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/*
* lib_common.h - internal header included by all library code
*/
#ifndef LIB_LIB_COMMON_H
#define LIB_LIB_COMMON_H
#ifdef LIBDEFLATE_H
# error "lib_common.h must always be included before libdeflate.h"
/* because BUILDING_LIBDEFLATE must be set first */
#endif
#define BUILDING_LIBDEFLATE
#include "../common/common_defs.h"
/*
* Prefix with "_libdeflate_" all global symbols which are not part of the API
* and don't already have a "libdeflate" prefix. This avoids exposing overly
* generic names when libdeflate is built as a static library.
*
* Note that the chosen prefix is not really important and can be changed
* without breaking library users. It was just chosen so that the resulting
* symbol names are unlikely to conflict with those from any other software.
* Also note that this fixup has no useful effect when libdeflate is built as a
* shared library, since these symbols are not exported.
*/
#define SYM_FIXUP(sym) _libdeflate_##sym
#define deflate_get_compression_level SYM_FIXUP(deflate_get_compression_level)
#define _cpu_features SYM_FIXUP(_cpu_features)
#define setup_cpu_features SYM_FIXUP(setup_cpu_features)
void *libdeflate_malloc(size_t size);
void libdeflate_free(void *ptr);
void *libdeflate_aligned_malloc(size_t alignment, size_t size);
void libdeflate_aligned_free(void *ptr);
#ifdef FREESTANDING
/*
* With -ffreestanding, <string.h> may be missing, and we must provide
* implementations of memset(), memcpy(), memmove(), and memcmp().
* See https://gcc.gnu.org/onlinedocs/gcc/Standards.html
*
* Also, -ffreestanding disables interpreting calls to these functions as
* built-ins. E.g., calling memcpy(&v, p, WORDBYTES) will make a function call,
* not be optimized to a single load instruction. For performance reasons we
* don't want that. So, declare these functions as macros that expand to the
* corresponding built-ins. This approach is recommended in the gcc man page.
* We still need the actual function definitions in case gcc calls them.
*/
void *memset(void *s, int c, size_t n);
#define memset(s, c, n) __builtin_memset((s), (c), (n))
void *memcpy(void *dest, const void *src, size_t n);
#define memcpy(dest, src, n) __builtin_memcpy((dest), (src), (n))
void *memmove(void *dest, const void *src, size_t n);
#define memmove(dest, src, n) __builtin_memmove((dest), (src), (n))
int memcmp(const void *s1, const void *s2, size_t n);
#define memcmp(s1, s2, n) __builtin_memcmp((s1), (s2), (n))
#else
#include <string.h>
#endif
#endif /* LIB_LIB_COMMON_H */
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