1 #ifndef lint
2 static char sccsid[] = "@(#)cpp.c 1.22 11/07/90";
3 #endif lint
4
5 #ifdef FLEXNAMES
6 #define NCPS 128
7 #else
8 #define NCPS 8
9 #endif
10
11 #include <sys/param.h>
12 #include <stdio.h>
13 #include <ctype.h>
14 #include "pathnames.h"
15
16 /* C command
17 /* written by John F. Reiser
18 /* July/August 1978
19 */
20
21 #define STATIC
22
23 #define FIRSTOPEN -2
24 #define STDIN 0
25 #define READ 0
26 #define WRITE 1
27 #define SALT '#'
28 #if !defined BUFSIZ || BUFSIZ < 8192
29 #undef BUFSIZ
30 #define BUFSIZ 8192
31 #endif
32
33 char *pbeg,*pbuf,*pend;
34 char *outp,*inp;
35 char *newp;
36 char cinit;
37
38 /* some code depends on whether characters are sign or zero extended */
39 /* #if '\377' < 0 not used here, old cpp doesn't understand */
40 #if pdp11 | vax | mc68000 | tahoe
41 #define COFF 128
42 #else
43 #define COFF 0
44 #endif
45
46 # if gcos
47 #define ALFSIZ 512 /* alphabet size */
48 # else
49 #define ALFSIZ 256 /* alphabet size */
50 # endif
51 char macbit[ALFSIZ+11];
52 char toktyp[ALFSIZ];
53 #define BLANK 1
54 #define IDENT 2
55 #define NUMBR 3
56
57 /* a superimposed code is used to reduce the number of calls to the
58 /* symbol table lookup routine. (if the kth character of an identifier
59 /* is 'a' and there are no macro names whose kth character is 'a'
60 /* then the identifier cannot be a macro name, hence there is no need
61 /* to look in the symbol table.) 'scw1' enables the test based on
62 /* single characters and their position in the identifier. 'scw2'
63 /* enables the test based on adjacent pairs of characters and their
64 /* position in the identifier. scw1 typically costs 1 indexed fetch,
65 /* an AND, and a jump per character of identifier, until the identifier
66 /* is known as a non-macro name or until the end of the identifier.
67 /* scw1 is inexpensive. scw2 typically costs 4 indexed fetches,
68 /* an add, an AND, and a jump per character of identifier, but it is also
69 /* slightly more effective at reducing symbol table searches.
70 /* scw2 usually costs too much because the symbol table search is
71 /* usually short; but if symbol table search should become expensive,
72 /* the code is here.
73 /* using both scw1 and scw2 is of dubious value.
74 */
75 #define scw1 1
76 #define scw2 0
77
78 #if scw2
79 char t21[ALFSIZ],t22[ALFSIZ],t23[ALFSIZ+NCPS];
80 #endif
81
82 #if scw1
83 #define b0 1
84 #define b1 2
85 #define b2 4
86 #define b3 8
87 #define b4 16
88 #define b5 32
89 #define b6 64
90 #define b7 128
91 #endif
92
93 #define IB 1
94 #define SB 2
95 #define NB 4
96 #define CB 8
97 #define QB 16
98 #define WB 32
99 char fastab[ALFSIZ];
100 char slotab[ALFSIZ];
101 char *ptrtab;
102 #define isslo (ptrtab==(slotab+COFF))
103 #define isid(a) ((fastab+COFF)[a]&IB)
104 #define isspc(a) (ptrtab[a]&SB)
105 #define isnum(a) ((fastab+COFF)[a]&NB)
106 #define iscom(a) ((fastab+COFF)[a]&CB)
107 #define isquo(a) ((fastab+COFF)[a]&QB)
108 #define iswarn(a) ((fastab+COFF)[a]&WB)
109
110 #define eob(a) ((a)>=pend)
111 #define bob(a) (pbeg>=(a))
112
113 # define cputc(a,b) if(!flslvl) putc(a,b)
114
115 char buffer[NCPS+BUFSIZ+BUFSIZ+NCPS];
116
117 char *lastcopy;
118
119 char *malloc(), *realloc();
120
121 # define DROP 0xFE /* special character not legal ASCII or EBCDIC */
122 # define WARN DROP
123 # define SAME 0
124 # define MAXINC 15
125 # define MAXFRE 14 /* max buffers of macro pushback */
126 # define MAXFRM 31 /* max number of formals/actuals to a macro */
127
128 static char warnc = WARN;
129
130 int mactop,fretop;
131 char *instack[MAXFRE],*bufstack[MAXFRE],*endbuf[MAXFRE];
132
133 int plvl; /* parenthesis level during scan for macro actuals */
134 int maclin; /* line number of macro call requiring actuals */
135 char *macfil; /* file name of macro call requiring actuals */
136 char *macnam; /* name of macro requiring actuals */
137 int maclvl; /* # calls since last decrease in nesting level */
138 char *macforw; /* pointer which must be exceeded to decrease nesting level */
139 int macdam; /* offset to macforw due to buffer shifting */
140
141 #if tgp
142 int tgpscan; /* flag for dump(); */
143 #endif
144
145 STATIC int inctop[MAXINC];
146 STATIC char *fnames[MAXINC];
147 STATIC char *dirnams[MAXINC]; /* actual directory of #include files */
148 STATIC int fins[MAXINC];
149 STATIC int lineno[MAXINC];
150
151 STATIC char *dirs[10]; /* -I and <> directories */
152 char *strdex(), *copy(), *subst(), *trmdir();
153 struct symtab *stsym();
154 STATIC int fin = FIRSTOPEN;
155 STATIC FILE *fout = stdout;
156 STATIC int nd = 1;
157 STATIC int pflag; /* don't put out lines "# 12 foo.c" */
158 int passcom; /* don't delete comments */
159 int incomment; /* True if parsing a comment */
160 STATIC int rflag; /* allow macro recursion */
161 STATIC int mflag; /* generate makefile dependencies */
162 STATIC char *infile; /* name of .o file to build dependencies from */
163 STATIC FILE *mout; /* file to place dependencies on */
164 #define START 1
165 #define CONT 2
166 #define BACK 3
167 STATIC int ifno;
168 # define NPREDEF 50
169 STATIC char *prespc[NPREDEF];
170 STATIC char **predef = prespc;
171 STATIC char *punspc[NPREDEF];
172 STATIC char **prund = punspc;
173 STATIC int exfail;
174 struct symtab {
175 char *name;
176 char *value;
177 } *lastsym, *lookup(), *slookup();
178
179 # if gcos
180 #include <setjmp.h>
181 static jmp_buf env;
182 # define main mainpp
183 # undef exit
184 # define exit(S) longjmp(env, 1)
185 # define open(S,D) fileno(fopen(S, "r"))
186 # define close(F) fclose(_f[F])
187 extern FILE *_f[];
188 # define symsiz 500
189 # else
190 # define symsiz 5000 /* std = 500, wnj aug 1979 */
191 # endif
192 STATIC struct symtab stab[symsiz];
193
194 STATIC struct symtab *defloc;
195 STATIC struct symtab *udfloc;
196 STATIC struct symtab *incloc;
197 STATIC struct symtab *ifloc;
198 STATIC struct symtab *elsloc;
199 STATIC struct symtab *eifloc;
200 STATIC struct symtab *ifdloc;
201 STATIC struct symtab *ifnloc;
202 STATIC struct symtab *ysysloc;
203 STATIC struct symtab *varloc;
204 STATIC struct symtab *lneloc;
205 STATIC struct symtab *ulnloc;
206 STATIC struct symtab *uflloc;
207 STATIC struct symtab *identloc; /* Sys 5r3 compatibility */
208 STATIC int trulvl;
209 STATIC int flslvl;
210
sayline(where)211 sayline(where)
212 int where;
213 {
214 if (mflag && where==START) fprintf(mout, "%s: %s\n", infile, fnames[ifno]);
215 if (pflag==0) fprintf(fout,"# %d \"%s\"\n", lineno[ifno], fnames[ifno]);
216 }
217
218 /* data structure guide
219 /*
220 /* most of the scanning takes place in the buffer:
221 /*
222 /* (low address) (high address)
223 /* pbeg pbuf pend
224 /* | <-- BUFSIZ chars --> | <-- BUFSIZ chars --> |
225 /* _______________________________________________________________________
226 /* |_______________________________________________________________________|
227 /* | | |
228 /* |<-- waiting -->| |<-- waiting -->
229 /* | to be |<-- current -->| to be
230 /* | written | token | scanned
231 /* | | |
232 /* outp inp p
233 /*
234 /* *outp first char not yet written to output file
235 /* *inp first char of current token
236 /* *p first char not yet scanned
237 /*
238 /* macro expansion: write from *outp to *inp (chars waiting to be written),
239 /* ignore from *inp to *p (chars of the macro call), place generated
240 /* characters in front of *p (in reverse order), update pointers,
241 /* resume scanning.
242 /*
243 /* symbol table pointers point to just beyond the end of macro definitions;
244 /* the first preceding character is the number of formal parameters.
245 /* the appearance of a formal in the body of a definition is marked by
246 /* 2 chars: the char WARN, and a char containing the parameter number.
247 /* the first char of a definition is preceded by a zero character.
248 /*
249 /* when macro expansion attempts to back up over the beginning of the
250 /* buffer, some characters preceding *pend are saved in a side buffer,
251 /* the address of the side buffer is put on 'instack', and the rest
252 /* of the main buffer is moved to the right. the end of the saved buffer
253 /* is kept in 'endbuf' since there may be nulls in the saved buffer.
254 /*
255 /* similar action is taken when an 'include' statement is processed,
256 /* except that the main buffer must be completely emptied. the array
257 /* element 'inctop[ifno]' records the last side buffer saved when
258 /* file 'ifno' was included. these buffers remain dormant while
259 /* the file is being read, and are reactivated at end-of-file.
260 /*
261 /* instack[0 : mactop] holds the addresses of all pending side buffers.
262 /* instack[inctop[ifno]+1 : mactop-1] holds the addresses of the side
263 /* buffers which are "live"; the side buffers instack[0 : inctop[ifno]]
264 /* are dormant, waiting for end-of-file on the current file.
265 /*
266 /* space for side buffers is obtained from 'malloc' and is never returned.
267 /* bufstack[0:fretop-1] holds addresses of side buffers which
268 /* are available for use.
269 */
270
dump()271 dump() {
272 /* write part of buffer which lies between outp and inp .
273 /* this should be a direct call to 'write', but the system slows to a crawl
274 /* if it has to do an unaligned copy. thus we buffer. this silly loop
275 /* is 15% of the total time, thus even the 'putc' macro is too slow.
276 */
277 register char *p1,*p2; register FILE *f;
278 if ((p1=outp)==inp || flslvl!=0) return;
279 #if tgp
280 #define MAXOUT 80
281 if (!tgpscan) {/* scan again to insure <= MAXOUT chars between linefeeds */
282 register char c,*pblank; char savc,stopc,brk;
283 tgpscan=1; brk=stopc=pblank=0; p2=inp; savc= *p2; *p2='\0';
284 while (c= *p1++) {
285 if (c=='\\') c= *p1++;
286 if (stopc==c) stopc=0;
287 else if (c=='"' || c=='\'') stopc=c;
288 if (p1-outp>MAXOUT && pblank!=0) {
289 *pblank++='\n'; inp=pblank; dump(); brk=1; pblank=0;
290 }
291 if (c==' ' && stopc==0) pblank=p1-1;
292 }
293 if (brk) sayline(CONT);
294 *p2=savc; inp=p2; p1=outp; tgpscan=0;
295 }
296 #endif
297 f=fout;
298 # if gcos
299 /* filter out "$ program c" card if first line of input */
300 /* gmatch is a simple pattern matcher in the GCOS Standard Library */
301 { static int gmfirst = 0;
302 if (!gmfirst) {
303 ++gmfirst;
304 if (gmatch(p1, "^$*program[ \t]*c*"))
305 p1 = strdex(p1, '\n');
306 }
307 }
308 # endif
309 while (p1<inp) putc(*p1++,f);
310 outp=p1;
311 }
312
313 char *
refill(p)314 refill(p) register char *p; {
315 /* dump buffer. save chars from inp to p. read into buffer at pbuf,
316 /* contiguous with p. update pointers, return new p.
317 */
318 register char *np,*op; register int ninbuf;
319 dump(); np=pbuf-(p-inp); op=inp;
320 if (bob(np+1)) {pperror("token too long"); np=pbeg; p=inp+BUFSIZ;}
321 macdam += np-inp; outp=inp=np;
322 while (op<p) *np++= *op++;
323 p=np;
324 for (;;) {
325 if (mactop>inctop[ifno]) {/* retrieve hunk of pushed-back macro text */
326 op=instack[--mactop]; np=pbuf;
327 do {while (*np++= *op++);} while (op<endbuf[mactop]); pend=np-1;
328 /* make buffer space avail for 'include' processing */
329 if (fretop<MAXFRE) bufstack[fretop++]=instack[mactop];
330 return(p);
331 } else {/* get more text from file(s) */
332 maclvl=0;
333 if (0<(ninbuf=read(fin,pbuf,BUFSIZ))) {
334 pend=pbuf+ninbuf; *pend='\0';
335 return(p);
336 }
337 /* end of #include file */
338 if (ifno==0) {/* end of input */
339 if (plvl!=0) {
340 int n=plvl,tlin=lineno[ifno]; char *tfil=fnames[ifno];
341 lineno[ifno]=maclin; fnames[ifno]=macfil;
342 pperror("%s: unterminated macro call",macnam);
343 lineno[ifno]=tlin; fnames[ifno]=tfil;
344 np=p; *np++='\n'; /* shut off unterminated quoted string */
345 while (--n>=0) *np++=')'; /* supply missing parens */
346 pend=np; *np='\0'; if (plvl<0) plvl=0;
347 return(p);
348 }
349 if (trulvl || flslvl)
350 if (incomment)
351 pperror("unterminated comment");
352 else
353 pperror("missing endif");
354 inp=p; dump(); exit(exfail);
355 }
356 close(fin); fin=fins[--ifno]; dirs[0]=dirnams[ifno]; sayline(BACK);
357 }
358 }
359 }
360
361 #define BEG 0
362 #define LF 1
363
364 char *
cotoken(p)365 cotoken(p) register char *p; {
366 register int c,i; char quoc;
367 static int state = BEG;
368
369 if (state!=BEG) goto prevlf;
370 for (;;) {
371 again:
372 while (!isspc(*p++));
373 switch (*(inp=p-1)) {
374 case 0: {
375 if (eob(--p)) {p=refill(p); goto again;}
376 else ++p; /* ignore null byte */
377 } break;
378 case '|': case '&': for (;;) {/* sloscan only */
379 if (*p++== *inp) break;
380 if (eob(--p)) p=refill(p);
381 else break;
382 } break;
383 case '=': case '!': for (;;) {/* sloscan only */
384 if (*p++=='=') break;
385 if (eob(--p)) p=refill(p);
386 else break;
387 } break;
388 case '<': case '>': for (;;) {/* sloscan only */
389 if (*p++=='=' || p[-2]==p[-1]) break;
390 if (eob(--p)) p=refill(p);
391 else break;
392 } break;
393 case '\\': for (;;) {
394 if (*p++=='\n') {++lineno[ifno]; break;}
395 if (eob(--p)) p=refill(p);
396 else {++p; break;}
397 } break;
398 case '/': for (;;) {
399 if (*p++=='*') {/* comment */
400 incomment++;
401 if (!passcom) {inp=p-2; dump(); ++flslvl;}
402 for (;;) {
403 while (!iscom(*p++));
404 if (p[-1]=='*') for (;;) {
405 if (*p++=='/') goto endcom;
406 if (eob(--p)) {
407 if (!passcom) {inp=p; p=refill(p);}
408 else if ((p-inp)>=BUFSIZ) {/* split long comment */
409 inp=p; p=refill(p); /* last char written is '*' */
410 cputc('/',fout); /* terminate first part */
411 /* and fake start of 2nd */
412 outp=inp=p-=3; *p++='/'; *p++='*'; *p++='*';
413 } else p=refill(p);
414 } else break;
415 } else if (p[-1]=='\n') {
416 ++lineno[ifno]; if (!passcom) putc('\n',fout);
417 } else if (eob(--p)) {
418 if (!passcom) {inp=p; p=refill(p);}
419 else if ((p-inp)>=BUFSIZ) {/* split long comment */
420 inp=p; p=refill(p);
421 cputc('*',fout); cputc('/',fout);
422 outp=inp=p-=2; *p++='/'; *p++='*';
423 } else p=refill(p);
424 } else ++p; /* ignore null byte */
425 }
426 endcom:
427 incomment--;
428 if (!passcom) {outp=inp=p; --flslvl; goto again;}
429 break;
430 }
431 if (eob(--p)) p=refill(p);
432 else break;
433 } break;
434 # if gcos
435 case '`':
436 # endif
437 case '"': case '\'': {
438 quoc=p[-1];
439 for (;;) {
440 while (!isquo(*p++));
441 if (p[-1]==quoc) break;
442 if (p[-1]=='\n') {--p; break;} /* bare \n terminates quotation */
443 if (p[-1]=='\\') for (;;) {
444 if (*p++=='\n') {++lineno[ifno]; break;} /* escaped \n ignored */
445 if (eob(--p)) p=refill(p);
446 else {++p; break;}
447 } else if (eob(--p)) p=refill(p);
448 else ++p; /* it was a different quote character */
449 }
450 } break;
451 case '\n': {
452 ++lineno[ifno]; if (isslo) {state=LF; return(p);}
453 prevlf:
454 state=BEG;
455 for (;;) {
456 if (*p++=='#') return(p);
457 if (eob(inp= --p)) p=refill(p);
458 else goto again;
459 }
460 } break;
461 case '0': case '1': case '2': case '3': case '4':
462 case '5': case '6': case '7': case '8': case '9':
463 for (;;) {
464 while (isnum(*p++));
465 if (eob(--p)) p=refill(p);
466 else break;
467 } break;
468 case 'A': case 'B': case 'C': case 'D': case 'E':
469 case 'F': case 'G': case 'H': case 'I': case 'J':
470 case 'K': case 'L': case 'M': case 'N': case 'O':
471 case 'P': case 'Q': case 'R': case 'S': case 'T':
472 case 'U': case 'V': case 'W': case 'X': case 'Y':
473 case 'Z': case '_':
474 case 'a': case 'b': case 'c': case 'd': case 'e':
475 case 'f': case 'g': case 'h': case 'i': case 'j':
476 case 'k': case 'l': case 'm': case 'n': case 'o':
477 case 'p': case 'q': case 'r': case 's': case 't':
478 case 'u': case 'v': case 'w': case 'x': case 'y':
479 case 'z':
480 #if scw1
481 #define tmac1(c,bit) if (!xmac1(c,bit,&)) goto nomac
482 #define xmac1(c,bit,op) ((macbit+COFF)[c] op (bit))
483 #else
484 #define tmac1(c,bit)
485 #define xmac1(c,bit,op)
486 #endif
487
488 #if scw2
489 #define tmac2(c0,c1,cpos) if (!xmac2(c0,c1,cpos,&)) goto nomac
490 #define xmac2(c0,c1,cpos,op)\
491 ((macbit+COFF)[(t21+COFF)[c0]+(t22+COFF)[c1]] op (t23+COFF+cpos)[c0])
492 #else
493 #define tmac2(c0,c1,cpos)
494 #define xmac2(c0,c1,cpos,op)
495 #endif
496
497 if (flslvl) goto nomac;
498 for (;;) {
499 c= p[-1]; tmac1(c,b0);
500 i= *p++; if (!isid(i)) goto endid; tmac1(i,b1); tmac2(c,i,0);
501 c= *p++; if (!isid(c)) goto endid; tmac1(c,b2); tmac2(i,c,1);
502 i= *p++; if (!isid(i)) goto endid; tmac1(i,b3); tmac2(c,i,2);
503 c= *p++; if (!isid(c)) goto endid; tmac1(c,b4); tmac2(i,c,3);
504 i= *p++; if (!isid(i)) goto endid; tmac1(i,b5); tmac2(c,i,4);
505 c= *p++; if (!isid(c)) goto endid; tmac1(c,b6); tmac2(i,c,5);
506 i= *p++; if (!isid(i)) goto endid; tmac1(i,b7); tmac2(c,i,6);
507 tmac2(i,0,7);
508 while (isid(*p++));
509 if (eob(--p)) {refill(p); p=inp+1; continue;}
510 goto lokid;
511 endid:
512 if (eob(--p)) {refill(p); p=inp+1; continue;}
513 tmac2(p[-1],0,-1+(p-inp));
514 lokid:
515 slookup(inp,p,0); if (newp) {p=newp; goto again;}
516 else break;
517 nomac:
518 while (isid(*p++));
519 if (eob(--p)) {p=refill(p); goto nomac;}
520 else break;
521 } break;
522 } /* end of switch */
523
524 if (isslo) return(p);
525 } /* end of infinite loop */
526 }
527
528 char *
skipbl(p)529 skipbl(p) register char *p; {/* get next non-blank token */
530 do {outp=inp=p; p=cotoken(p);} while ((toktyp+COFF)[*inp]==BLANK);
531 return(p);
532 }
533
534 char *
unfill(p)535 unfill(p) register char *p; {
536 /* take <= BUFSIZ chars from right end of buffer and put them on instack .
537 /* slide rest of buffer to the right, update pointers, return new p.
538 */
539 register char *np,*op; register int d;
540 if (mactop>=MAXFRE) {
541 pperror("%s: too much pushback",macnam);
542 p=inp=pend; dump(); /* begin flushing pushback */
543 while (mactop>inctop[ifno]) {p=refill(p); p=inp=pend; dump();}
544 }
545 if (fretop>0) np=bufstack[--fretop];
546 else {
547 np=malloc(BUFSIZ+1);
548 if (np==NULL) {pperror("no space"); exit(exfail);}
549 np[BUFSIZ]='\0';
550 }
551 instack[mactop]=np; op=pend-BUFSIZ; if (op<p) op=p;
552 for (;;) {while (*np++= *op++); if (eob(op)) break;} /* out with old */
553 endbuf[mactop++]=np; /* mark end of saved text */
554 np=pbuf+BUFSIZ; op=pend-BUFSIZ; pend=np; if (op<p) op=p;
555 while (outp<op) *--np= *--op; /* slide over new */
556 if (bob(np)) pperror("token too long");
557 d=np-outp; outp+=d; inp+=d; macdam+=d; return(p+d);
558 }
559
560 char *
doincl(p)561 doincl(p) register char *p; {
562 int filok,inctype;
563 register char *cp; char **dirp,*nfil; char filname[BUFSIZ];
564
565 p=skipbl(p); cp=filname;
566 if (*inp++=='<') {/* special <> syntax */
567 inctype=1;
568 ++flslvl; /* prevent macro expansion */
569 for (;;) {
570 outp=inp=p; p=cotoken(p);
571 if (*inp=='\n') {--p; *cp='\0'; break;}
572 if (*inp=='>') { *cp='\0'; break;}
573 # ifdef gimpel
574 if (*inp=='.' && !intss()) *inp='#';
575 # endif
576 while (inp<p) *cp++= *inp++;
577 }
578 --flslvl; /* reenable macro expansion */
579 } else if (inp[-1]=='"') {/* regular "" syntax */
580 inctype=0;
581 # ifdef gimpel
582 while (inp<p) {if (*inp=='.' && !intss()) *inp='#'; *cp++= *inp++;}
583 # else
584 while (inp<p) *cp++= *inp++;
585 # endif
586 if (*--cp=='"') *cp='\0';
587 } else {pperror("bad include syntax",0); inctype=2;}
588 /* flush current file to \n , then write \n */
589 ++flslvl; do {outp=inp=p; p=cotoken(p);} while (*inp!='\n'); --flslvl;
590 inp=p; dump(); if (inctype==2) return(p);
591 /* look for included file */
592 if (ifno+1 >=MAXINC) {
593 pperror("Unreasonable include nesting",0); return(p);
594 }
595 if((nfil=malloc(BUFSIZ))==NULL) {pperror("no space"); exit(exfail);}
596 filok=0;
597 for (dirp=dirs+inctype; *dirp; ++dirp) {
598 if (
599 # if gcos
600 strdex(filname, '/')
601 # else
602 filname[0]=='/'
603 # endif
604 || **dirp=='\0') strcpy(nfil,filname);
605 else {
606 strcpy(nfil,*dirp);
607 # if unix || gcos
608 strcat(nfil,"/");
609 # endif
610 #ifdef ibm
611 #ifndef gimpel
612 strcat(nfil,".");
613 #endif
614 #endif
615 strcat(nfil,filname);
616 }
617 if (0<(fins[ifno+1]=open(nfil,READ))) {
618 filok=1; fin=fins[++ifno]; break;
619 }
620 }
621 if(filok==0){pperror("Can't find include file %s",filname);free(nfil);}
622 else {
623 nfil=realloc(nfil,strlen(nfil)+1);
624 lineno[ifno]=1; fnames[ifno]=nfil;
625 dirnams[ifno]=dirs[0]=trmdir(copy(nfil));
626 sayline(START);
627 /* save current contents of buffer */
628 while (!eob(p)) p=unfill(p);
629 inctop[ifno]=mactop;
630 }
631 return(p);
632 }
633
equfrm(a,p1,p2)634 equfrm(a,p1,p2) register char *a,*p1,*p2; {
635 register char c; int flag;
636 c= *p2; *p2='\0';
637 flag=strcmp(a,p1); *p2=c; return(flag==SAME);
638 }
639
640 char *
dodef(p)641 dodef(p) char *p; {/* process '#define' */
642 register char *pin,*psav,*cf;
643 char **pf,**qf; int b,c,params; struct symtab *np;
644 char *oldval;
645 char *space, *newspace;
646 char *formal[MAXFRM]; /* formal[n] is name of nth formal */
647 char formtxt[BUFSIZ]; /* space for formal names */
648 int opt_passcom=passcom;
649
650 passcom=0; /* don't put comments in macro expansions */
651
652 ++flslvl; /* prevent macro expansion during 'define' */
653 p=skipbl(p); pin=inp;
654 if ((toktyp+COFF)[*pin]!=IDENT) {
655 ppwarn("illegal macro name"); while (*inp!='\n') p=skipbl(p);
656 passcom=opt_passcom; return(p);
657 }
658 np=slookup(pin,p,1);
659 if (oldval=np->value) free(lastcopy); /* was previously defined */
660 b=1; cf=pin;
661 while (cf<p) {/* update macbit */
662 c= *cf++; xmac1(c,b,|=); b=(b+b)&0xFF;
663 if (cf!=p) xmac2(c,*cf,-1+(cf-pin),|=);
664 else xmac2(c,0,-1+(cf-pin),|=);
665 }
666 params=0; outp=inp=p; p=cotoken(p); pin=inp;
667 if (*pin=='(') {/* with parameters; identify the formals */
668 cf=formtxt; pf=formal;
669 for (;;) {
670 p=skipbl(p); pin=inp;
671 if (*pin=='\n') {
672 --lineno[ifno]; --p; pperror("%s: missing )",np->name); break;
673 }
674 if (*pin==')') break;
675 if (*pin==',') continue;
676 if ((toktyp+COFF)[*pin]!=IDENT) {
677 c= *p; *p='\0'; pperror("bad formal: %s",pin); *p=c;
678 } else if (pf>= &formal[MAXFRM]) {
679 c= *p; *p='\0'; pperror("too many formals: %s",pin); *p=c;
680 } else {
681 *pf++=cf; while (pin<p) *cf++= *pin++; *cf++='\0'; ++params;
682 }
683 }
684 if (params==0) --params; /* #define foo() ... */
685 } else if (*pin=='\n') {--lineno[ifno]; --p;}
686 /* remember beginning of macro body, so that we can
687 /* warn if a redefinition is different from old value.
688 */
689 space=psav=malloc(BUFSIZ);
690 if (space==NULL) {
691 pperror("too much defining");
692 passcom=opt_passcom;
693 return(p);
694 }
695 *psav++ = '\0';
696 for (;;) {/* accumulate definition until linefeed */
697 outp=inp=p; p=cotoken(p); pin=inp;
698 if (*pin=='\\' && pin[1]=='\n') {putc('\n',fout); continue;} /* ignore escaped lf */
699 if (*pin=='\n') break;
700 if (params) {/* mark the appearance of formals in the definiton */
701 if ((toktyp+COFF)[*pin]==IDENT) {
702 for (qf=pf; --qf>=formal; ) {
703 if (equfrm(*qf,pin,p)) {
704 *psav++=qf-formal+1; *psav++=WARN; pin=p; break;
705 }
706 }
707 } else if (*pin=='"' || *pin=='\''
708 # if gcos
709 || *pin=='`'
710 # endif
711 ) {/* inside quotation marks, too */
712 char quoc= *pin;
713 for (*psav++= *pin++; pin<p && *pin!=quoc; ) {
714 while (pin<p && !isid(*pin)) *psav++= *pin++;
715 cf=pin; while (cf<p && isid(*cf)) ++cf;
716 for (qf=pf; --qf>=formal; ) {
717 if (equfrm(*qf,pin,cf)) {
718 *psav++=qf-formal+1; *psav++=WARN; pin=cf; break;
719 }
720 }
721 while (pin<cf) *psav++= *pin++;
722 }
723 }
724 }
725 while (pin<p) *psav++= *pin++;
726 }
727 *psav++=params; *psav++='\0';
728 if ((cf=oldval)!=NULL) {/* redefinition */
729 --cf; /* skip no. of params, which may be zero */
730 while (*--cf); /* go back to the beginning */
731 if (0!=strcmp(++cf,space+1)) {/* redefinition different from old */
732 --lineno[ifno]; ppwarn("%s redefined",np->name); ++lineno[ifno];
733 np->value=psav-1;
734 } else free(space); /* identical redef.; reclaim space */
735 } else np->value=psav-1;
736 --flslvl; inp=pin;
737 if (np->value == psav-1) {
738 newspace = realloc(space, psav-space);
739 if (newspace==NULL) {pperror("no space"); exit(exfail);}
740 /*
741 * Adjust pointer in case this moved.
742 */
743 np->value += newspace-space;
744 }
745 passcom=opt_passcom;
746 return(p);
747 }
748
749 #define fasscan() ptrtab=fastab+COFF
750 #define sloscan() ptrtab=slotab+COFF
751
752 char *
control(p)753 control(p) register char *p; {/* find and handle preprocessor control lines */
754 register struct symtab *np;
755 for (;;) {
756 fasscan(); p=cotoken(p); if (*inp=='\n') ++inp; dump();
757 sloscan(); p=skipbl(p);
758 *--inp=SALT; outp=inp; ++flslvl; np=slookup(inp,p,0); --flslvl;
759 if (np==defloc) {/* define */
760 if (flslvl==0) {p=dodef(p); continue;}
761 } else if (np==incloc) {/* include */
762 if (flslvl==0) {p=doincl(p); continue;}
763 } else if (np==ifnloc) {/* ifndef */
764 ++flslvl; p=skipbl(p); np=slookup(inp,p,0); --flslvl;
765 if (flslvl==0 && np->value==0) ++trulvl;
766 else ++flslvl;
767 } else if (np==ifdloc) {/* ifdef */
768 ++flslvl; p=skipbl(p); np=slookup(inp,p,0); --flslvl;
769 if (flslvl==0 && np->value!=0) ++trulvl;
770 else ++flslvl;
771 } else if (np==eifloc) {/* endif */
772 if (flslvl) {if (--flslvl==0) sayline(CONT);}
773 else if (trulvl) --trulvl;
774 else pperror("If-less endif",0);
775 } else if (np==elsloc) {/* else */
776 if (flslvl) {
777 if (--flslvl!=0) ++flslvl;
778 else {++trulvl; sayline(CONT);}
779 }
780 else if (trulvl) {++flslvl; --trulvl;}
781 else pperror("If-less else",0);
782 } else if (np==udfloc) {/* undefine */
783 if (flslvl==0) {
784 ++flslvl; p=skipbl(p); slookup(inp,p,DROP); --flslvl;
785 }
786 } else if (np==ifloc) {/* if */
787 #if tgp
788 pperror(" IF not implemented, true assumed", 0);
789 if (flslvl==0) ++trulvl; else ++flslvl;
790 #else
791 newp=p;
792 if (flslvl==0 && yyparse()) ++trulvl; else ++flslvl;
793 p=newp;
794 #endif
795 } else if (np==lneloc) {/* line */
796 if (flslvl==0 && pflag==0) {
797 char *savestring();
798 char filename[BUFSIZ], *cp = filename;
799 outp=inp=p; *--outp='#';
800 /* Find the line number.. */
801 do {
802 p = cotoken(p);
803 } while (!isnum(*inp) && *inp != '\n');
804 if (isnum(*inp))
805 lineno[ifno] = atoi(inp)-1;
806 /* Skip over the blank token */
807 inp = p;
808 if (*inp != '\n') {
809 p = cotoken(p); inp = p;
810 }
811 /* Add a quote if missing.. */
812 if (*inp != '\n') {
813 p = cotoken(p);
814 /* Add a quote if missing.. */
815 if (*inp == '"')
816 inp++;
817 else {
818 dump();
819 *--outp = '"';
820 }
821 while (*inp != '\n') {
822 while (inp < p && *inp != '"' &&
823 cp < filename+sizeof(filename))
824 *cp++ = *inp++;
825 if (*inp == '"')
826 break;
827 inp = p; p = cotoken(p);
828 }
829 fnames[ifno] = savestring(filename, cp);
830 /* Add a quote if missing.. */
831 if (*inp != '"') {
832 dump();
833 *--outp = '"';
834 }
835 }
836 while (*inp != '\n')
837 p = cotoken(p);
838 continue;
839 }
840 } else if (np==identloc) {/* ident (for Sys 5r3 compat) */
841 while(*inp!='\n') p=cotoken(p);
842 } else if (*++inp=='\n') outp=inp; /* allows blank line after # */
843 else pperror("undefined control",0);
844 /* flush to lf */
845 ++flslvl; while (*inp!='\n') {outp=inp=p; p=cotoken(p);} --flslvl;
846 }
847 }
848
849 char *
savestring(start,finish)850 savestring(start, finish)
851 register char *start, *finish;
852 {
853 char *retbuf;
854 register char *cp;
855
856 retbuf = (char *) calloc(finish - start + 1, sizeof (char));
857 cp = retbuf;
858 while (start < finish)
859 *cp++ = *start++;
860 *cp = 0;
861 return(retbuf);
862 }
863
864 struct symtab *
stsym(s)865 stsym(s) register char *s; {
866 char buf[BUFSIZ]; register char *p;
867
868 /* make definition look exactly like end of #define line */
869 /* copy to avoid running off end of world when param list is at end */
870 p=buf; while (*p++= *s++);
871 p=buf; while (isid(*p++)); /* skip first identifier */
872 if (*--p=='=') {*p++=' '; while (*p++);}
873 else {s=" 1"; while (*p++= *s++);}
874 pend=p; *--p='\n';
875 sloscan(); dodef(buf); return(lastsym);
876 }
877
878 struct symtab *
ppsym(s)879 ppsym(s) char *s; {/* kluge */
880 register struct symtab *sp;
881 register char *name;
882
883 cinit=SALT; sp=stsym(s); name = malloc(strlen(sp->name)+1+1);
884 name[0] = '#'; strcpy(name+1, sp->name); sp->name = name;
885 cinit=0; return(sp);
886 }
887
888 /* VARARGS1 */
pperror(s,x,y)889 pperror(s,x,y) char *s; {
890 if (fnames[ifno][0]) fprintf(stderr,
891 # if gcos
892 "*%c* \"%s\", line ", exfail >= 0 ? 'F' : 'W',
893 # else
894 "%s: ",
895 # endif
896 fnames[ifno]);
897 fprintf(stderr, "%d: ",lineno[ifno]);
898 fprintf(stderr, s, x, y);
899 fprintf(stderr,"\n");
900 ++exfail;
901 }
902
yyerror(s,a,b)903 yyerror(s,a,b) char *s; {
904 pperror(s,a,b);
905 }
906
ppwarn(s,x)907 ppwarn(s,x) char *s; {
908 int fail = exfail;
909 exfail = -1;
910 pperror(s,x);
911 exfail = fail;
912 }
913
914 struct symtab *
lookup(namep,enterf)915 lookup(namep, enterf)
916 char *namep;
917 {
918 register char *np, *snp;
919 register int c, i; int around;
920 register struct symtab *sp;
921
922 /* namep had better not be too long (currently, <=NCPS chars) */
923 np=namep; around=0; i=cinit;
924 while (c= *np++) i += i+c; c=i; /* c=i for register usage on pdp11 */
925 c %= symsiz; if (c<0) c += symsiz;
926 sp = &stab[c];
927 while (snp=sp->name) {
928 np = namep;
929 while (*snp++ == *np) if (*np++ == '\0') {
930 if (enterf==DROP) {sp->name[0]= DROP; sp->value=0;}
931 return(lastsym=sp);
932 }
933 if (--sp < &stab[0])
934 if (around) {pperror("too many defines", 0); exit(exfail);}
935 else {++around; sp = &stab[symsiz-1];}
936 }
937 if (enterf==1) sp->name=namep;
938 return(lastsym=sp);
939 }
940
941 struct symtab *
slookup(p1,p2,enterf)942 slookup(p1,p2,enterf) register char *p1,*p2; int enterf;{
943 register char *p3; char c2,c3; struct symtab *np;
944 c2= *p2; *p2='\0'; /* mark end of token */
945 if ((p2-p1)>NCPS) p3=p1+NCPS; else p3=p2;
946 c3= *p3; *p3='\0'; /* truncate to NCPS chars or less */
947 if (enterf==1) p1=copy(p1);
948 np=lookup(p1,enterf); *p3=c3; *p2=c2;
949 if (np->value!=0 && flslvl==0) newp=subst(p2,np);
950 else newp=0;
951 return(np);
952 }
953
954 char *
subst(p,sp)955 subst(p,sp) register char *p; struct symtab *sp; {
956 static char match[]="%s: argument mismatch";
957 register char *ca,*vp; int params;
958 char *actual[MAXFRM]; /* actual[n] is text of nth actual */
959 char actused[MAXFRM]; /* for newline processing in actuals */
960 char acttxt[BUFSIZ]; /* space for actuals */
961 int nlines = 0;
962
963 if (0==(vp=sp->value)) return(p);
964 if ((p-macforw)<=macdam) {
965 if (++maclvl>symsiz && !rflag) {
966 pperror("%s: macro recursion",sp->name); return(p);
967 }
968 } else maclvl=0; /* level decreased */
969 macforw=p; macdam=0; /* new target for decrease in level */
970 macnam=sp->name;
971 dump();
972 if (sp==ulnloc) {
973 vp=acttxt; *vp++='\0';
974 (void)sprintf(vp,"%d",lineno[ifno]); while (*vp++);
975 } else if (sp==uflloc) {
976 vp=acttxt; *vp++='\0';
977 (void)sprintf(vp,"\"%s\"",fnames[ifno]); while (*vp++);
978 }
979 if (0!=(params= *--vp&0xFF)) {/* definition calls for params */
980 register char **pa;
981 ca=acttxt; pa=actual;
982 if (params==0xFF) params=1; /* #define foo() ... */
983 sloscan(); ++flslvl; /* no expansion during search for actuals */
984 plvl= -1;
985 do p=skipbl(p); while (*inp=='\n'); /* skip \n too */
986 if (*inp=='(') {
987 maclin=lineno[ifno]; macfil=fnames[ifno];
988 for (plvl=1; plvl!=0; ) {
989 *ca++='\0';
990 for (;;) {
991 outp=inp=p; p=cotoken(p);
992 if (*inp=='(') ++plvl;
993 if (*inp==')' && --plvl==0) {--params; break;}
994 if (plvl==1 && *inp==',') {--params; break;}
995 while (inp<p) *ca++= *inp++;
996 if (ca> &acttxt[BUFSIZ])
997 pperror("%s: actuals too long",sp->name);
998 }
999 if (pa>= &actual[MAXFRM]) ppwarn(match,sp->name);
1000 else { actused[pa-actual]=0; *pa++=ca; }
1001 }
1002 nlines = lineno[ifno] - maclin;
1003 lineno[ifno] = maclin; /* don't count newlines here */
1004 }
1005 if (params!=0) ppwarn(match,sp->name);
1006 while (--params>=0) *pa++=""+1; /* null string for missing actuals */
1007 --flslvl; fasscan();
1008 }
1009 for (;;) {/* push definition onto front of input stack */
1010 while (!iswarn(*--vp)) {
1011 if (bob(p)) {outp=inp=p; p=unfill(p);}
1012 *--p= *vp;
1013 }
1014 if (*vp==warnc) {/* insert actual param */
1015 ca=actual[*--vp-1];
1016 while (*--ca) {
1017 if (bob(p)) {outp=inp=p; p=unfill(p);}
1018 /* Actuals with newlines confuse line numbering */
1019 if (*ca == '\n' && actused[*vp-1])
1020 if (*(ca-1) == '\\') ca--;
1021 else *--p = ' ';
1022 else { *--p= *ca; if (*ca == '\n') nlines--; }
1023 }
1024 actused[*vp-1] = 1;
1025 } else {
1026 if (nlines > 0 )
1027 while (nlines-- > 0)
1028 *--p = '\n';
1029 break;
1030 }
1031 }
1032 outp=inp=p;
1033 return(p);
1034 }
1035
1036
1037
1038
1039 char *
trmdir(s)1040 trmdir(s) register char *s; {
1041 register char *p = s;
1042 while (*p++); --p; while (p>s && *--p!='/');
1043 # if unix
1044 if (p==s) *p++='.';
1045 # endif
1046 *p='\0';
1047 return(s);
1048 }
1049
1050 STATIC char *
copy(s)1051 copy(s) register char *s; {
1052 register char *old;
1053
1054 old = malloc(strlen(s)+1);
1055 if (old==NULL) {pperror("no space"); exit(exfail);}
1056 strcpy(old, s);
1057 return(lastcopy=old);
1058 }
1059
1060 char *
strdex(s,c)1061 strdex(s,c) char *s,c; {
1062 while (*s) if (*s++==c) return(--s);
1063 return(0);
1064 }
1065
yywrap()1066 yywrap(){ return(1); }
1067
main(argc,argv)1068 main(argc,argv)
1069 char *argv[];
1070 {
1071 register int i,c;
1072 register char *p;
1073 char *tf,**cp2;
1074
1075 # if gcos
1076 if (setjmp(env)) return (exfail);
1077 # endif
1078 p="_$ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
1079 i=0;
1080 while (c= *p++) {
1081 (fastab+COFF)[c] |= IB|NB|SB; (toktyp+COFF)[c]=IDENT;
1082 #if scw2
1083 /* 53 == 63-10; digits rarely appear in identifiers,
1084 /* and can never be the first char of an identifier.
1085 /* 11 == 53*53/sizeof(macbit) .
1086 */
1087 ++i; (t21+COFF)[c]=(53*i)/11; (t22+COFF)[c]=i%11;
1088 #endif
1089 }
1090 p="0123456789.";
1091 while (c= *p++) {(fastab+COFF)[c] |= NB|SB; (toktyp+COFF)[c]=NUMBR;}
1092 # if gcos
1093 p="\n\"'`/\\";
1094 # else
1095 p="\n\"'/\\";
1096 # endif
1097 while (c= *p++) (fastab+COFF)[c] |= SB;
1098 # if gcos
1099 p="\n\"'`\\";
1100 # else
1101 p="\n\"'\\";
1102 # endif
1103 while (c= *p++) (fastab+COFF)[c] |= QB;
1104 p="*\n"; while (c= *p++) (fastab+COFF)[c] |= CB;
1105 (fastab+COFF)[warnc] |= WB;
1106 (fastab+COFF)['\0'] |= CB|QB|SB|WB;
1107 for (i=ALFSIZ; --i>=0; ) slotab[i]=fastab[i]|SB;
1108 p=" \t\013\f\r"; /* note no \n; \v not legal for vertical tab? */
1109 while (c= *p++) (toktyp+COFF)[c]=BLANK;
1110 #if scw2
1111 for ((t23+COFF)[i=ALFSIZ+7-COFF]=1; --i>=-COFF; )
1112 if (((t23+COFF)[i]=(t23+COFF+1)[i]<<1)==0) (t23+COFF)[i]=1;
1113 #endif
1114
1115 # if unix
1116 fnames[ifno=0] = ""; dirnams[0]=dirs[0]=".";
1117 # endif
1118 # if ibm
1119 fnames[ifno=0] = "";
1120 # endif
1121 # if gcos
1122 if (inquire(stdin, _TTY)) freopen("*src", "rt", stdin);
1123 # endif
1124 # if gimpel || gcos
1125 fnames[ifno=0] = (char *)inquire(stdin, _FILENAME);
1126 dirnams[0] = dirs[0] = trmdir(copy(fnames[0]));
1127 # endif
1128 for(i=1; i<argc; i++)
1129 {
1130 switch(argv[i][0])
1131 {
1132 case '-':
1133 # if gcos
1134 switch(toupper(argv[i][1])) { /* case-independent on GCOS */
1135 # else
1136 switch(argv[i][1]) {
1137 # endif
1138 case 'M': mflag++;
1139 case 'P': pflag++;
1140 case 'E': continue;
1141 case 'R': ++rflag; continue;
1142 case 'C': passcom++; continue;
1143 case 'D':
1144 if (predef>prespc+NPREDEF) {
1145 pperror("too many -D options, ignoring %s",argv[i]);
1146 continue;
1147 }
1148 /* ignore plain "-D" (no argument) */
1149 if (*(argv[i]+2)) *predef++ = argv[i]+2;
1150 continue;
1151 case 'U':
1152 if (prund>punspc+NPREDEF) {
1153 pperror("too many -U options, ignoring %s",argv[i]);
1154 continue;
1155 }
1156 *prund++ = argv[i]+2;
1157 continue;
1158 case 'I':
1159 if (nd>8) pperror("excessive -I file (%s) ignored",argv[i]);
1160 else dirs[nd++] = argv[i]+2;
1161 continue;
1162 case '\0': continue;
1163 default:
1164 pperror("unknown flag %s", argv[i]);
1165 continue;
1166 }
1167 default:
1168 if (fin==FIRSTOPEN) {
1169 if (0>(fin=open(argv[i], READ))) {
1170 pperror("No source file %s",argv[i]); exit(8);
1171 }
1172 fnames[ifno]=copy(argv[i]);
1173 infile=copy(argv[i]);
1174 dirs[0]=dirnams[ifno]=trmdir(argv[i]);
1175 # ifndef gcos
1176 /* too dangerous to have file name in same syntactic position
1177 be input or output file depending on file redirections,
1178 so force output to stdout, willy-nilly
1179 [i don't see what the problem is. jfr]
1180 */
1181 } else if (fout==stdout) {
1182 if (NULL==(fout=fopen(argv[i], "w"))) {
1183 pperror("Can't create %s", argv[i]); exit(8);
1184 } else fclose(stdout);
1185 # endif
1186 } else pperror("extraneous name %s", argv[i]);
1187 }
1188 }
1189 if (fin == FIRSTOPEN)
1190 fin = STDIN;
1191
1192 if (mflag) {
1193 if (infile==(char *)0) {
1194 fprintf(stderr,
1195 "no input file specified with -M flag\n");
1196 exit(8);
1197 }
1198 tf=(char *)rindex(infile, '.');
1199 if (tf==0) {
1200 fprintf(stderr, "missing component name on %s\n",
1201 infile);
1202 exit(8);
1203 }
1204 tf[1]='o';
1205 tf=(char *)rindex(infile, '/');
1206 if (tf!=(char *)0)
1207 infile = tf + 1;
1208 mout=fout;
1209 if (NULL==(fout=fopen(_PATH_DEVNULL, "w"))) {
1210 fprintf(stderr, "cpp: can't open %s\n", _PATH_DEVNULL);
1211 exit(8);
1212 }
1213 }
1214 fins[ifno]=fin;
1215 exfail = 0;
1216 /* after user -I files here are the standard include libraries */
1217 # if unix
1218 dirs[nd++] = _PATH_INCLUDES;
1219 # endif
1220 # if gcos
1221 dirs[nd++] = "cc/include";
1222 # endif
1223 # if ibm
1224 # ifndef gimpel
1225 dirs[nd++] = "BTL$CLIB";
1226 # endif
1227 # endif
1228 # ifdef gimpel
1229 dirs[nd++] = intss() ? "SYS3.C." : "" ;
1230 # endif
1231 /* dirs[nd++] = "/compool"; */
1232 dirs[nd++] = 0;
1233 defloc=ppsym("define");
1234 udfloc=ppsym("undef");
1235 incloc=ppsym("include");
1236 elsloc=ppsym("else");
1237 eifloc=ppsym("endif");
1238 ifdloc=ppsym("ifdef");
1239 ifnloc=ppsym("ifndef");
1240 ifloc=ppsym("if");
1241 lneloc=ppsym("line");
1242 identloc=ppsym("ident"); /* Sys 5r3 compatibility */
1243 for (i=sizeof(macbit)/sizeof(macbit[0]); --i>=0; ) macbit[i]=0;
1244 # if unix
1245 ysysloc=stsym("unix");
1246 # endif
1247 ysysloc=stsym(MACHINE);
1248 ulnloc=stsym ("__LINE__");
1249 uflloc=stsym ("__FILE__");
1250
1251 tf=fnames[ifno]; fnames[ifno]="command line"; lineno[ifno]=1;
1252 cp2=prespc;
1253 while (cp2<predef) stsym(*cp2++);
1254 cp2=punspc;
1255 while (cp2<prund) {
1256 if (p=strdex(*cp2, '=')) *p++='\0';
1257 lookup(*cp2++, DROP);
1258 }
1259 fnames[ifno]=tf;
1260 pbeg=buffer+NCPS; pbuf=pbeg+BUFSIZ; pend=pbuf+BUFSIZ;
1261
1262 trulvl = 0; flslvl = 0;
1263 lineno[0] = 1; sayline(START);
1264 outp=inp=pend;
1265 control(pend);
1266 return (exfail);
1267 }
1268