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Diffstat (limited to 'utils/wcwidth.c')
| -rw-r--r-- | utils/wcwidth.c | 887 |
1 files changed, 887 insertions, 0 deletions
diff --git a/utils/wcwidth.c b/utils/wcwidth.c new file mode 100644 index 00000000..7705d984 --- /dev/null +++ b/utils/wcwidth.c @@ -0,0 +1,887 @@ +/* + * 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 + */ + +#include <wchar.h> + +#include "putty.h" /* for prototypes */ + +struct interval { + unsigned int first; + unsigned int last; +}; + +/* auxiliary function for binary search in interval table */ +static bool bisearch(unsigned int ucs, const struct interval *table, int max) { + int min = 0; + int mid; + + if (ucs < table[0].first || ucs > table[max].last) + return false; + while (max >= min) { + mid = (min + max) / 2; + if (ucs > table[mid].last) + min = mid + 1; + else if (ucs < table[mid].first) + max = mid - 1; + else + return true; + } + + return false; +} + + +/* 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 wchar_t characters are encoded + * in ISO 10646. + */ + +int mk_wcwidth(unsigned int ucs) +{ + /* sorted list of non-overlapping intervals of non-spacing characters */ + /* generated by the following Perl + * from the Unicode 14.0.0 data files available at: + * https://www.unicode.org/Public/14.0.0/ucd/ + +open DATA, "<", "UnicodeData.txt" || die "$!"; +while (<DATA>) { + @fields = split /;/; + $chr = hex $fields[0]; + $cat = $fields[2]; + $include = ($cat eq "Me" || $cat eq "Mn" || $cat eq "Cf"); + $include = 0 if ($chr == 0x00AD); + $include = 1 if (0x1160 <= $chr && $chr <= 0x11FF); + $include = 1 if ($chr == 0x200B); + $chrs{$chr} = $include; +} +close DATA; +for ($chr = 0; $chr < 0x110000; $chr++) { + if ($chrs{$chr}) { + $start = $chr; + $chr++ while $chrs{$chr}; + printf " { 0x%04X, 0x%04X },\n", $start, $chr-1; + } +} + + */ + static const struct interval combining[] = { + { 0x0300, 0x036F }, + { 0x0483, 0x0489 }, + { 0x0591, 0x05BD }, + { 0x05BF, 0x05BF }, + { 0x05C1, 0x05C2 }, + { 0x05C4, 0x05C5 }, + { 0x05C7, 0x05C7 }, + { 0x0600, 0x0605 }, + { 0x0610, 0x061A }, + { 0x061C, 0x061C }, + { 0x064B, 0x065F }, + { 0x0670, 0x0670 }, + { 0x06D6, 0x06DD }, + { 0x06DF, 0x06E4 }, + { 0x06E7, 0x06E8 }, + { 0x06EA, 0x06ED }, + { 0x070F, 0x070F }, + { 0x0711, 0x0711 }, + { 0x0730, 0x074A }, + { 0x07A6, 0x07B0 }, + { 0x07EB, 0x07F3 }, + { 0x07FD, 0x07FD }, + { 0x0816, 0x0819 }, + { 0x081B, 0x0823 }, + { 0x0825, 0x0827 }, + { 0x0829, 0x082D }, + { 0x0859, 0x085B }, + { 0x0890, 0x0891 }, + { 0x0898, 0x089F }, + { 0x08CA, 0x0902 }, + { 0x093A, 0x093A }, + { 0x093C, 0x093C }, + { 0x0941, 0x0948 }, + { 0x094D, 0x094D }, + { 0x0951, 0x0957 }, + { 0x0962, 0x0963 }, + { 0x0981, 0x0981 }, + { 0x09BC, 0x09BC }, + { 0x09C1, 0x09C4 }, + { 0x09CD, 0x09CD }, + { 0x09E2, 0x09E3 }, + { 0x09FE, 0x09FE }, + { 0x0A01, 0x0A02 }, + { 0x0A3C, 0x0A3C }, + { 0x0A41, 0x0A42 }, + { 0x0A47, 0x0A48 }, + { 0x0A4B, 0x0A4D }, + { 0x0A51, 0x0A51 }, + { 0x0A70, 0x0A71 }, + { 0x0A75, 0x0A75 }, + { 0x0A81, 0x0A82 }, + { 0x0ABC, 0x0ABC }, + { 0x0AC1, 0x0AC5 }, + { 0x0AC7, 0x0AC8 }, + { 0x0ACD, 0x0ACD }, + { 0x0AE2, 0x0AE3 }, + { 0x0AFA, 0x0AFF }, + { 0x0B01, 0x0B01 }, + { 0x0B3C, 0x0B3C }, + { 0x0B3F, 0x0B3F }, + { 0x0B41, 0x0B44 }, + { 0x0B4D, 0x0B4D }, + { 0x0B55, 0x0B56 }, + { 0x0B62, 0x0B63 }, + { 0x0B82, 0x0B82 }, + { 0x0BC0, 0x0BC0 }, + { 0x0BCD, 0x0BCD }, + { 0x0C00, 0x0C00 }, + { 0x0C04, 0x0C04 }, + { 0x0C3C, 0x0C3C }, + { 0x0C3E, 0x0C40 }, + { 0x0C46, 0x0C48 }, + { 0x0C4A, 0x0C4D }, + { 0x0C55, 0x0C56 }, + { 0x0C62, 0x0C63 }, + { 0x0C81, 0x0C81 }, + { 0x0CBC, 0x0CBC }, + { 0x0CBF, 0x0CBF }, + { 0x0CC6, 0x0CC6 }, + { 0x0CCC, 0x0CCD }, + { 0x0CE2, 0x0CE3 }, + { 0x0D00, 0x0D01 }, + { 0x0D3B, 0x0D3C }, + { 0x0D41, 0x0D44 }, + { 0x0D4D, 0x0D4D }, + { 0x0D62, 0x0D63 }, + { 0x0D81, 0x0D81 }, + { 0x0DCA, 0x0DCA }, + { 0x0DD2, 0x0DD4 }, + { 0x0DD6, 0x0DD6 }, + { 0x0E31, 0x0E31 }, + { 0x0E34, 0x0E3A }, + { 0x0E47, 0x0E4E }, + { 0x0EB1, 0x0EB1 }, + { 0x0EB4, 0x0EBC }, + { 0x0EC8, 0x0ECD }, + { 0x0F18, 0x0F19 }, + { 0x0F35, 0x0F35 }, + { 0x0F37, 0x0F37 }, + { 0x0F39, 0x0F39 }, + { 0x0F71, 0x0F7E }, + { 0x0F80, 0x0F84 }, + { 0x0F86, 0x0F87 }, + { 0x0F8D, 0x0F97 }, + { 0x0F99, 0x0FBC }, + { 0x0FC6, 0x0FC6 }, + { 0x102D, 0x1030 }, + { 0x1032, 0x1037 }, + { 0x1039, 0x103A }, + { 0x103D, 0x103E }, + { 0x1058, 0x1059 }, + { 0x105E, 0x1060 }, + { 0x1071, 0x1074 }, + { 0x1082, 0x1082 }, + { 0x1085, 0x1086 }, + { 0x108D, 0x108D }, + { 0x109D, 0x109D }, + { 0x1160, 0x11FF }, + { 0x135D, 0x135F }, + { 0x1712, 0x1714 }, + { 0x1732, 0x1733 }, + { 0x1752, 0x1753 }, + { 0x1772, 0x1773 }, + { 0x17B4, 0x17B5 }, + { 0x17B7, 0x17BD }, + { 0x17C6, 0x17C6 }, + { 0x17C9, 0x17D3 }, + { 0x17DD, 0x17DD }, + { 0x180B, 0x180F }, + { 0x1885, 0x1886 }, + { 0x18A9, 0x18A9 }, + { 0x1920, 0x1922 }, + { 0x1927, 0x1928 }, + { 0x1932, 0x1932 }, + { 0x1939, 0x193B }, + { 0x1A17, 0x1A18 }, + { 0x1A1B, 0x1A1B }, + { 0x1A56, 0x1A56 }, + { 0x1A58, 0x1A5E }, + { 0x1A60, 0x1A60 }, + { 0x1A62, 0x1A62 }, + { 0x1A65, 0x1A6C }, + { 0x1A73, 0x1A7C }, + { 0x1A7F, 0x1A7F }, + { 0x1AB0, 0x1ACE }, + { 0x1B00, 0x1B03 }, + { 0x1B34, 0x1B34 }, + { 0x1B36, 0x1B3A }, + { 0x1B3C, 0x1B3C }, + { 0x1B42, 0x1B42 }, + { 0x1B6B, 0x1B73 }, + { 0x1B80, 0x1B81 }, + { 0x1BA2, 0x1BA5 }, + { 0x1BA8, 0x1BA9 }, + { 0x1BAB, 0x1BAD }, + { 0x1BE6, 0x1BE6 }, + { 0x1BE8, 0x1BE9 }, + { 0x1BED, 0x1BED }, + { 0x1BEF, 0x1BF1 }, + { 0x1C2C, 0x1C33 }, + { 0x1C36, 0x1C37 }, + { 0x1CD0, 0x1CD2 }, + { 0x1CD4, 0x1CE0 }, + { 0x1CE2, 0x1CE8 }, + { 0x1CED, 0x1CED }, + { 0x1CF4, 0x1CF4 }, + { 0x1CF8, 0x1CF9 }, + { 0x1DC0, 0x1DFF }, + { 0x200B, 0x200F }, + { 0x202A, 0x202E }, + { 0x2060, 0x2064 }, + { 0x2066, 0x206F }, + { 0x20D0, 0x20F0 }, + { 0x2CEF, 0x2CF1 }, + { 0x2D7F, 0x2D7F }, + { 0x2DE0, 0x2DFF }, + { 0x302A, 0x302D }, + { 0x3099, 0x309A }, + { 0xA66F, 0xA672 }, + { 0xA674, 0xA67D }, + { 0xA69E, 0xA69F }, + { 0xA6F0, 0xA6F1 }, + { 0xA802, 0xA802 }, + { 0xA806, 0xA806 }, + { 0xA80B, 0xA80B }, + { 0xA825, 0xA826 }, + { 0xA82C, 0xA82C }, + { 0xA8C4, 0xA8C5 }, + { 0xA8E0, 0xA8F1 }, + { 0xA8FF, 0xA8FF }, + { 0xA926, 0xA92D }, + { 0xA947, 0xA951 }, + { 0xA980, 0xA982 }, + { 0xA9B3, 0xA9B3 }, + { 0xA9B6, 0xA9B9 }, + { 0xA9BC, 0xA9BD }, + { 0xA9E5, 0xA9E5 }, + { 0xAA29, 0xAA2E }, + { 0xAA31, 0xAA32 }, + { 0xAA35, 0xAA36 }, + { 0xAA43, 0xAA43 }, + { 0xAA4C, 0xAA4C }, + { 0xAA7C, 0xAA7C }, + { 0xAAB0, 0xAAB0 }, + { 0xAAB2, 0xAAB4 }, + { 0xAAB7, 0xAAB8 }, + { 0xAABE, 0xAABF }, + { 0xAAC1, 0xAAC1 }, + { 0xAAEC, 0xAAED }, + { 0xAAF6, 0xAAF6 }, + { 0xABE5, 0xABE5 }, + { 0xABE8, 0xABE8 }, + { 0xABED, 0xABED }, + { 0xFB1E, 0xFB1E }, + { 0xFE00, 0xFE0F }, + { 0xFE20, 0xFE2F }, + { 0xFEFF, 0xFEFF }, + { 0xFFF9, 0xFFFB }, + { 0x101FD, 0x101FD }, + { 0x102E0, 0x102E0 }, + { 0x10376, 0x1037A }, + { 0x10A01, 0x10A03 }, + { 0x10A05, 0x10A06 }, + { 0x10A0C, 0x10A0F }, + { 0x10A38, 0x10A3A }, + { 0x10A3F, 0x10A3F }, + { 0x10AE5, 0x10AE6 }, + { 0x10D24, 0x10D27 }, + { 0x10EAB, 0x10EAC }, + { 0x10F46, 0x10F50 }, + { 0x10F82, 0x10F85 }, + { 0x11001, 0x11001 }, + { 0x11038, 0x11046 }, + { 0x11070, 0x11070 }, + { 0x11073, 0x11074 }, + { 0x1107F, 0x11081 }, + { 0x110B3, 0x110B6 }, + { 0x110B9, 0x110BA }, + { 0x110BD, 0x110BD }, + { 0x110C2, 0x110C2 }, + { 0x110CD, 0x110CD }, + { 0x11100, 0x11102 }, + { 0x11127, 0x1112B }, + { 0x1112D, 0x11134 }, + { 0x11173, 0x11173 }, + { 0x11180, 0x11181 }, + { 0x111B6, 0x111BE }, + { 0x111C9, 0x111CC }, + { 0x111CF, 0x111CF }, + { 0x1122F, 0x11231 }, + { 0x11234, 0x11234 }, + { 0x11236, 0x11237 }, + { 0x1123E, 0x1123E }, + { 0x112DF, 0x112DF }, + { 0x112E3, 0x112EA }, + { 0x11300, 0x11301 }, + { 0x1133B, 0x1133C }, + { 0x11340, 0x11340 }, + { 0x11366, 0x1136C }, + { 0x11370, 0x11374 }, + { 0x11438, 0x1143F }, + { 0x11442, 0x11444 }, + { 0x11446, 0x11446 }, + { 0x1145E, 0x1145E }, + { 0x114B3, 0x114B8 }, + { 0x114BA, 0x114BA }, + { 0x114BF, 0x114C0 }, + { 0x114C2, 0x114C3 }, + { 0x115B2, 0x115B5 }, + { 0x115BC, 0x115BD }, + { 0x115BF, 0x115C0 }, + { 0x115DC, 0x115DD }, + { 0x11633, 0x1163A }, + { 0x1163D, 0x1163D }, + { 0x1163F, 0x11640 }, + { 0x116AB, 0x116AB }, + { 0x116AD, 0x116AD }, + { 0x116B0, 0x116B5 }, + { 0x116B7, 0x116B7 }, + { 0x1171D, 0x1171F }, + { 0x11722, 0x11725 }, + { 0x11727, 0x1172B }, + { 0x1182F, 0x11837 }, + { 0x11839, 0x1183A }, + { 0x1193B, 0x1193C }, + { 0x1193E, 0x1193E }, + { 0x11943, 0x11943 }, + { 0x119D4, 0x119D7 }, + { 0x119DA, 0x119DB }, + { 0x119E0, 0x119E0 }, + { 0x11A01, 0x11A0A }, + { 0x11A33, 0x11A38 }, + { 0x11A3B, 0x11A3E }, + { 0x11A47, 0x11A47 }, + { 0x11A51, 0x11A56 }, + { 0x11A59, 0x11A5B }, + { 0x11A8A, 0x11A96 }, + { 0x11A98, 0x11A99 }, + { 0x11C30, 0x11C36 }, + { 0x11C38, 0x11C3D }, + { 0x11C3F, 0x11C3F }, + { 0x11C92, 0x11CA7 }, + { 0x11CAA, 0x11CB0 }, + { 0x11CB2, 0x11CB3 }, + { 0x11CB5, 0x11CB6 }, + { 0x11D31, 0x11D36 }, + { 0x11D3A, 0x11D3A }, + { 0x11D3C, 0x11D3D }, + { 0x11D3F, 0x11D45 }, + { 0x11D47, 0x11D47 }, + { 0x11D90, 0x11D91 }, + { 0x11D95, 0x11D95 }, + { 0x11D97, 0x11D97 }, + { 0x11EF3, 0x11EF4 }, + { 0x13430, 0x13438 }, + { 0x16AF0, 0x16AF4 }, + { 0x16B30, 0x16B36 }, + { 0x16F4F, 0x16F4F }, + { 0x16F8F, 0x16F92 }, + { 0x16FE4, 0x16FE4 }, + { 0x1BC9D, 0x1BC9E }, + { 0x1BCA0, 0x1BCA3 }, + { 0x1CF00, 0x1CF2D }, + { 0x1CF30, 0x1CF46 }, + { 0x1D167, 0x1D169 }, + { 0x1D173, 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 }, + { 0x1E2AE, 0x1E2AE }, + { 0x1E2EC, 0x1E2EF }, + { 0x1E8D0, 0x1E8D6 }, + { 0x1E944, 0x1E94A }, + { 0xE0001, 0xE0001 }, + { 0xE0020, 0xE007F }, + { 0xE0100, 0xE01EF }, + }; + + /* A sorted list of intervals of double-width characters generated by: + * https://raw.githubusercontent.com/GNOME/glib/37d4c2941bd0326b8b6e6bb22c81bd424fcc040b/glib/gen-unicode-tables.pl + * from the Unicode 14.0.0 data files available at: + * https://www.unicode.org/Public/14.0.0/ucd/ + */ + static const struct interval wide[] = { + {0x1100, 0x115F}, + {0x231A, 0x231B}, + {0x2329, 0x232A}, + {0x23E9, 0x23EC}, + {0x23F0, 0x23F0}, + {0x23F3, 0x23F3}, + {0x25FD, 0x25FE}, + {0x2614, 0x2615}, + {0x2648, 0x2653}, + {0x267F, 0x267F}, + {0x2693, 0x2693}, + {0x26A1, 0x26A1}, + {0x26AA, 0x26AB}, + {0x26BD, 0x26BE}, + {0x26C4, 0x26C5}, + {0x26CE, 0x26CE}, + {0x26D4, 0x26D4}, + {0x26EA, 0x26EA}, + {0x26F2, 0x26F3}, + {0x26F5, 0x26F5}, + {0x26FA, 0x26FA}, + {0x26FD, 0x26FD}, + {0x2705, 0x2705}, + {0x270A, 0x270B}, + {0x2728, 0x2728}, + {0x274C, 0x274C}, + {0x274E, 0x274E}, + {0x2753, 0x2755}, + {0x2757, 0x2757}, + {0x2795, 0x2797}, + {0x27B0, 0x27B0}, + {0x27BF, 0x27BF}, + {0x2B1B, 0x2B1C}, + {0x2B50, 0x2B50}, + {0x2B55, 0x2B55}, + {0x2E80, 0x2E99}, + {0x2E9B, 0x2EF3}, + {0x2F00, 0x2FD5}, + {0x2FF0, 0x2FFB}, + {0x3000, 0x303E}, + {0x3041, 0x3096}, + {0x3099, 0x30FF}, + {0x3105, 0x312F}, + {0x3131, 0x318E}, + {0x3190, 0x31E3}, + {0x31F0, 0x321E}, + {0x3220, 0x3247}, + {0x3250, 0x4DBF}, + {0x4E00, 0xA48C}, + {0xA490, 0xA4C6}, + {0xA960, 0xA97C}, + {0xAC00, 0xD7A3}, + {0xF900, 0xFAFF}, + {0xFE10, 0xFE19}, + {0xFE30, 0xFE52}, + {0xFE54, 0xFE66}, + {0xFE68, 0xFE6B}, + {0xFF01, 0xFF60}, + {0xFFE0, 0xFFE6}, + {0x16FE0, 0x16FE4}, + {0x16FF0, 0x16FF1}, + {0x17000, 0x187F7}, + {0x18800, 0x18CD5}, + {0x18D00, 0x18D08}, + {0x1AFF0, 0x1AFF3}, + {0x1AFF5, 0x1AFFB}, + {0x1AFFD, 0x1AFFE}, + {0x1B000, 0x1B122}, + {0x1B150, 0x1B152}, + {0x1B164, 0x1B167}, + {0x1B170, 0x1B2FB}, + {0x1F004, 0x1F004}, + {0x1F0CF, 0x1F0CF}, + {0x1F18E, 0x1F18E}, + {0x1F191, 0x1F19A}, + {0x1F200, 0x1F202}, + {0x1F210, 0x1F23B}, + {0x1F240, 0x1F248}, + {0x1F250, 0x1F251}, + {0x1F260, 0x1F265}, + {0x1F300, 0x1F320}, + {0x1F32D, 0x1F335}, + {0x1F337, 0x1F37C}, + {0x1F37E, 0x1F393}, + {0x1F3A0, 0x1F3CA}, + {0x1F3CF, 0x1F3D3}, + {0x1F3E0, 0x1F3F0}, + {0x1F3F4, 0x1F3F4}, + {0x1F3F8, 0x1F43E}, + {0x1F440, 0x1F440}, + {0x1F442, 0x1F4FC}, + {0x1F4FF, 0x1F53D}, + {0x1F54B, 0x1F54E}, + {0x1F550, 0x1F567}, + {0x1F57A, 0x1F57A}, + {0x1F595, 0x1F596}, + {0x1F5A4, 0x1F5A4}, + {0x1F5FB, 0x1F64F}, + {0x1F680, 0x1F6C5}, + {0x1F6CC, 0x1F6CC}, + {0x1F6D0, 0x1F6D2}, + {0x1F6D5, 0x1F6D7}, + {0x1F6DD, 0x1F6DF}, + {0x1F6EB, 0x1F6EC}, + {0x1F6F4, 0x1F6FC}, + {0x1F7E0, 0x1F7EB}, + {0x1F7F0, 0x1F7F0}, + {0x1F90C, 0x1F93A}, + {0x1F93C, 0x1F945}, + {0x1F947, 0x1F9FF}, + {0x1FA70, 0x1FA74}, + {0x1FA78, 0x1FA7C}, + {0x1FA80, 0x1FA86}, + {0x1FA90, 0x1FAAC}, + {0x1FAB0, 0x1FABA}, + {0x1FAC0, 0x1FAC5}, + {0x1FAD0, 0x1FAD9}, + {0x1FAE0, 0x1FAE7}, + {0x1FAF0, 0x1FAF6}, + {0x20000, 0x2FFFD}, + {0x30000, 0x3FFFD}, + }; + + /* 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 */ + + /* binary search in table of double-width characters */ + if (bisearch(ucs, wide, + sizeof(wide) / sizeof(struct interval) - 1)) + return 2; + + /* normal width character */ + return 1; +} + + +int mk_wcswidth(const unsigned int *pwcs, size_t n) +{ + int w, width = 0; + + for (;*pwcs && n-- > 0; pwcs++) + if ((w = mk_wcwidth(*pwcs)) < 0) + return -1; + else + width += w; + + return width; +} + + +/* + * 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. + */ +int mk_wcwidth_cjk(unsigned int ucs) +{ + /* A sorted list of intervals of ambiguous width characters generated by: + * https://raw.githubusercontent.com/GNOME/glib/37d4c2941bd0326b8b6e6bb22c81bd424fcc040b/glib/gen-unicode-tables.pl + * from the Unicode 9.0.0 data files available at: + * http://www.unicode.org/Public/9.0.0/ucd/ + */ + static const struct interval ambiguous[] = { + {0x00A1, 0x00A1}, + {0x00A4, 0x00A4}, + {0x00A7, 0x00A8}, + {0x00AA, 0x00AA}, + {0x00AD, 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}, + {0x0300, 0x036F}, + {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}, + {0x2189, 0x2189}, + {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}, + {0x261C, 0x261C}, + {0x261E, 0x261E}, + {0x2640, 0x2640}, + {0x2642, 0x2642}, + {0x2660, 0x2661}, + {0x2663, 0x2665}, + {0x2667, 0x266A}, + {0x266C, 0x266D}, + {0x266F, 0x266F}, + {0x269E, 0x269F}, + {0x26BF, 0x26BF}, + {0x26C6, 0x26CD}, + {0x26CF, 0x26D3}, + {0x26D5, 0x26E1}, + {0x26E3, 0x26E3}, + {0x26E8, 0x26E9}, + {0x26EB, 0x26F1}, + {0x26F4, 0x26F4}, + {0x26F6, 0x26F9}, + {0x26FB, 0x26FC}, + {0x26FE, 0x26FF}, + {0x273D, 0x273D}, + {0x2776, 0x277F}, + {0x2B56, 0x2B59}, + {0x3248, 0x324F}, + {0xE000, 0xF8FF}, + {0xFE00, 0xFE0F}, + {0xFFFD, 0xFFFD}, + {0x1F100, 0x1F10A}, + {0x1F110, 0x1F12D}, + {0x1F130, 0x1F169}, + {0x1F170, 0x1F18D}, + {0x1F18F, 0x1F190}, + {0x1F19B, 0x1F1AC}, + {0xE0100, 0xE01EF}, + {0xF0000, 0xFFFFD}, + {0x100000, 0x10FFFD}, + }; + + /* binary search in table of non-spacing characters */ + if (bisearch(ucs, ambiguous, + sizeof(ambiguous) / sizeof(struct interval) - 1)) + return 2; + + return mk_wcwidth(ucs); +} + + +int mk_wcswidth_cjk(const unsigned int *pwcs, size_t n) +{ + int w, width = 0; + + for (;*pwcs && n-- > 0; pwcs++) + if ((w = mk_wcwidth_cjk(*pwcs)) < 0) + return -1; + else + width += w; + + return width; +} |