memory.c

这是一个C的源代码

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "pbc_memory.h"

static void *default_pbc_malloc(size_t size)
{
    void *res = malloc(size);
    if (!res) {
	fprintf(stderr, "PBC: malloc() error\n");
	exit(1);
    }
    return res;
}

static void *default_pbc_realloc(void *ptr, size_t size)
{
    void *res = realloc(ptr, size);
    if (!res) {
	fprintf(stderr, "PBC: realloc() error\n");
	exit(1);
    }
    return res;
}

static void default_pbc_free(void *ptr)
{
    free(ptr);
}

void *(*pbc_malloc)(size_t) = default_pbc_malloc;
void *(*pbc_realloc)(void *, size_t) = default_pbc_realloc;
void (*pbc_free)(void *) = default_pbc_free;

void pbc_set_memory_functions(void *(*malloc_fn)(size_t),
	void *(*realloc_fn)(void *, size_t), void (*free_fn)(void *))
{
    pbc_malloc = malloc_fn;
    pbc_realloc = realloc_fn;
    pbc_free = free_fn;
}

void *pbc_calloc(size_t nmemb, size_t size)
{
    void *res = pbc_malloc(nmemb * size);
    memset(res, 0, nmemb * size);
    return res;
}

char *pbc_strdup(const char *s)
{
    int len = strlen(s);
    char *res = pbc_malloc(len + 1);
    strcpy(res, s);
    return res;
}