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path: root/libcharconv_double_struck.c
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/* See LICENSE file for copyright and license details. */
#include "libcharconv.h"


enum libcharconv_result
libcharconv_double_struck(const char *s, size_t slen, size_t *n, uint_least32_t *cp, size_t *ncp)
{
	uint_least32_t c;
	*n = 0;
	for (; slen--; s++) {
		if (*s == 'C') {
			c = (uint_least32_t)UINT32_C(0x2102);
			goto conv;
		} else if (*s == 'H') {
			c = (uint_least32_t)UINT32_C(0x210D);
			goto conv;
		} else if (*s == 'N') {
			c = (uint_least32_t)UINT32_C(0x2115);
			goto conv;
		} else if (*s == 'P') {
			c = (uint_least32_t)UINT32_C(0x2119);
			goto conv;
		} else if (*s == 'Q') {
			c = (uint_least32_t)UINT32_C(0x211A);
			goto conv;
		} else if (*s == 'R') {
			c = (uint_least32_t)UINT32_C(0x211D);
			goto conv;
		} else if (*s == 'Z') {
			c = (uint_least32_t)UINT32_C(0x2124);
			goto conv;
		} else if ('A' <= *s && *s <= 'Z') {
			c = (uint_least32_t)(UINT32_C(0x1D538) + (unsigned)(*s - 'A'));
			goto conv;
		} else if ('a' <= *s && *s <= 'z') {
			c = (uint_least32_t)(UINT32_C(0x1D552) + (unsigned)(*s - 'a'));
			goto conv;
		} else if ('0' <= *s && *s <= '9') {
			c = (uint_least32_t)(UINT32_C(0x1D7D8) + (unsigned)(*s - '0'));
			goto conv;
		} else {
			*n += 1u;
		}
	}
no_conv:
	return LIBCHARCONV_NO_CONVERT;

conv:
	if (*n)
		goto no_conv;
	if (*ncp)
		*cp = c;
	*n += 1u;
	*ncp = 1u;
	return LIBCHARCONV_CONVERTED;
}