[wasi-libc.git] / basics / sources / reallocarray.c

#include <stdlib.h>
#include <errno.h>

void *__reallocarray(void *ptr, size_t nmemb, size_t size) {
    size_t bytes;
    if (__builtin_umull_overflow(nmemb, size, &bytes)) {
        errno = ENOMEM;
        return NULL;
    }
    return realloc(ptr, bytes);
}

void *reallocarray(void *ptr, size_t nmemb, size_t size)
    __attribute__((__weak__, __alias__("__reallocarray")));
Commit	Line	Data
ad03c82d DG	1	#include <stdlib.h>
	2	#include <errno.h>
	3
	4	void __reallocarray(void ptr, size_t nmemb, size_t size) {
	5	size_t bytes;
	6	if (__builtin_umull_overflow(nmemb, size, &bytes)) {
	7	errno = ENOMEM;
	8	return NULL;
	9	}
	10	return realloc(ptr, bytes);
	11	}
	12
	13	void reallocarray(void ptr, size_t nmemb, size_t size)
	14	__attribute__((__weak__, __alias__("__reallocarray")));