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138 lines
2.5 KiB
C
138 lines
2.5 KiB
C
/* $OpenBSD$ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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* All rights reserved
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* Versions of malloc and friends that check their results, and never return
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* failure (they call fatal if they encounter an error).
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*
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* As far as I am concerned, the code I have written for this software
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* can be used freely for any purpose. Any derived versions of this
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* software must be clearly marked as such, and if the derived work is
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* incompatible with the protocol description in the RFC file, it must be
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* called by a name other than "ssh" or "Secure Shell".
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*/
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#include <errno.h>
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#include <limits.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "tmux.h"
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void *
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xmalloc(size_t size)
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{
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void *ptr;
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if (size == 0)
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fatal("xmalloc: zero size");
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ptr = malloc(size);
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if (ptr == NULL)
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fatal("xmalloc: allocating %zu bytes: %s",
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size, strerror(errno));
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return ptr;
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}
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void *
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xcalloc(size_t nmemb, size_t size)
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{
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void *ptr;
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if (size == 0 || nmemb == 0)
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fatal("xcalloc: zero size");
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ptr = calloc(nmemb, size);
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if (ptr == NULL)
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fatal("xcalloc: allocating %zu * %zu bytes: %s",
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nmemb, size, strerror(errno));
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return ptr;
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}
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void *
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xrealloc(void *ptr, size_t size)
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{
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return xreallocarray(ptr, 1, size);
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}
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void *
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xreallocarray(void *ptr, size_t nmemb, size_t size)
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{
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void *new_ptr;
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if (nmemb == 0 || size == 0)
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fatal("xreallocarray: zero size");
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new_ptr = reallocarray(ptr, nmemb, size);
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if (new_ptr == NULL)
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fatal("xreallocarray: allocating %zu * %zu bytes: %s",
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nmemb, size, strerror(errno));
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return new_ptr;
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}
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char *
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xstrdup(const char *str)
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{
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char *cp;
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if ((cp = strdup(str)) == NULL)
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fatal("xstrdup: %s", strerror(errno));
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return cp;
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}
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int
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xasprintf(char **ret, const char *fmt, ...)
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{
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va_list ap;
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int i;
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va_start(ap, fmt);
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i = xvasprintf(ret, fmt, ap);
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va_end(ap);
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return i;
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}
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int
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xvasprintf(char **ret, const char *fmt, va_list ap)
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{
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int i;
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i = vasprintf(ret, fmt, ap);
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if (i < 0 || *ret == NULL)
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fatal("xasprintf: %s", strerror(errno));
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return i;
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}
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int
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xsnprintf(char *str, size_t len, const char *fmt, ...)
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{
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va_list ap;
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int i;
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va_start(ap, fmt);
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i = xvsnprintf(str, len, fmt, ap);
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va_end(ap);
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return i;
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}
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int
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xvsnprintf(char *str, size_t len, const char *fmt, va_list ap)
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{
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int i;
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if (len > INT_MAX)
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fatal("xsnprintf: len > INT_MAX");
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i = vsnprintf(str, len, fmt, ap);
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if (i < 0 || i >= (int)len)
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fatal("xsnprintf: overflow");
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return i;
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}
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