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jerchjerch
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faster wcwidth with lookup table
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2 files changed

+251
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‎src/InputHandler.test.ts

Lines changed: 132 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
11
import { assert } from 'chai';
22
import { InputHandler } from './InputHandler';
3+
import { wcwidth } from './InputHandler';
34

45
describe('InputHandler', () => {
56
describe('setCursorStyle', () => {
@@ -47,3 +48,134 @@ describe('InputHandler', () => {
4748
});
4849
});
4950
});
51+
52+
const old_wcwidth = (function(opts) {
53+
// extracted from https://www.cl.cam.ac.uk/%7Emgk25/ucs/wcwidth.c
54+
// combining characters
55+
const COMBINING = [
56+
[0x0300, 0x036F], [0x0483, 0x0486], [0x0488, 0x0489],
57+
[0x0591, 0x05BD], [0x05BF, 0x05BF], [0x05C1, 0x05C2],
58+
[0x05C4, 0x05C5], [0x05C7, 0x05C7], [0x0600, 0x0603],
59+
[0x0610, 0x0615], [0x064B, 0x065E], [0x0670, 0x0670],
60+
[0x06D6, 0x06E4], [0x06E7, 0x06E8], [0x06EA, 0x06ED],
61+
[0x070F, 0x070F], [0x0711, 0x0711], [0x0730, 0x074A],
62+
[0x07A6, 0x07B0], [0x07EB, 0x07F3], [0x0901, 0x0902],
63+
[0x093C, 0x093C], [0x0941, 0x0948], [0x094D, 0x094D],
64+
[0x0951, 0x0954], [0x0962, 0x0963], [0x0981, 0x0981],
65+
[0x09BC, 0x09BC], [0x09C1, 0x09C4], [0x09CD, 0x09CD],
66+
[0x09E2, 0x09E3], [0x0A01, 0x0A02], [0x0A3C, 0x0A3C],
67+
[0x0A41, 0x0A42], [0x0A47, 0x0A48], [0x0A4B, 0x0A4D],
68+
[0x0A70, 0x0A71], [0x0A81, 0x0A82], [0x0ABC, 0x0ABC],
69+
[0x0AC1, 0x0AC5], [0x0AC7, 0x0AC8], [0x0ACD, 0x0ACD],
70+
[0x0AE2, 0x0AE3], [0x0B01, 0x0B01], [0x0B3C, 0x0B3C],
71+
[0x0B3F, 0x0B3F], [0x0B41, 0x0B43], [0x0B4D, 0x0B4D],
72+
[0x0B56, 0x0B56], [0x0B82, 0x0B82], [0x0BC0, 0x0BC0],
73+
[0x0BCD, 0x0BCD], [0x0C3E, 0x0C40], [0x0C46, 0x0C48],
74+
[0x0C4A, 0x0C4D], [0x0C55, 0x0C56], [0x0CBC, 0x0CBC],
75+
[0x0CBF, 0x0CBF], [0x0CC6, 0x0CC6], [0x0CCC, 0x0CCD],
76+
[0x0CE2, 0x0CE3], [0x0D41, 0x0D43], [0x0D4D, 0x0D4D],
77+
[0x0DCA, 0x0DCA], [0x0DD2, 0x0DD4], [0x0DD6, 0x0DD6],
78+
[0x0E31, 0x0E31], [0x0E34, 0x0E3A], [0x0E47, 0x0E4E],
79+
[0x0EB1, 0x0EB1], [0x0EB4, 0x0EB9], [0x0EBB, 0x0EBC],
80+
[0x0EC8, 0x0ECD], [0x0F18, 0x0F19], [0x0F35, 0x0F35],
81+
[0x0F37, 0x0F37], [0x0F39, 0x0F39], [0x0F71, 0x0F7E],
82+
[0x0F80, 0x0F84], [0x0F86, 0x0F87], [0x0F90, 0x0F97],
83+
[0x0F99, 0x0FBC], [0x0FC6, 0x0FC6], [0x102D, 0x1030],
84+
[0x1032, 0x1032], [0x1036, 0x1037], [0x1039, 0x1039],
85+
[0x1058, 0x1059], [0x1160, 0x11FF], [0x135F, 0x135F],
86+
[0x1712, 0x1714], [0x1732, 0x1734], [0x1752, 0x1753],
87+
[0x1772, 0x1773], [0x17B4, 0x17B5], [0x17B7, 0x17BD],
88+
[0x17C6, 0x17C6], [0x17C9, 0x17D3], [0x17DD, 0x17DD],
89+
[0x180B, 0x180D], [0x18A9, 0x18A9], [0x1920, 0x1922],
90+
[0x1927, 0x1928], [0x1932, 0x1932], [0x1939, 0x193B],
91+
[0x1A17, 0x1A18], [0x1B00, 0x1B03], [0x1B34, 0x1B34],
92+
[0x1B36, 0x1B3A], [0x1B3C, 0x1B3C], [0x1B42, 0x1B42],
93+
[0x1B6B, 0x1B73], [0x1DC0, 0x1DCA], [0x1DFE, 0x1DFF],
94+
[0x200B, 0x200F], [0x202A, 0x202E], [0x2060, 0x2063],
95+
[0x206A, 0x206F], [0x20D0, 0x20EF], [0x302A, 0x302F],
96+
[0x3099, 0x309A], [0xA806, 0xA806], [0xA80B, 0xA80B],
97+
[0xA825, 0xA826], [0xFB1E, 0xFB1E], [0xFE00, 0xFE0F],
98+
[0xFE20, 0xFE23], [0xFEFF, 0xFEFF], [0xFFF9, 0xFFFB],
99+
[0x10A01, 0x10A03], [0x10A05, 0x10A06], [0x10A0C, 0x10A0F],
100+
[0x10A38, 0x10A3A], [0x10A3F, 0x10A3F], [0x1D167, 0x1D169],
101+
[0x1D173, 0x1D182], [0x1D185, 0x1D18B], [0x1D1AA, 0x1D1AD],
102+
[0x1D242, 0x1D244], [0xE0001, 0xE0001], [0xE0020, 0xE007F],
103+
[0xE0100, 0xE01EF]
104+
];
105+
// binary search
106+
function bisearch(ucs) {
107+
let min = 0;
108+
let max = COMBINING.length - 1;
109+
let mid;
110+
if (ucs < COMBINING[0][0] || ucs > COMBINING[max][1])
111+
return false;
112+
while (max >= min) {
113+
mid = Math.floor((min + max) / 2);
114+
if (ucs > COMBINING[mid][1])
115+
min = mid + 1;
116+
else if (ucs < COMBINING[mid][0])
117+
max = mid - 1;
118+
else
119+
return true;
120+
}
121+
return false;
122+
}
123+
function wcwidth(ucs) {
124+
// test for 8-bit control characters
125+
if (ucs === 0)
126+
return opts.nul;
127+
if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0))
128+
return opts.control;
129+
// binary search in table of non-spacing characters
130+
if (bisearch(ucs))
131+
return 0;
132+
// if we arrive here, ucs is not a combining or C0/C1 control character
133+
if (isWide(ucs)) {
134+
return 2;
135+
}
136+
return 1;
137+
}
138+
function isWide(ucs) {
139+
return (
140+
ucs >= 0x1100 && (
141+
ucs <= 0x115f || // Hangul Jamo init. consonants
142+
ucs === 0x2329 ||
143+
ucs === 0x232a ||
144+
(ucs >= 0x2e80 && ucs <= 0xa4cf && ucs !== 0x303f) || // CJK..Yi
145+
(ucs >= 0xac00 && ucs <= 0xd7a3) || // Hangul Syllables
146+
(ucs >= 0xf900 && ucs <= 0xfaff) || // CJK Compat Ideographs
147+
(ucs >= 0xfe10 && ucs <= 0xfe19) || // Vertical forms
148+
(ucs >= 0xfe30 && ucs <= 0xfe6f) || // CJK Compat Forms
149+
(ucs >= 0xff00 && ucs <= 0xff60) || // Fullwidth Forms
150+
(ucs >= 0xffe0 && ucs <= 0xffe6) ||
151+
(ucs >= 0x20000 && ucs <= 0x2fffd) ||
152+
(ucs >= 0x30000 && ucs <= 0x3fffd)));
153+
}
154+
return wcwidth;
155+
})({nul: 0, control: 0}); // configurable options
156+
157+
describe('wcwidth', () => {
158+
it('same as old implementation for BMP and individual higher', () => {
159+
for (let i=0; i<65536; ++i)
160+
assert.equal(wcwidth(i), old_wcwidth(i));
161+
// test some individual higher to fullfill branching
162+
assert.equal(wcwidth(0x10A01), old_wcwidth(0x10A01));
163+
assert.equal(wcwidth(0x30000), old_wcwidth(0x30000));
164+
assert.equal(wcwidth(0x3fffe), old_wcwidth(0x3fffe));
165+
});
166+
it('new is at least 10 times faster', () => {
167+
let start_new = new Date().getTime();
168+
let x = 0;
169+
for (let runs=0; runs<1; ++runs)
170+
for (let i=0; i<65536; ++i)
171+
x = wcwidth(i);
172+
let end_new = new Date().getTime();
173+
let start_old = new Date().getTime();
174+
let y = 0;
175+
for (let runs=0; runs<1; ++runs)
176+
for (let i=0; i<65536; ++i)
177+
y = old_wcwidth(i);
178+
let end_old = new Date().getTime();
179+
assert.equal(((end_new-start_new)*10 < (end_old-start_old)), true);
180+
});
181+
});

‎src/InputHandler.ts

Lines changed: 119 additions & 94 deletions
Original file line numberDiff line numberDiff line change
@@ -1490,95 +1490,97 @@ export class InputHandler implements IInputHandler {
14901490
}
14911491
}
14921492

1493-
const wcwidth = (function(opts) {
1494-
// extracted from https://www.cl.cam.ac.uk/%7Emgk25/ucs/wcwidth.c
1495-
// combining characters
1496-
const COMBINING = [
1497-
[0x0300, 0x036F], [0x0483, 0x0486], [0x0488, 0x0489],
1498-
[0x0591, 0x05BD], [0x05BF, 0x05BF], [0x05C1, 0x05C2],
1499-
[0x05C4, 0x05C5], [0x05C7, 0x05C7], [0x0600, 0x0603],
1500-
[0x0610, 0x0615], [0x064B, 0x065E], [0x0670, 0x0670],
1501-
[0x06D6, 0x06E4], [0x06E7, 0x06E8], [0x06EA, 0x06ED],
1502-
[0x070F, 0x070F], [0x0711, 0x0711], [0x0730, 0x074A],
1503-
[0x07A6, 0x07B0], [0x07EB, 0x07F3], [0x0901, 0x0902],
1504-
[0x093C, 0x093C], [0x0941, 0x0948], [0x094D, 0x094D],
1505-
[0x0951, 0x0954], [0x0962, 0x0963], [0x0981, 0x0981],
1506-
[0x09BC, 0x09BC], [0x09C1, 0x09C4], [0x09CD, 0x09CD],
1507-
[0x09E2, 0x09E3], [0x0A01, 0x0A02], [0x0A3C, 0x0A3C],
1508-
[0x0A41, 0x0A42], [0x0A47, 0x0A48], [0x0A4B, 0x0A4D],
1509-
[0x0A70, 0x0A71], [0x0A81, 0x0A82], [0x0ABC, 0x0ABC],
1510-
[0x0AC1, 0x0AC5], [0x0AC7, 0x0AC8], [0x0ACD, 0x0ACD],
1511-
[0x0AE2, 0x0AE3], [0x0B01, 0x0B01], [0x0B3C, 0x0B3C],
1512-
[0x0B3F, 0x0B3F], [0x0B41, 0x0B43], [0x0B4D, 0x0B4D],
1513-
[0x0B56, 0x0B56], [0x0B82, 0x0B82], [0x0BC0, 0x0BC0],
1514-
[0x0BCD, 0x0BCD], [0x0C3E, 0x0C40], [0x0C46, 0x0C48],
1515-
[0x0C4A, 0x0C4D], [0x0C55, 0x0C56], [0x0CBC, 0x0CBC],
1516-
[0x0CBF, 0x0CBF], [0x0CC6, 0x0CC6], [0x0CCC, 0x0CCD],
1517-
[0x0CE2, 0x0CE3], [0x0D41, 0x0D43], [0x0D4D, 0x0D4D],
1518-
[0x0DCA, 0x0DCA], [0x0DD2, 0x0DD4], [0x0DD6, 0x0DD6],
1519-
[0x0E31, 0x0E31], [0x0E34, 0x0E3A], [0x0E47, 0x0E4E],
1520-
[0x0EB1, 0x0EB1], [0x0EB4, 0x0EB9], [0x0EBB, 0x0EBC],
1521-
[0x0EC8, 0x0ECD], [0x0F18, 0x0F19], [0x0F35, 0x0F35],
1522-
[0x0F37, 0x0F37], [0x0F39, 0x0F39], [0x0F71, 0x0F7E],
1523-
[0x0F80, 0x0F84], [0x0F86, 0x0F87], [0x0F90, 0x0F97],
1524-
[0x0F99, 0x0FBC], [0x0FC6, 0x0FC6], [0x102D, 0x1030],
1525-
[0x1032, 0x1032], [0x1036, 0x1037], [0x1039, 0x1039],
1526-
[0x1058, 0x1059], [0x1160, 0x11FF], [0x135F, 0x135F],
1527-
[0x1712, 0x1714], [0x1732, 0x1734], [0x1752, 0x1753],
1528-
[0x1772, 0x1773], [0x17B4, 0x17B5], [0x17B7, 0x17BD],
1529-
[0x17C6, 0x17C6], [0x17C9, 0x17D3], [0x17DD, 0x17DD],
1530-
[0x180B, 0x180D], [0x18A9, 0x18A9], [0x1920, 0x1922],
1531-
[0x1927, 0x1928], [0x1932, 0x1932], [0x1939, 0x193B],
1532-
[0x1A17, 0x1A18], [0x1B00, 0x1B03], [0x1B34, 0x1B34],
1533-
[0x1B36, 0x1B3A], [0x1B3C, 0x1B3C], [0x1B42, 0x1B42],
1534-
[0x1B6B, 0x1B73], [0x1DC0, 0x1DCA], [0x1DFE, 0x1DFF],
1535-
[0x200B, 0x200F], [0x202A, 0x202E], [0x2060, 0x2063],
1536-
[0x206A, 0x206F], [0x20D0, 0x20EF], [0x302A, 0x302F],
1537-
[0x3099, 0x309A], [0xA806, 0xA806], [0xA80B, 0xA80B],
1538-
[0xA825, 0xA826], [0xFB1E, 0xFB1E], [0xFE00, 0xFE0F],
1539-
[0xFE20, 0xFE23], [0xFEFF, 0xFEFF], [0xFFF9, 0xFFFB],
1540-
[0x10A01, 0x10A03], [0x10A05, 0x10A06], [0x10A0C, 0x10A0F],
1541-
[0x10A38, 0x10A3A], [0x10A3F, 0x10A3F], [0x1D167, 0x1D169],
1542-
[0x1D173, 0x1D182], [0x1D185, 0x1D18B], [0x1D1AA, 0x1D1AD],
1543-
[0x1D242, 0x1D244], [0xE0001, 0xE0001], [0xE0020, 0xE007F],
1544-
[0xE0100, 0xE01EF]
1545-
];
1546-
// binary search
1547-
function bisearch(ucs) {
1548-
let min = 0;
1549-
let max = COMBINING.length - 1;
1550-
let mid;
1551-
if (ucs < COMBINING[0][0] || ucs > COMBINING[max][1])
1552-
return false;
1553-
while (max >= min) {
1554-
mid = Math.floor((min + max) / 2);
1555-
if (ucs > COMBINING[mid][1])
1556-
min = mid + 1;
1557-
else if (ucs < COMBINING[mid][0])
1558-
max = mid - 1;
1559-
else
1560-
return true;
1561-
}
1562-
return false;
1563-
}
1564-
function wcwidth(ucs) {
1565-
// test for 8-bit control characters
1566-
if (ucs === 0)
1567-
return opts.nul;
1568-
if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0))
1569-
return opts.control;
1570-
// binary search in table of non-spacing characters
1571-
if (bisearch(ucs))
1572-
return 0;
1573-
// if we arrive here, ucs is not a combining or C0/C1 control character
1574-
if (isWide(ucs)) {
1575-
return 2;
1576-
}
1577-
return 1;
1578-
}
1579-
function isWide(ucs) {
1580-
return (
1581-
ucs >= 0x1100 && (
1493+
export const wcwidth = (function(opts) {
1494+
// extracted from https://www.cl.cam.ac.uk/%7Emgk25/ucs/wcwidth.c
1495+
// combining characters
1496+
const COMBINING_BMP = [
1497+
[0x0300, 0x036F], [0x0483, 0x0486], [0x0488, 0x0489],
1498+
[0x0591, 0x05BD], [0x05BF, 0x05BF], [0x05C1, 0x05C2],
1499+
[0x05C4, 0x05C5], [0x05C7, 0x05C7], [0x0600, 0x0603],
1500+
[0x0610, 0x0615], [0x064B, 0x065E], [0x0670, 0x0670],
1501+
[0x06D6, 0x06E4], [0x06E7, 0x06E8], [0x06EA, 0x06ED],
1502+
[0x070F, 0x070F], [0x0711, 0x0711], [0x0730, 0x074A],
1503+
[0x07A6, 0x07B0], [0x07EB, 0x07F3], [0x0901, 0x0902],
1504+
[0x093C, 0x093C], [0x0941, 0x0948], [0x094D, 0x094D],
1505+
[0x0951, 0x0954], [0x0962, 0x0963], [0x0981, 0x0981],
1506+
[0x09BC, 0x09BC], [0x09C1, 0x09C4], [0x09CD, 0x09CD],
1507+
[0x09E2, 0x09E3], [0x0A01, 0x0A02], [0x0A3C, 0x0A3C],
1508+
[0x0A41, 0x0A42], [0x0A47, 0x0A48], [0x0A4B, 0x0A4D],
1509+
[0x0A70, 0x0A71], [0x0A81, 0x0A82], [0x0ABC, 0x0ABC],
1510+
[0x0AC1, 0x0AC5], [0x0AC7, 0x0AC8], [0x0ACD, 0x0ACD],
1511+
[0x0AE2, 0x0AE3], [0x0B01, 0x0B01], [0x0B3C, 0x0B3C],
1512+
[0x0B3F, 0x0B3F], [0x0B41, 0x0B43], [0x0B4D, 0x0B4D],
1513+
[0x0B56, 0x0B56], [0x0B82, 0x0B82], [0x0BC0, 0x0BC0],
1514+
[0x0BCD, 0x0BCD], [0x0C3E, 0x0C40], [0x0C46, 0x0C48],
1515+
[0x0C4A, 0x0C4D], [0x0C55, 0x0C56], [0x0CBC, 0x0CBC],
1516+
[0x0CBF, 0x0CBF], [0x0CC6, 0x0CC6], [0x0CCC, 0x0CCD],
1517+
[0x0CE2, 0x0CE3], [0x0D41, 0x0D43], [0x0D4D, 0x0D4D],
1518+
[0x0DCA, 0x0DCA], [0x0DD2, 0x0DD4], [0x0DD6, 0x0DD6],
1519+
[0x0E31, 0x0E31], [0x0E34, 0x0E3A], [0x0E47, 0x0E4E],
1520+
[0x0EB1, 0x0EB1], [0x0EB4, 0x0EB9], [0x0EBB, 0x0EBC],
1521+
[0x0EC8, 0x0ECD], [0x0F18, 0x0F19], [0x0F35, 0x0F35],
1522+
[0x0F37, 0x0F37], [0x0F39, 0x0F39], [0x0F71, 0x0F7E],
1523+
[0x0F80, 0x0F84], [0x0F86, 0x0F87], [0x0F90, 0x0F97],
1524+
[0x0F99, 0x0FBC], [0x0FC6, 0x0FC6], [0x102D, 0x1030],
1525+
[0x1032, 0x1032], [0x1036, 0x1037], [0x1039, 0x1039],
1526+
[0x1058, 0x1059], [0x1160, 0x11FF], [0x135F, 0x135F],
1527+
[0x1712, 0x1714], [0x1732, 0x1734], [0x1752, 0x1753],
1528+
[0x1772, 0x1773], [0x17B4, 0x17B5], [0x17B7, 0x17BD],
1529+
[0x17C6, 0x17C6], [0x17C9, 0x17D3], [0x17DD, 0x17DD],
1530+
[0x180B, 0x180D], [0x18A9, 0x18A9], [0x1920, 0x1922],
1531+
[0x1927, 0x1928], [0x1932, 0x1932], [0x1939, 0x193B],
1532+
[0x1A17, 0x1A18], [0x1B00, 0x1B03], [0x1B34, 0x1B34],
1533+
[0x1B36, 0x1B3A], [0x1B3C, 0x1B3C], [0x1B42, 0x1B42],
1534+
[0x1B6B, 0x1B73], [0x1DC0, 0x1DCA], [0x1DFE, 0x1DFF],
1535+
[0x200B, 0x200F], [0x202A, 0x202E], [0x2060, 0x2063],
1536+
[0x206A, 0x206F], [0x20D0, 0x20EF], [0x302A, 0x302F],
1537+
[0x3099, 0x309A], [0xA806, 0xA806], [0xA80B, 0xA80B],
1538+
[0xA825, 0xA826], [0xFB1E, 0xFB1E], [0xFE00, 0xFE0F],
1539+
[0xFE20, 0xFE23], [0xFEFF, 0xFEFF], [0xFFF9, 0xFFFB],
1540+
];
1541+
const COMBINING_HIGH = [
1542+
[0x10A01, 0x10A03], [0x10A05, 0x10A06], [0x10A0C, 0x10A0F],
1543+
[0x10A38, 0x10A3A], [0x10A3F, 0x10A3F], [0x1D167, 0x1D169],
1544+
[0x1D173, 0x1D182], [0x1D185, 0x1D18B], [0x1D1AA, 0x1D1AD],
1545+
[0x1D242, 0x1D244], [0xE0001, 0xE0001], [0xE0020, 0xE007F],
1546+
[0xE0100, 0xE01EF]
1547+
];
1548+
// binary search
1549+
function bisearch(ucs, data) {
1550+
let min = 0;
1551+
let max = data.length - 1;
1552+
let mid;
1553+
if (ucs < data[0][0] || ucs > data[max][1])
1554+
return false;
1555+
while (max >= min) {
1556+
mid = Math.floor((min + max) / 2);
1557+
if (ucs > data[mid][1])
1558+
min = mid + 1;
1559+
else if (ucs < data[mid][0])
1560+
max = mid - 1;
1561+
else
1562+
return true;
1563+
}
1564+
return false;
1565+
}
1566+
function wcwidthBMP(ucs) {
1567+
// test for 8-bit control characters
1568+
if (ucs === 0)
1569+
return opts.nul;
1570+
if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0))
1571+
return opts.control;
1572+
// binary search in table of non-spacing characters
1573+
if (bisearch(ucs, COMBINING_BMP))
1574+
return 0;
1575+
// if we arrive here, ucs is not a combining or C0/C1 control character
1576+
if (isWideBMP(ucs)) {
1577+
return 2;
1578+
}
1579+
return 1;
1580+
}
1581+
function isWideBMP(ucs) {
1582+
return (
1583+
ucs >= 0x1100 && (
15821584
ucs <= 0x115f || // Hangul Jamo init. consonants
15831585
ucs === 0x2329 ||
15841586
ucs === 0x232a ||
@@ -1588,9 +1590,32 @@ const wcwidth = (function(opts) {
15881590
(ucs >= 0xfe10 && ucs <= 0xfe19) || // Vertical forms
15891591
(ucs >= 0xfe30 && ucs <= 0xfe6f) || // CJK Compat Forms
15901592
(ucs >= 0xff00 && ucs <= 0xff60) || // Fullwidth Forms
1591-
(ucs >= 0xffe0 && ucs <= 0xffe6) ||
1592-
(ucs >= 0x20000 && ucs <= 0x2fffd) ||
1593-
(ucs >= 0x30000 && ucs <= 0x3fffd)));
1594-
}
1595-
return wcwidth;
1593+
(ucs >= 0xffe0 && ucs <= 0xffe6)));
1594+
}
1595+
function wcwidthHigh(ucs) {
1596+
if (bisearch(ucs, COMBINING_HIGH))
1597+
return 0;
1598+
if ((ucs >= 0x20000 && ucs <= 0x2fffd) || (ucs >= 0x30000 && ucs <= 0x3fffd)) {
1599+
return 2;
1600+
}
1601+
return 1;
1602+
}
1603+
let table = new Uint8Array(16384);
1604+
for (let i=0; i<16384; ++i) {
1605+
let j = i * 4;
1606+
let num = 0;
1607+
num |= (wcwidthBMP(j+3));
1608+
num <<= 2;
1609+
num |= (wcwidthBMP(j+2));
1610+
num <<= 2;
1611+
num |= (wcwidthBMP(j+1));
1612+
num <<= 2;
1613+
num |= (wcwidthBMP(j));
1614+
table[i] = num;
1615+
}
1616+
return function (num) {
1617+
num = num|0;
1618+
return (num<65536) ? (table[num>>2] >> ((num & 3) * 2))&3 : wcwidthHigh(num);
1619+
}
15961620
})({nul: 0, control: 0}); // configurable options
1621+

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