/**************************************************************************** ** ** Copyright (C) 2015 Intel Corporation ** ** Permission is hereby granted, free of charge, to any person obtaining a copy ** of this software and associated documentation files (the "Software"), to deal ** in the Software without restriction, including without limitation the rights ** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell ** copies of the Software, and to permit persons to whom the Software is ** furnished to do so, subject to the following conditions: ** ** The above copyright notice and this permission notice shall be included in ** all copies or substantial portions of the Software. ** ** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR ** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, ** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE ** AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER ** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, ** OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN ** THE SOFTWARE. ** ****************************************************************************/ #ifndef COMPILERSUPPORT_H #define COMPILERSUPPORT_H #include "cbor.h" #ifdef __cplusplus extern "C" { #endif #ifndef _BSD_SOURCE # define _BSD_SOURCE #endif #ifndef _DEFAULT_SOURCE # define _DEFAULT_SOURCE #endif #include #include #include #include #include #ifndef __cplusplus # include #endif #ifdef __F16C__ # include #endif #ifndef _Static_assert #define _Static_assert(...) #endif #if __STDC_VERSION__ >= 201112L || __cplusplus >= 201103L || __cpp_static_assert >= 200410 # define cbor_static_assert(x) _Static_assert(x, #x) #elif !defined(__cplusplus) && defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 406) # define cbor_static_assert(x) _Static_assert(x, #x) #else # define cbor_static_assert(x) ((void)sizeof(char[2*!!(x) - 1])) #endif #if __STDC_VERSION__ >= 199901L || defined(__cplusplus) /* inline is a keyword */ #else /* use the definition from cbor.h */ # define inline CBOR_INLINE #endif #define STRINGIFY(x) STRINGIFY2(x) #define STRINGIFY2(x) #x #if !defined(UINT32_MAX) || !defined(INT64_MAX) /* C89? We can define UINT32_MAX portably, but not INT64_MAX */ # error "Your system has stdint.h but that doesn't define UINT32_MAX or INT64_MAX" #endif #ifndef DBL_DECIMAL_DIG /* DBL_DECIMAL_DIG is C11 */ # define DBL_DECIMAL_DIG 17 #endif #define DBL_DECIMAL_DIG_STR STRINGIFY(DBL_DECIMAL_DIG) #ifndef __has_builtin # define __has_builtin(x) 0 #endif #if (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 403)) || \ (__has_builtin(__builtin_bswap64) && __has_builtin(__builtin_bswap32)) # if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ # define cbor_ntohll __builtin_bswap64 # define cbor_htonll __builtin_bswap64 # define cbor_ntohl __builtin_bswap32 # define cbor_htonl __builtin_bswap32 # ifdef __INTEL_COMPILER # define cbor_ntohs _bswap16 # define cbor_htons _bswap16 # elif (__GNUC__ * 100 + __GNUC_MINOR__ >= 608) || __has_builtin(__builtin_bswap16) # define cbor_ntohs __builtin_bswap16 # define cbor_htons __builtin_bswap16 # else # define cbor_ntohs(x) (((uint16_t)x >> 8) | ((uint16_t)x << 8)) # define cbor_htons cbor_ntohs # endif # else # define cbor_ntohll # define cbor_htonll # define cbor_ntohl # define cbor_htonl # define cbor_ntohs # define cbor_htons # endif #elif defined(__sun) # include #elif defined(_MSC_VER) /* MSVC, which implies Windows, which implies little-endian and sizeof(long) == 4 */ # define cbor_ntohll _byteswap_uint64 # define cbor_htonll _byteswap_uint64 # define cbor_ntohl _byteswap_ulong # define cbor_htonl _byteswap_ulong # define cbor_ntohs _byteswap_ushort # define cbor_htons _byteswap_ushort #endif #ifndef cbor_ntohs # include # define cbor_ntohs ntohs # define cbor_htons htons #endif #ifndef cbor_ntohl # include # define cbor_ntohl ntohl # define cbor_htonl htonl #endif #ifndef cbor_ntohll # define cbor_ntohll ntohll # define cbor_htonll htonll /* ntohll isn't usually defined */ # ifndef ntohll # if defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ # define ntohll # define htonll # elif defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ # define ntohll(x) ((ntohl((uint32_t)(x)) * UINT64_C(0x100000000)) + (ntohl((x) >> 32))) # define htonll ntohll # else # error "Unable to determine byte order!" # endif # endif #endif #ifdef __cplusplus # define CONST_CAST(t, v) const_cast(v) #else /* C-style const_cast without triggering a warning with -Wcast-qual */ # define CONST_CAST(t, v) (t)(uintptr_t)(v) #endif #ifdef __GNUC__ # define likely(x) __builtin_expect(!!(x), 1) # define unlikely(x) __builtin_expect(!!(x), 0) # define unreachable() __builtin_unreachable() #elif defined(_MSC_VER) # define likely(x) (x) # define unlikely(x) (x) # define unreachable() __assume(0) #else # define likely(x) (x) # define unlikely(x) (x) # define unreachable() do {} while (0) #endif static inline bool add_check_overflow(size_t v1, size_t v2, size_t *r) { #if ((defined(__GNUC__) && (__GNUC__ >= 5)) && !defined(__INTEL_COMPILER)) || __has_builtin(__builtin_add_overflow) return __builtin_add_overflow(v1, v2, r); #else /* unsigned additions are well-defined */ *r = v1 + v2; return v1 > v1 + v2; #endif } static inline unsigned short encode_half(double val) { #ifdef __F16C__ return _cvtss_sh(val, 3); #else uint64_t v; memcpy(&v, &val, sizeof(v)); int sign = v >> 63 << 15; int exp = (v >> 52) & 0x7ff; int mant = v << 12 >> 12 >> (53-11); /* keep only the 11 most significant bits of the mantissa */ exp -= 1023; if (exp == 1024) { /* infinity or NaN */ exp = 16; mant >>= 1; } else if (exp >= 16) { /* overflow, as largest number */ exp = 15; mant = 1023; } else if (exp >= -14) { /* regular normal */ } else if (exp >= -24) { /* subnormal */ mant |= 1024; mant >>= -(exp + 14); exp = -15; } else { /* underflow, make zero */ return 0; } return sign | ((exp + 15) << 10) | mant; #endif } #ifdef __cplusplus } #endif #endif /* COMPILERSUPPORT_H */