto error; - } else if (cat == IBEX_INCOMPLETE || (q == end && unread)) { - *unread = end - p; - goto done; - } - - if (wordsiz < q - p + 1) { - wordsiz = q - p + 1; - word = g_realloc (word, wordsiz); - } - ibex_normalise_word (p, q, word); - if (word[0]) { - if (g_hash_table_lookup(words, word) == 0) { - g_hash_table_insert(words, g_strdup(word), name); - } - } - p = q; - } -done: - /* FIXME: do this and inserts within a transaction */ - if (!db_contains_word(ib->names, NULL, name)) { - printf("adding '%s' to database\n", name); - db_index_word(ib->names, "", name); - } - g_hash_table_foreach(words, (GHFunc)do_insert_words, ib); - g_hash_table_destroy(words); - g_free (word); - return 0; -error: - g_hash_table_foreach(words, (GHFunc)do_free_words, NULL); - g_hash_table_destroy(words); - g_free (word); - return -1; -} - - -ibex *ibex_open (char *file, int flags, int mode) -{ - ibex *ib; - u_int32_t dbflags = 0; - int err; - - ib = g_malloc0(sizeof(*ib)); - err = db_create(&ib->words, NULL, 0); - if (err != 0) { - g_warning("create: Error occured?: %s\n", db_strerror(err)); - g_free(ib); - return NULL; - } - - err = ib->words->set_flags(ib->words, DB_DUP); - if (err != 0) { - g_warning("set flags: Error occured?: %s\n", db_strerror(err)); - ib->words->close(ib->words, 0); - g_free(ib); - return NULL; - } - - if (flags & O_CREAT) - dbflags |= DB_CREATE; - if (flags & O_EXCL) - dbflags |= DB_EXCL; - if (flags & O_RDONLY) - dbflags |= DB_RDONLY; - - /* 1MB cache size? */ - ib->words->set_cachesize(ib->words, 0, 1000000, 0); - - err = ib->words->open(ib->words, file, "words", DB_BTREE, dbflags, mode); - if (err != 0) { - printf("open: Error occured?: %s\n", db_strerror(err)); - ib->words->close(ib->words, 0); - g_free(ib); - return NULL; - } - - /* FIXME: check returns */ - err = db_create(&ib->names, NULL, 0); - err = ib->names->open(ib->names, file, "names", DB_HASH, dbflags, mode); - - return ib; -} - -int ibex_save (ibex *ib) -{ - printf("syncing database\n"); - ib->names->sync(ib->names, 0); - return ib->words->sync(ib->words, 0); -} - -int ibex_close (ibex *ib) -{ - int ret; - - printf("closing database\n"); - - ret = ib->names->close(ib->names, 0); - ret = ib->words->close(ib->words, 0); - g_free(ib); - return ret; -} - -void ibex_unindex (ibex *ib, char *name) -{ - printf("trying to unindex '%s'\n", name); - if (db_contains_word(ib->names, NULL, name)) { - /* FIXME: do within transaction? */ - db_delete_name(ib->words, name); - db_delete_word(ib->names, name); - } -} - -GPtrArray *ibex_find (ibex *ib, char *word) -{ - char *normal; - int len; - - len = strlen(word); - normal = alloca(len+1); - ibex_normalise_word(word, word+len, normal); - return db_find(ib->words, normal); -} - -gboolean ibex_find_name (ibex *ib, char *name, char *word) -{ - char *normal; - int len; - - len = strlen(word); - normal = alloca(len+1); - ibex_normalise_word(word, word+len, normal); - return db_contains_word(ib->words, name, normal); -} - -gboolean ibex_contains_name(ibex *ib, char *name) -{ - return db_contains_word(ib->names, NULL, name); -} diff --git a/libibex/ibex_internal.h b/libibex/ibex_internal.h deleted file mode 100644 index 0eb4b625ce..0000000000 --- a/libibex/ibex_internal.h +++ /dev/null @@ -1,32 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ -/* - * Copyright (C) 2000 Helix Code, Inc. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public License - * as published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with the Gnome Library; see the file COPYING.LIB. If not, - * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -#include <glib.h> - -#include "ibex.h" -#include "block.h" -#include "wordindex.h" - -struct ibex { - char *path; - struct _memcache *blocks; - struct _IBEXWord *words; - int predone; -}; diff --git a/libibex/index.h b/libibex/index.h deleted file mode 100644 index 0cef7948b3..0000000000 --- a/libibex/index.h +++ /dev/null @@ -1,103 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- - * - * Copyright (C) 2000 Helix Code, Inc. - * - * Authors: Michael Zucchi <notzed@helixcode.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public License - * as published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with the Gnome Library; see the file COPYING.LIB. If not, - * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -#ifndef _INDEX_H -#define _INDEX_H - -/* an indexing 'class' maps a key to 1 piece of info */ - -#define INDEX_STAT - -struct _IBEXCursor { - struct _IBEXCursorClass *klass; - struct _IBEXIndex *index; -}; - -struct _IBEXCursorClass { - void (*close)(struct _IBEXCursor *); - - guint32 (*next)(struct _IBEXCursor *); - char *(*next_key)(struct _IBEXCursor *, int *keylenptr); -}; - -struct _IBEXIndex { - struct _IBEXIndexClass *klass; - struct _memcache *blocks; - blockid_t root; /* root block of ondisk index data */ -#ifdef INDEX_STAT - int lookups; /* how many lookups */ - int lookup_total; /* how many blocks loaded for all lookups (hash chain depth) */ -#endif -}; - -struct _IBEXIndexClass { - - struct _IBEXIndex *(*create)(struct _memcache *bc, int size); - struct _IBEXIndex *(*open)(struct _memcache *bc, blockid_t root); - - int (*sync)(struct _IBEXIndex *); - int (*close)(struct _IBEXIndex *); - - /* lookup a key in the index, returns the keyid of this item, or 0 if not found */ - guint32 (*find)(struct _IBEXIndex *, const char *key, int keylen); - - /* remove a key from the index */ - void (*remove)(struct _IBEXIndex *, const char *key, int keylen); - - /* insert a new key into the index, the keyid is returned */ - guint32 (*insert)(struct _IBEXIndex *, const char *key, int keylen); - - /* get the key contents/key length from the keyid */ - char *(*get_key)(struct _IBEXIndex *, guint32 keyid, int *keylenptr); - - /* set the key contents based on the keyid */ - void (*set_data)(struct _IBEXIndex *, guint32 keyid, blockid_t datablock, blockid_t tail); - - /* get the key contents based on the keyid */ - blockid_t (*get_data)(struct _IBEXIndex *, guint32 keyid, blockid_t *tail); - - /* get a cursor for iterating over all contents */ - struct _IBEXCursor *(*get_cursor)(struct _IBEXIndex *); -}; - -/* a storage class, stores lists of lists of id's */ - -struct _IBEXStore { - struct _IBEXStoreClass *klass; - struct _memcache *blocks; -}; - -struct _IBEXStoreClass { - struct _IBEXStore *(*create)(struct _memcache *bc); - int (*sync)(struct _IBEXStore *store); - int (*close)(struct _IBEXStore *store); - - blockid_t (*add)(struct _IBEXStore *store, blockid_t *head, blockid_t *tail, nameid_t data); - blockid_t (*add_list)(struct _IBEXStore *store, blockid_t *head, blockid_t *tail, GArray *data); - blockid_t (*remove)(struct _IBEXStore *store, blockid_t *head, blockid_t *tail, nameid_t data); - void (*free)(struct _IBEXStore *store, blockid_t head, blockid_t tail); - - gboolean (*find)(struct _IBEXStore *store, blockid_t head, blockid_t tail, nameid_t data); - GArray *(*get)(struct _IBEXStore *store, blockid_t head, blockid_t tail); -}; - -#endif diff --git a/libibex/lookup.c b/libibex/lookup.c deleted file mode 100644 index 2d01dbf850..0000000000 --- a/libibex/lookup.c +++ /dev/null @@ -1,83 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ -/* - * Copyright (C) 2000 Helix Code Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -/* lookup.c: a simple client, part 2 */ - -#include <errno.h> -#include <stdio.h> -#include <string.h> -#include <unistd.h> - -#include "ibex.h" - -extern int optind; -extern char *optarg; - -static void -usage (void) -{ - fprintf (stderr, "Usage: lookup [-f indexfile] word ...\n"); - exit (1); -} - -int -main (int argc, char **argv) -{ - ibex *ib; - GPtrArray *ans, *words; - int opt, i; - char *file = "INDEX"; - - while ((opt = getopt (argc, argv, "f:")) != -1) { - switch (opt) { - case 'f': - file = optarg; - break; - - default: - usage (); - break; - } - } - argc -= optind; - argv += optind; - - if (argc == 0) - usage (); - - ib = ibex_open (file, O_RDWR|O_CREAT, 0600); - if (!ib) { - printf ("Couldn't open %s: %s\n", file, strerror (errno)); - exit (1); - } - - words = g_ptr_array_new (); - while (argc--) - g_ptr_array_add (words, argv[argc]); - - ans = ibex_find_all (ib, words); - if (ans) { - for (i = 0; i < ans->len; i++) - printf ("%s\n", (char *)g_ptr_array_index (ans, i)); - exit (0); - } else { - printf ("Nope.\n"); - exit (1); - } -} diff --git a/libibex/mkindex.c b/libibex/mkindex.c deleted file mode 100644 index 151dcecb2d..0000000000 --- a/libibex/mkindex.c +++ /dev/null @@ -1,84 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ -/* - * Copyright (C) 2000 Helix Code Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -/* mkindex.c: a simple client, part 1 */ - -#include <errno.h> -#include <stdio.h> -#include <string.h> -#include <unistd.h> - -#include "ibex.h" - -extern int optind; -extern char *optarg; - -static void -usage (void) -{ - fprintf (stderr, "Usage: mkindex [-f indexfile] file ...\n"); - exit (1); -} - -int -main (int argc, char **argv) -{ - ibex *ib; - int opt; - char *file = "INDEX"; - - while ((opt = getopt (argc, argv, "f:")) != -1) { - switch (opt) { - case 'f': - file = optarg; - break; - - default: - usage (); - break; - } - } - argc -= optind; - argv += optind; - - if (argc == 0) - usage (); - - ib = ibex_open (file, O_CREAT|O_RDWR, 0600); - if (!ib) { - fprintf (stderr, "Couldn't open index file %s: %s\n", - file, strerror (errno)); - exit (1); - } - - while (argc--) { - if (ibex_index_file (ib, argv[argc]) == -1) { - fprintf (stderr, "Couldn't index %s: %s\n", - argv[argc], strerror (errno)); - exit (1); - } - } - - if (ibex_close (ib) != 0) { - fprintf (stderr, "Failed to write index file %s: %s\n", - file, strerror (errno)); - exit (1); - } - exit (0); -} diff --git a/libibex/wordindex.c b/libibex/wordindex.c deleted file mode 100644 index 3cee391668..0000000000 --- a/libibex/wordindex.c +++ /dev/null @@ -1,646 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- - * - * Copyright (C) 2000 Helix Code, Inc. - * - * Authors: Michael Zucchi <notzed@helixcode.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public License - * as published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with the Gnome Library; see the file COPYING.LIB. If not, - * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -/* code to manage a word index */ -/* includes a cache for word index writes, - but not for name index writes (currently), or any reads. - -Note the word cache is only needed during indexing of lots -of words, and could then be discarded (:flush()). - -*/ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <unistd.h> - -#include <glib.h> - -#include "block.h" -#include "index.h" -#include "wordindex.h" - -#define d(x) - -/*#define WORDCACHE_SIZE (256)*/ -#define WORDCACHE_SIZE (4096) - -extern struct _IBEXStoreClass ibex_diskarray_class; -extern struct _IBEXIndexClass ibex_hash_class; - -/* need 2 types of hash key? - one that just stores the wordid / wordblock - and one that stores the filecount/files? -*/ - - -#define CACHE_FILE_COUNT (62) - -struct _wordcache { - struct _wordcache *next; - struct _wordcache *prev; - nameid_t wordid; /* disk wordid */ - blockid_t wordblock; /* head of disk list */ - blockid_t wordtail; /* and the tail data */ - short filecount; /* how many valid items in files[] */ - short filealloc; /* how much allocated space in files[] */ - union { - nameid_t *files; /* memory cache of files */ - nameid_t file0; /* if filecount == 1 && filealloc == 0, store directly */ - } file; - char word[1]; /* actual word follows */ -}; - -static void unindex_name(struct _IBEXWord *, const char *name); /* unindex all entries for name */ -static gboolean contains_name(struct _IBEXWord *, const char *name); /* index contains data for name */ -static GPtrArray *find(struct _IBEXWord *, const char *word); /* returns all matches for word */ -static gboolean find_name(struct _IBEXWord *, const char *name, const char *word); /* find if name contains word */ -static void add(struct _IBEXWord *, const char *name, const char *word); /* adds a single word to name (slow) */ -static void add_list(struct _IBEXWord *, const char *name, GPtrArray *words);/* adds a bunch of words to a given name */ -static int word_sync(struct _IBEXWord *idx); -static int word_flush(struct _IBEXWord *idx); -static int word_close(struct _IBEXWord *idx); -static void word_index_pre(struct _IBEXWord *idx); -static void word_index_post(struct _IBEXWord *idx); - -struct _IBEXWordClass ibex_word_index_class = { - word_sync, word_flush, word_close, - word_index_pre, word_index_post, - unindex_name, contains_name, - find, find_name, - add, add_list -}; - -/* this interface isn't the best, but it'll do for now */ -struct _IBEXWord * -ibex_create_word_index(struct _memcache *bc, blockid_t *wordroot, blockid_t *nameroot) -{ - struct _IBEXWord *idx; - - idx = g_malloc0(sizeof(*idx)); - idx->wordcache = g_hash_table_new(g_str_hash, g_str_equal); - ibex_list_new(&idx->wordnodes); - idx->wordcount = 0; - idx->klass = &ibex_word_index_class; - - /* we use the same block array storage for both indexes at the moment */ - idx->wordstore = ibex_diskarray_class.create(bc); - idx->namestore = idx->wordstore; - - /* but not the same indexes! */ - if (*wordroot) { - printf("opening wordindex root = %d\n", *wordroot); - idx->wordindex = ibex_hash_class.open(bc, *wordroot); - } else { - idx->wordindex = ibex_hash_class.create(bc, 2048); - *wordroot = idx->wordindex->root; - printf("creating wordindex root = %d\n", *wordroot); - } - if (*nameroot) { - printf("opening nameindex root = %d\n", *nameroot); - idx->nameindex = ibex_hash_class.open(bc, *nameroot); - } else { - idx->nameindex = ibex_hash_class.create(bc, 2048); - *nameroot = idx->nameindex->root; - printf("creating nameindex root = %d\n", *nameroot); - } - return idx; -} - -#if 1 -static void -cache_sanity(struct _wordcache *head) -{ - while (head->next) { - g_assert(head->filecount <= head->filealloc); - g_assert(strlen(head->word) != 0); - head = head->next; - } -} -#endif - -static void word_index_pre(struct _IBEXWord *idx) -{ -} - -static void word_index_post(struct _IBEXWord *idx) -{ -} - -/* unindex all entries for name */ -static void unindex_name(struct _IBEXWord *idx, const char *name) -{ - GArray *words; - int i; - nameid_t nameid, wordid; - blockid_t nameblock, wordblock, newblock, nametail, wordtail, newtail; - char *word; - struct _wordcache *cache; - - d(printf("unindexing %s\n", name)); - - /* lookup the hash key */ - nameid = idx->nameindex->klass->find(idx->nameindex, name, strlen(name)); - /* get the block for this key */ - nameblock = idx->nameindex->klass->get_data(idx->nameindex, nameid, &nametail); - /* and the data for this block */ - words = idx->namestore->klass->get(idx->namestore, nameblock, nametail); - /* walk it ... */ - for (i=0;i<words->len;i++) { - /* get the word */ - wordid = g_array_index(words, nameid_t, i); - d(printf(" word %d\n", wordid)); - /* get the data block */ - wordblock = idx->wordindex->klass->get_data(idx->wordindex, wordid, &wordtail); - /* clear this name from it */ - newblock = wordblock; - newtail = wordtail; - idx->wordstore->klass->remove(idx->wordstore, &newblock, &newtail, nameid); - if (newblock != wordblock || newtail != wordtail) - idx->wordindex->klass->set_data(idx->wordindex, wordid, newblock, newtail); - - /* now check the cache as well */ - word = idx->nameindex->klass->get_key(idx->wordindex, wordid, NULL); - if (word) { - cache = g_hash_table_lookup(idx->wordcache, word); - if (cache) { - /* its there, update our head/tail pointers */ - cache->wordblock = newblock; - cache->wordtail = newtail; - - /* now check that we have a data entry in it */ - if (cache->filealloc == 0 && cache->filecount == 1) { - if (cache->file.file0 == nameid) { - cache->filecount = 0; - } - } else { - int j; - - for (j=0;j<cache->filecount;j++) { - if (cache->file.files[j] == nameid) { - cache->file.files[j] = cache->file.files[cache->filecount-1]; - cache->filecount--; - break; - } - } - } - } - g_free(word); - } - } - g_array_free(words, TRUE); - - /* and remove name data and itself */ - idx->namestore->klass->free(idx->namestore, nameblock, nametail); - idx->nameindex->klass->remove(idx->nameindex, name, strlen(name)); -} - -/* index contains (any) data for name */ -static gboolean contains_name(struct _IBEXWord *idx, const char *name) -{ - return idx->nameindex->klass->find(idx->nameindex, name, strlen(name)) != 0; -} - -/* returns all matches for word */ -static GPtrArray *find(struct _IBEXWord *idx, const char *word) -{ - nameid_t wordid, nameid; - GPtrArray *res; - GArray *names; - int i; - char *new; - struct _wordcache *cache; - blockid_t wordblock, wordtail; - - res = g_ptr_array_new(); - - cache = g_hash_table_lookup(idx->wordcache, word); - if (cache) { - /* freshen cache entry if we touch it */ - ibex_list_remove((struct _listnode *)cache); - ibex_list_addtail(&idx->wordnodes, (struct _listnode *)cache); - wordid = cache->wordid; - wordblock = cache->wordblock; - wordtail = cache->wordtail; - } else { - /* lookup the hash key */ - wordid = idx->wordindex->klass->find(idx->wordindex, word, strlen(word)); - /* get the block for this key */ - wordblock = idx->wordindex->klass->get_data(idx->wordindex, wordid, &wordtail); - } - /* and the data for this block */ - names = idx->wordstore->klass->get(idx->wordstore, wordblock, wordtail); - /* .. including any memory-only data */ - if (cache) { - if (cache->filealloc == 0 && cache->filecount == 1) - g_array_append_val(names, cache->file.file0); - else - g_array_append_vals(names, cache->file.files, cache->filecount); - } - - /* walk it ... converting id's back to strings */ - g_ptr_array_set_size(res, names->len); - for (i=0;i<names->len;i++) { - nameid = g_array_index(names, nameid_t, i); - new = idx->nameindex->klass->get_key(idx->nameindex, nameid, NULL); - res->pdata[i] = new; - } - g_array_free(names, TRUE); - return res; -} - -/* find if name contains word */ -static gboolean find_name(struct _IBEXWord *idx, const char *name, const char *word) -{ - nameid_t wordid, nameid; - blockid_t nameblock, nametail; - struct _wordcache *cache; - int i; - - /* lookup the hash key for the name */ - nameid = idx->nameindex->klass->find(idx->nameindex, name, strlen(name)); - /* get the block for this name */ - nameblock = idx->nameindex->klass->get_data(idx->nameindex, nameid, &nametail); - - /* check if there is an in-memory cache for this word, check its file there first */ - cache = g_hash_table_lookup(idx->wordcache, word); - if (cache) { - /* freshen cache entry if we touch it */ - ibex_list_remove((struct _listnode *)cache); - ibex_list_addtail(&idx->wordnodes, (struct _listnode *)cache); - if (cache->filecount == 1 && cache->filealloc == 0) { - if (cache->file.file0 == nameid) - return TRUE; - } else { - for (i=0;i<cache->filecount;i++) { - if (cache->file.files[i] == nameid) - return TRUE; - } - } - /* not there? well we can use the wordid anyway */ - wordid = cache->wordid; - } else { - /* lookup the hash key for word */ - wordid = idx->wordindex->klass->find(idx->wordindex, word, strlen(word)); - } - - /* see if wordid is in nameblock */ - return idx->namestore->klass->find(idx->namestore, nameblock, nametail, wordid); -} - -/* cache helper functions */ -/* flush a cache entry to disk, and empty it out */ -static void -sync_cache_entry(struct _IBEXWord *idx, struct _wordcache *cache) -{ - GArray array; /* just use this as a header */ - blockid_t oldblock, oldtail; - - d(printf("syncing cache entry '%s' used %d\n", cache->word, cache->filecount)); - if (cache->filecount == 1 && cache->filealloc == 0) - array.data = (char *)&cache->file.file0; - else - array.data = (char *)cache->file.files; - array.len = cache->filecount; - oldblock = cache->wordblock; - oldtail = cache->wordtail; - idx->wordstore->klass->add_list(idx->wordstore, &cache->wordblock, &cache->wordtail, &array); - if (oldblock != cache->wordblock || oldtail != cache->wordtail) { - idx->wordindex->klass->set_data(idx->wordindex, cache->wordid, cache->wordblock, cache->wordtail); - } - cache->filecount = 0; -} - -/* create a new key in an index, returning its id and head block */ -static void -add_index_key(struct _IBEXIndex *wordindex, const char *word, nameid_t *wordid, blockid_t *wordblock, blockid_t *wordtail) -{ - /* initialise cache entry - id of word entry and head block */ - *wordid = wordindex->klass->find(wordindex, word, strlen(word)); - if (*wordid == 0) { - *wordid = wordindex->klass->insert(wordindex, word, strlen(word)); - *wordblock = 0; - *wordtail = 0; - } else { - *wordblock = wordindex->klass->get_data(wordindex, *wordid, wordtail); - } -} - -/* create a new key in a cached index (only word cache so far), flushing old keys - if too much space is being used */ -static struct _wordcache * -add_index_cache(struct _IBEXWord *idx, const char *word) -{ - struct _wordcache *cache; - - d(printf("adding %s to cache\n", word)); - - cache = g_hash_table_lookup(idx->wordcache, word); - if (cache == 0) { - /* see if we have to flush off the last entry */ - if (idx->wordcount >= WORDCACHE_SIZE) { - struct _wordcache *mincache; - int min, count=0; - /* remove last entry, and flush it */ - cache = (struct _wordcache *)idx->wordnodes.tailpred; - mincache = cache; - min = mincache->filecount; - - d(printf("flushing word from cache %s\n", cache->word)); - /* instead of just using the last entry, we try and find an entry with - with only 1 item (failing that, the smallest in the range we look at) */ - /* this could probably benefit greatly from a more sophisticated aging algorithm */ - while (cache->next && count < 100) { - if (cache->filecount == 1) { - mincache = cache; - break; - } - if (cache->filecount > 0 && cache->filecount < min) { - mincache = cache; - min = cache->filecount; - } - cache = cache->next; - count++; - } - ibex_list_remove((struct _listnode *)mincache); - g_hash_table_remove(idx->wordcache, mincache->word); - sync_cache_entry(idx, mincache); - if (mincache->filealloc) - g_free(mincache->file.files); - g_free(mincache); - idx->wordcount--; - } - cache = g_malloc0(sizeof(*cache)+strlen(word)); - /* initialise cache entry - id of word entry and head block */ - add_index_key(idx->wordindex, word, &cache->wordid, &cache->wordblock, &cache->wordtail); - /* other fields */ - strcpy(cache->word, word); - cache->filecount = 0; - g_hash_table_insert(idx->wordcache, cache->word, cache); - ibex_list_addhead(&idx->wordnodes, (struct _listnode *)cache); - idx->wordcount++; - } else { - /* move cache bucket ot the head of the cache list */ - ibex_list_remove((struct _listnode *)cache); - ibex_list_addhead(&idx->wordnodes, (struct _listnode *)cache); - } - return cache; -} - -/* adds a single word to name (slow) */ -static void add(struct _IBEXWord *idx, const char *name, const char *word) -{ - nameid_t nameid; - blockid_t nameblock, newblock, nametail, newtail; - struct _wordcache *cache; - - g_error("Dont use wordindex::add()"); - abort(); - - cache = add_index_cache(idx, word); - - /* get the nameid and block start for this name */ - add_index_key(idx->nameindex, name, &nameid, &nameblock, &nametail); - - /* check for repeats of the last name - dont add anything */ - if (cache->filecount == 1 && cache->filealloc == 0) { - if (cache->file.file0 == nameid) - return; - } else { - if (cache->file.files[cache->filecount] == nameid) - return; - } - - /* see if we are setting the first, drop it in the union */ - if (cache->filecount == 0 && cache->filealloc == 0) { - cache->file.file0 = nameid; - } else if (cache->filecount == 1 && cache->filealloc == 0) { - nameid_t saveid; - /* we need to allocate space for words */ - saveid = cache->file.file0; - cache->file.files = g_malloc(sizeof(cache->file.files[0]) * CACHE_FILE_COUNT); - /* this could possibly grow as needed, but i wont for now */ - cache->filealloc = CACHE_FILE_COUNT; - cache->file.files[0] = saveid; - cache->file.files[1] = nameid; - } else { - cache->file.files[cache->filecount] = nameid; - } - - cache->filecount++; - - /* if we are full, force a flush now */ - if (cache->filealloc && cache->filecount >= cache->filealloc) { - sync_cache_entry(idx, cache); - } - - newtail = nametail; - newblock = nameblock; - idx->namestore->klass->add(idx->namestore, &newblock, &newtail, cache->wordid); - if (newblock != nameblock || newtail != nametail) { - idx->nameindex->klass->set_data(idx->nameindex, nameid, newblock, newtail); - } -} - -/* adds a bunch of words to a given name */ -static void add_list(struct _IBEXWord *idx, const char *name, GPtrArray *words) -{ - int i; - GArray *data = g_array_new(0, 0, sizeof(nameid_t)); - blockid_t nameblock, newblock, nametail, newtail; - nameid_t nameid; - struct _wordcache *cache; - - d(printf("Adding words to name %s\n", name)); - - d(cache_sanity((struct _wordcache *)idx->wordnodes.head)); - - /* get the nameid and block start for this name */ - add_index_key(idx->nameindex, name, &nameid, &nameblock, &nametail); - - d(cache_sanity((struct _wordcache *)idx->wordnodes.head)); - - for (i=0;i<words->len;i++) { - char *word = words->pdata[i]; - - cache = add_index_cache(idx, word); - - /*d(cache_sanity((struct _wordcache *)idx->wordnodes.head));*/ - - /* check for duplicates; doesn't catch duplicates over an overflow boundary. Watch me care. */ - if (cache->filecount == 0 - /* the 1 item case */ - || (cache->filecount == 1 && cache->filealloc == 0 && cache->file.file0 != nameid) - /* the normal case */ - || (cache->filealloc > 0 && cache->file.files[cache->filecount-1] != nameid)) { - - /* see if we are setting the first, drop it in the union */ - if (cache->filecount == 0 && cache->filealloc == 0) { - cache->file.file0 = nameid; - } else if (cache->filecount == 1 && cache->filealloc == 0) { - nameid_t saveid; - /* we need to allocate space for words */ - saveid = cache->file.file0; - cache->file.files = g_malloc(sizeof(cache->file.files[0]) * CACHE_FILE_COUNT); - /* this could possibly grow as needed, but i wont for now */ - cache->filealloc = CACHE_FILE_COUNT; - cache->file.files[0] = saveid; - cache->file.files[1] = nameid; - } else { - cache->file.files[cache->filecount] = nameid; - } - - cache->filecount++; - - /* if we are full, force a flush now */ - if (cache->filealloc && cache->filecount >= cache->filealloc) { - sync_cache_entry(idx, cache); - } - - /*d(cache_sanity((struct _wordcache *)idx->wordnodes.head));*/ - - /* and append this wordid for this name in memory */ - g_array_append_val(data, cache->wordid); - } - - /*d(cache_sanity((struct _wordcache *)idx->wordnodes.head));*/ - } - - d(cache_sanity((struct _wordcache *)idx->wordnodes.head)); - - /* and append these word id's in one go */ - newblock = nameblock; - newtail = nametail; - idx->namestore->klass->add_list(idx->namestore, &newblock, &newtail, data); - if (newblock != nameblock || newtail != nametail) { - idx->nameindex->klass->set_data(idx->nameindex, nameid, newblock, newtail); - } - - d(cache_sanity((struct _wordcache *)idx->wordnodes.head)); - - g_array_free(data, TRUE); -} - -/* sync any in-memory data to disk */ -static int -word_sync(struct _IBEXWord *idx) -{ - /* we just flush also, save memory */ - word_flush(idx); - -#if 0 - struct _wordcache *cache = (struct _wordcache *)idx->wordnodes.head; - - while (cache->next) { - sync_cache_entry(idx, cache); - cache = cache->next; - } - - /*ibex_hash_dump(idx->wordindex);*/ - /*ibex_hash_dump(idx->nameindex);*/ -#endif - return 0; -} - -/* sync and flush any in-memory data to disk and free it */ -static int -word_flush(struct _IBEXWord *idx) -{ - struct _wordcache *cache = (struct _wordcache *)idx->wordnodes.head, *next; - extern int block_log; - int count= 0; - int used=0, wasted=0; - - block_log = 0; - - next = cache->next; - while (next) { - count++; - used += sizeof(struct _wordcache) + (cache->filealloc * sizeof(nameid_t)); - if (cache->filealloc) - wasted += (cache->filealloc-cache->filecount)*sizeof(nameid_t); - else - wasted += (1-cache->filecount) * sizeof(nameid_t); - - /*printf("syncing word %s\n", cache->word);*/ - sync_cache_entry(idx, cache); - g_hash_table_remove(idx->wordcache, cache->word); - if (cache->filealloc) - g_free(cache->file.files); - g_free(cache); - cache = next; - next = cache->next; - } - - printf("sync cache entries = %d\n used memory = %d\n wasted memory = %d\n", count, used, wasted); - - block_log = 0; - ibex_list_new(&idx->wordnodes); - idx->wordcount = 0; - return 0; -} - -static int word_close(struct _IBEXWord *idx) -{ - struct _wordcache *cache = (struct _wordcache *)idx->wordnodes.head, *next; - extern int block_log; - int count= 0; - int used=0, wasted=0; - - block_log = 0; - - next = cache->next; - while (next) { - count++; - used += sizeof(struct _wordcache) + (cache->filealloc * sizeof(nameid_t)); - if (cache->filealloc) - wasted += (cache->filealloc-cache->filecount)*sizeof(nameid_t); - else - wasted += (1-cache->filecount) * sizeof(nameid_t); - - /*printf("closing word %s\n", cache->word);*/ - sync_cache_entry(idx, cache); - if (cache->filealloc) - g_free(cache->file.files); - g_free(cache); - cache = next; - next = cache->next; - } - block_log = 0; - - printf("cache entries = %d\n used memory = %d\n wasted memory = %d\n", count, used, wasted); - - idx->namestore->klass->close(idx->namestore); - idx->nameindex->klass->close(idx->nameindex); - /*same as namestore: - idx->wordstore->klass->close(idx->wordstore);*/ - idx->wordindex->klass->close(idx->wordindex); - g_hash_table_destroy(idx->wordcache); - g_free(idx); - - return 0; -} diff --git a/libibex/wordindex.h b/libibex/wordindex.h deleted file mode 100644 index 353f4dddc6..0000000000 --- a/libibex/wordindex.h +++ /dev/null @@ -1,72 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- - * - * Copyright (C) 2000 Helix Code, Inc. - * - * Authors: Michael Zucchi <notzed@helixcode.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public License - * as published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with the Gnome Library; see the file COPYING.LIB. If not, - * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -#ifndef _WORDINDEX_H -#define _WORDINDEX_H - -#include <glib.h> - -#include "block.h" -#include "index.h" - -struct _IBEXWord; - -/* not used yet */ -typedef void (*IBEXNormaliseFunc)(char *source, int len, char *dest); - -struct _IBEXWordClass { - int (*sync)(struct _IBEXWord *); - int (*flush)(struct _IBEXWord *); - int (*close)(struct _IBEXWord *); - - void (*index_pre)(struct _IBEXWord *); /* get ready for doing a lot of indexing. may be a nop */ - void (*index_post)(struct _IBEXWord *); - - void (*unindex_name)(struct _IBEXWord *, const char *name); /* unindex all entries for name */ - gboolean (*contains_name)(struct _IBEXWord *, const char *name); /* index contains data for name */ - GPtrArray *(*find)(struct _IBEXWord *, const char *word); /* returns all matches for word */ - gboolean (*find_name)(struct _IBEXWord *, const char *name, const char *word); /* find if name contains word */ - void (*add)(struct _IBEXWord *, const char *name, const char *word); /* adds a single word to name */ - void (*add_list)(struct _IBEXWord *, const char *name, GPtrArray *words);/* adds a bunch of words to a given name */ -}; - -struct _IBEXWord { - struct _IBEXWordClass *klass; - struct _IBEXStore *wordstore; - struct _IBEXIndex *wordindex; - struct _IBEXStore *namestore; - struct _IBEXIndex *nameindex; - - /* word caching info (should probably be modularised) */ - GHashTable *wordcache; /* word->struct _wordcache mapping */ - struct _list wordnodes; /* LRU list of wordcache structures */ - int wordcount; /* how much space used in cache */ - int precount; -}; - - -struct _IBEXWord *ibex_create_word_index(struct _memcache *bc, blockid_t *wordroot, blockid_t *nameroot); - -/* alternate implemenation */ -struct _IBEXWord *ibex_create_word_index_mem(struct _memcache *bc, blockid_t *wordroot, blockid_t *nameroot); - -#endif /* !_WORDINDEX_H */ diff --git a/libibex/wordindexmem.c b/libibex/wordindexmem.c deleted file mode 100644 index f0cc7336f8..0000000000 --- a/libibex/wordindexmem.c +++ /dev/null @@ -1,721 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- - * - * Copyright (C) 2000 Helix Code, Inc. - * - * Authors: Michael Zucchi <notzed@helixcode.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public License - * as published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with the Gnome Library; see the file COPYING.LIB. If not, - * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -/* this is the same as wordindex.c, but it doesn't have an LRU cache - for word names. it has a lookup tab le that is only loaded if - index-pre is called, otherwise it always hits disk */ - -/* code to manage a word index */ -/* includes a cache for word index writes, - but not for name index writes (currently), or any reads. - -Note the word cache is only needed during indexing of lots -of words, and could then be discarded (:flush()). - -*/ - -#include <stdio.h> - -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <unistd.h> - -#include <glib.h> - -#include "block.h" -#include "index.h" -#include "wordindex.h" - -/*#define MALLOC_CHECK*/ - -#ifdef MALLOC_CHECK -#include <mcheck.h> -#endif - -#define d(x) - -/*#define WORDCACHE_SIZE (256)*/ -#define WORDCACHE_SIZE (4096) - -extern struct _IBEXStoreClass ibex_diskarray_class; -extern struct _IBEXIndexClass ibex_hash_class; - -/* need 2 types of hash key? - one that just stores the wordid / wordblock - and one that stores the filecount/files? -*/ - - -#define CACHE_FILE_COUNT (62) - -struct _wordcache { - nameid_t wordid; /* disk wordid */ - blockid_t wordblock; /* head of disk list */ - blockid_t wordtail; /* and the tail data */ - short filecount; /* how many valid items in files[] */ - short filealloc; /* how much allocated space in files[] */ - union { - nameid_t *files; /* memory cache of files */ - nameid_t file0; /* if filecount == 1 && filealloc == 0, store directly */ - } file; - char word[1]; /* actual word follows */ -}; - -static void unindex_name(struct _IBEXWord *, const char *name); /* unindex all entries for name */ -static gboolean contains_name(struct _IBEXWord *, const char *name); /* index contains data for name */ -static GPtrArray *find(struct _IBEXWord *, const char *word); /* returns all matches for word */ -static gboolean find_name(struct _IBEXWord *, const char *name, const char *word); /* find if name contains word */ -static void add(struct _IBEXWord *, const char *name, const char *word); /* adds a single word to name (slow) */ -static void add_list(struct _IBEXWord *, const char *name, GPtrArray *words);/* adds a bunch of words to a given name */ -static int word_sync(struct _IBEXWord *idx); -static int word_flush(struct _IBEXWord *idx); -static int word_close(struct _IBEXWord *idx); -static void word_index_pre(struct _IBEXWord *idx); -static void word_index_post(struct _IBEXWord *idx); - -static void sync_cache_entry(struct _IBEXWord *idx, struct _wordcache *cache); - -struct _IBEXWordClass ibex_word_index_mem_class = { - word_sync, word_flush, word_close, - word_index_pre, word_index_post, - unindex_name, contains_name, - find, find_name, - add, add_list -}; - -#ifdef MALLOC_CHECK -static void -checkmem(void *p) -{ - if (p) { - int status = mprobe(p); - - switch (status) { - case MCHECK_HEAD: - printf("Memory underrun at %p\n", p); - abort(); - case MCHECK_TAIL: - printf("Memory overrun at %p\n", p); - abort(); - case MCHECK_FREE: - printf("Double free %p\n", p); - abort(); - } - } -} -#endif - -/* this interface isn't the best, but it'll do for now */ -struct _IBEXWord * -ibex_create_word_index_mem(struct _memcache *bc, blockid_t *wordroot, blockid_t *nameroot) -{ - struct _IBEXWord *idx; - - idx = g_malloc0(sizeof(*idx)); - idx->wordcache = g_hash_table_new(g_str_hash, g_str_equal); - ibex_list_new(&idx->wordnodes); - idx->wordcount = 0; - idx->precount = 0; - idx->klass = &ibex_word_index_mem_class; - - /* we use the same block array storage for both indexes at the moment */ - idx->wordstore = ibex_diskarray_class.create(bc); - idx->namestore = idx->wordstore; - - /* but not the same indexes! */ - if (*wordroot) { - printf("opening wordindex root = %d\n", *wordroot); - idx->wordindex = ibex_hash_class.open(bc, *wordroot); - } else { - idx->wordindex = ibex_hash_class.create(bc, 2048); - *wordroot = idx->wordindex->root; - printf("creating wordindex root = %d\n", *wordroot); - } - if (*nameroot) { - printf("opening nameindex root = %d\n", *nameroot); - idx->nameindex = ibex_hash_class.open(bc, *nameroot); - } else { - idx->nameindex = ibex_hash_class.create(bc, 2048); - *nameroot = idx->nameindex->root; - printf("creating nameindex root = %d\n", *nameroot); - } - return idx; -} - -static void -node_sanity(char *key, struct _wordcache *node, void *data) -{ - g_assert(node->filecount <= node->filealloc || (node->filecount == 1 && node->filealloc == 0)); - g_assert(strlen(node->word) != 0); -#ifdef MALLOC_CHECK - checkmem(node); - if (node->filealloc) - checkmem(node->file.files); -#endif -} - -static void -cache_sanity(struct _IBEXWord *idx) -{ -#ifdef MALLOC_CHECK - checkmem(idx); -#endif - g_hash_table_foreach(idx->wordcache, (GHFunc)node_sanity, idx); -} - -static void word_index_pre(struct _IBEXWord *idx) -{ - struct _IBEXCursor *idc; - struct _wordcache *cache; - nameid_t wordid; - char *key; - int len; - - idx->precount ++; - if (idx->precount > 1) - return; - - /* want to load all words into the cache lookup table */ - printf("pre-loading all word info into memory\n"); - idc = idx->wordindex->klass->get_cursor(idx->wordindex); - while ( (wordid = idc->klass->next(idc)) ) { - key = idc->index->klass->get_key(idc->index, wordid, &len); - /*d(printf("Adding word %s\n", key));*/ - cache = g_malloc0(sizeof(*cache) + strlen(key)); - strcpy(cache->word, key); - g_free(key); - cache->wordid = wordid; - cache->wordblock = idc->index->klass->get_data(idc->index, wordid, &cache->wordtail); - cache->filecount = 0; - cache->filealloc = 0; - g_hash_table_insert(idx->wordcache, cache->word, cache); - idx->wordcount++; - } - -#ifdef MALLOC_CHECK - cache_sanity(idx); -#endif - - idc->klass->close(idc); - - printf("done\n"); -} - -static gboolean -sync_free_value(void *key, void *value, void *data) -{ - struct _wordcache *cache = (struct _wordcache *)value; - struct _IBEXWord *idx = (struct _IBEXWord *)data; - - sync_cache_entry(idx, cache); - if (cache->filealloc) - g_free(cache->file.files); - g_free(cache); - - return TRUE; -} - -static void -sync_value(void *key, void *value, void *data) -{ - struct _wordcache *cache = (struct _wordcache *)value; - struct _IBEXWord *idx = (struct _IBEXWord *)data; - - sync_cache_entry(idx, cache); -} - -static void word_index_post(struct _IBEXWord *idx) -{ - idx->precount--; - if (idx->precount > 0) - return; - idx->precount = 0; - -#ifdef MALLOC_CHECK - cache_sanity(idx); -#endif - - g_hash_table_foreach_remove(idx->wordcache, sync_free_value, idx); - idx->wordcount = 0; -} - -/* unindex all entries for name */ -static void unindex_name(struct _IBEXWord *idx, const char *name) -{ - GArray *words; - int i; - nameid_t nameid, wordid; - blockid_t nameblock, wordblock, newblock, nametail, wordtail, newtail; - char *word; - struct _wordcache *cache; - - d(printf("unindexing %s\n", name)); - - /* lookup the hash key */ - nameid = idx->nameindex->klass->find(idx->nameindex, name, strlen(name)); - /* get the block for this key */ - nameblock = idx->nameindex->klass->get_data(idx->nameindex, nameid, &nametail); - /* and the data for this block */ - words = idx->namestore->klass->get(idx->namestore, nameblock, nametail); - /* walk it ... */ - for (i=0;i<words->len;i++) { - /* get the word */ - wordid = g_array_index(words, nameid_t, i); - d(printf(" word %d\n", wordid)); - /* get the data block */ - wordblock = idx->wordindex->klass->get_data(idx->wordindex, wordid, &wordtail); - /* clear this name from it */ - newblock = wordblock; - newtail = wordtail; - idx->wordstore->klass->remove(idx->wordstore, &newblock, &newtail, nameid); - if (newblock != wordblock || newtail != wordtail) - idx->wordindex->klass->set_data(idx->wordindex, wordid, newblock, newtail); - - /* now check the cache as well */ - word = idx->nameindex->klass->get_key(idx->wordindex, wordid, NULL); - if (word) { - cache = g_hash_table_lookup(idx->wordcache, word); - if (cache) { - /* its there, update our head/tail pointers */ - cache->wordblock = newblock; - cache->wordtail = newtail; - - /* now check that we have a data entry in it */ - if (cache->filealloc == 0 && cache->filecount == 1) { - if (cache->file.file0 == nameid) { - cache->filecount = 0; - } - } else { - int j; - - for (j=0;j<cache->filecount;j++) { - if (cache->file.files[j] == nameid) { - cache->file.files[j] = cache->file.files[cache->filecount-1]; - cache->filecount--; - break; - } - } - } - } - g_free(word); - } - } - g_array_free(words, TRUE); - - /* and remove name data and itself */ - idx->namestore->klass->free(idx->namestore, nameblock, nametail); - idx->nameindex->klass->remove(idx->nameindex, name, strlen(name)); -} - -/* index contains (any) data for name */ -static gboolean contains_name(struct _IBEXWord *idx, const char *name) -{ - return idx->nameindex->klass->find(idx->nameindex, name, strlen(name)) != 0; -} - -/* returns all matches for word */ -static GPtrArray *find(struct _IBEXWord *idx, const char *word) -{ - nameid_t wordid, nameid; - GPtrArray *res; - GArray *names; - int i; - char *new; - struct _wordcache *cache; - blockid_t wordblock, wordtail; - - res = g_ptr_array_new(); - - cache = g_hash_table_lookup(idx->wordcache, word); - if (cache) { -#if 0 - /* freshen cache entry if we touch it */ - ibex_list_remove((struct _listnode *)cache); - ibex_list_addtail(&idx->wordnodes, (struct _listnode *)cache); -#endif - wordid = cache->wordid; - wordblock = cache->wordblock; - wordtail = cache->wordtail; - } else { - /* lookup the hash key */ - wordid = idx->wordindex->klass->find(idx->wordindex, word, strlen(word)); - /* get the block for this key */ - wordblock = idx->wordindex->klass->get_data(idx->wordindex, wordid, &wordtail); - } - /* and the data for this block */ - names = idx->wordstore->klass->get(idx->wordstore, wordblock, wordtail); - /* .. including any memory-only data */ - if (cache) { - if (cache->filealloc == 0 && cache->filecount == 1) - g_array_append_val(names, cache->file.file0); - else - g_array_append_vals(names, cache->file.files, cache->filecount); - } - - /* walk it ... converting id's back to strings */ - g_ptr_array_set_size(res, names->len); - for (i=0;i<names->len;i++) { - nameid = g_array_index(names, nameid_t, i); - new = idx->nameindex->klass->get_key(idx->nameindex, nameid, NULL); - res->pdata[i] = new; - } - g_array_free(names, TRUE); - return res; -} - -/* find if name contains word */ -static gboolean find_name(struct _IBEXWord *idx, const char *name, const char *word) -{ - nameid_t wordid, nameid; - blockid_t nameblock, nametail; - struct _wordcache *cache; - int i; - - /* lookup the hash key for the name */ - nameid = idx->nameindex->klass->find(idx->nameindex, name, strlen(name)); - /* get the block for this name */ - nameblock = idx->nameindex->klass->get_data(idx->nameindex, nameid, &nametail); - - /* check if there is an in-memory cache for this word, check its file there first */ - cache = g_hash_table_lookup(idx->wordcache, word); - if (cache) { -#if 0 - /* freshen cache entry if we touch it */ - ibex_list_remove((struct _listnode *)cache); - ibex_list_addtail(&idx->wordnodes, (struct _listnode *)cache); -#endif - if (cache->filecount == 1 && cache->filealloc == 0) { - if (cache->file.file0 == nameid) - return TRUE; - } else { - for (i=0;i<cache->filecount;i++) { - if (cache->file.files[i] == nameid) - return TRUE; - } - } - /* not there? well we can use the wordid anyway */ - wordid = cache->wordid; - } else { - /* lookup the hash key for word */ - wordid = idx->wordindex->klass->find(idx->wordindex, word, strlen(word)); - } - - /* see if wordid is in nameblock */ - return idx->namestore->klass->find(idx->namestore, nameblock, nametail, wordid); -} - -/* cache helper functions */ -/* flush a cache entry to disk, and empty it out */ -static void -sync_cache_entry(struct _IBEXWord *idx, struct _wordcache *cache) -{ - GArray array; /* just use this as a header */ - blockid_t oldblock, oldtail; - - if (cache->filecount == 0) - return; - - d(printf("syncing cache entry '%s' used %d\n", cache->word, cache->filecount)); - if (cache->filecount == 1 && cache->filealloc == 0) - array.data = (char *)&cache->file.file0; - else - array.data = (char *)cache->file.files; - array.len = cache->filecount; - oldblock = cache->wordblock; - oldtail = cache->wordtail; - idx->wordstore->klass->add_list(idx->wordstore, &cache->wordblock, &cache->wordtail, &array); - if (oldblock != cache->wordblock || oldtail != cache->wordtail) { - idx->wordindex->klass->set_data(idx->wordindex, cache->wordid, cache->wordblock, cache->wordtail); - } - cache->filecount = 0; -} - -/* create a new key in an index, returning its id and head block */ -static void -add_index_key(struct _IBEXIndex *wordindex, const char *word, nameid_t *wordid, blockid_t *wordblock, blockid_t *wordtail) -{ - /* initialise cache entry - id of word entry and head block */ - *wordid = wordindex->klass->find(wordindex, word, strlen(word)); - - if (*wordid == 0) { - *wordid = wordindex->klass->insert(wordindex, word, strlen(word)); - *wordblock = 0; - *wordtail = 0; - } else { - *wordblock = wordindex->klass->get_data(wordindex, *wordid, wordtail); - } -} - -/* create a new key in a cached index (only word cache so far), flushing old keys - if too much space is being used */ -static struct _wordcache * -add_index_cache(struct _IBEXWord *idx, const char *word) -{ - struct _wordcache *cache; - - cache = g_hash_table_lookup(idx->wordcache, word); - if (cache == 0) { - /*d(printf("adding %s to cache\n", word));*/ - -#if 0 - /* see if we have to flush off the last entry */ - if (idx->wordcount >= WORDCACHE_SIZE) { - struct _wordcache *mincache; - int min, count=0; - /* remove last entry, and flush it */ - cache = (struct _wordcache *)idx->wordnodes.tailpred; - mincache = cache; - min = mincache->filecount; - - d(printf("flushing word from cache %s\n", cache->word)); - /* instead of just using the last entry, we try and find an entry with - with only 1 item (failing that, the smallest in the range we look at) */ - /* this could probably benefit greatly from a more sophisticated aging algorithm */ - while (cache->next && count < 100) { - if (cache->filecount == 1) { - mincache = cache; - break; - } - if (cache->filecount > 0 && cache->filecount < min) { - mincache = cache; - min = cache->filecount; - } - cache = cache->next; - count++; - } - ibex_list_remove((struct _listnode *)mincache); - g_hash_table_remove(idx->wordcache, mincache->word); - sync_cache_entry(idx, mincache); - if (mincache->filealloc) - g_free(mincache->file.files); - g_free(mincache); - idx->wordcount--; - } -#endif - cache = g_malloc0(sizeof(*cache)+strlen(word)); - /* if we're in an index state, we can assume we dont have it if we dont have it in memory */ - if (idx->precount == 0) { - /* initialise cache entry - id of word entry and head block */ - add_index_key(idx->wordindex, word, &cache->wordid, &cache->wordblock, &cache->wordtail); - } else { - cache->wordid = idx->wordindex->klass->insert(idx->wordindex, word, strlen(word)); - } - /* other fields */ - strcpy(cache->word, word); - cache->filecount = 0; - g_hash_table_insert(idx->wordcache, cache->word, cache); -#if 0 - ibex_list_addhead(&idx->wordnodes, (struct _listnode *)cache); -#endif - idx->wordcount++; - } else { - /*d(printf("already have %s in cache\n", word));*/ -#if 0 - /* move cache bucket ot the head of the cache list */ - ibex_list_remove((struct _listnode *)cache); - ibex_list_addhead(&idx->wordnodes, (struct _listnode *)cache); -#endif - } - return cache; -} - -/* adds a single word to name (slow) */ -static void add(struct _IBEXWord *idx, const char *name, const char *word) -{ - nameid_t nameid; - blockid_t nameblock, newblock, nametail, newtail; - struct _wordcache *cache; - - g_error("Dont use wordindex::add()"); - abort(); - - cache = add_index_cache(idx, word); - - /* get the nameid and block start for this name */ - add_index_key(idx->nameindex, name, &nameid, &nameblock, &nametail); - - /* check for repeats of the last name - dont add anything */ - if (cache->filecount == 1 && cache->filealloc == 0) { - if (cache->file.file0 == nameid) - return; - } else { - if (cache->file.files[cache->filecount] == nameid) - return; - } - - /* see if we are setting the first, drop it in the union */ - if (cache->filecount == 0 && cache->filealloc == 0) { - cache->file.file0 = nameid; - } else if (cache->filecount == 1 && cache->filealloc == 0) { - nameid_t saveid; - /* we need to allocate space for words */ - saveid = cache->file.file0; - cache->file.files = g_malloc(sizeof(cache->file.files[0]) * CACHE_FILE_COUNT); - /* this could possibly grow as needed, but i wont for now */ - cache->filealloc = CACHE_FILE_COUNT; - cache->file.files[0] = saveid; - cache->file.files[1] = nameid; - } else { - cache->file.files[cache->filecount] = nameid; - } - - cache->filecount++; - - /* if we are full, force a flush now */ - if (cache->filealloc && cache->filecount >= cache->filealloc) { - sync_cache_entry(idx, cache); - } - - newtail = nametail; - newblock = nameblock; - idx->namestore->klass->add(idx->namestore, &newblock, &newtail, cache->wordid); - if (newblock != nameblock || newtail != nametail) { - idx->nameindex->klass->set_data(idx->nameindex, nameid, newblock, newtail); - } -} - -/* adds a bunch of words to a given name */ -static void add_list(struct _IBEXWord *idx, const char *name, GPtrArray *words) -{ - int i; - GArray *data = g_array_new(0, 0, sizeof(nameid_t)); - blockid_t nameblock, newblock, nametail, newtail; - nameid_t nameid; - struct _wordcache *cache; - - d(printf("Adding words to name %s\n", name)); - - d(cache_sanity(idx)); - - /* get the nameid and block start for this name */ - add_index_key(idx->nameindex, name, &nameid, &nameblock, &nametail); - - d(cache_sanity(idx)); - - for (i=0;i<words->len;i++) { - char *word = words->pdata[i]; - - cache = add_index_cache(idx, word); - - /*d(cache_sanity(idx));*/ - - /* check for duplicates; doesn't catch duplicates over an overflow boundary. Watch me care. */ - if (cache->filecount == 0 - /* the 1 item case */ - || (cache->filecount == 1 && cache->filealloc == 0 && cache->file.file0 != nameid) - /* the normal case */ - || (cache->filealloc > 0 && cache->file.files[cache->filecount-1] != nameid)) { - - /* see if we are setting the first, drop it in the union */ - if (cache->filecount == 0 && cache->filealloc == 0) { - cache->file.file0 = nameid; - } else if (cache->filecount == 1 && cache->filealloc == 0) { - nameid_t saveid; - /* we need to allocate space for words */ - saveid = cache->file.file0; - cache->file.files = g_malloc(sizeof(cache->file.files[0]) * CACHE_FILE_COUNT); - /* this could possibly grow as needed, but i wont for now */ - cache->filealloc = CACHE_FILE_COUNT; - cache->file.files[0] = saveid; - cache->file.files[1] = nameid; - } else { - cache->file.files[cache->filecount] = nameid; - } - - cache->filecount++; - - /* if we are full, force a flush now */ - if (cache->filealloc && cache->filecount >= cache->filealloc) { - sync_cache_entry(idx, cache); - } - - /*d(cache_sanity(idx));*/ - - /* and append this wordid for this name in memory */ - g_array_append_val(data, cache->wordid); - } - - /*d(cache_sanity(idx));*/ - } - - d(cache_sanity(idx)); - - /* and append these word id's in one go */ - newblock = nameblock; - newtail = nametail; - idx->namestore->klass->add_list(idx->namestore, &newblock, &newtail, data); - if (newblock != nameblock || newtail != nametail) { - idx->nameindex->klass->set_data(idx->nameindex, nameid, newblock, newtail); - } - - d(cache_sanity(idx)); - - g_array_free(data, TRUE); -} - -/* sync any in-memory data to disk */ -static int -word_sync(struct _IBEXWord *idx) -{ - /* we just flush also, save memory */ - word_flush(idx); - -#if 0 - struct _wordcache *cache = (struct _wordcache *)idx->wordnodes.head; - - while (cache->next) { - sync_cache_entry(idx, cache); - cache = cache->next; - } - - /*ibex_hash_dump(idx->wordindex);*/ - /*ibex_hash_dump(idx->nameindex);*/ -#endif - return 0; -} - -/* sync and flush any in-memory data to disk and free it */ -static int -word_flush(struct _IBEXWord *idx) -{ - d(cache_sanity(idx)); - - g_hash_table_foreach_remove(idx->wordcache, sync_free_value, idx); - idx->wordcount = 0; - return 0; -} - -static int word_close(struct _IBEXWord *idx) -{ - idx->klass->flush(idx); - - idx->namestore->klass->close(idx->namestore); - idx->nameindex->klass->close(idx->nameindex); - /*same as namestore: - idx->wordstore->klass->close(idx->wordstore);*/ - idx->wordindex->klass->close(idx->wordindex); - g_hash_table_destroy(idx->wordcache); - g_free(idx); - - return 0; -} |