File: cpp1.shr

package info (click to toggle)
slashem 0.0.7E7F3-7
  • links: PTS, VCS
  • area: main
  • in suites: jessie, jessie-kfreebsd
  • size: 24,312 kB
  • ctags: 23,514
  • sloc: ansic: 263,201; cpp: 7,180; yacc: 2,154; sh: 739; lex: 440; awk: 97; makefile: 61; sed: 11
file content (1783 lines) | stat: -rw-r--r-- 54,679 bytes parent folder | download | duplicates (3)
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
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
# This is a shell archive.  Save it in a file, remove anything before
# this line, and then unpack it by entering "sh file".  Note, it may
# create directories; files and directories will be owned by you and
# have default permissions.
#
# This archive contains:
#
#	makefile.txt
#	readme.txt
#	cpp.mem
#	cpp.h
#	cppdef.h
#	cpp2.c
#
echo x - makefile.txt
sed 's/^X//' >makefile.txt << 'END-of-makefile.txt'
X#
X# The redefinition of strchr() and strrchr() are needed for
X# Ultrix-32, Unix 4.2 bsd (and maybe some other Unices).
X#
XBSDDEFINE = -Dstrchr=index -Dstrrchr=rindex
X#
X# On certain systems, such as Unix System III, you may need to define
X# $(LINTFLAGS) in the make command line to set system-specific lint flags.
X#
X# This Makefile assumes cpp will replace the "standard" preprocessor.
X# Delete the reference to -DLINE_PREFIX=\"\" if cpp is used stand-alone.
X# LINEFIX is a sed script filter that reinserts #line -- used for testing
X# if LINE_PREFIX is set to "".   Note that we must stand on our heads to
X# match the # and a line had better not begin with $.  By the way, what
X# we really want is
X#	LINEFIX = | sed "s/^#/#line/"
X#
XCPPDEFINE = -DLINE_PREFIX=\"\"
XLINEFIX = | sed "s/^[^ !\"%-~]/&line/"
X#
X# Define OLD_PREPROCESSOR non-zero to make a preprocessor which is
X# "as compatible as possible" with the standard Unix V7 or Ultrix
X# preprocessors.  This is needed to rebuild 4.2bsd, for example, as
X# the preprocessor is used to modify assembler code, rather than C.
X# This is not recommended for current development.  OLD_PREPROCESSOR
X# forces the following definitions:
X#   OK_DOLLAR		FALSE	$ is not allowed in variables
X#   OK_CONCAT		FALSE	# cannot concatenate tokens
X#   COMMENT_INVISIBLE	TRUE	old-style comment concatenation
X#   STRING_FORMAL	TRUE	old-style string expansion
X#
XOLDDEFINE = -DOLD_PREPROCESSOR=1
X#
X# DEFINES collects all -D arguments for cc and lint:
X# Change DEFINES = $(BSDDEFINE) $(CPPDEFINE) $(OLDDEFINE)
X# for an old-style preprocessor.
X#
X# DEFINES = $(BSDDEFINE) $(CPPDEFINE)
XDEFINES = $(CPPDEFINE)
X
XCFLAGS = -O $(DEFINES)
X
X#
X# ** compile cpp
X#
XSRCS = cpp1.c cpp2.c cpp3.c cpp4.c cpp5.c cpp6.c
XOBJS = cpp1.o cpp2.o cpp3.o cpp4.o cpp5.o cpp6.o
Xcpp: $(OBJS)
X	$(CC) $(CFLAGS) $(OBJS) -o cpp
X
X#
X# ** Test cpp by preprocessing itself, compiling the result,
X# ** repeating the process and diff'ing the result.  Note: this
X# ** is not a good test of cpp, but a simple verification.
X# ** The diff's should not report any changes.
X# ** Note that a sed script may be executed for each compile
X#
Xtest:
X	cpp cpp1.c $(LINEFIX) >old.tmp1.c
X	cpp cpp2.c $(LINEFIX) >old.tmp2.c
X	cpp cpp3.c $(LINEFIX) >old.tmp3.c
X	cpp cpp4.c $(LINEFIX) >old.tmp4.c
X	cpp cpp5.c $(LINEFIX) >old.tmp5.c
X	cpp cpp6.c $(LINEFIX) >old.tmp6.c
X	$(CC) $(CFLAGS) old.tmp[123456].c
X	a.out cpp1.c >new.tmp1.c
X	a.out cpp2.c >new.tmp2.c
X	a.out cpp3.c >new.tmp3.c
X	a.out cpp4.c >new.tmp4.c
X	a.out cpp5.c >new.tmp5.c
X	a.out cpp6.c >new.tmp6.c
X	diff old.tmp1.c new.tmp1.c
X	diff old.tmp2.c new.tmp2.c
X	diff old.tmp3.c new.tmp3.c
X	diff old.tmp4.c new.tmp4.c
X	diff old.tmp5.c new.tmp5.c
X	diff old.tmp6.c new.tmp6.c
X	rm a.out old.tmp[123456].* new.tmp[123456].*
X
X#
X# A somewhat more extensive test is provided by the "clock"
X# program (which is not distributed).  Substitute your favorite
X# macro-rich program here.
X#
Xclock:	clock.c cpp
X	cpp clock.c $(LINEFIX) >temp.cpp.c
X	cc temp.cpp.c -lcurses -ltermcap -o clock
X	rm temp.cpp.c
X
X#
X# ** Lint the code
X#
X
Xlint:	$(SRCS)
X	lint $(LINTFLAGS) $(DEFINES) $(SRCS)
X
X#
X# ** Remove unneeded files
X#
Xclean:
X	rm -f $(OBJS) cpp
X
X#
X# ** Rebuild the archive files needed to distribute cpp
X# ** Uses the Decus C archive utility.
X#
X
Xarchc:	archc.c
X	$(CC) $(CFLAGS) archc.c -o archc
X
Xarchx:	archx.c
X	$(CC) $(CFLAGS) archx.c -o archx
X
Xarchive: archc
X	archc readme.txt cpp.mem archx.c archc.c cpp.rno makefile.txt \
X		cpp*.h >cpp1.arc
X	archc cpp1.c cpp2.c cpp3.c >cpp2.arc
X	archc cpp4.c cpp5.c cpp6.c >cpp3.arc
X
X#
X# Object module dependencies
X#
X
Xcpp1.o	:	cpp1.c cpp.h cppdef.h
X
Xcpp2.o	:	cpp2.c cpp.h cppdef.h
X
Xcpp3.o	:	cpp3.c cpp.h cppdef.h
X
Xcpp4.o	:	cpp4.c cpp.h cppdef.h
X
Xcpp5.o	:	cpp5.c cpp.h cppdef.h
X
Xcpp6.o	:	cpp6.c cpp.h cppdef.h
X
X
END-of-makefile.txt
echo x - readme.txt
sed 's/^X//' >readme.txt << 'END-of-readme.txt'
X
XDecus cpp is a public-domain implementation of the C preprocessor.
XIt runs on VMS native (Vax C), VMS compatibilty mode (Decus C),
XRSX-11M, RSTS/E, P/OS, and RT11, as well as on several varieties
Xof Unix, including Ultrix.  Decus cpp attempts to implement features
Xin the Draft ANSI Standard for the C language.  It should be noted,
Xhowever, that this standard is under active development:  the current
Xdraft of the standard explicitly states that "readers are requested
Xnot to specify or claim conformance to this draft."  Thus readers
Xand users of Decus cpp should not assume that it conforms to the
Xdraft standard, or that it will conform to the actual C language
Xstandard.
X
XThese notes describe how to extract the cpp source files, configure it
Xfor your needs, and mention a few design decisions that may be of interest
Xto maintainers.
X
X			Installation
X
XBecause the primary development of cpp was not on Unix, it
Xis distributed using the Decus C archive program (quite similar
Xto the archiver published in Kernighan and Plauger's Software
XTools).  To extract the files from the net.sources distribution,
Xsave this message as cpp1.arc and the other two distribution
Xfiles as cpp2.arc and cpp3.arc.  Then, using your favorite editor,
Xlocate the archx.c program, just following the line beginning with
X"-h- archx.c" -- the format of the distribution is just:
X
X    -h- readme.txt
X      ... this file
X    -h- cpp.mem
X      ... description of cpp
X    -h- archx.c
X      ... archx.c program -- extracts archives
X    -h- archc.c
X      ... archc.c program -- creates archives
X
XCompile archx.c -- it shouldn't require any special editing.
XThen run it as follows:
X
X    archx *.arc
X
XYou do not need to remove mail headers from the saved messages.
X
XYou should then read through cppdef.h to make sure the HOST and
XTARGET (and other implementation-specific) definitions are set
Xcorrectly for your machine, editing them as needed.
X
XYou may then copy makefile.txt to Makefile, editing it as needed
Xfor your particular system.  On Unix, cpp should be compiled
Xby make without further difficulty.  On other operating systems,
Xyou should compile the six source modules, linking them together.
XNote that, on Decus C based systems, you must extend the default
Xstack allocation.  The Decus C build utility will create the
Xappropriate command file.
X
X			Support Notes
X
XThe USENET distribution kit was designed to keep all submissions around
X50,000 bytes:
X
Xcpp1.arc:
X	readme.txt	This file
X	cpp.mem		Documentation page (see below)
X	archx.c		Archive extraction program
X	archc.c		Archive construction program
X	cpp.rno		Source for cpp.mem (see below)
X	makefile.txt	Unix makefile -- copy to Makefile
X	cpp.h		Main header file (structure def's and globals)
X	cppdef.h	Configuration file (host and target definitions)
X
Xcpp2.arc:
X	cpp1.c		Mainline code, documentation master sources
X	cpp2.c		most #control processing
X	cpp3.c		filename stuff and command line parsing
Xcpp3.arc:
X	cpp4.c		#define processor
X	cpp5.c		#if <expr> processor
X	cpp6.c		Support code (symbol table and I/O routines)
X	
XCpp intentionally does not rely on the presence of a full-scale
Xmacro preprocessor, it does require the simple parameter substitution
Xpreprocessor capabilities of Unix V6 and Decus C.  If your C
Xlanguage lacks full preprocessing, you should make sure "nomacargs"
Xis #define'd in cpp.h.  (This is done automatically by the Decus C
Xcompiler.)
X
XThe documentation (manual page) for cpp is included as cpp.mem
Xand cpp.rno.  Cpp.rno is in Dec Runoff format, built by a Decus C
Xutility (getrno) from original source which is embedded in cpp1.c.
XTo my knowledge, there is no equivalent program that creates
Xthe nroff source appropriate for Unix.
X
XI would be happy to receive fixes to any problems you encounter.
XAs I do not maintain distribution kit base-levels, bare-bones
Xdiff listings without sufficient context are not very useful.
XIt is unlikely that I can find time to help you with other
Xdifficulties.
X
X			Acknowledgements
X
XI received a great deal of help from many people in debugging cpp.
XAlan Feuer and Sam Kendall used "state of the art" run-time code
Xcheckers to locate several errors.  Ed Keiser found problems when
Xcpp was used on machines with different int and pointer sizes.
XDave Conroy helped with the initial debugging, while Arthur Olsen
Xand George Rosenberg found (and solved) several problems in the
Xfirst USENET release.
X
XMartin Minow
Xdecvax!minow
X
END-of-readme.txt
echo x - cpp.mem
sed 's/^X//' >cpp.mem << 'END-of-cpp.mem'
X
X
X
X
X        1.0  C Pre-Processor
X
X
X
X                                    *******
X                                    * cpp *
X                                    *******
X
X
X
X        NAME:   cpp -- C Pre-Processor
X
X        SYNOPSIS:
X
X                cpp [-options] [infile [outfile]]
X
X        DESCRIPTION:
X
X                CPP reads a C source file, expands  macros  and  include
X                files,  and writes an input file for the C compiler.  If
X                no file arguments are given, CPP reads  from  stdin  and
X                writes  to  stdout.   If  one file argument is given, it
X                will define the input file,  while  two  file  arguments
X                define  both  input and output files.  The file name "-"
X                is a synonym for stdin or stdout as appropriate.
X
X                The following options are  supported.   Options  may  be
X                given in either case.
X
X                -C              If set, source-file comments are written
X                                to  the  output  file.   This allows the
X                                output of CPP to be used as the input to
X                                a  program,  such  as lint, that expects
X                                commands embedded in specially-formatted
X                                comments.
X
X                -Dname=value    Define the name  as  if  the  programmer
X                                wrote
X
X                                    #define name value
X
X                                at the start  of  the  first  file.   If
X                                "=value"  is  not  given, a value of "1"
X                                will be used.
X
X                                On non-unix systems, all alphabetic text
X                                will be forced to upper-case.
X
X                -E              Always return "success" to the operating
X                                system,  even  if  errors were detected.
X                                Note that some fatal errors, such  as  a
X                                missing  #include  file,  will terminate
X                                CPP, returning "failure" even if the  -E
X                                option is given.
X                                                                          Page 2
X        cpp     C Pre-Processor
X
X
X                -Idirectory     Add  this  directory  to  the  list   of
X                                directories  searched for #include "..."
X                                and #include <...> commands.  Note  that
X                                there  is  no space between the "-I" and
X                                the directory string.  More than one  -I
X                                command   is   permitted.   On  non-Unix
X                                systems   "directory"   is   forced   to
X                                upper-case.
X
X                -N              CPP  normally  predefines  some  symbols
X                                defining   the   target   computer   and
X                                operating system.  If -N  is  specified,
X                                no symbols will be predefined.  If -N -N
X                                is  specified,  the   "always   present"
X                                symbols,    __LINE__,    __FILE__,   and
X                                __DATE__ are not defined.
X
X                -Stext          CPP normally assumes that  the  size  of
X                                the  target  computer's  basic  variable
X                                types is the same as the size  of  these
X                                types  of  the host computer.  (This can
X                                be  overridden  when  CPP  is  compiled,
X                                however.)  The  -S option allows dynamic
X                                respecification of these values.  "text"
X                                is  a  string  of  numbers, separated by
X                                commas, that  specifies  correct  sizes.
X                                The sizes must be specified in the exact
X                                order:
X
X                                    char short int long float double
X
X                                If you specify the option as  "-S*text",
X                                pointers   to   these   types   will  be
X                                specified.   -S*  takes  one  additional
X                                argument  for  pointer to function (e.g.
X                                int (*)())
X
X                                For   example,    to    specify    sizes
X                                appropriate  for  a  PDP-11,  you  would
X                                write:
X
X                                       c s i l f d func
X                                     -S1,2,2,2,4,8,
X                                    -S*2,2,2,2,2,2,2
X
X                                Note that all values must be specified.
X
X                -Uname          Undefine the name as if
X
X                                    #undef name
X
X                                were given.  On non-Unix systems, "name"
X                                will be forced to upper-case.
X                                                                          Page 3
X        cpp     C Pre-Processor
X
X
X                -Xnumber        Enable debugging code.  If no  value  is
X                                given,  a value of 1 will be used.  (For
X                                maintenence of CPP only.)
X
X
X        PRE-DEFINED VARIABLES:
X
X                When CPP begins processing, the following variables will
X                have been defined (unless the -N option is specified):
X
X                Target computer (as appropriate):
X
X                    pdp11, vax, M68000 m68000 m68k
X
X                Target operating system (as appropriate):
X
X                    rsx, rt11, vms, unix
X
X                Target compiler (as appropriate):
X
X                    decus, vax11c
X
X                The implementor may add definitions to this  list.   The
X                default  definitions  match  the  definition of the host
X                computer, operating system, and C compiler.
X
X                The following are always available unless undefined  (or
X                -N was specified twice):
X
X                    __FILE__    The  input  (or  #include)  file   being
X                                compiled (as a quoted string).
X
X                    __LINE__    The line number being compiled.
X
X                    __DATE__    The date and time of  compilation  as  a
X                                Unix  ctime  quoted string (the trailing
X                                newline is removed).  Thus,
X
X                                    printf("Bug at line %s,", __LINE__);
X                                    printf(" source file %s", __FILE__);
X                                    printf(" compiled on %s", __DATE__);
X
X
X        DRAFT PROPOSED ANSI STANDARD CONSIDERATIONS:
X
X                The current  version  of  the  Draft  Proposed  Standard
X                explicitly  states  that  "readers  are requested not to
X                specify or claim conformance to this draft." Readers and
X                users  of  Decus  CPP  should  not assume that Decus CPP
X                conforms to the standard, or that it will conform to the
X                actual C Language Standard.
X
X                When CPP is itself compiled, many features of the  Draft
X                Proposed  Standard  that  are incompatible with existing
X                                                                          Page 4
X        cpp     C Pre-Processor
X
X
X                preprocessors may be  disabled.   See  the  comments  in
X                CPP's source for details.
X
X                The latest version of the Draft  Proposed  Standard  (as
X                reflected in Decus CPP) is dated November 12, 1984.
X
X                Comments are removed from the input text.   The  comment
X                is  replaced by a single space character.  The -C option
X                preserves comments, writing them to the output file.
X
X                The '$' character is considered to be a letter.  This is
X                a permitted extension.
X
X                The following new features of C are processed by CPP:
X
X                    #elif expression (#else #if)
X                    '\xNNN' (Hexadecimal constant)
X                    '\a' (Ascii BELL)
X                    '\v' (Ascii Vertical Tab)
X                    #if defined NAME 1 if defined, 0 if not
X                    #if defined (NAME) 1 if defined, 0 if not
X                    #if sizeof (basic type)
X                    unary +
X                    123U, 123LU Unsigned ints and longs.
X                    12.3L Long double numbers
X                    token#token Token concatenation
X                    #include token Expands to filename
X
X                The Draft Proposed Standard has  extended  C,  adding  a
X                constant string concatenation operator, where
X
X                    "foo" "bar"
X
X                is regarded as the single string "foobar".   (This  does
X                not  affect  CPP's  processing but does permit a limited
X                form of macro argument substitution into strings as will
X                be discussed.)
X
X                The Standard Committee plans to add token  concatenation
X                to  #define command lines.  One suggested implementation
X                is as follows:  the sequence "Token1#Token2" is  treated
X                as  if  the programmer wrote "Token1Token2".  This could
X                be used as follows:
X
X                    #line 123
X                    #define ATLINE foo#__LINE__
X
X                ATLINE would be defined as foo123.
X
X                Note that "Token2" must either have  the  format  of  an
X                identifier or be a string of digits.  Thus, the string
X
X                    #define ATLINE foo#1x3
X                                                                          Page 5
X        cpp     C Pre-Processor
X
X
X                generates two tokens:  "foo1" and "x3".
X
X                If the tokens T1 and T2 are concatenated into  T3,  this
X                implementation operates as follows:
X
X                  1. Expand T1 if it is a macro.
X                  2. Expand T2 if it is a macro.
X                  3. Join the tokens, forming T3.
X                  4. Expand T3 if it is a macro.
X
X                A macro formal parameter  will  be  substituted  into  a
X                string or character constant if it is the only component
X                of that constant:
X
X                    #define VECSIZE 123
X                    #define vprint(name, size) \
X                      printf("name" "[" "size" "] = {\n")
X                      ... vprint(vector, VECSIZE);
X
X                expands (effectively) to
X
X                      vprint("vector[123] = {\n");
X
X                Note that  this  will  be  useful  if  your  C  compiler
X                supports  the  new  string concatenation operation noted
X                above.  As implemented here, if you write
X
X                    #define string(arg) "arg"
X                      ... string("foo") ...
X
X                This implementation generates  "foo",  rather  than  the
X                strictly  correct  ""foo"" (which will probably generate
X                an error message).  This is, strictly speaking, an error
X                in CPP and may be removed from future releases.
X
X        ERROR MESSAGES:
X
X                Many.  CPP prints warning or error messages if  you  try
X                to     use     multiple-byte     character     constants
X                (non-transportable) if you #undef a symbol that was  not
X                defined,  or  if  your  program  has  potentially nested
X                comments.
X
X        AUTHOR:
X
X                Martin Minow
X
X        BUGS:
X
X                The #if expression processor uses signed integers  only.
X                I.e, #if 0xFFFFu < 0 may be TRUE.
X
END-of-cpp.mem
echo x - cpp.h
sed 's/^X//' >cpp.h << 'END-of-cpp.h'
X
X/*
X *	I n t e r n a l   D e f i n i t i o n s    f o r   C P P
X *
X * In general, definitions in this file should not be changed.
X */
X
X#ifndef	TRUE
X#define	TRUE		1
X#define	FALSE		0
X#endif
X#ifndef	EOS
X/*
X * This is predefined in Decus C
X */
X#define	EOS		'\0'		/* End of string		*/
X#endif
X#define	EOF_CHAR	0		/* Returned by get() on eof	*/
X#define NULLST		((char *) NULL)	/* Pointer to nowhere (linted)	*/
X#define	DEF_NOARGS	(-1)		/* #define foo vs #define foo()	*/
X
X/*
X * The following may need to change if the host system doesn't use ASCII.
X */
X#define	DEF_MAGIC	0x1D		/* Magic for #defines		*/
X#define	TOK_SEP		0x1E		/* Token concatenation delim.	*/
X#define COM_SEP		0x1F		/* Magic comment separator	*/
X
X/*
X * Note -- in Ascii, the following will map macro formals onto DEL + the
X * C1 control character region (decimal 128 .. (128 + PAR_MAC)) which will
X * be ok as long as PAR_MAC is less than 33).  Note that the last PAR_MAC
X * value is reserved for string substitution.
X */
X
X#define	MAC_PARM	0x7F		/* Macro formals start here	*/
X#if PAR_MAC >= 33
X	assertion fails -- PAR_MAC isn't less than 33
X#endif
X#define	LASTPARM	(PAR_MAC - 1)
X
X/*
X * Character type codes.
X */
X
X#define	INV		0		/* Invalid, must be zero	*/
X#define	OP_EOE		INV		/* End of expression		*/
X#define	DIG		1		/* Digit			*/
X#define	LET		2		/* Identifier start		*/
X#define	FIRST_BINOP	OP_ADD
X#define	OP_ADD		3
X#define	OP_SUB		4
X#define	OP_MUL		5
X#define	OP_DIV		6
X#define	OP_MOD		7
X#define	OP_ASL		8
X#define	OP_ASR		9
X#define	OP_AND		10		/* &, not &&			*/
X#define	OP_OR		11		/* |, not ||			*/
X#define	OP_XOR		12
X#define	OP_EQ		13
X#define	OP_NE		14
X#define	OP_LT		15
X#define	OP_LE		16
X#define	OP_GE		17
X#define	OP_GT		18
X#define	OP_ANA		19		/* &&				*/
X#define	OP_ORO		20		/* ||				*/
X#define	OP_QUE		21		/* ?				*/
X#define	OP_COL		22		/* :				*/
X#define	OP_CMA		23		/* , (relevant?)		*/
X#define	LAST_BINOP	OP_CMA		/* Last binary operand		*/
X/*
X * The following are unary.
X */
X#define	FIRST_UNOP	OP_PLU		/* First Unary operand		*/
X#define	OP_PLU		24		/* + (draft ANSI standard)	*/
X#define	OP_NEG		25		/* -				*/
X#define	OP_COM		26		/* ~				*/
X#define	OP_NOT		27		/* !				*/
X#define	LAST_UNOP	OP_NOT
X#define	OP_LPA		28		/* (				*/
X#define	OP_RPA		29		/* )				*/
X#define	OP_END		30		/* End of expression marker	*/
X#define	OP_MAX		(OP_END + 1)	/* Number of operators		*/
X#define	OP_FAIL		(OP_END + 1)	/* For error returns		*/
X
X/*
X * The following are for lexical scanning only.
X */
X
X#define	QUO		65		/* Both flavors of quotation	*/
X#define	DOT		66		/* . might start a number	*/
X#define	SPA		67		/* Space and tab		*/
X#define	BSH		68		/* Just a backslash		*/
X#define	END		69		/* EOF				*/
X
X/*
X * These bits are set in ifstack[]
X */
X#define	WAS_COMPILING	1		/* TRUE if compile set at entry	*/
X#define	ELSE_SEEN	2		/* TRUE when #else processed	*/
X#define	TRUE_SEEN	4		/* TRUE when #if TRUE processed	*/
X
X/*
X * Define bits for the basic types and their adjectives
X */
X
X#define	T_CHAR		  1
X#define	T_INT		  2
X#define	T_FLOAT		  4
X#define	T_DOUBLE	  8
X#define	T_SHORT		 16
X#define	T_LONG		 32
X#define	T_SIGNED	 64
X#define	T_UNSIGNED	128
X#define	T_PTR		256		/* Pointer			*/
X#define	T_FPTR		512		/* Pointer to functions		*/
X
X/*
X * The DEFBUF structure stores information about #defined
X * macros.  Note that the defbuf->repl information is always
X * in malloc storage.
X */
X
Xtypedef struct defbuf {
X	struct defbuf	*link;		/* Next define in chain	*/
X	char		*repl;		/* -> replacement	*/
X	int		hash;		/* Symbol table hash	*/
X	int		nargs;		/* For define(args)	*/
X	char		name[1];	/* #define name		*/
X} DEFBUF;
X
X/*
X * The FILEINFO structure stores information about open files
X * and macros being expanded.
X */
X
Xtypedef struct fileinfo {
X	char		*bptr;		/* Buffer pointer	*/
X	int		line;		/* for include or macro	*/
X	FILE		*fp;		/* File if non-null	*/
X	struct fileinfo	*parent;	/* Link to includer	*/
X	char		*filename;	/* File/macro name	*/
X	char		*progname;	/* From #line statement	*/
X	unsigned int	unrecur;	/* For macro recursion	*/
X	char		buffer[1];	/* current input line	*/
X} FILEINFO;
X
X/*
X * The SIZES structure is used to store the values for #if sizeof
X */
X
Xtypedef struct sizes {
X    short	bits;			/* If this bit is set,		*/
X    short	size;			/* this is the datum size value	*/
X    short	psize;			/* this is the pointer size	*/
X} SIZES;
X/*
X * nomacarg is a built-in #define on Decus C.
X */
X
X#ifdef	nomacarg
X#define	cput		output		/* cput concatenates tokens	*/
X#else
X#if COMMENT_INVISIBLE
X#define	cput(c)		{ if (c != TOK_SEP && c != COM_SEP) putchar(c); }
X#else
X#define	cput(c)		{ if (c != TOK_SEP) putchar(c); }
X#endif
X#endif
X
X#ifndef	nomacarg
X#define	streq(s1, s2)	(strcmp(s1, s2) == 0)
X#endif
X
X/*
X * Error codes.  VMS uses system definitions.
X * Decus C codes are defined in stdio.h.
X * Others are cooked to order.
X */
X
X#if HOST == SYS_VMS
X#include		<ssdef.h>
X#include		<stsdef.h>
X#define	IO_NORMAL	(SS$_NORMAL | STS$M_INHIB_MSG)
X#define	IO_ERROR	SS$_ABORT
X#endif
X/*
X * Note: IO_NORMAL and IO_ERROR are defined in the Decus C stdio.h file
X */
X#ifndef	IO_NORMAL
X#define	IO_NORMAL	0
X#endif
X#ifndef	IO_ERROR
X#define	IO_ERROR	1
X#endif
X
X/*
X * Externs
X */
X
Xextern int	line;			/* Current line number		*/
Xextern int	wrongline;		/* Force #line to cc pass 1	*/
Xextern char	type[];			/* Character classifier		*/
Xextern char	token[IDMAX + 1];	/* Current input token		*/
Xextern int	instring;		/* TRUE if scanning string	*/
Xextern int	inmacro;		/* TRUE if scanning #define	*/
Xextern int	errors;			/* Error counter		*/
Xextern int	recursion;		/* Macro depth counter		*/
Xextern char	ifstack[BLK_NEST];	/* #if information		*/
X#define	compiling ifstack[0]
Xextern char	*ifptr;			/* -> current ifstack item	*/
Xextern char	*incdir[NINCLUDE];	/* -i directories		*/
Xextern char	**incend;		/* -> active end of incdir	*/
Xextern int	cflag;			/* -C option (keep comments)	*/
Xextern int	eflag;			/* -E option (ignore errors)	*/
Xextern int	nflag;			/* -N option (no pre-defines)	*/
Xextern int	rec_recover;		/* unwind recursive macros	*/
Xextern char	*preset[];		/* Standard predefined symbols	*/
Xextern char	*magic[];		/* Magic predefined symbols	*/
Xextern FILEINFO	*infile;		/* Current input file		*/
Xextern char	work[NWORK + 1];	/* #define scratch		*/
Xextern char	*workp;			/* Free space in work		*/
X#if	DEBUG
Xextern int	debug;			/* Debug level			*/
X#endif
Xextern int	keepcomments;		/* Don't remove comments if set	*/
Xextern SIZES	size_table[];		/* For #if sizeof sizes		*/
Xextern char	*getmem();		/* Get memory or die.		*/
Xextern DEFBUF	*lookid();		/* Look for a #define'd thing	*/
Xextern DEFBUF	*defendel();		/* Symbol table enter/delete	*/
Xextern char	*savestring();		/* Stuff string in malloc mem.	*/
Xextern char	*strcpy();
Xextern char	*strcat();
Xextern char	*strrchr();
Xextern char	*strchr();
Xextern long	time();
X/* extern char	*sprintf();		/* Lint needs this		*/
END-of-cpp.h
echo x - cppdef.h
sed 's/^X//' >cppdef.h << 'END-of-cppdef.h'
X/*
X *		   S y s t e m   D e p e n d e n t
X *		D e f i n i t i o n s    f o r   C P P
X *
X * Definitions in this file may be edited to configure CPP for particular
X * host operating systems and target configurations.
X *
X * NOTE: cpp assumes it is compiled by a compiler that supports macros
X * with arguments.  If this is not the case (as for Decus C), #define
X * nomacarg -- and provide function equivalents for all macros.
X *
X * cpp also assumes the host and target implement the Ascii character set.
X * If this is not the case, you will have to do some editing here and there.
X */
X
X/*
X * This redundant definition of TRUE and FALSE works around
X * a limitation of Decus C.
X */
X#ifndef	TRUE
X#define	TRUE			1
X#define	FALSE			0
X#endif
X
X/*
X * Define the HOST operating system.  This is needed so that
X * cpp can use appropriate filename conventions.
X */
X#define	SYS_UNKNOWN		0
X#define	SYS_UNIX		1
X#define	SYS_VMS			2
X#define	SYS_RSX			3
X#define	SYS_RT11		4
X#define	SYS_LATTICE		5
X#define	SYS_ONYX		6
X#define	SYS_68000		7
X#define SYS_GCOS		8
X#define SYS_IBM			9
X#define SYS_OS			10
X#define SYS_TSS			11
X
X#ifndef	HOST
X#ifdef	unix
X#define	HOST			SYS_UNIX
X#else
X#ifdef	vms
X#define	HOST			SYS_VMS
X#else
X#ifdef	rsx
X#define	HOST			SYS_RSX
X#else
X#ifdef	rt11
X#define	HOST			SYS_RT11
X#else
X#ifdef dmert
X#define HOST			SYS_DMERT
X#else
X#ifdef gcos
X#define HOST			SYS_GCOS
X#else
X#ifdef ibm
X#define HOST			SYS_IBM
X#else
X#ifdef os
X#define HOST			SYS_OS
X#else
X#ifdef tss			
X#define HOST			SYS_TSS
X#endif
X#endif
X#endif
X#endif
X#endif
X#endif
X#endif
X#endif
X#endif
X
X#ifndef	HOST
X#define	HOST			SYS_UNKNOWN
X#endif
X
X/*
X * We assume that the target is the same as the host system
X */
X#ifndef	TARGET
X#define	TARGET			HOST
X#endif
X
X/*
X * In order to predefine machine-dependent constants,
X * several strings are defined here:
X *
X * MACHINE	defines the target cpu (by name)
X * SYSTEM	defines the target operating system
X * COMPILER	defines the target compiler
X *
X *	The above may be #defined as "" if they are not wanted.
X *	They should not be #defined as NULL.
X *
X * LINE_PREFIX	defines the # output line prefix, if not "line"
X *		This should be defined as "" if cpp is to replace
X *		the "standard" C pre-processor.
X *
X * FILE_LOCAL	marks functions which are referenced only in the
X *		file they reside.  Some C compilers allow these
X *		to be marked "static" even though they are referenced
X *		by "extern" statements elsewhere.
X *
X * OK_DOLLAR	Should be set TRUE if $ is a valid alphabetic character
X *		in identifiers (default), or zero if $ is invalid.
X *		Default is TRUE.
X *
X * OK_CONCAT	Should be set TRUE if # may be used to concatenate
X *		tokens in macros (per the Ansi Draft Standard) or
X *		FALSE for old-style # processing (needed if cpp is
X *		to process assembler source code).
X *
X * OK_DATE	Predefines the compilation date if set TRUE.
X *		Not permitted by the Nov. 12, 1984 Draft Standard.
X *
X * S_CHAR etc.	Define the sizeof the basic TARGET machine word types.
X *		By default, sizes are set to the values for the HOST
X *		computer.  If this is inappropriate, see the code in
X *		cpp3.c for details on what to change.  Also, if you
X *		have a machine where sizeof (signed int) differs from
X *		sizeof (unsigned int), you will have to edit code and
X *		tables in cpp3.c (and extend the -S option definition.)
X *
X * CPP_LIBRARY	May be defined if you have a site-specific include directory
X *		which is to be searched *before* the operating-system
X *		specific directories.
X */
X
X#if TARGET == SYS_LATTICE
X/*
X * We assume the operating system is pcdos for the IBM-PC.
X * We also assume the small model (just like the PDP-11)
X */
X#define MACHINE			"i8086"
X#define	SYSTEM			"pcdos"
X#endif
X
X#if TARGET == SYS_ONYX
X#define	MACHINE			"z8000"
X#define	SYSTEM			"unix"
X#endif
X
X#if TARGET == SYS_VMS
X#define	MACHINE			"vax"
X#define	SYSTEM			"vms"
X#define	COMPILER		"vax11c"
X#endif
X
X#if TARGET == SYS_RSX
X#define	MACHINE			"pdp11"
X#define	SYSTEM			"rsx"
X#define	COMPILER		"decus"
X#endif
X
X#if TARGET == SYS_RT11
X#define	MACHINE			"pdp11"
X#define	SYSTEM			"rt11"
X#define	COMPILER		"decus"
X#endif
X
X#if TARGET == SYS_68000
X/*
X * All three machine designators have been seen in various systems.
X * Warning -- compilers differ as to sizeof (int).  cpp3 assumes that
X * sizeof (int) == 2
X */
X#define	MACHINE			"M68000", "m68000", "m68k"
X#define	SYSTEM			"unix"
X#endif
X
X#if	TARGET == SYS_UNIX
X#define	SYSTEM			"unix"
X#ifdef	pdp11
X#define	MACHINE			"pdp11"
X#endif
X#ifdef	vax
X#define	MACHINE			"vax"
X#endif
X#ifdef u370
X#define MACHINE			"u370"
X#endif
X#ifdef interdata
X#define MACHINE			"interdata"
X#endif
X#ifdef u3b
X#define MACHINE			"u3b"
X#endif
X#ifdef u3b5	
X#define MACHINE			"u3b5"
X#endif
X#ifdef u3b2
X#define MACHINE			"u3b2"
X#endif
X#ifdef u3b20d
X#define MACHINE			"u3b20d"
X#endif
X#endif
X#endif
X
X/*
X * defaults
X */
X
X#ifndef MSG_PREFIX
X#define MSG_PREFIX		"cpp: "
X#endif
X
X#ifndef LINE_PREFIX
X#ifdef	decus
X#define	LINE_PREFIX		""
X#else
X#define LINE_PREFIX		"line"
X#endif
X#endif
X
X/*
X * OLD_PREPROCESSOR forces the definition of OK_DOLLAR, OK_CONCAT,
X * COMMENT_INVISIBLE, and STRING_FORMAL to values appropriate for
X * an old-style preprocessor.
X */
X 
X#ifndef	OLD_PREPROCESSOR
X#define	OLD_PREPROCESSOR	FALSE
X#endif
X
X#if	OLD_PREPROCESSOR
X#define	OK_DOLLAR		FALSE
X#define	OK_CONCAT		FALSE
X#define	COMMENT_INVISIBLE	TRUE
X#define	STRING_FORMAL		TRUE
X#endif
X
X/*
X * RECURSION_LIMIT may be set to -1 to disable the macro recursion test.
X */
X#ifndef	RECURSION_LIMIT
X#define	RECURSION_LIMIT	1000
X#endif
X
X/*
X * BITS_CHAR may be defined to set the number of bits per character.
X * it is needed only for multi-byte character constants.
X */
X#ifndef	BITS_CHAR
X#define	BITS_CHAR		8
X#endif
X
X/*
X * BIG_ENDIAN is set TRUE on machines (such as the IBM 360 series)
X * where 'ab' stores 'a' in the high-bits and 'b' in the low-bits.
X * It is set FALSE on machines (such as the PDP-11 and Vax-11)
X * where 'ab' stores 'a' in the low-bits and 'b' in the high-bits.
X * (Or is it the other way around?) -- Warning: BIG_ENDIAN code is untested.
X */
X#ifndef	BIG_ENDIAN
X#define	BIG_ENDIAN 		FALSE
X#endif
X
X/*
X * COMMENT_INVISIBLE may be defined to allow "old-style" comment
X * processing, whereby the comment becomes a zero-length token
X * delimiter.  This permitted tokens to be concatenated in macro
X * expansions.  This was removed from the Draft Ansi Standard.
X */
X#ifndef	COMMENT_INVISIBLE
X#define	COMMENT_INVISIBLE	FALSE
X#endif
X
X/*
X * STRING_FORMAL may be defined to allow recognition of macro parameters
X * anywhere in replacement strings.  This was removed from the Draft Ansi
X * Standard and a limited recognition capability added.
X */
X#ifndef	STRING_FORMAL
X#define	STRING_FORMAL		FALSE
X#endif
X
X/*
X * OK_DOLLAR enables use of $ as a valid "letter" in identifiers.
X * This is a permitted extension to the Ansi Standard and is required
X * for e.g., VMS, RSX-11M, etc.   It should be set FALSE if cpp is
X * used to preprocess assembler source on Unix systems.  OLD_PREPROCESSOR
X * sets OK_DOLLAR FALSE for that reason.
X */
X#ifndef	OK_DOLLAR
X#define	OK_DOLLAR		TRUE
X#endif
X
X/*
X * OK_CONCAT enables (one possible implementation of) token concatenation.
X * If cpp is used to preprocess Unix assembler source, this should be
X * set FALSE as the concatenation character, #, is used by the assembler.
X */
X#ifndef	OK_CONCAT
X#define	OK_CONCAT		TRUE
X#endif
X
X/*
X * OK_DATE may be enabled to predefine today's date as a string
X * at the start of each compilation.  This is apparently not permitted
X * by the Draft Ansi Standard.
X */
X#ifndef	OK_DATE
X#define	OK_DATE		TRUE
X#endif
X
X/*
X * Some common definitions.
X */
X
X#ifndef	DEBUG
X#define	DEBUG			FALSE
X#endif
X
X/*
X * The following definitions are used to allocate memory for
X * work buffers.  In general, they should not be modified
X * by implementors.
X *
X * PAR_MAC	The maximum number of #define parameters (31 per Standard)
X *		Note: we need another one for strings.
X * IDMAX	The longest identifier, 31 per Ansi Standard
X * NBUFF	Input buffer size
X * NWORK	Work buffer size -- the longest macro
X *		must fit here after expansion.
X * NEXP		The nesting depth of #if expressions
X * NINCLUDE	The number of directories that may be specified
X *		on a per-system basis, or by the -I option.
X * BLK_NEST	The number of nested #if's permitted.
X */
X
X#define	IDMAX			 31
X#define	PAR_MAC		   (31 + 1)
X#define	NBUFF		       1024
X#define	NWORK		       1024
X#define	NEXP			128
X#define	NINCLUDE		  7
X#define	NPARMWORK		(NWORK * 2)
X#define	BLK_NEST		32
X
X/*
X * Some special constants.  These may need to be changed if cpp
X * is ported to a weird machine.
X *
X * NOTE: if cpp is run on a non-ascii machine, ALERT and VT may
X * need to be changed.  They are used to implement the proposed
X * ANSI standard C control characters '\a' and '\v' only.
X * DEL is used to tag macro tokens to prevent #define foo foo
X * from looping.  Note that we don't try to prevent more elaborate
X * #define loops from occurring.
X */
X
X#ifndef	ALERT
X#define	ALERT			'\007'		/* '\a' is "Bell"	*/
X#endif
X
X#ifndef	VT
X#define	VT			'\013'		/* Vertical Tab CTRL/K	*/
X#endif
X
X
X#ifndef	FILE_LOCAL
X#ifdef	decus
X#define	FILE_LOCAL		static
X#else
X#ifdef	vax11c
X#define	FILE_LOCAL		static
X#else
X#define	FILE_LOCAL				/* Others are global	*/
X#endif
X#endif
X#endif
X
END-of-cppdef.h
echo x - cpp2.c
sed 's/^X//' >cpp2.c << 'END-of-cpp2.c'
X/*
X *				C P P 2 . C
X *
X *			   Process #control lines
X *
X * Edit history
X * 13-Nov-84	MM	Split from cpp1.c
X */
X
X#include	<stdio.h>
X#include	<ctype.h>
X#include	"cppdef.h"
X#include	"cpp.h"
X#if HOST == SYS_VMS
X/*
X * Include the rms stuff.  (We can't just include rms.h as it uses the
X * VaxC-specific library include syntax that Decus CPP doesn't support.
X * By including things by hand, we can CPP ourself.)
X */
X#include	<nam.h>
X#include	<fab.h>
X#include	<rab.h>
X#include	<rmsdef.h>
X#endif
X
X/*
X * Generate (by hand-inspection) a set of unique values for each control
X * operator.  Note that this is not guaranteed to work for non-Ascii
X * machines.  CPP won't compile if there are hash conflicts.
X */
X
X#define	L_assert	('a' + ('s' << 1))
X#define	L_define	('d' + ('f' << 1))
X#define	L_elif		('e' + ('i' << 1))
X#define	L_else		('e' + ('s' << 1))
X#define	L_endif		('e' + ('d' << 1))
X#define L_ident		('i' + ('e' << 1))
X#define	L_if		('i' + (EOS << 1))
X#define	L_ifdef		('i' + ('d' << 1))
X#define	L_ifndef	('i' + ('n' << 1))
X#define	L_include	('i' + ('c' << 1))
X#define	L_line		('l' + ('n' << 1))
X#define	L_nogood	(EOS + (EOS << 1))	/* To catch #i		*/
X#define	L_pragma	('p' + ('a' << 1))
X#define	L_sccs		('s' + ('c' << 1))
X#define L_undef		('u' + ('d' << 1))
X#if DEBUG
X#define	L_debug		('d' + ('b' << 1))	/* #debug		*/
X#define	L_nodebug	('n' + ('d' << 1))	/* #nodebug		*/
X#endif
X
Xint
Xcontrol(counter)
Xint		counter;	/* Pending newline counter		*/
X/*
X * Process #control lines.  Simple commands are processed inline,
X * while complex commands have their own subroutines.
X *
X * The counter is used to force out a newline before #line, and
X * #pragma commands.  This prevents these commands from ending up at
X * the end of the previous line if cpp is invoked with the -C option.
X */
X{
X	register int		c;
X	register char		*tp;
X	register int		hash;
X	char			*ep;
X
X	c = skipws();
X	if (c == '\n' || c == EOF_CHAR)
X	    return (counter + 1);
X	if (!isdigit(c))
X	    scanid(c);			/* Get #word to token[]		*/
X	else {
X	    unget();			/* Hack -- allow #123 as a	*/
X	    strcpy(token, "line");	/* synonym for #line 123	*/
X	}
X	hash = (token[1] == EOS) ? L_nogood : (token[0] + (token[2] << 1));
X	switch (hash) {
X	case L_assert:	tp = "assert";		break;
X	case L_define:	tp = "define";		break;
X	case L_elif:	tp = "elif";		break;
X	case L_else:	tp = "else";		break;
X	case L_endif:	tp = "endif";		break;
X	case L_ident:	tp = "ident";		break;
X	case L_if:	tp = "if";		break;
X	case L_ifdef:	tp = "ifdef";		break;
X	case L_ifndef:	tp = "ifndef";		break;
X	case L_include:	tp = "include";		break;
X	case L_line:	tp = "line";		break;
X	case L_pragma:	tp = "pragma";		break;
X	case L_sccs:	tp = "sccs";		break;
X	case L_undef:	tp = "undef";		break;
X#if DEBUG
X	case L_debug:	tp = "debug";		break;
X	case L_nodebug:	tp = "nodebug";		break;
X#endif
X	default:	hash = L_nogood;
X	case L_nogood:	tp = "";		break;
X	}
X	if (!streq(tp, token))
X	    hash = L_nogood;
X	/*
X	 * hash is set to a unique value corresponding to the
X	 * control keyword (or L_nogood if we think it's nonsense).
X	 */
X	if (infile->fp == NULL)
X	    cwarn("Control line \"%s\" within macro expansion", token);
X	if (!compiling) {			/* Not compiling now	*/
X	    switch (hash) {
X	    case L_if:				/* These can't turn	*/
X	    case L_ifdef:			/*  compilation on, but	*/
X	    case L_ifndef:			/*   we must nest #if's	*/
X		if (++ifptr >= &ifstack[BLK_NEST])
X		    goto if_nest_err;
X		*ifptr = 0;			/* !WAS_COMPILING	*/
X	    case L_line:			/* Many			*/
X	    /*
X	     * Are pragma's always processed?
X	     */
X	    case L_ident:
X	    case L_sccs:
X	    case L_pragma:			/*  options		*/
X	    case L_include:			/*   are uninteresting	*/
X	    case L_define:			/*    if we		*/
X	    case L_undef:			/*     aren't		*/
X	    case L_assert:			/*      compiling.	*/
Xdump_line:	skipnl();			/* Ignore rest of line	*/
X		return (counter + 1);
X	    }
X	}
X	/*
X	 * Make sure that #line and #pragma are output on a fresh line.
X	 */
X	if (counter > 0 && (hash == L_line || hash == L_pragma)) {
X	    putchar('\n');
X	    counter--;
X	}
X	switch (hash) {
X	case L_line:
X	    /*
X	     * Parse the line to update the line number and "progname"
X	     * field and line number for the next input line.
X	     * Set wrongline to force it out later.
X	     */
X	    c = skipws();
X	    workp = work;			/* Save name in work	*/
X	    while (c != '\n' && c != EOF_CHAR) {
X		save(c);
X		c = get();
X	    }
X	    unget();
X	    save(EOS);
X	    /*
X	     * Split #line argument into <line-number> and <name>
X	     * We subtract 1 as we want the number of the next line.
X	     */
X	    line = atoi(work) - 1;		/* Reset line number	*/
X	    for (tp = work; isdigit(*tp) || type[*tp] == SPA; tp++)
X		;				/* Skip over digits	*/
X	    if (*tp != EOS) {			/* Got a filename, so:	*/
X		if (*tp == '"' && (ep = strrchr(tp + 1, '"')) != NULL) {
X		    tp++;			/* Skip over left quote	*/
X		    *ep = EOS;			/* And ignore right one	*/
X		}
X		if (infile->progname != NULL)	/* Give up the old name	*/
X		    free(infile->progname);	/* if it's allocated.	*/
X	        infile->progname = savestring(tp);
X	    }
X	    wrongline = TRUE;			/* Force output later	*/
X	    break;
X
X	case L_include:
X	    doinclude();
X	    break;
X
X	case L_define:
X	    dodefine();
X	    break;
X
X	case L_undef:
X	    doundef();
X	    break;
X
X	case L_else:
X	    if (ifptr == &ifstack[0])
X		goto nest_err;
X	    else if ((*ifptr & ELSE_SEEN) != 0)
X		goto else_seen_err;
X	    *ifptr |= ELSE_SEEN;
X	    if ((*ifptr & WAS_COMPILING) != 0) {
X		if (compiling || (*ifptr & TRUE_SEEN) != 0)
X		    compiling = FALSE;
X		else {
X		    compiling = TRUE;
X		}
X	    }
X	    break;
X
X	case L_elif:
X	    if (ifptr == &ifstack[0])
X		goto nest_err;
X	    else if ((*ifptr & ELSE_SEEN) != 0) {
Xelse_seen_err:	cerror("#%s may not follow #else", token);
X		goto dump_line;
X	    }
X	    if ((*ifptr & (WAS_COMPILING | TRUE_SEEN)) != WAS_COMPILING) {
X		compiling = FALSE;		/* Done compiling stuff	*/
X		goto dump_line;			/* Skip this clause	*/
X	    }
X	    doif(L_if);
X	    break;
X
X	case L_if:
X	case L_ifdef:
X	case L_ifndef:
X	    if (++ifptr >= &ifstack[BLK_NEST])
Xif_nest_err:	cfatal("Too many nested #%s statements", token);
X	    *ifptr = WAS_COMPILING;
X	    doif(hash);
X	    break;
X
X	case L_endif:
X	    if (ifptr == &ifstack[0]) {
Xnest_err:	cerror("#%s must be in an #if", token);
X		goto dump_line;
X	    }
X	    if (!compiling && (*ifptr & WAS_COMPILING) != 0)
X		wrongline = TRUE;
X	    compiling = ((*ifptr & WAS_COMPILING) != 0);
X	    --ifptr;
X	    break;
X
X	case L_assert:
X	    if (eval() == 0)
X		cerror("Preprocessor assertion failure", NULLST);
X	    break;
X
X	case L_ident:
X	case L_sccs:
X	    goto dump_line;
X	    break;
X
X	case L_pragma:
X	    /*
X	     * #pragma is provided to pass "options" to later
X	     * passes of the compiler.  cpp doesn't have any yet.
X	     */
X	    printf("#pragma ");
X	    while ((c = get()) != '\n' && c != EOF_CHAR)
X		cput(c);
X	    unget();
X	    break;
X 
X#if DEBUG
X	case L_debug:
X	    if (debug == 0)
X		dumpdef("debug set on");
X	    debug++;
X	    break;
X
X	case L_nodebug:
X	    debug--;
X	    break;
X#endif
X
X	default:
X	    /*
X	     * Undefined #control keyword.
X	     * Note: the correct behavior may be to warn and
X	     * pass the line to a subsequent compiler pass.
X	     * This would allow #asm or similar extensions.
X	     */
X	    cerror("Illegal # command \"%s\"", token);
X	    break;
X	}
X	if (hash != L_include) {
X#if OLD_PREPROCESSOR || !VERBOSE
X	    /*
X	     * Ignore the rest of the #control line so you can write
X	     *		#if	foo
X	     *		#endif	foo
X	     */
X	    goto dump_line;			/* Take common exit	*/
X#else
X	    if (skipws() != '\n') {
X		cwarn("Unexpected text in #control line ignored", NULLST);
X		skipnl();
X	    }
X#endif
X	}
X	return (counter + 1);
X}
X
XFILE_LOCAL
Xdoif(hash)
Xint		hash;
X/*
X * Process an #if, #ifdef, or #ifndef.  The latter two are straightforward,
X * while #if needs a subroutine of its own to evaluate the expression.
X *
X * doif() is called only if compiling is TRUE.  If false, compilation
X * is always supressed, so we don't need to evaluate anything.  This
X * supresses unnecessary warnings.
X */
X{
X	register int		c;
X	register int		found;
X
X	if ((c = skipws()) == '\n' || c == EOF_CHAR) {
X	    unget();
X	    goto badif;
X	}
X	if (hash == L_if) {
X	    unget();
X	    found = (eval() != 0);	/* Evaluate expr, != 0 is  TRUE	*/
X	    hash = L_ifdef;		/* #if is now like #ifdef	*/
X	}
X	else {
X	    if (type[c] != LET)		/* Next non-blank isn't letter	*/
X		goto badif;		/* ... is an error		*/
X	    found = (lookid(c) != NULL); /* Look for it in symbol table	*/
X	}
X	if (found == (hash == L_ifdef)) {
X	    compiling = TRUE;
X	    *ifptr |= TRUE_SEEN;
X	}
X	else {
X	    compiling = FALSE;
X	}
X	return;
X
Xbadif:	cerror("#if, #ifdef, or #ifndef without an argument", NULLST);
X#if !OLD_PREPROCESSOR
X	skipnl();				/* Prevent an extra	*/
X	unget();				/* Error message	*/
X#endif
X	return;
X}
X
XFILE_LOCAL
Xdoinclude()
X/*
X * Process the #include control line.
X * There are three variations:
X *	#include "file"		search somewhere relative to the
X *				current source file, if not found,
X *				treat as #include <file>.
X *	#include <file>		Search in an implementation-dependent
X *				list of places.
X *	#include token		Expand the token, it must be one of
X *				"file" or <file>, process as such.
X *
X * Note: the November 12 draft forbids '>' in the #include <file> format.
X * This restriction is unnecessary and not implemented.
X */
X{
X	register int		c;
X	register int		delim;
X#if HOST == SYS_VMS
X	char			def_filename[NAM$C_MAXRSS + 1];
X#endif
X
X	delim = macroid(skipws());
X	if (delim != '<' && delim != '"')
X	    goto incerr;
X	if (delim == '<')
X	    delim = '>';
X	workp = work;
X	instring = TRUE;		/* Accept all characters	*/
X	while ((c = get()) != '\n' && c != delim && c != EOF_CHAR)
X	    save(c);			/* Put it away.			*/
X	skipnl(); 
X	/*
X	 * The draft is unclear if the following should be done.
X	 */
X
X	while (--workp >= work && (type[*workp] == SPA))
X	    ;				/* Trim blanks from filename	*/
X
X/*
X *	if (*workp != delim)
X *	    goto incerr; 
X */
X 	*(workp + 1) = EOS;			/* Terminate filename	*/
X	instring = FALSE;
X#if HOST == SYS_VMS
X	/*
X	 * Assume the default .h filetype.
X	 */
X	if (!vmsparse(work, ".H", def_filename)) {
X	    perror(work);		/* Oops.			*/
X	    goto incerr;
X	}
X	else if (openinclude(def_filename, (delim == '"')))
X	    return;
X#else
X	if (openinclude(work, (delim == '"')))
X	    return;
X#endif
X	/*
X	 * No sense continuing if #include file isn't there.
X	 */
X	cfatal("Cannot open include file \"%s\"", work);
X
Xincerr:	cerror("#include syntax error", NULLST);
X	return;
X}
X
XFILE_LOCAL int
Xopeninclude(filename, searchlocal)
Xchar		*filename;		/* Input file name		*/
Xint		searchlocal;		/* TRUE if #include "file"	*/
X/*
X * Actually open an include file.  This routine is only called from
X * doinclude() above, but was written as a separate subroutine for
X * programmer convenience.  It searches the list of directories
X * and actually opens the file, linking it into the list of
X * active files.  Returns TRUE if the file was opened, FALSE
X * if openinclude() fails.  No error message is printed.
X */
X{
X	register char		**incptr;
X#if HOST == SYS_VMS
X#if NWORK < (NAM$C_MAXRSS + 1)
X    << error, NWORK isn't greater than NAM$C_MAXRSS >>
X#endif
X#endif
X	char			tmpname[NWORK];	/* Filename work area	*/
X
X	if (searchlocal) {
X	    /*
X	     * Look in local directory first
X	     */
X#if HOST == SYS_UNIX
X	    /*
X	     * Try to open filename relative to the directory of the current
X	     * source file (as opposed to the current directory). (ARF, SCK).
X	     */
X	    if (filename[0] != '/'
X	     && hasdirectory(infile->filename, tmpname))
X		strcat(tmpname, filename);
X	    else {
X		strcpy(tmpname, filename);
X	    }
X#else
X	    if (!hasdirectory(filename, tmpname)
X	     && hasdirectory(infile->filename, tmpname))
X		strcat(tmpname, filename);
X	    else {
X		strcpy(tmpname, filename);
X	    }
X#endif
X	    if (openfile(tmpname))
X		return (TRUE);
X	}
X	/*
X	 * Look in any directories specified by -I command line
X	 * arguments, then in the builtin search list.
X	 */
X	for (incptr = incdir; incptr < incend; incptr++) {
X	    if (strlen(*incptr) + strlen(filename) >= (NWORK - 1))
X		cfatal("Filename work buffer overflow", NULLST);
X	    else {
X#if HOST == SYS_UNIX
X		if (filename[0] == '/')
X		    strcpy(tmpname, filename);
X		else {
X		    sprintf(tmpname, "%s/%s", *incptr, filename);
X		}
X#else
X		if (!hasdirectory(filename, tmpname))
X		    sprintf(tmpname, "%s%s", *incptr, filename);
X#endif
X		if (openfile(tmpname))
X		    return (TRUE);
X	    }
X	}
X	return (FALSE);
X}
X
XFILE_LOCAL int
Xhasdirectory(source, result)
Xchar		*source;	/* Directory to examine			*/
Xchar		*result;	/* Put directory stuff here		*/
X/*
X * If a device or directory is found in the source filename string, the
X * node/device/directory part of the string is copied to result and
X * hasdirectory returns TRUE.  Else, nothing is copied and it returns FALSE.
X */
X{
X#if HOST == SYS_UNIX
X	register char		*tp;
X
X	if ((tp = strrchr(source, '/')) == NULL)
X	    return (FALSE);
X	else {
X	    strncpy(result, source, tp - source + 1);
X	    result[tp - source + 1] = EOS;
X	    return (TRUE);
X	}
X#else
X#if HOST == SYS_VMS
X	if (vmsparse(source, NULLST, result)
X	 && result[0] != EOS)
X	    return (TRUE);
X	else {
X	    return (FALSE);
X	}
X#else
X	/*
X	 * Random DEC operating system (RSX, RT11, RSTS/E)
X	 */
X	register char		*tp;
X
X	if ((tp = strrchr(source, ']')) == NULL
X	 && (tp = strrchr(source, ':')) == NULL)
X	    return (FALSE);
X	else {
X	    strncpy(result, source, tp - source + 1);
X	    result[tp - source + 1] = EOS;
X	    return (TRUE);
X	}
X#endif
X#endif
X}
X
X#if HOST == SYS_VMS
X
X/*
X * EXP_DEV is set if a device was specified, EXP_DIR if a directory
X * is specified.  (Both set indicate a file-logical, but EXP_DEV
X * would be set by itself if you are reading, say, SYS$INPUT:)
X */
X#define DEVDIR (NAM$M_EXP_DEV | NAM$M_EXP_DIR)
X
XFILE_LOCAL int
Xvmsparse(source, defstring, result)
Xchar		*source;
Xchar		*defstring;	/* non-NULL -> default string.		*/
Xchar		*result;	/* Size is at least NAM$C_MAXRSS + 1	*/
X/*
X * Parse the source string, applying the default (properly, using
X * the system parse routine), storing it in result.
X * TRUE if it parsed, FALSE on error.
X *
X * If defstring is NULL, there are no defaults and result gets
X * (just) the node::[directory] part of the string (possibly "")
X */
X{
X	struct FAB	fab = cc$rms_fab;	/* File access block	*/
X	struct NAM	nam = cc$rms_nam;	/* File name block	*/
X	char		fullname[NAM$C_MAXRSS + 1];
X	register char	*rp;			/* Result pointer	*/
X
X	fab.fab$l_nam = &nam;			/* fab -> nam		*/
X	fab.fab$l_fna = source;			/* Source filename	*/
X	fab.fab$b_fns = strlen(source);		/* Size of source	*/
X	fab.fab$l_dna = defstring;		/* Default string	*/
X	if (defstring != NULLST)
X	    fab.fab$b_dns = strlen(defstring);	/* Size of default	*/
X	nam.nam$l_esa = fullname;		/* Expanded filename	*/
X	nam.nam$b_ess = NAM$C_MAXRSS;		/* Expanded name size	*/
X	if (sys$parse(&fab) == RMS$_NORMAL) {	/* Parse away		*/
X	    fullname[nam.nam$b_esl] = EOS;	/* Terminate string	*/
X	    result[0] = EOS;			/* Just in case		*/
X	    rp = &result[0];
X	    /*
X	     * Remove stuff added implicitly, accepting node names and
X	     * dev:[directory] strings (but not process-permanent files).
X	     */
X	    if ((nam.nam$l_fnb & NAM$M_PPF) == 0) {
X		if ((nam.nam$l_fnb & NAM$M_NODE) != 0) {
X		    strncpy(result, nam.nam$l_node, nam.nam$b_node);
X		    rp += nam.nam$b_node;
X		    *rp = EOS;
X		}
X		if ((nam.nam$l_fnb & DEVDIR) == DEVDIR) {
X		    strncpy(rp, nam.nam$l_dev, nam.nam$b_dev + nam.nam$b_dir);
X		    rp += nam.nam$b_dev + nam.nam$b_dir;
X		    *rp = EOS;
X		}
X	    }
X	    if (defstring != NULLST) {
X		strncpy(rp, nam.nam$l_name, nam.nam$b_name + nam.nam$b_type);
X		rp += nam.nam$b_name + nam.nam$b_type;
X		*rp = EOS;
X		if ((nam.nam$l_fnb & NAM$M_EXP_VER) != 0) {
X		    strncpy(rp, nam.nam$l_ver, nam.nam$b_ver);
X		    rp[nam.nam$b_ver] = EOS;
X		}
X	    }
X	    return (TRUE);
X	}
X	return (FALSE);
X}
X#endif
X
END-of-cpp2.c
exit