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/*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is MPEG4IP.
*
* The Initial Developer of the Original Code is Cisco Systems Inc.
* Portions created by Cisco Systems Inc. are
* Copyright (C) Cisco Systems Inc. 2001 - 2005. All Rights Reserved.
*
* Contributor(s):
* Ben Allison benski at nullsoft.com
*
* Virtual I/O support, for file support other than fopen/fread/fwrite
*/
#include "mp4common.h"
#include "virtual_io.h"
/* --------- Virtual IO for FILE * --------- */
u_int64_t FILE_GetFileLength(void *user)
{
FILE *fp = (FILE *)user;
struct stat s;
if (fstat(fileno(fp), &s) < 0) {
throw new MP4Error(errno, "stat failed", "MP4Open");
}
return s.st_size;
}
int FILE_SetPosition(void *user, u_int64_t position)
{
FILE *fp = (FILE *)user;
fpos_t fpos;
VAR_TO_FPOS(fpos, position);
return fsetpos(fp, &fpos);
}
int FILE_GetPosition(void *user, u_int64_t *position)
{
FILE *fp = (FILE *)user;
fpos_t fpos;
if (fgetpos(fp, &fpos) < 0) {
throw new MP4Error(errno, "MP4GetPosition");
}
FPOS_TO_VAR(fpos, u_int64_t, *position);
return 0;
}
size_t FILE_Read(void *user, void *buffer, size_t size)
{
FILE *fp = (FILE *)user;
return fread(buffer, 1, size, fp);
}
size_t FILE_Write(void *user, void *buffer, size_t size)
{
FILE *fp = (FILE *)user;
return fwrite(buffer, 1, size, fp);
}
int FILE_EndOfFile(void *user)
{
FILE *fp = (FILE *)user;
return feof(fp);
}
int FILE_Close(void *user)
{
FILE *fp = (FILE *)user;
return fclose(fp);
}
Virtual_IO FILE_virtual_IO =
{
FILE_GetFileLength,
FILE_SetPosition,
FILE_GetPosition,
FILE_Read,
FILE_Write,
FILE_EndOfFile,
FILE_Close,
};
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