return len;
}
+/*
+=for apidoc Am|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.
+
+=cut
+*/
+
+bool
+Perl_is_utf8_string(pTHX_ U8 *s, STRLEN len)
+{
+ U8* x=s;
+ U8* send=s+len;
+ int c;
+ while (x < send) {
+ c = is_utf8_char(x);
+ x += c;
+ if (!c || x > send)
+ return 0;
+ }
+ return 1;
+}
+
+/*
+=for apidoc Am|U8* s|utf8_to_uv_chk|I32 *retlen|I32 checking
+
+Returns the 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.
+
+If C<s> does not point to a well-formed UTF8 character, the behaviour
+is dependent on the value of C<checking>: if this is true, it is
+assumed that the caller will raise a warning, and this function will
+set C<retlen> to C<-1> and return. If C<checking> is not true, an optional UTF8
+warning is produced.
+
+=cut
+*/
+
UV
-Perl_utf8_to_uv(pTHX_ U8* s, I32* retlen)
+Perl_utf8_to_uv_chk(pTHX_ U8* s, I32* retlen, bool checking)
{
UV uv = *s;
int len;
}
if (!(uv & 0x40)) {
dTHR;
- if (ckWARN_d(WARN_UTF8))
+ if (checking && retlen) {
+ *retlen = -1;
+ return 0;
+ }
+
+ if (ckWARN_d(WARN_UTF8))
Perl_warner(aTHX_ WARN_UTF8, "Malformed UTF-8 character");
if (retlen)
*retlen = 1;
while (len--) {
if ((*s & 0xc0) != 0x80) {
dTHR;
- if (ckWARN_d(WARN_UTF8))
+ if (checking && retlen) {
+ *retlen = -1;
+ return 0;
+ }
+
+ if (ckWARN_d(WARN_UTF8))
Perl_warner(aTHX_ WARN_UTF8, "Malformed UTF-8 character");
if (retlen)
*retlen -= len + 1;
return uv;
}
-/* utf8_distance(a,b) is intended to be a - b in pointer arithmetic */
+/*
+=for apidoc Am|U8* s|utf8_to_uv|I32 *retlen
+
+Returns the 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.
+
+If C<s> does not point to a well-formed UTF8 character, an optional UTF8
+warning is produced.
+
+=cut
+*/
+
+UV
+Perl_utf8_to_uv(pTHX_ U8* s, I32* retlen)
+{
+ return Perl_utf8_to_uv_chk(aTHX_ s, retlen, 0);
+}
+
+/* utf8_distance(a,b) returns the number of UTF8 characters between
+ the pointers a and b */
I32
Perl_utf8_distance(pTHX_ U8 *a, U8 *b)
return s;
}
-/* XXX NOTHING CALLS THE FOLLOWING TWO ROUTINES YET!!! */
/*
- * Convert native or reversed UTF-16 to UTF-8.
+=for apidoc Am|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
+updates len to contain the new length.
+Returns zero on failure, setting C<len> to -1.
+
+=cut
+*/
+
+U8 *
+Perl_utf8_to_bytes(pTHX_ U8* s, STRLEN *len)
+{
+ dTHR;
+ U8 *send;
+ U8 *d;
+ U8 *save;
+
+ send = s + *len;
+ d = save = s;
+
+ /* ensure valid UTF8 and chars < 256 before updating string */
+ while (s < send) {
+ U8 c = *s++;
+ if (c >= 0x80 &&
+ ( (s >= send) || ((*s++ & 0xc0) != 0x80) || ((c & 0xfe) != 0xc2))) {
+ *len = -1;
+ return 0;
+ }
+ }
+ s = save;
+ while (s < send) {
+ if (*s < 0x80)
+ *d++ = *s++;
+ else {
+ I32 ulen;
+ *d++ = (U8)utf8_to_uv(s, &ulen);
+ s += ulen;
+ }
+ }
+ *d = '\0';
+ *len = d - save;
+ return save;
+}
+
+/*
+=for apidoc Am|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
+reflect the new length.
+
+=cut
+*/
+
+U8*
+Perl_bytes_to_utf8(pTHX_ U8* s, STRLEN *len)
+{
+ dTHR;
+ U8 *send;
+ U8 *d;
+ U8 *dst;
+ send = s + (*len);
+
+ Newz(801, d, (*len) * 2 + 1, U8);
+ dst = d;
+
+ while (s < send) {
+ if (*s < 0x80)
+ *d++ = *s++;
+ else {
+ UV uv = *s++;
+ *d++ = (( uv >> 6) | 0xc0);
+ *d++ = (( uv & 0x3f) | 0x80);
+ }
+ }
+ *d = '\0';
+ *len = d-dst;
+ return dst;
+}
+
+/*
+ * Convert native (big-endian) or reversed (little-endian) 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)
+Perl_utf16_to_utf8(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen)
{
- U16* pend = p + bytelen / 2;
+ U8* pend;
+ U8* dstart = d;
+
+ if (bytelen & 1)
+ Perl_croak(aTHX_ "panic: utf16_to_utf8: odd bytelen");
+
+ pend = p + bytelen;
+
while (p < pend) {
- UV uv = *p++;
+ UV uv = (p[0] << 8) + p[1]; /* UTF-16BE */
+ p += 2;
if (uv < 0x80) {
*d++ = uv;
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 low = *p++;
+ if (low < 0xdc00 || low >= 0xdfff)
+ Perl_croak(aTHX_ "Malformed UTF-16 surrogate");
uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000;
}
if (uv < 0x10000) {
continue;
}
}
+ *newlen = d - dstart;
return d;
}
/* Note: this one is slightly destructive of the source. */
U8*
-Perl_utf16_to_utf8_reversed(pTHX_ U16* p, U8* d, I32 bytelen)
+Perl_utf16_to_utf8_reversed(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen)
{
U8* s = (U8*)p;
U8* send = s + bytelen;
s[1] = tmp;
s += 2;
}
- return utf16_to_utf8(p, d, bytelen);
+ return utf16_to_utf8(p, d, bytelen, newlen);
}
/* for now these are all defined (inefficiently) in terms of the utf8 versions */
if (!is_utf8_char(p))
return FALSE;
if (!PL_utf8_alnum)
- PL_utf8_alnum = swash_init("utf8", "IsAlnum", &PL_sv_undef, 0, 0);
+ /* 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);
/* return *p == '_' || is_utf8_alpha(p) || is_utf8_digit(p); */
#ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */
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);
+ return uv ? uv : utf8_to_uv_chk(p,0,0);
}
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);
+ return uv ? uv : utf8_to_uv_chk(p,0,0);
}
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);
+ return uv ? uv : utf8_to_uv_chk(p,0,0);
}
/* a "swash" is a swatch hash */
{
SV* retval;
char tmpbuf[256];
- dSP;
+ dSP;
if (!gv_stashpv(pkg, 0)) { /* demand load utf8 */
ENTER;
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--);
+ retval = newSVsv(*PL_stack_sp--);
else
retval = &PL_sv_undef;
LEAVE;
PUSHMARK(SP);
EXTEND(SP,3);
PUSHs((SV*)sv);
- PUSHs(sv_2mortal(newSViv(utf8_to_uv(ptr, 0) & ~(needents - 1))));
+ PUSHs(sv_2mortal(newSViv(utf8_to_uv_chk(ptr, 0, 0) & ~(needents - 1))));
PUSHs(sv_2mortal(newSViv(needents)));
PUTBACK;
if (call_method("SWASHGET", G_SCALAR))
- retval = newSVsv(*PL_stack_sp--);
+ retval = newSVsv(*PL_stack_sp--);
else
retval = &PL_sv_undef;
POPSTACK;
projects / p5sagit/p5-mst-13.2.git / blobdiff