diff options
Diffstat (limited to 'src/input/vcd/libcdio/_cdio_stream.c')
| -rw-r--r-- | src/input/vcd/libcdio/_cdio_stream.c | 200 |
1 files changed, 0 insertions, 200 deletions
diff --git a/src/input/vcd/libcdio/_cdio_stream.c b/src/input/vcd/libcdio/_cdio_stream.c deleted file mode 100644 index d3b9e0ade..000000000 --- a/src/input/vcd/libcdio/_cdio_stream.c +++ /dev/null @@ -1,200 +0,0 @@ -/* - $Id: _cdio_stream.c,v 1.2 2004/04/11 12:20:31 miguelfreitas Exp $ - - Copyright (C) 2000, 2004 Herbert Valerio Riedel <hvr@gnu.org> - - 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 -*/ - -#ifdef HAVE_CONFIG_H -# include "config.h" -#endif - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <stdarg.h> -#include "cdio_assert.h" - -/* #define STREAM_DEBUG */ - -#include <cdio/logging.h> -#include <cdio/util.h> -#include "_cdio_stream.h" - -static const char _rcsid[] = "$Id: _cdio_stream.c,v 1.2 2004/04/11 12:20:31 miguelfreitas Exp $"; - -/* - * DataSource implementations - */ - -struct _CdioDataSource { - void* user_data; - cdio_stream_io_functions op; - int is_open; - long position; -}; - -/* - Open if not already open. - Return false if we hit an error. Errno should be set for that error. -*/ -static bool -_cdio_stream_open_if_necessary(CdioDataSource *obj) -{ - cdio_assert (obj != NULL); - - if (!obj->is_open) { - if ((obj->op.open) (obj->user_data)) { - cdio_warn ("could not open input stream..."); - return false; - } else { - cdio_debug ("opened source..."); - obj->is_open = 1; - obj->position = 0; - } - } - return true; -} - -/*! - Like 3 fseek and in fact may be the same. - - This function sets the file position indicator for the stream - pointed to by stream. The new position, measured in bytes, is obtained - by adding offset bytes to the position specified by whence. If whence - is set to SEEK_SET, SEEK_CUR, or SEEK_END, the offset is relative to - the start of the file, the current position indicator, or end-of-file, - respectively. A successful call to the fseek function clears the end- - of-file indicator for the stream and undoes any effects of the - ungetc(3) function on the same stream. - - RETURN VALUE - Upon successful completion, return 0, - Otherwise, -1 is returned and the global variable errno is set to indi- - cate the error. -*/ -long -cdio_stream_seek(CdioDataSource* obj, long offset, int whence) -{ - cdio_assert (obj != NULL); - - if (!_cdio_stream_open_if_necessary(obj)) - /* errno is set by _cdio_stream_open_if necessary. */ - return -1; - - if (obj->position != offset) { -#ifdef STREAM_DEBUG - cdio_warn("had to reposition DataSource from %ld to %ld!", obj->position, offset); -#endif - obj->position = offset; - return obj->op.seek(obj->user_data, offset, whence); - } - - return 0; -} - -CdioDataSource* -cdio_stream_new(void *user_data, const cdio_stream_io_functions *funcs) -{ - CdioDataSource *new_obj; - - new_obj = _cdio_malloc (sizeof (CdioDataSource)); - - new_obj->user_data = user_data; - memcpy(&(new_obj->op), funcs, sizeof(cdio_stream_io_functions)); - - return new_obj; -} - -/*! - Like fread(3) and in fact may be the same. - - DESCRIPTION: - The function fread reads nmemb elements of data, each size bytes long, - from the stream pointed to by stream, storing them at the location - given by ptr. - - RETURN VALUE: - return the number of items successfully read or written (i.e., - not the number of characters). If an error occurs, or the - end-of-file is reached, the return value is a short item count - (or zero). - - We do not distinguish between end-of-file and error, and callers - must use feof(3) and ferror(3) to determine which occurred. -*/ -long -cdio_stream_read(CdioDataSource* obj, void *ptr, long size, long nmemb) -{ - long read_bytes; - - cdio_assert (obj != NULL); - - if (!_cdio_stream_open_if_necessary(obj)) return 0; - - read_bytes = obj->op.read(obj->user_data, ptr, size*nmemb); - obj->position += read_bytes; - - return read_bytes; -} - -/*! - Return whatever size of stream reports, I guess unit size is bytes. - On error return -1; - */ -long int -cdio_stream_stat(CdioDataSource* obj) -{ - cdio_assert (obj != NULL); - - if (!_cdio_stream_open_if_necessary(obj)) return -1; - - return obj->op.stat(obj->user_data); -} - -void -cdio_stream_close(CdioDataSource* obj) -{ - cdio_assert (obj != NULL); - - if (obj->is_open) { - cdio_debug ("closed source..."); - obj->op.close(obj->user_data); - obj->is_open = 0; - obj->position = 0; - } -} - -void -cdio_stream_destroy(CdioDataSource* obj) -{ - cdio_assert (obj != NULL); - - cdio_stream_close(obj); - - obj->op.free(obj->user_data); - - free(obj); -} - - -/* - * Local variables: - * c-file-style: "gnu" - * tab-width: 8 - * indent-tabs-mode: nil - * End: - */ |