1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
import strutils, algorithm
let
# this file was obtained from:
# https://www.unicode.org/Public/UCD/latest/ucd/UnicodeData.txt
filename = "tools/UnicodeData.txt"
data = readFile(filename).strip.splitLines()
const
# see the table here:
# https://www.unicode.org/reports/tr44/#GC_Values_Table
letters = ["Lu", "Ll", "Lt", "Lm", "Lo"]
spaces = ["Zs", "Zl", "Zp"]
type
Ranges = tuple[start, stop, diff: int]
Singlets = tuple[code, diff: int]
NonLetterRanges = tuple[start, stop: int]
var
toUpper = newSeq[Singlets]()
toLower = newSeq[Singlets]()
toTitle = newSeq[Singlets]()
alphas = newSeq[int]()
unispaces = newSeq[int]()
proc parseData(data: seq[string]) =
for line in data:
let
fields = line.split(';')
code = fields[0].parseHexInt()
category = fields[2]
uc = fields[12]
lc = fields[13]
tc = fields[14]
if category notin spaces and category notin letters:
continue
if uc.len > 0:
let diff = 500 + uc.parseHexInt() - code
toUpper.add (code, diff)
if lc.len > 0:
let diff = 500 + lc.parseHexInt() - code
toLower.add (code, diff)
if tc.len > 0 and tc != uc:
# if titlecase is different than uppercase
let diff = 500 + tc.parseHexInt() - code
if diff != 500:
toTitle.add (code, diff)
if category in spaces:
unispaces.add code
else:
alphas.add code
proc splitRanges(a: seq[Singlets], r: var seq[Ranges], s: var seq[Singlets]) =
## Splits `toLower`, `toUpper` and `toTitle` into separate sequences:
## - `r` contains continuous ranges with the same characteristics
## (their upper/lower version is the same distance away)
## - `s` contains single code points
var i, j: int
while i < a.len:
j = 1
let
startCode = a[i].code
startDiff = a[i].diff
while i + j <= a.len:
if i+j >= a.len or a[i+j].code != startCode+j or a[i+j].diff != startDiff:
if j == 1:
s.add (startCode, startDiff)
else:
r.add (startCode, a[i+j-1].code, startDiff)
i += j-1
break
else:
inc j
inc i
proc splitRanges(a: seq[int], r: var seq[NonLetterRanges], s: var seq[int]) =
## Splits `alphas` and `unispaces` into separate sequences:
## - `r` contains continuous ranges
## - `s` contains single code points
var i, j: int
while i < a.len:
j = 1
let startCode = a[i]
while i + j <= a.len:
if i+j >= a.len or a[i+j] != startCode+j:
if j == 1:
s.add startCode
else:
r.add (startCode, a[i+j-1])
i += j-1
break
else:
inc j
inc i
proc splitSpaces(a: seq[int], r: var seq[NonLetterRanges], s: var seq[int]) =
## Spaces are special because of the way how `isWhiteSpace` and `split`
## are implemented.
##
## All spaces are added both to `r` (ranges) and `s` (singlets).
var i, j: int
while i < a.len:
j = 1
let startCode = a[i]
while i + j <= a.len:
if i+j >= a.len or a[i+j] != startCode+j:
r.add (startCode, a[i+j-1])
i += j-1
break
else:
inc j
inc i
s = a
var
toupperRanges = newSeq[Ranges]()
toupperSinglets = newSeq[Singlets]()
tolowerRanges = newSeq[Ranges]()
tolowerSinglets = newSeq[Singlets]()
totitleRanges = newSeq[Ranges]()
totitleSinglets = newSeq[Singlets]()
spaceRanges = newSeq[NonLetterRanges]()
unicodeSpaces = newSeq[int]()
alphaRanges = newSeq[NonLetterRanges]()
alphaSinglets = newSeq[int]()
parseData(data)
splitRanges(toLower, tolowerRanges, tolowerSinglets)
splitRanges(toUpper, toUpperRanges, toUpperSinglets)
splitRanges(toTitle, toTitleRanges, toTitleSinglets)
splitRanges(alphas, alphaRanges, alphaSinglets)
# manually add "special" spaces
for i in 9 .. 13:
unispaces.add i
unispaces.add 0x85
unispaces.sort()
splitSpaces(unispaces, spaceRanges, unicodeSpaces)
var output: string
proc createHeader(output: var string) =
output.add "# This file was created from a script.\n\n"
output.add "const\n"
proc `$`(r: Ranges): string =
let
start = "0x" & toHex(r.start, 5)
stop = "0x" & toHex(r.stop, 5)
result = "$#, $#, $#,\n" % [start, stop, $r.diff]
proc `$`(r: Singlets): string =
let code = "0x" & toHex(r.code, 5)
result = "$#, $#,\n" % [code, $r.diff]
proc `$`(r: NonLetterRanges): string =
let
start = "0x" & toHex(r.start, 5)
stop = "0x" & toHex(r.stop, 5)
result = "$#, $#,\n" % [start, stop]
proc outputSeq(s: seq[Ranges|Singlets|NonLetterRanges], name: string,
output: var string) =
output.add " $# = [\n" % name
for r in s:
output.add " " & $r
output.add " ]\n\n"
proc outputSeq(s: seq[int], name: string, output: var string) =
output.add " $# = [\n" % name
for i in s:
output.add " 0x$#,\n" % toHex(i, 5)
output.add " ]\n\n"
proc outputSpaces(s: seq[int], name: string, output: var string) =
output.add " $# = [\n" % name
for i in s:
output.add " Rune 0x$#,\n" % toHex(i, 5)
output.add " ]\n\n"
output.createHeader()
outputSeq(tolowerRanges, "toLowerRanges", output)
outputSeq(tolowerSinglets, "toLowerSinglets", output)
outputSeq(toupperRanges, "toUpperRanges", output)
outputSeq(toupperSinglets, "toUpperSinglets", output)
outputSeq(totitleSinglets, "toTitleSinglets", output)
outputSeq(alphaRanges, "alphaRanges", output)
outputSeq(alphaSinglets, "alphaSinglets", output)
outputSeq(spaceRanges, "spaceRanges", output)
outputSpaces(unispaces, "unicodeSpaces", output) # array of runes
let outfile = "lib/pure/includes/unicode_ranges.nim"
outfile.writeFile(output)
|
