zxc_deps.h

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/* SPDX-License-Identifier: BSD-3-Clause */
/*
 * ZXC - High-performance lossless compression
 *
 * Copyright (c) Bertrand Lebonnois and contributors.
 */
 
#ifndef ZXC_DEPS_H
#define ZXC_DEPS_H
 
#include <assert.h>
#include <limits.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
 
#ifndef ZXC_MALLOC
#define ZXC_MALLOC(size) malloc(size)
#endif
 
#ifndef ZXC_CALLOC
#define ZXC_CALLOC(nmemb, size) calloc(nmemb, size)
#endif
 
#ifndef ZXC_REALLOC
#define ZXC_REALLOC(ptr, size) realloc(ptr, size)
#endif
 
#ifndef ZXC_FREE
#define ZXC_FREE(ptr) free(ptr)
#endif
 
 
#if defined(ZXC_ALIGNED_MALLOC) != defined(ZXC_ALIGNED_FREE)
#error "ZXC_ALIGNED_MALLOC and ZXC_ALIGNED_FREE are overridden together"
#endif
 
#ifndef ZXC_ALIGNED_MALLOC
 
static inline void* zxc_aligned_malloc(const size_t size, const size_t alignment) {
#if defined(_WIN32)
    return _aligned_malloc(size, alignment);
#else
    void* ptr = NULL;
    if (posix_memalign(&ptr, alignment, size) != 0) return NULL;
    return ptr;
#endif
}
 
static inline void zxc_aligned_free(void* ptr) {
#if defined(_WIN32)
    _aligned_free(ptr);
#else
    free(ptr);
#endif
}
 
#define ZXC_ALIGNED_MALLOC(size, alignment) zxc_aligned_malloc(size, alignment)
#define ZXC_ALIGNED_FREE(ptr) zxc_aligned_free(ptr)
 
#endif  // ZXC_ALIGNED_MALLOC
 
 
#if defined(ZXC_POPCOUNT32) != defined(ZXC_POPCOUNT64)
#error "ZXC_POPCOUNT32 and ZXC_POPCOUNT64 are overridden together"
#endif
 
#ifndef ZXC_POPCOUNT32
#if defined(__GNUC__) || defined(__clang__)
#define ZXC_POPCOUNT32(v) __builtin_popcount(v)
#define ZXC_POPCOUNT64(v) __builtin_popcountll(v)
#else
static inline int zxc_popcount32(const uint32_t v) {
    uint32_t x = v - ((v >> 1) & 0x55555555U);
    x = (x & 0x33333333U) + ((x >> 2) & 0x33333333U);
    x = (x + (x >> 4)) & 0x0F0F0F0FU;
    return (int)((x * 0x01010101U) >> 24);
}
static inline int zxc_popcount64(const uint64_t v) {
    return zxc_popcount32((uint32_t)v) + zxc_popcount32((uint32_t)(v >> 32));
}
#define ZXC_POPCOUNT32(v) zxc_popcount32(v)
#define ZXC_POPCOUNT64(v) zxc_popcount64(v)
#endif
#endif  // ZXC_POPCOUNT32
 
 
 
#endif /* ZXC_DEPS_H */