tmux/xmalloc.c
2007-10-03 13:07:42 +00:00

239 lines
4.4 KiB
C

/* $Id: xmalloc.c,v 1.4 2007-10-03 13:07:42 nicm Exp $ */
/*
* Copyright (c) 2004 Nicholas Marriott <nicm@users.sourceforge.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <errno.h>
#include <libgen.h>
#include <stdlib.h>
#include <string.h>
#include "tmux.h"
void *
ensure_for(void *buf, size_t *len, size_t size, size_t adj)
{
if (adj == 0)
fatalx("zero adj");
if (SIZE_MAX - size < adj)
fatalx("size + adj > SIZE_MAX");
size += adj;
if (*len == 0) {
*len = BUFSIZ;
buf = xmalloc(*len);
}
while (*len <= size) {
buf = xrealloc(buf, 2, *len);
*len *= 2;
}
return (buf);
}
void *
ensure_size(void *buf, size_t *len, size_t nmemb, size_t size)
{
if (nmemb == 0 || size == 0)
fatalx("zero size");
if (SIZE_MAX / nmemb < size)
fatalx("nmemb * size > SIZE_MAX");
if (*len == 0) {
*len = BUFSIZ;
buf = xmalloc(*len);
}
while (*len <= nmemb * size) {
buf = xrealloc(buf, 2, *len);
*len *= 2;
}
return (buf);
}
char *
xmemstrdup(const char *buf, size_t len)
{
char *s;
s = xmalloc(len + 1);
if (len > 0)
memcpy(s, buf, len);
s[len] = '\0';
return (s);
}
char *
xstrdup(const char *s)
{
void *ptr;
size_t len;
len = strlen(s) + 1;
ptr = xmalloc(len);
return (strncpy(ptr, s, len));
}
void *
xcalloc(size_t nmemb, size_t size)
{
void *ptr;
if (size == 0 || nmemb == 0)
fatalx("zero size");
if (SIZE_MAX / nmemb < size)
fatalx("nmemb * size > SIZE_MAX");
if ((ptr = calloc(nmemb, size)) == NULL)
fatal("xcalloc failed");
#ifdef DEBUG
xmalloc_new(xmalloc_caller(), ptr, nmemb * size);
#endif
return (ptr);
}
void *
xmalloc(size_t size)
{
void *ptr;
if (size == 0)
fatalx("zero size");
if ((ptr = malloc(size)) == NULL)
fatal("xmalloc failed");
#ifdef DEBUG
xmalloc_new(xmalloc_caller(), ptr, size);
#endif
return (ptr);
}
void *
xrealloc(void *oldptr, size_t nmemb, size_t size)
{
size_t newsize = nmemb * size;
void *newptr;
if (newsize == 0)
fatalx("zero size");
if (SIZE_MAX / nmemb < size)
fatalx("nmemb * size > SIZE_MAX");
if ((newptr = realloc(oldptr, newsize)) == NULL)
fatal("xrealloc failed");
#ifdef DEBUG
xmalloc_change(xmalloc_caller(), oldptr, newptr, nmemb * size);
#endif
return (newptr);
}
void
xfree(void *ptr)
{
if (ptr == NULL)
fatalx("null pointer");
free(ptr);
#ifdef DEBUG
xmalloc_free(ptr);
#endif
}
int printflike2
xasprintf(char **ret, const char *fmt, ...)
{
va_list ap;
int i;
va_start(ap, fmt);
i = xvasprintf(ret, fmt, ap);
va_end(ap);
return (i);
}
int
xvasprintf(char **ret, const char *fmt, va_list ap)
{
int i;
i = vasprintf(ret, fmt, ap);
if (i < 0 || *ret == NULL)
fatal("xvasprintf failed");
#ifdef DEBUG
xmalloc_new(xmalloc_caller(), *ret, i + 1);
#endif
return (i);
}
int printflike3
xsnprintf(char *buf, size_t len, const char *fmt, ...)
{
va_list ap;
int i;
va_start(ap, fmt);
i = xvsnprintf(buf, len, fmt, ap);
va_end(ap);
return (i);
}
int
xvsnprintf(char *buf, size_t len, const char *fmt, va_list ap)
{
int i;
if (len > INT_MAX)
fatalx("len > INT_MAX");
i = vsnprintf(buf, len, fmt, ap);
if (i < 0)
fatal("vsnprintf failed");
return (i);
}
/*
* Some systems modify the path in place. This function and xbasename below
* avoid that by using a temporary buffer.
*/
char *
xdirname(const char *src)
{
static char dst[MAXPATHLEN];
strlcpy(dst, src, sizeof dst);
return (dirname(dst));
}
char *
xbasename(const char *src)
{
static char dst[MAXPATHLEN];
strlcpy(dst, src, sizeof dst);
return (basename(dst));
}