1 files changed, 120 insertions, 0 deletions
diff --git a/libgfortran/runtime/string.c b/libgfortran/runtime/string.c
new file mode 100644
index 00000000000..bcd60928da6
--- /dev/null
+++ b/libgfortran/runtime/string.c
@@ -0,0 +1,120 @@
+/* Copyright (C) 2002-2003 Free Software Foundation, Inc.
+   Contributed by Paul Brook
+
+This file is part of the GNU Fortran 95 runtime library (libgfor).
+
+Libgfor 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.
+
+Libgfor 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 libgfor; see the file COPYING.  If not, write to
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#include "config.h"
+#include <string.h>
+
+#include "libgfortran.h"
+
+
+/* Compare a C-style string with a fortran style string in a case-insensitive
+   manner.  Used for decoding string options to various statements.  Returns
+   zero if not equal, nonzero if equal.  */
+
+static int
+compare0 (const char *s1, int s1_len, const char *s2)
+{
+  int i;
+
+  if (strncasecmp (s1, s2, s1_len) != 0)
+    return 0;
+
+  /* The rest of s1 needs to be blanks for equality.  */
+
+  for (i = strlen (s2); i < s1_len; i++)
+    if (s1[i] != ' ')
+      return 0;
+
+  return 1;
+}
+
+
+/* Given a fortran string, return its length exclusive of the trailing
+   spaces.  */
+int
+fstrlen (const char *string, int len)
+{
+
+  for (len--; len >= 0; len--)
+    if (string[len] != ' ')
+      break;
+
+  return len + 1;
+}
+
+
+
+void
+fstrcpy (char *dest, int destlen, const char *src, int srclen)
+{
+
+  if (srclen >= destlen)
+    {
+      /* This will truncate if too long.  */
+      memcpy (dest, src, destlen);
+    }
+  else
+    {
+      memcpy (dest, src, srclen);
+      /* Pad with spaces.  */
+      memset (&dest[srclen], ' ', destlen - srclen);
+    }
+}
+
+
+void
+cf_strcpy (char *dest, int dest_len, const char *src)
+{
+  int src_len;
+
+  src_len = strlen (src);
+
+  if (src_len >= dest_len)
+    {
+      /* This will truncate if too long.  */
+      memcpy (dest, src, dest_len);
+    }
+  else
+    {
+      memcpy (dest, src, src_len);
+      /* Pad with spaces.  */
+      memset (&dest[src_len], ' ', dest_len - src_len);
+    }
+}
+
+
+/* Given a fortran string and an array of st_option structures, search through
+   the array to find a match.  If the option is not found, we generate an error
+   if no default is provided.  */
+
+int
+find_option (const char *s1, int s1_len, st_option * opts,
+	     const char *error_message)
+{
+
+  for (; opts->name; opts++)
+    if (compare0 (s1, s1_len, opts->name))
+      return opts->value;
+
+  generate_error (ERROR_BAD_OPTION, error_message);
+
+  return -1;
+}
+