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/* See LICENSE file for copyright and license details. */
#include "lib-common.h"
enum libcharconv_result
libcharconv_braille(const char *s, size_t slen, size_t *n, uint_least32_t *cp, size_t *ncp)
{
unsigned pattern, dot;
uint_least32_t c;
*n = 0;
for (; slen--; s++) {
if (s[0] == '0') {
if (*n)
goto no_conv;
c = UINT32_C(0x2800);
*n = 1u;
goto conv;
} else if ('1' <= s[0] && s[0] <= '8') {
if (*n)
goto no_conv;
pattern = 1u << (s[0] - '1');
*n = 1u;
for (;;) {
if (!slen--)
goto indeterminate;
if ('1' <= s[*n] && s[*n] <= '8') {
dot = 1u << (s[*n] - '1');
if (pattern & dot)
break;
pattern |= dot;
*n += 1u;
} else if (s[*n] == '0') {
*n += 1u;
break;
} else {
break;
}
}
c = UINT32_C(0x2800) | pattern;
goto conv;
} else {
*n += 1u;
}
}
return LIBCHARCONV_NO_CONVERT;
no_conv:
if (!*n)
*n = 1u;
return LIBCHARCONV_NO_CONVERT;
indeterminate:
if (*n)
goto no_conv;
return LIBCHARCONV_INDETERMINATE;
conv:
if (*ncp)
*cp = c;
*ncp = 1u;
return LIBCHARCONV_CONVERTED;
}
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