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45 lines
994 B
C
45 lines
994 B
C
/*
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* Helper functions to handle compression via zlib
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*
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* Copyright (C) 2007-2008 Julian Brown
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* Copyright (C) 2008 Mike Frysinger
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*
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* Licensed under the GPL-2 or later.
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*/
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#ifndef __ELF2FLT_COMPRESS_H__
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#define __ELF2FLT_COMPRESS_H__
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#include <zlib.h>
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typedef enum
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{
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INVALID,
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UNCOMPRESSED,
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COMPRESSED
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} stream_type;
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/* Tagged union holding either a regular FILE* handle or a zlib gzFile
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handle. */
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typedef struct
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{
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stream_type type;
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const char *mode;
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union
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{
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FILE *filep;
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gzFile gzfilep;
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} u;
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} stream;
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int fopen_stream_u(stream *fp, const char *path, const char *mode);
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size_t fread_stream(void *ptr, size_t size, size_t nmemb, stream *str);
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size_t fwrite_stream(const void *ptr, size_t size, size_t nmemb, stream *str);
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int fclose_stream(stream *str);
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int ferror_stream(stream *str);
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int fseek_stream(stream *str, long offset, int whence);
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void reopen_stream_compressed(stream *str);
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void transfer(stream *ifp, stream *ofp, int count);
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#endif
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