--
--- luatexja/otf.lua
+-- ltj-adjust.lua
--
-luatexbase.provides_module({
- name = 'luatexja.adjust',
- date = '2012/09/27',
- version = '0.1',
- description = 'Advanced line adjustment for LuaTeX-ja',
-})
-module('luatexja.adjust', package.seeall)
-
luatexja.load_module('jfont'); local ltjf = luatexja.jfont
+luatexja.load_module('jfmglue'); local ltjj = luatexja.jfmglue
+luatexja.load_module('stack'); local ltjs = luatexja.stack
+luatexja.load_module('direction'); local ltjd = luatexja.direction
+luatexja.adjust = luatexja.adjust or {}
+
+local to_node = node.direct.tonode
+local to_direct = node.direct.todirect
+
+local setfield = node.direct.setfield
+local setglue = luatexja.setglue
+local getfield = node.direct.getfield
+local getlist = node.direct.getlist
+local getid = node.direct.getid
+local getfont = node.direct.getfont
+local getsubtype = node.direct.getsubtype
+
+local node_traverse_id = node.direct.traverse_id
+local node_new = node.direct.new
+local node_next = node.direct.getnext
+local node_free = node.direct.free
+local node_prev = node.direct.getprev
+local node_tail = node.direct.tail
+local has_attr = node.direct.has_attribute
+local set_attr = node.direct.set_attribute
+local insert_after = node.direct.insert_after
local id_glyph = node.id('glyph')
local id_kern = node.id('kern')
local id_hlist = node.id('hlist')
local id_glue = node.id('glue')
-local id_glue_spec = node.id('glue_spec')
-local has_attr = node.has_attribute
-local set_attr = node.set_attribute
+local id_whatsit = node.id('whatsit')
+local id_penalty = node.id('penalty')
local attr_icflag = luatexbase.attributes['ltj@icflag']
local attr_jchar_class = luatexbase.attributes['ltj@charclass']
-local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
+local lang_ja = luatexja.lang_ja
local ltjf_font_metric_table = ltjf.font_metric_table
+local ipairs, pairs = ipairs, pairs
-local PACKED = 2
-local FROM_JFM = 6
-local KANJI_SKIP = 9
-local XKANJI_SKIP = 10
-
-local priority_table = {
- FROM_JFM + 2,
- FROM_JFM + 1,
- FROM_JFM,
- FROM_JFM - 1,
- FROM_JFM - 2,
- XKANJI_SKIP,
- KANJI_SKIP
-}
-
-local PROCESSED_BEGIN_FLAG = 32
-local function get_attr_icflag(p)
- return (node.has_attribute(p, attr_icflag) or 0) % PROCESSED_BEGIN_FLAG
-end
+local PACKED = luatexja.icflag_table.PACKED
+local LINEEND = luatexja.icflag_table.LINEEND
+local FROM_JFM = luatexja.icflag_table.FROM_JFM
+local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
+local KANJI_SKIP_JFM = luatexja.icflag_table.KANJI_SKIP_JFM
+local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
+local XKANJI_SKIP_JFM = luatexja.icflag_table.XKANJI_SKIP_JFM
--- box 内で伸縮された glue の合計値を計算
-
-local function get_stretched(q, go, gs)
- local qs = q.spec
- if not qs.writable then return 0 end
- if gs == 1 then -- stretching
- if qs.stretch_order == go then return qs.stretch end
- else -- shrinking
- if qs.shrink_order == go then return qs.shrink end
+local get_attr_icflag
+do
+ local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
+ get_attr_icflag = function(p)
+ return (has_attr(p, attr_icflag) or 0) % PROCESSED_BEGIN_FLAG
end
end
-local function get_total_stretched(p)
- local go, gf, gs = p.glue_order, p.glue_set, p.glue_sign
- local new_ks, new_xs
- local res = {
- [0] = 0,
- glue_set = gf, name = (gs==1) and 'stretch' or 'shrink'
- }
- for i=1,#priority_table do res[priority_table[i]]=0 end
- if go ~= 0 then return nil end
- if gs ~= 1 and gs ~= 2 then return res end
- for q in node.traverse_id(id_glue, p.head) do
- local a, ic = get_stretched(q, go, gs), get_attr_icflag(q)
- --print(ic)
- if type(res[ic]) == 'number' then
- res[ic] = res[ic] + a
- if ic == KANJI_SKIP then
- --if not new_ks then new_ks = node_copy(q.spec); end
- --new_ks.
- q.spec = node_copy(q.spec);
- elseif ic == XKANJI_SKIP then
- q.spec = node.copy(q.spec)
- end
- else res[0] = res[0] + a
+local priority_num = { 0, 0 }
+local at2pr = { {}, {} }
+local at2pr_st, at2pr_sh = at2pr[1], at2pr[2]
+do
+ local priority_table = {{},{}}
+ luatexja.adjust.priority_table = priority_table
+ local tmp = {}
+ local function cmp(a,b) return a[1]>b[1] end -- 大きいほうが先！
+ local function make_priority_table(glue_sign)
+ for i,_ in pairs(tmp) do tmp[i]=nil end
+ if glue_sign==2 then -- shrink
+ for i=0,63 do tmp[#tmp+1] = { (i%8)-4, FROM_JFM+i } end
+ else -- stretch
+ for i=0,63 do tmp[#tmp+1] = { math.floor(i/8)-4, FROM_JFM+i } end
+ end
+ local pt = priority_table[glue_sign]
+ tmp[#tmp+1] = { pt[2]/10, XKANJI_SKIP }
+ tmp[#tmp+1] = { pt[2]/10, XKANJI_SKIP_JFM }
+ tmp[#tmp+1] = { pt[1]/10, KANJI_SKIP }
+ tmp[#tmp+1] = { pt[1]/10, KANJI_SKIP_JFM }
+ tmp[#tmp+1] = { pt[3]/10, -1 }
+ table.sort(tmp, cmp)
+ local a, m, n = at2pr[glue_sign], 10000000, 0
+ for i=1,#tmp do
+ if tmp[i][1]<m then n,m = n+1,tmp[i][1] end
+ a[tmp[i][2]] = n
end
+ local o = a[-1]
+ priority_num[glue_sign] = n
+ setmetatable(a, {__index = function () return o end })
end
- return res
+ luatexja.adjust.make_priority_table = make_priority_table
end
-local function clear_stretch(p, ic, name)
- --print('clear ' .. ic)
- for q in node.traverse_id(id_glue, p.head) do
- if get_attr_icflag(q) == ic then
- local qs = q.spec
- if qs.writable then
- qs[name..'_order'], qs[name] = 0, 0
- end
+-- box 内で伸縮された glue の合計値を計算
+
+local total_stsh = {{},{}}
+local total_st, total_sh = total_stsh[1], total_stsh[2]
+local get_total_stretched
+do
+local dimensions = node.direct.dimensions
+function get_total_stretched(p)
+-- return value: <補正値(sp)>
+ local ph = getlist(p)
+ if not ph then return 0 end
+ for i,_ in pairs(total_st) do total_st[i]=nil; total_sh[i]=nil end
+ for i=1,priority_num[1] do total_st[i]=0 end
+ for i=1,priority_num[2] do total_sh[i]=0 end
+ for i=0,4 do total_st[i*65536]=0; total_sh[i*65536]=0 end
+ for q in node_traverse_id(id_glue, ph) do
+ local a = getfield(q, 'stretch_order')
+ if a==0 then
+ local b = at2pr_st[get_attr_icflag(q)];
+ total_st[b] = total_st[b]+getfield(q, 'stretch')
end
+ total_st[a*65536] = total_st[a]+getfield(q, 'stretch')
+ local a = getfield(q, 'shrink_order')
+ if a==0 then
+ local b = at2pr_sh[get_attr_icflag(q)];
+ total_sh[b] = total_sh[b]+getfield(q, 'shrink')
+ end
+ total_sh[a*65536] = total_sh[a]+getfield(q, 'shrink')
+ end
+ for i=4,1,-1 do if total_st[i*65536]~=0 then total_st.order=i; break end; end
+ if not total_st.order then
+ total_st.order, total_st[-65536] = -1,0.1 -- dummy
end
+ for i=4,1,-1 do if total_sh[i*65536]~=0 then total_sh.order=i; break end; end
+ if not total_sh.order then
+ total_sh.order, total_sh[-65536] = -1,0.1 -- dummy
+ end
+ return getfield(p,'width') - dimensions(ph)
+end
end
-local function set_stretch(p, after, before, ic, name)
- if before > 0 then
- --print (ic, before, after)
- local ratio = after/before
- for q in node.traverse_id(id_glue, p.head) do
- if get_attr_icflag(q) == ic then
- local qs = q.spec
- if qs.writable and qs[name..'_order'] == 0 then
- qs[name] = qs[name]*ratio
- end
- end
+-- step 1: 行末に kern を挿入（句読点，中点用）
+local abs = math.abs
+local ltjd_glyph_from_packed = ltjd.glyph_from_packed
+local function aw_step1(p, total)
+ local head = getlist(p)
+ local x = node_tail(head); if not x then return total, false end
+ -- x: \rightskip
+ x = node_prev(x); if not x then return total, false end
+ local xi, xc = getid(x)
+ -- x may be penalty
+ while xi==id_penalty do
+ x = node_prev(x); if not x then return total, false end
+ xi = getid(x)
+ end
+ if (total>0 and total_st.order>0) or (total<0 and total_sh.order>0) then
+ -- 無限大のグルーで処理が行われているときは処理中止．
+ return total, false
+ end
+ if xi == id_glyph and getfield(x, 'lang')==lang_ja then
+ -- 和文文字
+ xc = x
+ elseif xi == id_hlist and get_attr_icflag(x) == PACKED then
+ -- packed JAchar
+ xc = ltjd_glyph_from_packed(x)
+ while getid(xc) == id_whatsit do xc = node_next(xc) end -- これはなんのために？
+ else
+ return total, false-- それ以外は対象外．
+ end
+ local eadt = ltjf_font_metric_table[getfont(xc)]
+ .char_type[has_attr(xc, attr_jchar_class) or 0].end_adjust
+ if not eadt then
+ return total, false
+ end
+ local eadt_ratio = {}
+ for i, v in ipairs(eadt) do
+ local t = total - v
+ if t>0 then
+ eadt_ratio[i] = {i, t/total_st[65536*total_st.order], t, v}
+ else
+ eadt_ratio[i] = {i, t/total_sh[65536*total_sh.order], t, v}
end
end
+ table.sort(eadt_ratio,
+ function (a,b)
+ for i=2,4 do
+ local at, bt = abs(a[i]), abs(b[i])
+ if at~=bt then return at<bt end
+ end
+ return a[4]<b[4]
+ end)
+ if eadt[eadt_ratio[1][1]]~=0 then
+ local kn = node_new(id_kern, 1)
+ setfield(kn, 'kern', eadt[eadt_ratio[1][1]]); set_attr(kn, attr_icflag, LINEEND)
+ insert_after(head, x, kn)
+ return eadt_ratio[1][3], true
+ else
+ return total, false
+ end
end
--- step 1: 行末に kern を挿入（句読点，中点用）
-local function aw_step1(p, res, total)
- local x = node.tail(p.head); if not x then return false end
- local x = node.prev(x) ; if not x then return false end
- -- 本当の行末の node を格納
- if x.id == id_glue and x.subtype == 15 then
- -- 段落最終行のときは，\penalty10000 \parfillskip が入るので，
- -- その前の node が本来の末尾文字となる
- x = node.prev(node.prev(x))
- end
-
- local xc
- if x.id == id_glyph and has_attr(x, attr_curjfnt) == x.font then
+-- step 1 最終行用
+local min, max = math.min, math.max
+local function aw_step1_last(p, total)
+ local head = getlist(p)
+ local x = node_tail(head); if not x then return total, false end
+ -- x: \rightskip
+ pf = node_prev(x); if not x then return total, false end
+ if getid(pf) ~= id_glue or getsubtype(pf) ~= 15 then return total, false end
+ x = node_prev(node_prev(pf)); xi = getid(x)
+ local xi, xc = getid(x)
+ if xi == id_glyph and getfield(x, 'lang')==lang_ja then
-- 和文文字
xc = x
- elseif x.id == id_hlist and get_attr_icflag(x) == PACKED then
+ elseif xi == id_hlist and get_attr_icflag(x) == PACKED then
-- packed JAchar
- xc = x.head
+ xc = ltjd_glyph_from_packed(x)
+ while getid(xc) == id_whatsit do xc = node_next(xc) end -- これはなんのために？
+ else
+ return total, false-- それ以外は対象外．
+ end
+ -- 続行条件1：無限の伸縮度を持つグルーは \parfillskipのみ
+ if total>0 and total_st.order>0 then
+ if total_st.order ~= getfield(pf, 'stretch_order') then return total, false end
+ if total_st[total_st.order*65536] ~= getfield(pf, 'stretch') then return total, false end
+ for i=total_st.order-1, 1, -1 do
+ if total_st[i*65536] ~= 0 then return total, false end
+ end
+ end
+ if total<0 and total_sh.order>0 then
+ if total_sh.order ~= getfield(pf, 'shrink_order') then return total, false end
+ if total_sh[total_sh.order*65536] ~= getfield(pf, 'shrink') then return total, false end
+ for i=total_sh.order-1, 1, -1 do
+ if total_sh[i*65536] ~= 0 then return total, false end
+ end
+ end
+ local eadt = ltjf_font_metric_table[getfont(xc)]
+ .char_type[has_attr(xc, attr_jchar_class) or 0].end_adjust
+ if not eadt then
+ return total, false
+ end
+ -- 続行条件2: min(eadt[1], 0)<= \parfillskip <= max(eadt[#eadt], 0)
+ local pfw = getfield(pf, 'width')
+ + (total>0 and getfield(pf, 'stretch') or -getfield(pf, 'shrink')) *getfield(p, 'glue_set')
+ if pfw<min(0,eadt[1]) or max(0,eadt[#eadt])<pfw then return total, false end
+ -- \parfillskip を 0 にする
+ total = total + getfield(pf, 'width')
+ total_st.order, total_sh.order = 0, 0
+ if getfield(pf, 'stretch_order')==0 then
+ local i = at2pr_st[-1]
+ total_st[0] = total_st[0] - getfield(pf, 'stretch')
+ total_st[i] = total_st[i] - getfield(pf, 'stretch')
+ total_st.order = (total_st[0]==0) and -1 or 0
+ end
+ if getfield(pf, 'shrink_order')==0 then
+ local i = at2pr_sh[-1]
+ total_sh[0] = total_sh[0] - getfield(pf, 'shrink')
+ total_sh[i] = total_sh[i] - getfield(pf, 'shrink')
+ total_sh.order = (total_sh[0]==0) and -1 or 0
+ end
+ setfield(pf, 'subtype', 1); setglue(pf)
+ local eadt_ratio = {}
+ for i, v in ipairs(eadt) do
+ local t = total - v
+ if t>0 then
+ eadt_ratio[i] = {i, t/total_st[65536*total_st.order], t, v}
+ else
+ eadt_ratio[i] = {i, t/total_sh[65536*total_sh.order], t, v}
+ end
+ end
+ table.sort(eadt_ratio,
+ function (a,b)
+ for i=2,4 do
+ local at, bt = abs(a[i]), abs(b[i])
+ if at~=bt then return at<bt end
+ end
+ return a[4]<b[4]
+ end)
+ if eadt[eadt_ratio[1][1]]~=0 then
+ local kn = node_new(id_kern, 1)
+ setfield(kn, 'kern', eadt[eadt_ratio[1][1]]); set_attr(kn, attr_icflag, LINEEND)
+ insert_after(head, x, kn)
+ return eadt_ratio[1][3], true
else
- return false-- それ以外は対象外．
- end
- local xk = ltjf_font_metric_table --
- [xc.font].size_cache.char_type[has_attr(xc, attr_jchar_class) or 0]
- ['end_' .. res.name] or 0
- --print(res.name, total, xk, unicode.utf8.char(xc.char))
-
- if xk>0 and total>=xk then
- --print("ADDED")
- total = total - xk
- local kn = node.new(id_kern)
- kn.kern = (res.name=='shrink' and -1 or 1) * xk
- set_attr(kn, attr_icflag, FROM_JFM)
- node.insert_after(p.head, x, kn)
- return true
- else return false
+ return total, false
end
end
+
-- step 2: 行中の glue を変える
-local function aw_step2(p, res, total, added_flag)
- if total == 0 then -- もともと伸縮の必要なし
- if added_flag then -- 行末に kern 追加したので，それによる補正
- local f = node.hpack(p.head, p.width, 'exactly')
- f.head, p.glue_set, p.glue_sign, p.glue_order
- = nil, f.glue_set, f.glue_sign, f.glue_order
- node.free(f); return
+local aw_step2, aw_step2_dummy
+do
+local node_hpack = node.direct.hpack
+local function repack(p)
+ local f = node_hpack(getlist(p), getfield(p, 'width'), 'exactly')
+ setfield(f, 'head', nil)
+ setfield(p, 'glue_set', getfield(f, 'glue_set'))
+ setfield(p, 'glue_order', getfield(f, 'glue_order'))
+ setfield(p, 'glue_sign', getfield(f, 'glue_sign'))
+ node_free(f)
+ return
+end
+function aw_step2_dummy(p, _, added_flag)
+ if added_flag then return repack(p) end
+end
+
+local function clear_stretch(p, ind, ap, name)
+ for q in node_traverse_id(id_glue, getlist(p)) do
+ local f = ap[get_attr_icflag(q)]
+ if f == ind then
+ setfield(q, name..'_order', 0)
+ setfield(q, name, 0)
end
- elseif total <= res[0] then -- 和文処理グルー以外で足りる
- for _,v in pairs(priority_table) do clear_stretch(p, v, res.name) end
- local f = node.hpack(p.head, p.width, 'exactly')
- f.head, p.glue_set, p.glue_sign, p.glue_order
- = nil, f.glue_set, f.glue_sign, f.glue_order
- node.free(f)
- else
- total, i = total - res[0], 1
- while i <= #priority_table do
- local v = priority_table[i]
- if total <= res[v] then
- for j = i+1,#priority_table do
- clear_stretch(p, priority_table[j], res.name)
- end
- set_stretch(p, total, res[v], v, res.name)
- i = #priority_table + 9 -- ループから抜けさせたいため
+ end
+end
+
+local function set_stretch(p, after, before, ind, ap, name)
+ if before > 0 then
+ local ratio = after/before
+ for q in node_traverse_id(id_glue, getlist(p)) do
+ local f = ap[get_attr_icflag(q)]
+ if (f==ind) and getfield(q, name..'_order')==0 then
+ setfield(q, name, getfield(q, name)*ratio)
end
- total, i= total - res[v], i+1
- end
- if i == #priority_table + 10 or added_flag then
- local f = node.hpack(p.head, p.width, 'exactly')
- f.head, p.glue_set, p.glue_sign, p.glue_order
- = nil, f.glue_set, f.glue_sign, f.glue_order
- node.free(f)
end
end
end
-
-function adjust_width(head)
- if not head then return head end
- for p in node.traverse_id(id_hlist, head) do
- local res = get_total_stretched(p)
- --print(table.serialize(res))
- if res then
- -- 調整量の合計
- local total = 0
- for i,v in pairs(res) do
- if type(i)=='number' then
- total = total + v
- end
- end; total = tex.round(total * res.glue_set)
- local added_flag = aw_step1(p, res, total)
- --print(total, res[0], res[KANJI_SKIP], res[FROM_JFM])
- aw_step2(p, res, total, added_flag)
+function aw_step2(p, total, added_flag)
+ local name = (total>0) and 'stretch' or 'shrink'
+ local id = (total>0) and 1 or 2
+ local res = total_stsh[id]
+ local pnum = priority_num[id]
+ if total==0 or res.order > 0 then
+ -- もともと伸縮の必要なしか，残りの伸縮量は無限大
+ if added_flag then return repack(p) end
+ end
+ total = abs(total)
+ for i = 1, pnum do
+ if total <= res[i] then
+ local a = at2pr[id]
+ for j = i+1,pnum do
+ clear_stretch(p, j, a, name)
+ end
+ set_stretch(p, total, res[i], i, a, name); break
end
+ total = total - res[i]
end
- return head
+ return repack(p)
+end
end
-local is_reg = false
-function enable_cb()
- if not is_reg then
- luatexbase.add_to_callback('post_linebreak_filter', adjust_width, 'Adjust width', 100)
- is_reg = true
+-- step 1': lineend=extended の場合（行分割時に考慮））
+local insert_lineend_kern
+do
+ local insert_before = node.direct.insert_before
+ local KINSOKU = luatexja.icflag_table.KINSOKU
+ function insert_lineend_kern(head, nq, np, Bp)
+ if nq.met then
+ local eadt = nq.met.char_type[nq.class].end_adjust
+ if not eadt then return end
+ if eadt[1]~=0 then
+ local x = node_new(id_kern, 1)
+ setfield(x, 'kern', eadt[1]); set_attr(x, attr_icflag, LINEEND)
+ insert_before(head, np.first, x)
+ end
+ local eadt_num = #eadt
+ for i=2,eadt_num do
+ local x = node_new(id_penalty)
+ setfield(x, 'penalty', 0); set_attr(x, attr_icflag, KINSOKU)
+ insert_before(head, np.first, x); Bp[#Bp+1] = x
+ local x = node_new(id_kern, 1)
+ setfield(x, 'kern', eadt[i]-eadt[i-1]); set_attr(x, attr_icflag, LINEEND)
+ insert_before(head, np.first, x)
+ end
+ if eadt_num>1 or eadt[1]~=0 then
+ local x = node_new(id_penalty)
+ setfield(x, 'penalty', 0); set_attr(x, attr_icflag, KINSOKU)
+ insert_before(head, np.first, x); Bp[#Bp+1] = x
+ local x = node_new(id_kern, 1)
+ setfield(x, 'kern', -eadt[eadt_num]); set_attr(x, attr_icflag, LINEEND)
+ insert_before(head, np.first, x)
+ local x = node_new(id_penalty)
+ setfield(x, 'penalty', 10000); set_attr(x, attr_icflag, KINSOKU)
+ insert_before(head, np.first, x); Bp[#Bp+1] = x
+ end
+ end
end
end
-function disable_cb()
- if is_reg then
- luatexbase.remove_from_callback('post_linebreak_filter', 'Adjust width')
- is_reg = false
+
+local adjust_width
+do
+ local myaw_atep1, myaw_step2, myaw_step1_last
+ local dummy = function(p,t,n) return t, false end
+ local ltjs_fast_get_stack_skip = ltjs.fast_get_stack_skip
+ function adjust_width(head)
+ if not head then return head end
+ local last_p
+ for p in node_traverse_id(id_hlist, to_direct(head)) do
+ if last_p then
+ myaw_step2(last_p, myaw_step1(last_p, get_total_stretched(last_p)))
+ end
+ last_p = p
+ end
+ if last_p then
+ myaw_step2(last_p, myaw_step1_last(last_p, get_total_stretched(last_p)))
+ end
+ return to_node(head)
end
+ local is_reg = false
+ function enable_cb(status_le, status_pr)
+ if (status_le>0 or status_pr>0) and (not is_reg) then
+ luatexbase.add_to_callback('post_linebreak_filter',
+ adjust_width, 'Adjust width', 100)
+ is_reg = true
+ elseif is_reg and (status_le==0 and status_pr==0) then
+ luatexbase.remove_from_callback('post_linebreak_filter', 'Adjust width')
+ is_reg = false
+ end
+ if status_le==2 then
+ if not luatexbase.in_callback('luatexja.adjust_jfmglue', 'luatexja.adjust') then
+ luatexbase.add_to_callback('luatexja.adjust_jfmglue', insert_lineend_kern, 'luatexja.adjust')
+ end
+ myaw_step1, myaw_step1_last = dummy, aw_step1_last
+ else
+ if status_le==0 then
+ myaw_step1, myaw_step1_last = dummy, dummy
+ else
+ myaw_step1, myaw_step1_last = aw_step1, aw_step1_last
+ end
+ if luatexbase.in_callback('luatexja.adjust_jfmglue', 'luatexja.adjust') then
+ luatexbase.remove_from_callback('luatexja.adjust_jfmglue', 'luatexja.adjust')
+ end
+ end
+ myaw_step2 = (status_pr>0) and aw_step2 or aw_step2_dummy
+ end
+ function disable_cb() -- only for compatibility
+ enable_cs(0)
+ end
+ luatexja.adjust.enable_cb=enable_cb
+ luatexja.adjust.disable_cb=disable_cb
+end
+
+luatexja.unary_pars.adjust = function(t)
+ return is_reg and 1 or 0
end
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