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Reorganize zstd_deps.h and mem.h + replace mem.h for the kernel

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This commit is contained in:
Nick Terrell
2020-09-24 19:41:59 -07:00
parent 260fc75028
commit 9ae0483858
9 changed files with 409 additions and 93 deletions
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lib/common/zstd_deps.h
+9 -46
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@@ -8,19 +8,18 @@
* You may select, at your option, one of the above-listed licenses.
*/
/* This file provides common libc dependencies that zstd requires.
* The purpose is to allow replacing this file with a custom implementation
* to compile zstd without libc support.
*/
/* Need:
* NULL
* INT_MAX
* UINT_MAX
* ZSTD_memcpy()
* ZSTD_memset()
* ZSTD_memmove()
* BYTE
* S16
* U16
* U32
* U64
* size_t
* ptrdiff_t
* INT_MAX
* ...
*/
#ifndef ZSTD_DEPS_COMMON
#define ZSTD_DEPS_COMMON
@@ -39,40 +38,6 @@
# define ZSTD_memset(p,v,l) memset((p),(v),(l))
#endif
/*-**************************************************************
* Basic Types
*****************************************************************/
#if !defined (__VMS) && (defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
# include <stdint.h>
typedef uint8_t BYTE;
typedef uint16_t U16;
typedef int16_t S16;
typedef uint32_t U32;
typedef int32_t S32;
typedef uint64_t U64;
typedef int64_t S64;
#else
# include <limits.h>
#if CHAR_BIT != 8
# error "this implementation requires char to be exactly 8-bit type"
#endif
typedef unsigned char BYTE;
#if USHRT_MAX != 65535
# error "this implementation requires short to be exactly 16-bit type"
#endif
typedef unsigned short U16;
typedef signed short S16;
#if UINT_MAX != 4294967295
# error "this implementation requires int to be exactly 32-bit type"
#endif
typedef unsigned int U32;
typedef signed int S32;
/* note : there are no limits defined for long long type in C90.
* limits exist in C99, however, in such case, <stdint.h> is preferred */
typedef unsigned long long U64;
typedef signed long long S64;
#endif
#endif /* ZSTD_DEPS_COMMON */
/* Need:
@@ -102,9 +67,7 @@
#ifndef ZSTD_DEPS_MATH64
#define ZSTD_DEPS_MATH64
static U64 ZSTD_div64(U64 dividend, U32 divisor) {
return dividend / divisor;
}
#define ZSTD_div64(dividend, divisor) ((dividend) / (divisor))
#endif /* ZSTD_DEPS_MATH64 */
#endif /* ZSTD_DEPS_NEED_MATH64 */