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wcwidth.c
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/*
* Copyright (C) Fredrik Fornwall 2016.
* Distributed under the MIT License.
*
* Implementation of wcwidth(3) as a C port of:
* https://github.com/jquast/wcwidth
*
* Report issues at:
* https://github.com/termux/wcwidth
*
* IMPORTANT:
* Must be kept in sync with the following:
* https://github.com/termux/termux-app/blob/master/terminal-emulator/src/main/java/com/termux/terminal/WcWidth.java
* https://github.com/termux/libandroid-support
* https://github.com/termux/termux-packages/tree/master/packages/libandroid-support
*/
#include <stdbool.h>
#include <stdlib.h>
struct width_interval {
int start;
int end;
};
// From https://github.com/jquast/wcwidth/blob/master/wcwidth/table_zero.py
// from https://github.com/jquast/wcwidth/pull/64
// at commit 1b9b6585b0080ea5cb88dc9815796505724793fe (2022-12-16):
static struct width_interval ZERO_WIDTH[] = {
{0x00300, 0x0036f}, // Combining Grave Accent ..Combining Latin Small Le
{0x00483, 0x00489}, // Combining Cyrillic Titlo..Combining Cyrillic Milli
{0x00591, 0x005bd}, // Hebrew Accent Etnahta ..Hebrew Point Meteg
{0x005bf, 0x005bf}, // Hebrew Point Rafe ..Hebrew Point Rafe
{0x005c1, 0x005c2}, // Hebrew Point Shin Dot ..Hebrew Point Sin Dot
{0x005c4, 0x005c5}, // Hebrew Mark Upper Dot ..Hebrew Mark Lower Dot
{0x005c7, 0x005c7}, // Hebrew Point Qamats Qata..Hebrew Point Qamats Qata
{0x00610, 0x0061a}, // Arabic Sign Sallallahou ..Arabic Small Kasra
{0x0064b, 0x0065f}, // Arabic Fathatan ..Arabic Wavy Hamza Below
{0x00670, 0x00670}, // Arabic Letter Superscrip..Arabic Letter Superscrip
{0x006d6, 0x006dc}, // Arabic Small High Ligatu..Arabic Small High Seen
{0x006df, 0x006e4}, // Arabic Small High Rounde..Arabic Small High Madda
{0x006e7, 0x006e8}, // Arabic Small High Yeh ..Arabic Small High Noon
{0x006ea, 0x006ed}, // Arabic Empty Centre Low ..Arabic Small Low Meem
{0x00711, 0x00711}, // Syriac Letter Superscrip..Syriac Letter Superscrip
{0x00730, 0x0074a}, // Syriac Pthaha Above ..Syriac Barrekh
{0x007a6, 0x007b0}, // Thaana Abafili ..Thaana Sukun
{0x007eb, 0x007f3}, // Nko Combining Short High..Nko Combining Double Dot
{0x007fd, 0x007fd}, // Nko Dantayalan ..Nko Dantayalan
{0x00816, 0x00819}, // Samaritan Mark In ..Samaritan Mark Dagesh
{0x0081b, 0x00823}, // Samaritan Mark Epentheti..Samaritan Vowel Sign A
{0x00825, 0x00827}, // Samaritan Vowel Sign Sho..Samaritan Vowel Sign U
{0x00829, 0x0082d}, // Samaritan Vowel Sign Lon..Samaritan Mark Nequdaa
{0x00859, 0x0085b}, // Mandaic Affrication Mark..Mandaic Gemination Mark
{0x00898, 0x0089f}, // Arabic Small High Word A..Arabic Half Madda Over M
{0x008ca, 0x008e1}, // Arabic Small High Farsi ..Arabic Small High Sign S
{0x008e3, 0x00902}, // Arabic Turned Damma Belo..Devanagari Sign Anusvara
{0x0093a, 0x0093a}, // Devanagari Vowel Sign Oe..Devanagari Vowel Sign Oe
{0x0093c, 0x0093c}, // Devanagari Sign Nukta ..Devanagari Sign Nukta
{0x00941, 0x00948}, // Devanagari Vowel Sign U ..Devanagari Vowel Sign Ai
{0x0094d, 0x0094d}, // Devanagari Sign Virama ..Devanagari Sign Virama
{0x00951, 0x00957}, // Devanagari Stress Sign U..Devanagari Vowel Sign Uu
{0x00962, 0x00963}, // Devanagari Vowel Sign Vo..Devanagari Vowel Sign Vo
{0x00981, 0x00981}, // Bengali Sign Candrabindu..Bengali Sign Candrabindu
{0x009bc, 0x009bc}, // Bengali Sign Nukta ..Bengali Sign Nukta
{0x009c1, 0x009c4}, // Bengali Vowel Sign U ..Bengali Vowel Sign Vocal
{0x009cd, 0x009cd}, // Bengali Sign Virama ..Bengali Sign Virama
{0x009e2, 0x009e3}, // Bengali Vowel Sign Vocal..Bengali Vowel Sign Vocal
{0x009fe, 0x009fe}, // Bengali Sandhi Mark ..Bengali Sandhi Mark
{0x00a01, 0x00a02}, // Gurmukhi Sign Adak Bindi..Gurmukhi Sign Bindi
{0x00a3c, 0x00a3c}, // Gurmukhi Sign Nukta ..Gurmukhi Sign Nukta
{0x00a41, 0x00a42}, // Gurmukhi Vowel Sign U ..Gurmukhi Vowel Sign Uu
{0x00a47, 0x00a48}, // Gurmukhi Vowel Sign Ee ..Gurmukhi Vowel Sign Ai
{0x00a4b, 0x00a4d}, // Gurmukhi Vowel Sign Oo ..Gurmukhi Sign Virama
{0x00a51, 0x00a51}, // Gurmukhi Sign Udaat ..Gurmukhi Sign Udaat
{0x00a70, 0x00a71}, // Gurmukhi Tippi ..Gurmukhi Addak
{0x00a75, 0x00a75}, // Gurmukhi Sign Yakash ..Gurmukhi Sign Yakash
{0x00a81, 0x00a82}, // Gujarati Sign Candrabind..Gujarati Sign Anusvara
{0x00abc, 0x00abc}, // Gujarati Sign Nukta ..Gujarati Sign Nukta
{0x00ac1, 0x00ac5}, // Gujarati Vowel Sign U ..Gujarati Vowel Sign Cand
{0x00ac7, 0x00ac8}, // Gujarati Vowel Sign E ..Gujarati Vowel Sign Ai
{0x00acd, 0x00acd}, // Gujarati Sign Virama ..Gujarati Sign Virama
{0x00ae2, 0x00ae3}, // Gujarati Vowel Sign Voca..Gujarati Vowel Sign Voca
{0x00afa, 0x00aff}, // Gujarati Sign Sukun ..Gujarati Sign Two-circle
{0x00b01, 0x00b01}, // Oriya Sign Candrabindu ..Oriya Sign Candrabindu
{0x00b3c, 0x00b3c}, // Oriya Sign Nukta ..Oriya Sign Nukta
{0x00b3f, 0x00b3f}, // Oriya Vowel Sign I ..Oriya Vowel Sign I
{0x00b41, 0x00b44}, // Oriya Vowel Sign U ..Oriya Vowel Sign Vocalic
{0x00b4d, 0x00b4d}, // Oriya Sign Virama ..Oriya Sign Virama
{0x00b55, 0x00b56}, // Oriya Sign Overline ..Oriya Ai Length Mark
{0x00b62, 0x00b63}, // Oriya Vowel Sign Vocalic..Oriya Vowel Sign Vocalic
{0x00b82, 0x00b82}, // Tamil Sign Anusvara ..Tamil Sign Anusvara
{0x00bc0, 0x00bc0}, // Tamil Vowel Sign Ii ..Tamil Vowel Sign Ii
{0x00bcd, 0x00bcd}, // Tamil Sign Virama ..Tamil Sign Virama
{0x00c00, 0x00c00}, // Telugu Sign Combining Ca..Telugu Sign Combining Ca
{0x00c04, 0x00c04}, // Telugu Sign Combining An..Telugu Sign Combining An
{0x00c3c, 0x00c3c}, // Telugu Sign Nukta ..Telugu Sign Nukta
{0x00c3e, 0x00c40}, // Telugu Vowel Sign Aa ..Telugu Vowel Sign Ii
{0x00c46, 0x00c48}, // Telugu Vowel Sign E ..Telugu Vowel Sign Ai
{0x00c4a, 0x00c4d}, // Telugu Vowel Sign O ..Telugu Sign Virama
{0x00c55, 0x00c56}, // Telugu Length Mark ..Telugu Ai Length Mark
{0x00c62, 0x00c63}, // Telugu Vowel Sign Vocali..Telugu Vowel Sign Vocali
{0x00c81, 0x00c81}, // Kannada Sign Candrabindu..Kannada Sign Candrabindu
{0x00cbc, 0x00cbc}, // Kannada Sign Nukta ..Kannada Sign Nukta
{0x00cbf, 0x00cbf}, // Kannada Vowel Sign I ..Kannada Vowel Sign I
{0x00cc6, 0x00cc6}, // Kannada Vowel Sign E ..Kannada Vowel Sign E
{0x00ccc, 0x00ccd}, // Kannada Vowel Sign Au ..Kannada Sign Virama
{0x00ce2, 0x00ce3}, // Kannada Vowel Sign Vocal..Kannada Vowel Sign Vocal
{0x00d00, 0x00d01}, // Malayalam Sign Combining..Malayalam Sign Candrabin
{0x00d3b, 0x00d3c}, // Malayalam Sign Vertical ..Malayalam Sign Circular
{0x00d41, 0x00d44}, // Malayalam Vowel Sign U ..Malayalam Vowel Sign Voc
{0x00d4d, 0x00d4d}, // Malayalam Sign Virama ..Malayalam Sign Virama
{0x00d62, 0x00d63}, // Malayalam Vowel Sign Voc..Malayalam Vowel Sign Voc
{0x00d81, 0x00d81}, // Sinhala Sign Candrabindu..Sinhala Sign Candrabindu
{0x00dca, 0x00dca}, // Sinhala Sign Al-lakuna ..Sinhala Sign Al-lakuna
{0x00dd2, 0x00dd4}, // Sinhala Vowel Sign Ketti..Sinhala Vowel Sign Ketti
{0x00dd6, 0x00dd6}, // Sinhala Vowel Sign Diga ..Sinhala Vowel Sign Diga
{0x00e31, 0x00e31}, // Thai Character Mai Han-a..Thai Character Mai Han-a
{0x00e34, 0x00e3a}, // Thai Character Sara I ..Thai Character Phinthu
{0x00e47, 0x00e4e}, // Thai Character Maitaikhu..Thai Character Yamakkan
{0x00eb1, 0x00eb1}, // Lao Vowel Sign Mai Kan ..Lao Vowel Sign Mai Kan
{0x00eb4, 0x00ebc}, // Lao Vowel Sign I ..Lao Semivowel Sign Lo
{0x00ec8, 0x00ece}, // Lao Tone Mai Ek ..(nil)
{0x00f18, 0x00f19}, // Tibetan Astrological Sig..Tibetan Astrological Sig
{0x00f35, 0x00f35}, // Tibetan Mark Ngas Bzung ..Tibetan Mark Ngas Bzung
{0x00f37, 0x00f37}, // Tibetan Mark Ngas Bzung ..Tibetan Mark Ngas Bzung
{0x00f39, 0x00f39}, // Tibetan Mark Tsa -phru ..Tibetan Mark Tsa -phru
{0x00f71, 0x00f7e}, // Tibetan Vowel Sign Aa ..Tibetan Sign Rjes Su Nga
{0x00f80, 0x00f84}, // Tibetan Vowel Sign Rever..Tibetan Mark Halanta
{0x00f86, 0x00f87}, // Tibetan Sign Lci Rtags ..Tibetan Sign Yang Rtags
{0x00f8d, 0x00f97}, // Tibetan Subjoined Sign L..Tibetan Subjoined Letter
{0x00f99, 0x00fbc}, // Tibetan Subjoined Letter..Tibetan Subjoined Letter
{0x00fc6, 0x00fc6}, // Tibetan Symbol Padma Gda..Tibetan Symbol Padma Gda
{0x0102d, 0x01030}, // Myanmar Vowel Sign I ..Myanmar Vowel Sign Uu
{0x01032, 0x01037}, // Myanmar Vowel Sign Ai ..Myanmar Sign Dot Below
{0x01039, 0x0103a}, // Myanmar Sign Virama ..Myanmar Sign Asat
{0x0103d, 0x0103e}, // Myanmar Consonant Sign M..Myanmar Consonant Sign M
{0x01058, 0x01059}, // Myanmar Vowel Sign Vocal..Myanmar Vowel Sign Vocal
{0x0105e, 0x01060}, // Myanmar Consonant Sign M..Myanmar Consonant Sign M
{0x01071, 0x01074}, // Myanmar Vowel Sign Geba ..Myanmar Vowel Sign Kayah
{0x01082, 0x01082}, // Myanmar Consonant Sign S..Myanmar Consonant Sign S
{0x01085, 0x01086}, // Myanmar Vowel Sign Shan ..Myanmar Vowel Sign Shan
{0x0108d, 0x0108d}, // Myanmar Sign Shan Counci..Myanmar Sign Shan Counci
{0x0109d, 0x0109d}, // Myanmar Vowel Sign Aiton..Myanmar Vowel Sign Aiton
{0x0135d, 0x0135f}, // Ethiopic Combining Gemin..Ethiopic Combining Gemin
{0x01712, 0x01714}, // Tagalog Vowel Sign I ..Tagalog Sign Virama
{0x01732, 0x01733}, // Hanunoo Vowel Sign I ..Hanunoo Vowel Sign U
{0x01752, 0x01753}, // Buhid Vowel Sign I ..Buhid Vowel Sign U
{0x01772, 0x01773}, // Tagbanwa Vowel Sign I ..Tagbanwa Vowel Sign U
{0x017b4, 0x017b5}, // Khmer Vowel Inherent Aq ..Khmer Vowel Inherent Aa
{0x017b7, 0x017bd}, // Khmer Vowel Sign I ..Khmer Vowel Sign Ua
{0x017c6, 0x017c6}, // Khmer Sign Nikahit ..Khmer Sign Nikahit
{0x017c9, 0x017d3}, // Khmer Sign Muusikatoan ..Khmer Sign Bathamasat
{0x017dd, 0x017dd}, // Khmer Sign Atthacan ..Khmer Sign Atthacan
{0x0180b, 0x0180d}, // Mongolian Free Variation..Mongolian Free Variation
{0x0180f, 0x0180f}, // Mongolian Free Variation..Mongolian Free Variation
{0x01885, 0x01886}, // Mongolian Letter Ali Gal..Mongolian Letter Ali Gal
{0x018a9, 0x018a9}, // Mongolian Letter Ali Gal..Mongolian Letter Ali Gal
{0x01920, 0x01922}, // Limbu Vowel Sign A ..Limbu Vowel Sign U
{0x01927, 0x01928}, // Limbu Vowel Sign E ..Limbu Vowel Sign O
{0x01932, 0x01932}, // Limbu Small Letter Anusv..Limbu Small Letter Anusv
{0x01939, 0x0193b}, // Limbu Sign Mukphreng ..Limbu Sign Sa-i
{0x01a17, 0x01a18}, // Buginese Vowel Sign I ..Buginese Vowel Sign U
{0x01a1b, 0x01a1b}, // Buginese Vowel Sign Ae ..Buginese Vowel Sign Ae
{0x01a56, 0x01a56}, // Tai Tham Consonant Sign ..Tai Tham Consonant Sign
{0x01a58, 0x01a5e}, // Tai Tham Sign Mai Kang L..Tai Tham Consonant Sign
{0x01a60, 0x01a60}, // Tai Tham Sign Sakot ..Tai Tham Sign Sakot
{0x01a62, 0x01a62}, // Tai Tham Vowel Sign Mai ..Tai Tham Vowel Sign Mai
{0x01a65, 0x01a6c}, // Tai Tham Vowel Sign I ..Tai Tham Vowel Sign Oa B
{0x01a73, 0x01a7c}, // Tai Tham Vowel Sign Oa A..Tai Tham Sign Khuen-lue
{0x01a7f, 0x01a7f}, // Tai Tham Combining Crypt..Tai Tham Combining Crypt
{0x01ab0, 0x01ace}, // Combining Doubled Circum..Combining Latin Small Le
{0x01b00, 0x01b03}, // Balinese Sign Ulu Ricem ..Balinese Sign Surang
{0x01b34, 0x01b34}, // Balinese Sign Rerekan ..Balinese Sign Rerekan
{0x01b36, 0x01b3a}, // Balinese Vowel Sign Ulu ..Balinese Vowel Sign Ra R
{0x01b3c, 0x01b3c}, // Balinese Vowel Sign La L..Balinese Vowel Sign La L
{0x01b42, 0x01b42}, // Balinese Vowel Sign Pepe..Balinese Vowel Sign Pepe
{0x01b6b, 0x01b73}, // Balinese Musical Symbol ..Balinese Musical Symbol
{0x01b80, 0x01b81}, // Sundanese Sign Panyecek ..Sundanese Sign Panglayar
{0x01ba2, 0x01ba5}, // Sundanese Consonant Sign..Sundanese Vowel Sign Pan
{0x01ba8, 0x01ba9}, // Sundanese Vowel Sign Pam..Sundanese Vowel Sign Pan
{0x01bab, 0x01bad}, // Sundanese Sign Virama ..Sundanese Consonant Sign
{0x01be6, 0x01be6}, // Batak Sign Tompi ..Batak Sign Tompi
{0x01be8, 0x01be9}, // Batak Vowel Sign Pakpak ..Batak Vowel Sign Ee
{0x01bed, 0x01bed}, // Batak Vowel Sign Karo O ..Batak Vowel Sign Karo O
{0x01bef, 0x01bf1}, // Batak Vowel Sign U For S..Batak Consonant Sign H
{0x01c2c, 0x01c33}, // Lepcha Vowel Sign E ..Lepcha Consonant Sign T
{0x01c36, 0x01c37}, // Lepcha Sign Ran ..Lepcha Sign Nukta
{0x01cd0, 0x01cd2}, // Vedic Tone Karshana ..Vedic Tone Prenkha
{0x01cd4, 0x01ce0}, // Vedic Sign Yajurvedic Mi..Vedic Tone Rigvedic Kash
{0x01ce2, 0x01ce8}, // Vedic Sign Visarga Svari..Vedic Sign Visarga Anuda
{0x01ced, 0x01ced}, // Vedic Sign Tiryak ..Vedic Sign Tiryak
{0x01cf4, 0x01cf4}, // Vedic Tone Candra Above ..Vedic Tone Candra Above
{0x01cf8, 0x01cf9}, // Vedic Tone Ring Above ..Vedic Tone Double Ring A
{0x01dc0, 0x01dff}, // Combining Dotted Grave A..Combining Right Arrowhea
{0x020d0, 0x020f0}, // Combining Left Harpoon A..Combining Asterisk Above
{0x02cef, 0x02cf1}, // Coptic Combining Ni Abov..Coptic Combining Spiritu
{0x02d7f, 0x02d7f}, // Tifinagh Consonant Joine..Tifinagh Consonant Joine
{0x02de0, 0x02dff}, // Combining Cyrillic Lette..Combining Cyrillic Lette
{0x0302a, 0x0302d}, // Ideographic Level Tone M..Ideographic Entering Ton
{0x03099, 0x0309a}, // Combining Katakana-hirag..Combining Katakana-hirag
{0x0a66f, 0x0a672}, // Combining Cyrillic Vzmet..Combining Cyrillic Thous
{0x0a674, 0x0a67d}, // Combining Cyrillic Lette..Combining Cyrillic Payer
{0x0a69e, 0x0a69f}, // Combining Cyrillic Lette..Combining Cyrillic Lette
{0x0a6f0, 0x0a6f1}, // Bamum Combining Mark Koq..Bamum Combining Mark Tuk
{0x0a802, 0x0a802}, // Syloti Nagri Sign Dvisva..Syloti Nagri Sign Dvisva
{0x0a806, 0x0a806}, // Syloti Nagri Sign Hasant..Syloti Nagri Sign Hasant
{0x0a80b, 0x0a80b}, // Syloti Nagri Sign Anusva..Syloti Nagri Sign Anusva
{0x0a825, 0x0a826}, // Syloti Nagri Vowel Sign ..Syloti Nagri Vowel Sign
{0x0a82c, 0x0a82c}, // Syloti Nagri Sign Altern..Syloti Nagri Sign Altern
{0x0a8c4, 0x0a8c5}, // Saurashtra Sign Virama ..Saurashtra Sign Candrabi
{0x0a8e0, 0x0a8f1}, // Combining Devanagari Dig..Combining Devanagari Sig
{0x0a8ff, 0x0a8ff}, // Devanagari Vowel Sign Ay..Devanagari Vowel Sign Ay
{0x0a926, 0x0a92d}, // Kayah Li Vowel Ue ..Kayah Li Tone Calya Plop
{0x0a947, 0x0a951}, // Rejang Vowel Sign I ..Rejang Consonant Sign R
{0x0a980, 0x0a982}, // Javanese Sign Panyangga ..Javanese Sign Layar
{0x0a9b3, 0x0a9b3}, // Javanese Sign Cecak Telu..Javanese Sign Cecak Telu
{0x0a9b6, 0x0a9b9}, // Javanese Vowel Sign Wulu..Javanese Vowel Sign Suku
{0x0a9bc, 0x0a9bd}, // Javanese Vowel Sign Pepe..Javanese Consonant Sign
{0x0a9e5, 0x0a9e5}, // Myanmar Sign Shan Saw ..Myanmar Sign Shan Saw
{0x0aa29, 0x0aa2e}, // Cham Vowel Sign Aa ..Cham Vowel Sign Oe
{0x0aa31, 0x0aa32}, // Cham Vowel Sign Au ..Cham Vowel Sign Ue
{0x0aa35, 0x0aa36}, // Cham Consonant Sign La ..Cham Consonant Sign Wa
{0x0aa43, 0x0aa43}, // Cham Consonant Sign Fina..Cham Consonant Sign Fina
{0x0aa4c, 0x0aa4c}, // Cham Consonant Sign Fina..Cham Consonant Sign Fina
{0x0aa7c, 0x0aa7c}, // Myanmar Sign Tai Laing T..Myanmar Sign Tai Laing T
{0x0aab0, 0x0aab0}, // Tai Viet Mai Kang ..Tai Viet Mai Kang
{0x0aab2, 0x0aab4}, // Tai Viet Vowel I ..Tai Viet Vowel U
{0x0aab7, 0x0aab8}, // Tai Viet Mai Khit ..Tai Viet Vowel Ia
{0x0aabe, 0x0aabf}, // Tai Viet Vowel Am ..Tai Viet Tone Mai Ek
{0x0aac1, 0x0aac1}, // Tai Viet Tone Mai Tho ..Tai Viet Tone Mai Tho
{0x0aaec, 0x0aaed}, // Meetei Mayek Vowel Sign ..Meetei Mayek Vowel Sign
{0x0aaf6, 0x0aaf6}, // Meetei Mayek Virama ..Meetei Mayek Virama
{0x0abe5, 0x0abe5}, // Meetei Mayek Vowel Sign ..Meetei Mayek Vowel Sign
{0x0abe8, 0x0abe8}, // Meetei Mayek Vowel Sign ..Meetei Mayek Vowel Sign
{0x0abed, 0x0abed}, // Meetei Mayek Apun Iyek ..Meetei Mayek Apun Iyek
{0x0fb1e, 0x0fb1e}, // Hebrew Point Judeo-spani..Hebrew Point Judeo-spani
{0x0fe00, 0x0fe0f}, // Variation Selector-1 ..Variation Selector-16
{0x0fe20, 0x0fe2f}, // Combining Ligature Left ..Combining Cyrillic Titlo
{0x101fd, 0x101fd}, // Phaistos Disc Sign Combi..Phaistos Disc Sign Combi
{0x102e0, 0x102e0}, // Coptic Epact Thousands M..Coptic Epact Thousands M
{0x10376, 0x1037a}, // Combining Old Permic Let..Combining Old Permic Let
{0x10a01, 0x10a03}, // Kharoshthi Vowel Sign I ..Kharoshthi Vowel Sign Vo
{0x10a05, 0x10a06}, // Kharoshthi Vowel Sign E ..Kharoshthi Vowel Sign O
{0x10a0c, 0x10a0f}, // Kharoshthi Vowel Length ..Kharoshthi Sign Visarga
{0x10a38, 0x10a3a}, // Kharoshthi Sign Bar Abov..Kharoshthi Sign Dot Belo
{0x10a3f, 0x10a3f}, // Kharoshthi Virama ..Kharoshthi Virama
{0x10ae5, 0x10ae6}, // Manichaean Abbreviation ..Manichaean Abbreviation
{0x10d24, 0x10d27}, // Hanifi Rohingya Sign Har..Hanifi Rohingya Sign Tas
{0x10eab, 0x10eac}, // Yezidi Combining Hamza M..Yezidi Combining Madda M
{0x10efd, 0x10eff}, // (nil) ..(nil)
{0x10f46, 0x10f50}, // Sogdian Combining Dot Be..Sogdian Combining Stroke
{0x10f82, 0x10f85}, // Old Uyghur Combining Dot..Old Uyghur Combining Two
{0x11001, 0x11001}, // Brahmi Sign Anusvara ..Brahmi Sign Anusvara
{0x11038, 0x11046}, // Brahmi Vowel Sign Aa ..Brahmi Virama
{0x11070, 0x11070}, // Brahmi Sign Old Tamil Vi..Brahmi Sign Old Tamil Vi
{0x11073, 0x11074}, // Brahmi Vowel Sign Old Ta..Brahmi Vowel Sign Old Ta
{0x1107f, 0x11081}, // Brahmi Number Joiner ..Kaithi Sign Anusvara
{0x110b3, 0x110b6}, // Kaithi Vowel Sign U ..Kaithi Vowel Sign Ai
{0x110b9, 0x110ba}, // Kaithi Sign Virama ..Kaithi Sign Nukta
{0x110c2, 0x110c2}, // Kaithi Vowel Sign Vocali..Kaithi Vowel Sign Vocali
{0x11100, 0x11102}, // Chakma Sign Candrabindu ..Chakma Sign Visarga
{0x11127, 0x1112b}, // Chakma Vowel Sign A ..Chakma Vowel Sign Uu
{0x1112d, 0x11134}, // Chakma Vowel Sign Ai ..Chakma Maayyaa
{0x11173, 0x11173}, // Mahajani Sign Nukta ..Mahajani Sign Nukta
{0x11180, 0x11181}, // Sharada Sign Candrabindu..Sharada Sign Anusvara
{0x111b6, 0x111be}, // Sharada Vowel Sign U ..Sharada Vowel Sign O
{0x111c9, 0x111cc}, // Sharada Sandhi Mark ..Sharada Extra Short Vowe
{0x111cf, 0x111cf}, // Sharada Sign Inverted Ca..Sharada Sign Inverted Ca
{0x1122f, 0x11231}, // Khojki Vowel Sign U ..Khojki Vowel Sign Ai
{0x11234, 0x11234}, // Khojki Sign Anusvara ..Khojki Sign Anusvara
{0x11236, 0x11237}, // Khojki Sign Nukta ..Khojki Sign Shadda
{0x1123e, 0x1123e}, // Khojki Sign Sukun ..Khojki Sign Sukun
{0x11241, 0x11241}, // (nil) ..(nil)
{0x112df, 0x112df}, // Khudawadi Sign Anusvara ..Khudawadi Sign Anusvara
{0x112e3, 0x112ea}, // Khudawadi Vowel Sign U ..Khudawadi Sign Virama
{0x11300, 0x11301}, // Grantha Sign Combining A..Grantha Sign Candrabindu
{0x1133b, 0x1133c}, // Combining Bindu Below ..Grantha Sign Nukta
{0x11340, 0x11340}, // Grantha Vowel Sign Ii ..Grantha Vowel Sign Ii
{0x11366, 0x1136c}, // Combining Grantha Digit ..Combining Grantha Digit
{0x11370, 0x11374}, // Combining Grantha Letter..Combining Grantha Letter
{0x11438, 0x1143f}, // Newa Vowel Sign U ..Newa Vowel Sign Ai
{0x11442, 0x11444}, // Newa Sign Virama ..Newa Sign Anusvara
{0x11446, 0x11446}, // Newa Sign Nukta ..Newa Sign Nukta
{0x1145e, 0x1145e}, // Newa Sandhi Mark ..Newa Sandhi Mark
{0x114b3, 0x114b8}, // Tirhuta Vowel Sign U ..Tirhuta Vowel Sign Vocal
{0x114ba, 0x114ba}, // Tirhuta Vowel Sign Short..Tirhuta Vowel Sign Short
{0x114bf, 0x114c0}, // Tirhuta Sign Candrabindu..Tirhuta Sign Anusvara
{0x114c2, 0x114c3}, // Tirhuta Sign Virama ..Tirhuta Sign Nukta
{0x115b2, 0x115b5}, // Siddham Vowel Sign U ..Siddham Vowel Sign Vocal
{0x115bc, 0x115bd}, // Siddham Sign Candrabindu..Siddham Sign Anusvara
{0x115bf, 0x115c0}, // Siddham Sign Virama ..Siddham Sign Nukta
{0x115dc, 0x115dd}, // Siddham Vowel Sign Alter..Siddham Vowel Sign Alter
{0x11633, 0x1163a}, // Modi Vowel Sign U ..Modi Vowel Sign Ai
{0x1163d, 0x1163d}, // Modi Sign Anusvara ..Modi Sign Anusvara
{0x1163f, 0x11640}, // Modi Sign Virama ..Modi Sign Ardhacandra
{0x116ab, 0x116ab}, // Takri Sign Anusvara ..Takri Sign Anusvara
{0x116ad, 0x116ad}, // Takri Vowel Sign Aa ..Takri Vowel Sign Aa
{0x116b0, 0x116b5}, // Takri Vowel Sign U ..Takri Vowel Sign Au
{0x116b7, 0x116b7}, // Takri Sign Nukta ..Takri Sign Nukta
{0x1171d, 0x1171f}, // Ahom Consonant Sign Medi..Ahom Consonant Sign Medi
{0x11722, 0x11725}, // Ahom Vowel Sign I ..Ahom Vowel Sign Uu
{0x11727, 0x1172b}, // Ahom Vowel Sign Aw ..Ahom Sign Killer
{0x1182f, 0x11837}, // Dogra Vowel Sign U ..Dogra Sign Anusvara
{0x11839, 0x1183a}, // Dogra Sign Virama ..Dogra Sign Nukta
{0x1193b, 0x1193c}, // Dives Akuru Sign Anusvar..Dives Akuru Sign Candrab
{0x1193e, 0x1193e}, // Dives Akuru Virama ..Dives Akuru Virama
{0x11943, 0x11943}, // Dives Akuru Sign Nukta ..Dives Akuru Sign Nukta
{0x119d4, 0x119d7}, // Nandinagari Vowel Sign U..Nandinagari Vowel Sign V
{0x119da, 0x119db}, // Nandinagari Vowel Sign E..Nandinagari Vowel Sign A
{0x119e0, 0x119e0}, // Nandinagari Sign Virama ..Nandinagari Sign Virama
{0x11a01, 0x11a0a}, // Zanabazar Square Vowel S..Zanabazar Square Vowel L
{0x11a33, 0x11a38}, // Zanabazar Square Final C..Zanabazar Square Sign An
{0x11a3b, 0x11a3e}, // Zanabazar Square Cluster..Zanabazar Square Cluster
{0x11a47, 0x11a47}, // Zanabazar Square Subjoin..Zanabazar Square Subjoin
{0x11a51, 0x11a56}, // Soyombo Vowel Sign I ..Soyombo Vowel Sign Oe
{0x11a59, 0x11a5b}, // Soyombo Vowel Sign Vocal..Soyombo Vowel Length Mar
{0x11a8a, 0x11a96}, // Soyombo Final Consonant ..Soyombo Sign Anusvara
{0x11a98, 0x11a99}, // Soyombo Gemination Mark ..Soyombo Subjoiner
{0x11c30, 0x11c36}, // Bhaiksuki Vowel Sign I ..Bhaiksuki Vowel Sign Voc
{0x11c38, 0x11c3d}, // Bhaiksuki Vowel Sign E ..Bhaiksuki Sign Anusvara
{0x11c3f, 0x11c3f}, // Bhaiksuki Sign Virama ..Bhaiksuki Sign Virama
{0x11c92, 0x11ca7}, // Marchen Subjoined Letter..Marchen Subjoined Letter
{0x11caa, 0x11cb0}, // Marchen Subjoined Letter..Marchen Vowel Sign Aa
{0x11cb2, 0x11cb3}, // Marchen Vowel Sign U ..Marchen Vowel Sign E
{0x11cb5, 0x11cb6}, // Marchen Sign Anusvara ..Marchen Sign Candrabindu
{0x11d31, 0x11d36}, // Masaram Gondi Vowel Sign..Masaram Gondi Vowel Sign
{0x11d3a, 0x11d3a}, // Masaram Gondi Vowel Sign..Masaram Gondi Vowel Sign
{0x11d3c, 0x11d3d}, // Masaram Gondi Vowel Sign..Masaram Gondi Vowel Sign
{0x11d3f, 0x11d45}, // Masaram Gondi Vowel Sign..Masaram Gondi Virama
{0x11d47, 0x11d47}, // Masaram Gondi Ra-kara ..Masaram Gondi Ra-kara
{0x11d90, 0x11d91}, // Gunjala Gondi Vowel Sign..Gunjala Gondi Vowel Sign
{0x11d95, 0x11d95}, // Gunjala Gondi Sign Anusv..Gunjala Gondi Sign Anusv
{0x11d97, 0x11d97}, // Gunjala Gondi Virama ..Gunjala Gondi Virama
{0x11ef3, 0x11ef4}, // Makasar Vowel Sign I ..Makasar Vowel Sign U
{0x11f00, 0x11f01}, // (nil) ..(nil)
{0x11f36, 0x11f3a}, // (nil) ..(nil)
{0x11f40, 0x11f40}, // (nil) ..(nil)
{0x11f42, 0x11f42}, // (nil) ..(nil)
{0x13440, 0x13440}, // (nil) ..(nil)
{0x13447, 0x13455}, // (nil) ..(nil)
{0x16af0, 0x16af4}, // Bassa Vah Combining High..Bassa Vah Combining High
{0x16b30, 0x16b36}, // Pahawh Hmong Mark Cim Tu..Pahawh Hmong Mark Cim Ta
{0x16f4f, 0x16f4f}, // Miao Sign Consonant Modi..Miao Sign Consonant Modi
{0x16f8f, 0x16f92}, // Miao Tone Right ..Miao Tone Below
{0x16fe4, 0x16fe4}, // Khitan Small Script Fill..Khitan Small Script Fill
{0x1bc9d, 0x1bc9e}, // Duployan Thick Letter Se..Duployan Double Mark
{0x1cf00, 0x1cf2d}, // Znamenny Combining Mark ..Znamenny Combining Mark
{0x1cf30, 0x1cf46}, // Znamenny Combining Tonal..Znamenny Priznak Modifie
{0x1d167, 0x1d169}, // Musical Symbol Combining..Musical Symbol Combining
{0x1d17b, 0x1d182}, // Musical Symbol Combining..Musical Symbol Combining
{0x1d185, 0x1d18b}, // Musical Symbol Combining..Musical Symbol Combining
{0x1d1aa, 0x1d1ad}, // Musical Symbol Combining..Musical Symbol Combining
{0x1d242, 0x1d244}, // Combining Greek Musical ..Combining Greek Musical
{0x1da00, 0x1da36}, // Signwriting Head Rim ..Signwriting Air Sucking
{0x1da3b, 0x1da6c}, // Signwriting Mouth Closed..Signwriting Excitement
{0x1da75, 0x1da75}, // Signwriting Upper Body T..Signwriting Upper Body T
{0x1da84, 0x1da84}, // Signwriting Location Hea..Signwriting Location Hea
{0x1da9b, 0x1da9f}, // Signwriting Fill Modifie..Signwriting Fill Modifie
{0x1daa1, 0x1daaf}, // Signwriting Rotation Mod..Signwriting Rotation Mod
{0x1e000, 0x1e006}, // Combining Glagolitic Let..Combining Glagolitic Let
{0x1e008, 0x1e018}, // Combining Glagolitic Let..Combining Glagolitic Let
{0x1e01b, 0x1e021}, // Combining Glagolitic Let..Combining Glagolitic Let
{0x1e023, 0x1e024}, // Combining Glagolitic Let..Combining Glagolitic Let
{0x1e026, 0x1e02a}, // Combining Glagolitic Let..Combining Glagolitic Let
{0x1e08f, 0x1e08f}, // (nil) ..(nil)
{0x1e130, 0x1e136}, // Nyiakeng Puachue Hmong T..Nyiakeng Puachue Hmong T
{0x1e2ae, 0x1e2ae}, // Toto Sign Rising Tone ..Toto Sign Rising Tone
{0x1e2ec, 0x1e2ef}, // Wancho Tone Tup ..Wancho Tone Koini
{0x1e4ec, 0x1e4ef}, // (nil) ..(nil)
{0x1e8d0, 0x1e8d6}, // Mende Kikakui Combining ..Mende Kikakui Combining
{0x1e944, 0x1e94a}, // Adlam Alif Lengthener ..Adlam Nukta
{0xe0100, 0xe01ef}, // Variation Selector-17 ..Variation Selector-256
};
// https://github.com/jquast/wcwidth/blob/master/wcwidth/table_wide.py
// from https://github.com/jquast/wcwidth/pull/64
// at commit 1b9b6585b0080ea5cb88dc9815796505724793fe (2022-12-16):
static struct width_interval WIDE_EASTASIAN[] = {
{0x01100, 0x0115f}, // Hangul Choseong Kiyeok ..Hangul Choseong Filler
{0x0231a, 0x0231b}, // Watch ..Hourglass
{0x02329, 0x0232a}, // Left-pointing Angle Brac..Right-pointing Angle Bra
{0x023e9, 0x023ec}, // Black Right-pointing Dou..Black Down-pointing Doub
{0x023f0, 0x023f0}, // Alarm Clock ..Alarm Clock
{0x023f3, 0x023f3}, // Hourglass With Flowing S..Hourglass With Flowing S
{0x025fd, 0x025fe}, // White Medium Small Squar..Black Medium Small Squar
{0x02614, 0x02615}, // Umbrella With Rain Drops..Hot Beverage
{0x02648, 0x02653}, // Aries ..Pisces
{0x0267f, 0x0267f}, // Wheelchair Symbol ..Wheelchair Symbol
{0x02693, 0x02693}, // Anchor ..Anchor
{0x026a1, 0x026a1}, // High Voltage Sign ..High Voltage Sign
{0x026aa, 0x026ab}, // Medium White Circle ..Medium Black Circle
{0x026bd, 0x026be}, // Soccer Ball ..Baseball
{0x026c4, 0x026c5}, // Snowman Without Snow ..Sun Behind Cloud
{0x026ce, 0x026ce}, // Ophiuchus ..Ophiuchus
{0x026d4, 0x026d4}, // No Entry ..No Entry
{0x026ea, 0x026ea}, // Church ..Church
{0x026f2, 0x026f3}, // Fountain ..Flag In Hole
{0x026f5, 0x026f5}, // Sailboat ..Sailboat
{0x026fa, 0x026fa}, // Tent ..Tent
{0x026fd, 0x026fd}, // Fuel Pump ..Fuel Pump
{0x02705, 0x02705}, // White Heavy Check Mark ..White Heavy Check Mark
{0x0270a, 0x0270b}, // Raised Fist ..Raised Hand
{0x02728, 0x02728}, // Sparkles ..Sparkles
{0x0274c, 0x0274c}, // Cross Mark ..Cross Mark
{0x0274e, 0x0274e}, // Negative Squared Cross M..Negative Squared Cross M
{0x02753, 0x02755}, // Black Question Mark Orna..White Exclamation Mark O
{0x02757, 0x02757}, // Heavy Exclamation Mark S..Heavy Exclamation Mark S
{0x02795, 0x02797}, // Heavy Plus Sign ..Heavy Division Sign
{0x027b0, 0x027b0}, // Curly Loop ..Curly Loop
{0x027bf, 0x027bf}, // Double Curly Loop ..Double Curly Loop
{0x02b1b, 0x02b1c}, // Black Large Square ..White Large Square
{0x02b50, 0x02b50}, // White Medium Star ..White Medium Star
{0x02b55, 0x02b55}, // Heavy Large Circle ..Heavy Large Circle
{0x02e80, 0x02e99}, // Cjk Radical Repeat ..Cjk Radical Rap
{0x02e9b, 0x02ef3}, // Cjk Radical Choke ..Cjk Radical C-simplified
{0x02f00, 0x02fd5}, // Kangxi Radical One ..Kangxi Radical Flute
{0x02ff0, 0x02ffb}, // Ideographic Description ..Ideographic Description
{0x03000, 0x0303e}, // Ideographic Space ..Ideographic Variation In
{0x03041, 0x03096}, // Hiragana Letter Small A ..Hiragana Letter Small Ke
{0x03099, 0x030ff}, // Combining Katakana-hirag..Katakana Digraph Koto
{0x03105, 0x0312f}, // Bopomofo Letter B ..Bopomofo Letter Nn
{0x03131, 0x0318e}, // Hangul Letter Kiyeok ..Hangul Letter Araeae
{0x03190, 0x031e3}, // Ideographic Annotation L..Cjk Stroke Q
{0x031f0, 0x0321e}, // Katakana Letter Small Ku..Parenthesized Korean Cha
{0x03220, 0x03247}, // Parenthesized Ideograph ..Circled Ideograph Koto
{0x03250, 0x04dbf}, // Partnership Sign ..Cjk Unified Ideograph-4d
{0x04e00, 0x0a48c}, // Cjk Unified Ideograph-4e..Yi Syllable Yyr
{0x0a490, 0x0a4c6}, // Yi Radical Qot ..Yi Radical Ke
{0x0a960, 0x0a97c}, // Hangul Choseong Tikeut-m..Hangul Choseong Ssangyeo
{0x0ac00, 0x0d7a3}, // Hangul Syllable Ga ..Hangul Syllable Hih
{0x0f900, 0x0faff}, // Cjk Compatibility Ideogr..(nil)
{0x0fe10, 0x0fe19}, // Presentation Form For Ve..Presentation Form For Ve
{0x0fe30, 0x0fe52}, // Presentation Form For Ve..Small Full Stop
{0x0fe54, 0x0fe66}, // Small Semicolon ..Small Equals Sign
{0x0fe68, 0x0fe6b}, // Small Reverse Solidus ..Small Commercial At
{0x0ff01, 0x0ff60}, // Fullwidth Exclamation Ma..Fullwidth Right White Pa
{0x0ffe0, 0x0ffe6}, // Fullwidth Cent Sign ..Fullwidth Won Sign
{0x16fe0, 0x16fe4}, // Tangut Iteration Mark ..Khitan Small Script Fill
{0x16ff0, 0x16ff1}, // Vietnamese Alternate Rea..Vietnamese Alternate Rea
{0x17000, 0x187f7}, // (nil) ..(nil)
{0x18800, 0x18cd5}, // Tangut Component-001 ..Khitan Small Script Char
{0x18d00, 0x18d08}, // (nil) ..(nil)
{0x1aff0, 0x1aff3}, // Katakana Letter Minnan T..Katakana Letter Minnan T
{0x1aff5, 0x1affb}, // Katakana Letter Minnan T..Katakana Letter Minnan N
{0x1affd, 0x1affe}, // Katakana Letter Minnan N..Katakana Letter Minnan N
{0x1b000, 0x1b122}, // Katakana Letter Archaic ..Katakana Letter Archaic
{0x1b132, 0x1b132}, // (nil) ..(nil)
{0x1b150, 0x1b152}, // Hiragana Letter Small Wi..Hiragana Letter Small Wo
{0x1b155, 0x1b155}, // (nil) ..(nil)
{0x1b164, 0x1b167}, // Katakana Letter Small Wi..Katakana Letter Small N
{0x1b170, 0x1b2fb}, // Nushu Character-1b170 ..Nushu Character-1b2fb
{0x1f004, 0x1f004}, // Mahjong Tile Red Dragon ..Mahjong Tile Red Dragon
{0x1f0cf, 0x1f0cf}, // Playing Card Black Joker..Playing Card Black Joker
{0x1f18e, 0x1f18e}, // Negative Squared Ab ..Negative Squared Ab
{0x1f191, 0x1f19a}, // Squared Cl ..Squared Vs
{0x1f200, 0x1f202}, // Square Hiragana Hoka ..Squared Katakana Sa
{0x1f210, 0x1f23b}, // Squared Cjk Unified Ideo..Squared Cjk Unified Ideo
{0x1f240, 0x1f248}, // Tortoise Shell Bracketed..Tortoise Shell Bracketed
{0x1f250, 0x1f251}, // Circled Ideograph Advant..Circled Ideograph Accept
{0x1f260, 0x1f265}, // Rounded Symbol For Fu ..Rounded Symbol For Cai
{0x1f300, 0x1f320}, // Cyclone ..Shooting Star
{0x1f32d, 0x1f335}, // Hot Dog ..Cactus
{0x1f337, 0x1f37c}, // Tulip ..Baby Bottle
{0x1f37e, 0x1f393}, // Bottle With Popping Cork..Graduation Cap
{0x1f3a0, 0x1f3ca}, // Carousel Horse ..Swimmer
{0x1f3cf, 0x1f3d3}, // Cricket Bat And Ball ..Table Tennis Paddle And
{0x1f3e0, 0x1f3f0}, // House Building ..European Castle
{0x1f3f4, 0x1f3f4}, // Waving Black Flag ..Waving Black Flag
{0x1f3f8, 0x1f43e}, // Badminton Racquet And Sh..Paw Prints
{0x1f440, 0x1f440}, // Eyes ..Eyes
{0x1f442, 0x1f4fc}, // Ear ..Videocassette
{0x1f4ff, 0x1f53d}, // Prayer Beads ..Down-pointing Small Red
{0x1f54b, 0x1f54e}, // Kaaba ..Menorah With Nine Branch
{0x1f550, 0x1f567}, // Clock Face One Oclock ..Clock Face Twelve-thirty
{0x1f57a, 0x1f57a}, // Man Dancing ..Man Dancing
{0x1f595, 0x1f596}, // Reversed Hand With Middl..Raised Hand With Part Be
{0x1f5a4, 0x1f5a4}, // Black Heart ..Black Heart
{0x1f5fb, 0x1f64f}, // Mount Fuji ..Person With Folded Hands
{0x1f680, 0x1f6c5}, // Rocket ..Left Luggage
{0x1f6cc, 0x1f6cc}, // Sleeping Accommodation ..Sleeping Accommodation
{0x1f6d0, 0x1f6d2}, // Place Of Worship ..Shopping Trolley
{0x1f6d5, 0x1f6d7}, // Hindu Temple ..Elevator
{0x1f6dc, 0x1f6df}, // (nil) ..Ring Buoy
{0x1f6eb, 0x1f6ec}, // Airplane Departure ..Airplane Arriving
{0x1f6f4, 0x1f6fc}, // Scooter ..Roller Skate
{0x1f7e0, 0x1f7eb}, // Large Orange Circle ..Large Brown Square
{0x1f7f0, 0x1f7f0}, // Heavy Equals Sign ..Heavy Equals Sign
{0x1f90c, 0x1f93a}, // Pinched Fingers ..Fencer
{0x1f93c, 0x1f945}, // Wrestlers ..Goal Net
{0x1f947, 0x1f9ff}, // First Place Medal ..Nazar Amulet
{0x1fa70, 0x1fa7c}, // Ballet Shoes ..Crutch
{0x1fa80, 0x1fa88}, // Yo-yo ..(nil)
{0x1fa90, 0x1fabd}, // Ringed Planet ..(nil)
{0x1fabf, 0x1fac5}, // (nil) ..Person With Crown
{0x1face, 0x1fadb}, // (nil) ..(nil)
{0x1fae0, 0x1fae8}, // Melting Face ..(nil)
{0x1faf0, 0x1faf8}, // Hand With Index Finger A..(nil)
{0x20000, 0x2fffd}, // Cjk Unified Ideograph-20..(nil)
{0x30000, 0x3fffd}, // Cjk Unified Ideograph-30..(nil)
};
static bool intable(struct width_interval* table, int table_length, int c) {
// First quick check for Latin1 etc. characters.
if (c < table[0].start) return false;
// Binary search in table.
int bot = 0;
int top = table_length - 1;
while (top >= bot) {
int mid = (bot + top) / 2;
if (table[mid].end < c) {
bot = mid + 1;
} else if (table[mid].start > c) {
top = mid - 1;
} else {
return true;
}
}
return false;
}
int wcwidth(wchar_t ucs) {
// NOTE: created by hand, there isn't anything identifiable other than
// general Cf category code to identify these, and some characters in Cf
// category code are of non-zero width.
if (ucs == 0 ||
ucs == 0x034F ||
(0x200B <= ucs && ucs <= 0x200F) ||
ucs == 0x2028 ||
ucs == 0x2029 ||
(0x202A <= ucs && ucs <= 0x202E) ||
(0x2060 <= ucs && ucs <= 0x2063)) {
return 0;
}
// C0/C1 control characters.
if (ucs < 32 || (0x07F <= ucs && ucs < 0x0A0)) return -1;
// Combining characters with zero width.
if (intable(ZERO_WIDTH, sizeof(ZERO_WIDTH)/sizeof(struct width_interval), ucs)) return 0;
return intable(WIDE_EASTASIAN, sizeof(WIDE_EASTASIAN)/sizeof(struct width_interval), ucs) ? 2 : 1;
}