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