From 44cd8e457b808173147c499408ffc5e908f236dc Mon Sep 17 00:00:00 2001
From: matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 19 May 2008 08:25:03 +0000
Subject: * regparse.c (PINC): use optimized enclen() instead of  
 ONIGENC_MBC_ENC_LEN().

* regparse.c (PFETCH): ditto.

* regparse.c (PFETCH): small optimization.

* regexec.c (slow_search): single byte encoding optimization.

* regenc.h (enclen): avoid calling function when encoding's
  min_len == max_len.

* re.c (rb_reg_regsub): rb_enc_ascget() optimization for single
  byte encoding.

* re.c (rb_reg_search): avoid allocating new re_registers if we
  already have MatchData.

* re.c (match_init_copy): avoid unnecessary onig_region_free()
  before onig_region_copy.

* encoding.c (rb_enc_get_index): remove implicit enc_capable check
  each time.

* encoding.c (rb_enc_set_index): ditto.

* encoding.c (enc_compatible_p): small refactoring.

* include/ruby/encoding.h (rb_enc_dummy_p): inline
  rb_enc_dummy_p() and export related code.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@16477 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 regexec.c | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

(limited to 'regexec.c')

diff --git a/regexec.c b/regexec.c
index b9947d8f93..a2d6993d08 100644
--- a/regexec.c
+++ b/regexec.c
@@ -2758,16 +2758,25 @@ slow_search(OnigEncoding enc, UChar* target, UChar* target_end,
 
   s = (UChar* )text;
 
+  if (enc->max_enc_len == enc->min_enc_len) {
+    int n = enc->max_enc_len;
+
+    while (s < end) {
+      if (*s == *target) {
+	p = s + 1;
+	t = target + 1;
+	if (memcmp(t, p, target_end - t) == 0)
+	  return s;
+      }
+      s += n;
+    }
+    return (UChar*)NULL;
+  }
   while (s < end) {
     if (*s == *target) {
       p = s + 1;
       t = target + 1;
-      while (t < target_end) {
-	if (*t != *p++)
-	  break;
-	t++;
-      }
-      if (t == target_end)
+      if (memcmp(t, p, target_end - t) == 0)
 	return s;
     }
     s += enclen(enc, s, end);
-- 
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