return len;
}
+/*
+=for apidoc Am|bool_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;
+}
+
UV
Perl_utf8_to_uv(pTHX_ U8* s, I32* retlen)
{
Converts a string C<s> of length C<len> from UTF8 into ASCII encoding.
Unlike C<bytes_to_utf8>, this over-writes the original string.
+Returns zero on failure after converting as much as possible.
=cut
*/
else {
I32 ulen;
UV uv = utf8_to_uv(s, &ulen);
+ if (uv > 255) {
+ *d = '\0';
+ return 0;
+ }
s += ulen;
*d++ = (U8)uv;
}
}
/*
-=for apidoc Am|U8 *|bytes_to_utf8|U8 *s|STRLEN len
+=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.
+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)
+Perl_bytes_to_utf8(pTHX_ U8* s, STRLEN *len)
{
dTHR;
U8 *send;
U8 *d;
U8 *dst;
- send = s + len;
+ send = s + (*len);
- Newz(801, d, len * 2 + 1, U8);
+ Newz(801, d, (*len) * 2 + 1, U8);
dst = d;
while (s < send) {
}
}
*d = '\0';
+ *len = d-dst;
return dst;
}