JOE - Joe's own editor Mercurial

--- a/joe/unicode.c
+++ b/joe/unicode.c
@@ -553,6 +553,106 @@
 	return 1;
 }
 
+#ifdef JOEWIN
+
+/* Provide standard implementation for PuTTY */
+
+int wcwidth(int ucs)
+{
+	if (!ucs)
+		return 0;
+	if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0))
+		return -1;
+
+	if (cclass_lookup(cclass_combining, ucs))
+		return 0;
+
+	if (cclass_lookup(cclass_double, ucs))
+		return 2;
+
+	return 1;
+}
+
+/* TODO: Somehow incorporate this into unicat.c generation */
+int wcwidth_cjk(int ucs)
+{
+	static const struct
+	{
+		int first;
+		int last;
+	} ambiguous[] = {
+		{ 0x00A1, 0x00A1 }, { 0x00A4, 0x00A4 }, { 0x00A7, 0x00A8 },
+		{ 0x00AA, 0x00AA }, { 0x00AE, 0x00AE }, { 0x00B0, 0x00B4 },
+		{ 0x00B6, 0x00BA }, { 0x00BC, 0x00BF }, { 0x00C6, 0x00C6 },
+		{ 0x00D0, 0x00D0 }, { 0x00D7, 0x00D8 }, { 0x00DE, 0x00E1 },
+		{ 0x00E6, 0x00E6 }, { 0x00E8, 0x00EA }, { 0x00EC, 0x00ED },
+		{ 0x00F0, 0x00F0 }, { 0x00F2, 0x00F3 }, { 0x00F7, 0x00FA },
+		{ 0x00FC, 0x00FC }, { 0x00FE, 0x00FE }, { 0x0101, 0x0101 },
+		{ 0x0111, 0x0111 }, { 0x0113, 0x0113 }, { 0x011B, 0x011B },
+		{ 0x0126, 0x0127 }, { 0x012B, 0x012B }, { 0x0131, 0x0133 },
+		{ 0x0138, 0x0138 }, { 0x013F, 0x0142 }, { 0x0144, 0x0144 },
+		{ 0x0148, 0x014B }, { 0x014D, 0x014D }, { 0x0152, 0x0153 },
+		{ 0x0166, 0x0167 }, { 0x016B, 0x016B }, { 0x01CE, 0x01CE },
+		{ 0x01D0, 0x01D0 }, { 0x01D2, 0x01D2 }, { 0x01D4, 0x01D4 },
+		{ 0x01D6, 0x01D6 }, { 0x01D8, 0x01D8 }, { 0x01DA, 0x01DA },
+		{ 0x01DC, 0x01DC }, { 0x0251, 0x0251 }, { 0x0261, 0x0261 },
+		{ 0x02C4, 0x02C4 }, { 0x02C7, 0x02C7 }, { 0x02C9, 0x02CB },
+		{ 0x02CD, 0x02CD }, { 0x02D0, 0x02D0 }, { 0x02D8, 0x02DB },
+		{ 0x02DD, 0x02DD }, { 0x02DF, 0x02DF }, { 0x0391, 0x03A1 },
+		{ 0x03A3, 0x03A9 }, { 0x03B1, 0x03C1 }, { 0x03C3, 0x03C9 },
+		{ 0x0401, 0x0401 }, { 0x0410, 0x044F }, { 0x0451, 0x0451 },
+		{ 0x2010, 0x2010 }, { 0x2013, 0x2016 }, { 0x2018, 0x2019 },
+		{ 0x201C, 0x201D }, { 0x2020, 0x2022 }, { 0x2024, 0x2027 },
+		{ 0x2030, 0x2030 }, { 0x2032, 0x2033 }, { 0x2035, 0x2035 },
+		{ 0x203B, 0x203B }, { 0x203E, 0x203E }, { 0x2074, 0x2074 },
+		{ 0x207F, 0x207F }, { 0x2081, 0x2084 }, { 0x20AC, 0x20AC },
+		{ 0x2103, 0x2103 }, { 0x2105, 0x2105 }, { 0x2109, 0x2109 },
+		{ 0x2113, 0x2113 }, { 0x2116, 0x2116 }, { 0x2121, 0x2122 },
+		{ 0x2126, 0x2126 }, { 0x212B, 0x212B }, { 0x2153, 0x2154 },
+		{ 0x215B, 0x215E }, { 0x2160, 0x216B }, { 0x2170, 0x2179 },
+		{ 0x2190, 0x2199 }, { 0x21B8, 0x21B9 }, { 0x21D2, 0x21D2 },
+		{ 0x21D4, 0x21D4 }, { 0x21E7, 0x21E7 }, { 0x2200, 0x2200 },
+		{ 0x2202, 0x2203 }, { 0x2207, 0x2208 }, { 0x220B, 0x220B },
+		{ 0x220F, 0x220F }, { 0x2211, 0x2211 }, { 0x2215, 0x2215 },
+		{ 0x221A, 0x221A }, { 0x221D, 0x2220 }, { 0x2223, 0x2223 },
+		{ 0x2225, 0x2225 }, { 0x2227, 0x222C }, { 0x222E, 0x222E },
+		{ 0x2234, 0x2237 }, { 0x223C, 0x223D }, { 0x2248, 0x2248 },
+		{ 0x224C, 0x224C }, { 0x2252, 0x2252 }, { 0x2260, 0x2261 },
+		{ 0x2264, 0x2267 }, { 0x226A, 0x226B }, { 0x226E, 0x226F },
+		{ 0x2282, 0x2283 }, { 0x2286, 0x2287 }, { 0x2295, 0x2295 },
+		{ 0x2299, 0x2299 }, { 0x22A5, 0x22A5 }, { 0x22BF, 0x22BF },
+		{ 0x2312, 0x2312 }, { 0x2460, 0x24E9 }, { 0x24EB, 0x254B },
+		{ 0x2550, 0x2573 }, { 0x2580, 0x258F }, { 0x2592, 0x2595 },
+		{ 0x25A0, 0x25A1 }, { 0x25A3, 0x25A9 }, { 0x25B2, 0x25B3 },
+		{ 0x25B6, 0x25B7 }, { 0x25BC, 0x25BD }, { 0x25C0, 0x25C1 },
+		{ 0x25C6, 0x25C8 }, { 0x25CB, 0x25CB }, { 0x25CE, 0x25D1 },
+		{ 0x25E2, 0x25E5 }, { 0x25EF, 0x25EF }, { 0x2605, 0x2606 },
+		{ 0x2609, 0x2609 }, { 0x260E, 0x260F }, { 0x2614, 0x2615 },
+		{ 0x261C, 0x261C }, { 0x261E, 0x261E }, { 0x2640, 0x2640 },
+		{ 0x2642, 0x2642 }, { 0x2660, 0x2661 }, { 0x2663, 0x2665 },
+		{ 0x2667, 0x266A }, { 0x266C, 0x266D }, { 0x266F, 0x266F },
+		{ 0x273D, 0x273D }, { 0x2776, 0x277F }, { 0xE000, 0xF8FF },
+		{ 0xFFFD, 0xFFFD }, { 0xF0000, 0xFFFFD }, { 0x100000, 0x10FFFD }
+	};
+
+	int left = 0, right = (SIZEOF(ambiguous) / SIZEOF(ambiguous[0])) - 1;
+
+	while (left <= right) {
+		int mid = (left + right) / 2;
+		if (ucs < ambiguous[mid].first) {
+			right = mid - 1;
+		} else if (ucs > ambiguous[mid].last) {
+			left = mid + 1;
+		} else {
+			return 2;
+		}
+	}
+
+	return wcwidth(ucs);
+}
+
+#endif
+
 /* Width of a string: was in qw.c.  Do we need both this and txtwidth?
    This one does not account for tabs. */