nobu	2011-01-30 12:56:16 +0900 (Sun, 30 Jan 2011)

  New Revision: 30728

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=30728

  Log:
    * include/ruby/encoding.h (rb_enc_step_back): new function to step
      back n characters.

  Modified files:
    trunk/ChangeLog
    trunk/include/ruby/encoding.h

Index: include/ruby/encoding.h
===================================================================
--- include/ruby/encoding.h	(revision 30727)
+++ include/ruby/encoding.h	(revision 30728)
@@ -162,6 +162,7 @@
 /* start, ptr, end, encoding -> next_char */
 #define rb_enc_left_char_head(s,p,e,enc) (char *)onigenc_get_left_adjust_char_head(enc,(UChar*)(s),(UChar*)(p),(UChar*)(e))
 #define rb_enc_right_char_head(s,p,e,enc) (char *)onigenc_get_right_adjust_char_head(enc,(UChar*)(s),(UChar*)(p),(UChar*)(e))
+#define rb_enc_step_back(s,p,e,n,enc) (char *)onigenc_step_back(enc,(UChar*)(s),(UChar*)(p),(UChar*)(e),(n))
 
 /* ptr, ptr, encoding -> newline_or_not */
 #define rb_enc_is_newline(p,end,enc)  ONIGENC_IS_MBC_NEWLINE(enc,(UChar*)(p),(UChar*)(end))
Index: ChangeLog
===================================================================
--- ChangeLog	(revision 30727)
+++ ChangeLog	(revision 30728)
@@ -1,3 +1,8 @@
+Sun Jan 30 12:56:13 2011  Nobuyoshi Nakada  <nobu@r...>
+
+	* include/ruby/encoding.h (rb_enc_step_back): new function to step
+	  back n characters.
+
 Sun Jan 30 12:53:38 2011  Nobuyoshi Nakada  <nobu@r...>
 
 	* enc/emacs_mule.c (emacsmule_islead): fix inverse condition.

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