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" Script to extract tables from Unicode .txt files, to be used in src/mbyte.c.
" The format of the UnicodeData.txt file is explained here:
" http://www.unicode.org/Public/5.1.0/ucd/UCD.html
" For the other files see the header.
"
" Usage: Vim -S <this-file>
"
" Author: Bram Moolenaar
" Last Update: 2010 Jan 12
" Parse lines of UnicodeData.txt. Creates a list of lists in s:dataprops.
func! ParseDataToProps()
let s:dataprops = []
let lnum = 1
while lnum <= line('$')
let l = split(getline(lnum), '\s*;\s*', 1)
if len(l) != 15
echoerr 'Found ' . len(l) . ' items in line ' . lnum . ', expected 15'
return
endif
call add(s:dataprops, l)
let lnum += 1
endwhile
endfunc
" Parse lines of CaseFolding.txt. Creates a list of lists in s:foldprops.
func! ParseFoldProps()
let s:foldprops = []
let lnum = 1
while lnum <= line('$')
let line = getline(lnum)
if line !~ '^#' && line !~ '^\s*$'
let l = split(line, '\s*;\s*', 1)
if len(l) != 4
echoerr 'Found ' . len(l) . ' items in line ' . lnum . ', expected 4'
return
endif
call add(s:foldprops, l)
endif
let lnum += 1
endwhile
endfunc
" Parse lines of EastAsianWidth.txt. Creates a list of lists in s:widthprops.
func! ParseWidthProps()
let s:widthprops = []
let lnum = 1
while lnum <= line('$')
let line = getline(lnum)
if line !~ '^#' && line !~ '^\s*$'
let l = split(line, '\s*;\s*', 1)
if len(l) != 2
echoerr 'Found ' . len(l) . ' items in line ' . lnum . ', expected 2'
return
endif
call add(s:widthprops, l)
endif
let lnum += 1
endwhile
endfunc
" Build the toLower or toUpper table in a new buffer.
" Uses s:dataprops.
func! BuildCaseTable(name, index)
let start = -1
let end = -1
let step = 0
let add = -1
let ranges = []
for p in s:dataprops
if p[a:index] != ''
let n = ('0x' . p[0]) + 0
let nl = ('0x' . p[a:index]) + 0
if start >= 0 && add == nl - n && (step == 0 || n - end == step)
" continue with same range.
let step = n - end
let end = n
else
if start >= 0
" produce previous range
call Range(ranges, start, end, step, add)
endif
let start = n
let end = n
let step = 0
let add = nl - n
endif
endif
endfor
if start >= 0
call Range(ranges, start, end, step, add)
endif
" New buffer to put the result in.
new
exe "file to" . a:name
call setline(1, "static convertStruct to" . a:name . "[] =")
call setline(2, "{")
call append('$', ranges)
call setline('$', getline('$')[:-2]) " remove last comma
call setline(line('$') + 1, "};")
wincmd p
endfunc
" Build the foldCase table in a new buffer.
" Uses s:foldprops.
func! BuildFoldTable()
let start = -1
let end = -1
let step = 0
let add = -1
let ranges = []
for p in s:foldprops
if p[1] == 'C' || p[1] == 'S'
let n = ('0x' . p[0]) + 0
let nl = ('0x' . p[2]) + 0
if start >= 0 && add == nl - n && (step == 0 || n - end == step)
" continue with same range.
let step = n - end
let end = n
else
if start >= 0
" produce previous range
call Range(ranges, start, end, step, add)
endif
let start = n
let end = n
let step = 0
let add = nl - n
endif
endif
endfor
if start >= 0
call Range(ranges, start, end, step, add)
endif
" New buffer to put the result in.
new
file foldCase
call setline(1, "static convertStruct foldCase[] =")
call setline(2, "{")
call append('$', ranges)
call setline('$', getline('$')[:-2]) " remove last comma
call setline(line('$') + 1, "};")
wincmd p
endfunc
func! Range(ranges, start, end, step, add)
let s = printf("\t{0x%x,0x%x,%d,%d},", a:start, a:end, a:step == 0 ? -1 : a:step, a:add)
call add(a:ranges, s)
endfunc
" Build the combining table.
" Uses s:dataprops.
func! BuildCombiningTable()
let start = -1
let end = -1
let ranges = []
for p in s:dataprops
if p[2] == 'Mn' || p[2] == 'Mc' || p[2] == 'Me'
let n = ('0x' . p[0]) + 0
if start >= 0 && end + 1 == n
" continue with same range.
let end = n
else
if start >= 0
" produce previous range
call add(ranges, printf("\t{0x%04x, 0x%04x},", start, end))
endif
let start = n
let end = n
endif
endif
endfor
if start >= 0
call add(ranges, printf("\t{0x%04x, 0x%04x},", start, end))
endif
" New buffer to put the result in.
new
file combining
call setline(1, " static struct interval combining[] =")
call setline(2, " {")
call append('$', ranges)
call setline('$', getline('$')[:-2]) " remove last comma
call setline(line('$') + 1, " };")
wincmd p
endfunc
" Build the double width or ambiguous width table in a new buffer.
" Uses s:widthprops and s:dataprops.
func! BuildWidthTable(pattern, tableName)
let start = -1
let end = -1
let ranges = []
let dataidx = 0
for p in s:widthprops
if p[1][0] =~ a:pattern
if p[0] =~ '\.\.'
" It is a range. we don't check for composing char then.
let rng = split(p[0], '\.\.')
if len(rng) != 2
echoerr "Cannot parse range: '" . p[0] . "' in width table"
endif
let n = ('0x' . rng[0]) + 0
let n_last = ('0x' . rng[1]) + 0
else
let n = ('0x' . p[0]) + 0
let n_last = n
endif
" Find this char in the data table.
while 1
let dn = ('0x' . s:dataprops[dataidx][0]) + 0
if dn >= n
break
endif
let dataidx += 1
endwhile
if dn != n && n_last == n
echoerr "Cannot find character " . n . " in data table"
endif
" Only use the char when it's not a composing char.
" But use all chars from a range.
let dp = s:dataprops[dataidx]
if n_last > n || (dp[2] != 'Mn' && dp[2] != 'Mc' && dp[2] != 'Me')
if start >= 0 && end + 1 == n
" continue with same range.
else
if start >= 0
" produce previous range
call add(ranges, printf("\t{0x%04x, 0x%04x},", start, end))
endif
let start = n
endif
let end = n_last
endif
endif
endfor
if start >= 0
call add(ranges, printf("\t{0x%04x, 0x%04x},", start, end))
endif
" New buffer to put the result in.
new
exe "file " . a:tableName
call setline(1, " static struct interval " . a:tableName . "[] =")
call setline(2, " {")
call append('$', ranges)
call setline('$', getline('$')[:-2]) " remove last comma
call setline(line('$') + 1, " };")
wincmd p
endfunc
" Edit the Unicode text file. Requires the netrw plugin.
edit http://unicode.org/Public/UNIDATA/UnicodeData.txt
" Parse each line, create a list of lists.
call ParseDataToProps()
" Build the toLower table.
call BuildCaseTable("Lower", 13)
" Build the toUpper table.
call BuildCaseTable("Upper", 12)
" Build the ranges of composing chars.
call BuildCombiningTable()
" Edit the case folding text file. Requires the netrw plugin.
edit http://www.unicode.org/Public/UNIDATA/CaseFolding.txt
" Parse each line, create a list of lists.
call ParseFoldProps()
" Build the foldCase table.
call BuildFoldTable()
" Edit the width text file. Requires the netrw plugin.
edit http://www.unicode.org/Public/UNIDATA/EastAsianWidth.txt
" Parse each line, create a list of lists.
call ParseWidthProps()
" Build the double width table.
call BuildWidthTable('[WF]', 'doublewidth')
" Build the ambiguous width table.
call BuildWidthTable('A', 'ambiguous')
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