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[gnu-emacs] / src / regex.c

diff --git a/src/regex.c b/src/regex.c
index 4e00fd15dc9317d976312cebc0171a2e3947868e..164eb4612ae01cb901caa6664b39b35a4fcaea4d 100644 (file)
--- a/src/regex.c
+++ b/src/regex.c
@@ -2,7 +2,7 @@
    0.12.  (Implements POSIX draft P1003.2/D11.2, except for some of the
    internationalization features.)
 
-   Copyright (C) 1993-2015 Free Software Foundation, Inc.
+   Copyright (C) 1993-2016 Free Software Foundation, Inc.
 
    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
@@ -5444,7 +5444,7 @@ re_match_2_internal (struct re_pattern_buffer *bufp, const_re_char *string1,
        case charset:
        case charset_not:
          {
-           register unsigned int c;
+           register unsigned int c, corig;
            boolean not = (re_opcode_t) *(p - 1) == charset_not;
            int len;
 
@@ -5473,7 +5473,7 @@ re_match_2_internal (struct re_pattern_buffer *bufp, const_re_char *string1,
              }
 
            PREFETCH ();
-           c = RE_STRING_CHAR_AND_LENGTH (d, len, target_multibyte);
+           corig = c = RE_STRING_CHAR_AND_LENGTH (d, len, target_multibyte);
            if (target_multibyte)
              {
                int c1;
@@ -5517,11 +5517,17 @@ re_match_2_internal (struct re_pattern_buffer *bufp, const_re_char *string1,
              {
                int class_bits = CHARSET_RANGE_TABLE_BITS (&p[-1]);
 
-               if (  (class_bits & BIT_LOWER && ISLOWER (c))
+               if (  (class_bits & BIT_LOWER
+                      && (ISLOWER (c)
+                          || (corig != c
+                              && c == upcase (corig) && ISUPPER(c))))
                    | (class_bits & BIT_MULTIBYTE)
                    | (class_bits & BIT_PUNCT && ISPUNCT (c))
                    | (class_bits & BIT_SPACE && ISSPACE (c))
-                   | (class_bits & BIT_UPPER && ISUPPER (c))
+                   | (class_bits & BIT_UPPER
+                      && (ISUPPER (c)
+                          || (corig != c
+                              && c == downcase (corig) && ISLOWER (c))))
                    | (class_bits & BIT_WORD  && ISWORD  (c))
                    | (class_bits & BIT_ALPHA && ISALPHA (c))
                    | (class_bits & BIT_ALNUM && ISALNUM (c))