| #ifndef _ZBUILD_H |
| #define _ZBUILD_H |
| |
| #define _POSIX_SOURCE 1 /* fileno */ |
| #ifndef _POSIX_C_SOURCE |
| # define _POSIX_C_SOURCE 200809L /* snprintf, posix_memalign, strdup */ |
| #endif |
| #ifndef _ISOC11_SOURCE |
| # define _ISOC11_SOURCE 1 /* aligned_alloc */ |
| #endif |
| |
| #include <stddef.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include <stdint.h> |
| |
| /* Determine compiler version of C Standard */ |
| #ifdef __STDC_VERSION__ |
| # if __STDC_VERSION__ >= 199901L |
| # ifndef STDC99 |
| # define STDC99 |
| # endif |
| # endif |
| # if __STDC_VERSION__ >= 201112L |
| # ifndef STDC11 |
| # define STDC11 |
| # endif |
| # endif |
| #endif |
| |
| /* Determine compiler support for TLS */ |
| #ifndef Z_TLS |
| # ifdef HAVE_THREAD_LOCAL |
| # define Z_TLS _Thread_local |
| # elif defined(__GNUC__) || defined(__SUNPRO_C) |
| # define Z_TLS __thread |
| # elif defined(_WIN32) && (defined(_MSC_VER) || defined(__ICL)) |
| # define Z_TLS __declspec(thread) |
| # else |
| # warning Unable to detect Thread Local Storage support. |
| # define Z_TLS |
| # endif |
| #endif |
| |
| #ifndef Z_HAS_ATTRIBUTE |
| # if defined(__has_attribute) |
| # define Z_HAS_ATTRIBUTE(a) __has_attribute(a) |
| # else |
| # define Z_HAS_ATTRIBUTE(a) 0 |
| # endif |
| #endif |
| |
| #ifndef Z_FALLTHROUGH |
| # if Z_HAS_ATTRIBUTE(__fallthrough__) || (defined(__GNUC__) && (__GNUC__ >= 7)) |
| # define Z_FALLTHROUGH __attribute__((__fallthrough__)) |
| # else |
| # define Z_FALLTHROUGH do {} while(0) /* fallthrough */ |
| # endif |
| #endif |
| |
| /* This has to be first include that defines any types */ |
| #if defined(_MSC_VER) |
| # if defined(_WIN64) |
| typedef __int64 ssize_t; |
| # else |
| typedef long ssize_t; |
| # endif |
| |
| # if defined(_WIN64) |
| #define SSIZE_MAX _I64_MAX |
| # else |
| #define SSIZE_MAX LONG_MAX |
| # endif |
| #endif |
| |
| /* MS Visual Studio does not allow inline in C, only C++. |
| But it provides __inline instead, so use that. */ |
| #if defined(_MSC_VER) && !defined(inline) && !defined(__cplusplus) |
| # define inline __inline |
| #endif |
| |
| #if defined(ZLIB_COMPAT) |
| # define PREFIX(x) x |
| # define PREFIX2(x) ZLIB_ ## x |
| # define PREFIX3(x) z_ ## x |
| # define PREFIX4(x) x ## 64 |
| # define zVersion zlibVersion |
| # define z_size_t unsigned long |
| #else |
| # define PREFIX(x) zng_ ## x |
| # define PREFIX2(x) ZLIBNG_ ## x |
| # define PREFIX3(x) zng_ ## x |
| # define PREFIX4(x) zng_ ## x |
| # define zVersion zlibng_version |
| # define z_size_t size_t |
| #endif |
| |
| /* Minimum of a and b. */ |
| #define MIN(a, b) ((a) > (b) ? (b) : (a)) |
| /* Maximum of a and b. */ |
| #define MAX(a, b) ((a) < (b) ? (b) : (a)) |
| /* Ignore unused variable warning */ |
| #define Z_UNUSED(var) (void)(var) |
| |
| #if defined(HAVE_VISIBILITY_INTERNAL) |
| # define Z_INTERNAL __attribute__((visibility ("internal"))) |
| #elif defined(HAVE_VISIBILITY_HIDDEN) |
| # define Z_INTERNAL __attribute__((visibility ("hidden"))) |
| #else |
| # define Z_INTERNAL |
| #endif |
| |
| #ifndef __cplusplus |
| # define Z_REGISTER register |
| #else |
| # define Z_REGISTER |
| #endif |
| |
| /* Reverse the bytes in a value. Use compiler intrinsics when |
| possible to take advantage of hardware implementations. */ |
| #if defined(_MSC_VER) && (_MSC_VER >= 1300) |
| # include <stdlib.h> |
| # pragma intrinsic(_byteswap_ulong) |
| # define ZSWAP16(q) _byteswap_ushort(q) |
| # define ZSWAP32(q) _byteswap_ulong(q) |
| # define ZSWAP64(q) _byteswap_uint64(q) |
| |
| #elif defined(__clang__) || (defined(__GNUC__) && \ |
| (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8))) |
| # define ZSWAP16(q) __builtin_bswap16(q) |
| # define ZSWAP32(q) __builtin_bswap32(q) |
| # define ZSWAP64(q) __builtin_bswap64(q) |
| |
| #elif defined(__GNUC__) && (__GNUC__ >= 2) && defined(__linux__) |
| # include <byteswap.h> |
| # define ZSWAP16(q) bswap_16(q) |
| # define ZSWAP32(q) bswap_32(q) |
| # define ZSWAP64(q) bswap_64(q) |
| |
| #elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) |
| # include <sys/endian.h> |
| # define ZSWAP16(q) bswap16(q) |
| # define ZSWAP32(q) bswap32(q) |
| # define ZSWAP64(q) bswap64(q) |
| #elif defined(__OpenBSD__) |
| # include <sys/endian.h> |
| # define ZSWAP16(q) swap16(q) |
| # define ZSWAP32(q) swap32(q) |
| # define ZSWAP64(q) swap64(q) |
| #elif defined(__INTEL_COMPILER) |
| /* ICC does not provide a two byte swap. */ |
| # define ZSWAP16(q) ((((q) & 0xff) << 8) | (((q) & 0xff00) >> 8)) |
| # define ZSWAP32(q) _bswap(q) |
| # define ZSWAP64(q) _bswap64(q) |
| |
| #else |
| # define ZSWAP16(q) ((((q) & 0xff) << 8) | (((q) & 0xff00) >> 8)) |
| # define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \ |
| (((q) & 0xff00) << 8) + (((q) & 0xff) << 24)) |
| # define ZSWAP64(q) \ |
| (((q & 0xFF00000000000000u) >> 56u) | \ |
| ((q & 0x00FF000000000000u) >> 40u) | \ |
| ((q & 0x0000FF0000000000u) >> 24u) | \ |
| ((q & 0x000000FF00000000u) >> 8u) | \ |
| ((q & 0x00000000FF000000u) << 8u) | \ |
| ((q & 0x0000000000FF0000u) << 24u) | \ |
| ((q & 0x000000000000FF00u) << 40u) | \ |
| ((q & 0x00000000000000FFu) << 56u)) |
| #endif |
| |
| /* Only enable likely/unlikely if the compiler is known to support it */ |
| #if (defined(__GNUC__) && (__GNUC__ >= 3)) || defined(__INTEL_COMPILER) || defined(__clang__) |
| # define LIKELY_NULL(x) __builtin_expect((x) != 0, 0) |
| # define LIKELY(x) __builtin_expect(!!(x), 1) |
| # define UNLIKELY(x) __builtin_expect(!!(x), 0) |
| # define PREFETCH_L1(addr) __builtin_prefetch(addr, 0, 3) |
| # define PREFETCH_L2(addr) __builtin_prefetch(addr, 0, 2) |
| # define PREFETCH_RW(addr) __builtin_prefetch(addr, 1, 2) |
| #elif defined(__WIN__) |
| # include <xmmintrin.h> |
| # define LIKELY_NULL(x) x |
| # define LIKELY(x) x |
| # define UNLIKELY(x) x |
| # define PREFETCH_L1(addr) _mm_prefetch((char *) addr, _MM_HINT_T0) |
| # define PREFETCH_L2(addr) _mm_prefetch((char *) addr, _MM_HINT_T1) |
| # define PREFETCH_RW(addr) _mm_prefetch((char *) addr, _MM_HINT_T1) |
| #else |
| # define LIKELY_NULL(x) x |
| # define LIKELY(x) x |
| # define UNLIKELY(x) x |
| # define PREFETCH_L1(addr) addr |
| # define PREFETCH_L2(addr) addr |
| # define PREFETCH_RW(addr) addr |
| #endif /* (un)likely */ |
| |
| #if defined(__clang__) || defined(__GNUC__) |
| # define ALIGNED_(x) __attribute__ ((aligned(x))) |
| #elif defined(_MSC_VER) |
| # define ALIGNED_(x) __declspec(align(x)) |
| #endif |
| |
| /* Diagnostic functions */ |
| #ifdef ZLIB_DEBUG |
| # include <stdio.h> |
| extern int Z_INTERNAL z_verbose; |
| extern void Z_INTERNAL z_error(char *m); |
| # define Assert(cond, msg) {if (!(cond)) z_error(msg);} |
| # define Trace(x) {if (z_verbose >= 0) fprintf x;} |
| # define Tracev(x) {if (z_verbose > 0) fprintf x;} |
| # define Tracevv(x) {if (z_verbose > 1) fprintf x;} |
| # define Tracec(c, x) {if (z_verbose > 0 && (c)) fprintf x;} |
| # define Tracecv(c, x) {if (z_verbose > 1 && (c)) fprintf x;} |
| #else |
| # define Assert(cond, msg) |
| # define Trace(x) |
| # define Tracev(x) |
| # define Tracevv(x) |
| # define Tracec(c, x) |
| # define Tracecv(c, x) |
| #endif |
| |
| #ifndef NO_UNALIGNED |
| # if defined(__x86_64__) || defined(_M_X64) || defined(__amd64__) || defined(_M_AMD64) |
| # define UNALIGNED_OK |
| # define UNALIGNED64_OK |
| # elif defined(__i386__) || defined(__i486__) || defined(__i586__) || \ |
| defined(__i686__) || defined(_X86_) || defined(_M_IX86) |
| # define UNALIGNED_OK |
| # elif defined(__aarch64__) || defined(_M_ARM64) |
| # if (defined(__GNUC__) && defined(__ARM_FEATURE_UNALIGNED)) || !defined(__GNUC__) |
| # define UNALIGNED_OK |
| # define UNALIGNED64_OK |
| # endif |
| # elif defined(__arm__) || (_M_ARM >= 7) |
| # if (defined(__GNUC__) && defined(__ARM_FEATURE_UNALIGNED)) || !defined(__GNUC__) |
| # define UNALIGNED_OK |
| # endif |
| # elif defined(__powerpc64__) || defined(__ppc64__) |
| # if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
| # define UNALIGNED_OK |
| # define UNALIGNED64_OK |
| # endif |
| # endif |
| #endif |
| |
| /* Force compiler to emit unaligned memory comparisons if unaligned access is supported |
| on the architecture, otherwise don't assume unaligned access is supported. Older |
| compilers don't optimize memcmp calls for all integer types to unaligned access instructions |
| when it is supported on the architecture resulting in significant performance impact. */ |
| #ifdef UNALIGNED_OK |
| # define zmemcmp_2(str1, str2) (*((uint16_t *)(str1)) != *((uint16_t *)(str2))) |
| # define zmemcmp_4(str1, str2) (*((uint32_t *)(str1)) != *((uint32_t *)(str2))) |
| # if defined(UNALIGNED64_OK) && (UINTPTR_MAX == UINT64_MAX) |
| # define zmemcmp_8(str1, str2) (*((uint64_t *)(str1)) != *((uint64_t *)(str2))) |
| # else |
| # define zmemcmp_8(str1, str2) (((uint32_t *)(str1))[0] != ((uint32_t *)(str2))[0] || \ |
| ((uint32_t *)(str1))[1] != ((uint32_t *)(str2))[1]) |
| # endif |
| #else |
| # define zmemcmp_2(str1, str2) memcmp(str1, str2, 2) |
| # define zmemcmp_4(str1, str2) memcmp(str1, str2, 4) |
| # define zmemcmp_8(str1, str2) memcmp(str1, str2, 8) |
| #endif |
| |
| #if defined(__has_feature) |
| # if __has_feature(memory_sanitizer) |
| # define Z_MEMORY_SANITIZER 1 |
| # include <sanitizer/msan_interface.h> |
| # endif |
| #endif |
| |
| #endif |
