Mercurial > hg
view mercurial/bitmanipulation.h @ 48836:e020dbbc41e5
cleanup: stop bundling concurrent.futures on Python 2
We no longer support Python 2.
Differential Revision: https://phab.mercurial-scm.org/D12280
author | Augie Fackler <augie@google.com> |
---|---|
date | Wed, 02 Mar 2022 10:25:11 -0500 |
parents | d86908050375 |
children |
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#ifndef HG_BITMANIPULATION_H #define HG_BITMANIPULATION_H #include <string.h> #include "compat.h" /* Reads a 64 bit integer from big-endian bytes. Assumes that the data is long enough */ static inline uint64_t getbe64(const char *c) { const unsigned char *d = (const unsigned char *)c; return ((((uint64_t)d[0]) << 56) | (((uint64_t)d[1]) << 48) | (((uint64_t)d[2]) << 40) | (((uint64_t)d[3]) << 32) | (((uint64_t)d[4]) << 24) | (((uint64_t)d[5]) << 16) | (((uint64_t)d[6]) << 8) | (d[7])); } static inline uint32_t getbe32(const char *c) { const unsigned char *d = (const unsigned char *)c; return ((((uint32_t)d[0]) << 24) | (((uint32_t)d[1]) << 16) | (((uint32_t)d[2]) << 8) | (d[3])); } static inline int16_t getbeint16(const char *c) { const unsigned char *d = (const unsigned char *)c; return ((d[0] << 8) | (d[1])); } static inline uint16_t getbeuint16(const char *c) { const unsigned char *d = (const unsigned char *)c; return ((d[0] << 8) | (d[1])); } /* Writes a 64 bit integer to bytes in a big-endian format. Assumes that the buffer is long enough */ static inline void putbe64(uint64_t x, char *c) { c[0] = (x >> 56) & 0xff; c[1] = (x >> 48) & 0xff; c[2] = (x >> 40) & 0xff; c[3] = (x >> 32) & 0xff; c[4] = (x >> 24) & 0xff; c[5] = (x >> 16) & 0xff; c[6] = (x >> 8) & 0xff; c[7] = (x)&0xff; } static inline void putbe32(uint32_t x, char *c) { c[0] = (x >> 24) & 0xff; c[1] = (x >> 16) & 0xff; c[2] = (x >> 8) & 0xff; c[3] = (x)&0xff; } static inline double getbefloat64(const char *c) { const unsigned char *d = (const unsigned char *)c; double ret; int i; uint64_t t = 0; for (i = 0; i < 8; i++) { t = (t << 8) + d[i]; } memcpy(&ret, &t, sizeof(t)); return ret; } #endif