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+#include "vterm_internal.h"
+
+// ### The following from http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
+// With modifications:
+// made functions static
+// moved 'combining' table to file scope, so other functions can see it
+// ###################################################################
+
+/*
+ * This is an implementation of wcwidth() and wcswidth() (defined in
+ * IEEE Std 1002.1-2001) for Unicode.
+ *
+ * http://www.opengroup.org/onlinepubs/007904975/functions/wcwidth.html
+ * http://www.opengroup.org/onlinepubs/007904975/functions/wcswidth.html
+ *
+ * In fixed-width output devices, Latin characters all occupy a single
+ * "cell" position of equal width, whereas ideographic CJK characters
+ * occupy two such cells. Interoperability between terminal-line
+ * applications and (teletype-style) character terminals using the
+ * UTF-8 encoding requires agreement on which character should advance
+ * the cursor by how many cell positions. No established formal
+ * standards exist at present on which Unicode character shall occupy
+ * how many cell positions on character terminals. These routines are
+ * a first attempt of defining such behavior based on simple rules
+ * applied to data provided by the Unicode Consortium.
+ *
+ * For some graphical characters, the Unicode standard explicitly
+ * defines a character-cell width via the definition of the East Asian
+ * FullWidth (F), Wide (W), Half-width (H), and Narrow (Na) classes.
+ * In all these cases, there is no ambiguity about which width a
+ * terminal shall use. For characters in the East Asian Ambiguous (A)
+ * class, the width choice depends purely on a preference of backward
+ * compatibility with either historic CJK or Western practice.
+ * Choosing single-width for these characters is easy to justify as
+ * the appropriate long-term solution, as the CJK practice of
+ * displaying these characters as double-width comes from historic
+ * implementation simplicity (8-bit encoded characters were displayed
+ * single-width and 16-bit ones double-width, even for Greek,
+ * Cyrillic, etc.) and not any typographic considerations.
+ *
+ * Much less clear is the choice of width for the Not East Asian
+ * (Neutral) class. Existing practice does not dictate a width for any
+ * of these characters. It would nevertheless make sense
+ * typographically to allocate two character cells to characters such
+ * as for instance EM SPACE or VOLUME INTEGRAL, which cannot be
+ * represented adequately with a single-width glyph. The following
+ * routines at present merely assign a single-cell width to all
+ * neutral characters, in the interest of simplicity. This is not
+ * entirely satisfactory and should be reconsidered before
+ * establishing a formal standard in this area. At the moment, the
+ * decision which Not East Asian (Neutral) characters should be
+ * represented by double-width glyphs cannot yet be answered by
+ * applying a simple rule from the Unicode database content. Setting
+ * up a proper standard for the behavior of UTF-8 character terminals
+ * will require a careful analysis not only of each Unicode character,
+ * but also of each presentation form, something the author of these
+ * routines has avoided to do so far.
+ *
+ * http://www.unicode.org/unicode/reports/tr11/
+ *
+ * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
+ *
+ * Permission to use, copy, modify, and distribute this software
+ * for any purpose and without fee is hereby granted. The author
+ * disclaims all warranties with regard to this software.
+ *
+ * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
+ */
+
+struct interval {
+ int first;
+ int last;
+};
+
+#if !defined(WCWIDTH_FUNCTION) || !defined(IS_COMBINING_FUNCTION)
+
+/* sorted list of non-overlapping intervals of non-spacing characters */
+/* generated by "uniset +cat=Me +cat=Mn +cat=Cf -00AD +1160-11FF +200B c" */
+// Replaced by the combining table from Vim.
+static const struct interval combining[] = {
+ {0X0300, 0X036F},
+ {0X0483, 0X0489},
+ {0X0591, 0X05BD},
+ {0X05BF, 0X05BF},
+ {0X05C1, 0X05C2},
+ {0X05C4, 0X05C5},
+ {0X05C7, 0X05C7},
+ {0X0610, 0X061A},
+ {0X064B, 0X065F},
+ {0X0670, 0X0670},
+ {0X06D6, 0X06DC},
+ {0X06DF, 0X06E4},
+ {0X06E7, 0X06E8},
+ {0X06EA, 0X06ED},
+ {0X0711, 0X0711},
+ {0X0730, 0X074A},
+ {0X07A6, 0X07B0},
+ {0X07EB, 0X07F3},
+ {0X07FD, 0X07FD},
+ {0X0816, 0X0819},
+ {0X081B, 0X0823},
+ {0X0825, 0X0827},
+ {0X0829, 0X082D},
+ {0X0859, 0X085B},
+ {0X08D3, 0X08E1},
+ {0X08E3, 0X0903},
+ {0X093A, 0X093C},
+ {0X093E, 0X094F},
+ {0X0951, 0X0957},
+ {0X0962, 0X0963},
+ {0X0981, 0X0983},
+ {0X09BC, 0X09BC},
+ {0X09BE, 0X09C4},
+ {0X09C7, 0X09C8},
+ {0X09CB, 0X09CD},
+ {0X09D7, 0X09D7},
+ {0X09E2, 0X09E3},
+ {0X09FE, 0X09FE},
+ {0X0A01, 0X0A03},
+ {0X0A3C, 0X0A3C},
+ {0X0A3E, 0X0A42},
+ {0X0A47, 0X0A48},
+ {0X0A4B, 0X0A4D},
+ {0X0A51, 0X0A51},
+ {0X0A70, 0X0A71},
+ {0X0A75, 0X0A75},
+ {0X0A81, 0X0A83},
+ {0X0ABC, 0X0ABC},
+ {0X0ABE, 0X0AC5},
+ {0X0AC7, 0X0AC9},
+ {0X0ACB, 0X0ACD},
+ {0X0AE2, 0X0AE3},
+ {0X0AFA, 0X0AFF},
+ {0X0B01, 0X0B03},
+ {0X0B3C, 0X0B3C},
+ {0X0B3E, 0X0B44},
+ {0X0B47, 0X0B48},
+ {0X0B4B, 0X0B4D},
+ {0X0B56, 0X0B57},
+ {0X0B62, 0X0B63},
+ {0X0B82, 0X0B82},
+ {0X0BBE, 0X0BC2},
+ {0X0BC6, 0X0BC8},
+ {0X0BCA, 0X0BCD},
+ {0X0BD7, 0X0BD7},
+ {0X0C00, 0X0C04},
+ {0X0C3E, 0X0C44},
+ {0X0C46, 0X0C48},
+ {0X0C4A, 0X0C4D},
+ {0X0C55, 0X0C56},
+ {0X0C62, 0X0C63},
+ {0X0C81, 0X0C83},
+ {0X0CBC, 0X0CBC},
+ {0X0CBE, 0X0CC4},
+ {0X0CC6, 0X0CC8},
+ {0X0CCA, 0X0CCD},
+ {0X0CD5, 0X0CD6},
+ {0X0CE2, 0X0CE3},
+ {0X0D00, 0X0D03},
+ {0X0D3B, 0X0D3C},
+ {0X0D3E, 0X0D44},
+ {0X0D46, 0X0D48},
+ {0X0D4A, 0X0D4D},
+ {0X0D57, 0X0D57},
+ {0X0D62, 0X0D63},
+ {0X0D82, 0X0D83},
+ {0X0DCA, 0X0DCA},
+ {0X0DCF, 0X0DD4},
+ {0X0DD6, 0X0DD6},
+ {0X0DD8, 0X0DDF},
+ {0X0DF2, 0X0DF3},
+ {0X0E31, 0X0E31},
+ {0X0E34, 0X0E3A},
+ {0X0E47, 0X0E4E},
+ {0X0EB1, 0X0EB1},
+ {0X0EB4, 0X0EBC},
+ {0X0EC8, 0X0ECD},
+ {0X0F18, 0X0F19},
+ {0X0F35, 0X0F35},
+ {0X0F37, 0X0F37},
+ {0X0F39, 0X0F39},
+ {0X0F3E, 0X0F3F},
+ {0X0F71, 0X0F84},
+ {0X0F86, 0X0F87},
+ {0X0F8D, 0X0F97},
+ {0X0F99, 0X0FBC},
+ {0X0FC6, 0X0FC6},
+ {0X102B, 0X103E},
+ {0X1056, 0X1059},
+ {0X105E, 0X1060},
+ {0X1062, 0X1064},
+ {0X1067, 0X106D},
+ {0X1071, 0X1074},
+ {0X1082, 0X108D},
+ {0X108F, 0X108F},
+ {0X109A, 0X109D},
+ {0X135D, 0X135F},
+ {0X1712, 0X1714},
+ {0X1732, 0X1734},
+ {0X1752, 0X1753},
+ {0X1772, 0X1773},
+ {0X17B4, 0X17D3},
+ {0X17DD, 0X17DD},
+ {0X180B, 0X180D},
+ {0X1885, 0X1886},
+ {0X18A9, 0X18A9},
+ {0X1920, 0X192B},
+ {0X1930, 0X193B},
+ {0X1A17, 0X1A1B},
+ {0X1A55, 0X1A5E},
+ {0X1A60, 0X1A7C},
+ {0X1A7F, 0X1A7F},
+ {0X1AB0, 0X1ABE},
+ {0X1B00, 0X1B04},
+ {0X1B34, 0X1B44},
+ {0X1B6B, 0X1B73},
+ {0X1B80, 0X1B82},
+ {0X1BA1, 0X1BAD},
+ {0X1BE6, 0X1BF3},
+ {0X1C24, 0X1C37},
+ {0X1CD0, 0X1CD2},
+ {0X1CD4, 0X1CE8},
+ {0X1CED, 0X1CED},
+ {0X1CF4, 0X1CF4},
+ {0X1CF7, 0X1CF9},
+ {0X1DC0, 0X1DF9},
+ {0X1DFB, 0X1DFF},
+ {0X20D0, 0X20F0},
+ {0X2CEF, 0X2CF1},
+ {0X2D7F, 0X2D7F},
+ {0X2DE0, 0X2DFF},
+ {0X302A, 0X302F},
+ {0X3099, 0X309A},
+ {0XA66F, 0XA672},
+ {0XA674, 0XA67D},
+ {0XA69E, 0XA69F},
+ {0XA6F0, 0XA6F1},
+ {0XA802, 0XA802},
+ {0XA806, 0XA806},
+ {0XA80B, 0XA80B},
+ {0XA823, 0XA827},
+ {0XA880, 0XA881},
+ {0XA8B4, 0XA8C5},
+ {0XA8E0, 0XA8F1},
+ {0XA8FF, 0XA8FF},
+ {0XA926, 0XA92D},
+ {0XA947, 0XA953},
+ {0XA980, 0XA983},
+ {0XA9B3, 0XA9C0},
+ {0XA9E5, 0XA9E5},
+ {0XAA29, 0XAA36},
+ {0XAA43, 0XAA43},
+ {0XAA4C, 0XAA4D},
+ {0XAA7B, 0XAA7D},
+ {0XAAB0, 0XAAB0},
+ {0XAAB2, 0XAAB4},
+ {0XAAB7, 0XAAB8},
+ {0XAABE, 0XAABF},
+ {0XAAC1, 0XAAC1},
+ {0XAAEB, 0XAAEF},
+ {0XAAF5, 0XAAF6},
+ {0XABE3, 0XABEA},
+ {0XABEC, 0XABED},
+ {0XFB1E, 0XFB1E},
+ {0XFE00, 0XFE0F},
+ {0XFE20, 0XFE2F},
+ {0X101FD, 0X101FD},
+ {0X102E0, 0X102E0},
+ {0X10376, 0X1037A},
+ {0X10A01, 0X10A03},
+ {0X10A05, 0X10A06},
+ {0X10A0C, 0X10A0F},
+ {0X10A38, 0X10A3A},
+ {0X10A3F, 0X10A3F},
+ {0X10AE5, 0X10AE6},
+ {0X10D24, 0X10D27},
+ {0X10F46, 0X10F50},
+ {0X11000, 0X11002},
+ {0X11038, 0X11046},
+ {0X1107F, 0X11082},
+ {0X110B0, 0X110BA},
+ {0X11100, 0X11102},
+ {0X11127, 0X11134},
+ {0X11145, 0X11146},
+ {0X11173, 0X11173},
+ {0X11180, 0X11182},
+ {0X111B3, 0X111C0},
+ {0X111C9, 0X111CC},
+ {0X1122C, 0X11237},
+ {0X1123E, 0X1123E},
+ {0X112DF, 0X112EA},
+ {0X11300, 0X11303},
+ {0X1133B, 0X1133C},
+ {0X1133E, 0X11344},
+ {0X11347, 0X11348},
+ {0X1134B, 0X1134D},
+ {0X11357, 0X11357},
+ {0X11362, 0X11363},
+ {0X11366, 0X1136C},
+ {0X11370, 0X11374},
+ {0X11435, 0X11446},
+ {0X1145E, 0X1145E},
+ {0X114B0, 0X114C3},
+ {0X115AF, 0X115B5},
+ {0X115B8, 0X115C0},
+ {0X115DC, 0X115DD},
+ {0X11630, 0X11640},
+ {0X116AB, 0X116B7},
+ {0X1171D, 0X1172B},
+ {0X1182C, 0X1183A},
+ {0X119D1, 0X119D7},
+ {0X119DA, 0X119E0},
+ {0X119E4, 0X119E4},
+ {0X11A01, 0X11A0A},
+ {0X11A33, 0X11A39},
+ {0X11A3B, 0X11A3E},
+ {0X11A47, 0X11A47},
+ {0X11A51, 0X11A5B},
+ {0X11A8A, 0X11A99},
+ {0X11C2F, 0X11C36},
+ {0X11C38, 0X11C3F},
+ {0X11C92, 0X11CA7},
+ {0X11CA9, 0X11CB6},
+ {0X11D31, 0X11D36},
+ {0X11D3A, 0X11D3A},
+ {0X11D3C, 0X11D3D},
+ {0X11D3F, 0X11D45},
+ {0X11D47, 0X11D47},
+ {0X11D8A, 0X11D8E},
+ {0X11D90, 0X11D91},
+ {0X11D93, 0X11D97},
+ {0X11EF3, 0X11EF6},
+ {0X16AF0, 0X16AF4},
+ {0X16B30, 0X16B36},
+ {0X16F4F, 0X16F4F},
+ {0X16F51, 0X16F87},
+ {0X16F8F, 0X16F92},
+ {0X1BC9D, 0X1BC9E},
+ {0X1D165, 0X1D169},
+ {0X1D16D, 0X1D172},
+ {0X1D17B, 0X1D182},
+ {0X1D185, 0X1D18B},
+ {0X1D1AA, 0X1D1AD},
+ {0X1D242, 0X1D244},
+ {0X1DA00, 0X1DA36},
+ {0X1DA3B, 0X1DA6C},
+ {0X1DA75, 0X1DA75},
+ {0X1DA84, 0X1DA84},
+ {0X1DA9B, 0X1DA9F},
+ {0X1DAA1, 0X1DAAF},
+ {0X1E000, 0X1E006},
+ {0X1E008, 0X1E018},
+ {0X1E01B, 0X1E021},
+ {0X1E023, 0X1E024},
+ {0X1E026, 0X1E02A},
+ {0X1E130, 0X1E136},
+ {0X1E2EC, 0X1E2EF},
+ {0X1E8D0, 0X1E8D6},
+ {0X1E944, 0X1E94A},
+ {0XE0100, 0XE01EF}
+};
+#endif
+
+/* auxiliary function for binary search in interval table */
+static int bisearch(uint32_t ucs, const struct interval *table, int max) {
+ int min = 0;
+ int mid;
+
+ if ((int)ucs < table[0].first || (int)ucs > table[max].last)
+ return 0;
+ while (max >= min) {
+ mid = (min + max) / 2;
+ if ((int)ucs > table[mid].last)
+ min = mid + 1;
+ else if ((int)ucs < table[mid].first)
+ max = mid - 1;
+ else
+ return 1;
+ }
+
+ return 0;
+}
+
+
+/* The following two functions define the column width of an ISO 10646
+ * character as follows:
+ *
+ * - The null character (U+0000) has a column width of 0.
+ *
+ * - Other C0/C1 control characters and DEL will lead to a return
+ * value of -1.
+ *
+ * - Non-spacing and enclosing combining characters (general
+ * category code Mn or Me in the Unicode database) have a
+ * column width of 0.
+ *
+ * - SOFT HYPHEN (U+00AD) has a column width of 1.
+ *
+ * - Other format characters (general category code Cf in the Unicode
+ * database) and ZERO WIDTH SPACE (U+200B) have a column width of 0.
+ *
+ * - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF)
+ * have a column width of 0.
+ *
+ * - Spacing characters in the East Asian Wide (W) or East Asian
+ * Full-width (F) category as defined in Unicode Technical
+ * Report #11 have a column width of 2.
+ *
+ * - All remaining characters (including all printable
+ * ISO 8859-1 and WGL4 characters, Unicode control characters,
+ * etc.) have a column width of 1.
+ *
+ * This implementation assumes that uint32_t characters are encoded
+ * in ISO 10646.
+ */
+
+#ifdef WCWIDTH_FUNCTION
+// use a provided wcwidth() function
+int WCWIDTH_FUNCTION(uint32_t ucs);
+#else
+# define WCWIDTH_FUNCTION mk_wcwidth
+
+static int mk_wcwidth(uint32_t ucs)
+{
+ /* test for 8-bit control characters */
+ if (ucs == 0)
+ return 0;
+ if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0))
+ return -1;
+
+ /* binary search in table of non-spacing characters */
+ if (bisearch(ucs, combining,
+ sizeof(combining) / sizeof(struct interval) - 1))
+ return 0;
+
+ /* if we arrive here, ucs is not a combining or C0/C1 control character */
+
+ return 1 +
+ (ucs >= 0x1100 &&
+ (ucs <= 0x115f || /* Hangul Jamo init. consonants */
+ ucs == 0x2329 || ucs == 0x232a ||
+ (ucs >= 0x2e80 && ucs <= 0xa4cf &&
+ ucs != 0x303f) || /* CJK ... Yi */
+ (ucs >= 0xac00 && ucs <= 0xd7a3) || /* Hangul Syllables */
+ (ucs >= 0xf900 && ucs <= 0xfaff) || /* CJK Compatibility Ideographs */
+ (ucs >= 0xfe10 && ucs <= 0xfe19) || /* Vertical forms */
+ (ucs >= 0xfe30 && ucs <= 0xfe6f) || /* CJK Compatibility Forms */
+ (ucs >= 0xff00 && ucs <= 0xff60) || /* Fullwidth Forms */
+ (ucs >= 0xffe0 && ucs <= 0xffe6) ||
+ (ucs >= 0x20000 && ucs <= 0x2fffd) ||
+ (ucs >= 0x30000 && ucs <= 0x3fffd)));
+}
+#endif
+
+/* sorted list of non-overlapping intervals of East Asian Ambiguous
+* characters, generated by "uniset +WIDTH-A -cat=Me -cat=Mn -cat=Cf c" */
+static const struct interval 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 }
+};
+
+#ifdef USE_MK_WCWIDTH_CJK
+
+/*
+ * The following functions are the same as mk_wcwidth() and
+ * mk_wcswidth(), except that spacing characters in the East Asian
+ * Ambiguous (A) category as defined in Unicode Technical Report #11
+ * have a column width of 2. This variant might be useful for users of
+ * CJK legacy encodings who want to migrate to UCS without changing
+ * the traditional terminal character-width behaviour. It is not
+ * otherwise recommended for general use.
+ */
+static int mk_wcwidth_cjk(uint32_t ucs)
+{
+ /* binary search in table of non-spacing characters */
+ if (bisearch(ucs, ambiguous,
+ sizeof(ambiguous) / sizeof(struct interval) - 1))
+ return 2;
+
+ return mk_wcwidth(ucs);
+}
+
+#endif
+
+INTERNAL int vterm_unicode_is_ambiguous(uint32_t codepoint)
+{
+ return (bisearch(codepoint, ambiguous,
+ sizeof(ambiguous) / sizeof(struct interval) - 1)) ? 1 : 0;
+}
+
+#ifdef IS_COMBINING_FUNCTION
+// Use a provided is_combining() function.
+int IS_COMBINING_FUNCTION(uint32_t codepoint);
+#else
+# define IS_COMBINING_FUNCTION vterm_is_combining
+ static int
+vterm_is_combining(uint32_t codepoint)
+{
+ return bisearch(codepoint, combining, sizeof(combining) / sizeof(struct interval) - 1);
+}
+#endif
+
+#ifdef GET_SPECIAL_PTY_TYPE_FUNCTION
+int GET_SPECIAL_PTY_TYPE_FUNCTION(void);
+#else
+# define GET_SPECIAL_PTY_TYPE_FUNCTION vterm_get_special_pty_type_placeholder
+ static int
+vterm_get_special_pty_type_placeholder(void)
+{
+ return 0;
+}
+#endif
+
+// ################################
+// ### The rest added by Paul Evans
+
+static const struct interval fullwidth[] = {
+#include "fullwidth.inc"
+};
+
+INTERNAL int vterm_unicode_width(uint32_t codepoint)
+{
+ if(bisearch(codepoint, fullwidth, sizeof(fullwidth) / sizeof(fullwidth[0]) - 1))
+ return 2;
+
+ return WCWIDTH_FUNCTION(codepoint);
+}
+
+INTERNAL int vterm_unicode_is_combining(uint32_t codepoint)
+{
+ return IS_COMBINING_FUNCTION(codepoint);
+}
+
+INTERNAL int vterm_get_special_pty_type(void)
+{
+ return GET_SPECIAL_PTY_TYPE_FUNCTION();
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-11 08:05:32 +0000