1 /**************************************************************
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 *
20 *************************************************************/
21
22
23 #if defined(_MSC_VER) && (_MSC_VER > 1310)
24 #define _USE_32BIT_TIME_T
25 #endif
26
27 #include <stdio.h>
28 #ifdef UNX
29 #include <stdlib.h>
30 #endif
31 #include <ctype.h>
32 #include "cppdef.h"
33 #include "cpp.h"
34
35 #include "time.h" /* BP */
36
37 #ifndef _STRING_H
38 #include <string.h>
39 #endif
40
41 #ifndef _NO_PROTO
42 int AddInclude( char *pIncStr ); /* BP, 11.09.91, Forward-Deklaration */
43 #endif
44
45 #if (OSL_DEBUG_LEVEL > 1) && (HOST == SYS_VMS || HOST == SYS_UNIX)
46 #include <signal.h>
47 #endif
48
InitCpp3()49 void InitCpp3()
50 {
51 }
52
53
54 int
openfile(char * filename)55 openfile(char* filename)
56 /*
57 * Open a file, add it to the linked list of open files.
58 * This is called only from openfile() above.
59 */
60 {
61 register FILE *fp;
62
63 if ((fp = fopen(filename, "r")) == NULL) {
64 #if OSL_DEBUG_LEVEL > 1
65 if ( debug || !bDumpDefs )
66 perror(filename);
67 #endif
68 return (FALSE);
69 }
70 #if OSL_DEBUG_LEVEL > 1
71 if (debug)
72 fprintf(stderr, "Reading from \"%s\"\n", filename);
73 #endif
74 addfile(fp, filename);
75 return (TRUE);
76 }
77
addfile(FILE * fp,char * filename)78 void addfile(FILE* fp, char* filename)
79 /*
80 * Initialize tables for this open file. This is called from openfile()
81 * above (for #include files), and from the entry to cpp to open the main
82 * input file. It calls a common routine, getfile() to build the FILEINFO
83 * structure which is used to read characters. (getfile() is also called
84 * to setup a macro replacement.)
85 */
86 {
87 register FILEINFO *file;
88 /* #ifndef _NO_PROTO */
89 extern FILEINFO *getfile( int bufsize, char *filename ); /* BP */
90 /* #endif */
91 file = getfile(NBUFF, filename);
92 file->fp = fp; /* Better remember FILE * */
93 file->buffer[0] = EOS; /* Initialize for first read */
94 line = 1; /* Working on line 1 now */
95 wrongline = TRUE; /* Force out initial #line */
96 }
97
setincdirs()98 void setincdirs()
99 /*
100 * Append system-specific directories to the include directory list.
101 * Called only when cpp is started.
102 */
103 {
104
105 #ifdef CPP_INCLUDE
106 *incend++ = CPP_INCLUDE;
107 #define IS_INCLUDE 1
108 #else
109 #define IS_INCLUDE 0
110 #endif
111
112 #if HOST == SYS_UNIX
113 *incend++ = "/usr/include";
114 #define MAXINCLUDE (NINCLUDE - 1 - IS_INCLUDE)
115 #endif
116
117 #if HOST == SYS_VMS
118 extern char *getenv();
119
120 if (getenv("C$LIBRARY") != NULL)
121 *incend++ = "C$LIBRARY:";
122 *incend++ = "SYS$LIBRARY:";
123 #define MAXINCLUDE (NINCLUDE - 2 - IS_INCLUDE)
124 #endif
125
126 #if HOST == SYS_RSX
127 extern int $$rsts; /* TRUE on RSTS/E */
128 extern int $$pos; /* TRUE on PRO-350 P/OS */
129 extern int $$vms; /* TRUE on VMS compat. */
130
131 if ($$pos) { /* P/OS? */
132 *incend++ = "SY:[ZZDECUSC]"; /* C #includes */
133 *incend++ = "LB:[1,5]"; /* RSX library */
134 }
135 else if ($$rsts) { /* RSTS/E? */
136 *incend++ = "SY:@"; /* User-defined account */
137 *incend++ = "C:"; /* Decus-C library */
138 *incend++ = "LB:[1,1]"; /* RSX library */
139 }
140 else if ($$vms) { /* VMS compatibility? */
141 *incend++ = "C:";
142 }
143 else { /* Plain old RSX/IAS */
144 *incend++ = "LB:[1,1]";
145 }
146 #define MAXINCLUDE (NINCLUDE - 3 - IS_INCLUDE)
147 #endif
148
149 #if HOST == SYS_RT11
150 extern int $$rsts; /* RSTS/E emulation? */
151
152 if ($$rsts)
153 *incend++ = "SY:@"; /* User-defined account */
154 *incend++ = "C:"; /* Decus-C library disk */
155 *incend++ = "SY:"; /* System (boot) disk */
156 #define MAXINCLUDE (NINCLUDE - 3 - IS_INCLUDE)
157 #endif
158
159 #if HOST == SYS_UNKNOWN
160 /*
161 * BP: 25.07.91, Kontext: GenMake
162 * Unter DOS wird nun auch die Environment-Variable INCLUDE ausgewetet.
163 * Es kommt erschwerend hinzu, dass alle Eintraege, die mit ';' getrennt
164 * sind, mit in die Liste aufenommen werden muessen.
165 * Dies wird mit der Funktion strtok() realisiert.
166 * Vorsicht bei der Benutzung von malloc !!!
167 * In savestring wird naemlich getmem() verwendet. Vermutlich kommen sich
168 * die beiden Funktion in die Quere. Als ich malloc statt savestring
169 * verwendete knallte es in strcpy() !
170 */
171
172 #if !defined( ZTC ) && !defined( WNT ) && !defined(BLC) && ! defined UNX && ! defined OS2
173 extern char *getenv( char *pStr ); /* BP */
174 #endif
175 char *pIncGetEnv = NULL; /* Pointer auf INCLUDE */
176
177 if ( ( pIncGetEnv = getenv("INCLUDE") ) != NULL )
178 AddInclude( pIncGetEnv );
179
180 #define MAXINCLUDE (NINCLUDE - 3 - IS_INCLUDE)
181 #endif
182
183
184 }
185
186 /* BP: 11.09.91, Kontext: Erweiterung des INCLUDE-Services
187 * Bislang konnte der cpp keine Include-Angaben in der Kommandozeile
188 * vertragen, bei denen die directries mit ';' getrennt wurden.
189 * Dies ist auch verstaendlich, da dieses cpp fuer UNIX-Systeme
190 * massgeschneidert wurde und in UNI die ';' als Zeichen zum Abschluss
191 * von Kommandos gilt.
192 */
193
AddInclude(char * pIncStr)194 int AddInclude( char* pIncStr )
195 {
196 char *pIncEnv = NULL; /* Kopie des INCLUDE */
197 char *pIncPos; /* wandert zum naechsten */
198
199 pIncEnv = savestring( pIncStr );
200 pIncPos = strtok( pIncEnv, ";" );
201
202 while( pIncPos != NULL )
203 {
204 if (incend >= &incdir[MAXINCLUDE])
205 cfatal("Too many include directories", NULLST);
206 *incend++ = pIncPos;
207 pIncPos = strtok( NULL, ";" );
208 }
209 return( 1 );
210 }
211
212
213
214
215 int
dooptions(int argc,char ** argv)216 dooptions(int argc, char** argv)
217 /*
218 * dooptions is called to process command line arguments (-Detc).
219 * It is called only at cpp startup.
220 */
221 {
222 register char *ap;
223 register DEFBUF *dp;
224 register int c;
225 int i, j;
226 char *arg;
227 SIZES *sizp; /* For -S */
228 int size; /* For -S */
229 int isdatum; /* FALSE for -S* */
230 int endtest; /* For -S */
231
232 for (i = j = 1; i < argc; i++) {
233 arg = ap = argv[i];
234
235 if (*ap++ != '-' || *ap == EOS)
236 {
237 argv[j++] = argv[i];
238 }
239 else {
240 c = *ap++; /* Option byte */
241 if (islower(c)) /* Normalize case */
242 c = toupper(c);
243 switch (c) { /* Command character */
244 case 'C': /* Keep comments */
245 cflag = TRUE;
246 keepcomments = TRUE;
247 break;
248
249 case 'D': /* Define symbol */
250 #if HOST != SYS_UNIX
251 /* zap_uc(ap); */ /* Force define to U.C. */
252 #endif
253 /*
254 * If the option is just "-Dfoo", make it -Dfoo=1
255 */
256 while (*ap != EOS && *ap != '=')
257 ap++;
258 if (*ap == EOS)
259 ap = "1";
260 else
261 *ap++ = EOS;
262 /*
263 * Now, save the word and its definition.
264 */
265 dp = defendel(argv[i] + 2, FALSE);
266 dp->repl = savestring(ap);
267 dp->nargs = DEF_NOARGS;
268 break;
269
270 case 'E': /* Ignore non-fatal */
271 eflag = TRUE; /* errors. */
272 break;
273
274 case 'I': /* Include directory */
275 AddInclude( ap ); /* BP, 11.09.91 */
276 break;
277
278 case 'N': /* No predefineds */
279 nflag++; /* Repeat to undefine */
280 break; /* __LINE__, etc. */
281
282 case 'S':
283 sizp = size_table;
284 if (0 != (isdatum = (*ap != '*'))) /* If it's just -S, */
285 endtest = T_FPTR; /* Stop here */
286 else { /* But if it's -S* */
287 ap++; /* Step over '*' */
288 endtest = 0; /* Stop at end marker */
289 }
290 while (sizp->bits != endtest && *ap != EOS) {
291 if (!isdigit(*ap)) { /* Skip to next digit */
292 ap++;
293 continue;
294 }
295 size = 0; /* Compile the value */
296 while (isdigit(*ap)) {
297 size *= 10;
298 size += (*ap++ - '0');
299 }
300 if (isdatum)
301 sizp->size = size; /* Datum size */
302 else
303 sizp->psize = size; /* Pointer size */
304 sizp++;
305 }
306 if (sizp->bits != endtest)
307 cwarn("-S, too few values specified in %s", argv[i]);
308 else if (*ap != EOS)
309 cwarn("-S, too many values, \"%s\" unused", ap);
310 break;
311
312 case 'U': /* Undefine symbol */
313 #if HOST != SYS_UNIX
314 /* zap_uc(ap);*/
315 #endif
316 if (defendel(ap, TRUE) == NULL)
317 cwarn("\"%s\" wasn't defined", ap);
318 break;
319
320 #if OSL_DEBUG_LEVEL > 1
321 case 'X': /* Debug */
322 debug = (isdigit(*ap)) ? atoi(ap) : 1;
323 #if (HOST == SYS_VMS || HOST == SYS_UNIX)
324 signal(SIGINT, (void (*)(int)) abort); /* Trap "interrupt" */
325 #endif
326 fprintf(stderr, "Debug set to %d\n", debug);
327 break;
328 #endif
329
330 #if OSL_DEBUG_LEVEL > 1
331 case 'P': /* #define's dump */
332 bDumpDefs = 1;
333 fprintf(stderr, "Dump #define's is on\n");
334 break;
335 #endif
336
337 default: /* What is this one? */
338 cwarn("Unknown option \"%s\"", arg);
339 fprintf(stderr, "The following options are valid:\n\
340 -C\t\t\tWrite source file comments to output\n\
341 -Dsymbol=value\tDefine a symbol with the given (optional) value\n\
342 -Idirectory\t\tAdd a directory to the #include search list\n\
343 -N\t\t\tDon't predefine target-specific names\n\
344 -Stext\t\tSpecify sizes for #if sizeof\n\
345 -Usymbol\t\tUndefine symbol\n");
346 #if OSL_DEBUG_LEVEL > 1
347 fprintf(stderr, " -Xvalue\t\tSet internal debug flag\n");
348 fprintf(stderr, " -P\t\t\tdump #define's\n");
349 #endif
350 break;
351 } /* Switch on all options */
352 } /* If it's a -option */
353 } /* For all arguments */
354 #if OSL_DEBUG_LEVEL > 1
355 if ( (bDumpDefs ? j > 4 : j > 3) ) {
356 #else
357 if (j > 3) {
358 #endif
359 cerror(
360 "Too many file arguments. Usage: cpp [input [output]]",
361 NULLST);
362 }
363 return (j); /* Return new argc */
364 }
365
366 int
367 readoptions(char* filename, char*** pfargv)
368 {
369 FILE *fp;
370 int c;
371 int bInQuotes = 0;
372 char optbuff[1024], *poptbuff;
373 int fargc=0, back;
374 char *fargv[PARALIMIT], **pfa;
375
376 pfa=*pfargv=malloc(sizeof(fargv));
377
378 poptbuff=&optbuff[0];
379 filename++;
380 if ((fp = fopen(filename, "r")) == NULL) {
381 #if OSL_DEBUG_LEVEL > 1
382 if ( debug || !bDumpDefs )
383 perror(filename);
384 #endif
385 return (FALSE);
386 }
387 do
388 {
389 /*
390 * #i27914# double ticks '"' now have a duplicate function:
391 * 1. they define a string ( e.g. -DFOO="baz" )
392 * 2. a string can contain spaces, so -DFOO="baz zum" defines one
393 * argument no two !
394 */
395 c=fgetc(fp);
396 if ( c != ' ' && c != CR && c != NL && c != HT && c != EOF)
397 {
398 *poptbuff++=(char)c;
399 if( c == '"' )
400 bInQuotes = ~bInQuotes;
401 }
402 else
403 {
404 if( c != EOF && bInQuotes )
405 *poptbuff++=(char)c;
406 else
407 {
408 *poptbuff=EOS;
409 if (strlen(optbuff)>0)
410 {
411 pfa[fargc+1]=malloc(strlen(optbuff)+1);
412 strcpy(pfa[fargc+1],optbuff);
413 fargc++;
414 pfa[fargc+1]=0;
415 poptbuff=&optbuff[0];
416 }
417 }
418 }
419 }
420 while ( c != EOF );
421
422 fclose(fp);
423 back=dooptions(fargc+1,pfa);
424
425 return (back);
426 }
427
428
429
430 #if HOST != SYS_UNIX
431 FILE_LOCAL void
432 zap_uc(char* ap)
433 /*
434 * Dec operating systems mangle upper-lower case in command lines.
435 * This routine forces the -D and -U arguments to uppercase.
436 * It is called only on cpp startup by dooptions().
437 */
438 {
439 while (*ap != EOS) {
440 /*
441 * Don't use islower() here so it works with Multinational
442 */
443 if (*ap >= 'a' && *ap <= 'z')
444 *ap = (char)toupper(*ap);
445 ap++;
446 }
447 }
448 #endif
449
450 void initdefines()
451 /*
452 * Initialize the built-in #define's. There are two flavors:
453 * #define decus 1 (static definitions)
454 * #define __FILE__ ?? (dynamic, evaluated by magic)
455 * Called only on cpp startup.
456 *
457 * Note: the built-in static definitions are supressed by the -N option.
458 * __LINE__, __FILE__, and __DATE__ are always present.
459 */
460 {
461 register char **pp;
462 register char *tp;
463 register DEFBUF *dp;
464 int i;
465 long tvec;
466
467 #if !defined( ZTC ) && !defined( WNT ) && !defined(BLC) && !defined(G3)
468 extern char *ctime();
469 #endif
470
471 /*
472 * Predefine the built-in symbols. Allow the
473 * implementor to pre-define a symbol as "" to
474 * eliminate it.
475 */
476 if (nflag == 0) {
477 for (pp = preset; *pp != NULL; pp++) {
478 if (*pp[0] != EOS) {
479 dp = defendel(*pp, FALSE);
480 dp->repl = savestring("1");
481 dp->nargs = DEF_NOARGS;
482 }
483 }
484 }
485 /*
486 * The magic pre-defines (__FILE__ and __LINE__ are
487 * initialized with negative argument counts. expand()
488 * notices this and calls the appropriate routine.
489 * DEF_NOARGS is one greater than the first "magic" definition.
490 */
491 if (nflag < 2) {
492 for (pp = magic, i = DEF_NOARGS; *pp != NULL; pp++) {
493 dp = defendel(*pp, FALSE);
494 dp->nargs = --i;
495 }
496 #if OK_DATE
497 /*
498 * Define __DATE__ as today's date.
499 */
500 dp = defendel("__DATE__", FALSE);
501 dp->repl = tp = getmem(27);
502 dp->nargs = DEF_NOARGS;
503 time( (time_t*)&tvec);
504 *tp++ = '"';
505 strcpy(tp, ctime((const time_t*)&tvec));
506 tp[24] = '"'; /* Overwrite newline */
507 #endif
508 }
509 }
510
511 #if HOST == SYS_VMS
512 /*
513 * getredirection() is intended to aid in porting C programs
514 * to VMS (Vax-11 C) which does not support '>' and '<'
515 * I/O redirection. With suitable modification, it may
516 * useful for other portability problems as well.
517 */
518
519 int
520 getredirection(argc, argv)
521 int argc;
522 char **argv;
523 /*
524 * Process vms redirection arg's. Exit if any error is seen.
525 * If getredirection() processes an argument, it is erased
526 * from the vector. getredirection() returns a new argc value.
527 *
528 * Warning: do not try to simplify the code for vms. The code
529 * presupposes that getredirection() is called before any data is
530 * read from stdin or written to stdout.
531 *
532 * Normal usage is as follows:
533 *
534 * main(argc, argv)
535 * int argc;
536 * char *argv[];
537 * {
538 * argc = getredirection(argc, argv);
539 * }
540 */
541 {
542 register char *ap; /* Argument pointer */
543 int i; /* argv[] index */
544 int j; /* Output index */
545 int file; /* File_descriptor */
546 extern int errno; /* Last vms i/o error */
547
548 for (j = i = 1; i < argc; i++) { /* Do all arguments */
549 switch (*(ap = argv[i])) {
550 case '<': /* <file */
551 if (freopen(++ap, "r", stdin) == NULL) {
552 perror(ap); /* Can't find file */
553 exit(errno); /* Is a fatal error */
554 }
555 break;
556
557 case '>': /* >file or >>file */
558 if (*++ap == '>') { /* >>file */
559 /*
560 * If the file exists, and is writable by us,
561 * call freopen to append to the file (using the
562 * file's current attributes). Otherwise, create
563 * a new file with "vanilla" attributes as if the
564 * argument was given as ">filename".
565 * access(name, 2) returns zero if we can write on
566 * the specified file.
567 */
568 if (access(++ap, 2) == 0) {
569 if (freopen(ap, "a", stdout) != NULL)
570 break; /* Exit case statement */
571 perror(ap); /* Error, can't append */
572 exit(errno); /* After access test */
573 } /* If file accessable */
574 }
575 /*
576 * On vms, we want to create the file using "standard"
577 * record attributes. creat(...) creates the file
578 * using the caller's default protection mask and
579 * "variable length, implied carriage return"
580 * attributes. dup2() associates the file with stdout.
581 */
582 if ((file = creat(ap, 0, "rat=cr", "rfm=var")) == -1
583 || dup2(file, fileno(stdout)) == -1) {
584 perror(ap); /* Can't create file */
585 exit(errno); /* is a fatal error */
586 } /* If '>' creation */
587 break; /* Exit case test */
588
589 default:
590 argv[j++] = ap; /* Not a redirector */
591 break; /* Exit case test */
592 }
593 } /* For all arguments */
594 argv[j] = NULL; /* Terminate argv[] */
595 return (j); /* Return new argc */
596 }
597 #endif
598