112 lines
2.4 KiB
C++
112 lines
2.4 KiB
C++
/*
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* Copyright (c) 2016-2020, Facebook, Inc.
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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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#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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