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annotate src/libvterm/src/unicode.c @ 13130:161b5fe12b11 v8.0.1439

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patch 8.0.1439: if cscope fails a search Vim may hang commit https://github.com/vim/vim/commit/1274d33493efb6250470a37b9f4432bb31e87d64 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Jan 30 21:47:52 2018 +0100 patch 8.0.1439: if cscope fails a search Vim may hang Problem: If cscope fails a search Vim may hang. Solution: Bail out when a search error is encountered. (Safouane Baroudi, closes #2598)
author Christian Brabandt <cb@256bit.org>
date Tue, 30 Jan 2018 22:00:07 +0100
parents b9b06aa0b6d9
children 2449b6ce1456
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1 #include "vterm_internal.h"
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2
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3 /* ### The following from http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
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4 * With modifications:
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5 * made functions static
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6 * moved 'combining' table to file scope, so other functions can see it
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7 * ###################################################################
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8 */
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9
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10 /*
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11 * This is an implementation of wcwidth() and wcswidth() (defined in
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12 * IEEE Std 1002.1-2001) for Unicode.
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13 *
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14 * http://www.opengroup.org/onlinepubs/007904975/functions/wcwidth.html
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15 * http://www.opengroup.org/onlinepubs/007904975/functions/wcswidth.html
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16 *
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17 * In fixed-width output devices, Latin characters all occupy a single
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18 * "cell" position of equal width, whereas ideographic CJK characters
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19 * occupy two such cells. Interoperability between terminal-line
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20 * applications and (teletype-style) character terminals using the
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21 * UTF-8 encoding requires agreement on which character should advance
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22 * the cursor by how many cell positions. No established formal
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23 * standards exist at present on which Unicode character shall occupy
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24 * how many cell positions on character terminals. These routines are
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25 * a first attempt of defining such behavior based on simple rules
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26 * applied to data provided by the Unicode Consortium.
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27 *
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28 * For some graphical characters, the Unicode standard explicitly
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29 * defines a character-cell width via the definition of the East Asian
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30 * FullWidth (F), Wide (W), Half-width (H), and Narrow (Na) classes.
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31 * In all these cases, there is no ambiguity about which width a
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32 * terminal shall use. For characters in the East Asian Ambiguous (A)
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33 * class, the width choice depends purely on a preference of backward
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34 * compatibility with either historic CJK or Western practice.
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35 * Choosing single-width for these characters is easy to justify as
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36 * the appropriate long-term solution, as the CJK practice of
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37 * displaying these characters as double-width comes from historic
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38 * implementation simplicity (8-bit encoded characters were displayed
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39 * single-width and 16-bit ones double-width, even for Greek,
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40 * Cyrillic, etc.) and not any typographic considerations.
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41 *
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42 * Much less clear is the choice of width for the Not East Asian
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43 * (Neutral) class. Existing practice does not dictate a width for any
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44 * of these characters. It would nevertheless make sense
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45 * typographically to allocate two character cells to characters such
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46 * as for instance EM SPACE or VOLUME INTEGRAL, which cannot be
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47 * represented adequately with a single-width glyph. The following
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48 * routines at present merely assign a single-cell width to all
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49 * neutral characters, in the interest of simplicity. This is not
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50 * entirely satisfactory and should be reconsidered before
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51 * establishing a formal standard in this area. At the moment, the
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52 * decision which Not East Asian (Neutral) characters should be
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53 * represented by double-width glyphs cannot yet be answered by
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54 * applying a simple rule from the Unicode database content. Setting
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55 * up a proper standard for the behavior of UTF-8 character terminals
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56 * will require a careful analysis not only of each Unicode character,
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57 * but also of each presentation form, something the author of these
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58 * routines has avoided to do so far.
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59 *
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60 * http://www.unicode.org/unicode/reports/tr11/
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61 *
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62 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
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63 *
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64 * Permission to use, copy, modify, and distribute this software
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65 * for any purpose and without fee is hereby granted. The author
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66 * disclaims all warranties with regard to this software.
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67 *
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68 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
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69 */
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70
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71 #if !defined(IS_COMBINING_FUNCTION) || !defined(WCWIDTH_FUNCTION)
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72 struct interval {
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73 int first;
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74 int last;
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75 };
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76
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77 /* sorted list of non-overlapping intervals of non-spacing characters */
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78 /* generated by "uniset +cat=Me +cat=Mn +cat=Cf -00AD +1160-11FF +200B c" */
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79 static const struct interval combining[] = {
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80 { 0x0300, 0x036F }, { 0x0483, 0x0486 }, { 0x0488, 0x0489 },
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81 { 0x0591, 0x05BD }, { 0x05BF, 0x05BF }, { 0x05C1, 0x05C2 },
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82 { 0x05C4, 0x05C5 }, { 0x05C7, 0x05C7 }, { 0x0600, 0x0603 },
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83 { 0x0610, 0x0615 }, { 0x064B, 0x065E }, { 0x0670, 0x0670 },
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84 { 0x06D6, 0x06E4 }, { 0x06E7, 0x06E8 }, { 0x06EA, 0x06ED },
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85 { 0x070F, 0x070F }, { 0x0711, 0x0711 }, { 0x0730, 0x074A },
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86 { 0x07A6, 0x07B0 }, { 0x07EB, 0x07F3 }, { 0x0901, 0x0902 },
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87 { 0x093C, 0x093C }, { 0x0941, 0x0948 }, { 0x094D, 0x094D },
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88 { 0x0951, 0x0954 }, { 0x0962, 0x0963 }, { 0x0981, 0x0981 },
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89 { 0x09BC, 0x09BC }, { 0x09C1, 0x09C4 }, { 0x09CD, 0x09CD },
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90 { 0x09E2, 0x09E3 }, { 0x0A01, 0x0A02 }, { 0x0A3C, 0x0A3C },
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91 { 0x0A41, 0x0A42 }, { 0x0A47, 0x0A48 }, { 0x0A4B, 0x0A4D },
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92 { 0x0A70, 0x0A71 }, { 0x0A81, 0x0A82 }, { 0x0ABC, 0x0ABC },
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93 { 0x0AC1, 0x0AC5 }, { 0x0AC7, 0x0AC8 }, { 0x0ACD, 0x0ACD },
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94 { 0x0AE2, 0x0AE3 }, { 0x0B01, 0x0B01 }, { 0x0B3C, 0x0B3C },
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95 { 0x0B3F, 0x0B3F }, { 0x0B41, 0x0B43 }, { 0x0B4D, 0x0B4D },
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96 { 0x0B56, 0x0B56 }, { 0x0B82, 0x0B82 }, { 0x0BC0, 0x0BC0 },
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97 { 0x0BCD, 0x0BCD }, { 0x0C3E, 0x0C40 }, { 0x0C46, 0x0C48 },
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98 { 0x0C4A, 0x0C4D }, { 0x0C55, 0x0C56 }, { 0x0CBC, 0x0CBC },
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99 { 0x0CBF, 0x0CBF }, { 0x0CC6, 0x0CC6 }, { 0x0CCC, 0x0CCD },
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100 { 0x0CE2, 0x0CE3 }, { 0x0D41, 0x0D43 }, { 0x0D4D, 0x0D4D },
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101 { 0x0DCA, 0x0DCA }, { 0x0DD2, 0x0DD4 }, { 0x0DD6, 0x0DD6 },
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102 { 0x0E31, 0x0E31 }, { 0x0E34, 0x0E3A }, { 0x0E47, 0x0E4E },
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103 { 0x0EB1, 0x0EB1 }, { 0x0EB4, 0x0EB9 }, { 0x0EBB, 0x0EBC },
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104 { 0x0EC8, 0x0ECD }, { 0x0F18, 0x0F19 }, { 0x0F35, 0x0F35 },
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105 { 0x0F37, 0x0F37 }, { 0x0F39, 0x0F39 }, { 0x0F71, 0x0F7E },
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106 { 0x0F80, 0x0F84 }, { 0x0F86, 0x0F87 }, { 0x0F90, 0x0F97 },
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107 { 0x0F99, 0x0FBC }, { 0x0FC6, 0x0FC6 }, { 0x102D, 0x1030 },
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108 { 0x1032, 0x1032 }, { 0x1036, 0x1037 }, { 0x1039, 0x1039 },
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109 { 0x1058, 0x1059 }, { 0x1160, 0x11FF }, { 0x135F, 0x135F },
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110 { 0x1712, 0x1714 }, { 0x1732, 0x1734 }, { 0x1752, 0x1753 },
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111 { 0x1772, 0x1773 }, { 0x17B4, 0x17B5 }, { 0x17B7, 0x17BD },
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112 { 0x17C6, 0x17C6 }, { 0x17C9, 0x17D3 }, { 0x17DD, 0x17DD },
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113 { 0x180B, 0x180D }, { 0x18A9, 0x18A9 }, { 0x1920, 0x1922 },
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114 { 0x1927, 0x1928 }, { 0x1932, 0x1932 }, { 0x1939, 0x193B },
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115 { 0x1A17, 0x1A18 }, { 0x1B00, 0x1B03 }, { 0x1B34, 0x1B34 },
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116 { 0x1B36, 0x1B3A }, { 0x1B3C, 0x1B3C }, { 0x1B42, 0x1B42 },
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117 { 0x1B6B, 0x1B73 }, { 0x1DC0, 0x1DCA }, { 0x1DFE, 0x1DFF },
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118 { 0x200B, 0x200F }, { 0x202A, 0x202E }, { 0x2060, 0x2063 },
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119 { 0x206A, 0x206F }, { 0x20D0, 0x20EF }, { 0x302A, 0x302F },
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120 { 0x3099, 0x309A }, { 0xA806, 0xA806 }, { 0xA80B, 0xA80B },
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121 { 0xA825, 0xA826 }, { 0xFB1E, 0xFB1E }, { 0xFE00, 0xFE0F },
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122 { 0xFE20, 0xFE23 }, { 0xFEFF, 0xFEFF }, { 0xFFF9, 0xFFFB },
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123 { 0x10A01, 0x10A03 }, { 0x10A05, 0x10A06 }, { 0x10A0C, 0x10A0F },
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124 { 0x10A38, 0x10A3A }, { 0x10A3F, 0x10A3F }, { 0x1D167, 0x1D169 },
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125 { 0x1D173, 0x1D182 }, { 0x1D185, 0x1D18B }, { 0x1D1AA, 0x1D1AD },
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126 { 0x1D242, 0x1D244 }, { 0xE0001, 0xE0001 }, { 0xE0020, 0xE007F },
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127 { 0xE0100, 0xE01EF }
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128 };
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129
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130 /* auxiliary function for binary search in interval table */
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131 static int bisearch(uint32_t ucs, const struct interval *table, int max) {
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132 int min = 0;
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133 int mid;
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134
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135 if ((int)ucs < table[0].first || (int)ucs > table[max].last)
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136 return 0;
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137 while (max >= min) {
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138 mid = (min + max) / 2;
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139 if ((int)ucs > table[mid].last)
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140 min = mid + 1;
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141 else if ((int)ucs < table[mid].first)
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142 max = mid - 1;
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143 else
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144 return 1;
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145 }
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146
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147 return 0;
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148 }
12210
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149 #endif
11621
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150
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151
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152 /* The following two functions define the column width of an ISO 10646
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153 * character as follows:
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154 *
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155 * - The null character (U+0000) has a column width of 0.
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156 *
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157 * - Other C0/C1 control characters and DEL will lead to a return
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158 * value of -1.
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159 *
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160 * - Non-spacing and enclosing combining characters (general
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161 * category code Mn or Me in the Unicode database) have a
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162 * column width of 0.
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163 *
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164 * - SOFT HYPHEN (U+00AD) has a column width of 1.
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165 *
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166 * - Other format characters (general category code Cf in the Unicode
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167 * database) and ZERO WIDTH SPACE (U+200B) have a column width of 0.
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168 *
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169 * - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF)
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170 * have a column width of 0.
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171 *
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172 * - Spacing characters in the East Asian Wide (W) or East Asian
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173 * Full-width (F) category as defined in Unicode Technical
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174 * Report #11 have a column width of 2.
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175 *
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176 * - All remaining characters (including all printable
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177 * ISO 8859-1 and WGL4 characters, Unicode control characters,
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178 * etc.) have a column width of 1.
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179 *
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180 * This implementation assumes that uint32_t characters are encoded
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181 * in ISO 10646.
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182 */
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183
12210
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184 #ifdef WCWIDTH_FUNCTION
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185 /* use a provided wcwidth() function */
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186 int WCWIDTH_FUNCTION(uint32_t ucs);
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187 #else
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188 # define WCWIDTH_FUNCTION mk_wcwidth
11621
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189
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190 static int mk_wcwidth(uint32_t ucs)
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191 {
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192 /* test for 8-bit control characters */
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193 if (ucs == 0)
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194 return 0;
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195 if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0))
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196 return -1;
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197
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198 /* binary search in table of non-spacing characters */
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diff changeset
199 if (bisearch(ucs, combining,
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200 sizeof(combining) / sizeof(struct interval) - 1))
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201 return 0;
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202
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203 /* if we arrive here, ucs is not a combining or C0/C1 control character */
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204
12210
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205 return 1 +
11621
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206 (ucs >= 0x1100 &&
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diff changeset
207 (ucs <= 0x115f || /* Hangul Jamo init. consonants */
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208 ucs == 0x2329 || ucs == 0x232a ||
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209 (ucs >= 0x2e80 && ucs <= 0xa4cf &&
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210 ucs != 0x303f) || /* CJK ... Yi */
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211 (ucs >= 0xac00 && ucs <= 0xd7a3) || /* Hangul Syllables */
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212 (ucs >= 0xf900 && ucs <= 0xfaff) || /* CJK Compatibility Ideographs */
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213 (ucs >= 0xfe10 && ucs <= 0xfe19) || /* Vertical forms */
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214 (ucs >= 0xfe30 && ucs <= 0xfe6f) || /* CJK Compatibility Forms */
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215 (ucs >= 0xff00 && ucs <= 0xff60) || /* Fullwidth Forms */
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216 (ucs >= 0xffe0 && ucs <= 0xffe6) ||
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217 (ucs >= 0x20000 && ucs <= 0x2fffd) ||
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218 (ucs >= 0x30000 && ucs <= 0x3fffd)));
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219 }
12210
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220 #endif
11621
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221
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222 #if 0 /* unused */
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223 static int mk_wcswidth(const uint32_t *pwcs, size_t n)
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diff changeset
224 {
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diff changeset
225 int w, width = 0;
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diff changeset
226
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227 for (;*pwcs && n-- > 0; pwcs++)
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228 if ((w = mk_wcwidth(*pwcs)) < 0)
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229 return -1;
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230 else
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231 width += w;
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diff changeset
232
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233 return width;
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234 }
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diff changeset
235
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diff changeset
236
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diff changeset
237 /*
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238 * The following functions are the same as mk_wcwidth() and
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239 * mk_wcswidth(), except that spacing characters in the East Asian
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240 * Ambiguous (A) category as defined in Unicode Technical Report #11
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241 * have a column width of 2. This variant might be useful for users of
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242 * CJK legacy encodings who want to migrate to UCS without changing
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diff changeset
243 * the traditional terminal character-width behaviour. It is not
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244 * otherwise recommended for general use.
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245 */
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diff changeset
246 static int mk_wcwidth_cjk(uint32_t ucs)
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diff changeset
247 {
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248 /* sorted list of non-overlapping intervals of East Asian Ambiguous
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parents:
diff changeset
249 * characters, generated by "uniset +WIDTH-A -cat=Me -cat=Mn -cat=Cf c" */
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
250 static const struct interval ambiguous[] = {
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
251 { 0x00A1, 0x00A1 }, { 0x00A4, 0x00A4 }, { 0x00A7, 0x00A8 },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
252 { 0x00AA, 0x00AA }, { 0x00AE, 0x00AE }, { 0x00B0, 0x00B4 },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
253 { 0x00B6, 0x00BA }, { 0x00BC, 0x00BF }, { 0x00C6, 0x00C6 },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
254 { 0x00D0, 0x00D0 }, { 0x00D7, 0x00D8 }, { 0x00DE, 0x00E1 },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
255 { 0x00E6, 0x00E6 }, { 0x00E8, 0x00EA }, { 0x00EC, 0x00ED },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
256 { 0x00F0, 0x00F0 }, { 0x00F2, 0x00F3 }, { 0x00F7, 0x00FA },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
257 { 0x00FC, 0x00FC }, { 0x00FE, 0x00FE }, { 0x0101, 0x0101 },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
258 { 0x0111, 0x0111 }, { 0x0113, 0x0113 }, { 0x011B, 0x011B },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
259 { 0x0126, 0x0127 }, { 0x012B, 0x012B }, { 0x0131, 0x0133 },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
260 { 0x0138, 0x0138 }, { 0x013F, 0x0142 }, { 0x0144, 0x0144 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
261 { 0x0148, 0x014B }, { 0x014D, 0x014D }, { 0x0152, 0x0153 },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
262 { 0x0166, 0x0167 }, { 0x016B, 0x016B }, { 0x01CE, 0x01CE },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
263 { 0x01D0, 0x01D0 }, { 0x01D2, 0x01D2 }, { 0x01D4, 0x01D4 },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
264 { 0x01D6, 0x01D6 }, { 0x01D8, 0x01D8 }, { 0x01DA, 0x01DA },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
265 { 0x01DC, 0x01DC }, { 0x0251, 0x0251 }, { 0x0261, 0x0261 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
266 { 0x02C4, 0x02C4 }, { 0x02C7, 0x02C7 }, { 0x02C9, 0x02CB },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
267 { 0x02CD, 0x02CD }, { 0x02D0, 0x02D0 }, { 0x02D8, 0x02DB },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
268 { 0x02DD, 0x02DD }, { 0x02DF, 0x02DF }, { 0x0391, 0x03A1 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
269 { 0x03A3, 0x03A9 }, { 0x03B1, 0x03C1 }, { 0x03C3, 0x03C9 },
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parents:
diff changeset
270 { 0x0401, 0x0401 }, { 0x0410, 0x044F }, { 0x0451, 0x0451 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
271 { 0x2010, 0x2010 }, { 0x2013, 0x2016 }, { 0x2018, 0x2019 },
b8299e742f41 patch 8.0.0693: no terminal emulator support
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parents:
diff changeset
272 { 0x201C, 0x201D }, { 0x2020, 0x2022 }, { 0x2024, 0x2027 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
273 { 0x2030, 0x2030 }, { 0x2032, 0x2033 }, { 0x2035, 0x2035 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
274 { 0x203B, 0x203B }, { 0x203E, 0x203E }, { 0x2074, 0x2074 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
275 { 0x207F, 0x207F }, { 0x2081, 0x2084 }, { 0x20AC, 0x20AC },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
276 { 0x2103, 0x2103 }, { 0x2105, 0x2105 }, { 0x2109, 0x2109 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
277 { 0x2113, 0x2113 }, { 0x2116, 0x2116 }, { 0x2121, 0x2122 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
278 { 0x2126, 0x2126 }, { 0x212B, 0x212B }, { 0x2153, 0x2154 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
279 { 0x215B, 0x215E }, { 0x2160, 0x216B }, { 0x2170, 0x2179 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
280 { 0x2190, 0x2199 }, { 0x21B8, 0x21B9 }, { 0x21D2, 0x21D2 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
281 { 0x21D4, 0x21D4 }, { 0x21E7, 0x21E7 }, { 0x2200, 0x2200 },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
282 { 0x2202, 0x2203 }, { 0x2207, 0x2208 }, { 0x220B, 0x220B },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
283 { 0x220F, 0x220F }, { 0x2211, 0x2211 }, { 0x2215, 0x2215 },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
284 { 0x221A, 0x221A }, { 0x221D, 0x2220 }, { 0x2223, 0x2223 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
285 { 0x2225, 0x2225 }, { 0x2227, 0x222C }, { 0x222E, 0x222E },
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Christian Brabandt <cb@256bit.org>
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diff changeset
286 { 0x2234, 0x2237 }, { 0x223C, 0x223D }, { 0x2248, 0x2248 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
287 { 0x224C, 0x224C }, { 0x2252, 0x2252 }, { 0x2260, 0x2261 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
288 { 0x2264, 0x2267 }, { 0x226A, 0x226B }, { 0x226E, 0x226F },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
289 { 0x2282, 0x2283 }, { 0x2286, 0x2287 }, { 0x2295, 0x2295 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
290 { 0x2299, 0x2299 }, { 0x22A5, 0x22A5 }, { 0x22BF, 0x22BF },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
291 { 0x2312, 0x2312 }, { 0x2460, 0x24E9 }, { 0x24EB, 0x254B },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
292 { 0x2550, 0x2573 }, { 0x2580, 0x258F }, { 0x2592, 0x2595 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
293 { 0x25A0, 0x25A1 }, { 0x25A3, 0x25A9 }, { 0x25B2, 0x25B3 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
294 { 0x25B6, 0x25B7 }, { 0x25BC, 0x25BD }, { 0x25C0, 0x25C1 },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
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diff changeset
295 { 0x25C6, 0x25C8 }, { 0x25CB, 0x25CB }, { 0x25CE, 0x25D1 },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
296 { 0x25E2, 0x25E5 }, { 0x25EF, 0x25EF }, { 0x2605, 0x2606 },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
297 { 0x2609, 0x2609 }, { 0x260E, 0x260F }, { 0x2614, 0x2615 },
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
298 { 0x261C, 0x261C }, { 0x261E, 0x261E }, { 0x2640, 0x2640 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
299 { 0x2642, 0x2642 }, { 0x2660, 0x2661 }, { 0x2663, 0x2665 },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
300 { 0x2667, 0x266A }, { 0x266C, 0x266D }, { 0x266F, 0x266F },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
301 { 0x273D, 0x273D }, { 0x2776, 0x277F }, { 0xE000, 0xF8FF },
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
302 { 0xFFFD, 0xFFFD }, { 0xF0000, 0xFFFFD }, { 0x100000, 0x10FFFD }
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parents:
diff changeset
303 };
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
304
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
305 /* binary search in table of non-spacing characters */
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parents:
diff changeset
306 if (bisearch(ucs, ambiguous,
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
307 sizeof(ambiguous) / sizeof(struct interval) - 1))
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
308 return 2;
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parents:
diff changeset
309
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parents:
diff changeset
310 return mk_wcwidth(ucs);
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
311 }
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
312
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parents:
diff changeset
313 static int mk_wcswidth_cjk(const uint32_t *pwcs, size_t n)
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
314 {
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
315 int w, width = 0;
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
316
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
317 for (;*pwcs && n-- > 0; pwcs++)
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parents:
diff changeset
318 if ((w = mk_wcwidth_cjk(*pwcs)) < 0)
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parents:
diff changeset
319 return -1;
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
320 else
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
321 width += w;
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
322
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
323 return width;
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
324 }
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
325 #endif
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
326
12210
b9b06aa0b6d9 patch 8.0.0985: libvterm has its own idea of character width
Christian Brabandt <cb@256bit.org>
parents: 11621
diff changeset
327 #ifdef IS_COMBINING_FUNCTION
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parents: 11621
diff changeset
328 /* Use a provided is_combining() function. */
b9b06aa0b6d9 patch 8.0.0985: libvterm has its own idea of character width
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parents: 11621
diff changeset
329 int IS_COMBINING_FUNCTION(uint32_t codepoint);
b9b06aa0b6d9 patch 8.0.0985: libvterm has its own idea of character width
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parents: 11621
diff changeset
330 #else
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parents: 11621
diff changeset
331 # define IS_COMBINING_FUNCTION vterm_is_combining
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Christian Brabandt <cb@256bit.org>
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diff changeset
332 static int
b9b06aa0b6d9 patch 8.0.0985: libvterm has its own idea of character width
Christian Brabandt <cb@256bit.org>
parents: 11621
diff changeset
333 vterm_is_combining(uint32_t codepoint)
b9b06aa0b6d9 patch 8.0.0985: libvterm has its own idea of character width
Christian Brabandt <cb@256bit.org>
parents: 11621
diff changeset
334 {
b9b06aa0b6d9 patch 8.0.0985: libvterm has its own idea of character width
Christian Brabandt <cb@256bit.org>
parents: 11621
diff changeset
335 return bisearch(codepoint, combining, sizeof(combining) / sizeof(struct interval) - 1);
b9b06aa0b6d9 patch 8.0.0985: libvterm has its own idea of character width
Christian Brabandt <cb@256bit.org>
parents: 11621
diff changeset
336 }
b9b06aa0b6d9 patch 8.0.0985: libvterm has its own idea of character width
Christian Brabandt <cb@256bit.org>
parents: 11621
diff changeset
337 #endif
b9b06aa0b6d9 patch 8.0.0985: libvterm has its own idea of character width
Christian Brabandt <cb@256bit.org>
parents: 11621
diff changeset
338
b9b06aa0b6d9 patch 8.0.0985: libvterm has its own idea of character width
Christian Brabandt <cb@256bit.org>
parents: 11621
diff changeset
339
11621
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
340 /* ################################
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
341 * ### The rest added by Paul Evans */
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
342
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
343 INTERNAL int vterm_unicode_width(uint32_t codepoint)
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
344 {
12210
b9b06aa0b6d9 patch 8.0.0985: libvterm has its own idea of character width
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parents: 11621
diff changeset
345 return WCWIDTH_FUNCTION(codepoint);
11621
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Christian Brabandt <cb@256bit.org>
parents:
diff changeset
346 }
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
347
b8299e742f41 patch 8.0.0693: no terminal emulator support
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
348 INTERNAL int vterm_unicode_is_combining(uint32_t codepoint)
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parents:
diff changeset
349 {
12210
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Christian Brabandt <cb@256bit.org>
parents: 11621
diff changeset
350 return IS_COMBINING_FUNCTION(codepoint);
11621
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parents:
diff changeset
351 }