return Perl_uvuni_to_utf8_flags(aTHX_ d, uv, 0);
}
-
/*
-=for apidoc A|STRLEN|is_utf8_char|const U8 *s
Tests if some arbitrary number of bytes begins in a valid UTF-8
character. Note that an INVARIANT (i.e. ASCII) character is a valid
UTF-8 character. The actual number of bytes in the UTF-8 character
will be returned if it is valid, otherwise 0.
+This is the "slow" version as opposed to the "fast" version which is
+the "unrolled" IS_UTF8_CHAR(). E.g. for t/uni/class.t the speed
+difference is a factor of 2 to 3. For lengths (UTF8SKIP(s)) of four
+or less you should use the IS_UTF8_CHAR(), for lengths of five or more
+you should use the _slow(). In practice this means that the _slow()
+will be used very rarely, since the maximum Unicode code point (as of
+Unicode 4.1) is U+10FFFF, which encodes in UTF-8 to four bytes. Only
+the "Perl extended UTF-8" (the infamous 'v-strings') will encode into
+five bytes or more.
+
=cut */
-STRLEN
-Perl_is_utf8_char(pTHX_ const U8 *s)
+STATIC STRLEN
+S_is_utf8_char_slow(pTHX_ const U8 *s, const STRLEN len)
{
- STRLEN len;
-#ifdef IS_UTF8_CHAR
- len = UTF8SKIP(s);
- if (len <= 4)
- return IS_UTF8_CHAR(s, len) ? len : 0;
-#endif /* #ifdef IS_UTF8_CHAR */
- {
- U8 u = *s;
- STRLEN slen;
- UV uv, ouv;
+ U8 u = *s;
+ STRLEN slen;
+ UV uv, ouv;
- if (UTF8_IS_INVARIANT(u))
- return 1;
+ if (UTF8_IS_INVARIANT(u))
+ return 1;
- if (!UTF8_IS_START(u))
- return 0;
+ if (!UTF8_IS_START(u))
+ return 0;
- len = UTF8SKIP(s);
+ if (len < 2 || !UTF8_IS_CONTINUATION(s[1]))
+ return 0;
- if (len < 2 || !UTF8_IS_CONTINUATION(s[1]))
- return 0;
+ slen = len - 1;
+ s++;
+ u &= UTF_START_MASK(len);
+ uv = u;
+ ouv = uv;
+ while (slen--) {
+ if (!UTF8_IS_CONTINUATION(*s))
+ return 0;
+ uv = UTF8_ACCUMULATE(uv, *s);
+ if (uv < ouv)
+ return 0;
+ ouv = uv;
+ s++;
+ }
- slen = len - 1;
- s++;
- u &= UTF_START_MASK(len);
- uv = u;
- ouv = uv;
- while (slen--) {
- if (!UTF8_IS_CONTINUATION(*s))
- return 0;
- uv = UTF8_ACCUMULATE(uv, *s);
- if (uv < ouv)
- return 0;
- ouv = uv;
- s++;
- }
+ if ((STRLEN)UNISKIP(uv) < len)
+ return 0;
- if ((STRLEN)UNISKIP(uv) < len)
- return 0;
+ return len;
+}
- return len;
- }
+/*
+=for apidoc A|STRLEN|is_utf8_char|const U8 *s
+
+Tests if some arbitrary number of bytes begins in a valid UTF-8
+character. Note that an INVARIANT (i.e. ASCII) character is a valid
+UTF-8 character. The actual number of bytes in the UTF-8 character
+will be returned if it is valid, otherwise 0.
+
+=cut */
+STRLEN
+Perl_is_utf8_char(pTHX_ const U8 *s)
+{
+ STRLEN len = UTF8SKIP(s);
+#ifdef IS_UTF8_CHAR
+ if (IS_UTF8_CHAR_FAST(len))
+ return IS_UTF8_CHAR(s, len) ? len : 0;
+#endif /* #ifdef IS_UTF8_CHAR */
+ return is_utf8_char_slow(s, len);
}
/*
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().
+
=cut
*/
if (UTF8_IS_INVARIANT(*x))
c = 1;
else if (!UTF8_IS_START(*x))
- return FALSE;
+ goto out;
else {
/* ... and call is_utf8_char() only if really needed. */
- c = is_utf8_char(x);
+#ifdef IS_UTF8_CHAR
+ c = UTF8SKIP(x);
+ if (IS_UTF8_CHAR_FAST(c)) {
+ if (!IS_UTF8_CHAR(x, c))
+ goto out;
+ } else if (!is_utf8_char_slow(x, c))
+ goto out;
+#else
+ c = is_utf8_char(x);
+#endif /* #ifdef IS_UTF8_CHAR */
if (!c)
- return FALSE;
+ goto out;
}
x += c;
}
+
+ out:
if (x != send)
return FALSE;
}
/*
-=for apidoc A|bool|is_utf8_string_loc|const U8 *s|STRLEN len|const U8 **p
+=for apidoc A|bool|is_utf8_string_loclen|const U8 *s|STRLEN len|const U8 **ep|const STRLEN *el
+
+Like is_ut8_string() but stores the location of the failure (in the
+case of "utf8ness failure") or the location s+len (in the case of
+"utf8ness success") in the C<ep>, and the number of UTF-8
+encoded characters in the C<el>.
-Like is_ut8_string but store the location of the failure in
-the last argument.
+See also is_utf8_string_loc() and is_utf8_string().
=cut
*/
bool
-Perl_is_utf8_string_loc(pTHX_ const U8 *s, STRLEN len, const U8 **p)
+Perl_is_utf8_string_loclen(pTHX_ const U8 *s, STRLEN len, const U8 **ep, STRLEN *el)
{
const U8* x = s;
const U8* send;
if (!len && s)
len = strlen((const char *)s);
send = s + len;
+ if (el)
+ *el = 0;
while (x < send) {
/* Inline the easy bits of is_utf8_char() here for speed... */
if (UTF8_IS_INVARIANT(*x))
- c = 1;
- else if (!UTF8_IS_START(*x)) {
- if (p)
- *p = x;
- return FALSE;
- }
+ c = 1;
+ else if (!UTF8_IS_START(*x))
+ goto out;
else {
- /* ... and call is_utf8_char() only if really needed. */
- c = is_utf8_char(x);
- if (!c) {
- if (p)
- *p = x;
- return FALSE;
- }
+ /* ... and call is_utf8_char() only if really needed. */
+#ifdef IS_UTF8_CHAR
+ c = UTF8SKIP(x);
+ if (IS_UTF8_CHAR_FAST(c)) {
+ if (!IS_UTF8_CHAR(x, c))
+ c = 0;
+ } else
+ c = is_utf8_char_slow(x, c);
+#else
+ c = is_utf8_char(x);
+#endif /* #ifdef IS_UTF8_CHAR */
+ if (!c)
+ goto out;
}
- x += c;
+ x += c;
+ if (el)
+ (*el)++;
}
- if (x != send) {
- if (p)
- *p = x;
+
+ out:
+ if (ep)
+ *ep = x;
+ if (x != send)
return FALSE;
- }
return TRUE;
}
/*
+=for apidoc A|bool|is_utf8_string_loc|const U8 *s|STRLEN len|const U8 **ep|const STRLEN *el
+
+Like is_ut8_string() but stores the location of the failure (in the
+case of "utf8ness failure") or the location s+len (in the case of
+"utf8ness success") in the C<ep>.
+
+See also is_utf8_string_loclen() and is_utf8_string().
+
+=cut
+*/
+
+bool
+Perl_is_utf8_string_loc(pTHX_ const U8 *s, STRLEN len, const U8 **ep)
+{
+ return is_utf8_string_loclen(s, len, ep, 0);
+}
+
+/*
=for apidoc A|UV|utf8n_to_uvuni|const U8 *s|STRLEN curlen|STRLEN *retlen|U32 flags
Bottom level UTF-8 decode routine.
projects / p5sagit/p5-mst-13.2.git / blobdiff