Add enclosed

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

1 files changed, 150 insertions, 0 deletions

diff --git a/libcharconv_enclosed_negative.c b/libcharconv_enclosed_negative.c
new file mode 100644
index 0000000..d7be6a7
--- /dev/null
+++ b/libcharconv_enclosed_negative.c
@@ -0,0 +1,150 @@
+/* See LICENSE file for copyright and license details. */
+#include "lib-common.h"
+
+
+enum libcharconv_result
+libcharconv_enclosed_negative(const char *s, size_t slen, size_t *n, uint_least32_t *cp, size_t *ncp)
+{
+	uint_least32_t c;
+	size_t old_slen;
+	*n = 0;
+	for (; slen--; s++) {
+		old_slen = slen;
+		if (s[0] == '(') {
+			if (!slen--)
+				goto indeterminate;
+			if ((unsigned char)s[1] == 0xF0u) {
+				if (!slen--)
+					goto indeterminate;
+				if ((unsigned char)s[2] != 0x9Du)
+					goto no_match;
+				if (!slen--)
+					goto indeterminate;
+				if ((unsigned char)s[3] != 0x9Fu)
+					goto no_match;
+				if (!slen--)
+					goto indeterminate;
+				if (0xA2u > (unsigned char)s[4] || (unsigned char)s[4] > 0xABu)
+					goto no_match;
+				if (!slen--)
+					goto indeterminate;
+				if (s[5] != ')')
+					goto no_match;
+				c = (unsigned char)s[4] - 0xA2u;
+				if (c == 0)
+					c = UINT32_C(0x1F10C);
+				else
+					c += UINT32_C(0x278A) - 1u;
+				goto conv6;
+			} else if (s[1] == '1') {
+				if (!slen--)
+					goto indeterminate;
+				if (s[2] == ')') {
+					c = UINT32_C(0x2776);
+					goto conv3;
+				} else if ('0' <= s[2] && s[2] <= '9') {
+					if (!slen--)
+						goto indeterminate;
+					if (s[3] != ')')
+						goto no_match;
+					if (s[2] == '0')
+						c = UINT32_C(0x277F);
+					else
+						c = UINT32_C(0x24EB) + (unsigned)(s[2] - '1');
+					goto conv4;
+				} else {
+					goto no_match;
+				}
+			} else if (s[1] == '2') {
+				if (!slen--)
+					goto indeterminate;
+				if (s[2] == ')') {
+					c = UINT32_C(0x2777);
+					goto conv3;
+				} else if (s[2] == '0') {
+					if (!slen--)
+						goto indeterminate;
+					if (s[3] != ')')
+						goto no_match;
+					c = UINT32_C(0x24F4);
+					goto conv4;
+				} else {
+					goto no_match;
+				}
+			} else if (s[1] == '0') {
+				if (!slen--)
+					goto indeterminate;
+				if (s[2] != ')')
+					goto no_match;
+				c = UINT32_C(0x24FF);
+				goto conv3;
+			} else if ('3' <= s[1] && s[1] <= '9') {
+				if (!slen--)
+					goto indeterminate;
+				if (s[2] != ')')
+					goto no_match;
+				c = UINT32_C(0x2776) + (unsigned)(s[1] - '1');
+				goto conv3;
+			} else if ('A' <= s[1] && s[1] <= 'Z') {
+				if (!slen--)
+					goto indeterminate;
+				if (s[2] != ')')
+					goto no_match;
+				c = UINT32_C(0x1F150) + (unsigned)(s[1] - 'A');
+				goto conv3;
+			} else {
+				goto no_match;
+			}
+		} else if (s[0] == '[') {
+			if (!slen--)
+				goto indeterminate;
+			if ('A' <= s[1] && s[1] <= 'Z') {
+				if (!slen--)
+					goto indeterminate;
+				if (s[2] != ']')
+					goto no_match;
+				c = UINT32_C(0x1F170) + (unsigned)(s[1] - 'A');
+				goto conv3;
+			}
+		} else {
+		no_match:
+			slen = old_slen;
+			*n += 1u;
+			break;
+		}
+	}
+no_conv:
+	return LIBCHARCONV_NO_CONVERT;
+
+indeterminate:
+	if (*n)
+		goto no_conv;
+	return LIBCHARCONV_INDETERMINATE;
+
+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;
+
+conv6:
+	if (*n)
+		goto no_conv;
+	if (*ncp)
+		*cp = c;
+	*n += 6u;
+	*ncp = 1u;
+	return LIBCHARCONV_CONVERTED;
+}