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-rw-r--r--camel/camel-stream-fs.c549
1 files changed, 0 insertions, 549 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 -*- */
-/* camel-stream-fs.c : file system based stream */
-
-/* inspired by gnome-stream-fs.c in bonobo by Miguel de Icaza */
-/*
- *
- * Author :
- * Bertrand Guiheneuf <bertrand@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>
-#include "camel-log.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 gint _read (CamelStream *stream, gchar *buffer, gint n);
-static gint _write (CamelStream *stream, const gchar *buffer, gint n);
-static void _flush (CamelStream *stream);
-static gboolean _available (CamelStream *stream);
-static gboolean _eos (CamelStream *stream);
-static void _close (CamelStream *stream);
-static gint _seek (CamelSeekableStream *stream, gint offset, CamelStreamSeekPolicy policy);
-
-static void _finalize (GtkObject *object);
-static void _destroy (GtkObject *object);
-
-static void _init_with_fd (CamelStreamFs *stream_fs, int fd);
-static void _init_with_fd_and_bounds (CamelStreamFs *stream_fs, int fd, guint32 inf_bound, gint32 sup_bound);
-static void _init_with_name (CamelStreamFs *stream_fs, const gchar *name, CamelStreamFsMode mode);
-static void _init_with_name_and_bounds (CamelStreamFs *stream_fs, const gchar *name, CamelStreamFsMode mode,
- guint32 inf_bound, gint32 sup_bound);
-
-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 definition */
- camel_stream_fs_class->init_with_fd = _init_with_fd;
- camel_stream_fs_class->init_with_fd_and_bounds = _init_with_fd_and_bounds;
- camel_stream_fs_class->init_with_name = _init_with_name;
- camel_stream_fs_class->init_with_name_and_bounds = _init_with_name_and_bounds;
-
- /* virtual method overload */
- camel_stream_class->read = _read;
- camel_stream_class->write = _write;
- camel_stream_class->flush = _flush;
- camel_stream_class->available = _available;
- camel_stream_class->eos = _eos;
- camel_stream_class->close = _close;
-
- camel_seekable_stream_class->seek = _seek;
-
- gtk_object_class->finalize = _finalize;
- gtk_object_class->destroy = _destroy;
-
-}
-
-static void
-camel_stream_fs_init (gpointer object, gpointer klass)
-{
- CamelStreamFs *stream = CAMEL_STREAM_FS (object);
-
- stream->name = NULL;
- stream->eof = FALSE;
-}
-
-
-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
-_destroy (GtkObject *object)
-{
- CamelStreamFs *stream_fs = CAMEL_STREAM_FS (object);
- gint close_error;
-
- CAMEL_LOG_FULL_DEBUG ("Entering CamelStreamFs::destroy\n");
-
- close_error = close (stream_fs->fd);
- if (close_error) {
- CAMEL_LOG_FULL_DEBUG ("CamelStreamFs::destroy Error while closing file descriptor\n");
- CAMEL_LOG_FULL_DEBUG ( " Full error text is : %s\n", strerror(errno));
- }
- GTK_OBJECT_CLASS (parent_class)->destroy (object);
-
- CAMEL_LOG_FULL_DEBUG ("Leaving CamelStreamFs::destroy\n");
-}
-
-
-static void
-_finalize (GtkObject *object)
-{
- CamelStreamFs *stream_fs = CAMEL_STREAM_FS (object);
-
-
- CAMEL_LOG_FULL_DEBUG ("Entering CamelStreamFs::finalize\n");
-
- g_free (stream_fs->name);
-
- GTK_OBJECT_CLASS (parent_class)->finalize (object);
- CAMEL_LOG_FULL_DEBUG ("Leaving CamelStreamFs::finalize\n");
-}
-
-
-
-static void
-_set_bounds (CamelStreamFs *stream_fs, guint32 inf_bound, guint32 sup_bound)
-{
-
- /* store the bounds */
- stream_fs->inf_bound = inf_bound;
- stream_fs->sup_bound = sup_bound;
-
- /* go to the first position */
- lseek (stream_fs->fd, inf_bound, SEEK_SET);
-
- CAMEL_SEEKABLE_STREAM (stream_fs)->cur_pos = 0;
-
- CAMEL_LOG_FULL_DEBUG ("In CamelStreamFs::_set_bounds (%p), "
- "setting inf bound to %u, "
- "sup bound to %ld, current postion to %u from %u\n",
- stream_fs,
- stream_fs->inf_bound, stream_fs->sup_bound,
- CAMEL_SEEKABLE_STREAM (stream_fs)->cur_pos, inf_bound);
-
-}
-
-
-
-
-static void
-_init_with_fd (CamelStreamFs *stream_fs, int fd)
-{
- stream_fs->fd = fd;
- stream_fs->inf_bound = 0;
- stream_fs->sup_bound = -1;
- CAMEL_SEEKABLE_STREAM (stream_fs)->cur_pos = 0;
-}
-
-
-
-
-static void
-_init_with_fd_and_bounds (CamelStreamFs *stream_fs, int fd, guint32 inf_bound, gint32 sup_bound)
-{
-
- CSFS_CLASS (stream_fs)->init_with_fd (stream_fs, fd);
- _set_bounds (stream_fs, inf_bound, sup_bound);
-
-}
-
-
-
-static void
-_init_with_name (CamelStreamFs *stream_fs, const gchar *name, CamelStreamFsMode mode)
-{
- struct stat s;
- int v, fd;
- int flags;
-
- g_assert (name);
- CAMEL_LOG_FULL_DEBUG ( "Entering CamelStream::new_with_name, name=\"%s\", mode=%d\n", name, mode);
-
-
- v = stat (name, &s);
-
- if (mode & CAMEL_STREAM_FS_READ){
- if (mode & CAMEL_STREAM_FS_WRITE)
- flags = O_RDWR | O_CREAT | O_NONBLOCK;
- else
- flags = O_RDONLY | O_NONBLOCK;
- } else {
- if (mode & CAMEL_STREAM_FS_WRITE)
- flags = O_WRONLY | O_CREAT | O_NONBLOCK;
- else
- return;
- }
-
- if ( (mode & CAMEL_STREAM_FS_READ) && !(mode & CAMEL_STREAM_FS_WRITE) )
- if (v == -1) {
- stream_fs->fd = -1;
- return;
- }
-
-
- fd = open (name, flags, 0600);
- if (fd==-1) {
- CAMEL_LOG_WARNING ( "CamelStreamFs::new_with_name can not obtain fd for file \"%s\"\n", name);
- CAMEL_LOG_FULL_DEBUG ( " Full error text is : %s\n", strerror(errno));
- return;
- }
-
- stream_fs->name = g_strdup (name);
- CSFS_CLASS (stream_fs)->init_with_fd (stream_fs, fd);
-
- gtk_signal_emit_by_name (GTK_OBJECT (stream_fs), "data_available");
-
-}
-
-
-
-static void
-_init_with_name_and_bounds (CamelStreamFs *stream_fs, const gchar *name, CamelStreamFsMode mode,
- guint32 inf_bound, gint32 sup_bound)
-{
- CSFS_CLASS (stream_fs)->init_with_name (stream_fs, name, mode);
- _set_bounds (stream_fs, inf_bound, (gint32)sup_bound);
- CAMEL_LOG_FULL_DEBUG ("In CamelStreamFs::init_with_name_and_bounds, "
- "setting inf bound to %u, "
- "sup bound to %ld, current postion to %u\n",
- stream_fs->inf_bound, stream_fs->sup_bound,
- CAMEL_SEEKABLE_STREAM (stream_fs)->cur_pos);
-}
-
-
-
-
-CamelStream *
-camel_stream_fs_new_with_name (const gchar *name, CamelStreamFsMode mode)
-{
- CamelStreamFs *stream_fs;
- stream_fs = gtk_type_new (camel_stream_fs_get_type ());
- CSFS_CLASS (stream_fs)->init_with_name (stream_fs, name, mode);
- if (stream_fs->fd == -1) {
- gtk_object_destroy (GTK_OBJECT (stream_fs));
- return NULL;
- }
-
- return CAMEL_STREAM (stream_fs);
-}
-
-
-CamelStream *
-camel_stream_fs_new_with_name_and_bounds (const gchar *name, CamelStreamFsMode mode,
- guint32 inf_bound, gint32 sup_bound)
-{
- CamelStreamFs *stream_fs;
- stream_fs = gtk_type_new (camel_stream_fs_get_type ());
- CSFS_CLASS (stream_fs)->init_with_name_and_bounds (stream_fs, name, mode, inf_bound, sup_bound);
-
- return CAMEL_STREAM (stream_fs);
-
-}
-
-
-
-
-
-
-CamelStream *
-camel_stream_fs_new_with_fd (int fd)
-{
- CamelStreamFs *stream_fs;
-
- CAMEL_LOG_FULL_DEBUG ( "Entering CamelStream::new_with_fd fd=%d\n",fd);
- stream_fs = gtk_type_new (camel_stream_fs_get_type ());
- CSFS_CLASS (stream_fs)->init_with_fd (stream_fs, fd);
-
-
- return CAMEL_STREAM (stream_fs);
-}
-
-
-
-CamelStream *
-camel_stream_fs_new_with_fd_and_bounds (int fd, guint32 inf_bound, gint32 sup_bound)
-{
- CamelStreamFs *stream_fs;
-
- CAMEL_LOG_FULL_DEBUG ( "Entering CamelStream::new_with_fd fd=%d\n",fd);
- stream_fs = gtk_type_new (camel_stream_fs_get_type ());
- CSFS_CLASS (stream_fs)->init_with_fd_and_bounds (stream_fs, fd, inf_bound, sup_bound);
-
- return CAMEL_STREAM (stream_fs);
-}
-
-
-
-/**
- * _read: read bytes from a stream
- * @stream: stream
- * @buffer: buffer where bytes are stored
- * @n: max number of bytes to read
- *
- *
- *
- * Return value: number of bytes actually read.
- **/
-static gint
-_read (CamelStream *stream, gchar *buffer, gint n)
-{
- CamelStreamFs *stream_fs = CAMEL_STREAM_FS (stream);
- gint v = 0;
- gint nb_to_read;
-
- g_assert (n);
-
- if (stream_fs->sup_bound != -1)
- nb_to_read = MIN (stream_fs->sup_bound - CAMEL_SEEKABLE_STREAM (stream)->cur_pos - stream_fs->inf_bound , n);
- else
- nb_to_read = n;
-
- do {
- v = read ( (CAMEL_STREAM_FS (stream))->fd, buffer, nb_to_read);
- } while (v == -1 && errno == EINTR);
-
- if (v<0)
- CAMEL_LOG_FULL_DEBUG ("CamelStreamFs::read v=%d\n", v);
- else
- CAMEL_SEEKABLE_STREAM (stream)->cur_pos += v;
-
- if (v == 0)
- stream_fs->eof = TRUE;
-
- return v;
-}
-
-
-/**
- * _write: write bytes to a stream
- * @stream: the stream
- * @buffer: byte buffer
- * @n: number of bytes to write
- *
- *
- *
- * Return value: the number of bytes actually written
- * in the stream.
- **/
-static gint
-_write (CamelStream *stream, const gchar *buffer, gint n)
-{
- CamelStreamFs *stream_fs = CAMEL_STREAM_FS (stream);
- int v;
- gint nb_bytes_written = 0;
-
- if (n <= 0)
- return 0;
-
- g_assert (stream);
- g_assert (stream_fs->fd);
- CAMEL_LOG_FULL_DEBUG ( "CamelStreamFs:: entering write. n=%d\n", n);
-
- /* we do not take the end bounds into account as it does not
- really make any sense in the case of a write operation */
- do {
- v = write ( stream_fs->fd, buffer, n);
- if (v>0) nb_bytes_written += v;
- } while (v == -1 && errno == EINTR);
-
-#if HARD_LOG_LEVEL >= FULL_DEBUG
- if (v==-1) {
- perror("");
- CAMEL_LOG_FULL_DEBUG ( "CamelStreamFs::write could not write bytes in stream\n");
- }
-#endif
-
- if (nb_bytes_written>0)
- CAMEL_SEEKABLE_STREAM (stream)->cur_pos += nb_bytes_written;
-
- return nb_bytes_written;
-
-}
-
-
-
-/**
- * _flush: flush pending changes
- * @stream: the stream
- *
- *
- **/
-static void
-_flush (CamelStream *stream)
-{
- fsync ((CAMEL_STREAM_FS (stream))->fd);
-}
-
-
-
-/**
- * _available: return the number of bytes available for reading
- * @stream: the stream
- *
- * Return the number of bytes available without blocking.
- *
- * Return value: the number of bytes available
- **/
-static gboolean
-_available (CamelStream *stream)
-{
- g_warning ("Not implemented yet");
- return FALSE;
-}
-
-
-/**
- * _eos: test if there are bytes left to read
- * @stream: the stream
- *
- *
- *
- * Return value: true if all stream has been read
- **/
-static gboolean
-_eos (CamelStream *stream)
-{
- CamelStreamFs *stream_fs = CAMEL_STREAM_FS (stream);
-
- g_assert (stream_fs);
- return stream_fs->eof;
-}
-
-
-/**
- * _close: close a stream
- * @stream: the stream
- *
- *
- **/
-static void
-_close (CamelStream *stream)
-{
- close ((CAMEL_STREAM_FS (stream))->fd);
-}
-
-
-static gint
-_seek (CamelSeekableStream *stream, gint offset, CamelStreamSeekPolicy policy)
-{
- int whence;
- gint return_position;
- gint real_offset;
- CamelStreamFs *stream_fs = CAMEL_STREAM_FS (stream);
-
-
- switch (policy) {
- case CAMEL_STREAM_SET:
- real_offset = MAX (stream_fs->inf_bound + offset, stream_fs->inf_bound);
- if (stream_fs->sup_bound > 0)
- real_offset = MIN (real_offset, stream_fs->sup_bound);
- whence = SEEK_SET;
- break;
-
- case CAMEL_STREAM_CUR:
- if ((stream_fs->sup_bound != -1) && ((CAMEL_SEEKABLE_STREAM (stream)->cur_pos + stream_fs->inf_bound + offset) > stream_fs->sup_bound)) {
- real_offset = stream_fs->sup_bound;
- whence = SEEK_SET;
- } else if ((CAMEL_SEEKABLE_STREAM (stream)->cur_pos + stream_fs->inf_bound + offset) < stream_fs->inf_bound) {
- real_offset = stream_fs->inf_bound;
- whence = SEEK_SET;
- } else
- {
- real_offset = offset;
- whence = SEEK_CUR;
- }
- break;
-
- case CAMEL_STREAM_END:
- if (stream_fs->sup_bound != -1) {
- real_offset = stream_fs->sup_bound - offset;
- whence = SEEK_SET;
- } else {
- real_offset = offset;
- whence = SEEK_END;
- }
-
-
- break;
- default:
- return -1;
- }
-
-
-
- return_position = lseek (stream_fs->fd, real_offset, whence) - stream_fs->inf_bound;
- if (((CAMEL_SEEKABLE_STREAM (stream)->cur_pos) != return_position) && stream_fs->eof)
- stream_fs->eof = FALSE;
-
- CAMEL_SEEKABLE_STREAM (stream)->cur_pos = return_position;
-
-
- return return_position;
-}
-
-
-
-
-
-
-
-
-
-
-