freebsd-dev/contrib/libreadline/xmalloc.c

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/* xmalloc.c -- safe versions of malloc and realloc */
/* Copyright (C) 1991 Free Software Foundation, Inc.
This file is part of GNU Readline, a library for reading lines
of text with interactive input and history editing.
Readline is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any
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later version.
Readline 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 Readline; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
#define READLINE_LIBRARY
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#if defined (HAVE_CONFIG_H)
#include <config.h>
#endif
#include <stdio.h>
#if defined (HAVE_STDLIB_H)
# include <stdlib.h>
#else
# include "ansi_stdlib.h"
#endif /* HAVE_STDLIB_H */
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#include "xmalloc.h"
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/* **************************************************************** */
/* */
/* Memory Allocation and Deallocation. */
/* */
/* **************************************************************** */
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static void
memory_error_and_abort (fname)
char *fname;
{
fprintf (stderr, "%s: out of virtual memory\n", fname);
exit (2);
}
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/* Return a pointer to free()able block of memory large enough
to hold BYTES number of bytes. If the memory cannot be allocated,
print an error message and abort. */
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PTR_T
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xmalloc (bytes)
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size_t bytes;
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{
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PTR_T temp;
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temp = malloc (bytes);
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if (temp == 0)
memory_error_and_abort ("xmalloc");
return (temp);
}
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PTR_T
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xrealloc (pointer, bytes)
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PTR_T pointer;
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size_t bytes;
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{
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PTR_T temp;
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temp = pointer ? realloc (pointer, bytes) : malloc (bytes);
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if (temp == 0)
memory_error_and_abort ("xrealloc");
return (temp);
}
/* Use this as the function to call when adding unwind protects so we
don't need to know what free() returns. */
void
xfree (string)
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PTR_T string;
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{
if (string)
free (string);
}