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Diffstat (limited to 'neozip/zbuild.h')
| -rw-r--r-- | neozip/zbuild.h | 352 |
1 files changed, 352 insertions, 0 deletions
diff --git a/neozip/zbuild.h b/neozip/zbuild.h new file mode 100644 index 0000000000..16a9d0d774 --- /dev/null +++ b/neozip/zbuild.h @@ -0,0 +1,352 @@ +#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 +#ifdef __OpenBSD__ +# define _BSD_SOURCE 1 +#endif + +#include <stddef.h> +#include <string.h> +#include <stdlib.h> +#include <stdint.h> +#include <stdio.h> + +#include "zarch.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 + +#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 + +/* Hint to compiler that a block of code is unreachable, typically in a switch default condition */ +#ifndef Z_UNREACHABLE +# if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L +# if !defined(unreachable) && defined(_MSC_VER) +# define Z_UNREACHABLE() __assume(0) +# else +# define Z_UNREACHABLE() unreachable() // C23 approach +# endif +# elif (defined(__GNUC__) && (__GNUC__ >= 5)) || defined(__clang__) +# define Z_UNREACHABLE() __builtin_unreachable() +# else +# define Z_UNREACHABLE() +# endif +#endif + +#ifndef Z_TARGET +# if Z_HAS_ATTRIBUTE(__target__) +# define Z_TARGET(x) __attribute__((__target__(x))) +# else +# define Z_TARGET(x) +# 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 + +/* A forced inline decorator */ +#if defined(_MSC_VER) +# define Z_FORCEINLINE __forceinline +#elif defined(__GNUC__) +# define Z_FORCEINLINE inline __attribute__((always_inline)) +#else + /* It won't actually force inlining but it will suggest it */ +# define Z_FORCEINLINE inline +#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 +#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 + +/* In zlib-compat some functions and types use unsigned long, but zlib-ng use size_t */ +#if defined(ZLIB_COMPAT) +# define z_uintmax_t unsigned long +#else +# define z_uintmax_t size_t +#endif + +/* In zlib-compat headers some function return values and parameter types use int or unsigned, but zlib-ng headers use + int32_t and uint32_t, which will cause type mismatch when compiling zlib-ng if int32_t is long and uint32_t is + unsigned long */ +#if defined(ZLIB_COMPAT) +# define z_int32_t int +# define z_uint32_t unsigned int +#else +# define z_int32_t int32_t +# define z_uint32_t uint32_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)) +/* Absolute value of a. */ +#define ABS(a) ((a) < 0 ? -(a) : (a)) +/* Ignore unused variable warning */ +#define Z_UNUSED(var) (void)(var) + +/* Force the compiler to treat variable as modified. Empty asm statement with a "+r" constraint prevents + the compiler from reordering or eliminating loads into the variable. This can help keep critical latency + chains in the hot path from being shortened or optimized away. */ +#if (defined(__GNUC__) || defined(__clang__)) && \ + (defined(ARCH_X86) || (defined(ARCH_ARM) && defined(ARCH_64BIT))) +# define Z_TOUCH(var) __asm__ ("" : "+r"(var)) +#else +# define Z_TOUCH(var) (void)(var) +#endif + +#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 + +/* Symbol versioning helpers, allowing multiple versions of a function to exist. + * Functions using this must also be added to zlib-ng.map for each version. + * Double @@ means this is the default for newly compiled applications to link against. + * Single @ means this is kept for backwards compatibility. + * This is only used for Zlib-ng native API, and only on platforms supporting this. + */ +#if defined(HAVE_SYMVER) +# define ZSYMVER(func,alias,ver) __asm__(".symver " func ", " alias "@ZLIB_NG_" ver); +# define ZSYMVER_DEF(func,alias,ver) __asm__(".symver " func ", " alias "@@ZLIB_NG_" ver); +#else +# define ZSYMVER(func,alias,ver) +# define ZSYMVER_DEF(func,alias,ver) +#endif + +#ifndef __cplusplus +# define Z_REGISTER register +#else +# define Z_REGISTER +#endif + +#if defined(_MSC_VER) +# define Z_RESTRICT __restrict +#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L +# define Z_RESTRICT restrict +#else +# define Z_RESTRICT __restrict__ +#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) +#else +# define LIKELY_NULL(x) x +# define LIKELY(x) x +# define UNLIKELY(x) x +#endif /* (un)likely */ + +#if defined(HAVE_ATTRIBUTE_ALIGNED) +# define ALIGNED_(x) __attribute__ ((aligned(x))) +#elif defined(_MSC_VER) +# define ALIGNED_(x) __declspec(align(x)) +#else +/* TODO: Define ALIGNED_ for your compiler */ +# define ALIGNED_(x) +#endif + +#ifdef HAVE_BUILTIN_ASSUME_ALIGNED +# define HINT_ALIGNED(p,n) __builtin_assume_aligned((void *)(p),(n)) +#else +# define HINT_ALIGNED(p,n) (p) +#endif +#define HINT_ALIGNED_16(p) HINT_ALIGNED((p),16) +#define HINT_ALIGNED_64(p) HINT_ALIGNED((p),64) +#define HINT_ALIGNED_4096(p) HINT_ALIGNED((p),4096) + +/* Number of bytes needed to align ptr to the next alignment boundary */ +#define ALIGN_DIFF(ptr, align) \ + (((uintptr_t)(align) - ((uintptr_t)(ptr) & ((align) - 1))) & ((align) - 1)) + +/* Round up value to the nearest multiple of align (align must be power of 2) */ +#define ALIGN_UP(value, align) \ + (((value) + ((align) - 1)) & ~((align) - 1)) + +/* Round down value to the nearest multiple of align (align must be power of 2) */ +#define ALIGN_DOWN(value, align) \ + ((value) & ~((align) - 1)) + +/* PADSZ returns needed bytes to pad bpos to pad size + * PAD_NN calculates pad size and adds it to bpos, returning the result. + * All take an integer or a pointer as bpos input. + */ +#define PADSZ(bpos, pad) (((pad) - ((uintptr_t)(bpos) % (pad))) % (pad)) +#define PAD_16(bpos) ((bpos) + PADSZ((bpos),16)) +#define PAD_64(bpos) ((bpos) + PADSZ((bpos),64)) +#define PAD_4096(bpos) ((bpos) + PADSZ((bpos),4096)) + +/* Diagnostic functions */ +#ifdef ZLIB_DEBUG + extern int Z_INTERNAL z_verbose; + extern void Z_INTERNAL z_error(const char *m); +# define Assert(cond, msg) {int _cond = (cond); 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 + +/* OPTIMAL_CMP values determine the comparison width: + * 64: Best for 64-bit architectures with unaligned access + * 32: Best for 32-bit architectures with unaligned access + * 16: Safe default for unknown architectures + * 8: Safe fallback for architectures without unaligned access + * Note: The unaligned access mentioned is cpu-support, this allows compiler or + * separate unaligned intrinsics to utilize safe unaligned access, without + * utilizing unaligned C pointers that are known to have undefined behavior. + */ +#if !defined(OPTIMAL_CMP) +# ifdef ARCH_64BIT +# ifdef ARCH_ARM +# if defined(__ARM_FEATURE_UNALIGNED) || defined(_WIN32) +# define OPTIMAL_CMP 64 +# else +# define OPTIMAL_CMP 8 +# endif +# else +# define OPTIMAL_CMP 64 +# endif +# elif defined(ARCH_32BIT) +# ifdef ARCH_ARM +# if defined(__ARM_FEATURE_UNALIGNED) || defined(_WIN32) +# define OPTIMAL_CMP 32 +# else +# define OPTIMAL_CMP 8 +# endif +# else +# define OPTIMAL_CMP 32 +# endif +# endif +#endif +#if !defined(OPTIMAL_CMP) +# define OPTIMAL_CMP 16 +#endif + +#endif |