New option --ignore-case.

tests/Makefile.in

@@ -143,6 +143,8 @@ check-test:
 	diff $(srcdir)/permut2.exp permut2.out
 	$(GPERF) -m5 < $(srcdir)/permut3.gperf > permut3.out
 	diff $(srcdir)/permut3.exp permut3.out
+	$(GPERF) -m5 --ignore-case < $(srcdir)/permutc2.gperf > permutc2.out
+	diff $(srcdir)/permutc2.exp permutc2.out
 	$(GPERF) -C -E -G -I -t < $(srcdir)/charsets.gperf > charsets.out
 	diff $(srcdir)/charsets.exp charsets.out
 	$(GPERF) -C -E -G -I -t < $(srcdir)/languages.gperf > languages.out

tests/permutc2.exp

@@ -0,0 +1,116 @@
+/* C code produced by gperf version 2.7.2 */
+/* Command-line: ../src/gperf -m5 --ignore-case  */
+/* Computed positions: -k'1-2' */
+
+/* Test of a hash function which has to deal with permutation and
+   case-independence.  Without case-independence, the alpha_inc is 1.
+   With case-independence, the alpha_inc is 3.  */
+
+#define TOTAL_KEYWORDS 8
+#define MIN_WORD_LENGTH 2
+#define MAX_WORD_LENGTH 2
+#define MIN_HASH_VALUE 2
+#define MAX_HASH_VALUE 9
+/* maximum key range = 8, duplicates = 0 */
+
+#ifndef GPERF_CASE_STRCMP
+#define GPERF_CASE_STRCMP 1
+static int
+gperf_case_strcmp (s1, s2)
+     register const char *s1;
+     register const char *s2;
+{
+  for (;;)
+    {
+      unsigned char c1 = *s1++;
+      unsigned char c2 = *s2++;
+      if (c1 >= 'A' && c1 <= 'Z')
+        c1 += 'a' - 'A';
+      if (c2 >= 'A' && c2 <= 'Z')
+        c2 += 'a' - 'A';
+      if (c1 != 0 && c1 == c2)
+        continue;
+      return (int)c1 - (int)c2;
+    }
+}
+#endif
+
+#ifdef __GNUC__
+__inline
+#else
+#ifdef __cplusplus
+inline
+#endif
+#endif
+static unsigned int
+hash (str, len)
+     register const char *str;
+     register unsigned int len;
+{
+  static unsigned char asso_values[] =
+    {
+     10,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10, 1,10,10, 3,10,
+     10,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10,10,10,10, 3, 1,
+      0, 7, 1, 0, 3,10,10, 1,10,10,
+      3,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10,10,10,10,10,10,
+      3, 1, 0, 0, 1, 0, 2,10,10,10,
+     10,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10,10,10,10,10,10,
+     10,10,10,10,10,10,10,10,10
+    };
+  return len + asso_values[(unsigned char)str[1]+3] + asso_values[(unsigned char)str[0]];
+}
+
+#ifdef __GNUC__
+__inline
+#endif
+const char *
+in_word_set (str, len)
+     register const char *str;
+     register unsigned int len;
+{
+  static const char * wordlist[] =
+    {
+      "", "",
+      "{w",
+      "az",
+      "ay",
+      "za",
+      "ya",
+      "x{",
+      "x[",
+      "[w"
+    };
+
+  if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH)
+    {
+      register int key = hash (str, len);
+
+      if (key <= MAX_HASH_VALUE && key >= 0)
+        {
+          register const char *s = wordlist[key];
+
+          if (*str == *s && !gperf_case_strcmp (str + 1, s + 1))
+            return s;
+        }
+    }
+  return 0;
+}

tests/permutc2.gperf

@@ -0,0 +1,14 @@
+%{
+/* Test of a hash function which has to deal with permutation and
+   case-independence.  Without case-independence, the alpha_inc is 1.
+   With case-independence, the alpha_inc is 3.  */
+%}
+%%
+az
+za
+ay
+ya
+x{
+x[
+{w
+[w

tests/test-6.exp

@@ -20,6 +20,9 @@ Input file interpretation:
                          is considered part of the type declaration. Key
                          words and additional fields may follow this, one
                          group of fields per line.
+      --ignore-case      Consider upper and lower case ASCII characters as
+                         equivalent. Note that locale dependent case mappings
+                         are ignored.
 
 Language for the output code:
   -L, --language=LANGUAGE-NAME