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Simplify hb_utf_prev<8> to call hb_utf_next<8>

This commit is contained in:
Behdad Esfahbod 2014-07-11 13:58:36 -04:00
parent efe74214bb
commit db8934faa1
1 changed files with 4 additions and 20 deletions
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24
src/hb-utf-private.hh
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@ -81,27 +81,11 @@ hb_utf_prev (const uint8_t *text,
while (start < text && (*text & 0xc0) == 0x80 && end - text < 4) while (start < text && (*text & 0xc0) == 0x80 && end - text < 4)
text--; text--;
hb_codepoint_t c = *text, mask; if (likely (hb_utf_next (text, end, unicode) == end))
unsigned int len;
/* TODO check for overlong sequences? */
HB_UTF8_COMPUTE (c, mask, len);
if (unlikely (!len || (unsigned int) (end - text) != len)) {
*unicode = -1;
return end - 1;
} else {
hb_codepoint_t result;
unsigned int i;
result = c & mask;
for (i = 1; i < len; i++)
{
result <<= 6;
result |= (text[i] & 0x3f);
}
*unicode = result;
return text; return text;
}
*unicode = -1;
return end - 1;
} }