1 files changed, 136 insertions, 0 deletions
diff --git a/gl/read-file.c b/gl/read-file.c
new file mode 100644
index 0000000..1045b49
--- /dev/null
+++ b/gl/read-file.c
@@ -0,0 +1,136 @@
+/* read-file.c -- read file contents into a string
+   Copyright (C) 2006 Free Software Foundation, Inc.
+   Written by Simon Josefsson and Bruno Haible.
+
+   This program 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 2, or (at your option)
+   any later version.
+
+   This program 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, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#include <config.h>
+
+#include "read-file.h"
+
+/* Get realloc, free. */
+#include <stdlib.h>
+
+/* Get errno. */
+#include <errno.h>
+
+/* Read a STREAM and return a newly allocated string with the content,
+   and set *LENGTH to the length of the string.  The string is
+   zero-terminated, but the terminating zero byte is not counted in
+   *LENGTH.  On errors, *LENGTH is undefined, errno preserves the
+   values set by system functions (if any), and NULL is returned. */
+char *
+fread_file (FILE * stream, size_t * length)
+{
+  char *buf = NULL;
+  size_t alloc = 0;
+  size_t size = 0;
+  int save_errno;
+
+  for (;;)
+    {
+      size_t count;
+      size_t requested;
+
+      if (size + BUFSIZ + 1 > alloc)
+	{
+	  char *new_buf;
+
+	  alloc += alloc / 2;
+	  if (alloc < size + BUFSIZ + 1)
+	    alloc = size + BUFSIZ + 1;
+
+	  new_buf = realloc (buf, alloc);
+	  if (!new_buf)
+	    {
+	      save_errno = errno;
+	      break;
+	    }
+
+	  buf = new_buf;
+	}
+
+      requested = alloc - size - 1;
+      count = fread (buf + size, 1, requested, stream);
+      size += count;
+
+      if (count != requested)
+	{
+	  save_errno = errno;
+	  if (ferror (stream))
+	    break;
+	  buf[size] = '\0';
+	  *length = size;
+	  return buf;
+	}
+    }
+
+  free (buf);
+  errno = save_errno;
+  return NULL;
+}
+
+static char *
+internal_read_file (const char *filename, size_t * length, const char *mode)
+{
+  FILE *stream = fopen (filename, mode);
+  char *out;
+  int save_errno;
+
+  if (!stream)
+    return NULL;
+
+  out = fread_file (stream, length);
+
+  save_errno = errno;
+
+  if (fclose (stream) != 0)
+    {
+      if (out)
+	{
+	  save_errno = errno;
+	  free (out);
+	}
+      errno = save_errno;
+      return NULL;
+    }
+
+  return out;
+}
+
+/* Open and read the contents of FILENAME, and return a newly
+   allocated string with the content, and set *LENGTH to the length of
+   the string.  The string is zero-terminated, but the terminating
+   zero byte is not counted in *LENGTH.  On errors, *LENGTH is
+   undefined, errno preserves the values set by system functions (if
+   any), and NULL is returned.  */
+char *
+read_file (const char *filename, size_t * length)
+{
+  return internal_read_file (filename, length, "r");
+}
+
+/* Open (on non-POSIX systems, in binary mode) and read the contents
+   of FILENAME, and return a newly allocated string with the content,
+   and set LENGTH to the length of the string.  The string is
+   zero-terminated, but the terminating zero byte is not counted in
+   the LENGTH variable.  On errors, *LENGTH is undefined, errno
+   preserves the values set by system functions (if any), and NULL is
+   returned.  */
+char *
+read_binary_file (const char *filename, size_t * length)
+{
+  return internal_read_file (filename, length, "rb");
+}