1 /* 2 * Copyright (c) Facebook, Inc. 3 * All rights reserved. 4 * 5 * This source code is licensed under both the BSD-style license (found in the 6 * LICENSE file in the root directory of this source tree) and the GPLv2 (found 7 * in the COPYING file in the root directory of this source tree). 8 * You may select, at your option, one of the above-listed licenses. 9 */ 10 11 /* This file provides common libc dependencies that zstd requires. 12 * The purpose is to allow replacing this file with a custom implementation 13 * to compile zstd without libc support. 14 */ 15 16 /* Need: 17 * NULL 18 * INT_MAX 19 * UINT_MAX 20 * ZSTD_memcpy() 21 * ZSTD_memset() 22 * ZSTD_memmove() 23 */ 24 #ifndef ZSTD_DEPS_COMMON 25 #define ZSTD_DEPS_COMMON 26 27 #include <limits.h> 28 #include <stddef.h> 29 #include <string.h> 30 31 #if defined(__GNUC__) && __GNUC__ >= 4 32 # define ZSTD_memcpy(d,s,l) __builtin_memcpy((d),(s),(l)) 33 # define ZSTD_memmove(d,s,l) __builtin_memmove((d),(s),(l)) 34 # define ZSTD_memset(p,v,l) __builtin_memset((p),(v),(l)) 35 #else 36 # define ZSTD_memcpy(d,s,l) memcpy((d),(s),(l)) 37 # define ZSTD_memmove(d,s,l) memmove((d),(s),(l)) 38 # define ZSTD_memset(p,v,l) memset((p),(v),(l)) 39 #endif 40 41 #endif /* ZSTD_DEPS_COMMON */ 42 43 /* Need: 44 * ZSTD_malloc() 45 * ZSTD_free() 46 * ZSTD_calloc() 47 */ 48 #ifdef ZSTD_DEPS_NEED_MALLOC 49 #ifndef ZSTD_DEPS_MALLOC 50 #define ZSTD_DEPS_MALLOC 51 52 #include <stdlib.h> 53 54 #define ZSTD_malloc(s) malloc(s) 55 #define ZSTD_calloc(n,s) calloc((n), (s)) 56 #define ZSTD_free(p) free((p)) 57 58 #endif /* ZSTD_DEPS_MALLOC */ 59 #endif /* ZSTD_DEPS_NEED_MALLOC */ 60 61 /* 62 * Provides 64-bit math support. 63 * Need: 64 * U64 ZSTD_div64(U64 dividend, U32 divisor) 65 */ 66 #ifdef ZSTD_DEPS_NEED_MATH64 67 #ifndef ZSTD_DEPS_MATH64 68 #define ZSTD_DEPS_MATH64 69 70 #define ZSTD_div64(dividend, divisor) ((dividend) / (divisor)) 71 72 #endif /* ZSTD_DEPS_MATH64 */ 73 #endif /* ZSTD_DEPS_NEED_MATH64 */ 74 75 /* Need: 76 * assert() 77 */ 78 #ifdef ZSTD_DEPS_NEED_ASSERT 79 #ifndef ZSTD_DEPS_ASSERT 80 #define ZSTD_DEPS_ASSERT 81 82 #include <assert.h> 83 84 #endif /* ZSTD_DEPS_ASSERT */ 85 #endif /* ZSTD_DEPS_NEED_ASSERT */ 86 87 /* Need: 88 * ZSTD_DEBUG_PRINT() 89 */ 90 #ifdef ZSTD_DEPS_NEED_IO 91 #ifndef ZSTD_DEPS_IO 92 #define ZSTD_DEPS_IO 93 94 #include <stdio.h> 95 #define ZSTD_DEBUG_PRINT(...) fprintf(stderr, __VA_ARGS__) 96 97 #endif /* ZSTD_DEPS_IO */ 98 #endif /* ZSTD_DEPS_NEED_IO */ 99 100 /* Only requested when <stdint.h> is known to be present. 101 * Need: 102 * intptr_t 103 */ 104 #ifdef ZSTD_DEPS_NEED_STDINT 105 #ifndef ZSTD_DEPS_STDINT 106 #define ZSTD_DEPS_STDINT 107 108 #include <stdint.h> 109 110 #endif /* ZSTD_DEPS_STDINT */ 111 #endif /* ZSTD_DEPS_NEED_STDINT */ 112