diff options
Diffstat (limited to 'src/util.h')
| -rw-r--r-- | src/util.h | 41 |
1 files changed, 16 insertions, 25 deletions
diff --git a/src/util.h b/src/util.h index 04227a7c9b..dac86bd77f 100644 --- a/src/util.h +++ b/src/util.h @@ -173,31 +173,6 @@ static SECP256K1_INLINE void *checked_realloc(const secp256k1_callback* cb, void # define SECP256K1_GNUC_EXT #endif -/* If SECP256K1_{LITTLE,BIG}_ENDIAN is not explicitly provided, infer from various other system macros. */ -#if !defined(SECP256K1_LITTLE_ENDIAN) && !defined(SECP256K1_BIG_ENDIAN) -/* Inspired by https://github.com/rofl0r/endianness.h/blob/9853923246b065a3b52d2c43835f3819a62c7199/endianness.h#L52L73 */ -# if (defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) || \ - defined(_X86_) || defined(__x86_64__) || defined(__i386__) || \ - defined(__i486__) || defined(__i586__) || defined(__i686__) || \ - defined(__MIPSEL) || defined(_MIPSEL) || defined(MIPSEL) || \ - defined(__ARMEL__) || defined(__AARCH64EL__) || \ - (defined(__LITTLE_ENDIAN__) && __LITTLE_ENDIAN__ == 1) || \ - (defined(_LITTLE_ENDIAN) && _LITTLE_ENDIAN == 1) || \ - defined(_M_IX86) || defined(_M_AMD64) || defined(_M_ARM) /* MSVC */ -# define SECP256K1_LITTLE_ENDIAN -# endif -# if (defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) || \ - defined(__MIPSEB) || defined(_MIPSEB) || defined(MIPSEB) || \ - defined(__MICROBLAZEEB__) || defined(__ARMEB__) || defined(__AARCH64EB__) || \ - (defined(__BIG_ENDIAN__) && __BIG_ENDIAN__ == 1) || \ - (defined(_BIG_ENDIAN) && _BIG_ENDIAN == 1) -# define SECP256K1_BIG_ENDIAN -# endif -#endif -#if defined(SECP256K1_LITTLE_ENDIAN) == defined(SECP256K1_BIG_ENDIAN) -# error Please make sure that either SECP256K1_LITTLE_ENDIAN or SECP256K1_BIG_ENDIAN is set, see src/util.h. -#endif - /* Zero memory if flag == 1. Flag must be 0 or 1. Constant time. */ static SECP256K1_INLINE void secp256k1_memczero(void *s, size_t len, int flag) { unsigned char *p = (unsigned char *)s; @@ -338,4 +313,20 @@ static SECP256K1_INLINE int secp256k1_ctz64_var(uint64_t x) { #endif } +/* Read a uint32_t in big endian */ +SECP256K1_INLINE static uint32_t secp256k1_read_be32(const unsigned char* p) { + return (uint32_t)p[0] << 24 | + (uint32_t)p[1] << 16 | + (uint32_t)p[2] << 8 | + (uint32_t)p[3]; +} + +/* Write a uint32_t in big endian */ +SECP256K1_INLINE static void secp256k1_write_be32(unsigned char* p, uint32_t x) { + p[3] = x; + p[2] = x >> 8; + p[1] = x >> 16; + p[0] = x >> 24; +} + #endif /* SECP256K1_UTIL_H */ |