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Diffstat (limited to 'wcwidth.c')
| -rw-r--r-- | wcwidth.c | 558 |
1 files changed, 0 insertions, 558 deletions
diff --git a/wcwidth.c b/wcwidth.c deleted file mode 100644 index 6468fedd..00000000 --- a/wcwidth.c +++ /dev/null @@ -1,558 +0,0 @@ -/* - * 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 "uniset +cat=Me +cat=Mn +cat=Cf -00AD +1160-11FF +200B c" */ - static const struct interval combining[] = { - { 0x0300, 0x036F }, { 0x0483, 0x0486 }, { 0x0488, 0x0489 }, - { 0x0591, 0x05BD }, { 0x05BF, 0x05BF }, { 0x05C1, 0x05C2 }, - { 0x05C4, 0x05C5 }, { 0x05C7, 0x05C7 }, { 0x0600, 0x0603 }, - { 0x0610, 0x0615 }, { 0x064B, 0x065E }, { 0x0670, 0x0670 }, - { 0x06D6, 0x06E4 }, { 0x06E7, 0x06E8 }, { 0x06EA, 0x06ED }, - { 0x070F, 0x070F }, { 0x0711, 0x0711 }, { 0x0730, 0x074A }, - { 0x07A6, 0x07B0 }, { 0x07EB, 0x07F3 }, { 0x0901, 0x0902 }, - { 0x093C, 0x093C }, { 0x0941, 0x0948 }, { 0x094D, 0x094D }, - { 0x0951, 0x0954 }, { 0x0962, 0x0963 }, { 0x0981, 0x0981 }, - { 0x09BC, 0x09BC }, { 0x09C1, 0x09C4 }, { 0x09CD, 0x09CD }, - { 0x09E2, 0x09E3 }, { 0x0A01, 0x0A02 }, { 0x0A3C, 0x0A3C }, - { 0x0A41, 0x0A42 }, { 0x0A47, 0x0A48 }, { 0x0A4B, 0x0A4D }, - { 0x0A70, 0x0A71 }, { 0x0A81, 0x0A82 }, { 0x0ABC, 0x0ABC }, - { 0x0AC1, 0x0AC5 }, { 0x0AC7, 0x0AC8 }, { 0x0ACD, 0x0ACD }, - { 0x0AE2, 0x0AE3 }, { 0x0B01, 0x0B01 }, { 0x0B3C, 0x0B3C }, - { 0x0B3F, 0x0B3F }, { 0x0B41, 0x0B43 }, { 0x0B4D, 0x0B4D }, - { 0x0B56, 0x0B56 }, { 0x0B82, 0x0B82 }, { 0x0BC0, 0x0BC0 }, - { 0x0BCD, 0x0BCD }, { 0x0C3E, 0x0C40 }, { 0x0C46, 0x0C48 }, - { 0x0C4A, 0x0C4D }, { 0x0C55, 0x0C56 }, { 0x0CBC, 0x0CBC }, - { 0x0CBF, 0x0CBF }, { 0x0CC6, 0x0CC6 }, { 0x0CCC, 0x0CCD }, - { 0x0CE2, 0x0CE3 }, { 0x0D41, 0x0D43 }, { 0x0D4D, 0x0D4D }, - { 0x0DCA, 0x0DCA }, { 0x0DD2, 0x0DD4 }, { 0x0DD6, 0x0DD6 }, - { 0x0E31, 0x0E31 }, { 0x0E34, 0x0E3A }, { 0x0E47, 0x0E4E }, - { 0x0EB1, 0x0EB1 }, { 0x0EB4, 0x0EB9 }, { 0x0EBB, 0x0EBC }, - { 0x0EC8, 0x0ECD }, { 0x0F18, 0x0F19 }, { 0x0F35, 0x0F35 }, - { 0x0F37, 0x0F37 }, { 0x0F39, 0x0F39 }, { 0x0F71, 0x0F7E }, - { 0x0F80, 0x0F84 }, { 0x0F86, 0x0F87 }, { 0x0F90, 0x0F97 }, - { 0x0F99, 0x0FBC }, { 0x0FC6, 0x0FC6 }, { 0x102D, 0x1030 }, - { 0x1032, 0x1032 }, { 0x1036, 0x1037 }, { 0x1039, 0x1039 }, - { 0x1058, 0x1059 }, { 0x1160, 0x11FF }, { 0x135F, 0x135F }, - { 0x1712, 0x1714 }, { 0x1732, 0x1734 }, { 0x1752, 0x1753 }, - { 0x1772, 0x1773 }, { 0x17B4, 0x17B5 }, { 0x17B7, 0x17BD }, - { 0x17C6, 0x17C6 }, { 0x17C9, 0x17D3 }, { 0x17DD, 0x17DD }, - { 0x180B, 0x180D }, { 0x18A9, 0x18A9 }, { 0x1920, 0x1922 }, - { 0x1927, 0x1928 }, { 0x1932, 0x1932 }, { 0x1939, 0x193B }, - { 0x1A17, 0x1A18 }, { 0x1B00, 0x1B03 }, { 0x1B34, 0x1B34 }, - { 0x1B36, 0x1B3A }, { 0x1B3C, 0x1B3C }, { 0x1B42, 0x1B42 }, - { 0x1B6B, 0x1B73 }, { 0x1DC0, 0x1DCA }, { 0x1DFE, 0x1DFF }, - { 0x200B, 0x200F }, { 0x202A, 0x202E }, { 0x2060, 0x2063 }, - { 0x206A, 0x206F }, { 0x20D0, 0x20EF }, { 0x302A, 0x302F }, - { 0x3099, 0x309A }, { 0xA806, 0xA806 }, { 0xA80B, 0xA80B }, - { 0xA825, 0xA826 }, { 0xFB1E, 0xFB1E }, { 0xFE00, 0xFE0F }, - { 0xFE20, 0xFE23 }, { 0xFEFF, 0xFEFF }, { 0xFFF9, 0xFFFB }, - { 0x10A01, 0x10A03 }, { 0x10A05, 0x10A06 }, { 0x10A0C, 0x10A0F }, - { 0x10A38, 0x10A3A }, { 0x10A3F, 0x10A3F }, { 0x1D167, 0x1D169 }, - { 0x1D173, 0x1D182 }, { 0x1D185, 0x1D18B }, { 0x1D1AA, 0x1D1AD }, - { 0x1D242, 0x1D244 }, { 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 9.0.0 data files available at: - * https://www.unicode.org/Public/13.0.0/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}, - {0x1B000, 0x1B11E}, - {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}, - {0x1F6EB, 0x1F6EC}, - {0x1F6F4, 0x1F6FC}, - {0x1F7E0, 0x1F7EB}, - {0x1F90C, 0x1F93A}, - {0x1F93C, 0x1F945}, - {0x1F947, 0x1F978}, - {0x1F97A, 0x1F9CB}, - {0x1F9CD, 0x1F9FF}, - {0x1FA70, 0x1FA74}, - {0x1FA78, 0x1FA7A}, - {0x1FA80, 0x1FA86}, - {0x1FA90, 0x1FAA8}, - {0x1FAB0, 0x1FAB6}, - {0x1FAC0, 0x1FAC2}, - {0x1FAD0, 0x1FAD6}, - {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; -} |