diff options
Diffstat (limited to 'camel/camel-stream-fs.c')
| -rw-r--r-- | camel/camel-stream-fs.c | 549 |
1 files changed, 0 insertions, 549 deletions
diff --git a/camel/camel-stream-fs.c b/camel/camel-stream-fs.c deleted file mode 100644 index f13e3002c9..0000000000 --- a/camel/camel-stream-fs.c +++ /dev/null @@ -1,549 +0,0 @@ -/* -*- 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; -} - - - - - - - - - - - |