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BitUtil: Delta, ZigZag, NumBits, Floating Point,...

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powturbo
2015-06-28 13:24:02 +02:00
parent c68565e880
commit ea146a6ed1
1 changed files with 16 additions and 1 deletions
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17
bitutil.h
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@ -115,12 +115,27 @@ unsigned bitf32( unsigned *in, unsigned n, unsigned start); // sorted
unsigned bitf132( unsigned *in, unsigned n, unsigned start);
unsigned bitfm32( unsigned *in, unsigned n, unsigned *pmin); // unsorted
unsigned bitf1m32( unsigned *in, unsigned n, unsigned *pmin);
// zigzag encoding
// zigzag encoding for unsorted integer lists
unsigned bitzigzag32(unsigned *in, unsigned n, unsigned *out, unsigned start);
unsigned bitzigzag64(unsigned *in, unsigned n, unsigned *out, unsigned start);
void bitunzigzag32( unsigned *p, unsigned n, unsigned start);
void bitunzigzag64( unsigned *p, unsigned n, unsigned start);
//---- Floating point to Integer decompostion ---------------------------------
#define FMANT_BITS 23
#define DMANT_BITS 52
#define BITFLOAT(__u, __sgn, __expo, __mant, __mantbits, __one) __sgn = __u >> (sizeof(__u)*8-1); __expo = ((__u >> (__mantbits)) & ( (__one<<(sizeof(__u)*8 - 1 - __mantbits)) -1)); __mant = __u & ((__one<<__mantbits)-1);
#define BITUNFLOAT( __sgn, __expo, __mant, __u, __mantbits) __u = (__sgn) << (sizeof(__u)*8-1) | (__expo) << __mantbits | (__mant)
// De-/Compose floating point array to/from integer arrays (sign,exponent,mantissa) for using with "Integer Compression" functions ------------
void bitdouble( double *in, unsigned n, unsigned *sgn, unsigned *expo, uint64_t *mant);
void bitundouble( unsigned *sgn, unsigned *expo, uint64_t *mant, unsigned n, double *out);
void bitfloat( float *in, unsigned n, unsigned *sgn, unsigned *expo, unsigned *mant);
void bitunfloat( unsigned *sgn, unsigned *expo, unsigned *mant, unsigned n, float *out);
#ifdef __cplusplus
}
#endif