/* utf8.c
*
- * Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005 by Larry Wall and
- * others
+ * Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ * by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*/
/*
- * 'What a fix!' said Sam. 'That's the one place in all the lands we've ever
- * heard of that we don't want to see any closer; and that's the one place
- * we're trying to get to! And that's just where we can't get, nohow.'
+ * 'What a fix!' said Sam. 'That's the one place in all the lands we've ever
+ * heard of that we don't want to see any closer; and that's the one place
+ * we're trying to get to! And that's just where we can't get, nohow.'
+ *
+ * [p.603 of _The Lord of the Rings_, IV/I: "The Taming of Sméagol"]
*
* 'Well do I understand your speech,' he answered in the same language;
* 'yet few strangers do so. Why then do you not speak in the Common Tongue,
- * as is the custom in the West, if you wish to be answered?'
+ * as is the custom in the West, if you wish to be answered?'
+ * --Gandalf, addressing Théoden's door wardens
+ *
+ * [p.508 of _The Lord of the Rings_, III/vi: "The King of the Golden Hall"]
*
* ...the travellers perceived that the floor was paved with stones of many
* hues; branching runes and strange devices intertwined beneath their feet.
+ *
+ * [p.512 of _The Lord of the Rings_, III/vi: "The King of the Golden Hall"]
*/
#include "EXTERN.h"
#define PERL_IN_UTF8_C
#include "perl.h"
+#ifndef EBCDIC
+/* Separate prototypes needed because in ASCII systems these are
+ * usually macros but they still are compiled as code, too. */
+PERL_CALLCONV UV Perl_utf8n_to_uvchr(pTHX_ const U8 *s, STRLEN curlen, STRLEN *retlen, U32 flags);
+PERL_CALLCONV U8* Perl_uvchr_to_utf8(pTHX_ U8 *d, UV uv);
+#endif
+
static const char unees[] =
"Malformed UTF-8 character (unexpected end of string)";
-/*
+/*
=head1 Unicode Support
This file contains various utility functions for manipulating UTF8-encoded
characters in the ASCII range are unmodified, and a zero byte never appears
within non-zero characters.
-=for apidoc A|U8 *|uvuni_to_utf8_flags|U8 *d|UV uv|UV flags
+=cut
+*/
+
+/*
+=for apidoc is_ascii_string
+
+Returns true if the first C<len> bytes of the given string are the same whether
+or not the string is encoded in UTF-8 (or UTF-EBCDIC on EBCDIC machines). That
+is, if they are invariant. On ASCII-ish machines, only ASCII characters
+fit this definition, hence the function's name.
+
+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
of the string C<d>; C<d> should be have at least C<UTF8_MAXBYTES+1> free
U8 *
Perl_uvuni_to_utf8_flags(pTHX_ U8 *d, UV uv, UV flags)
{
+ PERL_ARGS_ASSERT_UVUNI_TO_UTF8_FLAGS;
+
if (ckWARN(WARN_UTF8)) {
if (UNICODE_IS_SURROGATE(uv) &&
!(flags & UNICODE_ALLOW_SURROGATE))
!(flags & UNICODE_ALLOW_SUPER))
)
Perl_warner(aTHX_ packWARN(WARN_UTF8),
- "Unicode character 0x%04"UVxf" is illegal", uv);
+ "Unicode non-character 0x%04"UVxf" is illegal for interchange", uv);
}
if (UNI_IS_INVARIANT(uv)) {
*d++ = (U8)UTF_TO_NATIVE(uv);
=cut */
STATIC STRLEN
-S_is_utf8_char_slow(pTHX_ const U8 *s, const STRLEN len)
+S_is_utf8_char_slow(const U8 *s, const STRLEN len)
{
U8 u = *s;
STRLEN slen;
UV uv, ouv;
+ PERL_ARGS_ASSERT_IS_UTF8_CHAR_SLOW;
+
if (UTF8_IS_INVARIANT(u))
return 1;
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 A|STRLEN|is_utf8_char|const U8 *s
+=for apidoc is_utf8_char
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.
+character. Note that an INVARIANT (i.e. ASCII on non-EBCDIC machines)
+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)
+Perl_is_utf8_char(const U8 *s)
{
const STRLEN len = UTF8SKIP(s);
+
+ PERL_ARGS_ASSERT_IS_UTF8_CHAR;
#ifdef IS_UTF8_CHAR
if (IS_UTF8_CHAR_FAST(len))
return IS_UTF8_CHAR(s, len) ? len : 0;
return is_utf8_char_slow(s, len);
}
+
/*
-=for apidoc A|bool|is_utf8_string|const U8 *s|STRLEN len
+=for apidoc is_utf8_string
Returns true if first C<len> bytes of the given string form a valid
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;
- const U8* send;
- if (!len)
- len = strlen((const char *)s);
- send = s + len;
+ PERL_ARGS_ASSERT_IS_UTF8_STRING;
while (x < send) {
STRLEN c;
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;
+ c = 0;
+ }
+ else
+ c = is_utf8_char_slow(x, c);
#else
c = is_utf8_char(x);
#endif /* #ifdef IS_UTF8_CHAR */
/*
Implemented as a macro in utf8.h
-=for apidoc A|bool|is_utf8_string_loc|const U8 *s|STRLEN len|const U8 **ep
+=for apidoc is_utf8_string_loc
Like is_utf8_string() but stores the location of the failure (in the
case of "utf8ness failure") or the location s+len (in the case of
See also is_utf8_string_loclen() and is_utf8_string().
-=for apidoc A|bool|is_utf8_string_loclen|const U8 *s|STRLEN len|const U8 **ep|const STRLEN *el
+=for apidoc is_utf8_string_loclen
Like is_utf8_string() but stores the location of the failure (in the
case of "utf8ness failure") or the location s+len (in the case of
*/
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;
- const U8* send;
STRLEN c;
+ STRLEN outlen = 0;
- if (!len)
- len = strlen((const char *)s);
- send = s + len;
- if (el)
- *el = 0;
+ PERL_ARGS_ASSERT_IS_UTF8_STRING_LOCLEN;
while (x < send) {
/* Inline the easy bits of is_utf8_char() here for speed... */
goto out;
}
x += c;
- if (el)
- (*el)++;
+ outlen++;
}
out:
+ if (el)
+ *el = outlen;
+
if (ep)
*ep = x;
- if (x != send)
- return FALSE;
-
- return TRUE;
+ return (x == send);
}
/*
-=for apidoc A|UV|utf8n_to_uvuni|const U8 *s|STRLEN curlen|STRLEN *retlen|U32 flags
+=for apidoc utf8n_to_uvuni
Bottom level UTF-8 decode routine.
-Returns the unicode code point value of the first character in the string C<s>
+Returns the Unicode code point value of the first character in the string C<s>
which is assumed to be in UTF-8 encoding and no longer than C<curlen>;
C<retlen> will be set to the length, in bytes, of that character.
UV
Perl_utf8n_to_uvuni(pTHX_ const U8 *s, STRLEN curlen, STRLEN *retlen, U32 flags)
{
- const U8 *s0 = s;
+ dVAR;
+ const U8 * const s0 = s;
UV uv = *s, ouv = 0;
STRLEN len = 1;
const bool dowarn = ckWARN_d(WARN_UTF8);
const UV startbyte = *s;
STRLEN expectlen = 0;
U32 warning = 0;
+ SV* sv;
+
+ PERL_ARGS_ASSERT_UTF8N_TO_UVUNI;
-/* This list is a superset of the UTF8_ALLOW_XXX. */
+/* This list is a superset of the UTF8_ALLOW_XXX. BUT it isn't, eg SUPER missing XXX */
#define UTF8_WARN_EMPTY 1
#define UTF8_WARN_CONTINUATION 2
if (flags & UTF8_CHECK_ONLY) {
if (retlen)
- *retlen = -1;
+ *retlen = ((STRLEN) -1);
return 0;
}
if (dowarn) {
- SV* const sv = sv_2mortal(newSVpv("Malformed UTF-8 character ", 0));
-
- switch (warning) {
- case 0: /* Intentionally empty. */ break;
- case UTF8_WARN_EMPTY:
- Perl_sv_catpv(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 {
- const int len = (int)(s-s0);
- 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], len, len > 1 ? "s" : "", startbyte, (int)expectlen);
+ if (warning == UTF8_WARN_FFFF) {
+ sv = newSVpvs_flags("Unicode non-character ", SVs_TEMP);
+ Perl_sv_catpvf(aTHX_ sv, "0x%04"UVxf" is illegal for interchange", uv);
+ }
+ else {
+ sv = newSVpvs_flags("Malformed UTF-8 character ", SVs_TEMP);
+
+ switch (warning) {
+ case 0: /* Intentionally empty. */ break;
+ case UTF8_WARN_EMPTY:
+ sv_catpvs(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 {
+ const int len = (int)(s-s0);
+ 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], len, len > 1 ? "s" : "", startbyte, (int)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")",
+ (int)curlen, curlen == 1 ? "" : "s", (int)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_LONG:
+ Perl_sv_catpvf(aTHX_ sv, "(%d byte%s, need %d, after start byte 0x%02"UVxf")",
+ (int)expectlen, expectlen == 1 ? "": "s", UNISKIP(uv), startbyte);
+ break;
+ default:
+ sv_catpvs(sv, "(unknown reason)");
+ break;
}
-
- 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")",
- (int)curlen, curlen == 1 ? "" : "s", (int)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_LONG:
- Perl_sv_catpvf(aTHX_ sv, "(%d byte%s, need %d, after start byte 0x%02"UVxf")",
- (int)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_catpv(aTHX_ sv, "(unknown reason)");
- break;
}
if (warning) {
}
/*
-=for apidoc A|UV|utf8_to_uvchr|const U8 *s|STRLEN *retlen
+=for apidoc utf8_to_uvchr
Returns the native character value of the first character in the string C<s>
which is assumed to be in UTF-8 encoding; C<retlen> will be set to the
UV
Perl_utf8_to_uvchr(pTHX_ const U8 *s, STRLEN *retlen)
{
- return Perl_utf8n_to_uvchr(aTHX_ s, UTF8_MAXBYTES, retlen,
- ckWARN(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY);
+ PERL_ARGS_ASSERT_UTF8_TO_UVCHR;
+
+ return utf8n_to_uvchr(s, UTF8_MAXBYTES, retlen,
+ ckWARN(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY);
}
/*
-=for apidoc A|UV|utf8_to_uvuni|const U8 *s|STRLEN *retlen
+=for apidoc utf8_to_uvuni
Returns the Unicode code point of the first character in the string C<s>
which is assumed to be in UTF-8 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
+This function should only be used when the returned UV is considered
an index into the Unicode semantic tables (e.g. swashes).
If C<s> does not point to a well-formed UTF-8 character, zero is
UV
Perl_utf8_to_uvuni(pTHX_ const U8 *s, STRLEN *retlen)
{
+ PERL_ARGS_ASSERT_UTF8_TO_UVUNI;
+
/* Call the low level routine asking for checks */
return Perl_utf8n_to_uvuni(aTHX_ s, UTF8_MAXBYTES, retlen,
ckWARN(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY);
}
/*
-=for apidoc A|STRLEN|utf8_length|const U8 *s|const U8 *e
+=for apidoc utf8_length
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_ const U8 *s, const U8 *e)
{
+ dVAR;
STRLEN len = 0;
+ PERL_ARGS_ASSERT_UTF8_LENGTH;
+
/* Note: cannot use UTF8_IS_...() too eagerly here since e.g.
* the bitops (especially ~) can create illegal UTF-8.
* In other words: in Perl UTF-8 is not just for Unicode. */
if (e < s)
goto warn_and_return;
while (s < e) {
- const U8 t = UTF8SKIP(s);
- if (e - s < t) {
- warn_and_return:
- if (ckWARN_d(WARN_UTF8)) {
- if (PL_op)
- Perl_warner(aTHX_ packWARN(WARN_UTF8),
- "%s in %s", unees, OP_DESC(PL_op));
- else
- Perl_warner(aTHX_ packWARN(WARN_UTF8), unees);
- }
- return len;
- }
- s += t;
+ if (!UTF8_IS_INVARIANT(*s))
+ s += UTF8SKIP(s);
+ else
+ s++;
len++;
}
+ if (e != s) {
+ len--;
+ warn_and_return:
+ if (PL_op)
+ Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8),
+ "%s in %s", unees, OP_DESC(PL_op));
+ else
+ Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), unees);
+ }
+
return len;
}
/*
-=for apidoc A|IV|utf8_distance|const U8 *a|const U8 *b
+=for apidoc utf8_distance
Returns the number of UTF-8 characters between the UTF-8 pointers C<a>
and C<b>.
IV
Perl_utf8_distance(pTHX_ const U8 *a, const U8 *b)
{
- IV off = 0;
+ PERL_ARGS_ASSERT_UTF8_DISTANCE;
- /* Note: cannot use UTF8_IS_...() too eagerly here since e.g.
- * the bitops (especially ~) can create illegal UTF-8.
- * In other words: in Perl UTF-8 is not just for Unicode. */
-
- if (a < b) {
- while (a < b) {
- const U8 c = UTF8SKIP(a);
- if (b - a < c)
- goto warn_and_return;
- a += c;
- off--;
- }
- }
- else {
- while (b < a) {
- const U8 c = UTF8SKIP(b);
-
- if (a - b < c) {
- warn_and_return:
- if (ckWARN_d(WARN_UTF8)) {
- if (PL_op)
- Perl_warner(aTHX_ packWARN(WARN_UTF8),
- "%s in %s", unees, OP_DESC(PL_op));
- else
- Perl_warner(aTHX_ packWARN(WARN_UTF8), unees);
- }
- return off;
- }
- b += c;
- off++;
- }
- }
-
- return off;
+ return (a < b) ? -1 * (IV) utf8_length(a, b) : (IV) utf8_length(b, a);
}
/*
-=for apidoc A|U8 *|utf8_hop|U8 *s|I32 off
+=for apidoc utf8_hop
Return the UTF-8 pointer C<s> displaced by C<off> characters, either
forward or backward.
U8 *
Perl_utf8_hop(pTHX_ const U8 *s, I32 off)
{
+ PERL_ARGS_ASSERT_UTF8_HOP;
+
+ PERL_UNUSED_CONTEXT;
/* Note: cannot use UTF8_IS_...() too eagerly here since e.g
* the bitops (especially ~) can create illegal UTF-8.
* In other words: in Perl UTF-8 is not just for Unicode. */
}
/*
-=for apidoc A|U8 *|utf8_to_bytes|U8 *s|STRLEN *len
+=for apidoc utf8_to_bytes
-Converts a string C<s> of length C<len> from UTF-8 into byte encoding.
+Converts a string C<s> of length C<len> from UTF-8 into native byte encoding.
Unlike C<bytes_to_utf8>, this over-writes the original string, and
updates len to contain the new length.
Returns zero on failure, setting C<len> to -1.
+If you need a copy of the string, see C<bytes_from_utf8>.
+
=cut
*/
U8 *
Perl_utf8_to_bytes(pTHX_ U8 *s, STRLEN *len)
{
- U8 *send;
+ U8 * const save = s;
+ U8 * const send = s + *len;
U8 *d;
- U8 *save = s;
+
+ PERL_ARGS_ASSERT_UTF8_TO_BYTES;
/* ensure valid UTF-8 and chars < 256 before updating string */
- for (send = s + *len; s < send; ) {
+ while (s < send) {
U8 c = *s++;
if (!UTF8_IS_INVARIANT(c) &&
(!UTF8_IS_DOWNGRADEABLE_START(c) || (s >= send)
|| !(c = *s++) || !UTF8_IS_CONTINUATION(c))) {
- *len = -1;
+ *len = ((STRLEN) -1);
return 0;
}
}
}
/*
-=for apidoc A|U8 *|bytes_from_utf8|const U8 *s|STRLEN *len|bool *is_utf8
+=for apidoc bytes_from_utf8
-Converts a string C<s> of length C<len> from UTF-8 into byte encoding.
+Converts a string C<s> of length C<len> from UTF-8 into native byte encoding.
Unlike C<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.
+0 if C<s> is converted or consisted entirely of characters that are invariant
+in utf8 (i.e., US-ASCII on non-EBCDIC machines).
=cut
*/
const U8 *send;
I32 count = 0;
+ PERL_ARGS_ASSERT_BYTES_FROM_UTF8;
+
+ PERL_UNUSED_CONTEXT;
if (!*is_utf8)
return (U8 *)start;
}
}
- *is_utf8 = 0;
+ *is_utf8 = FALSE;
- Newxz(d, (*len) - count + 1, U8);
+ Newx(d, (*len) - count + 1, U8);
s = start; start = d;
while (s < send) {
U8 c = *s++;
}
/*
-=for apidoc A|U8 *|bytes_to_utf8|const U8 *s|STRLEN *len
+=for apidoc bytes_to_utf8
-Converts a string C<s> of length C<len> from ASCII into UTF-8 encoding.
+Converts a string C<s> of length C<len> from the native encoding into UTF-8.
Returns a pointer to the newly-created string, and sets C<len> to
reflect the new length.
-If you want to convert to UTF-8 from other encodings than ASCII,
+A NUL character will be written after the end of the string.
+
+If you want to convert to UTF-8 from encodings other than
+the native (Latin1 or EBCDIC),
see sv_recode_to_utf8().
=cut
U8 *d;
U8 *dst;
- Newxz(d, (*len) * 2 + 1, U8);
+ PERL_ARGS_ASSERT_BYTES_TO_UTF8;
+ PERL_UNUSED_CONTEXT;
+
+ Newx(d, (*len) * 2 + 1, U8);
dst = d;
while (s < send) {
U8* pend;
U8* dstart = d;
- if (bytelen == 1 && p[0] == 0) { /* Be understanding. */
- d[0] = 0;
- *newlen = 1;
- return d;
- }
+ PERL_ARGS_ASSERT_UTF16_TO_UTF8;
if (bytelen & 1)
- Perl_croak(aTHX_ "panic: utf16_to_utf8: odd bytelen %"UVf, (UV)bytelen);
+ Perl_croak(aTHX_ "panic: utf16_to_utf8: odd bytelen %"UVuf, (UV)bytelen);
pend = p + bytelen;
UV uv = (p[0] << 8) + p[1]; /* UTF-16BE */
p += 2;
if (uv < 0x80) {
+#ifdef EBCDIC
+ *d++ = UNI_TO_NATIVE(uv);
+#else
*d++ = (U8)uv;
+#endif
continue;
}
if (uv < 0x800) {
*d++ = (U8)(( uv & 0x3f) | 0x80);
continue;
}
- if (uv >= 0xd800 && uv < 0xdbff) { /* surrogates */
- UV low = (p[0] << 8) + p[1];
- p += 2;
- if (low < 0xdc00 || low >= 0xdfff)
+ if (uv >= 0xd800 && uv <= 0xdbff) { /* surrogates */
+ if (p >= pend) {
Perl_croak(aTHX_ "Malformed UTF-16 surrogate");
- uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000;
+ } else {
+ UV low = (p[0] << 8) + p[1];
+ p += 2;
+ if (low < 0xdc00 || low > 0xdfff)
+ Perl_croak(aTHX_ "Malformed UTF-16 surrogate");
+ uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000;
+ }
+ } else if (uv >= 0xdc00 && uv <= 0xdfff) {
+ Perl_croak(aTHX_ "Malformed UTF-16 surrogate");
}
if (uv < 0x10000) {
*d++ = (U8)(( uv >> 12) | 0xe0);
Perl_utf16_to_utf8_reversed(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen)
{
U8* s = (U8*)p;
- U8* send = s + bytelen;
+ U8* const send = s + bytelen;
+
+ PERL_ARGS_ASSERT_UTF16_TO_UTF8_REVERSED;
+
+ if (bytelen & 1)
+ Perl_croak(aTHX_ "panic: utf16_to_utf8_reversed: odd bytelen %"UVuf,
+ (UV)bytelen);
+
while (s < send) {
- U8 tmp = s[0];
+ const U8 tmp = s[0];
s[0] = s[1];
s[1] = tmp;
s += 2;
}
bool
-Perl_is_uni_alnumc(pTHX_ UV c)
-{
- U8 tmpbuf[UTF8_MAXBYTES+1];
- uvchr_to_utf8(tmpbuf, c);
- return is_utf8_alnumc(tmpbuf);
-}
-
-bool
Perl_is_uni_idfirst(pTHX_ UV c)
{
U8 tmpbuf[UTF8_MAXBYTES+1];
UV
Perl_to_uni_upper(pTHX_ UV c, U8* p, STRLEN *lenp)
{
+ PERL_ARGS_ASSERT_TO_UNI_UPPER;
+
uvchr_to_utf8(p, c);
return to_utf8_upper(p, p, lenp);
}
UV
Perl_to_uni_title(pTHX_ UV c, U8* p, STRLEN *lenp)
{
+ PERL_ARGS_ASSERT_TO_UNI_TITLE;
+
uvchr_to_utf8(p, c);
return to_utf8_title(p, p, lenp);
}
UV
Perl_to_uni_lower(pTHX_ UV c, U8* p, STRLEN *lenp)
{
+ PERL_ARGS_ASSERT_TO_UNI_LOWER;
+
uvchr_to_utf8(p, c);
return to_utf8_lower(p, p, lenp);
}
UV
Perl_to_uni_fold(pTHX_ UV c, U8* p, STRLEN *lenp)
{
+ PERL_ARGS_ASSERT_TO_UNI_FOLD;
+
uvchr_to_utf8(p, c);
return to_utf8_fold(p, p, lenp);
}
}
bool
-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_ UV c)
{
return is_uni_idfirst(c); /* XXX no locale support yet */
return (U32)to_uni_lower(c, tmpbuf, &len);
}
-bool
-S_is_utf8_common(pTHX_ const U8 const *p, SV **swash,
+static bool
+S_is_utf8_common(pTHX_ const U8 *const p, SV **swash,
const char *const swashname)
{
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_COMMON;
+
if (!is_utf8_char(p))
return FALSE;
if (!*swash)
- *swash = swash_init("utf8", swashname, &PL_sv_undef, 0, 0);
+ *swash = swash_init("utf8", swashname, &PL_sv_undef, 1, 0);
return swash_fetch(*swash, p, TRUE) != 0;
}
bool
Perl_is_utf8_alnum(pTHX_ const U8 *p)
{
- if (!is_utf8_char(p))
- return FALSE;
- if (!PL_utf8_alnum)
- /* NOTE: "IsWord", not "IsAlnum", since Alnum is a true
- * 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, TRUE) != 0;
-/* 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, TRUE) != 0;
-#endif
-}
+ dVAR;
-bool
-Perl_is_utf8_alnumc(pTHX_ const U8 *p)
-{
- if (!is_utf8_char(p))
- return FALSE;
- if (!PL_utf8_alnumc)
- PL_utf8_alnumc = swash_init("utf8", "IsAlnumC", &PL_sv_undef, 0, 0);
- return swash_fetch(PL_utf8_alnumc, p, TRUE) != 0;
-/* 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, TRUE) != 0;
-#endif
+ PERL_ARGS_ASSERT_IS_UTF8_ALNUM;
+
+ /* NOTE: "IsWord", not "IsAlnum", since Alnum is a true
+ * descendant of isalnum(3), in other words, it doesn't
+ * contain the '_'. --jhi */
+ return is_utf8_common(p, &PL_utf8_alnum, "IsWord");
}
bool
Perl_is_utf8_idfirst(pTHX_ const U8 *p) /* The naming is historical. */
{
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_IDFIRST;
+
if (*p == '_')
return TRUE;
/* is_utf8_idstart would be more logical. */
- return S_is_utf8_common(aTHX_ p, &PL_utf8_idstart, "IdStart");
+ return is_utf8_common(p, &PL_utf8_idstart, "IdStart");
}
bool
Perl_is_utf8_idcont(pTHX_ const U8 *p)
{
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_IDCONT;
+
if (*p == '_')
return TRUE;
- return S_is_utf8_common(aTHX_ p, &PL_utf8_idcont, "IdContinue");
+ return is_utf8_common(p, &PL_utf8_idcont, "IdContinue");
}
bool
Perl_is_utf8_alpha(pTHX_ const U8 *p)
{
- return S_is_utf8_common(aTHX_ p, &PL_utf8_alpha, "IsAlpha");
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_ALPHA;
+
+ return is_utf8_common(p, &PL_utf8_alpha, "IsAlpha");
}
bool
Perl_is_utf8_ascii(pTHX_ const U8 *p)
{
- return S_is_utf8_common(aTHX_ p, &PL_utf8_ascii, "IsAscii");
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_ASCII;
+
+ return is_utf8_common(p, &PL_utf8_ascii, "IsAscii");
}
bool
Perl_is_utf8_space(pTHX_ const U8 *p)
{
- return S_is_utf8_common(aTHX_ p, &PL_utf8_space, "IsSpacePerl");
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_SPACE;
+
+ return is_utf8_common(p, &PL_utf8_space, "IsSpacePerl");
+}
+
+bool
+Perl_is_utf8_perl_space(pTHX_ const U8 *p)
+{
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_PERL_SPACE;
+
+ return is_utf8_common(p, &PL_utf8_perl_space, "IsPerlSpace");
+}
+
+bool
+Perl_is_utf8_perl_word(pTHX_ const U8 *p)
+{
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_PERL_WORD;
+
+ return is_utf8_common(p, &PL_utf8_perl_word, "IsPerlWord");
}
bool
Perl_is_utf8_digit(pTHX_ const U8 *p)
{
- return S_is_utf8_common(aTHX_ p, &PL_utf8_digit, "IsDigit");
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_DIGIT;
+
+ return is_utf8_common(p, &PL_utf8_digit, "IsDigit");
+}
+
+bool
+Perl_is_utf8_posix_digit(pTHX_ const U8 *p)
+{
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_POSIX_DIGIT;
+
+ return is_utf8_common(p, &PL_utf8_posix_digit, "IsPosixDigit");
}
bool
Perl_is_utf8_upper(pTHX_ const U8 *p)
{
- return S_is_utf8_common(aTHX_ p, &PL_utf8_upper, "IsUppercase");
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_UPPER;
+
+ return is_utf8_common(p, &PL_utf8_upper, "IsUppercase");
}
bool
Perl_is_utf8_lower(pTHX_ const U8 *p)
{
- return S_is_utf8_common(aTHX_ p, &PL_utf8_lower, "IsLowercase");
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_LOWER;
+
+ return is_utf8_common(p, &PL_utf8_lower, "IsLowercase");
}
bool
Perl_is_utf8_cntrl(pTHX_ const U8 *p)
{
- return S_is_utf8_common(aTHX_ p, &PL_utf8_cntrl, "IsCntrl");
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_CNTRL;
+
+ return is_utf8_common(p, &PL_utf8_cntrl, "IsCntrl");
}
bool
Perl_is_utf8_graph(pTHX_ const U8 *p)
{
- return S_is_utf8_common(aTHX_ p, &PL_utf8_graph, "IsGraph");
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_GRAPH;
+
+ return is_utf8_common(p, &PL_utf8_graph, "IsGraph");
}
bool
Perl_is_utf8_print(pTHX_ const U8 *p)
{
- return S_is_utf8_common(aTHX_ p, &PL_utf8_print, "IsPrint");
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_PRINT;
+
+ return is_utf8_common(p, &PL_utf8_print, "IsPrint");
}
bool
Perl_is_utf8_punct(pTHX_ const U8 *p)
{
- return S_is_utf8_common(aTHX_ p, &PL_utf8_punct, "IsPunct");
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_PUNCT;
+
+ return is_utf8_common(p, &PL_utf8_punct, "IsPunct");
}
bool
Perl_is_utf8_xdigit(pTHX_ const U8 *p)
{
- return S_is_utf8_common(aTHX_ p, &PL_utf8_xdigit, "Isxdigit");
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_XDIGIT;
+
+ return is_utf8_common(p, &PL_utf8_xdigit, "IsXDigit");
}
bool
Perl_is_utf8_mark(pTHX_ const U8 *p)
{
- return S_is_utf8_common(aTHX_ p, &PL_utf8_mark, "IsM");
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_MARK;
+
+ return is_utf8_common(p, &PL_utf8_mark, "IsM");
+}
+
+bool
+Perl_is_utf8_X_begin(pTHX_ const U8 *p)
+{
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_X_BEGIN;
+
+ return is_utf8_common(p, &PL_utf8_X_begin, "_X_Begin");
+}
+
+bool
+Perl_is_utf8_X_extend(pTHX_ const U8 *p)
+{
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_X_EXTEND;
+
+ return is_utf8_common(p, &PL_utf8_X_extend, "_X_Extend");
+}
+
+bool
+Perl_is_utf8_X_prepend(pTHX_ const U8 *p)
+{
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_X_PREPEND;
+
+ return is_utf8_common(p, &PL_utf8_X_prepend, "GCB=Prepend");
+}
+
+bool
+Perl_is_utf8_X_non_hangul(pTHX_ const U8 *p)
+{
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_X_NON_HANGUL;
+
+ return is_utf8_common(p, &PL_utf8_X_non_hangul, "HST=Not_Applicable");
+}
+
+bool
+Perl_is_utf8_X_L(pTHX_ const U8 *p)
+{
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_X_L;
+
+ return is_utf8_common(p, &PL_utf8_X_L, "GCB=L");
+}
+
+bool
+Perl_is_utf8_X_LV(pTHX_ const U8 *p)
+{
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_X_LV;
+
+ return is_utf8_common(p, &PL_utf8_X_LV, "GCB=LV");
+}
+
+bool
+Perl_is_utf8_X_LVT(pTHX_ const U8 *p)
+{
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_X_LVT;
+
+ return is_utf8_common(p, &PL_utf8_X_LVT, "GCB=LVT");
+}
+
+bool
+Perl_is_utf8_X_T(pTHX_ const U8 *p)
+{
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_X_T;
+
+ return is_utf8_common(p, &PL_utf8_X_T, "GCB=T");
+}
+
+bool
+Perl_is_utf8_X_V(pTHX_ const U8 *p)
+{
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_X_V;
+
+ return is_utf8_common(p, &PL_utf8_X_V, "GCB=V");
+}
+
+bool
+Perl_is_utf8_X_LV_LVT_V(pTHX_ const U8 *p)
+{
+ dVAR;
+
+ PERL_ARGS_ASSERT_IS_UTF8_X_LV_LVT_V;
+
+ return is_utf8_common(p, &PL_utf8_X_LV_LVT_V, "_X_LV_LVT_V");
}
/*
-=for apidoc A|UV|to_utf8_case|U8 *p|U8* ustrp|STRLEN *lenp|SV **swash|char *normal|char *special
+=for apidoc to_utf8_case
The "p" contains the pointer to the UTF-8 string encoding
the character that is being converted.
The "swashp" is a pointer to the swash to use.
Both the special and normal mappings are stored lib/unicore/To/Foo.pl,
-and loaded by SWASHGET, using lib/utf8_heavy.pl. The special (usually,
+and loaded by SWASHNEW, using lib/utf8_heavy.pl. The special (usually,
but not always, a multicharacter mapping), is tried first.
The "special" is a string like "utf8::ToSpecLower", which means the
Perl_to_utf8_case(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp,
SV **swashp, const char *normal, const char *special)
{
+ dVAR;
U8 tmpbuf[UTF8_MAXBYTES_CASE+1];
STRLEN len = 0;
-
const UV uv0 = utf8_to_uvchr(p, NULL);
/* The NATIVE_TO_UNI() and UNI_TO_NATIVE() mappings
* are necessary in EBCDIC, they are redundant no-ops
* in ASCII-ish platforms, and hopefully optimized away. */
const UV uv1 = NATIVE_TO_UNI(uv0);
+
+ PERL_ARGS_ASSERT_TO_UTF8_CASE;
+
uvuni_to_utf8(tmpbuf, uv1);
if (!*swashp) /* load on-demand */
*swashp = swash_init("utf8", normal, &PL_sv_undef, 4, 0);
+ /* This is the beginnings of a skeleton of code to read the info section
+ * that is in all the swashes in case we ever want to do that, so one can
+ * read things whose maps aren't code points, and whose default if missing
+ * is not to the code point itself. This was just to see if it actually
+ * worked. Details on what the possibilities are are in perluniprops.pod
+ HV * const hv = get_hv("utf8::SwashInfo", 0);
+ if (hv) {
+ SV **svp;
+ svp = hv_fetch(hv, (const char*)normal, strlen(normal), FALSE);
+ const char *s;
+
+ HV * const this_hash = SvRV(*svp);
+ svp = hv_fetch(this_hash, "type", strlen("type"), FALSE);
+ s = SvPV_const(*svp, len);
+ }
+ }*/
- /* The 0xDF is the only special casing Unicode code point below 0x100. */
- if (special && (uv1 == 0xDF || uv1 > 0xFF)) {
+ if (special) {
/* It might be "special" (sometimes, but not always,
* a multicharacter mapping) */
- HV *hv;
+ HV * const hv = get_hv(special, 0);
SV **svp;
- if ((hv = get_hv(special, FALSE)) &&
+ if (hv &&
(svp = hv_fetch(hv, (const char*)tmpbuf, UNISKIP(uv1), FALSE)) &&
(*svp)) {
const char *s;
STRLEN tlen = 0;
while (t < tend) {
- UV c = utf8_to_uvchr(t, &tlen);
+ const UV c = utf8_to_uvchr(t, &tlen);
if (tlen > 0) {
d = uvchr_to_utf8(d, UNI_TO_NATIVE(c));
t += tlen;
}
if (!len && *swashp) {
- UV uv2 = swash_fetch(*swashp, tmpbuf, TRUE);
-
+ const UV uv2 = swash_fetch(*swashp, tmpbuf, TRUE);
+
if (uv2) {
/* It was "normal" (a single character mapping). */
- UV uv3 = UNI_TO_NATIVE(uv2);
-
+ const UV uv3 = UNI_TO_NATIVE(uv2);
len = uvchr_to_utf8(ustrp, uv3) - ustrp;
}
}
- if (!len) /* Neither: just copy. */
+ if (!len) /* Neither: just copy. In other words, there was no mapping
+ defined, which means that the code point maps to itself */
len = uvchr_to_utf8(ustrp, uv0) - ustrp;
if (lenp)
}
/*
-=for apidoc A|UV|to_utf8_upper|const U8 *p|U8 *ustrp|STRLEN *lenp
+=for apidoc to_utf8_upper
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
UV
Perl_to_utf8_upper(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp)
{
+ dVAR;
+
+ PERL_ARGS_ASSERT_TO_UTF8_UPPER;
+
return Perl_to_utf8_case(aTHX_ p, ustrp, lenp,
&PL_utf8_toupper, "ToUpper", "utf8::ToSpecUpper");
}
/*
-=for apidoc A|UV|to_utf8_title|const U8 *p|U8 *ustrp|STRLEN *lenp
+=for apidoc to_utf8_title
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
UV
Perl_to_utf8_title(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp)
{
+ dVAR;
+
+ PERL_ARGS_ASSERT_TO_UTF8_TITLE;
+
return Perl_to_utf8_case(aTHX_ p, ustrp, lenp,
&PL_utf8_totitle, "ToTitle", "utf8::ToSpecTitle");
}
/*
-=for apidoc A|UV|to_utf8_lower|const U8 *p|U8 *ustrp|STRLEN *lenp
+=for apidoc to_utf8_lower
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
UV
Perl_to_utf8_lower(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp)
{
+ dVAR;
+
+ PERL_ARGS_ASSERT_TO_UTF8_LOWER;
+
return Perl_to_utf8_case(aTHX_ p, ustrp, lenp,
&PL_utf8_tolower, "ToLower", "utf8::ToSpecLower");
}
/*
-=for apidoc A|UV|to_utf8_fold|const U8 *p|U8 *ustrp|STRLEN *lenp
+=for apidoc to_utf8_fold
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
UV
Perl_to_utf8_fold(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp)
{
+ dVAR;
+
+ PERL_ARGS_ASSERT_TO_UTF8_FOLD;
+
return Perl_to_utf8_case(aTHX_ p, ustrp, lenp,
&PL_utf8_tofold, "ToFold", "utf8::ToSpecFold");
}
-/* a "swash" is a swatch hash */
-
+/* Note:
+ * A "swash" is a swatch hash.
+ * A "swatch" is a bit vector generated by utf8.c:S_swash_get().
+ * C<pkg> is a pointer to a package name for SWASHNEW, should be "utf8".
+ * For other parameters, see utf8::SWASHNEW in lib/utf8_heavy.pl.
+ */
SV*
Perl_swash_init(pTHX_ const char* pkg, const char* name, SV *listsv, I32 minbits, I32 none)
{
dVAR;
SV* retval;
- SV* const tokenbufsv = sv_newmortal();
dSP;
const size_t pkg_len = strlen(pkg);
const size_t name_len = strlen(name);
- HV * const stash = gv_stashpvn(pkg, pkg_len, FALSE);
+ HV * const stash = gv_stashpvn(pkg, pkg_len, 0);
SV* errsv_save;
+ PERL_ARGS_ASSERT_SWASH_INIT;
+
PUSHSTACKi(PERLSI_MAGIC);
ENTER;
- SAVEI32(PL_hints);
- PL_hints = 0;
+ SAVEHINTS();
save_re_context();
if (!gv_fetchmeth(stash, "SWASHNEW", 8, -1)) { /* demand load utf8 */
ENTER;
errsv_save = newSVsv(ERRSV);
+ /* It is assumed that callers of this routine are not passing in any
+ user derived data. */
+ /* Need to do this after save_re_context() as it will set PL_tainted to
+ 1 while saving $1 etc (see the code after getrx: in Perl_magic_get).
+ Even line to create errsv_save can turn on PL_tainted. */
+ SAVEBOOL(PL_tainted);
+ PL_tainted = 0;
Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, newSVpvn(pkg,pkg_len),
- Nullsv);
+ NULL);
if (!SvTRUE(ERRSV))
sv_setsv(ERRSV, errsv_save);
SvREFCNT_dec(errsv_save);
SPAGAIN;
PUSHMARK(SP);
EXTEND(SP,5);
- PUSHs(sv_2mortal(newSVpvn(pkg, pkg_len)));
- PUSHs(sv_2mortal(newSVpvn(name, name_len)));
+ mPUSHp(pkg, pkg_len);
+ mPUSHp(name, name_len);
PUSHs(listsv);
- PUSHs(sv_2mortal(newSViv(minbits)));
- PUSHs(sv_2mortal(newSViv(none)));
+ mPUSHi(minbits);
+ mPUSHi(none);
PUTBACK;
- if (IN_PERL_COMPILETIME) {
- /* XXX ought to be handled by lex_start */
- SAVEI32(PL_in_my);
- PL_in_my = 0;
- sv_setpv(tokenbufsv, PL_tokenbuf);
- }
errsv_save = newSVsv(ERRSV);
if (call_method("SWASHNEW", G_SCALAR))
retval = newSVsv(*PL_stack_sp--);
LEAVE;
POPSTACK;
if (IN_PERL_COMPILETIME) {
- STRLEN len;
- const char* const pv = SvPV_const(tokenbufsv, len);
-
- Copy(pv, PL_tokenbuf, len+1, char);
- PL_curcop->op_private = (U8)(PL_hints & HINT_PRIVATE_MASK);
+ CopHINTS_set(PL_curcop, PL_hints);
}
if (!SvROK(retval) || SvTYPE(SvRV(retval)) != SVt_PVHV) {
if (SvPOK(retval))
Perl_croak(aTHX_ "Can't find Unicode property definition \"%"SVf"\"",
- retval);
+ SVfARG(retval));
Perl_croak(aTHX_ "SWASHNEW didn't return an HV ref");
}
return retval;
* (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 */
+/* Now SWASHGET is recasted into S_swash_get in this file. */
+
+/* Note:
+ * Returns the value of property/mapping C<swash> for the first character
+ * of the string C<ptr>. If C<do_utf8> is true, the string C<ptr> is
+ * assumed to be in utf8. If C<do_utf8> is false, the string C<ptr> is
+ * assumed to be in native 8-bit encoding. Caches the swatch in C<swash>.
+ */
UV
-Perl_swash_fetch(pTHX_ SV *sv, const U8 *ptr, bool do_utf8)
+Perl_swash_fetch(pTHX_ SV *swash, const U8 *ptr, bool do_utf8)
{
dVAR;
- HV* const hv = (HV*)SvRV(sv);
+ HV *const hv = MUTABLE_HV(SvRV(swash));
U32 klen;
U32 off;
STRLEN slen;
STRLEN needents;
const U8 *tmps = NULL;
U32 bit;
- SV *retval;
+ SV *swatch;
U8 tmputf8[2];
- UV c = NATIVE_TO_ASCII(*ptr);
+ const UV c = NATIVE_TO_ASCII(*ptr);
+
+ PERL_ARGS_ASSERT_SWASH_FETCH;
if (!do_utf8 && !UNI_IS_INVARIANT(c)) {
- tmputf8[0] = (U8)UTF8_EIGHT_BIT_HI(c);
- tmputf8[1] = (U8)UTF8_EIGHT_BIT_LO(c);
- ptr = tmputf8;
+ tmputf8[0] = (U8)UTF8_EIGHT_BIT_HI(c);
+ tmputf8[1] = (U8)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
+ * then the "swatch" is a vec() for all 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
+ if (klen == 0) {
+ /* If char is invariant then swatch is for all the invariant chars
* In both UTF-8 and UTF-8-MOD that happens to be UTF_CONTINUATION_MARK
*/
- needents = UTF_CONTINUATION_MARK;
- off = NATIVE_TO_UTF(ptr[klen]);
- }
- else
- {
+ 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;
- }
+ 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
/* Try our second-level swatch cache, kept in a hash. */
SV** svp = hv_fetch(hv, (const char*)ptr, klen, FALSE);
- /* If not cached, generate it via utf8::SWASHGET */
- if (!svp || !SvPOK(*svp) || !(tmps = (const U8*)SvPV_const(*svp, slen))) {
- dSP;
+ /* If not cached, generate it via swash_get */
+ if (!svp || !SvPOK(*svp)
+ || !(tmps = (const U8*)SvPV_const(*svp, slen))) {
/* We use utf8n_to_uvuni() as we want an index into
Unicode tables, not a native character number.
*/
const UV code_point = utf8n_to_uvuni(ptr, UTF8_MAXBYTES, 0,
ckWARN(WARN_UTF8) ?
0 : UTF8_ALLOW_ANY);
- SV *errsv_save;
- ENTER;
- SAVETMPS;
- save_re_context();
- PUSHSTACKi(PERLSI_MAGIC);
- PUSHMARK(SP);
- EXTEND(SP,3);
- PUSHs((SV*)sv);
- /* 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;
+ swatch = swash_get(swash,
+ /* On EBCDIC & ~(0xA0-1) isn't a useful thing to do */
+ (klen) ? (code_point & ~(needents - 1)) : 0,
+ needents);
+
if (IN_PERL_COMPILETIME)
- PL_curcop->op_private = (U8)(PL_hints & HINT_PRIVATE_MASK);
+ CopHINTS_set(PL_curcop, PL_hints);
- svp = hv_store(hv, (const char *)ptr, klen, retval, 0);
+ svp = hv_store(hv, (const char *)ptr, klen, swatch, 0);
- if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) || (slen << 3) < needents)
- Perl_croak(aTHX_ "SWASHGET didn't return result of proper length");
+ if (!svp || !(tmps = (U8*)SvPV(*svp, slen))
+ || (slen << 3) < needents)
+ Perl_croak(aTHX_ "panic: swash_fetch got improper swatch");
}
PL_last_swash_hv = hv;
- PL_last_swash_klen = klen;
+ assert(klen <= sizeof(PL_last_swash_key));
+ PL_last_swash_klen = (U8)klen;
/* FIXME change interpvar.h? */
PL_last_swash_tmps = (U8 *) tmps;
PL_last_swash_slen = slen;
off <<= 2;
return (tmps[off] << 24) + (tmps[off+1] << 16) + (tmps[off+2] << 8) + tmps[off + 3] ;
}
- Perl_croak(aTHX_ "panic: swash_fetch");
- return 0;
+ Perl_croak(aTHX_ "panic: swash_fetch got swatch of unexpected bit width");
+ NORETURN_FUNCTION_END;
+}
+
+/* Note:
+ * Returns a swatch (a bit vector string) for a code point sequence
+ * that starts from the value C<start> and comprises the number C<span>.
+ * A C<swash> must be an object created by SWASHNEW (see lib/utf8_heavy.pl).
+ * Should be used via swash_fetch, which will cache the swatch in C<swash>.
+ */
+STATIC SV*
+S_swash_get(pTHX_ SV* swash, UV start, UV span)
+{
+ SV *swatch;
+ U8 *l, *lend, *x, *xend, *s;
+ STRLEN lcur, xcur, scur;
+ HV *const hv = MUTABLE_HV(SvRV(swash));
+ SV** const listsvp = hv_fetchs(hv, "LIST", FALSE);
+ SV** const typesvp = hv_fetchs(hv, "TYPE", FALSE);
+ SV** const bitssvp = hv_fetchs(hv, "BITS", FALSE);
+ SV** const nonesvp = hv_fetchs(hv, "NONE", FALSE);
+ SV** const extssvp = hv_fetchs(hv, "EXTRAS", FALSE);
+ const U8* const typestr = (U8*)SvPV_nolen(*typesvp);
+ const int typeto = typestr[0] == 'T' && typestr[1] == 'o';
+ const STRLEN bits = SvUV(*bitssvp);
+ const STRLEN octets = bits >> 3; /* if bits == 1, then octets == 0 */
+ const UV none = SvUV(*nonesvp);
+ const UV end = start + span;
+
+ PERL_ARGS_ASSERT_SWASH_GET;
+
+ if (bits != 1 && bits != 8 && bits != 16 && bits != 32) {
+ Perl_croak(aTHX_ "panic: swash_get doesn't expect bits %"UVuf,
+ (UV)bits);
+ }
+
+ /* create and initialize $swatch */
+ scur = octets ? (span * octets) : (span + 7) / 8;
+ swatch = newSV(scur);
+ SvPOK_on(swatch);
+ s = (U8*)SvPVX(swatch);
+ if (octets && none) {
+ const U8* const e = s + scur;
+ while (s < e) {
+ if (bits == 8)
+ *s++ = (U8)(none & 0xff);
+ else if (bits == 16) {
+ *s++ = (U8)((none >> 8) & 0xff);
+ *s++ = (U8)( none & 0xff);
+ }
+ else if (bits == 32) {
+ *s++ = (U8)((none >> 24) & 0xff);
+ *s++ = (U8)((none >> 16) & 0xff);
+ *s++ = (U8)((none >> 8) & 0xff);
+ *s++ = (U8)( none & 0xff);
+ }
+ }
+ *s = '\0';
+ }
+ else {
+ (void)memzero((U8*)s, scur + 1);
+ }
+ SvCUR_set(swatch, scur);
+ s = (U8*)SvPVX(swatch);
+
+ /* read $swash->{LIST} */
+ l = (U8*)SvPV(*listsvp, lcur);
+ lend = l + lcur;
+ while (l < lend) {
+ UV min, max, val;
+ STRLEN numlen;
+ I32 flags = PERL_SCAN_SILENT_ILLDIGIT | PERL_SCAN_DISALLOW_PREFIX;
+
+ U8* const nl = (U8*)memchr(l, '\n', lend - l);
+
+ numlen = lend - l;
+ min = grok_hex((char *)l, &numlen, &flags, NULL);
+ if (numlen)
+ l += numlen;
+ else if (nl) {
+ l = nl + 1; /* 1 is length of "\n" */
+ continue;
+ }
+ else {
+ l = lend; /* to LIST's end at which \n is not found */
+ break;
+ }
+
+ if (isBLANK(*l)) {
+ ++l;
+ flags = PERL_SCAN_SILENT_ILLDIGIT | PERL_SCAN_DISALLOW_PREFIX;
+ numlen = lend - l;
+ max = grok_hex((char *)l, &numlen, &flags, NULL);
+ if (numlen)
+ l += numlen;
+ else
+ max = min;
+
+ if (octets) {
+ if (isBLANK(*l)) {
+ ++l;
+ flags = PERL_SCAN_SILENT_ILLDIGIT |
+ PERL_SCAN_DISALLOW_PREFIX;
+ numlen = lend - l;
+ val = grok_hex((char *)l, &numlen, &flags, NULL);
+ if (numlen)
+ l += numlen;
+ else
+ val = 0;
+ }
+ else {
+ val = 0;
+ if (typeto) {
+ Perl_croak(aTHX_ "%s: illegal mapping '%s'",
+ typestr, l);
+ }
+ }
+ }
+ else
+ val = 0; /* bits == 1, then val should be ignored */
+ }
+ else {
+ max = min;
+ if (octets) {
+ val = 0;
+ if (typeto) {
+ Perl_croak(aTHX_ "%s: illegal mapping '%s'", typestr, l);
+ }
+ }
+ else
+ val = 0; /* bits == 1, then val should be ignored */
+ }
+
+ if (nl)
+ l = nl + 1;
+ else
+ l = lend;
+
+ if (max < start)
+ continue;
+
+ if (octets) {
+ UV key;
+ if (min < start) {
+ if (!none || val < none) {
+ val += start - min;
+ }
+ min = start;
+ }
+ for (key = min; key <= max; key++) {
+ STRLEN offset;
+ if (key >= end)
+ goto go_out_list;
+ /* offset must be non-negative (start <= min <= key < end) */
+ offset = octets * (key - start);
+ if (bits == 8)
+ s[offset] = (U8)(val & 0xff);
+ else if (bits == 16) {
+ s[offset ] = (U8)((val >> 8) & 0xff);
+ s[offset + 1] = (U8)( val & 0xff);
+ }
+ else if (bits == 32) {
+ s[offset ] = (U8)((val >> 24) & 0xff);
+ s[offset + 1] = (U8)((val >> 16) & 0xff);
+ s[offset + 2] = (U8)((val >> 8) & 0xff);
+ s[offset + 3] = (U8)( val & 0xff);
+ }
+
+ if (!none || val < none)
+ ++val;
+ }
+ }
+ else { /* bits == 1, then val should be ignored */
+ UV key;
+ if (min < start)
+ min = start;
+ for (key = min; key <= max; key++) {
+ const STRLEN offset = (STRLEN)(key - start);
+ if (key >= end)
+ goto go_out_list;
+ s[offset >> 3] |= 1 << (offset & 7);
+ }
+ }
+ } /* while */
+ go_out_list:
+
+ /* read $swash->{EXTRAS} */
+ x = (U8*)SvPV(*extssvp, xcur);
+ xend = x + xcur;
+ while (x < xend) {
+ STRLEN namelen;
+ U8 *namestr;
+ SV** othersvp;
+ HV* otherhv;
+ STRLEN otherbits;
+ SV **otherbitssvp, *other;
+ U8 *s, *o, *nl;
+ STRLEN slen, olen;
+
+ const U8 opc = *x++;
+ if (opc == '\n')
+ continue;
+
+ nl = (U8*)memchr(x, '\n', xend - x);
+
+ if (opc != '-' && opc != '+' && opc != '!' && opc != '&') {
+ if (nl) {
+ x = nl + 1; /* 1 is length of "\n" */
+ continue;
+ }
+ else {
+ x = xend; /* to EXTRAS' end at which \n is not found */
+ break;
+ }
+ }
+
+ namestr = x;
+ if (nl) {
+ namelen = nl - namestr;
+ x = nl + 1;
+ }
+ else {
+ namelen = xend - namestr;
+ x = xend;
+ }
+
+ othersvp = hv_fetch(hv, (char *)namestr, namelen, FALSE);
+ otherhv = MUTABLE_HV(SvRV(*othersvp));
+ otherbitssvp = hv_fetchs(otherhv, "BITS", FALSE);
+ otherbits = (STRLEN)SvUV(*otherbitssvp);
+ if (bits < otherbits)
+ Perl_croak(aTHX_ "panic: swash_get found swatch size mismatch");
+
+ /* The "other" swatch must be destroyed after. */
+ other = swash_get(*othersvp, start, span);
+ o = (U8*)SvPV(other, olen);
+
+ if (!olen)
+ Perl_croak(aTHX_ "panic: swash_get got improper swatch");
+
+ s = (U8*)SvPV(swatch, slen);
+ if (bits == 1 && otherbits == 1) {
+ if (slen != olen)
+ Perl_croak(aTHX_ "panic: swash_get found swatch length mismatch");
+
+ switch (opc) {
+ case '+':
+ while (slen--)
+ *s++ |= *o++;
+ break;
+ case '!':
+ while (slen--)
+ *s++ |= ~*o++;
+ break;
+ case '-':
+ while (slen--)
+ *s++ &= ~*o++;
+ break;
+ case '&':
+ while (slen--)
+ *s++ &= *o++;
+ break;
+ default:
+ break;
+ }
+ }
+ else {
+ STRLEN otheroctets = otherbits >> 3;
+ STRLEN offset = 0;
+ U8* const send = s + slen;
+
+ while (s < send) {
+ UV otherval = 0;
+
+ if (otherbits == 1) {
+ otherval = (o[offset >> 3] >> (offset & 7)) & 1;
+ ++offset;
+ }
+ else {
+ STRLEN vlen = otheroctets;
+ otherval = *o++;
+ while (--vlen) {
+ otherval <<= 8;
+ otherval |= *o++;
+ }
+ }
+
+ if (opc == '+' && otherval)
+ NOOP; /* replace with otherval */
+ else if (opc == '!' && !otherval)
+ otherval = 1;
+ else if (opc == '-' && otherval)
+ otherval = 0;
+ else if (opc == '&' && !otherval)
+ otherval = 0;
+ else {
+ s += octets; /* no replacement */
+ continue;
+ }
+
+ if (bits == 8)
+ *s++ = (U8)( otherval & 0xff);
+ else if (bits == 16) {
+ *s++ = (U8)((otherval >> 8) & 0xff);
+ *s++ = (U8)( otherval & 0xff);
+ }
+ else if (bits == 32) {
+ *s++ = (U8)((otherval >> 24) & 0xff);
+ *s++ = (U8)((otherval >> 16) & 0xff);
+ *s++ = (U8)((otherval >> 8) & 0xff);
+ *s++ = (U8)( otherval & 0xff);
+ }
+ }
+ }
+ sv_free(other); /* through with it! */
+ } /* while */
+ return swatch;
+}
+
+/*
+=for apidoc uvchr_to_utf8
+
+Adds the UTF-8 representation of the Native codepoint C<uv> to the end
+of the string C<d>; C<d> should be have at least C<UTF8_MAXBYTES+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
+*/
+U8 *
+Perl_uvchr_to_utf8(pTHX_ U8 *d, UV uv)
+{
+ PERL_ARGS_ASSERT_UVCHR_TO_UTF8;
+
+ 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)
{
+ PERL_ARGS_ASSERT_UVCHR_TO_UTF8_FLAGS;
+
return Perl_uvuni_to_utf8_flags(aTHX_ d, NATIVE_TO_UNI(uv), flags);
}
/*
-=for apidoc A|char *|pv_uni_display|SV *dsv|U8 *spv|STRLEN len|STRLEN pvlim|UV flags
+=for apidoc utf8n_to_uvchr
+flags
+
+Returns the native character value of the first character in the string
+C<s>
+which is assumed to be in UTF-8 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
+*/
+UV
+Perl_utf8n_to_uvchr(pTHX_ const U8 *s, STRLEN curlen, STRLEN *retlen,
+U32 flags)
+{
+ const UV uv = Perl_utf8n_to_uvuni(aTHX_ s, curlen, retlen, flags);
+
+ PERL_ARGS_ASSERT_UTF8N_TO_UVCHR;
+
+ return UNI_TO_NATIVE(uv);
+}
+
+/*
+=for apidoc pv_uni_display
Build to the scalar dsv a displayable version of the string spv,
length len, the displayable version being at most pvlim bytes long
int truncated = 0;
const char *s, *e;
- sv_setpvn(dsv, "", 0);
+ PERL_ARGS_ASSERT_PV_UNI_DISPLAY;
+
+ sv_setpvs(dsv, "");
+ SvUTF8_off(dsv);
for (s = (const char *)spv, e = s + len; s < e; s += UTF8SKIP(s)) {
UV u;
/* This serves double duty as a flag and a character to print after
u = utf8_to_uvchr((U8*)s, 0);
if (u < 256) {
const unsigned char c = (unsigned char)u & 0xFF;
- if (!ok && (flags & UNI_DISPLAY_BACKSLASH)) {
+ if (flags & UNI_DISPLAY_BACKSLASH) {
switch (c) {
case '\n':
ok = 'n'; break;
default: break;
}
if (ok) {
- Perl_sv_catpvf(aTHX_ dsv, "\\%c", ok);
+ const char string = ok;
+ sv_catpvs(dsv, "\\");
+ sv_catpvn(dsv, &string, 1);
}
}
/* isPRINT() is the locale-blind version. */
if (!ok && (flags & UNI_DISPLAY_ISPRINT) && isPRINT(c)) {
- Perl_sv_catpvf(aTHX_ dsv, "%c", c);
+ const char string = c;
+ sv_catpvn(dsv, &string, 1);
ok = 1;
}
}
Perl_sv_catpvf(aTHX_ dsv, "\\x{%"UVxf"}", u);
}
if (truncated)
- sv_catpvn(dsv, "...", 3);
-
+ sv_catpvs(dsv, "...");
+
return SvPVX(dsv);
}
/*
-=for apidoc A|char *|sv_uni_display|SV *dsv|SV *ssv|STRLEN pvlim|UV flags
+=for apidoc sv_uni_display
Build to the scalar dsv a displayable version of the scalar sv,
the displayable version being at most pvlim bytes long
The pointer to the PV of the dsv is returned.
-=cut */
+=cut
+*/
char *
Perl_sv_uni_display(pTHX_ SV *dsv, SV *ssv, STRLEN pvlim, UV flags)
{
+ PERL_ARGS_ASSERT_SV_UNI_DISPLAY;
+
return Perl_pv_uni_display(aTHX_ dsv, (const U8*)SvPVX_const(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
-circumstances. 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 apidoc foldEQ_utf8
+
+Returns true if the leading portions of the strings s1 and s2 (either or both
+of which may be in UTF-8) are the same case-insensitively; false otherwise.
+How far into the strings to compare is determined by other input parameters.
+
+If u1 is true, the string s1 is assumed to be in UTF-8-encoded Unicode;
+otherwise it is assumed to be in native 8-bit encoding. Correspondingly for u2
+with respect to s2.
+
+If the byte length l1 is non-zero, it says how far into s1 to check for fold
+equality. In other words, s1+l1 will be used as a goal to reach. The
+scan will not be considered to be a match unless the goal is reached, and
+scanning won't continue past that goal. Correspondingly for l2 with respect to
+s2.
+
+If pe1 is non-NULL and the pointer it points to is not NULL, that pointer is
+considered an end pointer beyond which scanning of s1 will not continue under
+any circumstances. This means that if both l1 and pe1 are specified, and pe1
+is less than s1+l1, the match will never be successful because it can never
+get as far as its goal (and in fact is asserted against). Correspondingly for
+pe2 with respect to s2.
+
+At least one of s1 and s2 must have a goal (at least one of l1 and l2 must be
+non-zero), and if both do, both have to be
+reached for a successful match. Also, if the fold of a character is multiple
+characters, all of them must be matched (see tr21 reference below for
+'folding').
+
+Upon a successful match, if pe1 is non-NULL,
+it will be set to point to the beginning of the I<next> character of s1 beyond
+what was matched. Correspondingly for pe2 and s2.
For case-insensitiveness, the "casefolding" of Unicode is used
instead of upper/lowercasing both the characters, see
=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 const U8 *p1 = (const U8*)s1;
- register const U8 *p2 = (const U8*)s2;
- register const U8 *f1 = 0, *f2 = 0;
- register U8 *e1 = 0, *q1 = 0;
- register U8 *e2 = 0, *q2 = 0;
- STRLEN n1 = 0, n2 = 0;
- U8 foldbuf1[UTF8_MAXBYTES_CASE+1];
- U8 foldbuf2[UTF8_MAXBYTES_CASE+1];
- U8 natbuf[1+1];
- STRLEN foldlen1, foldlen2;
- bool match;
-
- if (pe1)
- e1 = *(U8**)pe1;
- if (e1 == 0 || (l1 && l1 < (UV)(e1 - (const U8*)s1)))
- f1 = (const U8*)s1 + l1;
- if (pe2)
- e2 = *(U8**)pe2;
- if (e2 == 0 || (l2 && l2 < (UV)(e2 - (const U8*)s2)))
- f2 = (const 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 */
-
- if (!u1 || !u2)
- natbuf[1] = 0; /* Need to terminate the buffer. */
-
- 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 {
- uvuni_to_utf8(natbuf, (UV) NATIVE_TO_UNI(((UV)*p1)));
- to_utf8_fold(natbuf, foldbuf1, &foldlen1);
- }
- q1 = foldbuf1;
- n1 = foldlen1;
- }
- if (n2 == 0) {
- if (u2)
- to_utf8_fold(p2, foldbuf2, &foldlen2);
- else {
- uvuni_to_utf8(natbuf, (UV) NATIVE_TO_UNI(((UV)*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 */
+Perl_foldEQ_utf8(pTHX_ const char *s1, char **pe1, register UV l1, bool u1, const char *s2, char **pe2, register UV l2, bool u2)
+{
+ dVAR;
+ register const U8 *p1 = (const U8*)s1; /* Point to current char */
+ register const U8 *p2 = (const U8*)s2;
+ register const U8 *g1 = NULL; /* goal for s1 */
+ register const U8 *g2 = NULL;
+ register const U8 *e1 = NULL; /* Don't scan s1 past this */
+ register U8 *f1 = NULL; /* Point to current folded */
+ register const U8 *e2 = NULL;
+ register U8 *f2 = NULL;
+ STRLEN n1 = 0, n2 = 0; /* Number of bytes in current char */
+ U8 foldbuf1[UTF8_MAXBYTES_CASE+1];
+ U8 foldbuf2[UTF8_MAXBYTES_CASE+1];
+ U8 natbuf[2]; /* Holds native 8-bit char converted to utf8;
+ these always fit in 2 bytes */
+
+ PERL_ARGS_ASSERT_FOLDEQ_UTF8;
+
+ if (pe1) {
+ e1 = *(U8**)pe1;
+ }
+
+ if (l1) {
+ g1 = (const U8*)s1 + l1;
+ }
+
+ if (pe2) {
+ e2 = *(U8**)pe2;
+ }
+
+ if (l2) {
+ g2 = (const U8*)s2 + l2;
+ }
+
+ /* Must have at least one goal */
+ assert(g1 || g2);
+
+ if (g1) {
+
+ /* Will never match if goal is out-of-bounds */
+ assert(! e1 || e1 >= g1);
+
+ /* Here, there isn't an end pointer, or it is beyond the goal. We
+ * only go as far as the goal */
+ e1 = g1;
+ }
+ else {
+ assert(e1); /* Must have an end for looking at s1 */
+ }
+
+ /* Same for goal for s2 */
+ if (g2) {
+ assert(! e2 || e2 >= g2);
+ e2 = g2;
+ }
+ else {
+ assert(e2);
+ }
+
+ /* Look through both strings, a character at a time */
+ while (p1 < e1 && p2 < e2) {
+
+ /* If at the beginning of a new character in s1, get its fold to use
+ * and the length of the fold */
+ if (n1 == 0) {
+ if (u1) {
+ to_utf8_fold(p1, foldbuf1, &n1);
+ }
+ else { /* Not utf8, convert to it first and then get fold */
+ uvuni_to_utf8(natbuf, (UV) NATIVE_TO_UNI(((UV)*p1)));
+ to_utf8_fold(natbuf, foldbuf1, &n1);
+ }
+ f1 = foldbuf1;
+ }
+
+ if (n2 == 0) { /* Same for s2 */
+ if (u2) {
+ to_utf8_fold(p2, foldbuf2, &n2);
+ }
+ else {
+ uvuni_to_utf8(natbuf, (UV) NATIVE_TO_UNI(((UV)*p2)));
+ to_utf8_fold(natbuf, foldbuf2, &n2);
+ }
+ f2 = foldbuf2;
+ }
+
+ /* While there is more to look for in both folds, see if they
+ * continue to match */
+ while (n1 && n2) {
+ U8 fold_length = UTF8SKIP(f1);
+ if (fold_length != UTF8SKIP(f2)
+ || (fold_length == 1 && *f1 != *f2) /* Short circuit memNE
+ function call for single
+ character */
+ || memNE((char*)f1, (char*)f2, fold_length))
+ {
+ return 0; /* mismatch */
+ }
+
+ /* Here, they matched, advance past them */
+ n1 -= fold_length;
+ f1 += fold_length;
+ n2 -= fold_length;
+ f2 += fold_length;
+ }
+
+ /* When reach the end of any fold, advance the input past it */
+ if (n1 == 0) {
+ p1 += u1 ? UTF8SKIP(p1) : 1;
+ }
+ if (n2 == 0) {
+ p2 += u2 ? UTF8SKIP(p2) : 1;
+ }
+ } /* End of loop through both strings */
+
+ /* A match is defined by each scan that specified an explicit length
+ * reaching its final goal, and the other not having matched a partial
+ * character (which can happen when the fold of a character is more than one
+ * character). */
+ if (! ((g1 == 0 || p1 == g1) && (g2 == 0 || p2 == g2)) || n1 || n2) {
+ return 0;
+ }
+
+ /* Successful match. Set output pointers */
+ if (pe1) {
+ *pe1 = (char*)p1;
+ }
+ if (pe2) {
+ *pe2 = (char*)p2;
+ }
+ return 1;
}
/*
https://perl5.git.perl.org / perl5.git / blobdiff