| /* |
| * Copyright (c) 2002-2016, the original author or authors. |
| * |
| * This software is distributable under the BSD license. See the terms of the |
| * BSD license in the documentation provided with this software. |
| * |
| * https://opensource.org/licenses/BSD-3-Clause |
| */ |
| package jdk.internal.org.jline.utils; |
| |
| public final class WCWidth { |
| |
| private WCWidth() { |
| } |
| |
| /* 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. |
| */ |
| public static int wcwidth(int 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, combining.length - 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))) ? 1 : 0); |
| } |
| |
| /* 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 Interval[] combining = { |
| new Interval( 0x0300, 0x036F ), new Interval( 0x0483, 0x0486 ), new Interval( 0x0488, 0x0489 ), |
| new Interval( 0x0591, 0x05BD ), new Interval( 0x05BF, 0x05BF ), new Interval( 0x05C1, 0x05C2 ), |
| new Interval( 0x05C4, 0x05C5 ), new Interval( 0x05C7, 0x05C7 ), new Interval( 0x0600, 0x0603 ), |
| new Interval( 0x0610, 0x0615 ), new Interval( 0x064B, 0x065E ), new Interval( 0x0670, 0x0670 ), |
| new Interval( 0x06D6, 0x06E4 ), new Interval( 0x06E7, 0x06E8 ), new Interval( 0x06EA, 0x06ED ), |
| new Interval( 0x070F, 0x070F ), new Interval( 0x0711, 0x0711 ), new Interval( 0x0730, 0x074A ), |
| new Interval( 0x07A6, 0x07B0 ), new Interval( 0x07EB, 0x07F3 ), new Interval( 0x0901, 0x0902 ), |
| new Interval( 0x093C, 0x093C ), new Interval( 0x0941, 0x0948 ), new Interval( 0x094D, 0x094D ), |
| new Interval( 0x0951, 0x0954 ), new Interval( 0x0962, 0x0963 ), new Interval( 0x0981, 0x0981 ), |
| new Interval( 0x09BC, 0x09BC ), new Interval( 0x09C1, 0x09C4 ), new Interval( 0x09CD, 0x09CD ), |
| new Interval( 0x09E2, 0x09E3 ), new Interval( 0x0A01, 0x0A02 ), new Interval( 0x0A3C, 0x0A3C ), |
| new Interval( 0x0A41, 0x0A42 ), new Interval( 0x0A47, 0x0A48 ), new Interval( 0x0A4B, 0x0A4D ), |
| new Interval( 0x0A70, 0x0A71 ), new Interval( 0x0A81, 0x0A82 ), new Interval( 0x0ABC, 0x0ABC ), |
| new Interval( 0x0AC1, 0x0AC5 ), new Interval( 0x0AC7, 0x0AC8 ), new Interval( 0x0ACD, 0x0ACD ), |
| new Interval( 0x0AE2, 0x0AE3 ), new Interval( 0x0B01, 0x0B01 ), new Interval( 0x0B3C, 0x0B3C ), |
| new Interval( 0x0B3F, 0x0B3F ), new Interval( 0x0B41, 0x0B43 ), new Interval( 0x0B4D, 0x0B4D ), |
| new Interval( 0x0B56, 0x0B56 ), new Interval( 0x0B82, 0x0B82 ), new Interval( 0x0BC0, 0x0BC0 ), |
| new Interval( 0x0BCD, 0x0BCD ), new Interval( 0x0C3E, 0x0C40 ), new Interval( 0x0C46, 0x0C48 ), |
| new Interval( 0x0C4A, 0x0C4D ), new Interval( 0x0C55, 0x0C56 ), new Interval( 0x0CBC, 0x0CBC ), |
| new Interval( 0x0CBF, 0x0CBF ), new Interval( 0x0CC6, 0x0CC6 ), new Interval( 0x0CCC, 0x0CCD ), |
| new Interval( 0x0CE2, 0x0CE3 ), new Interval( 0x0D41, 0x0D43 ), new Interval( 0x0D4D, 0x0D4D ), |
| new Interval( 0x0DCA, 0x0DCA ), new Interval( 0x0DD2, 0x0DD4 ), new Interval( 0x0DD6, 0x0DD6 ), |
| new Interval( 0x0E31, 0x0E31 ), new Interval( 0x0E34, 0x0E3A ), new Interval( 0x0E47, 0x0E4E ), |
| new Interval( 0x0EB1, 0x0EB1 ), new Interval( 0x0EB4, 0x0EB9 ), new Interval( 0x0EBB, 0x0EBC ), |
| new Interval( 0x0EC8, 0x0ECD ), new Interval( 0x0F18, 0x0F19 ), new Interval( 0x0F35, 0x0F35 ), |
| new Interval( 0x0F37, 0x0F37 ), new Interval( 0x0F39, 0x0F39 ), new Interval( 0x0F71, 0x0F7E ), |
| new Interval( 0x0F80, 0x0F84 ), new Interval( 0x0F86, 0x0F87 ), new Interval( 0x0F90, 0x0F97 ), |
| new Interval( 0x0F99, 0x0FBC ), new Interval( 0x0FC6, 0x0FC6 ), new Interval( 0x102D, 0x1030 ), |
| new Interval( 0x1032, 0x1032 ), new Interval( 0x1036, 0x1037 ), new Interval( 0x1039, 0x1039 ), |
| new Interval( 0x1058, 0x1059 ), new Interval( 0x1160, 0x11FF ), new Interval( 0x135F, 0x135F ), |
| new Interval( 0x1712, 0x1714 ), new Interval( 0x1732, 0x1734 ), new Interval( 0x1752, 0x1753 ), |
| new Interval( 0x1772, 0x1773 ), new Interval( 0x17B4, 0x17B5 ), new Interval( 0x17B7, 0x17BD ), |
| new Interval( 0x17C6, 0x17C6 ), new Interval( 0x17C9, 0x17D3 ), new Interval( 0x17DD, 0x17DD ), |
| new Interval( 0x180B, 0x180D ), new Interval( 0x18A9, 0x18A9 ), new Interval( 0x1920, 0x1922 ), |
| new Interval( 0x1927, 0x1928 ), new Interval( 0x1932, 0x1932 ), new Interval( 0x1939, 0x193B ), |
| new Interval( 0x1A17, 0x1A18 ), new Interval( 0x1B00, 0x1B03 ), new Interval( 0x1B34, 0x1B34 ), |
| new Interval( 0x1B36, 0x1B3A ), new Interval( 0x1B3C, 0x1B3C ), new Interval( 0x1B42, 0x1B42 ), |
| new Interval( 0x1B6B, 0x1B73 ), new Interval( 0x1DC0, 0x1DCA ), new Interval( 0x1DFE, 0x1DFF ), |
| new Interval( 0x200B, 0x200F ), new Interval( 0x202A, 0x202E ), new Interval( 0x2060, 0x2063 ), |
| new Interval( 0x206A, 0x206F ), new Interval( 0x20D0, 0x20EF ), new Interval( 0x302A, 0x302F ), |
| new Interval( 0x3099, 0x309A ), new Interval( 0xA806, 0xA806 ), new Interval( 0xA80B, 0xA80B ), |
| new Interval( 0xA825, 0xA826 ), new Interval( 0xFB1E, 0xFB1E ), new Interval( 0xFE00, 0xFE0F ), |
| new Interval( 0xFE20, 0xFE23 ), new Interval( 0xFEFF, 0xFEFF ), new Interval( 0xFFF9, 0xFFFB ), |
| new Interval( 0x10A01, 0x10A03 ), new Interval( 0x10A05, 0x10A06 ), new Interval( 0x10A0C, 0x10A0F ), |
| new Interval( 0x10A38, 0x10A3A ), new Interval( 0x10A3F, 0x10A3F ), new Interval( 0x1D167, 0x1D169 ), |
| new Interval( 0x1D173, 0x1D182 ), new Interval( 0x1D185, 0x1D18B ), new Interval( 0x1D1AA, 0x1D1AD ), |
| new Interval( 0x1D242, 0x1D244 ), new Interval( 0xE0001, 0xE0001 ), new Interval( 0xE0020, 0xE007F ), |
| new Interval( 0xE0100, 0xE01EF ) |
| }; |
| |
| private static class Interval { |
| public final int first; |
| public final int last; |
| |
| public Interval(int first, int last) { |
| this.first = first; |
| this.last = last; |
| } |
| } |
| |
| /* auxiliary function for binary search in interval table */ |
| private static boolean bisearch(int ucs, 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; |
| } |
| |
| |
| } |