mirror of
https://github.com/shadps4-emu/ext-zlib-ng.git
synced 2024-10-07 00:13:58 +00:00
130055e8d1
Deflate used to call allocate 5 times during init. - 5 calls to external alloc function now becomes 1 - Handling alignment of allocated buffers is simplified - Efforts to align the allocated buffer now needs to happen only once. - Individual buffers are ordered so that they have natural sequential alignment. - Due to reduced losses to alignment, we allocate less memory in total. - While doing alloc(), we now store pointer to corresponding free(), avoiding crashes with applications that incorrectly set alloc/free pointers after running init function. - Removed need for extra padding after window, chunked reads can now go beyond the window buffer without causing a segfault. Co-authored-by: Ilya Leoshkevich <iii@linux.ibm.com>
328 lines
10 KiB
C
328 lines
10 KiB
C
#ifndef _ZBUILD_H
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#define _ZBUILD_H
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#define _POSIX_SOURCE 1 /* fileno */
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#ifndef _POSIX_C_SOURCE
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# define _POSIX_C_SOURCE 200809L /* snprintf, posix_memalign, strdup */
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#endif
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#ifndef _ISOC11_SOURCE
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# define _ISOC11_SOURCE 1 /* aligned_alloc */
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#endif
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#ifdef __OpenBSD__
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# define _BSD_SOURCE 1
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#endif
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#include <stddef.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdint.h>
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/* Determine compiler version of C Standard */
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#ifdef __STDC_VERSION__
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# if __STDC_VERSION__ >= 199901L
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# ifndef STDC99
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# define STDC99
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# endif
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# endif
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# if __STDC_VERSION__ >= 201112L
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# ifndef STDC11
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# define STDC11
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# endif
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# endif
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#endif
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#ifndef Z_HAS_ATTRIBUTE
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# if defined(__has_attribute)
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# define Z_HAS_ATTRIBUTE(a) __has_attribute(a)
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# else
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# define Z_HAS_ATTRIBUTE(a) 0
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# endif
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#endif
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#ifndef Z_FALLTHROUGH
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# if Z_HAS_ATTRIBUTE(__fallthrough__) || (defined(__GNUC__) && (__GNUC__ >= 7))
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# define Z_FALLTHROUGH __attribute__((__fallthrough__))
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# else
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# define Z_FALLTHROUGH do {} while(0) /* fallthrough */
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# endif
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#endif
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#ifndef Z_TARGET
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# if Z_HAS_ATTRIBUTE(__target__)
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# define Z_TARGET(x) __attribute__((__target__(x)))
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# else
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# define Z_TARGET(x)
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# endif
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#endif
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/* This has to be first include that defines any types */
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#if defined(_MSC_VER)
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# if defined(_WIN64)
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typedef __int64 ssize_t;
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# else
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typedef long ssize_t;
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# endif
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# if defined(_WIN64)
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#define SSIZE_MAX _I64_MAX
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# else
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#define SSIZE_MAX LONG_MAX
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# endif
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#endif
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/* MS Visual Studio does not allow inline in C, only C++.
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But it provides __inline instead, so use that. */
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#if defined(_MSC_VER) && !defined(inline) && !defined(__cplusplus)
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# define inline __inline
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#endif
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#if defined(ZLIB_COMPAT)
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# define PREFIX(x) x
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# define PREFIX2(x) ZLIB_ ## x
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# define PREFIX3(x) z_ ## x
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# define PREFIX4(x) x ## 64
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# define zVersion zlibVersion
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#else
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# define PREFIX(x) zng_ ## x
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# define PREFIX2(x) ZLIBNG_ ## x
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# define PREFIX3(x) zng_ ## x
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# define PREFIX4(x) zng_ ## x
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# define zVersion zlibng_version
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# define z_size_t size_t
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#endif
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/* In zlib-compat some functions and types use unsigned long, but zlib-ng use size_t */
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#if defined(ZLIB_COMPAT)
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# define z_uintmax_t unsigned long
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#else
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# define z_uintmax_t size_t
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#endif
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/* Minimum of a and b. */
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#define MIN(a, b) ((a) > (b) ? (b) : (a))
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/* Maximum of a and b. */
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#define MAX(a, b) ((a) < (b) ? (b) : (a))
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/* Ignore unused variable warning */
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#define Z_UNUSED(var) (void)(var)
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#if defined(HAVE_VISIBILITY_INTERNAL)
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# define Z_INTERNAL __attribute__((visibility ("internal")))
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#elif defined(HAVE_VISIBILITY_HIDDEN)
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# define Z_INTERNAL __attribute__((visibility ("hidden")))
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#else
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# define Z_INTERNAL
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#endif
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/* Symbol versioning helpers, allowing multiple versions of a function to exist.
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* Functions using this must also be added to zlib-ng.map for each version.
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* Double @@ means this is the default for newly compiled applications to link against.
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* Single @ means this is kept for backwards compatibility.
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* This is only used for Zlib-ng native API, and only on platforms supporting this.
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*/
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#if defined(HAVE_SYMVER)
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# define ZSYMVER(func,alias,ver) __asm__(".symver " func ", " alias "@ZLIB_NG_" ver);
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# define ZSYMVER_DEF(func,alias,ver) __asm__(".symver " func ", " alias "@@ZLIB_NG_" ver);
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#else
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# define ZSYMVER(func,alias,ver)
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# define ZSYMVER_DEF(func,alias,ver)
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#endif
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#ifndef __cplusplus
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# define Z_REGISTER register
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#else
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# define Z_REGISTER
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#endif
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/* Reverse the bytes in a value. Use compiler intrinsics when
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possible to take advantage of hardware implementations. */
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#if defined(_MSC_VER) && (_MSC_VER >= 1300)
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# include <stdlib.h>
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# pragma intrinsic(_byteswap_ulong)
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# define ZSWAP16(q) _byteswap_ushort(q)
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# define ZSWAP32(q) _byteswap_ulong(q)
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# define ZSWAP64(q) _byteswap_uint64(q)
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#elif defined(__clang__) || (defined(__GNUC__) && \
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(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)))
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# define ZSWAP16(q) __builtin_bswap16(q)
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# define ZSWAP32(q) __builtin_bswap32(q)
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# define ZSWAP64(q) __builtin_bswap64(q)
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#elif defined(__GNUC__) && (__GNUC__ >= 2) && defined(__linux__)
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# include <byteswap.h>
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# define ZSWAP16(q) bswap_16(q)
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# define ZSWAP32(q) bswap_32(q)
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# define ZSWAP64(q) bswap_64(q)
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#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__)
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# include <sys/endian.h>
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# define ZSWAP16(q) bswap16(q)
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# define ZSWAP32(q) bswap32(q)
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# define ZSWAP64(q) bswap64(q)
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#elif defined(__OpenBSD__)
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# include <sys/endian.h>
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# define ZSWAP16(q) swap16(q)
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# define ZSWAP32(q) swap32(q)
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# define ZSWAP64(q) swap64(q)
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#elif defined(__INTEL_COMPILER)
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/* ICC does not provide a two byte swap. */
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# define ZSWAP16(q) ((((q) & 0xff) << 8) | (((q) & 0xff00) >> 8))
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# define ZSWAP32(q) _bswap(q)
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# define ZSWAP64(q) _bswap64(q)
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#else
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# define ZSWAP16(q) ((((q) & 0xff) << 8) | (((q) & 0xff00) >> 8))
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# define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
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(((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
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# define ZSWAP64(q) \
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(((q & 0xFF00000000000000u) >> 56u) | \
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((q & 0x00FF000000000000u) >> 40u) | \
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((q & 0x0000FF0000000000u) >> 24u) | \
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((q & 0x000000FF00000000u) >> 8u) | \
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((q & 0x00000000FF000000u) << 8u) | \
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((q & 0x0000000000FF0000u) << 24u) | \
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((q & 0x000000000000FF00u) << 40u) | \
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((q & 0x00000000000000FFu) << 56u))
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#endif
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/* Only enable likely/unlikely if the compiler is known to support it */
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#if (defined(__GNUC__) && (__GNUC__ >= 3)) || defined(__INTEL_COMPILER) || defined(__clang__)
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# define LIKELY_NULL(x) __builtin_expect((x) != 0, 0)
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# define LIKELY(x) __builtin_expect(!!(x), 1)
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# define UNLIKELY(x) __builtin_expect(!!(x), 0)
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#else
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# define LIKELY_NULL(x) x
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# define LIKELY(x) x
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# define UNLIKELY(x) x
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#endif /* (un)likely */
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#if defined(HAVE_ATTRIBUTE_ALIGNED)
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# define ALIGNED_(x) __attribute__ ((aligned(x)))
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#elif defined(_MSC_VER)
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# define ALIGNED_(x) __declspec(align(x))
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#endif
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#ifdef HAVE_BUILTIN_ASSUME_ALIGNED
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# define HINT_ALIGNED(p,n) __builtin_assume_aligned((void *)(p),(n))
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#else
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# define HINT_ALIGNED(p,n) (p)
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#endif
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#define HINT_ALIGNED_16(p) HINT_ALIGNED((p),16)
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#define HINT_ALIGNED_64(p) HINT_ALIGNED((p),64)
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#define HINT_ALIGNED_4096(p) HINT_ALIGNED((p),4096)
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/* PADSZ returns needed bytes to pad bpos to pad size
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* PAD_NN calculates pad size and adds it to bpos, returning the result.
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* All take an integer or a pointer as bpos input.
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*/
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#define PADSZ(bpos, pad) (((pad) - ((uintptr_t)(bpos) % (pad))) % (pad))
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#define PAD_16(bpos) ((bpos) + PADSZ((bpos),16))
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#define PAD_64(bpos) ((bpos) + PADSZ((bpos),64))
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#define PAD_4096(bpos) ((bpos) + PADSZ((bpos),4096))
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/* Diagnostic functions */
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#ifdef ZLIB_DEBUG
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# include <stdio.h>
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extern int Z_INTERNAL z_verbose;
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extern void Z_INTERNAL z_error(const char *m);
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# define Assert(cond, msg) {if (!(cond)) z_error(msg);}
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# define Trace(x) {if (z_verbose >= 0) fprintf x;}
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# define Tracev(x) {if (z_verbose > 0) fprintf x;}
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# define Tracevv(x) {if (z_verbose > 1) fprintf x;}
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# define Tracec(c, x) {if (z_verbose > 0 && (c)) fprintf x;}
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# define Tracecv(c, x) {if (z_verbose > 1 && (c)) fprintf x;}
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#else
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# define Assert(cond, msg)
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# define Trace(x)
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# define Tracev(x)
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# define Tracevv(x)
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# define Tracec(c, x)
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# define Tracecv(c, x)
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#endif
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#ifndef NO_UNALIGNED
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# if defined(__x86_64__) || defined(_M_X64) || defined(__amd64__) || defined(_M_AMD64)
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# define UNALIGNED_OK
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# define UNALIGNED64_OK
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# elif defined(__i386__) || defined(__i486__) || defined(__i586__) || \
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defined(__i686__) || defined(_X86_) || defined(_M_IX86)
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# define UNALIGNED_OK
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# elif defined(__aarch64__) || defined(_M_ARM64) || defined(_M_ARM64EC)
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# if (defined(__GNUC__) && defined(__ARM_FEATURE_UNALIGNED)) || !defined(__GNUC__)
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# define UNALIGNED_OK
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# define UNALIGNED64_OK
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# endif
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# elif defined(__arm__) || (_M_ARM >= 7)
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# if (defined(__GNUC__) && defined(__ARM_FEATURE_UNALIGNED)) || !defined(__GNUC__)
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# define UNALIGNED_OK
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# endif
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# elif defined(__powerpc64__) || defined(__ppc64__)
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# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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# define UNALIGNED_OK
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# define UNALIGNED64_OK
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# endif
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# endif
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#endif
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#if defined(__has_feature)
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# if __has_feature(address_sanitizer)
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# define Z_ADDRESS_SANITIZER 1
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# endif
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#elif defined(__SANITIZE_ADDRESS__)
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# define Z_ADDRESS_SANITIZER 1
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#endif
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/*
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* __asan_loadN() and __asan_storeN() calls are inserted by compilers in order to check memory accesses.
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* They can be called manually too, with the following caveats:
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* gcc says: "warning: implicit declaration of function ‘...’"
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* g++ says: "error: new declaration ‘...’ ambiguates built-in declaration ‘...’"
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* Accommodate both.
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*/
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#ifdef Z_ADDRESS_SANITIZER
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#ifndef __cplusplus
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void __asan_loadN(void *, long);
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void __asan_storeN(void *, long);
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#endif
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#else
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# define __asan_loadN(a, size) do { Z_UNUSED(a); Z_UNUSED(size); } while (0)
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# define __asan_storeN(a, size) do { Z_UNUSED(a); Z_UNUSED(size); } while (0)
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#endif
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#if defined(__has_feature)
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# if __has_feature(memory_sanitizer)
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# define Z_MEMORY_SANITIZER 1
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# include <sanitizer/msan_interface.h>
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# endif
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#endif
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#ifndef Z_MEMORY_SANITIZER
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# define __msan_check_mem_is_initialized(a, size) do { Z_UNUSED(a); Z_UNUSED(size); } while (0)
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# define __msan_unpoison(a, size) do { Z_UNUSED(a); Z_UNUSED(size); } while (0)
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#endif
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/* Notify sanitizer runtime about an upcoming read access. */
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#define instrument_read(a, size) do { \
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void *__a = (void *)(a); \
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long __size = size; \
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__asan_loadN(__a, __size); \
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__msan_check_mem_is_initialized(__a, __size); \
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} while (0)
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/* Notify sanitizer runtime about an upcoming write access. */
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#define instrument_write(a, size) do { \
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void *__a = (void *)(a); \
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long __size = size; \
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__asan_storeN(__a, __size); \
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} while (0)
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/* Notify sanitizer runtime about an upcoming read/write access. */
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#define instrument_read_write(a, size) do { \
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void *__a = (void *)(a); \
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long __size = size; \
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__asan_storeN(__a, __size); \
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__msan_check_mem_is_initialized(__a, __size); \
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} while (0)
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#endif
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