forked from mia/Aegisub
59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
#ifndef STDIOSTREAM_H
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#define STDIOSTREAM_H
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#include "MatroskaParser.h"
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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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#endif /* #ifndef STDIOSTREAM_H */
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