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-rw-r--r--camel/camel-stream-fs.c310
1 files changed, 0 insertions, 310 deletions
diff --git a/camel/camel-stream-fs.c b/camel/camel-stream-fs.c
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--- a/camel/camel-stream-fs.c
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-/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; fill-column: 160 -*- */
-/* camel-stream-fs.c : file system based stream */
-
-/*
- * Authors: Bertrand Guiheneuf <bertrand@helixcode.com>
- * Michael Zucchi <notzed@helixcode.com>
- *
- * Copyright 1999, 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-stream-fs.h"
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <string.h>
-
-static CamelSeekableStreamClass *parent_class = NULL;
-
-/* Returns the class for a CamelStreamFS */
-#define CSFS_CLASS(so) CAMEL_STREAM_FS_CLASS (GTK_OBJECT(so)->klass)
-
-static int stream_read (CamelStream *stream, char *buffer, unsigned int n);
-static int stream_write (CamelStream *stream, const char *buffer, unsigned int n);
-static int stream_flush (CamelStream *stream);
-static int stream_close (CamelStream *stream);
-static off_t stream_seek (CamelSeekableStream *stream, off_t offset,
- CamelStreamSeekPolicy policy);
-static void finalize (GtkObject *object);
-
-static void
-camel_stream_fs_class_init (CamelStreamFsClass *camel_stream_fs_class)
-{
- CamelSeekableStreamClass *camel_seekable_stream_class =
- CAMEL_SEEKABLE_STREAM_CLASS (camel_stream_fs_class);
- CamelStreamClass *camel_stream_class =
- CAMEL_STREAM_CLASS (camel_stream_fs_class);
- GtkObjectClass *gtk_object_class =
- GTK_OBJECT_CLASS (camel_stream_fs_class);
-
- parent_class = gtk_type_class (camel_seekable_stream_get_type ());
-
- /* virtual method overload */
- camel_stream_class->read = stream_read;
- camel_stream_class->write = stream_write;
- camel_stream_class->flush = stream_flush;
- camel_stream_class->close = stream_close;
-
- camel_seekable_stream_class->seek = stream_seek;
-
- gtk_object_class->finalize = finalize;
-}
-
-static void
-camel_stream_fs_init (gpointer object, gpointer klass)
-{
- CamelStreamFs *stream = CAMEL_STREAM_FS (object);
-
- stream->fd = -1;
-}
-
-GtkType
-camel_stream_fs_get_type (void)
-{
- static GtkType camel_stream_fs_type = 0;
-
- if (!camel_stream_fs_type) {
- GtkTypeInfo camel_stream_fs_info =
- {
- "CamelStreamFs",
- sizeof (CamelStreamFs),
- sizeof (CamelStreamFsClass),
- (GtkClassInitFunc) camel_stream_fs_class_init,
- (GtkObjectInitFunc) camel_stream_fs_init,
- /* reserved_1 */ NULL,
- /* reserved_2 */ NULL,
- (GtkClassInitFunc) NULL,
- };
-
- camel_stream_fs_type = gtk_type_unique (camel_seekable_stream_get_type (), &camel_stream_fs_info);
- }
-
- return camel_stream_fs_type;
-}
-
-static void
-finalize (GtkObject *object)
-{
- CamelStreamFs *stream_fs = CAMEL_STREAM_FS (object);
-
- if (stream_fs->fd != -1)
- close (stream_fs->fd);
-
- GTK_OBJECT_CLASS (parent_class)->finalize (object);
-}
-
-/**
- * camel_stream_fs_new_with_fd:
- * @fd: a file descriptor
- *
- * Returns a stream associated with the given file descriptor.
- * When the stream is destroyed, the file descriptor will be closed.
- *
- * Return value: the stream
- **/
-CamelStream *
-camel_stream_fs_new_with_fd (int fd)
-{
- CamelStreamFs *stream_fs;
- off_t offset;
-
- stream_fs = gtk_type_new (camel_stream_fs_get_type ());
- stream_fs->fd = fd;
- offset = lseek (fd, 0, SEEK_CUR);
- if (offset == -1)
- offset = 0;
- CAMEL_SEEKABLE_STREAM (stream_fs)->position = offset;
-
- return CAMEL_STREAM (stream_fs);
-}
-
-/**
- * camel_stream_fs_new_with_fd_and_bounds:
- * @fd: a file descriptor
- * @start: the first valid position in the file
- * @end: the first invalid position in the file, or CAMEL_STREAM_UNBOUND
- *
- * Returns a stream associated with the given file descriptor and bounds.
- * When the stream is destroyed, the file descriptor will be closed.
- *
- * Return value: the stream
- **/
-CamelStream *
-camel_stream_fs_new_with_fd_and_bounds (int fd, off_t start, off_t end)
-{
- CamelStream *stream;
-
- stream = camel_stream_fs_new_with_fd (fd);
- camel_seekable_stream_set_bounds (CAMEL_SEEKABLE_STREAM (stream), start, end);
-
- return stream;
-}
-
-/**
- * camel_stream_fs_new_with_name:
- * @name: a local filename
- * @flags: flags as in open(2)
- * @mode: a file mode
- *
- * Creates a new CamelStream corresponding to the named file, flags,
- * and mode.
- *
- * Return value: the stream, or #NULL on error.
- **/
-CamelStream *
-camel_stream_fs_new_with_name (const char *name, int flags, mode_t mode)
-{
- int fd;
-
- fd = open (name, flags, mode);
- if (fd == -1) {
- return NULL;
- }
-
- return camel_stream_fs_new_with_fd (fd);
-}
-
-/**
- * camel_stream_fs_new_with_name_and_bounds:
- * @name: a local filename
- * @flags: flags as in open(2)
- * @mode: a file mode
- * @start: the first valid position in the file
- * @end: the first invalid position in the file, or CAMEL_STREAM_UNBOUND
- *
- * Creates a new CamelStream corresponding to the given arguments.
- *
- * Return value: the stream, or NULL on error.
- **/
-CamelStream *
-camel_stream_fs_new_with_name_and_bounds (const char *name, int flags,
- mode_t mode, off_t start, off_t end)
-{
- CamelStream *stream;
-
- stream = camel_stream_fs_new_with_name (name, flags, mode);
- if (stream == NULL)
- return NULL;
-
- camel_seekable_stream_set_bounds (CAMEL_SEEKABLE_STREAM (stream),
- start, end);
-
- return stream;
-}
-
-
-static int
-stream_read (CamelStream *stream, char *buffer, unsigned int n)
-{
- CamelStreamFs *stream_fs = CAMEL_STREAM_FS (stream);
- CamelSeekableStream *seekable = CAMEL_SEEKABLE_STREAM (stream);
- int nread;
-
- if (seekable->bound_end != CAMEL_STREAM_UNBOUND)
- n = MIN (seekable->bound_end - seekable->position, n);
-
- do {
- nread = read (stream_fs->fd, buffer, n);
- } while (nread == -1 && errno == EINTR);
-
- if (nread > 0)
- seekable->position += nread;
- else if (nread == 0)
- stream->eos = TRUE;
-
- return nread;
-}
-
-static int
-stream_write (CamelStream *stream, const char *buffer, unsigned int n)
-{
- CamelStreamFs *stream_fs = CAMEL_STREAM_FS (stream);
- CamelSeekableStream *seekable = CAMEL_SEEKABLE_STREAM (stream);
- int v, written = 0;
-
- if (seekable->bound_end != CAMEL_STREAM_UNBOUND)
- n = MIN (seekable->bound_end - seekable->position, n);
-
- do {
- v = write (stream_fs->fd, buffer, n);
- if (v > 0)
- written += v;
- } while (v == -1 && errno == EINTR);
-
- if (written > 0)
- seekable->position += written;
- else if (v == -1)
- return -1;
-
- return written;
-}
-
-static int
-stream_flush (CamelStream *stream)
-{
- return fsync(((CamelStreamFs *)stream)->fd);
-}
-
-static int
-stream_close (CamelStream *stream)
-{
- return close(((CamelStreamFs *)stream)->fd);
-}
-
-static off_t
-stream_seek (CamelSeekableStream *stream, off_t offset, CamelStreamSeekPolicy policy)
-{
- CamelStreamFs *stream_fs = CAMEL_STREAM_FS (stream);
- off_t real = 0;
-
- switch (policy) {
- case CAMEL_STREAM_SET:
- real = offset;
- break;
- case CAMEL_STREAM_CUR:
- real = stream->position + offset;
- break;
- case CAMEL_STREAM_END:
- if (stream->bound_end != CAMEL_STREAM_UNBOUND) {
- real = lseek(stream_fs->fd, offset, SEEK_END);
- if (real != -1)
- stream->position = real;
- return real;
- }
- real = stream->bound_end + offset;
- break;
- }
-
- if (stream->bound_end != CAMEL_STREAM_UNBOUND)
- real = MIN (real, stream->bound_end);
- real = MAX (real, stream->bound_start);
-
- real = lseek(stream_fs->fd, real, SEEK_SET);
- if (real == -1)
- return -1;
-
- if (real != stream->position && ((CamelStream *)stream)->eos)
- ((CamelStream *)stream)->eos = FALSE;
-
- stream->position = real;
-
- return real;
-}
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