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authorDan Winship <danw@src.gnome.org>2000-08-09 08:07:56 +0800
committerDan Winship <danw@src.gnome.org>2000-08-09 08:07:56 +0800
commit234e613bc3293628516fc38ad6e695b02a8b11a4 (patch)
tree11d65634b9e003ae597d79d06157c2576cc58464
parentffaebb53febb7441ee7cfccaf3819a29efd702d7 (diff)
downloadgsoc2013-evolution-234e613bc3293628516fc38ad6e695b02a8b11a4.tar.gz
gsoc2013-evolution-234e613bc3293628516fc38ad6e695b02a8b11a4.tar.zst
gsoc2013-evolution-234e613bc3293628516fc38ad6e695b02a8b11a4.zip
New code to keep an on-disk cache of what UIDs have been seen in a folder.
* camel-uid-cache.c: New code to keep an on-disk cache of what UIDs have been seen in a folder. * camel-provider.h: Add new flags CAMEL_PROVIDER_IS_SOURCE (mail can arrive in it by non-Camel means) and CAMEL_PROVIDER_IS_STORAGE (you can work with mail directly without needing to copy it local). * providers/*/camel-*-provider.c: Add flags as needed: imap and mbox are SOURCE and STORAGE. mh and nntp are just STORAGE, pop3 is just SOURCE. * camel-mime-message.c (process_header): Add another subject g_strstrip that fejj's earlier commit missed. svn path=/trunk/; revision=4616
-rw-r--r--camel/ChangeLog11
-rw-r--r--camel/Makefile.am76
-rw-r--r--camel/camel-provider.h5
-rw-r--r--camel/camel-uid-cache.c186
-rw-r--r--camel/camel-uid-cache.h56
-rw-r--r--camel/camel.h1
-rw-r--r--camel/providers/imap/camel-imap-provider.c2
-rw-r--r--camel/providers/mbox/camel-mbox-provider.c2
-rw-r--r--camel/providers/mh/camel-mh-provider.c2
-rw-r--r--camel/providers/nntp/camel-nntp-provider.c2
-rw-r--r--camel/providers/pop3/camel-pop3-provider.c2
11 files changed, 303 insertions, 42 deletions
diff --git a/camel/ChangeLog b/camel/ChangeLog
index a7aa391b8d..55eae4be3b 100644
--- a/camel/ChangeLog
+++ b/camel/ChangeLog
@@ -1,5 +1,16 @@
2000-08-08 Dan Winship <danw@helixcode.com>
+ * camel-uid-cache.c: New code to keep an on-disk cache of what
+ UIDs have been seen in a folder.
+
+ * camel-provider.h: Add new flags CAMEL_PROVIDER_IS_SOURCE (mail
+ can arrive in it by non-Camel means) and CAMEL_PROVIDER_IS_STORAGE
+ (you can work with mail directly without needing to copy it local).
+
+ * providers/*/camel-*-provider.c: Add flags as needed: imap and
+ mbox are SOURCE and STORAGE. mh and nntp are just STORAGE, pop3 is
+ just SOURCE.
+
* camel-mime-message.c (process_header): Add another subject
g_strstrip that fejj's earlier commit missed.
diff --git a/camel/Makefile.am b/camel/Makefile.am
index 20d4193caa..a265d3a027 100644
--- a/camel/Makefile.am
+++ b/camel/Makefile.am
@@ -15,16 +15,27 @@ INCLUDES = -I.. -I$(srcdir)/.. -I$(includedir) \
-DG_LOG_DOMAIN=\"camel\"
libcamel_la_SOURCES = \
- camel.c \
+ broken-date-parser.c \
+ camel-address.c \
camel-data-wrapper.c \
camel-exception.c \
- camel-folder.c \
camel-folder-search.c \
camel-folder-summary.c \
+ camel-folder.c \
+ camel-internet-address.c \
camel-medium.c \
+ camel-mime-filter-basic.c \
+ camel-mime-filter-charset.c \
+ camel-mime-filter-crlf.c \
+ camel-mime-filter-from.c \
+ camel-mime-filter-index.c \
+ camel-mime-filter-save.c \
+ camel-mime-filter.c \
camel-mime-message.c \
- camel-mime-part.c \
+ camel-mime-parser.c \
camel-mime-part-utils.c \
+ camel-mime-part.c \
+ camel-mime-utils.c \
camel-movemail.c \
camel-multipart.c \
camel-object.c \
@@ -34,42 +45,44 @@ libcamel_la_SOURCES = \
camel-service.c \
camel-session.c \
camel-store.c \
- camel-stream.c \
camel-stream-buffer.c \
+ camel-stream-filter.c \
camel-stream-fs.c \
camel-stream-mem.c \
+ camel-stream.c \
camel-transport.c \
+ camel-uid-cache.c \
camel-url.c \
+ camel.c \
gmime-content-field.c \
gstring-util.c \
hash-table-utils.c \
md5-utils.c \
- string-utils.c \
- broken-date-parser.c \
- camel-mime-parser.c \
- camel-mime-utils.c \
- camel-mime-filter.c \
- camel-mime-filter-basic.c \
- camel-mime-filter-save.c \
- camel-mime-filter-charset.c \
- camel-mime-filter-index.c \
- camel-mime-filter-from.c \
- camel-mime-filter-crlf.c \
- camel-stream-filter.c \
- camel-address.c \
- camel-internet-address.c
+ string-utils.c
libcamelinclude_HEADERS = \
- camel.h \
+ broken-date-parser.h \
+ camel-address.h \
camel-data-wrapper.h \
+ camel-exception-list.def \
camel-exception.h \
- camel-folder.h \
camel-folder-search.h \
camel-folder-summary.h \
+ camel-folder.h \
+ camel-internet-address.h \
camel-medium.h \
+ camel-mime-filter-basic.h \
+ camel-mime-filter-charset.h \
+ camel-mime-filter-crlf.h \
+ camel-mime-filter-from.h \
+ camel-mime-filter-index.h \
+ camel-mime-filter-save.h \
+ camel-mime-filter.h \
camel-mime-message.h \
- camel-mime-part.h \
+ camel-mime-parser.h \
camel-mime-part-utils.h \
+ camel-mime-part.h \
+ camel-mime-utils.h \
camel-movemail.h \
camel-multipart.h \
camel-object.h \
@@ -79,32 +92,21 @@ libcamelinclude_HEADERS = \
camel-service.h \
camel-session.h \
camel-store.h \
- camel-stream.h \
camel-stream-buffer.h \
+ camel-stream-filter.h \
camel-stream-fs.h \
camel-stream-mem.h \
+ camel-stream.h \
camel-transport.h \
camel-types.h \
+ camel-uid-cache.h \
camel-url.h \
+ camel.h \
gmime-content-field.h \
gstring-util.h \
hash-table-utils.h \
md5-utils.h \
- string-utils.h \
- broken-date-parser.h \
- camel-exception-list.def \
- camel-mime-parser.h \
- camel-mime-utils.h \
- camel-mime-filter.h \
- camel-mime-filter-basic.h \
- camel-mime-filter-save.h \
- camel-mime-filter-charset.h \
- camel-mime-filter-index.h \
- camel-mime-filter-from.h \
- camel-mime-filter-crlf.h \
- camel-stream-filter.h \
- camel-address.h \
- camel-internet-address.h
+ string-utils.h
libcamel_la_LDFLAGS = -version-info 0:0:0 -rpath $(libdir)
diff --git a/camel/camel-provider.h b/camel/camel-provider.h
index 58d63a773e..4f2a67839f 100644
--- a/camel/camel-provider.h
+++ b/camel/camel-provider.h
@@ -48,7 +48,12 @@ typedef enum {
extern char *camel_provider_type_name[CAMEL_NUM_PROVIDER_TYPES];
+/* _IS_SOURCE means the user can get mail from there.
+ * _IS_STORAGE means the user can read mail from there.
+ */
#define CAMEL_PROVIDER_IS_REMOTE (1 << 0)
+#define CAMEL_PROVIDER_IS_SOURCE (1 << 1)
+#define CAMEL_PROVIDER_IS_STORAGE (1 << 2)
typedef struct {
/* Provider name used in CamelURLs. */
diff --git a/camel/camel-uid-cache.c b/camel/camel-uid-cache.c
new file mode 100644
index 0000000000..2b5faddb91
--- /dev/null
+++ b/camel/camel-uid-cache.c
@@ -0,0 +1,186 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* camel-uid-cache.c: UID caching code. */
+
+/*
+ * Authors:
+ * Dan Winship <danw@helixcode.com>
+ *
+ * Copyright 2000 Helix Code, Inc. (http://www.helixcode.com)
+ *
+ * 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
+ */
+
+#include "config.h"
+#include "camel-uid-cache.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+static void free_uid (gpointer key, gpointer value, gpointer data);
+static void maybe_write_uid (gpointer key, gpointer value, gpointer data);
+
+/**
+ * camel_uid_cache_new:
+ * @filename: path to load the cache from
+ *
+ * Creates a new UID cache, initialized from @filename. If @filename
+ * doesn't already exist, the UID cache will be empty. Otherwise, if
+ * it does exist but can't be read, the function will return %NULL.
+ *
+ * Return value: a new UID cache, or %NULL
+ **/
+CamelUIDCache *
+camel_uid_cache_new (const char *filename)
+{
+ CamelUIDCache *cache;
+ struct stat st;
+ char *buf, **uids;
+ int fd, i;
+
+ fd = open (filename, O_RDWR | O_CREAT, 0700);
+ if (fd == -1)
+ return NULL;
+
+ if (fstat (fd, &st) != 0) {
+ close (fd);
+ return NULL;
+ }
+ buf = g_malloc (st.st_size + 1);
+
+ if (read (fd, buf, st.st_size) == -1) {
+ close (fd);
+ g_free (buf);
+ return NULL;
+ }
+ buf[st.st_size] = '\0';
+
+ cache = g_new (CamelUIDCache, 1);
+ cache->fd = fd;
+ cache->level = 1;
+ cache->uids = g_hash_table_new (g_str_hash, g_str_equal);
+
+ uids = g_strsplit (buf, "\n", 0);
+ g_free (buf);
+ for (i = 0; uids[i]; i++) {
+ g_hash_table_insert (cache->uids, uids[i],
+ GINT_TO_POINTER (cache->level));
+ }
+ g_free (uids);
+
+ return cache;
+}
+
+/**
+ * camel_uid_cache_save:
+ * @cache: a CamelUIDCache
+ *
+ * Attempts to save @cache back to disk.
+ *
+ * Return value: success or failure
+ **/
+gboolean
+camel_uid_cache_save (CamelUIDCache *cache)
+{
+ if (lseek (cache->fd, 0, SEEK_SET) != 0)
+ return FALSE;
+ g_hash_table_foreach (cache->uids, maybe_write_uid, cache);
+ return ftruncate (cache->fd, lseek (cache->fd, 0, SEEK_CUR)) == 0;
+}
+
+static void
+maybe_write_uid (gpointer key, gpointer value, gpointer data)
+{
+ CamelUIDCache *cache = data;
+
+ if (GPOINTER_TO_INT (value) == cache->level) {
+ write (cache->fd, key, strlen (key));
+ write (cache->fd, "\n", 1);
+ }
+}
+
+/**
+ * camel_uid_cache_destroy:
+ * @cache: a CamelUIDCache
+ *
+ * Destroys @cache and frees its data.
+ **/
+void
+camel_uid_cache_destroy (CamelUIDCache *cache)
+{
+ g_hash_table_foreach (cache->uids, free_uid, NULL);
+ g_hash_table_destroy (cache->uids);
+ close (cache->fd);
+ g_free (cache);
+}
+
+static void
+free_uid (gpointer key, gpointer value, gpointer data)
+{
+ g_free (key);
+}
+
+/**
+ * camel_uid_cache_get_new_uids:
+ * @cache: a CamelUIDCache
+ * @uids: an array of UIDs
+ *
+ * Returns an array of UIDs from @uids that are not in @cache, and
+ * removes UIDs from @cache that aren't in @uids.
+ *
+ * Return value: an array of new UIDs, which must be freed with
+ * camel_uid_cache_free_uids().
+ **/
+GPtrArray *
+camel_uid_cache_get_new_uids (CamelUIDCache *cache, GPtrArray *uids)
+{
+ GPtrArray *new_uids;
+ char *uid;
+ int i;
+
+ new_uids = g_ptr_array_new ();
+ cache->level++;
+
+ for (i = 0; i < uids->len; i++) {
+ uid = uids->pdata[i];
+ if (g_hash_table_lookup (cache->uids, uid))
+ g_hash_table_remove (cache->uids, uid);
+ else
+ g_ptr_array_add (new_uids, g_strdup (uid));
+ g_hash_table_insert (cache->uids, g_strdup (uid),
+ GINT_TO_POINTER (cache->level));
+ }
+
+ return new_uids;
+}
+
+/**
+ * camel_uid_cache_free_uids:
+ * @uids: an array returned from camel_uid_cache_get_new_uids()
+ *
+ * Frees the array of UIDs.
+ **/
+void
+camel_uid_cache_free_uids (GPtrArray *uids)
+{
+ int i;
+
+ for (i = 0; i < uids->len; i++)
+ g_free (uids->pdata[i]);
+ g_ptr_array_free (uids, TRUE);
+}
diff --git a/camel/camel-uid-cache.h b/camel/camel-uid-cache.h
new file mode 100644
index 0000000000..92226a3afd
--- /dev/null
+++ b/camel/camel-uid-cache.h
@@ -0,0 +1,56 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* camel-uid-cache.h: UID caching code. */
+
+/*
+ * Authors:
+ * Bertrand Guiheneuf <bertrand@helixcode.com>
+ *
+ * Copyright 2000 Helix Code, Inc. (http://www.helixcode.com)
+ *
+ * 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
+ */
+
+#ifndef CAMEL_UID_CACHE_H
+#define CAMEL_UID_CACHE_H 1
+
+#ifdef __cplusplus
+extern "C" {
+#pragma }
+#endif /* __cplusplus */
+
+#include <glib.h>
+#include <stdio.h>
+
+typedef struct {
+ int fd, level;
+ GHashTable *uids;
+} CamelUIDCache;
+
+CamelUIDCache *camel_uid_cache_new (const char *filename);
+gboolean camel_uid_cache_save (CamelUIDCache *cache);
+void camel_uid_cache_destroy (CamelUIDCache *cache);
+
+GPtrArray *camel_uid_cache_get_new_uids (CamelUIDCache *cache,
+ GPtrArray *uids);
+void camel_uid_cache_free_uids (GPtrArray *uids);
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+
+#endif /* CAMEL_UID_CACHE_H */
diff --git a/camel/camel.h b/camel/camel.h
index e9300f83cb..752b145b49 100644
--- a/camel/camel.h
+++ b/camel/camel.h
@@ -62,6 +62,7 @@ extern "C" {
#include <camel/camel-stream-mem.h>
#include <camel/camel-stream.h>
#include <camel/camel-transport.h>
+#include <camel/camel-uid-cache.h>
#include <camel/camel-url.h>
#include <camel/gmime-content-field.h>
#include <camel/gstring-util.h>
diff --git a/camel/providers/imap/camel-imap-provider.c b/camel/providers/imap/camel-imap-provider.c
index b9d8c74847..21452d5cee 100644
--- a/camel/providers/imap/camel-imap-provider.c
+++ b/camel/providers/imap/camel-imap-provider.c
@@ -42,7 +42,7 @@ static CamelProvider imap_provider = {
"mail",
- 0,
+ CAMEL_PROVIDER_IS_REMOTE | CAMEL_PROVIDER_IS_SOURCE | CAMEL_PROVIDER_IS_STORAGE,
{ 0, 0 },
diff --git a/camel/providers/mbox/camel-mbox-provider.c b/camel/providers/mbox/camel-mbox-provider.c
index de206f18ef..d4048e1be3 100644
--- a/camel/providers/mbox/camel-mbox-provider.c
+++ b/camel/providers/mbox/camel-mbox-provider.c
@@ -38,7 +38,7 @@ static CamelProvider mbox_provider = {
"mail",
- 0,
+ CAMEL_PROVIDER_IS_SOURCE | CAMEL_PROVIDER_IS_STORAGE,
{ 0, 0 },
diff --git a/camel/providers/mh/camel-mh-provider.c b/camel/providers/mh/camel-mh-provider.c
index 6a0aaac492..58e97eed30 100644
--- a/camel/providers/mh/camel-mh-provider.c
+++ b/camel/providers/mh/camel-mh-provider.c
@@ -37,7 +37,7 @@ static CamelProvider mh_provider = {
"mail",
- 0,
+ CAMEL_PROVIDER_IS_STORAGE,
{0, 0},
diff --git a/camel/providers/nntp/camel-nntp-provider.c b/camel/providers/nntp/camel-nntp-provider.c
index abfce31c5e..8badba0e9c 100644
--- a/camel/providers/nntp/camel-nntp-provider.c
+++ b/camel/providers/nntp/camel-nntp-provider.c
@@ -36,7 +36,7 @@ static CamelProvider news_provider = {
"news",
- CAMEL_PROVIDER_IS_REMOTE,
+ CAMEL_PROVIDER_IS_REMOTE | CAMEL_PROVIDER_IS_STORAGE,
{ 0, 0 },
diff --git a/camel/providers/pop3/camel-pop3-provider.c b/camel/providers/pop3/camel-pop3-provider.c
index 4ccb06058f..52399c99ec 100644
--- a/camel/providers/pop3/camel-pop3-provider.c
+++ b/camel/providers/pop3/camel-pop3-provider.c
@@ -39,7 +39,7 @@ static CamelProvider pop3_provider = {
"mail",
- CAMEL_PROVIDER_IS_REMOTE,
+ CAMEL_PROVIDER_IS_REMOTE | CAMEL_PROVIDER_IS_SOURCE,
{ 0, 0 },