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/* See LICENSE file for copyright and license details. */
#include "lib-common.h"
enum libcharconv_result
libcharconv_transposed(const char *s, size_t slen, size_t *n, uint_least32_t *cp, size_t *ncp)
{
uint_least32_t c;
size_t clen;
*n = 0;
while (slen) {
clen = libcharconv_decode_utf8_(s, slen, &c);
if (clen > slen) {
if (*n)
goto no_conv;
return LIBCHARCONV_INDETERMINATE;
}
if (!clen) {
*n += 1u;
slen -= 1u;
s = &s[1];
continue;
}
if (UINT32_C(0x1F030) <= c && c <= UINT32_C(0x1F061)) {
c += 0x32u;
goto conv;
} else if (UINT32_C(0x1F062) <= c && c <= UINT32_C(0x1F093)) {
c -= 0x32u;
goto conv;
}
*n += clen;
s = &s[clen];
slen -= clen;
}
no_conv:
return LIBCHARCONV_NO_CONVERT;
conv:
if (*n)
goto no_conv;
if (*ncp)
*cp = c;
*n += clen;
*ncp = 1u;
return LIBCHARCONV_CONVERTED;
}
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