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
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
|
if not modules then modules = { } end modules ['cldf-lmt'] = {
version = 1.001,
comment = "companion to toks-scn.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local next, load, tonumber = next, load, tonumber
local gmatch, gsub, byte = string.gmatch, string.gsub, string.byte
local setmetatableindex = table.setmetatableindex
local setmetatablenewindex = table.setmetatablenewindex
local serialize = table.serialize
local concat = table.concat
local random = math.random
local randomseed = math.randomseed
local round = math.round
local abs = math.abs
local implement = interfaces.implement
local scanners = tokens.scanners
local scanword = scanners.word
local scanstring = scanners.string
local scanboolean = scanners.boolean
local scandimen = scanners.dimen
local scanfloat = scanners.float
local scaninteger = scanners.integer
local scancardinal = scanners.cardinal
local scannumber = scanners.luanumber
local scanluainteger = scanners.luainteger
local scanluacardinal = scanners.luacardinal
local scanluanumber = scanners.luanumber
local scanargument = scanners.argument
local scantoken = scanners.token
local scancsname = scanners.csname
local scankeyword = scanners.keyword
local peekchar = scanners.peekchar
local skipnext = scanners.skip
local getindex = tokens.accessors.index
local texsetdimen = tex.setdimen
local texsetcount = tex.setcount
local texgetcount = tex.getcount
local texget = tex.get
local values = tokens.values
local none_code = values.none
local integer_code = values.integer
local cardinal_code = values.cardinal
local dimension_code = values.dimension
local skip_code = values.skip
local boolean_code = values.boolean
local float_code = values.float
local global_code = tex.flagcodes.global
local context = context
-- variables --
local floats = { }
local integers = { }
local cardinals = { }
local numbers = { }
implement {
name = "luafloat",
public = true,
usage = "value",
actions = function(b)
local n = scanword()
if b == "value" then
context("%.99g",floats[n] or 0)
else
floats[n] = scanluanumber(true)
-- floats[n] = scanfloat(true)
end
end,
}
implement {
name = "luainteger",
public = true,
usage = "value",
actions = function(b)
local n = scanword()
if b == "value" then
context("%i",integers[n] or 0)
else
integers[n] = scanluainteger(true)
end
end,
}
implement {
name = "luacount",
public = true,
usage = "value",
actions = function(b)
local n = scanword()
if b == "value" then
return integer_code, integers[n] or 0
else
integers[n] = scaninteger(true)
end
end,
}
implement {
name = "luadimen",
public = true,
usage = "value",
actions = function(b)
local n = scanword()
if b == "value" then
return dimension_code, integers[n] or 0
else
integers[n] = scandimen(false,false,true)
end
end,
}
implement {
name = "luacardinal",
public = true,
usage = "value",
actions = function(b)
local n = scanword()
if b == "value" then
context("%1.0f",cardinals[n] or 0)
else
cardinals[n] = scanluacardinal(true)
end
end,
}
implement {
name = "luanumber",
public = true,
usage = "value",
actions = function(b)
local n = scanword()
if b == "value" then
context("%N",floats[n] or integers[n] or cardinals[n] or 0) -- maybe %N
else
-- floats[n] = scanfloat(true)
floats[n] = scanluanumber(true)
end
end,
}
implement {
name = "luarandom",
public = true,
usage = "value",
actions = function(b)
if b == "value" then
return integer_code, random(scanluainteger(),scanluainteger())
else
randomseed(scanluainteger(true))
end
end,
}
interfaces.floats = floats
interfaces.integers = integers
interfaces.cardinals = cardinals
interfaces.numbers = table.setmetatableindex(function(t,k)
return floats[k] or integers[k] or cardinals[k]
end)
-- arrays --
local arrays = { }
interfaces.arrays = arrays
local newindex = lua.newindex
implement {
name = "newarray",
public = true,
protected = true,
untraced = true,
arguments = { {
{ "name", "string" },
{ "nx", "integer" },
{ "ny", "integer" },
{ "type", "string" },
} },
actions = function(t)
local name = t.name
if t.name then
local nx = t.nx
local ny = t.ny
local ty = t.type or "integer"
local df = nil
if ty == "integer" or ty == "float" or ty == "dimension" then
df = 0
elseif ty == "boolean" then
df = false
else
ty = nil
end
if nx and ty ~= nil then
local data
if ny then
data = newindex(t.ny)
for i=1,ny do
data[i] = newindex(nx,df)
end
else
data = newindex(nx,df)
end
arrays[name] = data
data.nx = nx
data.ny = ny
data.type = ty
if ty == "integer" then
data.scanner = scaninteger
elseif ty == "boolean" then
data.scanner = scanboolean
elseif ty == "dimension" then
data.scanner = scandimen
elseif ty == "float" then
data.scanner = scanfloat
end
if ty == "integer" then
data.code = integer_code
elseif ty == "boolean" then
data.code = boolean_code
elseif ty == "dimension" then
data.code = dimension_code
elseif ty == "float" then
data.code = float_code
end
end
end
end,
}
implement {
name = "arrayvalue",
public = true,
usage = "value",
actions = function(b)
local name = scanstring()
if name then
local a = arrays[name]
if a then
local nx = a.nx
local ny = a.ny
local d = a
if ny then
d = d[scaninteger()]
end
local x = scaninteger()
if b == "value" then
local code = a.code
if code == float_code then
context("%.99g",d[x])
else
return code, d[x]
end
else
d[x] = a.scanner()
end
end
end
end,
}
implement {
name = "arrayequals",
public = true,
usage = "value",
actions = function(b)
local name = scanstring()
if name then
local a = arrays[name]
if a then
local nx = a.nx
local ny = a.ny
local d = a
if ny then
d = d[scaninteger()]
end
local x = scaninteger()
if b == "value" then
return boolean_code, a.scanner() == d[x]
end
end
end
end,
}
implement {
name = "arraycompare",
public = true,
usage = "value",
actions = function(b)
local name = scanstring()
if name then
local a = arrays[name]
if a then
local nx = a.nx
local ny = a.ny
local d = a
if ny then
d = d[scaninteger()]
end
local x = scaninteger()
if b == "value" then
local v = a.scanner()
local d = d[x]
if d < v then
return integer_code, 0
elseif d == v then
return integer_code, 1
else
return integer_code, 2
end
end
end
end
end,
}
implement {
name = "showarray",
public = true,
protected = true,
untraced = true,
actions = function()
local name = scanstring()
if name then
inspect(arrays[name])
end
end,
}
-- expressions --
local cache = table.setmetatableindex(function(t,k)
local code = "return function() local n = interfaces.numbers local a = interfaces.arrays return " .. k .. " end"
code = loadstring(code)
if code then
code = code()
end
t[k] = code or false
return code
end)
table.makeweak(cache)
implement {
name = "luaexpression",
public = true,
untraced = true,
actions = function()
local how = scanword()
local code = cache[scanargument()]
if code then
local result = code()
if result then
if not how then
context(tostring(code()))
elseif how == "float" then
context("%.99g",result)
elseif how == "integer" then
context("%i",round(result))
elseif how == "cardinal" then
context("%d",abs(round(result)))
elseif how == "dimen" then
context("%p",result)
elseif how == "boolean" then
context("%d",result and 1 or 0)
elseif how == "lua" then
context("%q",result)
else
context(tostring(code()))
end
end
end
end
}
local dimenfactors = number.dimenfactors
implement {
name = "nodimen",
public = true,
usage = "value",
actions = function(b)
if b == "value" then
local how = scanword()
local what = scandimen()
if how then
local factor = dimenfactors[how]
if factor then
context("%.6N%s",factor*what,how)
else
return dimension_code, what
end
else
return dimension_code, what
end
else
local t = scantoken()
if t then
local i = getindex(t)
if i then
local d = scandimen(false,false,true)
texsetdimen(i,d)
end
end
end
end,
}
-- experimental:
local grouped = { }
local slots = { }
local nofslots = 0
local nofgrouped = 0
local getinteger = tokens.getinteger
local setinteger = tokens.setinteger
local report = logs.reporter("lua table")
local ctxsprint = context.sprint
-- we could have an extra one that collects all end of grouped actions
-- so that we dispose more in one go but it doesn's pay off
local function newluatable(name,mt,dispose)
local g = { }
local t = slots[nofslots]
slots[nofslots] = false
nofslots = nofslots - 1
if not t then
nofgrouped = nofgrouped + 1
t = nofgrouped
end
if mt then
mt = getinteger(name)
if mt then
mt = grouped[mt]
if mt then
setmetatableindex(g,mt)
end
end
end
grouped[t] = g
setinteger(name,t)
-- This is the slow part. Doing this at the TeX end saved 10% runtime. I'll
-- think of something that we can set it at the Lua end.
if dispose then
ctxsprint("\\atendofgrouped{\\disposeluatable\\" .. name .. "}")
end
end
local function disposeluatable(name)
local t = getinteger(name)
local g = grouped[t]
if g then
grouped[t] = false
nofslots = nofslots + 1
slots[nofslots] = t
end
end
local function setluatable(name,kv)
local t = getinteger(name)
local g = grouped[t]
if g and kv then
for k, v in next, kv do
g[k] = v
end
end
end
local function getfromluatable(name,k)
local t = getinteger(name)
local g = grouped[t]
if g then
local v = g[k]
if v then
context(v)
else
local n = tonumber(k)
if n then
local v = g[n]
if v then
context(v)
end
end
end
end
end
local function idxfromluatable(name,k)
local t = getinteger(name)
local g = grouped[t]
if g then
local v = g[k]
if v then
context(v)
end
end
end
local function getluatable(name,k)
local t = getinteger(name)
local g = grouped[t]
if g then
return g
end
end
local function inspectluatable(name)
local t = getinteger(name)
local g = grouped[t]
if g then
report("%s", serialize(g,'[grouped slot ' .. t .. ']'))
end
end
local function showluatables()
report("nofgrouped %i, nofslots %i",nofgrouped,nofslots)
for t=1,nofgrouped do
local g = grouped[t]
if g then
report("%s", serialize(g,'[grouped slot ' .. t .. ']'))
end
end
end
implement {
name = "newluatable",
protected = true,
untraced = true,
arguments = "csname",
actions = newluatable,
}
implement {
name = "useluatable",
protected = true,
untraced = true,
arguments = { "csname", true },
actions = newluatable,
}
implement {
name = "disposeluatable",
protected = true,
untraced = true,
public = true,
arguments = "csname",
actions = disposeluatable,
}
implement {
name = "inspectluatable",
protected = true,
untraced = true,
public = true,
arguments = "csname",
actions = inspectluatable,
}
implement {
name = "showluatables",
protected = true,
untraced = true,
public = true,
actions = showluatables,
}
implement {
name = "setluatable",
protected = true,
untraced = true,
public = true,
arguments = { "csname", "argument" },
actions = function(name,data)
data = load("return {" .. data .. "}")
if data then
data = data()
if data then
setluatable(name,data)
end
end
end
}
implement {
name = "getfromluatable",
protected = false,
untraced = true,
public = true,
arguments = { "csname", "argument" },
actions = getfromluatable,
}
implement {
name = "idxfromluatable",
protected = false,
untraced = true,
public = true,
arguments = { "csname", "integer" },
actions = idxfromluatable,
}
context.luatables = {
new = function(name) newluatable(name,false,true) end,
use = function(name) useluatable(name,true, true) end,
dispose = disposeluatable,
set = setluatable,
get = getluatable,
getfrom = getfromluatable,
idxfrom = idxfromluatable,
inspect = inspectluatable,
show = showluatables,
}
-- Here's another mechanism ...
local tables = { }
local stack = setmetatableindex("table")
implement {
name = "droptablegroup",
public = true,
untraced = true,
actions = function()
local g = texget("currentgrouplevel") -- todo: tex.getgrouplevel()
local s = stack[g]
if s then
for t, data in next, s do
for k, v in next, data do
t[k] = v
end
end
stack[g] = { }
end
end,
}
local ctx_atendofgroup = context.core.cs.atendofgroup
local ctx_droptablegroup = context.core.cs.droptablegroup
local function handletable(t,b,array)
if b == "value" then
local k = array and scaninteger() or scanargument()
local v = t[k]
if v then
context(v)
end
else
local data = scanargument()
data = load("return {" .. data .. "}")
if data then
data = data()
if data then
local l = t.level
local g = texget("currentgrouplevel") -- todo: tex.getgrouplevel()
local s = stack[g]
local d = s[t]
if not d then
d = { }
s[t] = d
ctx_atendofgroup()
ctx_droptablegroup()
end
for k, v in next, data do
if not d[k] then
d[k] = t[k]
end
t[k] = v
end
-- if b == "global" then
if b and (b & 0x04) ~= 0 then -- or just band(b,0x04)
for k, v in next, stack do
local t = s[t]
if t then
for k, v in next, data do
if t[k] then
t[k] = nil
end
end
end
end
end
end
end
end
end
local function newtable(array)
local name = scancsname(true)
if not tables[name] then
local t = { }
tables[name] = t
implement {
name = name,
public = true,
usage = "value",
actions = function(b)
handletable(t,b,array)
end,
}
else
-- already defined
end
end
implement {
name = "newhashedtable",
protected = true,
untraced = true,
public = true,
actions = newtable,
}
implement {
name = "newindexedtable",
protected = true,
untraced = true,
public = true,
actions = function() newtable(true) end,
}
context.hashedtables = setmetatableindex(function(t,k) return tables[k] end)
context.indexedtables = context.hashedtables
-- I played with adding bitwise operator to the expr scanners but in the end didn't
-- keep the code ... the problem is in what symbols ... so for now a more verbose
-- and/or/xor is okay. Extending the expression scanner would add a little overhead
-- to all expressions while an logical operator would gain less that 50% so for now
-- we don't bother. Providing \ifbitwiseand makes sense for performance reasons as
-- if a bit beter than testing the bitwise and with an \ifcase.
local reporterror = logs.texerrormessage
local function youcant(cmd)
reporterror("you can't use \\%s this way, it's an integer value", cmd)
end
implement {
name = "bitwiseset",
public = true,
usage = "value",
actions = function(what)
local a = scancardinal()
if what == "value" then
return cardinal_code, a
else
youcant("bitwiseset")
end
end
}
implement {
name = "bitwiseand",
public = true,
usage = "value",
actions = function(what)
local a = scancardinal()
scankeyword("with")
local b = scancardinal()
if what == "value" then
return cardinal_code, a & b
else
youcant("bitwiseand")
end
end
}
implement {
name = "bitwiseor",
public = true,
usage = "value",
actions = function(what)
local a = scancardinal()
scankeyword("with")
local b = scancardinal()
if what == "value" then
return cardinal_code, a | b
else
youcant("bitwiseor")
end
end
}
implement {
name = "bitwisexor",
public = true,
usage = "value",
actions = function(what)
local a = scancardinal()
scankeyword("with")
local b = scancardinal()
if what == "value" then
return cardinal_code, a ~ b
else
youcant("bitwisexor")
end
end
}
implement {
name = "bitwisenot",
public = true,
usage = "value",
actions = function(what)
local a = scancardinal()
if what == "value" then
return cardinal_code, ~a & 0xFFFFFFFF
else
youcant("bitwisenot")
end
end
}
implement {
name = "bitwisenil",
public = true,
usage = "value",
actions = function(what)
local a = scancardinal()
scankeyword("with")
local b = scancardinal()
if what == "value" then
return cardinal_code, a & (~b & 0xFFFFFFFF)
else
youcant("bitwisenil")
end
end
}
implement {
name = "bitwiseshift",
public = true,
usage = "value",
actions = function(what)
local a = scancardinal()
scankeyword("by")
local b = scaninteger()
if what == "value" then
return cardinal_code, (b < 0) and (a << -b) or (a >> b)
else
youcant("bitwiseshift")
end
end
}
implement {
name = "bitwiseflip",
public = true,
usage = "value",
actions = function(what)
local t = scancsname()
local b = scaninteger()
local c = texgetcount(t)
if c then
if b > 0 then
c = c | b
elseif b < 0 then
c = c & (~(-b) & 0xFFFFFFFF)
end
if what == "value" then
return cardinal_code, c
elseif what and (what & global_code) ~= 0 then
texsetcount("global",t,c)
else
texsetcount(t,c)
end
end
end
}
implement {
name = "ifbitwiseand",
public = true,
usage = "condition",
actions = function(what)
local a = scancardinal()
local b = scancardinal()
return boolean_code, (a & b) ~= 0
end
}
implement {
name = "bitwise",
public = true,
usage = "value",
actions = function(what)
if what == "value" then
local b = 0
while true do
local c = peekchar()
if c == 48 or c == 49 then
skipnext()
b = (b << 1) + (c - 48)
if b == 0xFFFFFFFF then
break
end
else
break
end
end
return 1, b
else
local b = scancardinal()
local t = nil
local n = 0
for i=1,32 do
if (b & (0x100000000 >> i)) == 0 then
if n > 0 then
n = n + 1
t[n] = "0"
end
elseif t then
n = n + 1
t[n] = "1"
else
n = 1
t = { "1" }
end
end
context(n > 0 and table.concat(t) or "0")
end
end,
}
-- something to play with, this might move to syst-aux.lmt when we have that
local escape = function(s) return "\\" .. byte(s) end
implement {
name = "ctxluamatch",
public = true,
usage = "value",
actions = function()
local command = context[scancsname()]
local pattern = gsub(scanstring(),"\\.",escape)
local input = gsub(scanstring(),"\\.",escape)
for a, b, c, d, e, f, g, h, i in gmatch(input,pattern) do
command(a, b or "", c or "", d or "", e or "", f or "", g or "", h or "", i or "")
end
return none_code
end,
}
-- yes or no ...
do
local codes = { }
tex.codes = codes
local global_code = tex.flagcodes.global
local savelua = token.savelua
local isdefined = token.isdefined
local newsparse = sparse.new
local setsparse = sparse.set
local wipesparse = sparse.wipe
local restoresparse = sparse.restore
-- local function isglobal(n) -- maybe a general helper
-- return n and (tonumber(n) & global_code)
-- end
local registerfunction = context.functions.register
implement {
name = "codedef",
public = true,
untraced = true,
protected = true,
actions = function(what)
local name = scancsname(true)
-- if isdefined(name) then
-- wipesparse(codes[name]) -- better make a wipe helper if ever needed
-- else
local code = newsparse()
local restore = registerfunction(function() restoresparse(code) end)
implement {
name = name,
public = true,
protected = true,
usage = "value",
actions = function(what)
local n = scaninteger()
if what == "value" then
return integer_code, code[n]
else
local v = scaninteger(true)
-- if isglobal(what) then
if what and (tonumber(what) & global_code) then
setsparse(code,"global",n,v)
else
savelua(restore,true) -- only once
setsparse(code,n,v)
end
end
end,
}
codes[name] = code
-- end
end,
}
end
-- for now here:
do
local runstring = tex.runstring
local ctxcatcodes = tex.ctxcatcodes
local formatters = string.formatters
function context.runstring(fmt,str,...)
if str then
runstring(ctxcatcodes,formatters[fmt](str,...))
elseif fmt then
runstring(ctxcatcodes,fmt)
end
end
end
|