forked from mia/Aegisub
82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
// Copyright (c) 2007-2009 Fredrik Mellbin
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#ifndef STDIOSTREAM_H
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#define STDIOSTREAM_H
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "MatroskaParser.h"
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#define CACHESIZE 65536
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/************\
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* Structures *
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\************/
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/* first we need to create an I/O object that the parser will use to read the
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* source file
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*/
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struct StdIoStream {
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struct InputStream base;
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FILE *fp;
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int error;
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};
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typedef struct StdIoStream StdIoStream;
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/***********\
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* Functions *
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\***********/
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/* read count bytes into buffer starting at file position pos
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* return the number of bytes read, -1 on error or 0 on EOF
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*/
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int StdIoRead(StdIoStream *st, ulonglong pos, void *buffer, int count);
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/* scan for a signature sig(big-endian) starting at file position pos
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* return position of the first byte of signature or -1 if error/not found
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*/
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longlong StdIoScan(StdIoStream *st, ulonglong start, unsigned signature);
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/* return cache size, this is used to limit readahead */
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unsigned StdIoGetCacheSize(StdIoStream *st);
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/* return last error message */
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const char *StdIoGetLastError(StdIoStream *st);
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/* memory allocation, this is done via stdlib */
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void *StdIoMalloc(StdIoStream *st, size_t size);
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void *StdIoRealloc(StdIoStream *st, void *mem, size_t size);
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void StdIoFree(StdIoStream *st, void *mem);
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/* progress report handler for lengthy operations
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* returns 0 to abort operation, nonzero to continue
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*/
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int StdIoProgress(StdIoStream *st, ulonglong cur, ulonglong max);
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longlong StdIoGetFileSize(StdIoStream *st);
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void InitStdIoStream(StdIoStream *st);
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#endif /* #ifndef STDIOSTREAM_H */
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