diff options
Diffstat (limited to 'Firestore/Port/absl/absl_endian.h')
| -rw-r--r-- | Firestore/Port/absl/absl_endian.h | 342 |
1 files changed, 0 insertions, 342 deletions
diff --git a/Firestore/Port/absl/absl_endian.h b/Firestore/Port/absl/absl_endian.h deleted file mode 100644 index 2c51a27..0000000 --- a/Firestore/Port/absl/absl_endian.h +++ /dev/null @@ -1,342 +0,0 @@ -/* - * Copyright 2017 Google - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#ifndef ABSL_BASE_INTERNAL_ENDIAN_H_ -#define ABSL_BASE_INTERNAL_ENDIAN_H_ - -// The following guarantees declaration of the byte swap functions -#ifdef _MSC_VER -#include <stdlib.h> // NOLINT(build/include) -#elif defined(__APPLE__) && defined(__MACH__) -// Mac OS X / Darwin features -#include <libkern/OSByteOrder.h> -#elif defined(__GLIBC__) -#include <byteswap.h> // IWYU pragma: export -#endif - -#include <cstdint> -#include "Firestore/Port/absl/absl_port.h" - -namespace absl { - -// Use compiler byte-swapping intrinsics if they are available. 32-bit -// and 64-bit versions are available in Clang and GCC as of GCC 4.3.0. -// The 16-bit version is available in Clang and GCC only as of GCC 4.8.0. -// For simplicity, we enable them all only for GCC 4.8.0 or later. -#if defined(__clang__) || \ - (defined(__GNUC__) && ((__GNUC__ == 4 && __GNUC_MINOR__ >= 8) || __GNUC__ >= 5)) -inline uint64_t gbswap_64(uint64_t host_int) { - return __builtin_bswap64(host_int); -} -inline uint32_t gbswap_32(uint32_t host_int) { - return __builtin_bswap32(host_int); -} -inline uint16 gbswap_16(uint16 host_int) { - return __builtin_bswap16(host_int); -} - -#elif defined(_MSC_VER) -inline uint64_t gbswap_64(uint64_t host_int) { - return _byteswap_uint64(host_int); -} -inline uint32_t gbswap_32(uint32_t host_int) { - return _byteswap_ulong(host_int); -} -inline uint16 gbswap_16(uint16 host_int) { - return _byteswap_ushort(host_int); -} - -#elif defined(__APPLE__) && defined(__MACH__) -inline uint64_t gbswap_64(uint64_t host_int) { - return OSSwapInt16(host_int); -} -inline uint32_t gbswap_32(uint32_t host_int) { - return OSSwapInt32(host_int); -} -inline uint16 gbswap_16(uint16 host_int) { - return OSSwapInt64(host_int); -} - -#else -inline uint64_t gbswap_64(uint64_t host_int) { -#if defined(__GNUC__) && defined(__x86_64__) && !(defined(__APPLE__) && defined(__MACH__)) - // Adapted from /usr/include/byteswap.h. Not available on Mac. - if (__builtin_constant_p(host_int)) { - return __bswap_constant_64(host_int); - } else { - register uint64_t result; - __asm__("bswap %0" : "=r"(result) : "0"(host_int)); - return result; - } -#elif defined(__GLIBC__) - return bswap_64(host_int); -#else - return (((x & GG_ULONGLONG(0xFF)) << 56) | ((x & GG_ULONGLONG(0xFF00)) << 40) | - ((x & GG_ULONGLONG(0xFF0000)) << 24) | ((x & GG_ULONGLONG(0xFF000000)) << 8) | - ((x & GG_ULONGLONG(0xFF00000000)) >> 8) | ((x & GG_ULONGLONG(0xFF0000000000)) >> 24) | - ((x & GG_ULONGLONG(0xFF000000000000)) >> 40) | - ((x & GG_ULONGLONG(0xFF00000000000000)) >> 56)); -#endif // bswap_64 -} - -inline uint32_t gbswap_32(uint32_t host_int) { -#if defined(__GLIBC__) - return bswap_32(host_int); -#else - return (((x & 0xFF) << 24) | ((x & 0xFF00) << 8) | ((x & 0xFF0000) >> 8) | - ((x & 0xFF000000) >> 24)); -#endif -} - -inline uint16 gbswap_16(uint16 host_int) { -#if defined(__GLIBC__) - return bswap_16(host_int); -#else - return (uint16)(((x & 0xFF) << 8) | ((x & 0xFF00) >> 8)); // NOLINT -#endif -} - -#endif // intrinics available - -#ifdef ABSL_IS_LITTLE_ENDIAN - -// Definitions for ntohl etc. that don't require us to include -// netinet/in.h. We wrap gbswap_32 and gbswap_16 in functions rather -// than just #defining them because in debug mode, gcc doesn't -// correctly handle the (rather involved) definitions of bswap_32. -// gcc guarantees that inline functions are as fast as macros, so -// this isn't a performance hit. -inline uint16 ghtons(uint16 x) { - return gbswap_16(x); -} -inline uint32_t ghtonl(uint32_t x) { - return gbswap_32(x); -} -inline uint64_t ghtonll(uint64_t x) { - return gbswap_64(x); -} - -#elif defined ABSL_IS_BIG_ENDIAN - -// These definitions are simpler on big-endian machines -// These are functions instead of macros to avoid self-assignment warnings -// on calls such as "i = ghtnol(i);". This also provides type checking. -inline uint16 ghtons(uint16 x) { - return x; -} -inline uint32_t ghtonl(uint32_t x) { - return x; -} -inline uint64_t ghtonll(uint64_t x) { - return x; -} - -#else -#error \ - "Unsupported byte order: Either ABSL_IS_BIG_ENDIAN or " \ - "ABSL_IS_LITTLE_ENDIAN must be defined" -#endif // byte order - -inline uint16 gntohs(uint16 x) { - return ghtons(x); -} -inline uint32_t gntohl(uint32_t x) { - return ghtonl(x); -} -inline uint64_t gntohll(uint64_t x) { - return ghtonll(x); -} - -// Utilities to convert numbers between the current hosts's native byte -// order and little-endian byte order -// -// Load/Store methods are alignment safe -namespace little_endian { -// Conversion functions. -#ifdef ABSL_IS_LITTLE_ENDIAN - -inline uint16 FromHost16(uint16 x) { - return x; -} -inline uint16 ToHost16(uint16 x) { - return x; -} - -inline uint32_t FromHost32(uint32_t x) { - return x; -} -inline uint32_t ToHost32(uint32_t x) { - return x; -} - -inline uint64_t FromHost64(uint64_t x) { - return x; -} -inline uint64_t ToHost64(uint64_t x) { - return x; -} - -inline constexpr bool IsLittleEndian() { - return true; -} - -#elif defined ABSL_IS_BIG_ENDIAN - -inline uint16 FromHost16(uint16 x) { - return gbswap_16(x); -} -inline uint16 ToHost16(uint16 x) { - return gbswap_16(x); -} - -inline uint32_t FromHost32(uint32_t x) { - return gbswap_32(x); -} -inline uint32_t ToHost32(uint32_t x) { - return gbswap_32(x); -} - -inline uint64_t FromHost64(uint64_t x) { - return gbswap_64(x); -} -inline uint64_t ToHost64(uint64_t x) { - return gbswap_64(x); -} - -inline constexpr bool IsLittleEndian() { - return false; -} - -#endif /* ENDIAN */ - -// Functions to do unaligned loads and stores in little-endian order. -inline uint16 Load16(const void *p) { - return ToHost16(UNALIGNED_LOAD16(p)); -} - -inline void Store16(void *p, uint16 v) { - UNALIGNED_STORE16(p, FromHost16(v)); -} - -inline uint32_t Load32(const void *p) { - return ToHost32(UNALIGNED_LOAD32(p)); -} - -inline void Store32(void *p, uint32_t v) { - UNALIGNED_STORE32(p, FromHost32(v)); -} - -inline uint64_t Load64(const void *p) { - return ToHost64(UNALIGNED_LOAD64(p)); -} - -inline void Store64(void *p, uint64_t v) { - UNALIGNED_STORE64(p, FromHost64(v)); -} - -} // namespace little_endian - -// Utilities to convert numbers between the current hosts's native byte -// order and big-endian byte order (same as network byte order) -// -// Load/Store methods are alignment safe -namespace big_endian { -#ifdef ABSL_IS_LITTLE_ENDIAN - -inline uint16 FromHost16(uint16 x) { - return gbswap_16(x); -} -inline uint16 ToHost16(uint16 x) { - return gbswap_16(x); -} - -inline uint32_t FromHost32(uint32_t x) { - return gbswap_32(x); -} -inline uint32_t ToHost32(uint32_t x) { - return gbswap_32(x); -} - -inline uint64_t FromHost64(uint64_t x) { - return gbswap_64(x); -} -inline uint64_t ToHost64(uint64_t x) { - return gbswap_64(x); -} - -inline constexpr bool IsLittleEndian() { - return true; -} - -#elif defined ABSL_IS_BIG_ENDIAN - -inline uint16 FromHost16(uint16 x) { - return x; -} -inline uint16 ToHost16(uint16 x) { - return x; -} - -inline uint32_t FromHost32(uint32_t x) { - return x; -} -inline uint32_t ToHost32(uint32_t x) { - return x; -} - -inline uint64_t FromHost64(uint64_t x) { - return x; -} -inline uint64_t ToHost64(uint64_t x) { - return x; -} - -inline constexpr bool IsLittleEndian() { - return false; -} - -#endif /* ENDIAN */ - -// Functions to do unaligned loads and stores in big-endian order. -inline uint16 Load16(const void *p) { - return ToHost16(UNALIGNED_LOAD16(p)); -} - -inline void Store16(void *p, uint16 v) { - UNALIGNED_STORE16(p, FromHost16(v)); -} - -inline uint32_t Load32(const void *p) { - return ToHost32(UNALIGNED_LOAD32(p)); -} - -inline void Store32(void *p, uint32_t v) { - UNALIGNED_STORE32(p, FromHost32(v)); -} - -inline uint64_t Load64(const void *p) { - return ToHost64(UNALIGNED_LOAD64(p)); -} - -inline void Store64(void *p, uint64_t v) { - UNALIGNED_STORE64(p, FromHost64(v)); -} - -} // namespace big_endian - -} // namespace absl - -#endif // ABSL_BASE_INTERNAL_ENDIAN_H_ |