/* utf8.c
*
- * Copyright (c) 1998-2000, Larry Wall
+ * Copyright (c) 1998-2001, Larry Wall
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
#define PERL_IN_UTF8_C
#include "perl.h"
-/* Unicode support */
+/*
+=head1 Unicode Support
+
+=for apidoc A|U8 *|uvuni_to_utf8_flags|U8 *d|UV uv|UV flags
+
+Adds the UTF8 representation of the Unicode codepoint C<uv> to the end
+of the string C<d>; C<d> should be have at least C<UTF8_MAXLEN+1> free
+bytes available. The return value is the pointer to the byte after the
+end of the new character. In other words,
+
+ d = uvuni_to_utf8_flags(d, uv, flags);
+
+or, in most cases,
+
+ d = uvuni_to_utf8(d, uv);
+
+(which is equivalent to)
+
+ d = uvuni_to_utf8_flags(d, uv, 0);
+
+is the recommended Unicode-aware way of saying
+
+ *(d++) = uv;
+
+=cut
+*/
U8 *
-Perl_uv_to_utf8(pTHX_ U8 *d, UV uv) /* the d must be UTF8_MAXLEN+1 deep */
-{
- if (uv < 0x80) {
- *d++ = uv;
- *d = 0;
+Perl_uvuni_to_utf8_flags(pTHX_ U8 *d, UV uv, UV flags)
+{
+ if (ckWARN_d(WARN_UTF8)) {
+ if (UNICODE_IS_SURROGATE(uv) &&
+ !(flags & UNICODE_ALLOW_SURROGATE))
+ Perl_warner(aTHX_ WARN_UTF8, "UTF-16 surrogate 0x%04"UVxf, uv);
+ else if (
+ ((uv >= 0xFDD0 && uv <= 0xFDEF &&
+ !(flags & UNICODE_ALLOW_FDD0))
+ ||
+ ((uv & 0xFFFF) == 0xFFFE &&
+ !(flags & UNICODE_ALLOW_FFFE))
+ ||
+ ((uv & 0xFFFF) == 0xFFFF &&
+ !(flags & UNICODE_ALLOW_FFFF))) &&
+ /* UNICODE_ALLOW_SUPER includes
+ * FFFEs and FFFFs beyond 0x10FFFF. */
+ ((uv <= PERL_UNICODE_MAX) ||
+ !(flags & UNICODE_ALLOW_SUPER))
+ )
+ Perl_warner(aTHX_ WARN_UTF8,
+ "Unicode character 0x%04"UVxf" is illegal", uv);
+ }
+ if (UNI_IS_INVARIANT(uv)) {
+ *d++ = UTF_TO_NATIVE(uv);
return d;
}
+#if defined(EBCDIC)
+ else {
+ STRLEN len = UNISKIP(uv);
+ U8 *p = d+len-1;
+ while (p > d) {
+ *p-- = UTF_TO_NATIVE((uv & UTF_CONTINUATION_MASK) | UTF_CONTINUATION_MARK);
+ uv >>= UTF_ACCUMULATION_SHIFT;
+ }
+ *p = UTF_TO_NATIVE((uv & UTF_START_MASK(len)) | UTF_START_MARK(len));
+ return d+len;
+ }
+#else /* Non loop style */
if (uv < 0x800) {
*d++ = (( uv >> 6) | 0xc0);
*d++ = (( uv & 0x3f) | 0x80);
- *d = 0;
return d;
}
if (uv < 0x10000) {
*d++ = (( uv >> 12) | 0xe0);
*d++ = (((uv >> 6) & 0x3f) | 0x80);
*d++ = (( uv & 0x3f) | 0x80);
- *d = 0;
return d;
}
if (uv < 0x200000) {
*d++ = (((uv >> 12) & 0x3f) | 0x80);
*d++ = (((uv >> 6) & 0x3f) | 0x80);
*d++ = (( uv & 0x3f) | 0x80);
- *d = 0;
return d;
}
if (uv < 0x4000000) {
*d++ = (((uv >> 12) & 0x3f) | 0x80);
*d++ = (((uv >> 6) & 0x3f) | 0x80);
*d++ = (( uv & 0x3f) | 0x80);
- *d = 0;
return d;
}
if (uv < 0x80000000) {
*d++ = (((uv >> 12) & 0x3f) | 0x80);
*d++ = (((uv >> 6) & 0x3f) | 0x80);
*d++ = (( uv & 0x3f) | 0x80);
- *d = 0;
return d;
}
#ifdef HAS_QUAD
*d++ = (((uv >> 12) & 0x3f) | 0x80);
*d++ = (((uv >> 6) & 0x3f) | 0x80);
*d++ = (( uv & 0x3f) | 0x80);
- *d = 0;
return d;
}
#ifdef HAS_QUAD
*d++ = (((uv >> 12) & 0x3f) | 0x80);
*d++ = (((uv >> 6) & 0x3f) | 0x80);
*d++ = (( uv & 0x3f) | 0x80);
- *d = 0;
return d;
}
#endif
+#endif /* Loop style */
+}
+
+U8 *
+Perl_uvuni_to_utf8(pTHX_ U8 *d, UV uv)
+{
+ return Perl_uvuni_to_utf8_flags(aTHX_ d, uv, 0);
}
-/* Tests if some arbitrary number of bytes begins in a valid UTF-8 character.
- * The actual number of bytes in the UTF-8 character will be returned if it
- * is valid, otherwise 0. */
+
+/*
+=for apidoc A|STRLEN|is_utf8_char|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_ U8 *s)
{
STRLEN slen, len;
UV uv, ouv;
- if (u <= 0x7f)
+ if (UTF8_IS_INVARIANT(u))
return 1;
- if (u >= 0x80 && u <= 0xbf)
+ if (!UTF8_IS_START(u))
return 0;
len = UTF8SKIP(s);
- if (len < 2 || (u >= 0xc0 && u <= 0xfd && s[1] < 0x80))
+ if (len < 2 || !UTF8_IS_CONTINUATION(s[1]))
return 0;
slen = len - 1;
s++;
- uv = u;
+ u &= UTF_START_MASK(len);
+ uv = u;
ouv = uv;
while (slen--) {
- if ((*s & 0xc0) != 0x80)
+ if (!UTF8_IS_CONTINUATION(*s))
return 0;
uv = UTF8_ACCUMULATE(uv, *s);
- if (uv < ouv)
+ if (uv < ouv)
return 0;
ouv = uv;
s++;
}
/*
-=for apidoc Am|is_utf8_string|U8 *s|STRLEN len
+=for apidoc A|bool|is_utf8_string|U8 *s|STRLEN len
-Returns true if first C<len> bytes of the given string form valid a UTF8
-string, false otherwise.
+Returns true if first C<len> bytes of the given string form a valid UTF8
+string, false otherwise. Note that 'a valid UTF8 string' does not mean
+'a string that contains UTF8' because a valid ASCII string is a valid
+UTF8 string.
=cut
*/
Perl_is_utf8_string(pTHX_ U8 *s, STRLEN len)
{
U8* x = s;
- U8* send = s + len;
+ U8* send;
STRLEN c;
+ if (!len)
+ len = strlen((char *)s);
+ send = s + len;
+
while (x < send) {
c = is_utf8_char(x);
if (!c)
return FALSE;
x += c;
- if (x > send)
- return FALSE;
}
+ if (x != send)
+ return FALSE;
return TRUE;
}
/*
-=for apidoc Am|U8* s|utf8_to_uv|STRLEN curlen|STRLEN *retlen|U32 flags
+=for apidoc A|UV|utf8n_to_uvuni|U8 *s|STRLEN curlen|STRLEN *retlen|U32 flags
-Returns the character value of the first character in the string C<s>
+Bottom level UTF-8 decode routine.
+Returns the unicode code point value of the first character in the string C<s>
which is assumed to be in UTF8 encoding and no longer than C<curlen>;
-C<retlen> will be set to the length, in bytes, of that character,
-and the pointer C<s> will be advanced to the end of the character.
+C<retlen> will be set to the length, in bytes, of that character.
If C<s> does not point to a well-formed UTF8 character, the behaviour
is dependent on the value of C<flags>: if it contains UTF8_CHECK_ONLY,
it is assumed that the caller will raise a warning, and this function
-will set C<retlen> to C<-1> and return zero. If the C<flags> does not
-contain UTF8_CHECK_ONLY, the UNICODE_REPLACEMENT (0xFFFD) will be
-returned, and C<retlen> will be set to the expected length of the
-UTF-8 character in bytes. The C<flags> can also contain various flags
-to allow deviations from the strict UTF-8 encoding (see F<utf8.h>).
+will silently just set C<retlen> to C<-1> and return zero. If the
+C<flags> does not contain UTF8_CHECK_ONLY, warnings about
+malformations will be given, C<retlen> will be set to the expected
+length of the UTF-8 character in bytes, and zero will be returned.
-=cut */
+The C<flags> can also contain various flags to allow deviations from
+the strict UTF-8 encoding (see F<utf8.h>).
+
+Most code should use utf8_to_uvchr() rather than call this directly.
+
+=cut
+*/
UV
-Perl_utf8_to_uv(pTHX_ U8* s, STRLEN curlen, STRLEN* retlen, U32 flags)
+Perl_utf8n_to_uvuni(pTHX_ U8 *s, STRLEN curlen, STRLEN *retlen, U32 flags)
{
- UV uv = *s, ouv;
+ U8 *s0 = s;
+ UV uv = *s, ouv = 0;
STRLEN len = 1;
-#ifdef EBCDIC
- bool dowarn = 0;
-#else
bool dowarn = ckWARN_d(WARN_UTF8);
-#endif
+ UV startbyte = *s;
STRLEN expectlen = 0;
-
- if (curlen == 0) {
- if (dowarn)
- Perl_warner(aTHX_ WARN_UTF8,
- "Malformed UTF-8 character (an empty string)");
+ U32 warning = 0;
+
+/* This list is a superset of the UTF8_ALLOW_XXX. */
+
+#define UTF8_WARN_EMPTY 1
+#define UTF8_WARN_CONTINUATION 2
+#define UTF8_WARN_NON_CONTINUATION 3
+#define UTF8_WARN_FE_FF 4
+#define UTF8_WARN_SHORT 5
+#define UTF8_WARN_OVERFLOW 6
+#define UTF8_WARN_SURROGATE 7
+#define UTF8_WARN_BOM 8
+#define UTF8_WARN_LONG 9
+#define UTF8_WARN_FFFF 10
+
+ if (curlen == 0 &&
+ !(flags & UTF8_ALLOW_EMPTY)) {
+ warning = UTF8_WARN_EMPTY;
goto malformed;
}
- if (UTF8_IS_ASCII(uv)) {
+ if (UTF8_IS_INVARIANT(uv)) {
if (retlen)
*retlen = 1;
- return *s;
+ return (UV) (NATIVE_TO_UTF(*s));
}
if (UTF8_IS_CONTINUATION(uv) &&
!(flags & UTF8_ALLOW_CONTINUATION)) {
- if (dowarn)
- Perl_warner(aTHX_ WARN_UTF8,
- "Malformed UTF-8 character (unexpected continuation byte 0x%02"UVxf")",
- uv);
+ warning = UTF8_WARN_CONTINUATION;
goto malformed;
}
if (UTF8_IS_START(uv) && curlen > 1 && !UTF8_IS_CONTINUATION(s[1]) &&
!(flags & UTF8_ALLOW_NON_CONTINUATION)) {
- if (dowarn)
- Perl_warner(aTHX_ WARN_UTF8,
- "Malformed UTF-8 character (unexpected non-continuation byte 0x%02"UVxf" after start byte 0x%02"UVxf")",
- (UV)s[1], uv);
+ warning = UTF8_WARN_NON_CONTINUATION;
goto malformed;
}
-
+
+#ifdef EBCDIC
+ uv = NATIVE_TO_UTF(uv);
+#else
if ((uv == 0xfe || uv == 0xff) &&
!(flags & UTF8_ALLOW_FE_FF)) {
- if (dowarn)
- Perl_warner(aTHX_ WARN_UTF8,
- "Malformed UTF-8 character (byte 0x%02"UVxf")",
- uv);
+ warning = UTF8_WARN_FE_FF;
goto malformed;
}
-
+#endif
+
if (!(uv & 0x20)) { len = 2; uv &= 0x1f; }
else if (!(uv & 0x10)) { len = 3; uv &= 0x0f; }
else if (!(uv & 0x08)) { len = 4; uv &= 0x07; }
else if (!(uv & 0x04)) { len = 5; uv &= 0x03; }
+#ifdef EBCDIC
+ else if (!(uv & 0x02)) { len = 6; uv &= 0x01; }
+ else { len = 7; uv &= 0x01; }
+#else
else if (!(uv & 0x02)) { len = 6; uv &= 0x01; }
else if (!(uv & 0x01)) { len = 7; uv = 0; }
- else { len = 13; uv = 0; } /* whoa! */
-
+ else { len = 13; uv = 0; } /* whoa! */
+#endif
+
if (retlen)
*retlen = len;
-
+
expectlen = len;
if ((curlen < expectlen) &&
!(flags & UTF8_ALLOW_SHORT)) {
- if (dowarn)
- Perl_warner(aTHX_ WARN_UTF8,
- "Malformed UTF-8 character (%d byte%s, need %d)",
- curlen, curlen == 1 ? "" : "s", expectlen);
+ warning = UTF8_WARN_SHORT;
goto malformed;
}
while (len--) {
if (!UTF8_IS_CONTINUATION(*s) &&
!(flags & UTF8_ALLOW_NON_CONTINUATION)) {
- if (dowarn)
- Perl_warner(aTHX_ WARN_UTF8,
- "Malformed UTF-8 character (unexpected non-continuation byte 0x%02x)",
- *s);
+ s--;
+ warning = UTF8_WARN_NON_CONTINUATION;
goto malformed;
}
else
uv = UTF8_ACCUMULATE(uv, *s);
- if (uv < ouv) {
- /* This cannot be allowed. */
- if (dowarn)
- Perl_warner(aTHX_ WARN_UTF8,
- "Malformed UTF-8 character (overflow at 0x%"UVxf", byte 0x%02x)",
- ouv, *s);
- goto malformed;
+ if (!(uv > ouv)) {
+ /* These cannot be allowed. */
+ if (uv == ouv) {
+ if (!(flags & UTF8_ALLOW_LONG)) {
+ warning = UTF8_WARN_LONG;
+ goto malformed;
+ }
+ }
+ else { /* uv < ouv */
+ /* This cannot be allowed. */
+ warning = UTF8_WARN_OVERFLOW;
+ goto malformed;
+ }
}
s++;
ouv = uv;
if (UNICODE_IS_SURROGATE(uv) &&
!(flags & UTF8_ALLOW_SURROGATE)) {
- if (dowarn)
- Perl_warner(aTHX_ WARN_UTF8,
- "Malformed UTF-8 character (UTF-16 surrogate 0x%04"UVxf")",
- uv);
+ warning = UTF8_WARN_SURROGATE;
goto malformed;
} else if (UNICODE_IS_BYTE_ORDER_MARK(uv) &&
!(flags & UTF8_ALLOW_BOM)) {
- if (dowarn)
- Perl_warner(aTHX_ WARN_UTF8,
- "Malformed UTF-8 character (byte order mark 0x%04"UVxf")",
- uv);
+ warning = UTF8_WARN_BOM;
goto malformed;
} else if ((expectlen > UNISKIP(uv)) &&
!(flags & UTF8_ALLOW_LONG)) {
- if (dowarn)
- Perl_warner(aTHX_ WARN_UTF8,
- "Malformed UTF-8 character (%d byte%s, need %d)",
- expectlen, expectlen == 1 ? "": "s", UNISKIP(uv));
+ warning = UTF8_WARN_LONG;
goto malformed;
} else if (UNICODE_IS_ILLEGAL(uv) &&
!(flags & UTF8_ALLOW_FFFF)) {
- if (dowarn)
- Perl_warner(aTHX_ WARN_UTF8,
- "Malformed UTF-8 character (character 0x%04"UVxf")",
- uv);
+ warning = UTF8_WARN_FFFF;
goto malformed;
}
return 0;
}
+ if (dowarn) {
+ SV* sv = sv_2mortal(newSVpv("Malformed UTF-8 character ", 0));
+
+ switch (warning) {
+ case 0: /* Intentionally empty. */ break;
+ case UTF8_WARN_EMPTY:
+ Perl_sv_catpvf(aTHX_ sv, "(empty string)");
+ break;
+ case UTF8_WARN_CONTINUATION:
+ Perl_sv_catpvf(aTHX_ sv, "(unexpected continuation byte 0x%02"UVxf", with no preceding start byte)", uv);
+ break;
+ case UTF8_WARN_NON_CONTINUATION:
+ if (s == s0)
+ Perl_sv_catpvf(aTHX_ sv, "(unexpected non-continuation byte 0x%02"UVxf", immediately after start byte 0x%02"UVxf")",
+ (UV)s[1], startbyte);
+ else
+ Perl_sv_catpvf(aTHX_ sv, "(unexpected non-continuation byte 0x%02"UVxf", %d byte%s after start byte 0x%02"UVxf", expected %d bytes)",
+ (UV)s[1], s - s0, s - s0 > 1 ? "s" : "", startbyte, expectlen);
+
+ break;
+ case UTF8_WARN_FE_FF:
+ Perl_sv_catpvf(aTHX_ sv, "(byte 0x%02"UVxf")", uv);
+ break;
+ case UTF8_WARN_SHORT:
+ Perl_sv_catpvf(aTHX_ sv, "(%d byte%s, need %d, after start byte 0x%02"UVxf")",
+ curlen, curlen == 1 ? "" : "s", expectlen, startbyte);
+ expectlen = curlen; /* distance for caller to skip */
+ break;
+ case UTF8_WARN_OVERFLOW:
+ Perl_sv_catpvf(aTHX_ sv, "(overflow at 0x%"UVxf", byte 0x%02x, after start byte 0x%02"UVxf")",
+ ouv, *s, startbyte);
+ break;
+ case UTF8_WARN_SURROGATE:
+ Perl_sv_catpvf(aTHX_ sv, "(UTF-16 surrogate 0x%04"UVxf")", uv);
+ break;
+ case UTF8_WARN_BOM:
+ Perl_sv_catpvf(aTHX_ sv, "(byte order mark 0x%04"UVxf")", uv);
+ break;
+ case UTF8_WARN_LONG:
+ Perl_sv_catpvf(aTHX_ sv, "(%d byte%s, need %d, after start byte 0x%02"UVxf")",
+ expectlen, expectlen == 1 ? "": "s", UNISKIP(uv), startbyte);
+ break;
+ case UTF8_WARN_FFFF:
+ Perl_sv_catpvf(aTHX_ sv, "(character 0x%04"UVxf")", uv);
+ break;
+ default:
+ Perl_sv_catpvf(aTHX_ sv, "(unknown reason)");
+ break;
+ }
+
+ if (warning) {
+ char *s = SvPVX(sv);
+
+ if (PL_op)
+ Perl_warner(aTHX_ WARN_UTF8,
+ "%s in %s", s, OP_DESC(PL_op));
+ else
+ Perl_warner(aTHX_ WARN_UTF8, "%s", s);
+ }
+ }
+
if (retlen)
- *retlen = expectlen;
+ *retlen = expectlen ? expectlen : len;
- return UNICODE_REPLACEMENT;
+ return 0;
}
/*
-=for apidoc Am|U8* s|utf8_to_uv_simple|STRLEN *retlen
+=for apidoc A|UV|utf8_to_uvchr|U8 *s|STRLEN *retlen
-Returns the character value of the first character in the string C<s>
+Returns the native character value of the first character in the string C<s>
which is assumed to be in UTF8 encoding; C<retlen> will be set to the
-length, in bytes, of that character, and the pointer C<s> will be
-advanced to the end of the character.
+length, in bytes, of that character.
If C<s> does not point to a well-formed UTF8 character, zero is
returned and retlen is set, if possible, to -1.
*/
UV
-Perl_utf8_to_uv_simple(pTHX_ U8* s, STRLEN* retlen)
+Perl_utf8_to_uvchr(pTHX_ U8 *s, STRLEN *retlen)
{
- return Perl_utf8_to_uv(aTHX_ s, UTF8_MAXLEN, retlen, 0);
+ return Perl_utf8n_to_uvchr(aTHX_ s, UTF8_MAXLEN, retlen, 0);
}
/*
-=for apidoc Am|STRLEN|utf8_length|U8* s|U8 *e
+=for apidoc A|UV|utf8_to_uvuni|U8 *s|STRLEN *retlen
+
+Returns the Unicode code point of the first character in the string C<s>
+which is assumed to be in UTF8 encoding; C<retlen> will be set to the
+length, in bytes, of that character.
+
+This function should only be used when returned UV is considered
+an index into the Unicode semantic tables (e.g. swashes).
+
+If C<s> does not point to a well-formed UTF8 character, zero is
+returned and retlen is set, if possible, to -1.
+
+=cut
+*/
+
+UV
+Perl_utf8_to_uvuni(pTHX_ U8 *s, STRLEN *retlen)
+{
+ /* Call the low level routine asking for checks */
+ return Perl_utf8n_to_uvuni(aTHX_ s, UTF8_MAXLEN, retlen, 0);
+}
+
+/*
+=for apidoc A|STRLEN|utf8_length|U8 *s|U8 *e
Return the length of the UTF-8 char encoded string C<s> in characters.
Stops at C<e> (inclusive). If C<e E<lt> s> or if the scan would end
*/
STRLEN
-Perl_utf8_length(pTHX_ U8* s, U8* e)
+Perl_utf8_length(pTHX_ U8 *s, U8 *e)
{
STRLEN len = 0;
}
/*
-=for apidoc Am|IV|utf8_distance|U8 *a|U8 *b
+=for apidoc A|IV|utf8_distance|U8 *a|U8 *b
Returns the number of UTF8 characters between the UTF-8 pointers C<a>
and C<b>.
WARNING: use only if you *know* that the pointers point inside the
same UTF-8 buffer.
-=cut */
+=cut
+*/
IV
Perl_utf8_distance(pTHX_ U8 *a, U8 *b)
}
/*
-=for apidoc Am|U8*|utf8_hop|U8 *s|I32 off
+=for apidoc A|U8 *|utf8_hop|U8 *s|I32 off
Return the UTF-8 pointer C<s> displaced by C<off> characters, either
forward or backward.
the UTF-8 data pointed to by C<s> *and* that on entry C<s> is aligned
on the first byte of character or just after the last byte of a character.
-=cut */
+=cut
+*/
U8 *
Perl_utf8_hop(pTHX_ U8 *s, I32 off)
}
/*
-=for apidoc Am|U8 *|utf8_to_bytes|U8 *s|STRLEN *len
+=for apidoc A|U8 *|utf8_to_bytes|U8 *s|STRLEN *len
Converts a string C<s> of length C<len> from UTF8 into byte encoding.
Unlike C<bytes_to_utf8>, this over-writes the original string, and
*/
U8 *
-Perl_utf8_to_bytes(pTHX_ U8* s, STRLEN *len)
+Perl_utf8_to_bytes(pTHX_ U8 *s, STRLEN *len)
{
U8 *send;
U8 *d;
for (send = s + *len; s < send; ) {
U8 c = *s++;
- if (c >= 0x80 &&
- ((s >= send) ||
- ((*s++ & 0xc0) != 0x80) || ((c & 0xfe) != 0xc2))) {
+ if (!UTF8_IS_INVARIANT(c) &&
+ (!UTF8_IS_DOWNGRADEABLE_START(c) || (s >= send)
+ || !(c = *s++) || !UTF8_IS_CONTINUATION(c))) {
*len = -1;
return 0;
}
d = s = save;
while (s < send) {
- if (*s < 0x80) {
- *d++ = *s++;
- }
- else {
- STRLEN ulen;
- *d++ = (U8)utf8_to_uv_simple(s, &ulen);
- s += ulen;
- }
+ STRLEN ulen;
+ *d++ = (U8)utf8_to_uvchr(s, &ulen);
+ s += ulen;
}
*d = '\0';
*len = d - save;
}
/*
-=for apidoc Am|U8 *|bytes_to_utf8|U8 *s|STRLEN *len
+=for apidoc A|U8 *|bytes_from_utf8|U8 *s|STRLEN *len|bool *is_utf8
+
+Converts a string C<s> of length C<len> from UTF8 into byte encoding.
+Unlike <utf8_to_bytes> but like C<bytes_to_utf8>, returns a pointer to
+the newly-created string, and updates C<len> to contain the new
+length. Returns the original string if no conversion occurs, C<len>
+is unchanged. Do nothing if C<is_utf8> points to 0. Sets C<is_utf8> to
+0 if C<s> is converted or contains all 7bit characters.
+
+=cut
+*/
+
+U8 *
+Perl_bytes_from_utf8(pTHX_ U8 *s, STRLEN *len, bool *is_utf8)
+{
+ U8 *d;
+ U8 *start = s;
+ U8 *send;
+ I32 count = 0;
+
+ if (!*is_utf8)
+ return start;
+
+ /* ensure valid UTF8 and chars < 256 before converting string */
+ for (send = s + *len; s < send;) {
+ U8 c = *s++;
+ if (!UTF8_IS_INVARIANT(c)) {
+ if (UTF8_IS_DOWNGRADEABLE_START(c) && s < send &&
+ (c = *s++) && UTF8_IS_CONTINUATION(c))
+ count++;
+ else
+ return start;
+ }
+ }
+
+ *is_utf8 = 0;
+
+ Newz(801, d, (*len) - count + 1, U8);
+ s = start; start = d;
+ while (s < send) {
+ U8 c = *s++;
+ if (!UTF8_IS_INVARIANT(c)) {
+ /* Then it is two-byte encoded */
+ c = UTF8_ACCUMULATE(NATIVE_TO_UTF(c), *s++);
+ c = ASCII_TO_NATIVE(c);
+ }
+ *d++ = c;
+ }
+ *d = '\0';
+ *len = d - start;
+ return start;
+}
+
+/*
+=for apidoc A|U8 *|bytes_to_utf8|U8 *s|STRLEN *len
Converts a string C<s> of length C<len> from ASCII into UTF8 encoding.
Returns a pointer to the newly-created string, and sets C<len> to
*/
U8*
-Perl_bytes_to_utf8(pTHX_ U8* s, STRLEN *len)
+Perl_bytes_to_utf8(pTHX_ U8 *s, STRLEN *len)
{
U8 *send;
U8 *d;
dst = d;
while (s < send) {
- if (*s < 0x80)
- *d++ = *s++;
+ UV uv = NATIVE_TO_ASCII(*s++);
+ if (UNI_IS_INVARIANT(uv))
+ *d++ = UTF_TO_NATIVE(uv);
else {
- UV uv = *s++;
- *d++ = (( uv >> 6) | 0xc0);
- *d++ = (( uv & 0x3f) | 0x80);
+ *d++ = UTF8_EIGHT_BIT_HI(uv);
+ *d++ = UTF8_EIGHT_BIT_LO(uv);
}
}
*d = '\0';
/* for now these are all defined (inefficiently) in terms of the utf8 versions */
bool
-Perl_is_uni_alnum(pTHX_ U32 c)
+Perl_is_uni_alnum(pTHX_ UV c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
- uv_to_utf8(tmpbuf, (UV)c);
+ uvchr_to_utf8(tmpbuf, (UV)c);
return is_utf8_alnum(tmpbuf);
}
bool
-Perl_is_uni_alnumc(pTHX_ U32 c)
+Perl_is_uni_alnumc(pTHX_ UV c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
- uv_to_utf8(tmpbuf, (UV)c);
+ uvchr_to_utf8(tmpbuf, (UV)c);
return is_utf8_alnumc(tmpbuf);
}
bool
-Perl_is_uni_idfirst(pTHX_ U32 c)
+Perl_is_uni_idfirst(pTHX_ UV c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
- uv_to_utf8(tmpbuf, (UV)c);
+ uvchr_to_utf8(tmpbuf, (UV)c);
return is_utf8_idfirst(tmpbuf);
}
bool
-Perl_is_uni_alpha(pTHX_ U32 c)
+Perl_is_uni_alpha(pTHX_ UV c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
- uv_to_utf8(tmpbuf, (UV)c);
+ uvchr_to_utf8(tmpbuf, (UV)c);
return is_utf8_alpha(tmpbuf);
}
bool
-Perl_is_uni_ascii(pTHX_ U32 c)
+Perl_is_uni_ascii(pTHX_ UV c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
- uv_to_utf8(tmpbuf, (UV)c);
+ uvchr_to_utf8(tmpbuf, (UV)c);
return is_utf8_ascii(tmpbuf);
}
bool
-Perl_is_uni_space(pTHX_ U32 c)
+Perl_is_uni_space(pTHX_ UV c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
- uv_to_utf8(tmpbuf, (UV)c);
+ uvchr_to_utf8(tmpbuf, (UV)c);
return is_utf8_space(tmpbuf);
}
bool
-Perl_is_uni_digit(pTHX_ U32 c)
+Perl_is_uni_digit(pTHX_ UV c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
- uv_to_utf8(tmpbuf, (UV)c);
+ uvchr_to_utf8(tmpbuf, (UV)c);
return is_utf8_digit(tmpbuf);
}
bool
-Perl_is_uni_upper(pTHX_ U32 c)
+Perl_is_uni_upper(pTHX_ UV c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
- uv_to_utf8(tmpbuf, (UV)c);
+ uvchr_to_utf8(tmpbuf, (UV)c);
return is_utf8_upper(tmpbuf);
}
bool
-Perl_is_uni_lower(pTHX_ U32 c)
+Perl_is_uni_lower(pTHX_ UV c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
- uv_to_utf8(tmpbuf, (UV)c);
+ uvchr_to_utf8(tmpbuf, (UV)c);
return is_utf8_lower(tmpbuf);
}
bool
-Perl_is_uni_cntrl(pTHX_ U32 c)
+Perl_is_uni_cntrl(pTHX_ UV c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
- uv_to_utf8(tmpbuf, (UV)c);
+ uvchr_to_utf8(tmpbuf, (UV)c);
return is_utf8_cntrl(tmpbuf);
}
bool
-Perl_is_uni_graph(pTHX_ U32 c)
+Perl_is_uni_graph(pTHX_ UV c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
- uv_to_utf8(tmpbuf, (UV)c);
+ uvchr_to_utf8(tmpbuf, (UV)c);
return is_utf8_graph(tmpbuf);
}
bool
-Perl_is_uni_print(pTHX_ U32 c)
+Perl_is_uni_print(pTHX_ UV c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
- uv_to_utf8(tmpbuf, (UV)c);
+ uvchr_to_utf8(tmpbuf, (UV)c);
return is_utf8_print(tmpbuf);
}
bool
-Perl_is_uni_punct(pTHX_ U32 c)
+Perl_is_uni_punct(pTHX_ UV c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
- uv_to_utf8(tmpbuf, (UV)c);
+ uvchr_to_utf8(tmpbuf, (UV)c);
return is_utf8_punct(tmpbuf);
}
bool
-Perl_is_uni_xdigit(pTHX_ U32 c)
+Perl_is_uni_xdigit(pTHX_ UV c)
{
- U8 tmpbuf[UTF8_MAXLEN+1];
- uv_to_utf8(tmpbuf, (UV)c);
+ U8 tmpbuf[UTF8_MAXLEN_UCLC+1];
+ uvchr_to_utf8(tmpbuf, (UV)c);
return is_utf8_xdigit(tmpbuf);
}
-U32
-Perl_to_uni_upper(pTHX_ U32 c)
+UV
+Perl_to_uni_upper(pTHX_ UV c, U8* p, STRLEN *lenp)
{
- U8 tmpbuf[UTF8_MAXLEN+1];
- uv_to_utf8(tmpbuf, (UV)c);
- return to_utf8_upper(tmpbuf);
+ U8 tmpbuf[UTF8_MAXLEN_UCLC+1];
+ uvchr_to_utf8(tmpbuf, (UV)c);
+ return to_utf8_upper(tmpbuf, p, lenp);
}
-U32
-Perl_to_uni_title(pTHX_ U32 c)
+UV
+Perl_to_uni_title(pTHX_ UV c, U8* p, STRLEN *lenp)
{
- U8 tmpbuf[UTF8_MAXLEN+1];
- uv_to_utf8(tmpbuf, (UV)c);
- return to_utf8_title(tmpbuf);
+ U8 tmpbuf[UTF8_MAXLEN_UCLC+1];
+ uvchr_to_utf8(tmpbuf, (UV)c);
+ return to_utf8_title(tmpbuf, p, lenp);
}
-U32
-Perl_to_uni_lower(pTHX_ U32 c)
+UV
+Perl_to_uni_lower(pTHX_ UV c, U8* p, STRLEN *lenp)
{
- U8 tmpbuf[UTF8_MAXLEN+1];
- uv_to_utf8(tmpbuf, (UV)c);
- return to_utf8_lower(tmpbuf);
+ U8 tmpbuf[UTF8_MAXLEN_UCLC+1];
+ uvchr_to_utf8(tmpbuf, (UV)c);
+ return to_utf8_lower(tmpbuf, p, lenp);
+}
+
+UV
+Perl_to_uni_fold(pTHX_ UV c, U8* p, STRLEN *lenp)
+{
+ U8 tmpbuf[UTF8_MAXLEN_FOLD+1];
+ uvchr_to_utf8(tmpbuf, (UV)c);
+ return to_utf8_fold(tmpbuf, p, lenp);
}
/* for now these all assume no locale info available for Unicode > 255 */
bool
-Perl_is_uni_alnum_lc(pTHX_ U32 c)
+Perl_is_uni_alnum_lc(pTHX_ UV c)
{
return is_uni_alnum(c); /* XXX no locale support yet */
}
bool
-Perl_is_uni_alnumc_lc(pTHX_ U32 c)
+Perl_is_uni_alnumc_lc(pTHX_ UV c)
{
return is_uni_alnumc(c); /* XXX no locale support yet */
}
bool
-Perl_is_uni_idfirst_lc(pTHX_ U32 c)
+Perl_is_uni_idfirst_lc(pTHX_ UV c)
{
return is_uni_idfirst(c); /* XXX no locale support yet */
}
bool
-Perl_is_uni_alpha_lc(pTHX_ U32 c)
+Perl_is_uni_alpha_lc(pTHX_ UV c)
{
return is_uni_alpha(c); /* XXX no locale support yet */
}
bool
-Perl_is_uni_ascii_lc(pTHX_ U32 c)
+Perl_is_uni_ascii_lc(pTHX_ UV c)
{
return is_uni_ascii(c); /* XXX no locale support yet */
}
bool
-Perl_is_uni_space_lc(pTHX_ U32 c)
+Perl_is_uni_space_lc(pTHX_ UV c)
{
return is_uni_space(c); /* XXX no locale support yet */
}
bool
-Perl_is_uni_digit_lc(pTHX_ U32 c)
+Perl_is_uni_digit_lc(pTHX_ UV c)
{
return is_uni_digit(c); /* XXX no locale support yet */
}
bool
-Perl_is_uni_upper_lc(pTHX_ U32 c)
+Perl_is_uni_upper_lc(pTHX_ UV c)
{
return is_uni_upper(c); /* XXX no locale support yet */
}
bool
-Perl_is_uni_lower_lc(pTHX_ U32 c)
+Perl_is_uni_lower_lc(pTHX_ UV c)
{
return is_uni_lower(c); /* XXX no locale support yet */
}
bool
-Perl_is_uni_cntrl_lc(pTHX_ U32 c)
+Perl_is_uni_cntrl_lc(pTHX_ UV c)
{
return is_uni_cntrl(c); /* XXX no locale support yet */
}
bool
-Perl_is_uni_graph_lc(pTHX_ U32 c)
+Perl_is_uni_graph_lc(pTHX_ UV c)
{
return is_uni_graph(c); /* XXX no locale support yet */
}
bool
-Perl_is_uni_print_lc(pTHX_ U32 c)
+Perl_is_uni_print_lc(pTHX_ UV c)
{
return is_uni_print(c); /* XXX no locale support yet */
}
bool
-Perl_is_uni_punct_lc(pTHX_ U32 c)
+Perl_is_uni_punct_lc(pTHX_ UV c)
{
return is_uni_punct(c); /* XXX no locale support yet */
}
bool
-Perl_is_uni_xdigit_lc(pTHX_ U32 c)
+Perl_is_uni_xdigit_lc(pTHX_ UV c)
{
return is_uni_xdigit(c); /* XXX no locale support yet */
}
U32
Perl_to_uni_upper_lc(pTHX_ U32 c)
{
- return to_uni_upper(c); /* XXX no locale support yet */
+ /* XXX returns only the first character -- do not use XXX */
+ /* XXX no locale support yet */
+ STRLEN len;
+ U8 tmpbuf[UTF8_MAXLEN_UCLC+1];
+ return (U32)to_uni_upper(c, tmpbuf, &len);
}
U32
Perl_to_uni_title_lc(pTHX_ U32 c)
{
- return to_uni_title(c); /* XXX no locale support yet */
+ /* XXX returns only the first character XXX -- do not use XXX */
+ /* XXX no locale support yet */
+ STRLEN len;
+ U8 tmpbuf[UTF8_MAXLEN_UCLC+1];
+ return (U32)to_uni_title(c, tmpbuf, &len);
}
U32
Perl_to_uni_lower_lc(pTHX_ U32 c)
{
- return to_uni_lower(c); /* XXX no locale support yet */
+ /* XXX returns only the first character -- do not use XXX */
+ /* XXX no locale support yet */
+ STRLEN len;
+ U8 tmpbuf[UTF8_MAXLEN_UCLC+1];
+ return (U32)to_uni_lower(c, tmpbuf, &len);
}
bool
* descendant of isalnum(3), in other words, it doesn't
* contain the '_'. --jhi */
PL_utf8_alnum = swash_init("utf8", "IsWord", &PL_sv_undef, 0, 0);
- return swash_fetch(PL_utf8_alnum, p);
+ return swash_fetch(PL_utf8_alnum, p, TRUE);
/* return *p == '_' || is_utf8_alpha(p) || is_utf8_digit(p); */
#ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */
if (!PL_utf8_alnum)
PL_utf8_alnum = swash_init("utf8", "",
sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0);
- return swash_fetch(PL_utf8_alnum, p);
+ return swash_fetch(PL_utf8_alnum, p, TRUE);
#endif
}
return FALSE;
if (!PL_utf8_alnum)
PL_utf8_alnum = swash_init("utf8", "IsAlnumC", &PL_sv_undef, 0, 0);
- return swash_fetch(PL_utf8_alnum, p);
+ return swash_fetch(PL_utf8_alnum, p, TRUE);
/* return is_utf8_alpha(p) || is_utf8_digit(p); */
#ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */
if (!PL_utf8_alnum)
PL_utf8_alnum = swash_init("utf8", "",
sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0);
- return swash_fetch(PL_utf8_alnum, p);
+ return swash_fetch(PL_utf8_alnum, p, TRUE);
#endif
}
return FALSE;
if (!PL_utf8_alpha)
PL_utf8_alpha = swash_init("utf8", "IsAlpha", &PL_sv_undef, 0, 0);
- return swash_fetch(PL_utf8_alpha, p);
+ return swash_fetch(PL_utf8_alpha, p, TRUE);
}
bool
return FALSE;
if (!PL_utf8_ascii)
PL_utf8_ascii = swash_init("utf8", "IsAscii", &PL_sv_undef, 0, 0);
- return swash_fetch(PL_utf8_ascii, p);
+ return swash_fetch(PL_utf8_ascii, p, TRUE);
}
bool
return FALSE;
if (!PL_utf8_space)
PL_utf8_space = swash_init("utf8", "IsSpacePerl", &PL_sv_undef, 0, 0);
- return swash_fetch(PL_utf8_space, p);
+ return swash_fetch(PL_utf8_space, p, TRUE);
}
bool
return FALSE;
if (!PL_utf8_digit)
PL_utf8_digit = swash_init("utf8", "IsDigit", &PL_sv_undef, 0, 0);
- return swash_fetch(PL_utf8_digit, p);
+ return swash_fetch(PL_utf8_digit, p, TRUE);
}
bool
return FALSE;
if (!PL_utf8_upper)
PL_utf8_upper = swash_init("utf8", "IsUpper", &PL_sv_undef, 0, 0);
- return swash_fetch(PL_utf8_upper, p);
+ return swash_fetch(PL_utf8_upper, p, TRUE);
}
bool
return FALSE;
if (!PL_utf8_lower)
PL_utf8_lower = swash_init("utf8", "IsLower", &PL_sv_undef, 0, 0);
- return swash_fetch(PL_utf8_lower, p);
+ return swash_fetch(PL_utf8_lower, p, TRUE);
}
bool
return FALSE;
if (!PL_utf8_cntrl)
PL_utf8_cntrl = swash_init("utf8", "IsCntrl", &PL_sv_undef, 0, 0);
- return swash_fetch(PL_utf8_cntrl, p);
+ return swash_fetch(PL_utf8_cntrl, p, TRUE);
}
bool
return FALSE;
if (!PL_utf8_graph)
PL_utf8_graph = swash_init("utf8", "IsGraph", &PL_sv_undef, 0, 0);
- return swash_fetch(PL_utf8_graph, p);
+ return swash_fetch(PL_utf8_graph, p, TRUE);
}
bool
return FALSE;
if (!PL_utf8_print)
PL_utf8_print = swash_init("utf8", "IsPrint", &PL_sv_undef, 0, 0);
- return swash_fetch(PL_utf8_print, p);
+ return swash_fetch(PL_utf8_print, p, TRUE);
}
bool
return FALSE;
if (!PL_utf8_punct)
PL_utf8_punct = swash_init("utf8", "IsPunct", &PL_sv_undef, 0, 0);
- return swash_fetch(PL_utf8_punct, p);
+ return swash_fetch(PL_utf8_punct, p, TRUE);
}
bool
return FALSE;
if (!PL_utf8_xdigit)
PL_utf8_xdigit = swash_init("utf8", "IsXDigit", &PL_sv_undef, 0, 0);
- return swash_fetch(PL_utf8_xdigit, p);
+ return swash_fetch(PL_utf8_xdigit, p, TRUE);
}
bool
return FALSE;
if (!PL_utf8_mark)
PL_utf8_mark = swash_init("utf8", "IsM", &PL_sv_undef, 0, 0);
- return swash_fetch(PL_utf8_mark, p);
+ return swash_fetch(PL_utf8_mark, p, TRUE);
}
+/*
+=for apidoc A|UV|to_utf8_case|U8 *p|U8* ustrp|STRLEN *lenp|SV **swash|char *normal|char *special
+
+The "p" contains the pointer to the UTF-8 string encoding
+the character that is being converted.
+
+The "ustrp" is a pointer to the character buffer to put the
+conversion result to. The "lenp" is a pointer to the length
+of the result.
+
+The "swash" is a pointer to the swash to use.
+
+The "normal" is a string like "ToLower" which means the swash
+$utf8::ToLower, which is stored in lib/unicore/To/Lower.pl,
+and loaded by SWASHGET, using lib/utf8_heavy.pl.
+
+The "special" is a string like "utf8::ToSpecLower", which means
+the hash %utf8::ToSpecLower, which is stored in the same file,
+lib/unicore/To/Lower.pl, and also loaded by SWASHGET. The access
+to the hash is by Perl_to_utf8_case().
+
+=cut
+ */
+
UV
-Perl_to_utf8_upper(pTHX_ U8 *p)
+Perl_to_utf8_case(pTHX_ U8 *p, U8* ustrp, STRLEN *lenp, SV **swashp,char *normal, char *special)
{
UV uv;
- if (!PL_utf8_toupper)
- PL_utf8_toupper = swash_init("utf8", "ToUpper", &PL_sv_undef, 4, 0);
- uv = swash_fetch(PL_utf8_toupper, p);
- return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0);
+ if (!*swashp)
+ *swashp = swash_init("utf8", normal, &PL_sv_undef, 4, 0);
+ uv = swash_fetch(*swashp, p, TRUE);
+ if (uv)
+ uv = UNI_TO_NATIVE(uv);
+ else {
+ HV *hv;
+ SV *keysv;
+ HE *he;
+
+ uv = utf8_to_uvchr(p, 0);
+
+ if ((hv = get_hv(special, FALSE)) &&
+ (keysv = sv_2mortal(Perl_newSVpvf(aTHX_ "%04"UVXf, uv))) &&
+ (he = hv_fetch_ent(hv, keysv, FALSE, 0))) {
+ SV *val = HeVAL(he);
+ char *s = SvPV(val, *lenp);
+ U8 c = *(U8*)s;
+ if (*lenp > 1 || UNI_IS_INVARIANT(c))
+ Copy(s, ustrp, *lenp, U8);
+ else {
+ /* something in the 0x80..0xFF range */
+ ustrp[0] = UTF8_EIGHT_BIT_HI(c);
+ ustrp[1] = UTF8_EIGHT_BIT_LO(c);
+ *lenp = 2;
+ }
+ return utf8_to_uvchr(ustrp, 0);
+ }
+ }
+ if (lenp)
+ *lenp = UNISKIP(uv);
+ uvuni_to_utf8(ustrp, uv);
+ return uv;
}
+/*
+=for apidoc A|UV|to_utf8_upper|U8 *p|U8 *ustrp|STRLEN *lenp
+
+Convert the UTF-8 encoded character at p to its uppercase version and
+store that in UTF-8 in ustrp and its length in bytes in lenp. Note
+that the ustrp needs to be at least UTF8_MAXLEN_UCLC+1 bytes since the
+uppercase version may be longer than the original character (up to two
+characters).
+
+The first character of the uppercased version is returned
+(but note, as explained above, that there may be more.)
+
+=cut */
+
UV
-Perl_to_utf8_title(pTHX_ U8 *p)
+Perl_to_utf8_upper(pTHX_ U8 *p, U8* ustrp, STRLEN *lenp)
{
- UV uv;
+ return Perl_to_utf8_case(aTHX_ p, ustrp, lenp,
+ &PL_utf8_toupper, "ToUpper", "utf8::ToSpecUpper");
+}
+
+/*
+=for apidoc A|UV|to_utf8_title|U8 *p|U8 *ustrp|STRLEN *lenp
+
+Convert the UTF-8 encoded character at p to its titlecase version and
+store that in UTF-8 in ustrp and its length in bytes in lenp. Note
+that the ustrp needs to be at least UTF8_MAXLEN_UCLC+1 bytes since the
+titlecase version may be longer than the original character (up to two
+characters).
- if (!PL_utf8_totitle)
- PL_utf8_totitle = swash_init("utf8", "ToTitle", &PL_sv_undef, 4, 0);
- uv = swash_fetch(PL_utf8_totitle, p);
- return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0);
+The first character of the titlecased version is returned
+(but note, as explained above, that there may be more.)
+
+=cut */
+
+UV
+Perl_to_utf8_title(pTHX_ U8 *p, U8* ustrp, STRLEN *lenp)
+{
+ return Perl_to_utf8_case(aTHX_ p, ustrp, lenp,
+ &PL_utf8_totitle, "ToTitle", "utf8::ToSpecTitle");
}
+/*
+=for apidoc A|UV|to_utf8_lower|U8 *p|U8 *ustrp|STRLEN *lenp
+
+Convert the UTF-8 encoded character at p to its lowercase version and
+store that in UTF-8 in ustrp and its length in bytes in lenp. Note
+that the ustrp needs to be at least UTF8_MAXLEN_UCLC+1 bytes since the
+lowercase version may be longer than the original character (up to two
+characters).
+
+The first character of the lowercased version is returned
+(but note, as explained above, that there may be more.)
+
+=cut */
+
UV
-Perl_to_utf8_lower(pTHX_ U8 *p)
+Perl_to_utf8_lower(pTHX_ U8 *p, U8* ustrp, STRLEN *lenp)
{
- UV uv;
+ return Perl_to_utf8_case(aTHX_ p, ustrp, lenp,
+ &PL_utf8_tolower, "ToLower", "utf8::ToSpecLower");
+}
+
+/*
+=for apidoc A|UV|to_utf8_fold|U8 *p|U8 *ustrp|STRLEN *lenp
+
+Convert the UTF-8 encoded character at p to its foldcase version and
+store that in UTF-8 in ustrp and its length in bytes in lenp. Note
+that the ustrp needs to be at least UTF8_MAXLEN_FOLD+1 bytes since the
+foldcase version may be longer than the original character (up to
+three characters).
+
+The first character of the foldcased version is returned
+(but note, as explained above, that there may be more.)
+
+=cut */
- if (!PL_utf8_tolower)
- PL_utf8_tolower = swash_init("utf8", "ToLower", &PL_sv_undef, 4, 0);
- uv = swash_fetch(PL_utf8_tolower, p);
- return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0);
+UV
+Perl_to_utf8_fold(pTHX_ U8 *p, U8* ustrp, STRLEN *lenp)
+{
+ return Perl_to_utf8_case(aTHX_ p, ustrp, lenp,
+ &PL_utf8_tofold, "ToFold", "utf8::ToSpecFold");
}
/* a "swash" is a swatch hash */
Perl_swash_init(pTHX_ char* pkg, char* name, SV *listsv, I32 minbits, I32 none)
{
SV* retval;
- char tmpbuf[256];
+ SV* tokenbufsv = sv_2mortal(NEWSV(0,0));
dSP;
+ HV *stash = gv_stashpvn(pkg, strlen(pkg), FALSE);
+ SV* errsv_save;
- if (!gv_stashpv(pkg, 0)) { /* demand load utf8 */
+ if (!gv_fetchmeth(stash, "SWASHNEW", 8, -1)) { /* demand load utf8 */
ENTER;
+ errsv_save = newSVsv(ERRSV);
Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, newSVpv(pkg,0), Nullsv);
+ if (!SvTRUE(ERRSV))
+ sv_setsv(ERRSV, errsv_save);
+ SvREFCNT_dec(errsv_save);
LEAVE;
}
SPAGAIN;
SAVEI32(PL_hints);
PL_hints = 0;
save_re_context();
- if (PL_curcop == &PL_compiling) /* XXX ought to be handled by lex_start */
- strncpy(tmpbuf, PL_tokenbuf, sizeof tmpbuf);
+ if (PL_curcop == &PL_compiling)
+ /* XXX ought to be handled by lex_start */
+ sv_setpv(tokenbufsv, PL_tokenbuf);
+ errsv_save = newSVsv(ERRSV);
if (call_method("SWASHNEW", G_SCALAR))
retval = newSVsv(*PL_stack_sp--);
else
retval = &PL_sv_undef;
+ if (!SvTRUE(ERRSV))
+ sv_setsv(ERRSV, errsv_save);
+ SvREFCNT_dec(errsv_save);
LEAVE;
POPSTACK;
if (PL_curcop == &PL_compiling) {
- strncpy(PL_tokenbuf, tmpbuf, sizeof tmpbuf);
+ STRLEN len;
+ char* pv = SvPV(tokenbufsv, len);
+
+ Copy(pv, PL_tokenbuf, len+1, char);
PL_curcop->op_private = PL_hints;
}
if (!SvROK(retval) || SvTYPE(SvRV(retval)) != SVt_PVHV)
return retval;
}
+
+/* This API is wrong for special case conversions since we may need to
+ * return several Unicode characters for a single Unicode character
+ * (see lib/unicore/SpecCase.txt) The SWASHGET in lib/utf8_heavy.pl is
+ * the lower-level routine, and it is similarly broken for returning
+ * multiple values. --jhi */
UV
-Perl_swash_fetch(pTHX_ SV *sv, U8 *ptr)
+Perl_swash_fetch(pTHX_ SV *sv, U8 *ptr, bool do_utf8)
{
HV* hv = (HV*)SvRV(sv);
- U32 klen = UTF8SKIP(ptr) - 1;
- U32 off = ptr[klen] & 127; /* NB: 64 bit always 0 when len > 1 */
+ U32 klen;
+ U32 off;
STRLEN slen;
- STRLEN needents = (klen ? 64 : 128);
- U8 *tmps;
+ STRLEN needents;
+ U8 *tmps = NULL;
U32 bit;
SV *retval;
+ U8 tmputf8[2];
+ UV c = NATIVE_TO_ASCII(*ptr);
+
+ if (!do_utf8 && !UNI_IS_INVARIANT(c)) {
+ tmputf8[0] = UTF8_EIGHT_BIT_HI(c);
+ tmputf8[1] = UTF8_EIGHT_BIT_LO(c);
+ ptr = tmputf8;
+ }
+ /* Given a UTF-X encoded char 0xAA..0xYY,0xZZ
+ * then the "swatch" is a vec() for al the chars which start
+ * with 0xAA..0xYY
+ * So the key in the hash (klen) is length of encoded char -1
+ */
+ klen = UTF8SKIP(ptr) - 1;
+ off = ptr[klen];
+
+ if (klen == 0)
+ {
+ /* If char in invariant then swatch is for all the invariant chars
+ * In both UTF-8 and UTF8-MOD that happens to be UTF_CONTINUATION_MARK
+ */
+ needents = UTF_CONTINUATION_MARK;
+ off = NATIVE_TO_UTF(ptr[klen]);
+ }
+ else
+ {
+ /* If char is encoded then swatch is for the prefix */
+ needents = (1 << UTF_ACCUMULATION_SHIFT);
+ off = NATIVE_TO_UTF(ptr[klen]) & UTF_CONTINUATION_MASK;
+ }
/*
* This single-entry cache saves about 1/3 of the utf8 overhead in test
* NB: this code assumes that swatches are never modified, once generated!
*/
- if (hv == PL_last_swash_hv &&
+ if (hv == PL_last_swash_hv &&
klen == PL_last_swash_klen &&
- (!klen || memEQ((char *)ptr,(char *)PL_last_swash_key,klen)) )
+ (!klen || memEQ((char *)ptr, (char *)PL_last_swash_key, klen)) )
{
tmps = PL_last_swash_tmps;
slen = PL_last_swash_slen;
/* If not cached, generate it via utf8::SWASHGET */
if (!svp || !SvPOK(*svp) || !(tmps = (U8*)SvPV(*svp, slen))) {
dSP;
+ /* We use utf8n_to_uvuni() as we want an index into
+ Unicode tables, not a native character number.
+ */
+ UV code_point = utf8n_to_uvuni(ptr, UTF8_MAXLEN, NULL, 0);
+ SV *errsv_save;
ENTER;
SAVETMPS;
save_re_context();
PUSHMARK(SP);
EXTEND(SP,3);
PUSHs((SV*)sv);
- PUSHs(sv_2mortal(newSViv(utf8_to_uv(ptr, UTF8_MAXLEN, 0, 0) & ~(needents - 1))));
+ /* On EBCDIC & ~(0xA0-1) isn't a useful thing to do */
+ PUSHs(sv_2mortal(newSViv((klen) ?
+ (code_point & ~(needents - 1)) : 0)));
PUSHs(sv_2mortal(newSViv(needents)));
PUTBACK;
+ errsv_save = newSVsv(ERRSV);
if (call_method("SWASHGET", G_SCALAR))
retval = newSVsv(*PL_stack_sp--);
else
retval = &PL_sv_undef;
+ if (!SvTRUE(ERRSV))
+ sv_setsv(ERRSV, errsv_save);
+ SvREFCNT_dec(errsv_save);
POPSTACK;
FREETMPS;
LEAVE;
svp = hv_store(hv, (char*)ptr, klen, retval, 0);
- if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) || slen < 8)
+ if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) || (slen << 3) < needents)
Perl_croak(aTHX_ "SWASHGET didn't return result of proper length");
}
Perl_croak(aTHX_ "panic: swash_fetch");
return 0;
}
+
+
+/*
+=for apidoc A|U8 *|uvchr_to_utf8|U8 *d|UV uv
+
+Adds the UTF8 representation of the Native codepoint C<uv> to the end
+of the string C<d>; C<d> should be have at least C<UTF8_MAXLEN+1> free
+bytes available. The return value is the pointer to the byte after the
+end of the new character. In other words,
+
+ d = uvchr_to_utf8(d, uv);
+
+is the recommended wide native character-aware way of saying
+
+ *(d++) = uv;
+
+=cut
+*/
+
+/* On ASCII machines this is normally a macro but we want a
+ real function in case XS code wants it
+*/
+#undef Perl_uvchr_to_utf8
+U8 *
+Perl_uvchr_to_utf8(pTHX_ U8 *d, UV uv)
+{
+ return Perl_uvuni_to_utf8_flags(aTHX_ d, NATIVE_TO_UNI(uv), 0);
+}
+
+U8 *
+Perl_uvchr_to_utf8_flags(pTHX_ U8 *d, UV uv, UV flags)
+{
+ return Perl_uvuni_to_utf8_flags(aTHX_ d, NATIVE_TO_UNI(uv), flags);
+}
+
+/*
+=for apidoc A|UV|utf8n_to_uvchr|U8 *s|STRLEN curlen|STRLEN *retlen|U32 flags
+
+Returns the native character value of the first character in the string C<s>
+which is assumed to be in UTF8 encoding; C<retlen> will be set to the
+length, in bytes, of that character.
+
+Allows length and flags to be passed to low level routine.
+
+=cut
+*/
+/* On ASCII machines this is normally a macro but we want
+ a real function in case XS code wants it
+*/
+#undef Perl_utf8n_to_uvchr
+UV
+Perl_utf8n_to_uvchr(pTHX_ U8 *s, STRLEN curlen, STRLEN *retlen, U32 flags)
+{
+ UV uv = Perl_utf8n_to_uvuni(aTHX_ s, curlen, retlen, flags);
+ return UNI_TO_NATIVE(uv);
+}
+
+/*
+=for apidoc A|char *|pv_uni_display|SV *dsv|U8 *spv|STRLEN len|STRLEN pvlim|UV flags
+
+Build to the scalar dsv a displayable version of the string spv,
+length len, the displayable version being at most pvlim bytes long
+(if longer, the rest is truncated and "..." will be appended).
+
+The flags argument can have UNI_DISPLAY_ISPRINT set to display
+isPRINT()able characters as themselves, UNI_DISPLAY_BACKSLASH
+to display the \\[nrfta\\] as the backslashed versions (like '\n')
+(UNI_DISPLAY_BACKSLASH is preferred over UNI_DISPLAY_ISPRINT for \\).
+UNI_DISPLAY_QQ (and its alias UNI_DISPLAY_REGEX) have both
+UNI_DISPLAY_BACKSLASH and UNI_DISPLAY_ISPRINT turned on.
+
+The pointer to the PV of the dsv is returned.
+
+=cut */
+char *
+Perl_pv_uni_display(pTHX_ SV *dsv, U8 *spv, STRLEN len, STRLEN pvlim, UV flags)
+{
+ int truncated = 0;
+ char *s, *e;
+
+ sv_setpvn(dsv, "", 0);
+ for (s = (char *)spv, e = s + len; s < e; s += UTF8SKIP(s)) {
+ UV u;
+ bool ok = FALSE;
+
+ if (pvlim && SvCUR(dsv) >= pvlim) {
+ truncated++;
+ break;
+ }
+ u = utf8_to_uvchr((U8*)s, 0);
+ if (u < 256) {
+ if (!ok && (flags & UNI_DISPLAY_BACKSLASH)) {
+ switch (u & 0xFF) {
+ case '\n':
+ Perl_sv_catpvf(aTHX_ dsv, "\\n"); ok = TRUE; break;
+ case '\r':
+ Perl_sv_catpvf(aTHX_ dsv, "\\r"); ok = TRUE; break;
+ case '\t':
+ Perl_sv_catpvf(aTHX_ dsv, "\\t"); ok = TRUE; break;
+ case '\f':
+ Perl_sv_catpvf(aTHX_ dsv, "\\f"); ok = TRUE; break;
+ case '\a':
+ Perl_sv_catpvf(aTHX_ dsv, "\\a"); ok = TRUE; break;
+ case '\\':
+ Perl_sv_catpvf(aTHX_ dsv, "\\" ); ok = TRUE; break;
+ default: break;
+ }
+ }
+ /* isPRINT() is the locale-blind version. */
+ if (!ok && (flags & UNI_DISPLAY_ISPRINT) && isPRINT(u & 0xFF)) {
+ Perl_sv_catpvf(aTHX_ dsv, "%c", u);
+ ok = TRUE;
+ }
+ }
+ if (!ok)
+ Perl_sv_catpvf(aTHX_ dsv, "\\x{%"UVxf"}", u);
+ }
+ if (truncated)
+ sv_catpvn(dsv, "...", 3);
+
+ return SvPVX(dsv);
+}
+
+/*
+=for apidoc A|char *|sv_uni_display|SV *dsv|SV *ssv|STRLEN pvlim|UV flags
+
+Build to the scalar dsv a displayable version of the scalar sv,
+the displayable version being at most pvlim bytes long
+(if longer, the rest is truncated and "..." will be appended).
+
+The flags argument is as in pv_uni_display().
+
+The pointer to the PV of the dsv is returned.
+
+=cut */
+char *
+Perl_sv_uni_display(pTHX_ SV *dsv, SV *ssv, STRLEN pvlim, UV flags)
+{
+ return Perl_pv_uni_display(aTHX_ dsv, (U8*)SvPVX(ssv), SvCUR(ssv),
+ pvlim, flags);
+}
+
+/*
+=for apidoc A|I32|ibcmp_utf8|const char *s1|char **pe1|register UV l1|bool u1|const char *s2|char **pe2|register UV l2|bool u2
+
+Return true if the strings s1 and s2 differ case-insensitively, false
+if not (if they are equal case-insensitively). If u1 is true, the
+string s1 is assumed to be in UTF-8-encoded Unicode. If u2 is true,
+the string s2 is assumed to be in UTF-8-encoded Unicode. If u1 or u2
+are false, the respective string is assumed to be in native 8-bit
+encoding.
+
+If the pe1 and pe2 are non-NULL, the scanning pointers will be copied
+in there (they will point at the beginning of the I<next> character).
+If the pointers behind pe1 or pe2 are non-NULL, they are the end
+pointers beyond which scanning will not continue under any
+circustances. If the byte lengths l1 and l2 are non-zero, s1+l1 and
+s2+l2 will be used as goal end pointers that will also stop the scan,
+and which qualify towards defining a successful match: all the scans
+that define an explicit length must reach their goal pointers for
+a match to succeed).
+
+For case-insensitiveness, the "casefolding" of Unicode is used
+instead of upper/lowercasing both the characters, see
+http://www.unicode.org/unicode/reports/tr21/ (Case Mappings).
+
+=cut */
+I32
+Perl_ibcmp_utf8(pTHX_ const char *s1, char **pe1, register UV l1, bool u1, const char *s2, char **pe2, register UV l2, bool u2)
+{
+ register U8 *p1 = (U8*)s1;
+ register U8 *p2 = (U8*)s2;
+ register U8 *e1 = 0, *f1 = 0, *q1 = 0;
+ register U8 *e2 = 0, *f2 = 0, *q2 = 0;
+ STRLEN n1 = 0, n2 = 0;
+ U8 foldbuf1[UTF8_MAXLEN_FOLD+1];
+ U8 foldbuf2[UTF8_MAXLEN_FOLD+1];
+ U8 natbuf[1+1];
+ STRLEN foldlen1, foldlen2;
+ bool match;
+
+ if (pe1)
+ e1 = *(U8**)pe1;
+ if (e1 == 0 || (l1 && l1 < e1 - (U8*)s1))
+ f1 = (U8*)s1 + l1;
+ if (pe2)
+ e2 = *(U8**)pe2;
+ if (e2 == 0 || (l2 && l2 < e2 - (U8*)s2))
+ f2 = (U8*)s2 + l2;
+
+ if ((e1 == 0 && f1 == 0) || (e2 == 0 && f2 == 0) || (f1 == 0 && f2 == 0))
+ return 1; /* mismatch; possible infinite loop or false positive */
+
+ while ((e1 == 0 || p1 < e1) &&
+ (f1 == 0 || p1 < f1) &&
+ (e2 == 0 || p2 < e2) &&
+ (f2 == 0 || p2 < f2)) {
+ if (n1 == 0) {
+ if (u1)
+ to_utf8_fold(p1, foldbuf1, &foldlen1);
+ else {
+ natbuf[0] = NATIVE_TO_UNI(*p1);
+ to_utf8_fold(natbuf, foldbuf1, &foldlen1);
+ }
+ q1 = foldbuf1;
+ n1 = foldlen1;
+ }
+ if (n2 == 0) {
+ if (u2)
+ to_utf8_fold(p2, foldbuf2, &foldlen2);
+ else {
+ natbuf[0] = NATIVE_TO_UNI(*p2);
+ to_utf8_fold(natbuf, foldbuf2, &foldlen2);
+ }
+ q2 = foldbuf2;
+ n2 = foldlen2;
+ }
+ while (n1 && n2) {
+ if ( UTF8SKIP(q1) != UTF8SKIP(q2) ||
+ (UTF8SKIP(q1) == 1 && *q1 != *q2) ||
+ memNE((char*)q1, (char*)q2, UTF8SKIP(q1)) )
+ return 1; /* mismatch */
+ n1 -= UTF8SKIP(q1);
+ q1 += UTF8SKIP(q1);
+ n2 -= UTF8SKIP(q2);
+ q2 += UTF8SKIP(q2);
+ }
+ if (n1 == 0)
+ p1 += u1 ? UTF8SKIP(p1) : 1;
+ if (n2 == 0)
+ p2 += u2 ? UTF8SKIP(p2) : 1;
+
+ }
+
+ /* A match is defined by all the scans that specified
+ * an explicit length reaching their final goals. */
+ match = (f1 == 0 || p1 == f1) && (f2 == 0 || p2 == f2);
+
+ if (match) {
+ if (pe1)
+ *pe1 = (char*)p1;
+ if (pe2)
+ *pe2 = (char*)p2;
+ }
+
+ return match ? 0 : 1; /* 0 match, 1 mismatch */
+}
+
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