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
|
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- G N A T C H O P --
-- --
-- B o d y --
-- --
-- Copyright (C) 1998-2003 Ada Core Technologies, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, USA. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with Ada.Command_Line; use Ada.Command_Line;
with Ada.Text_IO; use Ada.Text_IO;
with GNAT.Command_Line; use GNAT.Command_Line;
with GNAT.OS_Lib; use GNAT.OS_Lib;
with GNAT.Heap_Sort_G;
with GNAT.Table;
with Gnatvsn;
with Hostparm;
procedure Gnatchop is
Terminate_Program : exception;
-- Used to terminate execution immediately
Config_File_Name : constant String_Access := new String'("gnat.adc");
-- The name of the file holding the GNAT configuration pragmas
Gcc : String_Access := new String'("gcc");
-- May be modified by switch --GCC=
Gcc_Set : Boolean := False;
-- True if a switch --GCC= is used
Gnat_Cmd : String_Access;
-- Command to execute the GNAT compiler
Gnat_Args : Argument_List_Access :=
new Argument_List'
(new String'("-c"),
new String'("-x"),
new String'("ada"),
new String'("-gnats"),
new String'("-gnatu"));
-- Arguments used in Gnat_Cmd call
EOF : constant Character := Character'Val (26);
-- Special character to signal end of file. Not required in input
-- files, but properly treated if present. Not generated in output
-- files except as a result of copying input file.
--------------------
-- File arguments --
--------------------
subtype File_Num is Natural;
subtype File_Offset is Natural;
type File_Entry is record
Name : String_Access;
-- Name of chop file or directory
SR_Name : String_Access;
-- Null unless the chop file starts with a source reference pragma
-- in which case this field points to the file name from this pragma.
end record;
package File is new GNAT.Table
(Table_Component_Type => File_Entry,
Table_Index_Type => File_Num,
Table_Low_Bound => 1,
Table_Initial => 100,
Table_Increment => 100);
Directory : String_Access;
-- Record name of directory, or a null string if no directory given
Compilation_Mode : Boolean := False;
Overwrite_Files : Boolean := False;
Preserve_Mode : Boolean := False;
Quiet_Mode : Boolean := False;
Source_References : Boolean := False;
Verbose_Mode : Boolean := False;
Exit_On_Error : Boolean := False;
-- Global options
Write_gnat_adc : Boolean := False;
-- Gets set true if we append to gnat.adc or create a new gnat.adc.
-- Used to inhibit complaint about no units generated.
---------------
-- Unit list --
---------------
type Line_Num is new Natural;
-- Line number (for source reference pragmas)
type Unit_Count_Type is new Integer;
subtype Unit_Num is Unit_Count_Type range 1 .. Unit_Count_Type'Last;
-- Used to refer to unit number in unit table
type SUnit_Num is new Integer;
-- Used to refer to entry in sorted units table. Note that entry
-- zero is only for use by Heapsort, and is not otherwise referenced.
type Unit_Kind is (Unit_Spec, Unit_Body, Config_Pragmas);
-- Structure to contain all necessary information for one unit.
-- Entries are also temporarily used to record config pragma sequences.
type Unit_Info is record
File_Name : String_Access;
-- File name from GNAT output line
Chop_File : File_Num;
-- File number in chop file sequence
Start_Line : Line_Num;
-- Line number from GNAT output line
Offset : File_Offset;
-- Offset name from GNAT output line
SR_Present : Boolean;
-- Set True if SR parameter present
Length : File_Offset;
-- A length of 0 means that the Unit is the last one in the file
Kind : Unit_Kind;
-- Indicates kind of unit
Sorted_Index : SUnit_Num;
-- Index of unit in sorted unit list
Bufferg : String_Access;
-- Pointer to buffer containing configuration pragmas to be
-- prepended. Null if no pragmas to be prepended.
end record;
-- The following table stores the unit offset information
package Unit is new GNAT.Table
(Table_Component_Type => Unit_Info,
Table_Index_Type => Unit_Count_Type,
Table_Low_Bound => 1,
Table_Initial => 500,
Table_Increment => 100);
-- The following table is used as a sorted index to the Unit.Table.
-- The entries in Unit.Table are not moved, instead we just shuffle
-- the entries in Sorted_Units. Note that the zeroeth entry in this
-- table is used by GNAT.Heap_Sort_G.
package Sorted_Units is new GNAT.Table
(Table_Component_Type => Unit_Num,
Table_Index_Type => SUnit_Num,
Table_Low_Bound => 0,
Table_Initial => 500,
Table_Increment => 100);
function Is_Duplicated (U : SUnit_Num) return Boolean;
-- Returns true if U is duplicated by a later unit.
-- Note that this function returns false for the last entry.
procedure Sort_Units;
-- Sort units and set up sorted unit table.
----------------------
-- File_Descriptors --
----------------------
function dup (handle : File_Descriptor) return File_Descriptor;
function dup2 (from, to : File_Descriptor) return File_Descriptor;
-- File descriptor based functions needed for redirecting stdin/stdout
pragma Import (C, dup, "dup");
pragma Import (C, dup2, "dup2");
---------------------
-- Local variables --
---------------------
Warning_Count : Natural := 0;
-- Count of warnings issued so far
-----------------------
-- Local subprograms --
-----------------------
procedure Error_Msg (Message : String; Warning : Boolean := False);
-- Produce an error message on standard error output
procedure File_Time_Stamp (Name : C_File_Name; Time : OS_Time);
-- Given the name of a file or directory, Name, set the
-- time stamp. This function must be used for an unopened file.
function Files_Exist return Boolean;
-- Check Unit.Table for possible file names that already exist
-- in the file system. Returns true if files exist, False otherwise
function Get_Maximum_File_Name_Length return Integer;
pragma Import (C, Get_Maximum_File_Name_Length,
"__gnat_get_maximum_file_name_length");
-- Function to get maximum file name length for system
Maximum_File_Name_Length : constant Integer := Get_Maximum_File_Name_Length;
Maximum_File_Name_Length_String : constant String :=
Integer'Image
(Maximum_File_Name_Length);
function Locate_Executable
(Program_Name : String;
Look_For_Prefix : Boolean := True)
return String_Access;
-- Locate executable for given program name. This takes into account
-- the target-prefix of the current command, if Look_For_Prefix is True.
subtype EOL_Length is Natural range 0 .. 2;
-- Possible lengths of end of line sequence
type EOL_String (Len : EOL_Length := 0) is record
Str : String (1 .. Len);
end record;
function Get_EOL
(Source : access String;
Start : Positive)
return EOL_String;
-- Return the line terminator used in the passed string
procedure Parse_EOL (Source : access String; Ptr : in out Positive);
-- On return Source (Ptr) is the first character of the next line
-- or EOF. Source.all must be terminated by EOF.
function Parse_File (Num : File_Num) return Boolean;
-- Calls the GNAT compiler to parse the given source file and parses the
-- output using Parse_Offset_Info. Returns True if parse operation
-- completes, False if some system error (e.g. failure to read the
-- offset information) occurs.
procedure Parse_Offset_Info (Chop_File : File_Num; Source : access String);
-- Parses the output of the compiler indicating the offsets
-- and names of the compilation units in Chop_File.
procedure Parse_Token
(Source : access String;
Ptr : in out Positive;
Token_Ptr : out Positive);
-- Skips any separators and stores the start of the token in Token_Ptr.
-- Then stores the position of the next separator in Ptr.
-- On return Source (Token_Ptr .. Ptr - 1) is the token.
procedure Read_File
(FD : File_Descriptor;
Contents : out String_Access;
Success : out Boolean);
-- Reads file associated with FS into the newly allocated
-- string Contents.
-- [VMS] Success is true iff the number of bytes read is less than or
-- equal to the file size.
-- [Other] Success is true iff the number of bytes read is equal to
-- the file size.
function Report_Duplicate_Units return Boolean;
-- Output messages about duplicate units in the input files in Unit.Table
-- Returns True if any duplicates found, Fals if no duplicates found.
function Scan_Arguments return Boolean;
-- Scan command line options and set global variables accordingly.
-- Also scan out file and directory arguments. Returns True if scan
-- was successful, and False if the scan fails for any reason.
procedure Usage;
-- Output message on standard output describing syntax of gnatchop command
procedure Warning_Msg (Message : String);
-- Output a warning message on standard error and update warning count
function Write_Chopped_Files (Input : File_Num) return Boolean;
-- Write all units that result from chopping the Input file
procedure Write_Config_File (Input : File_Num; U : Unit_Num);
-- Call to write configuration pragmas (append them to gnat.adc)
-- Input is the file number for the chop file and U identifies the
-- unit entry for the configuration pragmas.
function Get_Config_Pragmas
(Input : File_Num;
U : Unit_Num)
return String_Access;
-- Call to read configuration pragmas from given unit entry, and
-- return a buffer containing the pragmas to be appended to
-- following units. Input is the file number for the chop file and
-- U identifies the unit entry for the configuration pragmas.
procedure Write_Source_Reference_Pragma
(Info : Unit_Info;
Line : Line_Num;
FD : File_Descriptor;
EOL : EOL_String;
Success : in out Boolean);
-- If Success is True on entry, writes a source reference pragma using
-- the chop file from Info, and the given line number. On return Success
-- indicates whether the write succeeded. If Success is False on entry,
-- or if the global flag Source_References is False, then the call to
-- Write_Source_Reference_Pragma has no effect. EOL indicates the end
-- of line sequence to be written at the end of the pragma.
procedure Write_Unit
(Source : access String;
Num : Unit_Num;
TS_Time : OS_Time;
Success : out Boolean);
-- Write one compilation unit of the source to file
---------------
-- Error_Msg --
---------------
procedure Error_Msg (Message : String; Warning : Boolean := False) is
begin
Put_Line (Standard_Error, Message);
if not Warning then
Set_Exit_Status (Failure);
end if;
if Exit_On_Error then
raise Terminate_Program;
end if;
end Error_Msg;
---------------------
-- File_Time_Stamp --
---------------------
procedure File_Time_Stamp (Name : C_File_Name; Time : OS_Time) is
procedure Set_File_Time (Name : C_File_Name; Time : OS_Time);
pragma Import (C, Set_File_Time, "__gnat_set_file_time_name");
begin
Set_File_Time (Name, Time);
end File_Time_Stamp;
-----------------
-- Files_Exist --
-----------------
function Files_Exist return Boolean is
Exists : Boolean := False;
begin
for SNum in 1 .. SUnit_Num (Unit.Last) loop
-- Only check and report for the last instance of duplicated files
if not Is_Duplicated (SNum) then
declare
Info : Unit_Info := Unit.Table (Sorted_Units.Table (SNum));
begin
if Is_Writable_File (Info.File_Name.all) then
if Hostparm.OpenVMS then
Error_Msg
(Info.File_Name.all
& " already exists, use /OVERWRITE to overwrite");
else
Error_Msg (Info.File_Name.all
& " already exists, use -w to overwrite");
end if;
Exists := True;
end if;
end;
end if;
end loop;
return Exists;
end Files_Exist;
------------------------
-- Get_Config_Pragmas --
------------------------
function Get_Config_Pragmas
(Input : File_Num;
U : Unit_Num)
return String_Access
is
Info : Unit_Info renames Unit.Table (U);
FD : File_Descriptor;
Name : aliased constant String :=
File.Table (Input).Name.all & ASCII.Nul;
Length : File_Offset;
Buffer : String_Access;
Success : Boolean;
Result : String_Access;
begin
FD := Open_Read (Name'Address, Binary);
if FD = Invalid_FD then
Error_Msg ("cannot open " & File.Table (Input).Name.all);
return null;
end if;
Read_File (FD, Buffer, Success);
-- A length of 0 indicates that the rest of the file belongs to
-- this unit. The actual length must be calculated now. Take into
-- account that the last character (EOF) must not be written.
if Info.Length = 0 then
Length := Buffer'Last - (Buffer'First + Info.Offset);
else
Length := Info.Length;
end if;
Result := new String'(Buffer (1 .. Length));
Close (FD);
return Result;
end Get_Config_Pragmas;
-------------
-- Get_EOL --
-------------
function Get_EOL
(Source : access String;
Start : Positive)
return EOL_String
is
Ptr : Positive := Start;
First : Positive;
Last : Natural;
begin
-- Skip to end of line
while Source (Ptr) /= ASCII.CR and then
Source (Ptr) /= ASCII.LF and then
Source (Ptr) /= EOF
loop
Ptr := Ptr + 1;
end loop;
Last := Ptr;
if Source (Ptr) /= EOF then
-- Found CR or LF
First := Ptr;
else
First := Ptr + 1;
end if;
-- Recognize CR/LF or LF/CR combination
if (Source (Ptr + 1) = ASCII.CR or Source (Ptr + 1) = ASCII.LF)
and then Source (Ptr) /= Source (Ptr + 1)
then
Last := First + 1;
end if;
return (Len => Last + 1 - First, Str => Source (First .. Last));
end Get_EOL;
-------------------
-- Is_Duplicated --
-------------------
function Is_Duplicated (U : SUnit_Num) return Boolean is
begin
return U < SUnit_Num (Unit.Last)
and then
Unit.Table (Sorted_Units.Table (U)).File_Name.all =
Unit.Table (Sorted_Units.Table (U + 1)).File_Name.all;
end Is_Duplicated;
-----------------------
-- Locate_Executable --
-----------------------
function Locate_Executable
(Program_Name : String;
Look_For_Prefix : Boolean := True)
return String_Access
is
Current_Command : constant String := Command_Name;
End_Of_Prefix : Natural := Current_Command'First - 1;
Start_Of_Prefix : Positive := Current_Command'First;
Result : String_Access;
begin
if Look_For_Prefix then
-- Find Start_Of_Prefix
for J in reverse Current_Command'Range loop
if Current_Command (J) = '/' or
Current_Command (J) = Directory_Separator or
Current_Command (J) = ':'
then
Start_Of_Prefix := J + 1;
exit;
end if;
end loop;
-- Find End_Of_Prefix
End_Of_Prefix := Start_Of_Prefix - 1;
for J in reverse Start_Of_Prefix .. Current_Command'Last loop
if Current_Command (J) = '-' then
End_Of_Prefix := J;
exit;
end if;
end loop;
end if;
declare
Command : constant String :=
Current_Command (Start_Of_Prefix .. End_Of_Prefix) &
Program_Name;
begin
Result := Locate_Exec_On_Path (Command);
if Result = null then
Error_Msg
(Command & ": installation problem, executable not found");
end if;
end;
return Result;
end Locate_Executable;
---------------
-- Parse_EOL --
---------------
procedure Parse_EOL (Source : access String; Ptr : in out Positive) is
begin
-- Skip to end of line
while Source (Ptr) /= ASCII.CR and then Source (Ptr) /= ASCII.LF
and then Source (Ptr) /= EOF
loop
Ptr := Ptr + 1;
end loop;
if Source (Ptr) /= EOF then
Ptr := Ptr + 1; -- skip CR or LF
end if;
-- Skip past CR/LF or LF/CR combination
if (Source (Ptr) = ASCII.CR or Source (Ptr) = ASCII.LF)
and then Source (Ptr) /= Source (Ptr - 1)
then
Ptr := Ptr + 1;
end if;
end Parse_EOL;
----------------
-- Parse_File --
----------------
function Parse_File (Num : File_Num) return Boolean is
Chop_Name : constant String_Access := File.Table (Num).Name;
Offset_Name : Temp_File_Name;
Offset_FD : File_Descriptor;
Save_Stdout : File_Descriptor := dup (Standout);
Buffer : String_Access;
Success : Boolean;
Failure : exception;
begin
-- Display copy of GNAT command if verbose mode
if Verbose_Mode then
Put (Gnat_Cmd.all);
for J in 1 .. Gnat_Args'Length loop
Put (' ');
Put (Gnat_Args (J).all);
end loop;
Put (' ');
Put_Line (Chop_Name.all);
end if;
-- Create temporary file
Create_Temp_File (Offset_FD, Offset_Name);
if Offset_FD = Invalid_FD then
Error_Msg ("gnatchop: cannot create temporary file");
Close (Save_Stdout);
return False;
end if;
-- Redirect Stdout to this temporary file in the Unix way
if dup2 (Offset_FD, Standout) = Invalid_FD then
Error_Msg ("gnatchop: cannot redirect stdout to temporary file");
Close (Save_Stdout);
Close (Offset_FD);
return False;
end if;
-- Call Gnat on the source filename argument with special options
-- to generate offset information. If this special compilation completes
-- successfully then we can do the actual gnatchop operation.
Spawn (Gnat_Cmd.all, Gnat_Args.all & Chop_Name, Success);
if not Success then
Error_Msg (Chop_Name.all & ": parse errors detected");
Error_Msg (Chop_Name.all & ": chop may not be successful");
end if;
-- Restore stdout
if dup2 (Save_Stdout, Standout) = Invalid_FD then
Error_Msg ("gnatchop: cannot restore stdout");
end if;
-- Reopen the file to start reading from the beginning
Close (Offset_FD);
Close (Save_Stdout);
Offset_FD := Open_Read (Offset_Name'Address, Binary);
if Offset_FD = Invalid_FD then
Error_Msg ("gnatchop: cannot access offset info");
raise Failure;
end if;
Read_File (Offset_FD, Buffer, Success);
if not Success then
Error_Msg ("gnatchop: error reading offset info");
Close (Offset_FD);
raise Failure;
else
Parse_Offset_Info (Num, Buffer);
end if;
-- Close and delete temporary file
Close (Offset_FD);
Delete_File (Offset_Name'Address, Success);
return Success;
exception
when Failure | Terminate_Program =>
Close (Offset_FD);
Delete_File (Offset_Name'Address, Success);
return False;
end Parse_File;
-----------------------
-- Parse_Offset_Info --
-----------------------
procedure Parse_Offset_Info
(Chop_File : File_Num;
Source : access String)
is
First_Unit : Unit_Num := Unit.Last + 1;
Bufferg : String_Access := null;
Parse_Ptr : File_Offset := Source'First;
Token_Ptr : File_Offset;
Info : Unit_Info;
function Match (Literal : String) return Boolean;
-- Checks if given string appears at the current Token_Ptr location
-- and if so, bumps Parse_Ptr past the token and returns True. If
-- the string is not present, sets Parse_Ptr to Token_Ptr and
-- returns False.
-----------
-- Match --
-----------
function Match (Literal : String) return Boolean is
begin
Parse_Token (Source, Parse_Ptr, Token_Ptr);
if Source'Last + 1 - Token_Ptr < Literal'Length
or else
Source (Token_Ptr .. Token_Ptr + Literal'Length - 1) /= Literal
then
Parse_Ptr := Token_Ptr;
return False;
end if;
Parse_Ptr := Token_Ptr + Literal'Length;
return True;
end Match;
-- Start of processing for Parse_Offset_Info
begin
loop
-- Set default values, should get changed for all
-- units/pragmas except for the last
Info.Chop_File := Chop_File;
Info.Length := 0;
-- Parse the current line of offset information into Info
-- and exit the loop if there are any errors or on EOF.
-- First case, parse a line in the following format:
-- Unit x (spec) line 7, file offset 142, [SR, ]file name x.ads
-- Note that the unit name can be an operator name in quotes.
-- This is of course illegal, but both GNAT and gnatchop handle
-- the case so that this error does not intefere with chopping.
-- The SR ir present indicates that a source reference pragma
-- was processed as part of this unit (and that therefore no
-- Source_Reference pragma should be generated.
if Match ("Unit") then
Parse_Token (Source, Parse_Ptr, Token_Ptr);
if Match ("(body)") then
Info.Kind := Unit_Body;
elsif Match ("(spec)") then
Info.Kind := Unit_Spec;
else
exit;
end if;
exit when not Match ("line");
Parse_Token (Source, Parse_Ptr, Token_Ptr);
Info.Start_Line := Line_Num'Value
(Source (Token_Ptr .. Parse_Ptr - 1));
exit when not Match ("file offset");
Parse_Token (Source, Parse_Ptr, Token_Ptr);
Info.Offset := File_Offset'Value
(Source (Token_Ptr .. Parse_Ptr - 1));
Info.SR_Present := Match ("SR, ");
exit when not Match ("file name");
Parse_Token (Source, Parse_Ptr, Token_Ptr);
Info.File_Name := new String'
(Directory.all & Source (Token_Ptr .. Parse_Ptr - 1));
Parse_EOL (Source, Parse_Ptr);
-- Second case, parse a line of the following form
-- Configuration pragmas at line 10, file offset 223
elsif Match ("Configuration pragmas at") then
Info.Kind := Config_Pragmas;
Info.File_Name := Config_File_Name;
exit when not Match ("line");
Parse_Token (Source, Parse_Ptr, Token_Ptr);
Info.Start_Line := Line_Num'Value
(Source (Token_Ptr .. Parse_Ptr - 1));
exit when not Match ("file offset");
Parse_Token (Source, Parse_Ptr, Token_Ptr);
Info.Offset := File_Offset'Value
(Source (Token_Ptr .. Parse_Ptr - 1));
Parse_EOL (Source, Parse_Ptr);
-- Third case, parse a line of the following form
-- Source_Reference pragma for file "filename"
-- This appears at the start of the file only, and indicates
-- the name to be used on any generated Source_Reference pragmas.
elsif Match ("Source_Reference pragma for file ") then
Parse_Token (Source, Parse_Ptr, Token_Ptr);
File.Table (Chop_File).SR_Name :=
new String'(Source (Token_Ptr + 1 .. Parse_Ptr - 2));
Parse_EOL (Source, Parse_Ptr);
goto Continue;
-- Unrecognized keyword or end of file
else
exit;
end if;
-- Store the data in the Info record in the Unit.Table
Unit.Increment_Last;
Unit.Table (Unit.Last) := Info;
-- If this is not the first unit from the file, calculate
-- the length of the previous unit as difference of the offsets
if Unit.Last > First_Unit then
Unit.Table (Unit.Last - 1).Length :=
Info.Offset - Unit.Table (Unit.Last - 1).Offset;
end if;
-- If not in compilation mode combine current unit with any
-- preceding configuration pragmas.
if not Compilation_Mode
and then Unit.Last > First_Unit
and then Unit.Table (Unit.Last - 1).Kind = Config_Pragmas
then
Info.Start_Line := Unit.Table (Unit.Last - 1).Start_Line;
Info.Offset := Unit.Table (Unit.Last - 1).Offset;
-- Delete the configuration pragma entry
Unit.Table (Unit.Last - 1) := Info;
Unit.Decrement_Last;
end if;
-- If in compilation mode, and previous entry is the initial
-- entry for the file and is for configuration pragmas, then
-- they are to be appended to every unit in the file.
if Compilation_Mode
and then Unit.Last = First_Unit + 1
and then Unit.Table (First_Unit).Kind = Config_Pragmas
then
Bufferg :=
Get_Config_Pragmas
(Unit.Table (Unit.Last - 1).Chop_File, First_Unit);
Unit.Table (Unit.Last - 1) := Info;
Unit.Decrement_Last;
end if;
Unit.Table (Unit.Last).Bufferg := Bufferg;
-- If in compilation mode, and this is not the first item,
-- combine configuration pragmas with previous unit, which
-- will cause an error message to be generated when the unit
-- is compiled.
if Compilation_Mode
and then Unit.Last > First_Unit
and then Unit.Table (Unit.Last).Kind = Config_Pragmas
then
Unit.Decrement_Last;
end if;
<<Continue>>
null;
end loop;
-- Find out if the loop was exited prematurely because of
-- an error or if the EOF marker was found.
if Source (Parse_Ptr) /= EOF then
Error_Msg
(File.Table (Chop_File).Name.all & ": error parsing offset info");
return;
end if;
-- Handle case of a chop file consisting only of config pragmas
if Unit.Last = First_Unit
and then Unit.Table (Unit.Last).Kind = Config_Pragmas
then
-- In compilation mode, we append such a file to gnat.adc
if Compilation_Mode then
Write_Config_File (Unit.Table (Unit.Last).Chop_File, First_Unit);
Unit.Decrement_Last;
-- In default (non-compilation) mode, this is invalid
else
Error_Msg
(File.Table (Chop_File).Name.all &
": no units found (only pragmas)");
Unit.Decrement_Last;
end if;
end if;
-- Handle case of a chop file ending with config pragmas. This can
-- happen only in default non-compilation mode, since in compilation
-- mode such configuration pragmas are part of the preceding unit.
-- We simply concatenate such pragmas to the previous file which
-- will cause a compilation error, which is appropriate.
if Unit.Last > First_Unit
and then Unit.Table (Unit.Last).Kind = Config_Pragmas
then
Unit.Decrement_Last;
end if;
end Parse_Offset_Info;
-----------------
-- Parse_Token --
-----------------
procedure Parse_Token
(Source : access String;
Ptr : in out Positive;
Token_Ptr : out Positive)
is
In_Quotes : Boolean := False;
begin
-- Skip separators
while Source (Ptr) = ' ' or Source (Ptr) = ',' loop
Ptr := Ptr + 1;
end loop;
Token_Ptr := Ptr;
-- Find end-of-token
while (In_Quotes or else not (Source (Ptr) = ' ' or Source (Ptr) = ','))
and then Source (Ptr) >= ' '
loop
if Source (Ptr) = '"' then
In_Quotes := not In_Quotes;
end if;
Ptr := Ptr + 1;
end loop;
end Parse_Token;
---------------
-- Read_File --
---------------
procedure Read_File
(FD : File_Descriptor;
Contents : out String_Access;
Success : out Boolean)
is
Length : constant File_Offset := File_Offset (File_Length (FD));
-- Include room for EOF char
Buffer : constant String_Access := new String (1 .. Length + 1);
This_Read : Integer;
Read_Ptr : File_Offset := 1;
begin
loop
This_Read := Read (FD,
A => Buffer (Read_Ptr)'Address,
N => Length + 1 - Read_Ptr);
Read_Ptr := Read_Ptr + Integer'Max (This_Read, 0);
exit when This_Read <= 0;
end loop;
Buffer (Read_Ptr) := EOF;
Contents := new String (1 .. Read_Ptr);
Contents.all := Buffer (1 .. Read_Ptr);
-- Things aren't simple on VMS due to the plethora of file types
-- and organizations. It seems clear that there shouldn't be more
-- bytes read than are contained in the file though.
if Hostparm.OpenVMS then
Success := Read_Ptr <= Length + 1;
else
Success := Read_Ptr = Length + 1;
end if;
end Read_File;
----------------------------
-- Report_Duplicate_Units --
----------------------------
function Report_Duplicate_Units return Boolean is
US : SUnit_Num;
U : Unit_Num;
Duplicates : Boolean := False;
begin
US := 1;
while US < SUnit_Num (Unit.Last) loop
U := Sorted_Units.Table (US);
if Is_Duplicated (US) then
Duplicates := True;
-- Move to last two versions of duplicated file to make it clearer
-- to understand which file is retained in case of overwriting.
while US + 1 < SUnit_Num (Unit.Last) loop
exit when not Is_Duplicated (US + 1);
US := US + 1;
end loop;
U := Sorted_Units.Table (US);
if Overwrite_Files then
Warning_Msg (Unit.Table (U).File_Name.all
& " is duplicated (all but last will be skipped)");
elsif Unit.Table (U).Chop_File =
Unit.Table (Sorted_Units.Table (US + 1)).Chop_File
then
Error_Msg (Unit.Table (U).File_Name.all
& " is duplicated in "
& File.Table (Unit.Table (U).Chop_File).Name.all);
else
Error_Msg (Unit.Table (U).File_Name.all
& " in "
& File.Table (Unit.Table (U).Chop_File).Name.all
& " is duplicated in "
& File.Table
(Unit.Table
(Sorted_Units.Table (US + 1)).Chop_File).Name.all);
end if;
end if;
US := US + 1;
end loop;
if Duplicates and not Overwrite_Files then
if Hostparm.OpenVMS then
Put_Line
("use /OVERWRITE to overwrite files and keep last version");
else
Put_Line ("use -w to overwrite files and keep last version");
end if;
end if;
return Duplicates;
end Report_Duplicate_Units;
--------------------
-- Scan_Arguments --
--------------------
function Scan_Arguments return Boolean is
Kset : Boolean := False;
-- Set true if -k switch found
begin
Initialize_Option_Scan;
-- Scan options first
loop
case Getopt ("c gnat? h k? p q r v w x -GCC=!") is
when ASCII.NUL =>
exit;
when '-' =>
Gcc := new String'(Parameter);
Gcc_Set := True;
when 'c' =>
Compilation_Mode := True;
when 'g' =>
Gnat_Args :=
new Argument_List'(Gnat_Args.all &
new String'("-gnat" & Parameter));
when 'h' =>
Usage;
raise Terminate_Program;
when 'k' =>
declare
Param : String_Access := new String'(Parameter);
begin
if Param.all /= "" then
for J in Param'Range loop
if Param (J) not in '0' .. '9' then
if Hostparm.OpenVMS then
Error_Msg ("/FILE_NAME_MAX_LENGTH=nnn" &
" requires numeric parameter");
else
Error_Msg ("-k# requires numeric parameter");
end if;
return False;
end if;
end loop;
else
if Hostparm.OpenVMS then
Param := new String'("39");
else
Param := new String'("8");
end if;
end if;
Gnat_Args :=
new Argument_List'(Gnat_Args.all &
new String'("-gnatk" & Param.all));
Kset := True;
end;
when 'p' =>
Preserve_Mode := True;
when 'q' =>
Quiet_Mode := True;
when 'r' =>
Source_References := True;
when 'v' =>
Verbose_Mode := True;
-- Why is following written to standard error. Most other
-- tools write to standard output ???
Put (Standard_Error, "GNATCHOP ");
Put (Standard_Error, Gnatvsn.Gnat_Version_String);
Put_Line
(Standard_Error,
" Copyright 1998-2000, Ada Core Technologies Inc.");
when 'w' =>
Overwrite_Files := True;
when 'x' =>
Exit_On_Error := True;
when others =>
null;
end case;
end loop;
if not Kset and then Maximum_File_Name_Length > 0 then
-- If this system has restricted filename lengths, tell gnat1
-- about them, removing the leading blank from the image string.
Gnat_Args :=
new Argument_List'(Gnat_Args.all
& new String'("-gnatk"
& Maximum_File_Name_Length_String
(Maximum_File_Name_Length_String'First + 1
.. Maximum_File_Name_Length_String'Last)));
end if;
-- Scan file names
loop
declare
S : constant String := Get_Argument (Do_Expansion => True);
begin
exit when S = "";
File.Increment_Last;
File.Table (File.Last).Name := new String'(S);
File.Table (File.Last).SR_Name := null;
end;
end loop;
-- Case of more than one file where last file is a directory
if File.Last > 1
and then Is_Directory (File.Table (File.Last).Name.all)
then
Directory := File.Table (File.Last).Name;
File.Decrement_Last;
-- Make sure Directory is terminated with a directory separator,
-- so we can generate the output by just appending a filename.
if Directory (Directory'Last) /= Directory_Separator
and then Directory (Directory'Last) /= '/'
then
Directory := new String'(Directory.all & Directory_Separator);
end if;
-- At least one filename must be given
elsif File.Last = 0 then
Usage;
return False;
-- No directory given, set directory to null, so that we can just
-- concatenate the directory name to the file name unconditionally.
else
Directory := new String'("");
end if;
-- Finally check all filename arguments
for File_Num in 1 .. File.Last loop
declare
F : constant String := File.Table (File_Num).Name.all;
begin
if Is_Directory (F) then
Error_Msg (F & " is a directory, cannot be chopped");
return False;
elsif not Is_Regular_File (F) then
Error_Msg (F & " not found");
return False;
end if;
end;
end loop;
return True;
exception
when Invalid_Switch =>
Error_Msg ("invalid switch " & Full_Switch);
return False;
when Invalid_Parameter =>
if Hostparm.OpenVMS then
Error_Msg ("/FILE_NAME_MAX_LENGTH=nnn qualifier" &
" requires numeric parameter");
else
Error_Msg ("-k switch requires numeric parameter");
end if;
return False;
end Scan_Arguments;
----------------
-- Sort_Units --
----------------
procedure Sort_Units is
procedure Move (From : Natural; To : Natural);
-- Procedure used to sort the unit list
-- Unit.Table (To) := Unit_List (From); used by sort
function Lt (Left, Right : Natural) return Boolean;
-- Compares Left and Right units based on file name (first),
-- Chop_File (second) and Offset (third). This ordering is
-- important to keep the last version in case of duplicate files.
package Unit_Sort is new GNAT.Heap_Sort_G (Move, Lt);
-- Used for sorting on filename to detect duplicates
--------
-- Lt --
--------
function Lt (Left, Right : Natural) return Boolean is
L : Unit_Info renames
Unit.Table (Sorted_Units.Table (SUnit_Num (Left)));
R : Unit_Info renames
Unit.Table (Sorted_Units.Table (SUnit_Num (Right)));
begin
return L.File_Name.all < R.File_Name.all
or else (L.File_Name.all = R.File_Name.all
and then (L.Chop_File < R.Chop_File
or else (L.Chop_File = R.Chop_File
and then L.Offset < R.Offset)));
end Lt;
----------
-- Move --
----------
procedure Move (From : Natural; To : Natural) is
begin
Sorted_Units.Table (SUnit_Num (To)) :=
Sorted_Units.Table (SUnit_Num (From));
end Move;
-- Start of processing for Sort_Units
begin
Sorted_Units.Set_Last (SUnit_Num (Unit.Last));
for J in 1 .. Unit.Last loop
Sorted_Units.Table (SUnit_Num (J)) := J;
end loop;
-- Sort Unit.Table, using Sorted_Units.Table (0) as scratch
Unit_Sort.Sort (Natural (Unit.Last));
-- Set the Sorted_Index fields in the unit tables.
for J in 1 .. SUnit_Num (Unit.Last) loop
Unit.Table (Sorted_Units.Table (J)).Sorted_Index := J;
end loop;
end Sort_Units;
-----------
-- Usage --
-----------
procedure Usage is
begin
Put_Line
("Usage: gnatchop [-c] [-h] [-k#] " &
"[-r] [-p] [-q] [-v] [-w] [-x] [--GCC=xx] file [file ...] [dir]");
New_Line;
Put_Line
(" -c compilation mode, configuration pragmas " &
"follow RM rules");
Put_Line
(" -gnatxxx passes the -gnatxxx switch to gnat parser");
Put_Line
(" -h help: output this usage information");
Put_Line
(" -k# krunch file names of generated files to " &
"no more than # characters");
Put_Line
(" -k krunch file names of generated files to " &
"no more than 8 characters");
Put_Line
(" -p preserve time stamp, output files will " &
"have same stamp as input");
Put_Line
(" -q quiet mode, no output of generated file " &
"names");
Put_Line
(" -r generate Source_Reference pragmas refer" &
"encing original source file");
Put_Line
(" -v verbose mode, output version and generat" &
"ed commands");
Put_Line
(" -w overwrite existing filenames");
Put_Line
(" -x exit on error");
Put_Line
(" --GCC=xx specify the path of the gnat parser to be used");
New_Line;
Put_Line
(" file... list of source files to be chopped");
Put_Line
(" dir directory location for split files (defa" &
"ult = current directory)");
end Usage;
-----------------
-- Warning_Msg --
-----------------
procedure Warning_Msg (Message : String) is
begin
Warning_Count := Warning_Count + 1;
Put_Line (Standard_Error, "warning: " & Message);
end Warning_Msg;
-------------------------
-- Write_Chopped_Files --
-------------------------
function Write_Chopped_Files (Input : File_Num) return Boolean is
Name : aliased constant String :=
File.Table (Input).Name.all & ASCII.Nul;
FD : File_Descriptor;
Buffer : String_Access;
Success : Boolean;
TS_Time : OS_Time;
begin
FD := Open_Read (Name'Address, Binary);
TS_Time := File_Time_Stamp (FD);
if FD = Invalid_FD then
Error_Msg ("cannot open " & File.Table (Input).Name.all);
return False;
end if;
Read_File (FD, Buffer, Success);
if not Success then
Error_Msg ("cannot read " & File.Table (Input).Name.all);
Close (FD);
return False;
end if;
if not Quiet_Mode then
Put_Line ("splitting " & File.Table (Input).Name.all & " into:");
end if;
-- Only chop those units that come from this file
for Num in 1 .. Unit.Last loop
if Unit.Table (Num).Chop_File = Input then
Write_Unit (Buffer, Num, TS_Time, Success);
exit when not Success;
end if;
end loop;
Close (FD);
return Success;
end Write_Chopped_Files;
-----------------------
-- Write_Config_File --
-----------------------
procedure Write_Config_File (Input : File_Num; U : Unit_Num) is
FD : File_Descriptor;
Name : aliased constant String := "gnat.adc" & ASCII.NUL;
Buffer : String_Access;
Success : Boolean;
Append : Boolean;
Buffera : String_Access;
Bufferl : Natural;
begin
Write_gnat_adc := True;
FD := Open_Read_Write (Name'Address, Binary);
if FD = Invalid_FD then
FD := Create_File (Name'Address, Binary);
Append := False;
if not Quiet_Mode then
Put_Line ("writing configuration pragmas from " &
File.Table (Input).Name.all & " to gnat.adc");
end if;
else
Append := True;
if not Quiet_Mode then
Put_Line
("appending configuration pragmas from " &
File.Table (Input).Name.all & " to gnat.adc");
end if;
end if;
Success := FD /= Invalid_FD;
if not Success then
Error_Msg ("cannot create gnat.adc");
return;
end if;
-- In append mode, acquire existing gnat.adc file
if Append then
Read_File (FD, Buffera, Success);
if not Success then
Error_Msg ("cannot read gnat.adc");
return;
end if;
-- Find location of EOF byte if any to exclude from append
Bufferl := 1;
while Bufferl <= Buffera'Last
and then Buffera (Bufferl) /= EOF
loop
Bufferl := Bufferl + 1;
end loop;
Bufferl := Bufferl - 1;
Close (FD);
-- Write existing gnat.adc to new gnat.adc file
FD := Create_File (Name'Address, Binary);
Success := Write (FD, Buffera (1)'Address, Bufferl) = Bufferl;
if not Success then
Error_Msg ("error writing gnat.adc");
return;
end if;
end if;
Buffer := Get_Config_Pragmas (Input, U);
if Buffer /= null then
Success := Write (FD, Buffer.all'Address, Buffer'Length) =
Buffer'Length;
if not Success then
Error_Msg ("disk full writing gnat.adc");
return;
end if;
end if;
Close (FD);
end Write_Config_File;
-----------------------------------
-- Write_Source_Reference_Pragma --
-----------------------------------
procedure Write_Source_Reference_Pragma
(Info : Unit_Info;
Line : Line_Num;
FD : File_Descriptor;
EOL : EOL_String;
Success : in out Boolean)
is
FTE : File_Entry renames File.Table (Info.Chop_File);
Nam : String_Access;
begin
if Success and Source_References and not Info.SR_Present then
if FTE.SR_Name /= null then
Nam := FTE.SR_Name;
else
Nam := FTE.Name;
end if;
declare
Reference : aliased String :=
"pragma Source_Reference (000000, """
& Nam.all & """);" & EOL.Str;
Pos : Positive := Reference'First;
Lin : Line_Num := Line;
begin
while Reference (Pos + 1) /= ',' loop
Pos := Pos + 1;
end loop;
while Reference (Pos) = '0' loop
Reference (Pos) := Character'Val
(Character'Pos ('0') + Lin mod 10);
Lin := Lin / 10;
Pos := Pos - 1;
end loop;
-- Assume there are enough zeroes for any program length
pragma Assert (Lin = 0);
Success :=
Write (FD, Reference'Address, Reference'Length)
= Reference'Length;
end;
end if;
end Write_Source_Reference_Pragma;
----------------
-- Write_Unit --
----------------
procedure Write_Unit
(Source : access String;
Num : Unit_Num;
TS_Time : OS_Time;
Success : out Boolean)
is
Info : Unit_Info renames Unit.Table (Num);
FD : File_Descriptor;
Name : aliased constant String := Info.File_Name.all & ASCII.NUL;
Length : File_Offset;
EOL : constant EOL_String :=
Get_EOL (Source, Source'First + Info.Offset);
begin
-- Skip duplicated files
if Is_Duplicated (Info.Sorted_Index) then
Put_Line (" " & Info.File_Name.all & " skipped");
Success := Overwrite_Files;
return;
end if;
if Overwrite_Files then
FD := Create_File (Name'Address, Binary);
else
FD := Create_New_File (Name'Address, Binary);
end if;
Success := FD /= Invalid_FD;
if not Success then
Error_Msg ("cannot create " & Info.File_Name.all);
return;
end if;
-- A length of 0 indicates that the rest of the file belongs to
-- this unit. The actual length must be calculated now. Take into
-- account that the last character (EOF) must not be written.
if Info.Length = 0 then
Length := Source'Last - (Source'First + Info.Offset);
else
Length := Info.Length;
end if;
-- Prepend configuration pragmas if necessary
if Success and then Info.Bufferg /= null then
Write_Source_Reference_Pragma (Info, 1, FD, EOL, Success);
Success :=
Write (FD, Info.Bufferg.all'Address, Info.Bufferg'Length) =
Info.Bufferg'Length;
end if;
Write_Source_Reference_Pragma (Info, Info.Start_Line, FD, EOL, Success);
if Success then
Success := Write (FD, Source (Source'First + Info.Offset)'Address,
Length) = Length;
end if;
if not Success then
Error_Msg ("disk full writing " & Info.File_Name.all);
return;
end if;
if not Quiet_Mode then
Put_Line (" " & Info.File_Name.all);
end if;
Close (FD);
if Preserve_Mode then
File_Time_Stamp (Name'Address, TS_Time);
end if;
end Write_Unit;
-- Start of processing for gnatchop
begin
-- Process command line options and initialize global variables
if not Scan_Arguments then
Set_Exit_Status (Failure);
return;
end if;
-- Check presence of required executables
Gnat_Cmd := Locate_Executable (Gcc.all, not Gcc_Set);
if Gnat_Cmd = null then
goto No_Files_Written;
end if;
-- First parse all files and read offset information
for Num in 1 .. File.Last loop
if not Parse_File (Num) then
goto No_Files_Written;
end if;
end loop;
-- Check if any units have been found (assumes non-empty Unit.Table)
if Unit.Last = 0 then
if not Write_gnat_adc then
Error_Msg ("no compilation units found", Warning => True);
end if;
goto No_Files_Written;
end if;
Sort_Units;
-- Check if any duplicate files would be created. If so, emit
-- a warning if Overwrite_Files is true, otherwise generate an error.
if Report_Duplicate_Units and then not Overwrite_Files then
goto No_Files_Written;
end if;
-- Check if any files exist, if so do not write anything
-- Because all files have been parsed and checked already,
-- there won't be any duplicates
if not Overwrite_Files and then Files_Exist then
goto No_Files_Written;
end if;
-- After this point, all source files are read in succession
-- and chopped into their destination files.
-- As the Source_File_Name pragmas are handled as logical file 0,
-- write it first.
for F in 1 .. File.Last loop
if not Write_Chopped_Files (F) then
Set_Exit_Status (Failure);
return;
end if;
end loop;
if Warning_Count > 0 then
declare
Warnings_Msg : String := Warning_Count'Img & " warning(s)";
begin
Error_Msg (Warnings_Msg (2 .. Warnings_Msg'Last));
end;
end if;
return;
<<No_Files_Written>>
-- Special error exit for all situations where no files have
-- been written.
if not Write_gnat_adc then
Error_Msg ("no source files written", Warning => True);
end if;
return;
exception
when Terminate_Program =>
null;
end Gnatchop;
|