1 files changed, 88 insertions, 0 deletions
diff --git a/contrib/gperf/src/iterator.cc b/contrib/gperf/src/iterator.cc
new file mode 100644
index 0000000..dd9d27e
--- /dev/null
+++ b/contrib/gperf/src/iterator.cc
@@ -0,0 +1,88 @@
+/* Provides an Iterator for keyword characters.
+   Copyright (C) 1989-1998 Free Software Foundation, Inc.
+   written by Douglas C. Schmidt (schmidt@ics.uci.edu)
+
+This file is part of GNU GPERF.
+
+GNU GPERF 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.
+
+GNU GPERF 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 GNU GPERF; see the file COPYING.  If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111, USA.  */
+
+#include "iterator.h"
+
+#include <stream.h>
+#include <ctype.h>
+#include "trace.h"
+
+/* Constructor for Iterator. */
+
+Iterator::Iterator (const char *s, int lo, int hi, int word_end, int bad_val, int key_end)
+{
+  T (Trace t ("Iterator::Iterator");)
+  end         = key_end;
+  error_value = bad_val;
+  end_word    = word_end;
+  str         = s;
+  hi_bound    = hi;
+  lo_bound    = lo;
+}
+
+/* Provide an Iterator, returning the ``next'' value from
+   the list of valid values given in the constructor. */
+
+int
+Iterator::operator() (void)
+{
+  T (Trace t ("Iterator::operator()");)
+/* Variables to record the Iterator's status when handling ranges, e.g., 3-12. */
+
+  static int size;
+  static int curr_value;
+  static int upper_bound;
+
+  if (size)
+    {
+      if (++curr_value >= upper_bound)
+        size = 0;
+      return curr_value;
+    }
+  else
+    {
+      while (*str)
+        switch (*str)
+          {
+          default: return error_value;
+          case ',': str++; break;
+          case '$': str++; return end_word;
+          case '0': case '1': case '2': case '3': case '4':
+          case '5': case '6': case '7': case '8': case '9':
+            for (curr_value = 0; isdigit ((unsigned char)(*str)); str++)
+              curr_value = curr_value * 10 + (*str - '0');
+
+            if (*str == '-')
+              {
+
+                for (size = 1, upper_bound = 0;
+                     isdigit ((unsigned char)(*++str));
+                     upper_bound = upper_bound * 10 + (*str - '0'));
+
+                if (upper_bound <= curr_value || upper_bound > hi_bound)
+                  return error_value;
+              }
+            return curr_value >= lo_bound && curr_value <= hi_bound
+              ? curr_value : error_value;
+          }
+
+      return end;
+    }
+}