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/* See LICENSE file for copyright and license details. */
#include "lib-common.h"
enum libcharconv_result
libcharconv_box_drawing(const char *s, size_t slen, size_t *n, uint_least32_t *cp, size_t *ncp)
{
uint_least32_t a, c;
size_t i;
*n = 0;
for (; slen--; s++, ++*n) {
PLAIN_CASE_SELECT("/\\X", 0x2571);
if ('1' <= *s && *s <= '4') {
c = (uint_least32_t)1 << (*s - '1');
for (i = 1u;; i++) {
if (slen < i)
goto indeterminate;
if ('1' <= s[i] && s[i] <= '4') {
a = (uint_least32_t)1 << (s[i] - '1');
if (a & c)
goto next;
c |= a;
} else if (s[i] == 'O') {
c = (uint_least32_t)" \x00\x01\x07\x02\x04\x09\x0D\x03\x08\x05\x0C\x06\x0B\x0A\x0E"[c];
c |= UINT32_C(0x1FBA0);
if (*n)
goto no_conv;
*n += i + 1u;
goto conv_prechecked;
}
}
}
next:;
}
no_conv:
return LIBCHARCONV_NO_CONVERT;
indeterminate:
if (*n)
goto no_conv;
return LIBCHARCONV_INDETERMINATE;
conv:
if (*n)
goto no_conv;
*n += 1u;
conv_prechecked:
if (*ncp)
*cp = c;
*ncp = 1u;
return LIBCHARCONV_CONVERTED;
}
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