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/* functable.h -- Struct containing function pointers to optimized functions
* Copyright (C) 2017 Hans Kristian Rosbach
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#ifndef FUNCTABLE_H_
#define FUNCTABLE_H_
#include "deflate.h"
#ifdef DISABLE_RUNTIME_CPU_DETECTION
# include "arch_functions.h"
/* When compiling with native instructions it is not necessary to use functable.
* Instead we use native_ macro indicating the best available variant of arch-specific
* functions for the current platform.
*/
# define FUNCTABLE_INIT ((void)0)
# define FUNCTABLE_CALL(name) native_ ## name
# define FUNCTABLE_FPTR(name) &native_ ## name
#else
struct functable_s {
int (* force_init) (void);
uint32_t (* adler32) (uint32_t adler, const uint8_t *buf, size_t len);
uint32_t (* adler32_copy) (uint32_t adler, uint8_t *dst, const uint8_t *src, size_t len);
uint8_t* (* chunkmemset_safe) (uint8_t *out, uint8_t *from, size_t len, size_t left);
uint32_t (* compare256) (const uint8_t *src0, const uint8_t *src1);
uint32_t (* crc32) (uint32_t crc, const uint8_t *buf, size_t len);
uint32_t (* crc32_copy) (uint32_t crc, uint8_t *dst, const uint8_t *src, size_t len);
void (* inflate_fast) (PREFIX3(stream) *strm, uint32_t start);
uint32_t (* longest_match) (deflate_state *const s, uint32_t cur_match);
uint32_t (* longest_match_slow) (deflate_state *const s, uint32_t cur_match);
void (* slide_hash) (deflate_state *s);
};
Z_INTERNAL extern struct functable_s functable;
/* Explicitly indicate functions are conditionally dispatched.
*/
# define FUNCTABLE_INIT if (functable.force_init()) {return Z_VERSION_ERROR;}
# define FUNCTABLE_CALL(name) functable.name
# define FUNCTABLE_FPTR(name) functable.name
#endif
#endif
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