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/* See LICENSE file for copyright and license details. */
#include "lib-common.h"
static struct {
uint_least32_t a;
uint_least32_t b;
} pairs[] = {
{0x2032, 0x2035},
{0x2033, 0x2036},
{0x2034, 0x2037},
{0x204F, 0x003B},
{0x2E2E, 0x003F},
{0x2143, 0x004C},
{UINT32_C(0xA4ED), (uint_least32_t)'B'},
{UINT32_C(0xA4DB), (uint_least32_t)'C'},
{UINT32_C(0xA4F7), (uint_least32_t)'D'},
{UINT32_C(0xA4F1), (uint_least32_t)'E'},
{UINT32_C(0xA4D8), (uint_least32_t)'K'},
{UINT32_C(0x1F12F), UINT32_C(0x00A9)}
};
enum libcharconv_result
libcharconv_mirrored(const char *s, size_t slen, size_t *n, uint_least32_t *cp, size_t *ncp)
{
uint_least32_t c;
size_t i, 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(0x1F031) <= c && c <= UINT32_C(0x1F061)) {
c -= UINT32_C(0x1F031);
c = c % 7u * 7u + c / 7u;
c += UINT32_C(0x1F031);
goto conv;
} else {
for (i = 0u; i < sizeof(pairs) / sizeof(*pairs); i++) {
if (c == pairs[i].a) {
c = pairs[i].b;
goto conv;
}
if (c == pairs[i].b) {
c = pairs[i].a;
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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