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-rw-r--r--gnu/usr.bin/perl/utf8.c856
1 files changed, 856 insertions, 0 deletions
diff --git a/gnu/usr.bin/perl/utf8.c b/gnu/usr.bin/perl/utf8.c
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index 00000000000..223f5ac6340
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+++ b/gnu/usr.bin/perl/utf8.c
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+/* utf8.c
+ *
+ * Copyright (c) 1998-2000, 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.
+ *
+ */
+
+/*
+ * '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.'
+ *
+ * '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?'
+ *
+ * ...the travellers perceived that the floor was paved with stones of many
+ * hues; branching runes and strange devices intertwined beneath their feet.
+ */
+
+#include "EXTERN.h"
+#define PERL_IN_UTF8_C
+#include "perl.h"
+
+/* Unicode support */
+
+U8 *
+Perl_uv_to_utf8(pTHX_ U8 *d, UV uv)
+{
+ if (uv < 0x80) {
+ *d++ = uv;
+ return d;
+ }
+ if (uv < 0x800) {
+ *d++ = (( uv >> 6) | 0xc0);
+ *d++ = (( uv & 0x3f) | 0x80);
+ return d;
+ }
+ if (uv < 0x10000) {
+ *d++ = (( uv >> 12) | 0xe0);
+ *d++ = (((uv >> 6) & 0x3f) | 0x80);
+ *d++ = (( uv & 0x3f) | 0x80);
+ return d;
+ }
+ if (uv < 0x200000) {
+ *d++ = (( uv >> 18) | 0xf0);
+ *d++ = (((uv >> 12) & 0x3f) | 0x80);
+ *d++ = (((uv >> 6) & 0x3f) | 0x80);
+ *d++ = (( uv & 0x3f) | 0x80);
+ return d;
+ }
+ if (uv < 0x4000000) {
+ *d++ = (( uv >> 24) | 0xf8);
+ *d++ = (((uv >> 18) & 0x3f) | 0x80);
+ *d++ = (((uv >> 12) & 0x3f) | 0x80);
+ *d++ = (((uv >> 6) & 0x3f) | 0x80);
+ *d++ = (( uv & 0x3f) | 0x80);
+ return d;
+ }
+ if (uv < 0x80000000) {
+ *d++ = (( uv >> 30) | 0xfc);
+ *d++ = (((uv >> 24) & 0x3f) | 0x80);
+ *d++ = (((uv >> 18) & 0x3f) | 0x80);
+ *d++ = (((uv >> 12) & 0x3f) | 0x80);
+ *d++ = (((uv >> 6) & 0x3f) | 0x80);
+ *d++ = (( uv & 0x3f) | 0x80);
+ return d;
+ }
+#ifdef HAS_QUAD
+ if (uv < 0x1000000000LL)
+#endif
+ {
+ *d++ = 0xfe; /* Can't match U+FEFF! */
+ *d++ = (((uv >> 30) & 0x3f) | 0x80);
+ *d++ = (((uv >> 24) & 0x3f) | 0x80);
+ *d++ = (((uv >> 18) & 0x3f) | 0x80);
+ *d++ = (((uv >> 12) & 0x3f) | 0x80);
+ *d++ = (((uv >> 6) & 0x3f) | 0x80);
+ *d++ = (( uv & 0x3f) | 0x80);
+ return d;
+ }
+#ifdef HAS_QUAD
+ {
+ *d++ = 0xff; /* Can't match U+FFFE! */
+ *d++ = 0x80; /* 6 Reserved bits */
+ *d++ = (((uv >> 60) & 0x0f) | 0x80); /* 2 Reserved bits */
+ *d++ = (((uv >> 54) & 0x3f) | 0x80);
+ *d++ = (((uv >> 48) & 0x3f) | 0x80);
+ *d++ = (((uv >> 42) & 0x3f) | 0x80);
+ *d++ = (((uv >> 36) & 0x3f) | 0x80);
+ *d++ = (((uv >> 30) & 0x3f) | 0x80);
+ *d++ = (((uv >> 24) & 0x3f) | 0x80);
+ *d++ = (((uv >> 18) & 0x3f) | 0x80);
+ *d++ = (((uv >> 12) & 0x3f) | 0x80);
+ *d++ = (((uv >> 6) & 0x3f) | 0x80);
+ *d++ = (( uv & 0x3f) | 0x80);
+ return d;
+ }
+#endif
+}
+
+/* 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. */
+int
+Perl_is_utf8_char(pTHX_ U8 *s)
+{
+ U8 u = *s;
+ int slen, len;
+
+ if (!(u & 0x80))
+ return 1;
+
+ if (!(u & 0x40))
+ return 0;
+
+ if (!(u & 0x20)) { len = 2; }
+ else if (!(u & 0x10)) { len = 3; }
+ else if (!(u & 0x08)) { len = 4; }
+ else if (!(u & 0x04)) { len = 5; }
+ else if (!(u & 0x02)) { len = 6; }
+ else if (!(u & 0x01)) { len = 7; }
+ else { len = 13; } /* whoa! */
+
+ slen = len - 1;
+ s++;
+ while (slen--) {
+ if ((*s & 0xc0) != 0x80)
+ return 0;
+ s++;
+ }
+ return len;
+}
+
+UV
+Perl_utf8_to_uv(pTHX_ U8* s, I32* retlen)
+{
+ UV uv = *s;
+ int len;
+ if (!(uv & 0x80)) {
+ if (retlen)
+ *retlen = 1;
+ return *s;
+ }
+ if (!(uv & 0x40)) {
+ dTHR;
+ if (ckWARN_d(WARN_UTF8))
+ Perl_warner(aTHX_ WARN_UTF8, "Malformed UTF-8 character");
+ if (retlen)
+ *retlen = 1;
+ return *s;
+ }
+
+ 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; }
+ else if (!(uv & 0x02)) { len = 6; uv &= 0x01; }
+ else if (!(uv & 0x01)) { len = 7; uv = 0; }
+ else { len = 13; uv = 0; } /* whoa! */
+
+ if (retlen)
+ *retlen = len;
+ --len;
+ s++;
+ while (len--) {
+ if ((*s & 0xc0) != 0x80) {
+ dTHR;
+ if (ckWARN_d(WARN_UTF8))
+ Perl_warner(aTHX_ WARN_UTF8, "Malformed UTF-8 character");
+ if (retlen)
+ *retlen -= len + 1;
+ return 0xfffd;
+ }
+ else
+ uv = (uv << 6) | (*s++ & 0x3f);
+ }
+ return uv;
+}
+
+/* utf8_distance(a,b) is intended to be a - b in pointer arithmetic */
+
+I32
+Perl_utf8_distance(pTHX_ U8 *a, U8 *b)
+{
+ I32 off = 0;
+ if (a < b) {
+ while (a < b) {
+ a += UTF8SKIP(a);
+ off--;
+ }
+ }
+ else {
+ while (b < a) {
+ b += UTF8SKIP(b);
+ off++;
+ }
+ }
+ return off;
+}
+
+/* WARNING: do not use the following unless you *know* off is within bounds */
+
+U8 *
+Perl_utf8_hop(pTHX_ U8 *s, I32 off)
+{
+ if (off >= 0) {
+ while (off--)
+ s += UTF8SKIP(s);
+ }
+ else {
+ while (off++) {
+ s--;
+ if (*s & 0x80) {
+ while ((*s & 0xc0) == 0x80)
+ s--;
+ }
+ }
+ }
+ return s;
+}
+
+/* XXX NOTHING CALLS THE FOLLOWING TWO ROUTINES YET!!! */
+/*
+ * Convert native or reversed UTF-16 to UTF-8.
+ *
+ * Destination must be pre-extended to 3/2 source. Do not use in-place.
+ * We optimize for native, for obvious reasons. */
+
+U8*
+Perl_utf16_to_utf8(pTHX_ U16* p, U8* d, I32 bytelen)
+{
+ U16* pend = p + bytelen / 2;
+ while (p < pend) {
+ UV uv = *p++;
+ if (uv < 0x80) {
+ *d++ = uv;
+ continue;
+ }
+ if (uv < 0x800) {
+ *d++ = (( uv >> 6) | 0xc0);
+ *d++ = (( uv & 0x3f) | 0x80);
+ continue;
+ }
+ if (uv >= 0xd800 && uv < 0xdbff) { /* surrogates */
+ dTHR;
+ int low = *p++;
+ if (low < 0xdc00 || low >= 0xdfff) {
+ if (ckWARN_d(WARN_UTF8))
+ Perl_warner(aTHX_ WARN_UTF8, "Malformed UTF-16 surrogate");
+ p--;
+ uv = 0xfffd;
+ }
+ uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000;
+ }
+ if (uv < 0x10000) {
+ *d++ = (( uv >> 12) | 0xe0);
+ *d++ = (((uv >> 6) & 0x3f) | 0x80);
+ *d++ = (( uv & 0x3f) | 0x80);
+ continue;
+ }
+ else {
+ *d++ = (( uv >> 18) | 0xf0);
+ *d++ = (((uv >> 12) & 0x3f) | 0x80);
+ *d++ = (((uv >> 6) & 0x3f) | 0x80);
+ *d++ = (( uv & 0x3f) | 0x80);
+ continue;
+ }
+ }
+ return d;
+}
+
+/* Note: this one is slightly destructive of the source. */
+
+U8*
+Perl_utf16_to_utf8_reversed(pTHX_ U16* p, U8* d, I32 bytelen)
+{
+ U8* s = (U8*)p;
+ U8* send = s + bytelen;
+ while (s < send) {
+ U8 tmp = s[0];
+ s[0] = s[1];
+ s[1] = tmp;
+ s += 2;
+ }
+ return utf16_to_utf8(p, d, bytelen);
+}
+
+/* for now these are all defined (inefficiently) in terms of the utf8 versions */
+
+bool
+Perl_is_uni_alnum(pTHX_ U32 c)
+{
+ U8 tmpbuf[UTF8_MAXLEN];
+ uv_to_utf8(tmpbuf, (UV)c);
+ return is_utf8_alnum(tmpbuf);
+}
+
+bool
+Perl_is_uni_alnumc(pTHX_ U32 c)
+{
+ U8 tmpbuf[UTF8_MAXLEN];
+ uv_to_utf8(tmpbuf, (UV)c);
+ return is_utf8_alnumc(tmpbuf);
+}
+
+bool
+Perl_is_uni_idfirst(pTHX_ U32 c)
+{
+ U8 tmpbuf[UTF8_MAXLEN];
+ uv_to_utf8(tmpbuf, (UV)c);
+ return is_utf8_idfirst(tmpbuf);
+}
+
+bool
+Perl_is_uni_alpha(pTHX_ U32 c)
+{
+ U8 tmpbuf[UTF8_MAXLEN];
+ uv_to_utf8(tmpbuf, (UV)c);
+ return is_utf8_alpha(tmpbuf);
+}
+
+bool
+Perl_is_uni_ascii(pTHX_ U32 c)
+{
+ U8 tmpbuf[UTF8_MAXLEN];
+ uv_to_utf8(tmpbuf, (UV)c);
+ return is_utf8_ascii(tmpbuf);
+}
+
+bool
+Perl_is_uni_space(pTHX_ U32 c)
+{
+ U8 tmpbuf[UTF8_MAXLEN];
+ uv_to_utf8(tmpbuf, (UV)c);
+ return is_utf8_space(tmpbuf);
+}
+
+bool
+Perl_is_uni_digit(pTHX_ U32 c)
+{
+ U8 tmpbuf[UTF8_MAXLEN];
+ uv_to_utf8(tmpbuf, (UV)c);
+ return is_utf8_digit(tmpbuf);
+}
+
+bool
+Perl_is_uni_upper(pTHX_ U32 c)
+{
+ U8 tmpbuf[UTF8_MAXLEN];
+ uv_to_utf8(tmpbuf, (UV)c);
+ return is_utf8_upper(tmpbuf);
+}
+
+bool
+Perl_is_uni_lower(pTHX_ U32 c)
+{
+ U8 tmpbuf[UTF8_MAXLEN];
+ uv_to_utf8(tmpbuf, (UV)c);
+ return is_utf8_lower(tmpbuf);
+}
+
+bool
+Perl_is_uni_cntrl(pTHX_ U32 c)
+{
+ U8 tmpbuf[UTF8_MAXLEN];
+ uv_to_utf8(tmpbuf, (UV)c);
+ return is_utf8_cntrl(tmpbuf);
+}
+
+bool
+Perl_is_uni_graph(pTHX_ U32 c)
+{
+ U8 tmpbuf[UTF8_MAXLEN];
+ uv_to_utf8(tmpbuf, (UV)c);
+ return is_utf8_graph(tmpbuf);
+}
+
+bool
+Perl_is_uni_print(pTHX_ U32 c)
+{
+ U8 tmpbuf[UTF8_MAXLEN];
+ uv_to_utf8(tmpbuf, (UV)c);
+ return is_utf8_print(tmpbuf);
+}
+
+bool
+Perl_is_uni_punct(pTHX_ U32 c)
+{
+ U8 tmpbuf[UTF8_MAXLEN];
+ uv_to_utf8(tmpbuf, (UV)c);
+ return is_utf8_punct(tmpbuf);
+}
+
+bool
+Perl_is_uni_xdigit(pTHX_ U32 c)
+{
+ U8 tmpbuf[UTF8_MAXLEN];
+ uv_to_utf8(tmpbuf, (UV)c);
+ return is_utf8_xdigit(tmpbuf);
+}
+
+U32
+Perl_to_uni_upper(pTHX_ U32 c)
+{
+ U8 tmpbuf[UTF8_MAXLEN];
+ uv_to_utf8(tmpbuf, (UV)c);
+ return to_utf8_upper(tmpbuf);
+}
+
+U32
+Perl_to_uni_title(pTHX_ U32 c)
+{
+ U8 tmpbuf[UTF8_MAXLEN];
+ uv_to_utf8(tmpbuf, (UV)c);
+ return to_utf8_title(tmpbuf);
+}
+
+U32
+Perl_to_uni_lower(pTHX_ U32 c)
+{
+ U8 tmpbuf[UTF8_MAXLEN];
+ uv_to_utf8(tmpbuf, (UV)c);
+ return to_utf8_lower(tmpbuf);
+}
+
+/* for now these all assume no locale info available for Unicode > 255 */
+
+bool
+Perl_is_uni_alnum_lc(pTHX_ U32 c)
+{
+ return is_uni_alnum(c); /* XXX no locale support yet */
+}
+
+bool
+Perl_is_uni_alnumc_lc(pTHX_ U32 c)
+{
+ return is_uni_alnumc(c); /* XXX no locale support yet */
+}
+
+bool
+Perl_is_uni_idfirst_lc(pTHX_ U32 c)
+{
+ return is_uni_idfirst(c); /* XXX no locale support yet */
+}
+
+bool
+Perl_is_uni_alpha_lc(pTHX_ U32 c)
+{
+ return is_uni_alpha(c); /* XXX no locale support yet */
+}
+
+bool
+Perl_is_uni_ascii_lc(pTHX_ U32 c)
+{
+ return is_uni_ascii(c); /* XXX no locale support yet */
+}
+
+bool
+Perl_is_uni_space_lc(pTHX_ U32 c)
+{
+ return is_uni_space(c); /* XXX no locale support yet */
+}
+
+bool
+Perl_is_uni_digit_lc(pTHX_ U32 c)
+{
+ return is_uni_digit(c); /* XXX no locale support yet */
+}
+
+bool
+Perl_is_uni_upper_lc(pTHX_ U32 c)
+{
+ return is_uni_upper(c); /* XXX no locale support yet */
+}
+
+bool
+Perl_is_uni_lower_lc(pTHX_ U32 c)
+{
+ return is_uni_lower(c); /* XXX no locale support yet */
+}
+
+bool
+Perl_is_uni_cntrl_lc(pTHX_ U32 c)
+{
+ return is_uni_cntrl(c); /* XXX no locale support yet */
+}
+
+bool
+Perl_is_uni_graph_lc(pTHX_ U32 c)
+{
+ return is_uni_graph(c); /* XXX no locale support yet */
+}
+
+bool
+Perl_is_uni_print_lc(pTHX_ U32 c)
+{
+ return is_uni_print(c); /* XXX no locale support yet */
+}
+
+bool
+Perl_is_uni_punct_lc(pTHX_ U32 c)
+{
+ return is_uni_punct(c); /* XXX no locale support yet */
+}
+
+bool
+Perl_is_uni_xdigit_lc(pTHX_ U32 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 */
+}
+
+U32
+Perl_to_uni_title_lc(pTHX_ U32 c)
+{
+ return to_uni_title(c); /* XXX no locale support yet */
+}
+
+U32
+Perl_to_uni_lower_lc(pTHX_ U32 c)
+{
+ return to_uni_lower(c); /* XXX no locale support yet */
+}
+
+bool
+Perl_is_utf8_alnum(pTHX_ U8 *p)
+{
+ if (!is_utf8_char(p))
+ return FALSE;
+ if (!PL_utf8_alnum)
+ PL_utf8_alnum = swash_init("utf8", "IsAlnum", &PL_sv_undef, 0, 0);
+ return swash_fetch(PL_utf8_alnum, p);
+/* 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);
+#endif
+}
+
+bool
+Perl_is_utf8_alnumc(pTHX_ U8 *p)
+{
+ if (!is_utf8_char(p))
+ 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 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);
+#endif
+}
+
+bool
+Perl_is_utf8_idfirst(pTHX_ U8 *p)
+{
+ return *p == '_' || is_utf8_alpha(p);
+}
+
+bool
+Perl_is_utf8_alpha(pTHX_ U8 *p)
+{
+ if (!is_utf8_char(p))
+ 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);
+}
+
+bool
+Perl_is_utf8_ascii(pTHX_ U8 *p)
+{
+ if (!is_utf8_char(p))
+ 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);
+}
+
+bool
+Perl_is_utf8_space(pTHX_ U8 *p)
+{
+ if (!is_utf8_char(p))
+ return FALSE;
+ if (!PL_utf8_space)
+ PL_utf8_space = swash_init("utf8", "IsSpace", &PL_sv_undef, 0, 0);
+ return swash_fetch(PL_utf8_space, p);
+}
+
+bool
+Perl_is_utf8_digit(pTHX_ U8 *p)
+{
+ if (!is_utf8_char(p))
+ 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);
+}
+
+bool
+Perl_is_utf8_upper(pTHX_ U8 *p)
+{
+ if (!is_utf8_char(p))
+ 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);
+}
+
+bool
+Perl_is_utf8_lower(pTHX_ U8 *p)
+{
+ if (!is_utf8_char(p))
+ 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);
+}
+
+bool
+Perl_is_utf8_cntrl(pTHX_ U8 *p)
+{
+ if (!is_utf8_char(p))
+ 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);
+}
+
+bool
+Perl_is_utf8_graph(pTHX_ U8 *p)
+{
+ if (!is_utf8_char(p))
+ 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);
+}
+
+bool
+Perl_is_utf8_print(pTHX_ U8 *p)
+{
+ if (!is_utf8_char(p))
+ 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);
+}
+
+bool
+Perl_is_utf8_punct(pTHX_ U8 *p)
+{
+ if (!is_utf8_char(p))
+ 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);
+}
+
+bool
+Perl_is_utf8_xdigit(pTHX_ U8 *p)
+{
+ if (!is_utf8_char(p))
+ 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);
+}
+
+bool
+Perl_is_utf8_mark(pTHX_ U8 *p)
+{
+ if (!is_utf8_char(p))
+ 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);
+}
+
+UV
+Perl_to_utf8_upper(pTHX_ U8 *p)
+{
+ 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,0);
+}
+
+UV
+Perl_to_utf8_title(pTHX_ U8 *p)
+{
+ UV uv;
+
+ 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,0);
+}
+
+UV
+Perl_to_utf8_lower(pTHX_ U8 *p)
+{
+ UV uv;
+
+ 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,0);
+}
+
+/* a "swash" is a swatch hash */
+
+SV*
+Perl_swash_init(pTHX_ char* pkg, char* name, SV *listsv, I32 minbits, I32 none)
+{
+ SV* retval;
+ char tmpbuf[256];
+ dSP;
+
+ if (!gv_stashpv(pkg, 0)) { /* demand load utf8 */
+ ENTER;
+ Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, newSVpv(pkg,0), Nullsv);
+ LEAVE;
+ }
+ SPAGAIN;
+ PUSHSTACKi(PERLSI_MAGIC);
+ PUSHMARK(SP);
+ EXTEND(SP,5);
+ PUSHs(sv_2mortal(newSVpvn(pkg, strlen(pkg))));
+ PUSHs(sv_2mortal(newSVpvn(name, strlen(name))));
+ PUSHs(listsv);
+ PUSHs(sv_2mortal(newSViv(minbits)));
+ PUSHs(sv_2mortal(newSViv(none)));
+ PUTBACK;
+ ENTER;
+ 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 (call_method("SWASHNEW", G_SCALAR))
+ retval = newSVsv(*PL_stack_sp--);
+ else
+ retval = &PL_sv_undef;
+ LEAVE;
+ POPSTACK;
+ if (PL_curcop == &PL_compiling) {
+ strncpy(PL_tokenbuf, tmpbuf, sizeof tmpbuf);
+ PL_curcop->op_private = PL_hints;
+ }
+ if (!SvROK(retval) || SvTYPE(SvRV(retval)) != SVt_PVHV)
+ Perl_croak(aTHX_ "SWASHNEW didn't return an HV ref");
+ return retval;
+}
+
+UV
+Perl_swash_fetch(pTHX_ SV *sv, U8 *ptr)
+{
+ HV* hv = (HV*)SvRV(sv);
+ U32 klen = UTF8SKIP(ptr) - 1;
+ U32 off = ptr[klen] & 127; /* NB: 64 bit always 0 when len > 1 */
+ STRLEN slen;
+ STRLEN needents = (klen ? 64 : 128);
+ U8 *tmps;
+ U32 bit;
+ SV *retval;
+
+ /*
+ * This single-entry cache saves about 1/3 of the utf8 overhead in test
+ * suite. (That is, only 7-8% overall over just a hash cache. Still,
+ * it's nothing to sniff at.) Pity we usually come through at least
+ * two function calls to get here...
+ *
+ * NB: this code assumes that swatches are never modified, once generated!
+ */
+
+ if (hv == PL_last_swash_hv &&
+ klen == PL_last_swash_klen &&
+ (!klen || memEQ(ptr,PL_last_swash_key,klen)) )
+ {
+ tmps = PL_last_swash_tmps;
+ slen = PL_last_swash_slen;
+ }
+ else {
+ /* Try our second-level swatch cache, kept in a hash. */
+ SV** svp = hv_fetch(hv, (char*)ptr, klen, FALSE);
+
+ /* If not cached, generate it via utf8::SWASHGET */
+ if (!svp || !SvPOK(*svp) || !(tmps = (U8*)SvPV(*svp, slen))) {
+ dSP;
+ ENTER;
+ SAVETMPS;
+ save_re_context();
+ PUSHSTACKi(PERLSI_MAGIC);
+ PUSHMARK(SP);
+ EXTEND(SP,3);
+ PUSHs((SV*)sv);
+ PUSHs(sv_2mortal(newSViv(utf8_to_uv(ptr, 0) & ~(needents - 1))));
+ PUSHs(sv_2mortal(newSViv(needents)));
+ PUTBACK;
+ if (call_method("SWASHGET", G_SCALAR))
+ retval = newSVsv(*PL_stack_sp--);
+ else
+ retval = &PL_sv_undef;
+ POPSTACK;
+ FREETMPS;
+ LEAVE;
+ if (PL_curcop == &PL_compiling)
+ PL_curcop->op_private = PL_hints;
+
+ svp = hv_store(hv, (char*)ptr, klen, retval, 0);
+
+ if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) || slen < 8)
+ Perl_croak(aTHX_ "SWASHGET didn't return result of proper length");
+ }
+
+ PL_last_swash_hv = hv;
+ PL_last_swash_klen = klen;
+ PL_last_swash_tmps = tmps;
+ PL_last_swash_slen = slen;
+ if (klen)
+ Copy(ptr, PL_last_swash_key, klen, U8);
+ }
+
+ switch ((slen << 3) / needents) {
+ case 1:
+ bit = 1 << (off & 7);
+ off >>= 3;
+ return (tmps[off] & bit) != 0;
+ case 8:
+ return tmps[off];
+ case 16:
+ off <<= 1;
+ return (tmps[off] << 8) + tmps[off + 1] ;
+ case 32:
+ 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;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-16 06:41:13 +0000