Add bracketed

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

1 files changed, 141 insertions, 0 deletions

diff --git a/libcharconv_bracketed.c b/libcharconv_bracketed.c
new file mode 100644
index 0000000..cff49c9
--- /dev/null
+++ b/libcharconv_bracketed.c
@@ -0,0 +1,141 @@
+/* See LICENSE file for copyright and license details. */
+#include "lib-common.h"
+
+
+enum libcharconv_result
+libcharconv_bracketed(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 ('0' <= s[0] && s[0] <= '9') {
+			if (!slen)
+				goto indeterminate;
+			if (s[1] == ',') {
+				c = UINT32_C(0x1F101) + (unsigned)(s[0] - '0');
+				goto conv2;
+			} else if (s[1] == '.') {
+				if (s[0] == '0')
+					c = UINT32_C(0x1F100);
+				else
+					c = UINT32_C(0x2488) + (unsigned)(s[0] - '1');
+				goto conv2;
+			} else if (s[0] == '1' && '0' <= s[1] && s[1] <= '9') {
+				if (slen < 2u)
+					goto indeterminate;
+				if (s[2] == '.')
+					c = UINT32_C(0x2491) + (unsigned)(s[1] - '0');
+				else
+					goto no_match;
+				goto conv3;
+			} else if (s[0] == '2' && s[1] == '0') {
+				if (slen < 2u)
+					goto indeterminate;
+				if (s[2] == '.')
+					c = UINT32_C(0x249B);
+				else
+					goto no_match;
+				goto conv3;
+			} else {
+				goto no_match;
+			}
+		} else if (s[0] == '(') {
+			if (!slen--)
+				goto indeterminate;
+			if (s[1] == '1') {
+				if (!slen--)
+					goto indeterminate;
+				if (s[2] == ')') {
+					c = UINT32_C(0x2474);
+					goto conv3;
+				} else if ('0' <= s[2] && s[2] <= '9') {
+					if (!slen--)
+						goto indeterminate;
+					if (s[3] != ')')
+						goto no_match;
+					c = UINT32_C(0x247D) + (unsigned)(s[2] - '0');
+					goto conv4;
+				} else {
+					goto no_match;
+				}
+			} else if (s[1] == '2') {
+				if (!slen--)
+					goto indeterminate;
+				if (s[2] == ')') {
+					c = UINT32_C(0x2475);
+					goto conv3;
+				} else if (s[2] == '0') {
+					if (!slen--)
+						goto indeterminate;
+					if (s[3] != ')')
+						goto no_match;
+					c = UINT32_C(0x2487);
+					goto conv4;
+				} else {
+					goto no_match;
+				}
+			} else if ('3' <= s[1] && s[1] <= '9') {
+				if (!slen--)
+					goto indeterminate;
+				if (s[2] != ')')
+					goto no_match;
+				c = UINT32_C(0x2474) + (unsigned)(s[1] - '0');
+				goto conv3;
+			} else if ('a' <= s[1] && s[1] <= 'z') {
+				if (!slen--)
+					goto indeterminate;
+				if (s[2] != ')')
+					goto no_match;
+				c = UINT32_C(0x249C) + (unsigned)(s[1] - 'a');
+				goto conv3;
+			} else if ('A' <= s[1] && s[1] <= 'Z') {
+				if (!slen--)
+					goto indeterminate;
+				if (s[2] != ')')
+					goto no_match;
+				c = UINT32_C(0x1F110) + (unsigned)(s[1] - 'A');
+				goto conv3;
+			} else {
+				goto no_match;
+			}
+		} else {
+		no_match:
+			*n += 1u;
+			break;
+		}
+	}
+no_conv:
+	return LIBCHARCONV_NO_CONVERT;
+
+indeterminate:
+	if (*n)
+		goto no_conv;
+	return LIBCHARCONV_INDETERMINATE;
+
+conv2:
+	if (*n)
+		goto no_conv;
+	if (*ncp)
+		*cp = c;
+	*n += 2u;
+	*ncp = 1u;
+	return LIBCHARCONV_CONVERTED;
+
+conv3:
+	if (*n)
+		goto no_conv;
+	if (*ncp)
+		*cp = c;
+	*n += 3u;
+	*ncp = 1u;
+	return LIBCHARCONV_CONVERTED;
+
+conv4:
+	if (*n)
+		goto no_conv;
+	if (*ncp)
+		*cp = c;
+	*n += 4u;
+	*ncp = 1u;
+	return LIBCHARCONV_CONVERTED;
+}