Move Package::Constants from lib to ext

[p5sagit/p5-mst-13.2.git] / utf8.c

diff --git a/utf8.c b/utf8.c
index b5a3809..9a242e0 100644 (file)
--- a/utf8.c
+++ b/utf8.c
@@ -51,6 +51,37 @@ Unicode characters as a variable number of bytes, in such a way that
 characters in the ASCII range are unmodified, and a zero byte never appears
 within non-zero characters.
 
+=cut
+*/
+
+/*
+=for apidoc is_ascii_string
+
+Returns true if first C<len> bytes of the given string are ASCII (i.e. none
+of them even raise the question of UTF-8-ness).
+
+See also is_utf8_string(), is_utf8_string_loclen(), and is_utf8_string_loc().
+
+=cut
+*/
+
+bool
+Perl_is_ascii_string(const U8 *s, STRLEN len)
+{
+    const U8* const send = s + (len ? len : strlen((const char *)s));
+    const U8* x = s;
+
+    PERL_ARGS_ASSERT_IS_ASCII_STRING;
+
+    for (; x < send; ++x) {
+       if (!UTF8_IS_INVARIANT(*x))
+           break;
+    }
+
+    return x == send;
+}
+
+/*
 =for apidoc uvuni_to_utf8_flags
 
 Adds the UTF-8 representation of the Unicode codepoint C<uv> to the end
@@ -253,12 +284,11 @@ character will be returned if it is valid, otherwise 0.
 
 =cut */
 STRLEN
-Perl_is_utf8_char(pTHX_ const U8 *s)
+Perl_is_utf8_char(const U8 *s)
 {
     const STRLEN len = UTF8SKIP(s);
 
     PERL_ARGS_ASSERT_IS_UTF8_CHAR;
-    PERL_UNUSED_CONTEXT;
 #ifdef IS_UTF8_CHAR
     if (IS_UTF8_CHAR_FAST(len))
         return IS_UTF8_CHAR(s, len) ? len : 0;
@@ -266,6 +296,7 @@ Perl_is_utf8_char(pTHX_ const U8 *s)
     return is_utf8_char_slow(s, len);
 }
 
+
 /*
 =for apidoc is_utf8_string
 
@@ -274,19 +305,18 @@ UTF-8 string, false otherwise.  Note that 'a valid UTF-8 string' does
 not mean 'a string that contains code points above 0x7F encoded in UTF-8'
 because a valid ASCII string is a valid UTF-8 string.
 
-See also is_utf8_string_loclen() and is_utf8_string_loc().
+See also is_ascii_string(), is_utf8_string_loclen(), and is_utf8_string_loc().
 
 =cut
 */
 
 bool
-Perl_is_utf8_string(pTHX_ const U8 *s, STRLEN len)
+Perl_is_utf8_string(const U8 *s, STRLEN len)
 {
     const U8* const send = s + (len ? len : strlen((const char *)s));
     const U8* x = s;
 
     PERL_ARGS_ASSERT_IS_UTF8_STRING;
-    PERL_UNUSED_CONTEXT;
 
     while (x < send) {
        STRLEN c;
@@ -345,7 +375,7 @@ See also is_utf8_string_loc() and is_utf8_string().
 */
 
 bool
-Perl_is_utf8_string_loclen(pTHX_ const U8 *s, STRLEN len, const U8 **ep, STRLEN *el)
+Perl_is_utf8_string_loclen(const U8 *s, STRLEN len, const U8 **ep, STRLEN *el)
 {
     const U8* const send = s + (len ? len : strlen((const char *)s));
     const U8* x = s;
@@ -353,7 +383,6 @@ Perl_is_utf8_string_loclen(pTHX_ const U8 *s, STRLEN len, const U8 **ep, STRLEN
     STRLEN outlen = 0;
 
     PERL_ARGS_ASSERT_IS_UTF8_STRING_LOCLEN;
-    PERL_UNUSED_CONTEXT;
 
     while (x < send) {
         /* Inline the easy bits of is_utf8_char() here for speed... */