From 8193024d960a8aa2a780fefe8b50321f4e6c5a93 Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Mon, 31 Mar 2003 10:09:58 +0000
Subject: [PATCH] Additional check for the keywords.

---
 ChangeLog     |  3 +++
 src/search.cc | 21 ++++++++++++++++++++-
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 6c21729..f7e8d3f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2002-12-10  Bruno Haible  <bruno@clisp.org>
 
+	* src/search.cc (Search::preprepare): Exit if keywords contain
+	out-of-range characters.
+
 	* src/search.cc (for): Define so as to avoid errors with old compilers.
 
 	* src/options.h (SHAREDLIB): New enum value.
diff --git a/src/search.cc b/src/search.cc
index cb98457..f24a0c7 100644
--- a/src/search.cc
+++ b/src/search.cc
@@ -114,7 +114,7 @@ Search::preprepare ()
         _min_key_len = keyword->_allchars_length;
     }
 
-  /* Exit program if an empty string is used as key, since the comparison
+  /* Exit program if an empty string is used as keyword, since the comparison
      expressions don't work correctly for looking up an empty string.  */
   if (_min_key_len == 0)
     {
@@ -123,6 +123,25 @@ Search::preprepare ()
                        "len == 0 before calling the gperf generated lookup function.\n");
       exit (1);
     }
+
+  /* Exit program if the characters in the keywords are not in the required
+     range.  */
+  if (option[SEVENBIT])
+    for (temp = _head; temp; temp = temp->rest())
+      {
+        KeywordExt *keyword = temp->first();
+
+        const char *k = keyword->_allchars;
+        for (int i = keyword->_allchars_length; i > 0; k++, i--)
+          if (!(static_cast<unsigned char>(*k) < 128))
+            {
+              fprintf (stderr, "Option --seven-bit has been specified,\n"
+                       "but keyword \"%.*s\" contains non-ASCII characters.\n"
+                       "Try removing option --seven-bit.\n",
+                       keyword->_allchars_length, keyword->_allchars);
+              exit (1);
+            }
+      }
 }
 
 /* ====================== Finding good byte positions ====================== */