| /**************************************************************************** |
| ** |
| ** Copyright (C) 2017 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" |
| |
| #ifndef _BSD_SOURCE |
| # define _BSD_SOURCE |
| #endif |
| #ifndef _DEFAULT_SOURCE |
| # define _DEFAULT_SOURCE |
| #endif |
| #ifndef assert |
| # include <assert.h> |
| #endif |
| #include <stddef.h> |
| #include <stdint.h> |
| #include <string.h> |
| |
| #ifndef __cplusplus |
| # include <stdbool.h> |
| #endif |
| |
| #if __STDC_VERSION__ >= 201112L || (defined(__cplusplus) && __cplusplus >= 201103L) || (defined(__cpp_static_assert) && __cpp_static_assert >= 200410) |
| # define cbor_static_assert(x) static_assert(x, #x) |
| #elif !defined(__cplusplus) && defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 406) && (__STDC_VERSION__ > 199901L) |
| # 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 |
| |
| #ifdef NDEBUG |
| # define cbor_assert(cond) do { if (!(cond)) unreachable(); } while (0) |
| #else |
| # define cbor_assert(cond) assert(cond) |
| #endif |
| |
| #ifndef STRINGIFY |
| #define STRINGIFY(x) STRINGIFY2(x) |
| #endif |
| #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) |
| |
| #if defined(__GNUC__) && defined(__i386__) && !defined(__iamcu__) |
| # define CBOR_INTERNAL_API_CC __attribute__((regparm(3))) |
| #elif defined(_MSC_VER) && defined(_M_IX86) |
| # define CBOR_INTERNAL_API_CC __fastcall |
| #else |
| # define CBOR_INTERNAL_API_CC |
| #endif |
| |
| #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 <sys/byteorder.h> |
| #elif defined(_MSC_VER) |
| /* MSVC, which implies Windows, which implies little-endian and sizeof(long) == 4 */ |
| # include <stdlib.h> |
| # 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 <arpa/inet.h> |
| # define cbor_ntohs ntohs |
| # define cbor_htons htons |
| #endif |
| #ifndef cbor_ntohl |
| # include <arpa/inet.h> |
| # 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__) || \ |
| (defined(__BYTE_ORDER) && defined(__BIG_ENDIAN) && __BYTE_ORDER == __BIG_ENDIAN) || \ |
| (defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN) || \ |
| (defined(_BIG_ENDIAN) && !defined(_LITTLE_ENDIAN)) || (defined(__BIG_ENDIAN__) && !defined(__LITTLE_ENDIAN__)) || \ |
| defined(__ARMEB__) || defined(__MIPSEB__) || defined(__s390__) || defined(__sparc__) |
| # define ntohll |
| # define htonll |
| # elif (defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) || \ |
| (defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && __BYTE_ORDER == __LITTLE_ENDIAN) || \ |
| (defined(BYTE_ORDER) && defined(LITTLE_ENDIAN) && BYTE_ORDER == LITTLE_ENDIAN) || \ |
| defined(_LITTLE_ENDIAN) || defined(__LITTLE_ENDIAN__) || defined(__ARMEL__) || defined(__MIPSEL__) || \ |
| defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__) || defined(__amd64) |
| # define ntohll(x) ((cbor_ntohl((uint32_t)(x)) * UINT64_C(0x100000000)) + (cbor_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<t>(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__ |
| #ifndef likely |
| # define likely(x) __builtin_expect(!!(x), 1) |
| #endif |
| #ifndef unlikely |
| # define unlikely(x) __builtin_expect(!!(x), 0) |
| #endif |
| # 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 |
| } |
| |
| #endif /* COMPILERSUPPORT_H */ |
