/**
* Get the index of the last occurrence of a character in a dom string
*
* \param str The string to search in
* \param chr UCS4 value to look for
* \return Character index of found character, or -1 if none found
*/
off_t dom_string_rindex(dom_string *str, uint32_t chr)
{
const uint8_t *s;
size_t clen = 0, slen;
uint32_t c = 0;
off_t coff, index;
parserutils_error err;
s = (const uint8_t *) dom_string_data(str);
slen = dom_string_byte_length(str);
index = dom_string_length(str);
while (slen > 0) {
err = parserutils_charset_utf8_prev(s, slen,
(off_t *) &coff);
if (err == PARSERUTILS_OK) {
err = parserutils_charset_utf8_to_ucs4(s + coff,
slen - clen, &c, &clen);
}
if (err != PARSERUTILS_OK) {
return (uint32_t) -1;
}
if (c == chr) {
return index;
}
slen -= clen;
index--;
}
return (uint32_t) -1;
}
/**
* Find previous legal UTF-8 char in string
*
* \param s The string
* \param o Offset in the string to start at
* \return Offset of first byte of previous legal character
*/
size_t utf8_prev(const char *s, size_t o)
{
uint32_t prev;
parserutils_error perror;
perror = parserutils_charset_utf8_prev((const uint8_t *) s, o, &prev);
assert(perror == PARSERUTILS_OK);
return prev;
}
