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+--
+-- luatexja/charrange.lua
+--
+luatexbase.provides_module({
+ name = 'luatexja.charrange',
+ date = '2011/04/01',
+ version = '0.1',
+ description = 'Handling the range of Japanese characters',
+})
+module('luatexja.charrange', package.seeall)
+local err, warn, info, log = luatexbase.errwarinf(_NAME)
+
+luatexja.load_module('base'); local ltjb = luatexja.base
+
+local floor = math.floor
+local has_attr = node.has_attribute
+
+-- jcr_table_main[chr_code] = index
+-- index : internal 0, 1, 2, ..., 216 0: 'other'
+-- external 1 2 216, (out of range): 'other'
+
+-- initialize
+local jcr_table_main = {}
+local jcr_cjk = 0; local jcr_noncjk = 1; local ucs_out = 0x110000
+
+for i=0x80 ,0xFF do jcr_table_main[i]=1 end
+for i=0x100,ucs_out-1 do jcr_table_main[i]=0 end
+
+-- EXT: add characters to a range
+function add_char_range(b,e,ind) -- ind: external range number
+ if not ind or ind<0 or ind>216 then
+ ltjb.package_error('luatexja',
+ "invalid character range number (" .. ind .. ")",
+ {"A character range number should be in the range 1..216,",
+ "ignored."})
+ return
+ elseif b<0x80 or e>=ucs_out then
+ ltjb.package_warning('luatexja',
+ 'bad character range ([' .. b .. ',' .. e .. ']). ' ..
+ 'I take the intersection with [0x80, 0x10ffff].')
+ elseif b>e then
+ local j=b; e=b; b=j
+ end
+ for i=math.max(0x80,b),math.min(ucs_out-1,e) do
+ jcr_table_main[i]=ind
+ end
+end
+
+function char_to_range(c) -- return the (external) range number
+ if c<0 or c>0x10FFFF then
+ ltjb.package_error('luatexja',
+ 'bad character code (' .. c .. ')',
+ {'A character number must be between 0 and 0x10ffff.',
+ 'So I changed this one to zero.'})
+ c=0
+ elseif c<0x80 then return -1
+ else
+ local i = jcr_table_main[c] or 0
+ if i==0 then return 217 else return i end
+ end
+end
+
+function get_range_setting(i) -- i: internal range number
+ return floor(tex.getattribute(
+ luatexbase.attributes['ltj@kcat'..floor(i/31)])
+ /math.pow(2, i%31))%2
+end
+
+-- glyph_node p は和文文字か?
+function is_ucs_in_japanese_char(p)
+ local c = p.char
+ if c<0x80 then return false
+ else
+ local i=jcr_table_main[c]
+ return (floor(
+ has_attr(p, luatexbase.attributes['ltj@kcat'..floor(i/31)])
+ /math.pow(2, i%31))%2 ~= jcr_noncjk)
+ end
+end
+
+-- EXT
+function toggle_char_range(g, i) -- i: external range number
+ if i==0 then return
+ else
+ local kc
+ if i>0 then kc=0 else kc=1; i=-i end
+ if i>216 then i=0 end
+ local attr = luatexbase.attributes['ltj@kcat'..floor(i/31)]
+ local a = tex.getattribute(attr)
+ local k = math.pow(2, i%31)
+ tex.setattribute(g,attr,(floor(a/k/2)*2+kc)*k+a%k)
+ end
+end
+
+-- EOF \ No newline at end of file