diff options
Diffstat (limited to 'camel/camel-seekable-stream.c')
| -rw-r--r-- | camel/camel-seekable-stream.c | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/camel/camel-seekable-stream.c b/camel/camel-seekable-stream.c deleted file mode 100644 index c4ca950baa..0000000000 --- a/camel/camel-seekable-stream.c +++ /dev/null @@ -1,201 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ - -/* - * 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-seekable-stream.h" - -static CamelStreamClass *parent_class = NULL; - -/* Returns the class for a CamelSeekableStream */ -#define CSS_CLASS(so) CAMEL_SEEKABLE_STREAM_CLASS (CAMEL_OBJECT_GET_CLASS(so)) - -static off_t seek (CamelSeekableStream *stream, off_t offset, - CamelStreamSeekPolicy policy); -static off_t stream_tell (CamelSeekableStream *stream); -static int reset (CamelStream *stream); -static int set_bounds (CamelSeekableStream *stream, off_t start, off_t end); - -static void -camel_seekable_stream_class_init (CamelSeekableStreamClass *camel_seekable_stream_class) -{ - CamelStreamClass *camel_stream_class = - CAMEL_STREAM_CLASS (camel_seekable_stream_class); - - parent_class = CAMEL_STREAM_CLASS( camel_type_get_global_classfuncs( CAMEL_STREAM_TYPE ) ); - - /* seekable stream methods */ - camel_seekable_stream_class->seek = seek; - camel_seekable_stream_class->tell = stream_tell; - camel_seekable_stream_class->set_bounds = set_bounds; - - /* camel stream methods overload */ - camel_stream_class->reset = reset; -} - -static void -camel_seekable_stream_init (void *o) -{ - CamelSeekableStream *stream = (CamelSeekableStream *)o; - - stream->bound_start = 0; - stream->bound_end = CAMEL_STREAM_UNBOUND; -} - -CamelType -camel_seekable_stream_get_type (void) -{ - static CamelType camel_seekable_stream_type = CAMEL_INVALID_TYPE; - - if (camel_seekable_stream_type == CAMEL_INVALID_TYPE) { - camel_seekable_stream_type = camel_type_register( CAMEL_STREAM_TYPE, - "CamelSeekableStream", - sizeof( CamelSeekableStream ), - sizeof( CamelSeekableStreamClass ), - (CamelObjectClassInitFunc) camel_seekable_stream_class_init, - NULL, - (CamelObjectInitFunc) camel_seekable_stream_init, - NULL ); - } - - return camel_seekable_stream_type; -} - - -static off_t -seek (CamelSeekableStream *stream, off_t offset, - CamelStreamSeekPolicy policy) -{ - g_warning ("CamelSeekableStream::seek called on default " - "implementation\n"); - return -1; -} - -/** - * camel_stream_seek: - * @stream: a CamelStream object. - * @offset: offset value - * @policy: what to do with the offset - * - * Seek to the specified position in @stream. - * - * If @policy is CAMEL_STREAM_SET, seeks to @offset. - * - * If @policy is CAMEL_STREAM_CUR, seeks to the current position plus - * @offset. - * - * If @policy is CAMEL_STREAM_END, seeks to the end of the stream plus - * @offset. - * - * Regardless of @policy, the stream's final position will be clamped - * to the range specified by its lower and upper bounds, and the - * stream's eos state will be updated. - * - * Return value: new position, -1 if operation failed. - **/ -off_t -camel_seekable_stream_seek (CamelSeekableStream *stream, off_t offset, - CamelStreamSeekPolicy policy) -{ - g_return_val_if_fail (CAMEL_IS_SEEKABLE_STREAM (stream), -1); - - return CSS_CLASS (stream)->seek (stream, offset, policy); -} - - -static off_t -stream_tell (CamelSeekableStream *stream) -{ - return stream->position; -} - -/** - * camel_seekable_stream_tell: - * @stream: seekable stream object - * - * Get the current position of a seekable stream. - * - * Return value: the position. - **/ -off_t -camel_seekable_stream_tell (CamelSeekableStream *stream) -{ - g_return_val_if_fail (CAMEL_IS_SEEKABLE_STREAM (stream), -1); - - return CSS_CLASS (stream)->tell (stream); -} - -static int -set_bounds (CamelSeekableStream *stream, off_t start, off_t end) -{ - /* store the bounds */ - stream->bound_start = start; - stream->bound_end = end; - - if (start > stream->position) - return camel_seekable_stream_seek (stream, start, CAMEL_STREAM_SET); - - return 0; -} - -/** - * camel_seekable_stream_set_bounds: - * @stream: a seekable stream - * @start: the first valid position - * @end: the first invalid position, or CAMEL_STREAM_UNBOUND - * - * Set the range of valid data this stream is allowed to cover. If - * there is to be no @end value, then @end should be set to - * #CAMEL_STREAM_UNBOUND. - * - * Return value: -1 on error. - **/ -int -camel_seekable_stream_set_bounds (CamelSeekableStream *stream, - off_t start, off_t end) -{ - g_return_val_if_fail (CAMEL_IS_SEEKABLE_STREAM (stream), -1); - g_return_val_if_fail (end == CAMEL_STREAM_UNBOUND || end >= start, -1); - - return CSS_CLASS (stream)->set_bounds (stream, start, end); -} - -/* a default implementation of reset for seekable streams */ -static int -reset (CamelStream *stream) -{ - CamelSeekableStream *seekable_stream; - - seekable_stream = CAMEL_SEEKABLE_STREAM (stream); - - return camel_seekable_stream_seek (seekable_stream, - seekable_stream->bound_start, - CAMEL_STREAM_SET); -} - - - - - - |