Add mayan

Signed-off-by: Mattias Andrée <m@maandree.se>

1 files changed, 57 insertions, 0 deletions

diff --git a/libcharconv_mayan.c b/libcharconv_mayan.c
new file mode 100644
index 0000000..48bf037
--- /dev/null
+++ b/libcharconv_mayan.c
@@ -0,0 +1,57 @@
+/* See LICENSE file for copyright and license details. */
+#include "lib-common.h"
+
+
+enum libcharconv_result
+libcharconv_mayan(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 == '1') {
+			if (!slen) {
+				c = UINT32_C(0x1D2E0) + (unsigned)(*s - '0');
+				goto conv_if_end;
+			}
+			if ('0' > s[1] || s[1] > '9')
+				goto one;
+			c = UINT32_C(0x1D2E0) + (unsigned)(s[0] - '0') * 10u + (unsigned)(s[1] - '0');
+			goto conv2;
+		} else if ('0' <= *s && *s <= '9') {
+		one:
+			c = UINT32_C(0x1D2E0) + (unsigned)(*s - '0');
+			goto conv1;
+		} else {
+			*n += 1u;
+		}
+	}
+no_conv:
+	return LIBCHARCONV_NO_CONVERT;
+
+conv_if_end:
+	if (*n)
+		goto no_conv;
+	if (*ncp)
+		*cp = c;
+	*n += 1u;
+	*ncp = 1u;
+	return LIBCHARCONV_CONVERT_IF_END;
+
+conv1:
+	if (*n)
+		goto no_conv;
+	if (*ncp)
+		*cp = c;
+	*n += 1u;
+	*ncp = 1u;
+	return LIBCHARCONV_CONVERTED;
+
+conv2:
+	if (*n)
+		goto no_conv;
+	if (*ncp)
+		*cp = c;
+	*n += 2u;
+	*ncp = 1u;
+	return LIBCHARCONV_CONVERTED;
+}