From f1b7e60cb90a7e1a392d4ffccd07dd06eeff5345 Mon Sep 17 00:00:00 2001
From: akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sat, 8 Dec 2007 02:50:43 +0000
Subject: * encoding.c (rb_enc_mbclen): make it never fail.   (rb_enc_nth):
 don't check the return value of rb_enc_mbclen.   (rb_enc_strlen): ditto.  
 (rb_enc_precise_mbclen): return needmore(1) if e <= p.   (rb_enc_get_ascii):
 new function for extracting ASCII character.

* include/ruby/encoding.h (rb_enc_get_ascii): declared.

* include/ruby/regex.h (ismbchar): removed.

* re.c (rb_reg_expr_str): use rb_enc_get_ascii.
  (unescape_escaped_nonascii): use rb_enc_precise_mbclen to determine
  the termination of escaped non-ASCII character.
  (unescape_nonascii): use rb_enc_precise_mbclen.
  (rb_reg_quote): use rb_enc_get_ascii.
  (rb_reg_regsub): use rb_enc_get_ascii.

* string.c (rb_str_reverse) don't check the return value of
  rb_enc_mbclen.
  (rb_str_split_m): don't call rb_enc_mbclen with e <= p.

* parse.y (is_identchar): use ISASCII.
  (parser_ismbchar): removed.
  (parser_precise_mbclen): new macro.
  (parser_isascii): new macro.
  (parser_tokadd_mbchar): use parser_precise_mbclen to check invalid
  character precisely.
  (parser_tokadd_string): use parser_isascii.
  (parser_yylex): ditto.
  (is_special_global_name): don't call is_identchar with e <= p.
  (rb_enc_symname_p): ditto.

  [ruby-dev:32455]

* ext/tk/sample/tkextlib/vu/canvSticker2.rb: remove coding cookie
  because the encoding is not UTF-8.  [ruby-dev:32475]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14131 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 encoding.c | 32 +++++++++++++++++++++++++-------
 1 file changed, 25 insertions(+), 7 deletions(-)

(limited to 'encoding.c')

diff --git a/encoding.c b/encoding.c
index 53ceac851d..540aa88701 100644
--- a/encoding.c
+++ b/encoding.c
@@ -459,7 +459,6 @@ rb_enc_nth(const char *p, const char *e, int nth, rb_encoding *enc)
 	for (c=0; p<e && nth--; c++) {
 	    int n = rb_enc_mbclen(p, e, enc);
 
-	    if (n == 0) return 0;
 	    p += n;
 	}
     }
@@ -478,7 +477,6 @@ rb_enc_strlen(const char *p, const char *e, rb_encoding *enc)
     for (c=0; p<e; c++) {
 	int n = rb_enc_mbclen(p, e, enc);
 
-	if (n == 0) return -1;
 	p += n;
     }
     return c;
@@ -487,19 +485,39 @@ rb_enc_strlen(const char *p, const char *e, rb_encoding *enc)
 int
 rb_enc_mbclen(const char *p, const char *e, rb_encoding *enc)
 {
-    int n = ONIGENC_MBC_ENC_LEN(enc, (UChar*)p, (UChar*)e);
-    if (n == 0) {
-	rb_raise(rb_eArgError, "invalid mbstring sequence");
-    }
-    return n;
+    int n = ONIGENC_PRECISE_MBC_ENC_LEN(enc, (UChar*)p, (UChar*)e);
+    if (MBCLEN_CHARFOUND(n))
+        return n;
+    else
+        return 1;
 }
 
 int
 rb_enc_precise_mbclen(const char *p, const char *e, rb_encoding *enc)
 {
+    if (e <= p)
+        return ONIGENC_CONSTRUCT_MBCLEN_NEEDMORE(1);
     return ONIGENC_PRECISE_MBC_ENC_LEN(enc, (UChar*)p, (UChar*)e);
 }
 
+int rb_enc_get_ascii(const char *p, const char *e, rb_encoding *enc)
+{
+    int c, l;
+    if (e <= p)
+        return -1;
+    if (rb_enc_asciicompat(enc)) {
+        c = (unsigned char)*p;
+        return ISASCII(c) ? c : -1;
+    }
+    l = rb_enc_precise_mbclen(p, e, enc);
+    if (!MBCLEN_CHARFOUND(l))
+        return -1;
+    c = rb_enc_codepoint(p, e, enc);
+    if (rb_enc_isascii(c, enc))
+        return c;
+    return -1;
+}
+
 int
 rb_enc_codelen(int c, rb_encoding *enc)
 {
-- 
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