/* * This file is part of John the Ripper password cracker, * Copyright (c) 1996-98 by Solar Designer */#include <stdio.h>#include <stdlib.h>#include <string.h>#include "arch.h"#include "misc.h"#include "memory.h"unsigned int mem_saving_level = 0;void *mem_alloc(size_t size){	void *res;	if (!(res = malloc(size))) pexit("malloc");	return res;}void mem_free(void **ptr){	if (*ptr) free(*ptr);	*ptr = NULL;}void *mem_alloc_tiny(size_t size, size_t align){	static unsigned long buffer, bufree = 0;	unsigned long start, end;#if ARCH_ALLOWS_UNALIGNED	if (mem_saving_level > 2) align = MEM_ALIGN_NONE;#endif	start = buffer + --align; start &= ~align;	end = start + size;	if (bufree >= end - buffer) {		bufree -= end - buffer;		buffer = end;	} else	if (size + align <= MEM_ALLOC_SIZE && bufree <= MEM_ALLOC_MAX) {		buffer = (unsigned long)mem_alloc(MEM_ALLOC_SIZE);		bufree = MEM_ALLOC_SIZE;		return mem_alloc_tiny(size, align + 1);	} else		start = ((unsigned long)			mem_alloc(size + align) + align) & ~align;	return (void *)start;}void *mem_alloc_copy(size_t size, size_t align, void *src){	return memcpy(mem_alloc_tiny(size, align), src, size);}char *str_alloc_copy(char *src){	size_t size;	if (!src || !*src) return "";	size = strlen(src) + 1;	return (char *)memcpy(mem_alloc_tiny(size, MEM_ALIGN_NONE), src, size);}