mirror of
https://github.com/facebook/sapling.git
synced 2024-10-11 17:27:53 +03:00
c12e300bb8
Summary: Move top-level Python packages `mercurial`, `hgext` and `hgdemandimport` to a new top-level package `edenscm`. This allows the Python packages provided by the upstream Mercurial to be installed side-by-side. To maintain compatibility, `edenscm/` gets added to `sys.path` in `mercurial/__init__.py`. Reviewed By: phillco, ikostia Differential Revision: D13853115 fbshipit-source-id: b296b0673dc54c61ef6a591ebc687057ff53b22e
87 lines
2.0 KiB
C
87 lines
2.0 KiB
C
#ifndef _HG_BITMANIPULATION_H_
|
|
#define _HG_BITMANIPULATION_H_
|
|
|
|
#include <string.h>
|
|
|
|
#include "compat.h"
|
|
|
|
#if defined(_MSC_VER)
|
|
/* Windows only supports little-endian platforms */
|
|
static inline uint64_t hg_be_u64(uint64_t x) {
|
|
return _byteswap_uint64(x);
|
|
}
|
|
static inline uint32_t hg_be_u32(uint32_t x) {
|
|
return _byteswap_ulong(x);
|
|
}
|
|
static inline uint16_t hg_be_u16(uint16_t x) {
|
|
return _byteswap_ushort(x);
|
|
}
|
|
#elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
|
|
static inline uint64_t hg_be_u64(uint64_t x) {
|
|
return __builtin_bswap64(x);
|
|
}
|
|
static inline uint32_t hg_be_u32(uint32_t x) {
|
|
return __builtin_bswap32(x);
|
|
}
|
|
static inline uint16_t hg_be_u16(uint16_t x) {
|
|
return __builtin_bswap16(x);
|
|
}
|
|
#else
|
|
/* For completeness... */
|
|
static inline uint64_t hg_be_u64(uint64_t x) {
|
|
return x;
|
|
}
|
|
static inline uint32_t hg_be_u32(uint32_t x) {
|
|
return x;
|
|
}
|
|
static inline uint16_t hg_be_u16(uint16_t x) {
|
|
return x;
|
|
}
|
|
#endif
|
|
|
|
static inline uint32_t getbe32(const char* c) {
|
|
uint32_t value;
|
|
memcpy(&value, c, sizeof(value));
|
|
return hg_be_u32(value);
|
|
}
|
|
|
|
static inline uint16_t getbeuint16(const char* c) {
|
|
uint16_t value;
|
|
memcpy(&value, c, sizeof(value));
|
|
return hg_be_u16(value);
|
|
}
|
|
|
|
static inline int16_t getbeint16(const char* c) {
|
|
/*
|
|
* Note: this code technically has undefined behavior for negative
|
|
* values, although it's written in a way that the compiler and UBSAN
|
|
* hopefully shouldn't complain about it.
|
|
*
|
|
* This relies on the platform using 2s-compliment representations for
|
|
* signed integers. This isn't guaranteed by the C standard, but is
|
|
* true in practice for all modern platforms.
|
|
*/
|
|
union {
|
|
uint16_t unsignedvalue;
|
|
int16_t signedvalue;
|
|
} u;
|
|
u.unsignedvalue = getbeuint16(c);
|
|
return u.signedvalue;
|
|
}
|
|
|
|
static inline void putbe32(uint32_t x, char* c) {
|
|
uint32_t v = hg_be_u32(x);
|
|
memcpy(c, &v, sizeof(v));
|
|
}
|
|
|
|
static inline double getbefloat64(const char* c) {
|
|
uint64_t n;
|
|
double d;
|
|
memcpy(&n, c, sizeof(n));
|
|
n = hg_be_u64(n);
|
|
memcpy(&d, &n, sizeof(n));
|
|
return d;
|
|
}
|
|
|
|
#endif
|