Imported from ../bash-2.0.tar.gz.

1 files changed, 119 insertions, 0 deletions

diff --git a/xmalloc.c b/xmalloc.c
new file mode 100644
index 0000000..743d4b3
--- /dev/null
+++ b/xmalloc.c
@@ -0,0 +1,119 @@
+/* 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
+   Free Software Foundation; either version 1, or (at your option) any
+   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
+   Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#if defined (HAVE_CONFIG_H)
+#include <config.h>
+#endif
+
+#include <sys/types.h>
+#include <stdio.h>
+
+#if defined (HAVE_UNISTD_H)
+#  include <unistd.h>
+#endif
+
+#if defined (HAVE_STDLIB_H)
+#  include <stdlib.h>
+#else
+#  include "ansi_stdlib.h"
+#endif /* HAVE_STDLIB_H */
+
+#include "error.h"
+
+#if !defined (PTR_T)
+#  if defined (__STDC__)
+#    define PTR_T void *
+#  else
+#    define PTR_T char *
+#  endif /* !__STDC__ */
+#endif /* !PTR_T */
+
+#if !defined (SBRK_DECLARED)
+extern char *sbrk();
+#endif
+
+static PTR_T lbreak;
+static int brkfound;
+static size_t allocated;
+
+/* **************************************************************** */
+/*								    */
+/*		   Memory Allocation and Deallocation.		    */
+/*								    */
+/* **************************************************************** */
+
+/* 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. */
+char *
+xmalloc (bytes)
+     size_t bytes;
+{
+  char *temp;
+
+  temp = (char *)malloc (bytes);
+
+  if (temp == 0)
+    {
+      if (brkfound == 0)
+	{
+	  lbreak = (PTR_T)sbrk (0);
+	  brkfound++;
+	}
+      allocated = (char *)sbrk (0) - (char *)lbreak;
+      fatal_error ("xmalloc: cannot allocate %lu bytes (%lu bytes allocated)", (unsigned long)bytes, (unsigned long)allocated);
+    }
+
+  return (temp);
+}
+
+char *
+xrealloc (pointer, bytes)
+     PTR_T pointer;
+     size_t bytes;
+{
+  char *temp;
+
+  temp = pointer ? (char *)realloc (pointer, bytes) : (char *)malloc (bytes);
+
+  if (temp == 0)
+    {
+      if (brkfound == 0)
+	{
+	  lbreak = (PTR_T)sbrk (0);
+	  brkfound++;
+	}
+      allocated = (char *)sbrk (0) - (char *)lbreak;
+      fatal_error ("xrealloc: cannot reallocate %lu bytes (%lu bytes allocated)", (unsigned long)bytes, (unsigned long)allocated);
+    }
+
+  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)
+     char *string;
+{
+  if (string)
+    free (string);
+}