Function reallocf

tools/compat/reallocf.c:30–46

#include "compat.h"

void *
reallocf(void *ptr, size_t size)
{
	void *nptr;

	nptr = realloc(ptr, size);

	/*
	 * When the System V compatibility option (malloc "V" flag) is
	 * in effect, realloc(ptr, 0) frees the memory and returns NULL.
	 * So, to avoid double free, call free() only when size != 0.
	 * realloc(ptr, 0) can't fail when ptr != NULL.
	 */
	if (!nptr && ptr && size != 0)
		free(ptr);
	return (nptr);
}