import terminal
import strutils
import unicode
import tables
import json
import os
import math
import sugar
import sequtils
when defined(posix):
import posix
func ansiStyle*(str: string, style: Style): seq[string] =
result &= ansiStyleCode(style)
result &= str
func ansiFgColor*(str: string, color: ForegroundColor): seq[string] =
result &= ansiForegroundColorCode(color)
result &= str
func ansiReset*(str: string): seq[string] =
result &= str
result &= ansiResetCode
func ansiStyle*(str: seq[string], style: Style): seq[string] =
return ansiStyleCode(style) & str
func ansiFgColor*(str: seq[string], color: ForegroundColor): seq[string] =
return ansiForegroundColorCode(color) & str
func ansiReset*(str: seq[string]): seq[string] =
return str & ansiResetCode
func maxString*(str: string, max: int): string =
if max < str.runeLen():
return str.runeSubstr(0, max - 2) & "$"
return str
func fitValueToSize*(str: string, size: int): string =
if str.runeLen < size:
return str & ' '.repeat(size - str.runeLen)
return str.maxString(size)
func isWhitespace*(c: char): bool =
return c in {' ', '\n', '\r', '\t', '\f'}
func isControlChar*(c: char): bool =
return c in {chr(0x00)..chr(0x1F), chr(0x7F)}
func isControlChar*(r: Rune): bool =
case r
of Rune(0x00)..Rune(0x1F): return true
of Rune(0x7F): return true
else: return false
func genControlCharMap*(): string =
for c in low(char)..high(char):
if c == '?':
result &= char(127)
else:
result &= char((int(c) and 0x1f))
const controlCharMap = genControlCharMap()
func getControlChar*(c: char): char =
return controlCharMap[int(c)]
func genControlLetterMap*(): string =
for c in low(char)..high(char):
if c == char(127):
result &= '?'
else:
result &= char((int(c) or 0x40))
const controlLetterMap = genControlLetterMap()
func getControlLetter*(c: char): char =
return controlLetterMap[int(c)]
func findChar*(str: string, c: char, start: int = 0): int =
var i = start
while i < str.len:
if str[i] == c:
return i
inc i
return -1
func findChar*(str: string, c: Rune, start: int = 0): int =
var i = start
var n = i
while i < str.runeLen():
var r: Rune
fastRuneAt(str, n, r)
if r == c:
return i
i = n
return -1
func getLowerChars*(): string =
result = ""
for i in 0..255:
if chr(i) >= 'A' and chr(i) <= 'Z':
result &= chr(i + 32)
else:
result &= chr(i)
const lowerChars = getLowerChars()
func tolower*(c: char): char =
return lowerChars[int(c)]
const breakWord = [
Rune('\n'), Rune('/'), Rune('\\'), Rune(' '), Rune('&'), Rune('='),
Rune('?'), Rune('.'), Rune(';')
]
func genHexCharMap(): seq[int] =
for i in 0..255:
case chr(i)
of '0'..'9': result &= i - ord('0')
of 'a'..'f': result &= i - ord('a') + 10
of 'A'..'F': result &= i - ord('A') + 10
else: result &= -1
func genDecCharMap(): seq[int] =
for i in 0..255:
case chr(i)
of '0'..'9': result &= i - ord('0')
else: result &= -1
const hexCharMap = genHexCharMap()
const decCharMap = genDecCharMap()
func hexValue*(c: char): int =
return hexCharMap[int(c)]
func decValue*(c: char): int =
return decCharMap[int(c)]
func isAscii*(r: Rune): bool =
return int(r) < 128
func hexValue*(r: Rune): int =
if int(r) < 256:
return hexValue(char(r))
return -1
func decValue*(r: Rune): int =
if int(r) < 256:
return decValue(char(r))
return -1
func equalsIgnoreCase*(s1: seq[Rune], s2: string): bool =
var i = 0
while i < min(s1.len, s2.len):
if not s1[i].isAscii() or cast[char](s1[i]).tolower() != s2[i]:
return false
inc i
return true
func breaksWord*(r: Rune): bool =
return r in breakWord
func isAlphaAscii*(r: Rune): bool =
return int(r) < 256 and isAlphaAscii(char(r))
func isDigitAscii*(r: Rune): bool =
return int(r) < 256 and isDigit(char(r))
func substr*(s: seq[Rune], i: int, j: int): seq[Rune] =
if s.len == 0:
return @[]
return s[min(high(s), i)..min(high(s), j - 1)]
func substr*(s: seq[Rune], i: int): seq[Rune] =
if i > high(s) or s.len == 0:
return @[]
return s[min(high(s), i)..high(s)]
func skipBlanks*(buf: string, at: int): int =
result = at
while result < buf.len and buf[result].isWhitespace():
inc result
func number_additive*(i: int, range: HSlice[int, int], symbols: openarray[(int, string)]): string =
if i notin range:
return $i
var n = i
let o = n
var at = 0
while n > 0:
if n >= symbols[at][0]:
n -= symbols[at][0]
result &= symbols[at][1]
continue
inc at
return result
const romanNumbers = [
(1000, "M"), (900, "CM"), (500, "D"), (400, "CD"), (100, "C"), (90, "XC"), (50, "L"),
(40, "XL"), (10, "X"), (9, "IX"), (5, "V"), (4, "IV"), (1, "I")
]
const romanNumbers_lower = romanNumbers.map((x) => (x[0], x[1].tolower()))
func romanNumber*(i: int): string =
return number_additive(i, 1..3999, romanNumbers)
func romanNumber_lower*(i: int): string =
return number_additive(i, 1..3999, romanNumbers_lower)
func japaneseNumber*(i: int): string =
if i == 0:
return "〇"
var n = i
if i < 0:
result &= "マイナス"
n *= -1
let o = n
var ss: seq[string]
var d = 0
while n > 0:
let m = n mod 10
if m != 0:
case d
of 1: ss.add("十")
of 2: ss.add("百")
of 3: ss.add("千")
of 4:
ss.add("万")
ss.add("一")
of 5:
ss.add("万")
ss.add("十")
of 6:
ss.add("万")
ss.add("百")
of 7:
ss.add("万")
ss.add("千")
ss.add("一")
of 8:
ss.add("億")
ss.add("一")
of 9:
ss.add("億")
ss.add("十")
else: discard
case m
of 0:
inc d
n = n div 10
of 1:
if o == n:
ss.add("一")
of 2: ss.add("二")
of 3: ss.add("三")
of 4: ss.add("四")
of 5: ss.add("五")
of 6: ss.add("六")
of 7: ss.add("七")
of 8: ss.add("八")
of 9: ss.add("九")
else: discard
n -= m
n = ss.len - 1
while n >= 0:
result &= ss[n]
dec n
func parseInt32*(s: string): int =
var sign = 1
var t = 1
var integer: int = 0
var e: int = 0
var i = 0
if i < s.len and s[i] == '-':
sign = -1
inc i
elif i < s.len and s[i] == '+':
inc i
while i < s.len and isDigit(s[i]):
integer *= 10
integer += decValue(s[i])
inc i
if i < s.len and (s[i] == 'e' or s[i] == 'E'):
inc i
if i < s.len and s[i] == '-':
t = -1
inc i
elif i < s.len and s[i] == '+':
inc i
while i < s.len and isDigit(s[i]):
e *= 10
e += decValue(s[i])
inc i
return sign * integer * 10 ^ (t * e)
func parseInt64*(s: string): int64 =
var sign = 1
var t = 1
var integer: int64 = 0
var e: int64 = 0
var i = 0
if i < s.len and s[i] == '-':
sign = -1
inc i
elif i < s.len and s[i] == '+':
inc i
while i < s.len and isDigit(s[i]):
integer *= 10
integer += decValue(s[i])
inc i
if i < s.len and (s[i] == 'e' or s[i] == 'E'):
inc i
if i < s.len and s[i] == '-':
t = -1
inc i
elif i < s.len and s[i] == '+':
inc i
while i < s.len and isDigit(s[i]):
e *= 10
e += decValue(s[i])
inc i
return sign * integer * 10 ^ (t * e)
func parseFloat64*(s: string): float64 =
var sign = 1
var t = 1
var d = 0
var integer: float64 = 0
var f: float64 = 0
var e: float64 = 0
var i = 0
if i < s.len and s[i] == '-':
sign = -1
inc i
elif i < s.len and s[i] == '+':
inc i
while i < s.len and isDigit(s[i]):
integer *= 10
integer += float64(decValue(s[i]))
inc i
if i < s.len and s[i] == '.':
inc i
while i < s.len and isDigit(s[i]):
f *= 10
f += float64(decValue(s[i]))
inc i
inc d
if i < s.len and (s[i] == 'e' or s[i] == 'E'):
inc i
if i < s.len and s[i] == '-':
t = -1
inc i
elif i < s.len and s[i] == '+':
inc i
while i < s.len and isDigit(s[i]):
e *= 10
e += float64(decValue(s[i]))
inc i
return float64(sign) * (integer + f * pow(10, float64(-d))) * pow(10, (float64(t) * e))
proc expandPath*(path: string): string =
if path.len == 0:
return path
result = path
var i = 0
if path[0] == '~':
if path.len == 1:
result = getHomeDir()
elif path[1] == '/':
result = getHomeDir() / path.substr(2)
inc i
else:
when defined(posix):
i = 1
var usr = ""
while path[i] != '/':
usr &= path[i]
inc i
let p = getpwnam(usr)
if p != nil:
result = $p.pw_dir / path.substr(i)
template CSI*(s: varargs[string, `$`]): string =
var r = "\e["
var first = true
for x in s:
if not first:
r &= ";"
first = false
r &= x
r
template SGR*(s: varargs[string, `$`]): string =
CSI(s) & "m"
template HVP*(s: varargs[string, `$`]): string =
CSI(s) & "f"
template EL*(s: varargs[string, `$`]): string =
CSI(s) & "K"
iterator split*(s: seq[Rune], sep: Rune): seq[Rune] =
var i = 0
var prev = 0
while i < s.len:
if s[i] == sep:
yield s.substr(prev, i)
prev = i
inc i
if prev < i:
yield s.substr(prev, i)
# Measure length of runes. From https://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
#
# 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 0
#
# - 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.
#
# sorted list of non-overlapping intervals of non-spacing characters generated
# by "uniset +cat=Me +cat=Mn +cat=Cf -00AD +1160-11FF +200B c"
const combining = [
( 0x0300, 0x036F ), ( 0x0483, 0x0486 ), ( 0x0488, 0x0489 ),
( 0x0591, 0x05BD ), ( 0x05BF, 0x05BF ), ( 0x05C1, 0x05C2 ),
( 0x05C4, 0x05C5 ), ( 0x05C7, 0x05C7 ), ( 0x0600, 0x0603 ),
( 0x0610, 0x0615 ), ( 0x064B, 0x065E ), ( 0x0670, 0x0670 ),
( 0x06D6, 0x06E4 ), ( 0x06E7, 0x06E8 ), ( 0x06EA, 0x06ED ),
( 0x070F, 0x070F ), ( 0x0711, 0x0711 ), ( 0x0730, 0x074A ),
( 0x07A6, 0x07B0 ), ( 0x07EB, 0x07F3 ), ( 0x0901, 0x0902 ),
( 0x093C, 0x093C ), ( 0x0941, 0x0948 ), ( 0x094D, 0x094D ),
( 0x0951, 0x0954 ), ( 0x0962, 0x0963 ), ( 0x0981, 0x0981 ),
( 0x09BC, 0x09BC ), ( 0x09C1, 0x09C4 ), ( 0x09CD, 0x09CD ),
( 0x09E2, 0x09E3 ), ( 0x0A01, 0x0A02 ), ( 0x0A3C, 0x0A3C ),
( 0x0A41, 0x0A42 ), ( 0x0A47, 0x0A48 ), ( 0x0A4B, 0x0A4D ),
( 0x0A70, 0x0A71 ), ( 0x0A81, 0x0A82 ), ( 0x0ABC, 0x0ABC ),
( 0x0AC1, 0x0AC5 ), ( 0x0AC7, 0x0AC8 ), ( 0x0ACD, 0x0ACD ),
( 0x0AE2, 0x0AE3 ), ( 0x0B01, 0x0B01 ), ( 0x0B3C, 0x0B3C ),
( 0x0B3F, 0x0B3F ), ( 0x0B41, 0x0B43 ), ( 0x0B4D, 0x0B4D ),
( 0x0B56, 0x0B56 ), ( 0x0B82, 0x0B82 ), ( 0x0BC0, 0x0BC0 ),
( 0x0BCD, 0x0BCD ), ( 0x0C3E, 0x0C40 ), ( 0x0C46, 0x0C48 ),
( 0x0C4A, 0x0C4D ), ( 0x0C55, 0x0C56 ), ( 0x0CBC, 0x0CBC ),
( 0x0CBF, 0x0CBF ), ( 0x0CC6, 0x0CC6 ), ( 0x0CCC, 0x0CCD ),
( 0x0CE2, 0x0CE3 ), ( 0x0D41, 0x0D43 ), ( 0x0D4D, 0x0D4D ),
( 0x0DCA, 0x0DCA ), ( 0x0DD2, 0x0DD4 ), ( 0x0DD6, 0x0DD6 ),
( 0x0E31, 0x0E31 ), ( 0x0E34, 0x0E3A ), ( 0x0E47, 0x0E4E ),
( 0x0EB1, 0x0EB1 ), ( 0x0EB4, 0x0EB9 ), ( 0x0EBB, 0x0EBC ),
( 0x0EC8, 0x0ECD ), ( 0x0F18, 0x0F19 ), ( 0x0F35, 0x0F35 ),
( 0x0F37, 0x0F37 ), ( 0x0F39, 0x0F39 ), ( 0x0F71, 0x0F7E ),
( 0x0F80, 0x0F84 ), ( 0x0F86, 0x0F87 ), ( 0x0F90, 0x0F97 ),
( 0x0F99, 0x0FBC ), ( 0x0FC6, 0x0FC6 ), ( 0x102D, 0x1030 ),
( 0x1032, 0x1032 ), ( 0x1036, 0x1037 ), ( 0x1039, 0x1039 ),
( 0x1058, 0x1059 ), ( 0x1160, 0x11FF ), ( 0x135F, 0x135F ),
( 0x1712, 0x1714 ), ( 0x1732, 0x1734 ), ( 0x1752, 0x1753 ),
( 0x1772, 0x1773 ), ( 0x17B4, 0x17B5 ), ( 0x17B7, 0x17BD ),
( 0x17C6, 0x17C6 ), ( 0x17C9, 0x17D3 ), ( 0x17DD, 0x17DD ),
( 0x180B, 0x180D ), ( 0x18A9, 0x18A9 ), ( 0x1920, 0x1922 ),
( 0x1927, 0x1928 ), ( 0x1932, 0x1932 ), ( 0x1939, 0x193B ),
( 0x1A17, 0x1A18 ), ( 0x1B00, 0x1B03 ), ( 0x1B34, 0x1B34 ),
( 0x1B36, 0x1B3A ), ( 0x1B3C, 0x1B3C ), ( 0x1B42, 0x1B42 ),
( 0x1B6B, 0x1B73 ), ( 0x1DC0, 0x1DCA ), ( 0x1DFE, 0x1DFF ),
( 0x200B, 0x200F ), ( 0x202A, 0x202E ), ( 0x2060, 0x2063 ),
( 0x206A, 0x206F ), ( 0x20D0, 0x20EF ), ( 0x302A, 0x302F ),
( 0x3099, 0x309A ), ( 0xA806, 0xA806 ), ( 0xA80B, 0xA80B ),
( 0xA825, 0xA826 ), ( 0xFB1E, 0xFB1E ), ( 0xFE00, 0xFE0F ),
( 0xFE20, 0xFE23 ), ( 0xFEFF, 0xFEFF ), ( 0xFFF9, 0xFFFB ),
( 0x10A01, 0x10A03 ), ( 0x10A05, 0x10A06 ), ( 0x10A0C, 0x10A0F ),
( 0x10A38, 0x10A3A ), ( 0x10A3F, 0x10A3F ), ( 0x1D167, 0x1D169 ),
( 0x1D173, 0x1D182 ), ( 0x1D185, 0x1D18B ), ( 0x1D1AA, 0x1D1AD ),
( 0x1D242, 0x1D244 ), ( 0xE0001, 0xE0001 ), ( 0xE0020, 0xE007F ),
( 0xE0100, 0xE01EF )
]
func is_dwidth(r: Rune): bool =
let ucs = int(r)
return (ucs >= 0x1100 and
(ucs <= 0x115f or # Hangul Jamo init. consonants
ucs == 0x2329 or ucs == 0x232a or
(ucs >= 0x2e80 and ucs <= 0xa4cf and
ucs != 0x303f) or # CJK ... Yi
(ucs >= 0xac00 and ucs <= 0xd7a3) or # Hangul Syllables
(ucs >= 0xf900 and ucs <= 0xfaff) or # CJK Compatibility Ideographs
(ucs >= 0xfe10 and ucs <= 0xfe19) or # Vertical forms
(ucs >= 0xfe30 and ucs <= 0xfe6f) or # CJK Compatibility Forms
(ucs >= 0xff00 and ucs <= 0xff60) or # Fullwidth Forms
(ucs >= 0xffe0 and ucs <= 0xffe6) or
(ucs >= 0x20000 and ucs <= 0x2fffd) or
(ucs >= 0x30000 and ucs <= 0x3fffd)))
func makewidthtable(): array[0..0x10FFFF, byte] =
for r in low(char)..high(char):
if r.isControlChar():
result[int(r)] = 2 #TODO this should be 0
else:
result[int(r)] = 1
var i = 0
var next_combining = combining[i]
for ucs in 256..0x10FFFF:
if ucs >= next_combining[0]:
if ucs <= next_combining[1]:
result[ucs] = 0
continue
elif i + 1 < combining.len:
inc i
next_combining = combining[i]
if Rune(ucs).is_dwidth():
result[ucs] = 2
else:
result[ucs] = 1
# compute lookup table on startup
# TODO: we could have an option to store it in the executable but honestly I
# don't see the need to
let width_table = makewidthtable()
{.push boundChecks:off.}
func width*(r: Rune): int =
{.cast(noSideEffect).}:
return int(width_table[int(r)])
func width*(s: string): int =
for r in s.runes():
result += width(r)
func width*(s: seq[Rune]): int =
for r in s:
result += width(r)
func width*(s: seq[Rune], min: int, max: int): int =
var i = min
var mi = min(max, s.len)
while i < mi:
result += width(s[i])
inc i
func width*(s: seq[Rune], min: int): int =
var i = min
while i < s.len:
result += width(s[i])
inc i
# sorted list of non-overlapping intervals of East Asian Ambiguous characters,
# generated by "uniset +WIDTH-A -cat=Me -cat=Mn -cat=Cf c"
const ambiguous = [
( 0x00A1, 0x00A1 ), ( 0x00A4, 0x00A4 ), ( 0x00A7, 0x00A8 ),
( 0x00AA, 0x00AA ), ( 0x00AE, 0x00AE ), ( 0x00B0, 0x00B4 ),
( 0x00B6, 0x00BA ), ( 0x00BC, 0x00BF ), ( 0x00C6, 0x00C6 ),
( 0x00D0, 0x00D0 ), ( 0x00D7, 0x00D8 ), ( 0x00DE, 0x00E1 ),
( 0x00E6, 0x00E6 ), ( 0x00E8, 0x00EA ), ( 0x00EC, 0x00ED ),
( 0x00F0, 0x00F0 ), ( 0x00F2, 0x00F3 ), ( 0x00F7, 0x00FA ),
( 0x00FC, 0x00FC ), ( 0x00FE, 0x00FE ), ( 0x0101, 0x0101 ),
( 0x0111, 0x0111 ), ( 0x0113, 0x0113 ), ( 0x011B, 0x011B ),
( 0x0126, 0x0127 ), ( 0x012B, 0x012B ), ( 0x0131, 0x0133 ),
( 0x0138, 0x0138 ), ( 0x013F, 0x0142 ), ( 0x0144, 0x0144 ),
( 0x0148, 0x014B ), ( 0x014D, 0x014D ), ( 0x0152, 0x0153 ),
( 0x0166, 0x0167 ), ( 0x016B, 0x016B ), ( 0x01CE, 0x01CE ),
( 0x01D0, 0x01D0 ), ( 0x01D2, 0x01D2 ), ( 0x01D4, 0x01D4 ),
( 0x01D6, 0x01D6 ), ( 0x01D8, 0x01D8 ), ( 0x01DA, 0x01DA ),
( 0x01DC, 0x01DC ), ( 0x0251, 0x0251 ), ( 0x0261, 0x0261 ),
( 0x02C4, 0x02C4 ), ( 0x02C7, 0x02C7 ), ( 0x02C9, 0x02CB ),
( 0x02CD, 0x02CD ), ( 0x02D0, 0x02D0 ), ( 0x02D8, 0x02DB ),
( 0x02DD, 0x02DD ), ( 0x02DF, 0x02DF ), ( 0x0391, 0x03A1 ),
( 0x03A3, 0x03A9 ), ( 0x03B1, 0x03C1 ), ( 0x03C3, 0x03C9 ),
( 0x0401, 0x0401 ), ( 0x0410, 0x044F ), ( 0x0451, 0x0451 ),
( 0x2010, 0x2010 ), ( 0x2013, 0x2016 ), ( 0x2018, 0x2019 ),
( 0x201C, 0x201D ), ( 0x2020, 0x2022 ), ( 0x2024, 0x2027 ),
( 0x2030, 0x2030 ), ( 0x2032, 0x2033 ), ( 0x2035, 0x2035 ),
( 0x203B, 0x203B ), ( 0x203E, 0x203E ), ( 0x2074, 0x2074 ),
( 0x207F, 0x207F ), ( 0x2081, 0x2084 ), ( 0x20AC, 0x20AC ),
( 0x2103, 0x2103 ), ( 0x2105, 0x2105 ), ( 0x2109, 0x2109 ),
( 0x2113, 0x2113 ), ( 0x2116, 0x2116 ), ( 0x2121, 0x2122 ),
( 0x2126, 0x2126 ), ( 0x212B, 0x212B ), ( 0x2153, 0x2154 ),
( 0x215B, 0x215E ), ( 0x2160, 0x216B ), ( 0x2170, 0x2179 ),
( 0x2190, 0x2199 ), ( 0x21B8, 0x21B9 ), ( 0x21D2, 0x21D2 ),
( 0x21D4, 0x21D4 ), ( 0x21E7, 0x21E7 ), ( 0x2200, 0x2200 ),
( 0x2202, 0x2203 ), ( 0x2207, 0x2208 ), ( 0x220B, 0x220B ),
( 0x220F, 0x220F ), ( 0x2211, 0x2211 ), ( 0x2215, 0x2215 ),
( 0x221A, 0x221A ), ( 0x221D, 0x2220 ), ( 0x2223, 0x2223 ),
( 0x2225, 0x2225 ), ( 0x2227, 0x222C ), ( 0x222E, 0x222E ),
( 0x2234, 0x2237 ), ( 0x223C, 0x223D ), ( 0x2248, 0x2248 ),
( 0x224C, 0x224C ), ( 0x2252, 0x2252 ), ( 0x2260, 0x2261 ),
( 0x2264, 0x2267 ), ( 0x226A, 0x226B ), ( 0x226E, 0x226F ),
( 0x2282, 0x2283 ), ( 0x2286, 0x2287 ), ( 0x2295, 0x2295 ),
( 0x2299, 0x2299 ), ( 0x22A5, 0x22A5 ), ( 0x22BF, 0x22BF ),
( 0x2312, 0x2312 ), ( 0x2460, 0x24E9 ), ( 0x24EB, 0x254B ),
( 0x2550, 0x2573 ), ( 0x2580, 0x258F ), ( 0x2592, 0x2595 ),
( 0x25A0, 0x25A1 ), ( 0x25A3, 0x25A9 ), ( 0x25B2, 0x25B3 ),
( 0x25B6, 0x25B7 ), ( 0x25BC, 0x25BD ), ( 0x25C0, 0x25C1 ),
( 0x25C6, 0x25C8 ), ( 0x25CB, 0x25CB ), ( 0x25CE, 0x25D1 ),
( 0x25E2, 0x25E5 ), ( 0x25EF, 0x25EF ), ( 0x2605, 0x2606 ),
( 0x2609, 0x2609 ), ( 0x260E, 0x260F ), ( 0x2614, 0x2615 ),
( 0x261C, 0x261C ), ( 0x261E, 0x261E ), ( 0x2640, 0x2640 ),
( 0x2642, 0x2642 ), ( 0x2660, 0x2661 ), ( 0x2663, 0x2665 ),
( 0x2667, 0x266A ), ( 0x266C, 0x266D ), ( 0x266F, 0x266F ),
( 0x273D, 0x273D ), ( 0x2776, 0x277F ), ( 0xE000, 0xF8FF ),
( 0xFFFD, 0xFFFD ), ( 0xF0000, 0xFFFFD ), ( 0x100000, 0x10FFFD )
]
#
# The following functions are the same as mk_wcwidth() and mk_wcswidth(),
# except that spacing characters in the East Asian Ambiguous (A) category as
# defined in Unicode Technical Report #11 have a column width of 2. This
# variant might be useful for users of CJK legacy encodings who want to migrate
# to UCS without changing the traditional terminal character-width behaviour.
# It is not otherwise recommended for general use.
#
# TODO: currently these are unused, the user should be able to toggle them
# auxiliary function for binary search in interval table
func bisearch(ucs: Rune, table: openarray[(int, int)]): bool =
var max = table.high
var min = 0
var mid: int
if int(ucs) < table[0][0] or int(ucs) > table[max][1]:
return false
while max >= min:
mid = (min + max) div 2
if int(ucs) > table[mid][1]:
min = mid + 1
elif int(ucs) < table[mid][0]:
max = mid - 1
else:
return true
return false
func mk_wcwidth_cjk(r: Rune): int =
# binary search in table of non-spacing characters
if bisearch(r, ambiguous):
return 2;
return r.width();
func mk_wcswidth_cjk(s: string): int =
for r in s.runes:
result += mk_wcwidth_cjk(r)
return result
const CanHaveDakuten = "かきくけこさしすせそたちつてとはひふへほカキクケコサシスセソタチツテトハヒフヘホ".toRunes()
const CanHaveHandakuten = "はひふへほハヒフヘホ".toRunes()
const HasDakuten = "がぎぐげござじずぜぞだぢづでどばびぶべぼガギグゲゴザジゼゾダヂヅデドバビブベボ".toRunes()
const HasHanDakuten = "ぱぴぷぺぽパピプペポ".toRunes()
#in unicode, char + 1 is dakuten and char + 2 handakuten
#ﾞﾟ
const HalfDakuten = "ﾞ".toRunes()[0]
const HalfHanDakuten = "ﾟ".toRunes()[0]
const Dakuten = Rune(0x3099)
const HanDakuten = Rune(0x309A)
func dakuten*(r: Rune): Rune =
if r in CanHaveDakuten:
return cast[Rune](cast[int](r) + 1)
return r
func handakuten*(r: Rune): Rune =
if r in CanHaveHandakuten:
return cast[Rune](cast[int](r) + 2)
func nodakuten*(r: Rune): Rune =
return cast[Rune](cast[int](r) - 1)
func nohandakuten*(r: Rune): Rune =
return cast[Rune](cast[int](r) - 2)
# Halfwidth to fullwidth & vice versa
const widthconv = staticRead"res/widthconv.json"
proc genHalfWidthTable(): Table[Rune, Rune] =
let widthconvjson = parseJson(widthconv)
for k, v in widthconvjson:
if v.kind == JString:
result[v.getStr().toRunes()[0]] = k.toRunes()[0]
else:
for s in v:
result[s.getStr().toRunes()[0]] = k.toRunes()[0]
proc genFullWidthTable(): Table[Rune, Rune] =
let widthconvjson = parseJson(widthconv)
for k, v in widthconvjson:
if v.kind == JString:
result[k.toRunes()[0]] = v.getStr().toRunes()[0]
else:
result[k.toRunes()[0]] = v[0].getStr().toRunes()[0]
const halfwidthtable = genHalfWidthTable()
const fullwidthtable = genFullWidthTable()
func halfwidth*(r: Rune): Rune =
return halfwidthtable.getOrDefault(r, r)
func halfwidth*(s: seq[Rune]): seq[Rune] =
for r in s:
#TODO combining dakuten don't always work with half width chars
#a proper solution would be something like:
#* try to detect if they work, if not fallback to halfwidth handakuten
#* add a config option for overriding this
#* also add an option to completely ignore dakuten
#* and one to disable half width ruby of course
if r in HasDakuten:
result.add(halfwidth(r.nodakuten()))
result.add(Dakuten)
elif r in HasHanDakuten:
result.add(halfwidth(r.nohandakuten()))
result.add(HanDakuten)
else:
result.add(halfwidth(r))
func halfwidth*(s: string): string =
return $halfwidth(s.toRunes())
func fullwidth*(r: Rune): Rune =
return fullwidthtable.getOrDefault(r, r)
proc fullwidth*(s: seq[Rune]): seq[Rune] =
for r in s:
if r == Rune(0xFF9E): #dakuten
if result.len > 0:
result[^1] = result[^1].dakuten()
else:
result.add(r)
elif r == Rune(0xFF9F): #handakuten
if result.len > 0:
result[^1] = result[^1].handakuten()
else:
result.add(r)
else:
result.add(fullwidth(r))
proc fullwidth*(s: string): string =
return $fullwidth(s.toRunes())