diff options
Diffstat (limited to 'thirdparty/zstd/common/mem.h')
| -rw-r--r-- | thirdparty/zstd/common/mem.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/thirdparty/zstd/common/mem.h b/thirdparty/zstd/common/mem.h index 9f3b81ab9d..85581c3847 100644 --- a/thirdparty/zstd/common/mem.h +++ b/thirdparty/zstd/common/mem.h @@ -51,6 +51,8 @@ extern "C" { # include <stdint.h> /* intptr_t */ # endif typedef uint8_t BYTE; + typedef uint8_t U8; + typedef int8_t S8; typedef uint16_t U16; typedef int16_t S16; typedef uint32_t U32; @@ -63,6 +65,8 @@ extern "C" { # error "this implementation requires char to be exactly 8-bit type" #endif typedef unsigned char BYTE; + typedef unsigned char U8; + typedef signed char S8; #if USHRT_MAX != 65535 # error "this implementation requires short to be exactly 16-bit type" #endif @@ -153,8 +157,22 @@ MEM_STATIC unsigned MEM_64bits(void) { return sizeof(size_t)==8; } MEM_STATIC unsigned MEM_isLittleEndian(void) { +#if defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) + return 1; +#elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) + return 0; +#elif defined(__clang__) && __LITTLE_ENDIAN__ + return 1; +#elif defined(__clang__) && __BIG_ENDIAN__ + return 0; +#elif defined(_MSC_VER) && (_M_AMD64 || _M_IX86) + return 1; +#elif defined(__DMC__) && defined(_M_IX86) + return 1; +#else const union { U32 u; BYTE c[4]; } one = { 1 }; /* don't use static : performance detrimental */ return one.c[0]; +#endif } #if defined(MEM_FORCE_MEMORY_ACCESS) && (MEM_FORCE_MEMORY_ACCESS==2) |