diff options
Diffstat (limited to 'camel/camel-stream-fs.c')
| -rw-r--r-- | camel/camel-stream-fs.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/camel/camel-stream-fs.c b/camel/camel-stream-fs.c new file mode 100644 index 0000000000..0a42e5062f --- /dev/null +++ b/camel/camel-stream-fs.c @@ -0,0 +1,234 @@ +/* -*- 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 */ +/* + * + * Copyright (C) 1999 Bertrand Guiheneuf <Bertrand.Guiheneuf@inria.fr> . + * + * 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 "camel-stream-fs.h" +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <errno.h> + +static CamelStreamClass *parent_class=NULL; + + +/* Returns the class for a CamelMimeMessage */ +#define CS_CLASS(so) CAMEL_STREAM_FS_CLASS (GTK_OBJECT(so)->klass) + +static gint _read (CamelStream *stream, gchar *buffer, gint n); +static gint _write (CamelStream *stream, gchar *buffer, gint n); +static void _flush (CamelStream *stream); +static gint _available (CamelStream *stream); +static gboolean _eos (CamelStream *stream); +static void _close (CamelStream *stream); + + +static void +camel_stream_fs_class_init (CamelStreamClass *camel_stream_fs_class) +{ + CamelStreamClass *camel_stream_class = CAMEL_STREAM_CLASS (camel_stream_fs_class); + parent_class = gtk_type_class (gtk_object_get_type ()); + + /* virtual method definition */ + + /* 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; + +} + + + +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) NULL, + /* reserved_1 */ NULL, + /* reserved_2 */ NULL, + (GtkClassInitFunc) NULL, + }; + + camel_stream_fs_type = gtk_type_unique (camel_stream_get_type (), &camel_stream_fs_info); + } + + return camel_stream_fs_type; +} + + +CamelStream * +camel_stream_fs_new_with_name (GString *name, CamelStreamFsMode mode) +{ + struct stat s; + int v, fd; + int flags; + CamelStreamFs *stream_fs; + + if (!name) return NULL; + + v = stat (name->str, &s); + + if (mode & CAMEL_STREAM_FS_READ) + if (mode & CAMEL_STREAM_FS_WRITE) flags = O_RDWR; + else flags = O_RDONLY; + else + if (mode & CAMEL_STREAM_FS_WRITE) flags = O_WRONLY; + else return NULL; + + if (mode & CAMEL_STREAM_FS_READ) + if (v == -1) return NULL; + + fd = open (name->str, flags); + + stream_fs = CAMEL_STREAM_FS (camel_stream_fs_new_with_fd (fd)); + stream_fs->name = name; + + return CAMEL_STREAM (stream_fs); + +} + +CamelStream * +camel_stream_fs_new_with_fd (int fd) +{ + CamelStreamFs *stream_fs; + + stream_fs = gtk_type_new (camel_stream_fs_get_type ()); + stream_fs->fd = fd; + 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) +{ + int v; + + do { + v = read ( (CAMEL_STREAM_FS (stream))->fd, buffer, n); + } while (v == -1 && errno == EINTR); + + return v; +} + + +/** + * _write: read 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, gchar *buffer, gint n) +{ + int v; + + do { + v = write ( (CAMEL_STREAM_FS (stream))->fd, buffer, n); + } while (v == -1 && errno == EINTR); + + return v; + +} + + + +/** + * _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 gint +_available (CamelStream *stream) +{ + g_warning ("Not implemented yet"); +} + + +/** + * _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) +{ + g_warning ("Not implemented yet"); +} + + +/** + * _close: close a stream + * @stream: the stream + * + * + **/ +static void +_close (CamelStream *stream) +{ + close ((CAMEL_STREAM_FS (stream))->fd); +} |