31 lines
1.6 KiB
C
31 lines
1.6 KiB
C
// -- "Integer Compression" variable simple "SimpleV" -----------------------------------------------------------
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// this belongs to the integer compression known as "simple family", like simple-9,simple-16
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// or simple-8b. SimpleV is compressing integers in groups into variable word size 32, 40 and 64 bits + RLE (run length encoding)
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// SimpleV is faster than simple-16 and compress better than simple-16 or simple-8b.
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#ifdef __cplusplus
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extern "C" {
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#endif
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size_t vsbound8( size_t n);
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size_t vsbound16(size_t n);
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size_t vsbound32(size_t n);
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size_t vsbound64(size_t n);
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// vsencNN: compress array with n unsigned (NN bits in[n]) values to the buffer out. Return value = end of compressed output buffer out
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unsigned char *vsenc8( unsigned char *__restrict in, size_t n, unsigned char *__restrict out);
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unsigned char *vsenc16(unsigned short *__restrict in, size_t n, unsigned char *__restrict out);
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unsigned char *vsenc32(unsigned *__restrict in, size_t n, unsigned char *__restrict out);
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unsigned char *vsenc64(uint64_t *__restrict in, size_t n, unsigned char *__restrict out);
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// vsdecNN: decompress buffer into an array of n unsigned values. Return value = end of compressed input buffer in
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unsigned char *vsdec8( unsigned char *__restrict in, size_t n, unsigned char *__restrict out);
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unsigned char *vsdec16(unsigned char *__restrict in, size_t n, unsigned short *__restrict out);
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unsigned char *vsdec32(unsigned char *__restrict in, size_t n, unsigned *__restrict out);
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unsigned char *vsdec64(unsigned char *__restrict in, size_t n, uint64_t *__restrict out);
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#ifdef __cplusplus
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}
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#endif
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