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Kitware
GitHub Repository: Kitware/CMake
 Path: blob/master/Utilities/cmzstd/lib/common/zstd_deps.h
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/*

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 * Copyright (c) Meta Platforms, Inc. and affiliates.

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 * All rights reserved.

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 *

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 * This source code is licensed under both the BSD-style license (found in the

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 * LICENSE file in the root directory of this source tree) and the GPLv2 (found

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 * in the COPYING file in the root directory of this source tree).

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 * You may select, at your option, one of the above-listed licenses.

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 */

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/* This file provides common libc dependencies that zstd requires.

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 * The purpose is to allow replacing this file with a custom implementation

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 * to compile zstd without libc support.

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 */

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/* Need:

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 * NULL

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 * INT_MAX

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 * UINT_MAX

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 * ZSTD_memcpy()

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 * ZSTD_memset()

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 * ZSTD_memmove()

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 */

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#ifndef ZSTD_DEPS_COMMON

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#define ZSTD_DEPS_COMMON

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/* Even though we use qsort_r only for the dictionary builder, the macro

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 * _GNU_SOURCE has to be declared *before* the inclusion of any standard

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 * header and the script 'combine.sh' combines the whole zstd source code

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 * in a single file.

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 */

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#if defined(__linux) || defined(__linux__) || defined(linux) || defined(__gnu_linux__) || \

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    defined(__CYGWIN__) || defined(__MSYS__)

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#if !defined(_GNU_SOURCE) && !defined(__ANDROID__) /* NDK doesn't ship qsort_r(). */

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#define _GNU_SOURCE

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#endif

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#endif

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#include <limits.h>

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#include <stddef.h>

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#include <string.h>

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#if defined(__GNUC__) && __GNUC__ >= 4

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# define ZSTD_memcpy(d,s,l) __builtin_memcpy((d),(s),(l))

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# define ZSTD_memmove(d,s,l) __builtin_memmove((d),(s),(l))

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# define ZSTD_memset(p,v,l) __builtin_memset((p),(v),(l))

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#else

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# define ZSTD_memcpy(d,s,l) memcpy((d),(s),(l))

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# define ZSTD_memmove(d,s,l) memmove((d),(s),(l))

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# define ZSTD_memset(p,v,l) memset((p),(v),(l))

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#endif

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#endif /* ZSTD_DEPS_COMMON */

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/* Need:

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 * ZSTD_malloc()

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 * ZSTD_free()

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 * ZSTD_calloc()

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 */

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#ifdef ZSTD_DEPS_NEED_MALLOC

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#ifndef ZSTD_DEPS_MALLOC

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#define ZSTD_DEPS_MALLOC

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#include <stdlib.h>

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#define ZSTD_malloc(s) malloc(s)

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#define ZSTD_calloc(n,s) calloc((n), (s))

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#define ZSTD_free(p) free((p))

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#endif /* ZSTD_DEPS_MALLOC */

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#endif /* ZSTD_DEPS_NEED_MALLOC */

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/*

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 * Provides 64-bit math support.

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 * Need:

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 * U64 ZSTD_div64(U64 dividend, U32 divisor)

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 */

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#ifdef ZSTD_DEPS_NEED_MATH64

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#ifndef ZSTD_DEPS_MATH64

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#define ZSTD_DEPS_MATH64

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#define ZSTD_div64(dividend, divisor) ((dividend) / (divisor))

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#endif /* ZSTD_DEPS_MATH64 */

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#endif /* ZSTD_DEPS_NEED_MATH64 */

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/* Need:

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 * assert()

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 */

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#ifdef ZSTD_DEPS_NEED_ASSERT

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#ifndef ZSTD_DEPS_ASSERT

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#define ZSTD_DEPS_ASSERT

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#include <assert.h>

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#endif /* ZSTD_DEPS_ASSERT */

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#endif /* ZSTD_DEPS_NEED_ASSERT */

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/* Need:

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 * ZSTD_DEBUG_PRINT()

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 */

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#ifdef ZSTD_DEPS_NEED_IO

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#ifndef ZSTD_DEPS_IO

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#define ZSTD_DEPS_IO

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#include <stdio.h>

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#define ZSTD_DEBUG_PRINT(...) fprintf(stderr, __VA_ARGS__)

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#endif /* ZSTD_DEPS_IO */

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#endif /* ZSTD_DEPS_NEED_IO */

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/* Only requested when <stdint.h> is known to be present.

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 * Need:

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 * intptr_t

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 */

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#ifdef ZSTD_DEPS_NEED_STDINT

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#ifndef ZSTD_DEPS_STDINT

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#define ZSTD_DEPS_STDINT

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#include <stdint.h>

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#endif /* ZSTD_DEPS_STDINT */

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#endif /* ZSTD_DEPS_NEED_STDINT */

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