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/* Miscellaneous allocations functions for GNU Make.
Copyright (C) 1988-2014 Free Software Foundation, Inc.
This file is part of GNU Make.
GNU Make is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3 of the License, or (at your option) any later
version.
GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <http://www.gnu.org/licenses/>. */
#include "makeint.h"
/* Like malloc but get fatal error if memory is exhausted. */
/* Don't bother if we're using dmalloc; it provides these for us. */
#ifndef HAVE_DMALLOC_H
#undef xmalloc
#undef xcalloc
#undef xrealloc
#undef xstrdup
void *
xmalloc (unsigned int size)
{
/* Make sure we don't allocate 0, for pre-ISO implementations. */
void *result = malloc (size ? size : 1);
if (result == 0)
OUT_OF_MEM();
return result;
}
void *
xcalloc (unsigned int size)
{
/* Make sure we don't allocate 0, for pre-ISO implementations. */
void *result = calloc (size ? size : 1, 1);
if (result == 0)
OUT_OF_MEM();
return result;
}
void *
xrealloc (void *ptr, unsigned int size)
{
void *result;
/* Some older implementations of realloc() don't conform to ISO. */
if (! size)
size = 1;
result = ptr ? realloc (ptr, size) : malloc (size);
if (result == 0)
OUT_OF_MEM();
return result;
}
char *
xstrdup (const char *ptr)
{
char *result;
#ifdef HAVE_STRDUP
result = strdup (ptr);
#else
result = malloc (strlen (ptr) + 1);
#endif
if (result == 0)
OUT_OF_MEM();
#ifdef HAVE_STRDUP
return result;
#else
return strcpy (result, ptr);
#endif
}
#endif /* HAVE_DMALLOC_H */
char *
xstrndup (const char *str, unsigned int length)
{
char *result;
#ifdef HAVE_STRNDUP
result = strndup (str, length);
if (result == 0)
OUT_OF_MEM();
#else
result = xmalloc (length + 1);
if (length > 0)
strncpy (result, str, length);
result[length] = '\0';
#endif
return result;
}
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