0cbd5c0e4f
The "at most" branch was never taken since all call sites in var.c only ever need a substring, and the target buffer is not limited. Therefore rename the function and make it simpler. It's ok that bmake_strldup is defined as estrndup in case of USE_EMALLOC since that function's implementation is compatible to the "copy exactly", it just contains some extra null checks that will never match since the variable values cannot (well, or should not) contain null bytes. Theoretically they can, but the behavior then depends on the exact implementation and is unreliable, therefore nobody does this. After all, Makefiles are used for text processing, not for binary data.
107 lines
2.6 KiB
C
107 lines
2.6 KiB
C
/* $NetBSD: make_malloc.c,v 1.15 2020/08/20 06:35:14 rillig Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2009 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifdef MAKE_NATIVE
|
|
#include <sys/cdefs.h>
|
|
__RCSID("$NetBSD: make_malloc.c,v 1.15 2020/08/20 06:35:14 rillig Exp $");
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
|
|
#include "make.h"
|
|
|
|
#ifndef USE_EMALLOC
|
|
static MAKE_ATTR_DEAD void enomem(void);
|
|
|
|
/*
|
|
* enomem --
|
|
* die when out of memory.
|
|
*/
|
|
static MAKE_ATTR_DEAD void
|
|
enomem(void)
|
|
{
|
|
(void)fprintf(stderr, "%s: %s.\n", progname, strerror(ENOMEM));
|
|
exit(2);
|
|
}
|
|
|
|
/*
|
|
* bmake_malloc --
|
|
* malloc, but die on error.
|
|
*/
|
|
void *
|
|
bmake_malloc(size_t len)
|
|
{
|
|
void *p;
|
|
|
|
if ((p = malloc(len)) == NULL)
|
|
enomem();
|
|
return p;
|
|
}
|
|
|
|
/*
|
|
* bmake_strdup --
|
|
* strdup, but die on error.
|
|
*/
|
|
char *
|
|
bmake_strdup(const char *str)
|
|
{
|
|
size_t len;
|
|
char *p;
|
|
|
|
len = strlen(str) + 1;
|
|
if ((p = malloc(len)) == NULL)
|
|
enomem();
|
|
return memcpy(p, str, len);
|
|
}
|
|
|
|
/* Allocate a string starting from str with exactly len characters. */
|
|
char *
|
|
bmake_strldup(const char *str, size_t len)
|
|
{
|
|
char *p = bmake_malloc(len + 1);
|
|
memcpy(p, str, len);
|
|
p[len] = '\0';
|
|
return p;
|
|
}
|
|
|
|
/*
|
|
* bmake_realloc --
|
|
* realloc, but die on error.
|
|
*/
|
|
void *
|
|
bmake_realloc(void *ptr, size_t size)
|
|
{
|
|
if ((ptr = realloc(ptr, size)) == NULL)
|
|
enomem();
|
|
return ptr;
|
|
}
|
|
#endif
|