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1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
7 | #ifndef lint | |
8 | static char sccsid[] = "@(#)lex.c 5.1 (Berkeley) 6/7/85"; | |
9 | #endif not lint | |
10 | ||
11 | /* | |
12 | * lex.c | |
13 | * | |
14 | * Lexical scanner routines for the f77 compiler, pass 1, 4.2 BSD. | |
15 | * | |
16 | * University of Utah CS Dept modification history: | |
17 | * | |
18 | * $Log: lex.c,v $ | |
19 | * Revision 1.2 84/10/27 02:20:09 donn | |
20 | * Fixed bug where the input file and the name field of the include file | |
21 | * structure shared -- when the input file name was freed, the include file | |
22 | * name got stomped on, leading to peculiar error messages. | |
23 | * | |
24 | */ | |
25 | ||
26 | #include "defs.h" | |
27 | #include "tokdefs.h" | |
dc0e9d50 | 28 | #include "pathnames.h" |
ec38a539 KB |
29 | |
30 | # define BLANK ' ' | |
31 | # define MYQUOTE (2) | |
32 | # define SEOF 0 | |
33 | ||
34 | /* card types */ | |
35 | ||
36 | # define STEOF 1 | |
37 | # define STINITIAL 2 | |
38 | # define STCONTINUE 3 | |
39 | ||
40 | /* lex states */ | |
41 | ||
42 | #define NEWSTMT 1 | |
43 | #define FIRSTTOKEN 2 | |
44 | #define OTHERTOKEN 3 | |
45 | #define RETEOS 4 | |
46 | ||
47 | ||
48 | LOCAL int stkey; | |
49 | LOCAL int lastend = 1; | |
50 | ftnint yystno; | |
51 | flag intonly; | |
52 | LOCAL long int stno; | |
53 | LOCAL long int nxtstno; | |
54 | LOCAL int parlev; | |
55 | LOCAL int expcom; | |
56 | LOCAL int expeql; | |
57 | LOCAL char *nextch; | |
58 | LOCAL char *lastch; | |
59 | LOCAL char *nextcd = NULL; | |
60 | LOCAL char *endcd; | |
61 | LOCAL int prevlin; | |
62 | LOCAL int thislin; | |
63 | LOCAL int code; | |
64 | LOCAL int lexstate = NEWSTMT; | |
65 | LOCAL char s[1390]; | |
66 | LOCAL char *send = s+20*66; | |
67 | LOCAL int nincl = 0; | |
68 | LOCAL char *newname = NULL; | |
69 | ||
70 | struct Inclfile | |
71 | { | |
72 | struct Inclfile *inclnext; | |
73 | FILEP inclfp; | |
74 | char *inclname; | |
75 | int incllno; | |
76 | char *incllinp; | |
77 | int incllen; | |
78 | int inclcode; | |
79 | ftnint inclstno; | |
80 | } ; | |
81 | ||
82 | LOCAL struct Inclfile *inclp = NULL; | |
83 | LOCAL struct Keylist { char *keyname; int keyval; char notinf66; } ; | |
84 | LOCAL struct Punctlist { char punchar; int punval; }; | |
85 | LOCAL struct Fmtlist { char fmtchar; int fmtval; }; | |
86 | LOCAL struct Dotlist { char *dotname; int dotval; }; | |
87 | LOCAL struct Keylist *keystart[26], *keyend[26]; | |
88 | ||
89 | ||
90 | ||
91 | ||
92 | inilex(name) | |
93 | char *name; | |
94 | { | |
95 | nincl = 0; | |
96 | inclp = NULL; | |
97 | doinclude(name); | |
98 | lexstate = NEWSTMT; | |
99 | return(NO); | |
100 | } | |
101 | ||
102 | ||
103 | ||
104 | /* throw away the rest of the current line */ | |
105 | flline() | |
106 | { | |
107 | lexstate = RETEOS; | |
108 | } | |
109 | ||
110 | ||
111 | ||
112 | char *lexline(n) | |
113 | int *n; | |
114 | { | |
115 | *n = (lastch - nextch) + 1; | |
116 | return(nextch); | |
117 | } | |
118 | ||
119 | ||
120 | ||
121 | ||
122 | ||
123 | doinclude(name) | |
124 | char *name; | |
125 | { | |
126 | FILEP fp; | |
127 | struct Inclfile *t; | |
128 | char temp[100]; | |
129 | register char *lastslash, *s; | |
130 | ||
131 | if(inclp) | |
132 | { | |
133 | inclp->incllno = thislin; | |
134 | inclp->inclcode = code; | |
135 | inclp->inclstno = nxtstno; | |
136 | if(nextcd) | |
137 | inclp->incllinp = copyn(inclp->incllen = endcd-nextcd , nextcd); | |
138 | else | |
139 | inclp->incllinp = 0; | |
140 | } | |
141 | nextcd = NULL; | |
142 | ||
143 | if(++nincl >= MAXINCLUDES) | |
144 | fatal("includes nested too deep"); | |
145 | if(name[0] == '\0') | |
146 | fp = stdin; | |
147 | else if(name[0]=='/' || inclp==NULL) | |
148 | fp = fopen(name, "r"); | |
149 | else { | |
150 | lastslash = NULL; | |
151 | for(s = inclp->inclname ; *s ; ++s) | |
152 | if(*s == '/') | |
153 | lastslash = s; | |
154 | if(lastslash) | |
155 | { | |
156 | *lastslash = '\0'; | |
157 | sprintf(temp, "%s/%s", inclp->inclname, name); | |
158 | *lastslash = '/'; | |
159 | } | |
160 | else | |
161 | strcpy(temp, name); | |
162 | ||
163 | if( (fp = fopen(temp, "r")) == NULL ) | |
164 | { | |
dc0e9d50 | 165 | sprintf(temp, "%s/%s", _PATH_INCLUDES, name); |
ec38a539 KB |
166 | fp = fopen(temp, "r"); |
167 | } | |
168 | if(fp) | |
169 | name = copys(temp); | |
170 | } | |
171 | ||
172 | if( fp ) | |
173 | { | |
174 | t = inclp; | |
175 | inclp = ALLOC(Inclfile); | |
176 | inclp->inclnext = t; | |
177 | prevlin = thislin = 0; | |
178 | inclp->inclname = name; | |
179 | infname = copys(name); | |
180 | infile = inclp->inclfp = fp; | |
181 | } | |
182 | else | |
183 | { | |
184 | fprintf(diagfile, "Cannot open file %s", name); | |
185 | done(1); | |
186 | } | |
187 | } | |
188 | ||
189 | ||
190 | ||
191 | ||
192 | LOCAL popinclude() | |
193 | { | |
194 | struct Inclfile *t; | |
195 | register char *p; | |
196 | register int k; | |
197 | ||
198 | if(infile != stdin) | |
199 | clf(&infile); | |
200 | free(infname); | |
201 | ||
202 | --nincl; | |
203 | t = inclp->inclnext; | |
204 | free(inclp->inclname); | |
205 | free( (charptr) inclp); | |
206 | inclp = t; | |
207 | if(inclp == NULL) | |
208 | return(NO); | |
209 | ||
210 | infile = inclp->inclfp; | |
211 | infname = copys(inclp->inclname); | |
212 | prevlin = thislin = inclp->incllno; | |
213 | code = inclp->inclcode; | |
214 | stno = nxtstno = inclp->inclstno; | |
215 | if(inclp->incllinp) | |
216 | { | |
217 | endcd = nextcd = s; | |
218 | k = inclp->incllen; | |
219 | p = inclp->incllinp; | |
220 | while(--k >= 0) | |
221 | *endcd++ = *p++; | |
222 | free( (charptr) (inclp->incllinp) ); | |
223 | } | |
224 | else | |
225 | nextcd = NULL; | |
226 | return(YES); | |
227 | } | |
228 | ||
229 | ||
230 | ||
231 | ||
232 | yylex() | |
233 | { | |
234 | static int tokno; | |
235 | ||
236 | switch(lexstate) | |
237 | { | |
238 | case NEWSTMT : /* need a new statement */ | |
239 | if(getcds() == STEOF) | |
240 | return(SEOF); | |
241 | lastend = stkey == SEND; | |
242 | crunch(); | |
243 | tokno = 0; | |
244 | lexstate = FIRSTTOKEN; | |
245 | yystno = stno; | |
246 | stno = nxtstno; | |
247 | toklen = 0; | |
248 | return(SLABEL); | |
249 | ||
250 | first: | |
251 | case FIRSTTOKEN : /* first step on a statement */ | |
252 | analyz(); | |
253 | lexstate = OTHERTOKEN; | |
254 | tokno = 1; | |
255 | return(stkey); | |
256 | ||
257 | case OTHERTOKEN : /* return next token */ | |
258 | if(nextch > lastch) | |
259 | goto reteos; | |
260 | ++tokno; | |
261 | if( (stkey==SLOGIF || stkey==SELSEIF) && parlev==0 && tokno>3) | |
262 | goto first; | |
263 | ||
264 | if(stkey==SASSIGN && tokno==3 && nextch<lastch && | |
265 | nextch[0]=='t' && nextch[1]=='o') | |
266 | { | |
267 | nextch+=2; | |
268 | return(STO); | |
269 | } | |
270 | return(gettok()); | |
271 | ||
272 | reteos: | |
273 | case RETEOS: | |
274 | lexstate = NEWSTMT; | |
275 | return(SEOS); | |
276 | } | |
277 | fatali("impossible lexstate %d", lexstate); | |
278 | /* NOTREACHED */ | |
279 | } | |
280 | \f | |
281 | LOCAL getcds() | |
282 | { | |
283 | register char *p, *q; | |
284 | ||
285 | if (newname) | |
286 | { | |
287 | free(infname); | |
288 | infname = newname; | |
289 | newname = NULL; | |
290 | } | |
291 | ||
292 | top: | |
293 | if(nextcd == NULL) | |
294 | { | |
295 | code = getcd( nextcd = s ); | |
296 | stno = nxtstno; | |
297 | if (newname) | |
298 | { | |
299 | free(infname); | |
300 | infname = newname; | |
301 | newname = NULL; | |
302 | } | |
303 | prevlin = thislin; | |
304 | } | |
305 | if(code == STEOF) | |
306 | if( popinclude() ) | |
307 | goto top; | |
308 | else | |
309 | return(STEOF); | |
310 | ||
311 | if(code == STCONTINUE) | |
312 | { | |
313 | if (newname) | |
314 | { | |
315 | free(infname); | |
316 | infname = newname; | |
317 | newname = NULL; | |
318 | } | |
319 | lineno = thislin; | |
320 | err("illegal continuation card ignored"); | |
321 | nextcd = NULL; | |
322 | goto top; | |
323 | } | |
324 | ||
325 | if(nextcd > s) | |
326 | { | |
327 | q = nextcd; | |
328 | p = s; | |
329 | while(q < endcd) | |
330 | *p++ = *q++; | |
331 | endcd = p; | |
332 | } | |
333 | for(nextcd = endcd ; | |
334 | nextcd+66<=send && (code = getcd(nextcd))==STCONTINUE ; | |
335 | nextcd = endcd ) | |
336 | ; | |
337 | nextch = s; | |
338 | lastch = nextcd - 1; | |
339 | if(nextcd >= send) | |
340 | nextcd = NULL; | |
341 | lineno = prevlin; | |
342 | prevlin = thislin; | |
343 | return(STINITIAL); | |
344 | } | |
345 | \f | |
346 | LOCAL getcd(b) | |
347 | register char *b; | |
348 | { | |
349 | register int c; | |
350 | register char *p, *bend; | |
351 | int speclin; | |
352 | static char a[6]; | |
353 | static char *aend = a+6; | |
354 | int num; | |
355 | ||
356 | top: | |
357 | endcd = b; | |
358 | bend = b+66; | |
359 | speclin = NO; | |
360 | ||
361 | if( (c = getc(infile)) == '&') | |
362 | { | |
363 | a[0] = BLANK; | |
364 | a[5] = 'x'; | |
365 | speclin = YES; | |
366 | bend = send; | |
367 | } | |
368 | else if(c=='c' || c=='C' || c=='*') | |
369 | { | |
370 | while( (c = getc(infile)) != '\n') | |
371 | if(c == EOF) | |
372 | return(STEOF); | |
373 | ++thislin; | |
374 | goto top; | |
375 | } | |
376 | else if(c == '#') | |
377 | { | |
378 | c = getc(infile); | |
379 | while (c == BLANK || c == '\t') | |
380 | c = getc(infile); | |
381 | ||
382 | num = 0; | |
383 | while (isdigit(c)) | |
384 | { | |
385 | num = 10*num + c - '0'; | |
386 | c = getc(infile); | |
387 | } | |
388 | thislin = num - 1; | |
389 | ||
390 | while (c == BLANK || c == '\t') | |
391 | c = getc(infile); | |
392 | ||
393 | if (c == '"') | |
394 | { | |
395 | char fname[1024]; | |
396 | int len = 0; | |
397 | ||
398 | c = getc(infile); | |
399 | while (c != '"' && c != '\n') | |
400 | { | |
401 | fname[len++] = c; | |
402 | c = getc(infile); | |
403 | } | |
404 | fname[len++] = '\0'; | |
405 | ||
406 | if (newname) | |
407 | free(newname); | |
408 | newname = (char *) ckalloc(len); | |
409 | strcpy(newname, fname); | |
410 | } | |
411 | ||
412 | while (c != '\n') | |
413 | if (c == EOF) | |
414 | return (STEOF); | |
415 | else | |
416 | c = getc(infile); | |
417 | goto top; | |
418 | } | |
419 | ||
420 | else if(c != EOF) | |
421 | { | |
422 | /* a tab in columns 1-6 skips to column 7 */ | |
423 | ungetc(c, infile); | |
424 | for(p=a; p<aend && (c=getc(infile)) != '\n' && c!=EOF; ) | |
425 | if(c == '\t') | |
426 | { | |
427 | while(p < aend) | |
428 | *p++ = BLANK; | |
429 | speclin = YES; | |
430 | bend = send; | |
431 | } | |
432 | else | |
433 | *p++ = c; | |
434 | } | |
435 | if(c == EOF) | |
436 | return(STEOF); | |
437 | if(c == '\n') | |
438 | { | |
439 | while(p < aend) | |
440 | *p++ = BLANK; | |
441 | if( ! speclin ) | |
442 | while(endcd < bend) | |
443 | *endcd++ = BLANK; | |
444 | } | |
445 | else { /* read body of line */ | |
446 | while( endcd<bend && (c=getc(infile)) != '\n' && c!=EOF ) | |
447 | *endcd++ = c; | |
448 | if(c == EOF) | |
449 | return(STEOF); | |
450 | if(c != '\n') | |
451 | { | |
452 | while( (c=getc(infile)) != '\n') | |
453 | if(c == EOF) | |
454 | return(STEOF); | |
455 | } | |
456 | ||
457 | if( ! speclin ) | |
458 | while(endcd < bend) | |
459 | *endcd++ = BLANK; | |
460 | } | |
461 | ++thislin; | |
462 | if( !isspace(a[5]) && a[5]!='0') | |
463 | return(STCONTINUE); | |
464 | for(p=a; p<aend; ++p) | |
465 | if( !isspace(*p) ) goto initline; | |
466 | for(p = b ; p<endcd ; ++p) | |
467 | if( !isspace(*p) ) goto initline; | |
468 | goto top; | |
469 | ||
470 | initline: | |
471 | nxtstno = 0; | |
472 | for(p = a ; p<a+5 ; ++p) | |
473 | if( !isspace(*p) ) | |
474 | if(isdigit(*p)) | |
475 | nxtstno = 10*nxtstno + (*p - '0'); | |
476 | else { | |
477 | if (newname) | |
478 | { | |
479 | free(infname); | |
480 | infname = newname; | |
481 | newname = NULL; | |
482 | } | |
483 | lineno = thislin; | |
484 | err("nondigit in statement number field"); | |
485 | nxtstno = 0; | |
486 | break; | |
487 | } | |
488 | return(STINITIAL); | |
489 | } | |
490 | \f | |
491 | LOCAL crunch() | |
492 | { | |
493 | register char *i, *j, *j0, *j1, *prvstr; | |
494 | int ten, nh, quote; | |
495 | ||
496 | /* i is the next input character to be looked at | |
497 | j is the next output character */ | |
498 | parlev = 0; | |
499 | expcom = 0; /* exposed ','s */ | |
500 | expeql = 0; /* exposed equal signs */ | |
501 | j = s; | |
502 | prvstr = s; | |
503 | for(i=s ; i<=lastch ; ++i) | |
504 | { | |
505 | if(isspace(*i) ) | |
506 | continue; | |
507 | if(*i=='\'' || *i=='"') | |
508 | { | |
509 | quote = *i; | |
510 | *j = MYQUOTE; /* special marker */ | |
511 | for(;;) | |
512 | { | |
513 | if(++i > lastch) | |
514 | { | |
515 | err("unbalanced quotes; closing quote supplied"); | |
516 | break; | |
517 | } | |
518 | if(*i == quote) | |
519 | if(i<lastch && i[1]==quote) ++i; | |
520 | else break; | |
521 | else if(*i=='\\' && i<lastch) | |
522 | switch(*++i) | |
523 | { | |
524 | case 't': | |
525 | *i = '\t'; break; | |
526 | case 'b': | |
527 | *i = '\b'; break; | |
528 | case 'n': | |
529 | *i = '\n'; break; | |
530 | case 'f': | |
531 | *i = '\f'; break; | |
532 | case 'v': | |
533 | *i = '\v'; break; | |
534 | case '0': | |
535 | *i = '\0'; break; | |
536 | default: | |
537 | break; | |
538 | } | |
539 | *++j = *i; | |
540 | } | |
541 | j[1] = MYQUOTE; | |
542 | j += 2; | |
543 | prvstr = j; | |
544 | } | |
545 | else if( (*i=='h' || *i=='H') && j>prvstr) /* test for Hollerith strings */ | |
546 | { | |
547 | if( ! isdigit(j[-1])) goto copychar; | |
548 | nh = j[-1] - '0'; | |
549 | ten = 10; | |
550 | j1 = prvstr - 1; | |
551 | if (j1<j-5) j1=j-5; | |
552 | for(j0=j-2 ; j0>j1; -- j0) | |
553 | { | |
554 | if( ! isdigit(*j0 ) ) break; | |
555 | nh += ten * (*j0-'0'); | |
556 | ten*=10; | |
557 | } | |
558 | if(j0 <= j1) goto copychar; | |
559 | /* a hollerith must be preceded by a punctuation mark. | |
560 | '*' is possible only as repetition factor in a data statement | |
561 | not, in particular, in character*2h | |
562 | */ | |
563 | ||
564 | if( !(*j0=='*'&&s[0]=='d') && *j0!='/' && *j0!='(' && | |
565 | *j0!=',' && *j0!='=' && *j0!='.') | |
566 | goto copychar; | |
567 | if(i+nh > lastch) | |
568 | { | |
569 | erri("%dH too big", nh); | |
570 | nh = lastch - i; | |
571 | } | |
572 | j0[1] = MYQUOTE; /* special marker */ | |
573 | j = j0 + 1; | |
574 | while(nh-- > 0) | |
575 | { | |
576 | if(*++i == '\\') | |
577 | switch(*++i) | |
578 | { | |
579 | case 't': | |
580 | *i = '\t'; break; | |
581 | case 'b': | |
582 | *i = '\b'; break; | |
583 | case 'n': | |
584 | *i = '\n'; break; | |
585 | case 'f': | |
586 | *i = '\f'; break; | |
587 | case '0': | |
588 | *i = '\0'; break; | |
589 | default: | |
590 | break; | |
591 | } | |
592 | *++j = *i; | |
593 | } | |
594 | j[1] = MYQUOTE; | |
595 | j+=2; | |
596 | prvstr = j; | |
597 | } | |
598 | else { | |
599 | if(*i == '(') ++parlev; | |
600 | else if(*i == ')') --parlev; | |
601 | else if(parlev == 0) | |
602 | if(*i == '=') expeql = 1; | |
603 | else if(*i == ',') expcom = 1; | |
604 | copychar: /*not a string or space -- copy, shifting case if necessary */ | |
605 | if(shiftcase && isupper(*i)) | |
606 | *j++ = tolower(*i); | |
607 | else *j++ = *i; | |
608 | } | |
609 | } | |
610 | lastch = j - 1; | |
611 | nextch = s; | |
612 | } | |
613 | \f | |
614 | LOCAL analyz() | |
615 | { | |
616 | register char *i; | |
617 | ||
618 | if(parlev != 0) | |
619 | { | |
620 | err("unbalanced parentheses, statement skipped"); | |
621 | stkey = SUNKNOWN; | |
622 | return; | |
623 | } | |
624 | if(nextch+2<=lastch && nextch[0]=='i' && nextch[1]=='f' && nextch[2]=='(') | |
625 | { | |
626 | /* assignment or if statement -- look at character after balancing paren */ | |
627 | parlev = 1; | |
628 | for(i=nextch+3 ; i<=lastch; ++i) | |
629 | if(*i == (MYQUOTE)) | |
630 | { | |
631 | while(*++i != MYQUOTE) | |
632 | ; | |
633 | } | |
634 | else if(*i == '(') | |
635 | ++parlev; | |
636 | else if(*i == ')') | |
637 | { | |
638 | if(--parlev == 0) | |
639 | break; | |
640 | } | |
641 | if(i >= lastch) | |
642 | stkey = SLOGIF; | |
643 | else if(i[1] == '=') | |
644 | stkey = SLET; | |
645 | else if( isdigit(i[1]) ) | |
646 | stkey = SARITHIF; | |
647 | else stkey = SLOGIF; | |
648 | if(stkey != SLET) | |
649 | nextch += 2; | |
650 | } | |
651 | else if(expeql) /* may be an assignment */ | |
652 | { | |
653 | if(expcom && nextch<lastch && | |
654 | nextch[0]=='d' && nextch[1]=='o') | |
655 | { | |
656 | stkey = SDO; | |
657 | nextch += 2; | |
658 | } | |
659 | else stkey = SLET; | |
660 | } | |
661 | /* otherwise search for keyword */ | |
662 | else { | |
663 | stkey = getkwd(); | |
664 | if(stkey==SGOTO && lastch>=nextch) | |
665 | if(nextch[0]=='(') | |
666 | stkey = SCOMPGOTO; | |
667 | else if(isalpha(nextch[0])) | |
668 | stkey = SASGOTO; | |
669 | } | |
670 | parlev = 0; | |
671 | } | |
672 | ||
673 | ||
674 | ||
675 | LOCAL getkwd() | |
676 | { | |
677 | register char *i, *j; | |
678 | register struct Keylist *pk, *pend; | |
679 | int k; | |
680 | ||
681 | if(! isalpha(nextch[0]) ) | |
682 | return(SUNKNOWN); | |
683 | k = nextch[0] - 'a'; | |
684 | if(pk = keystart[k]) | |
685 | for(pend = keyend[k] ; pk<=pend ; ++pk ) | |
686 | { | |
687 | i = pk->keyname; | |
688 | j = nextch; | |
689 | while(*++i==*++j && *i!='\0') | |
690 | ; | |
691 | if(*i=='\0' && j<=lastch+1) | |
692 | { | |
693 | nextch = j; | |
694 | if(no66flag && pk->notinf66) | |
695 | errstr("Not a Fortran 66 keyword: %s", | |
696 | pk->keyname); | |
697 | return(pk->keyval); | |
698 | } | |
699 | } | |
700 | return(SUNKNOWN); | |
701 | } | |
702 | ||
703 | ||
704 | ||
705 | initkey() | |
706 | { | |
707 | extern struct Keylist keys[]; | |
708 | register struct Keylist *p; | |
709 | register int i,j; | |
710 | ||
711 | for(i = 0 ; i<26 ; ++i) | |
712 | keystart[i] = NULL; | |
713 | ||
714 | for(p = keys ; p->keyname ; ++p) | |
715 | { | |
716 | j = p->keyname[0] - 'a'; | |
717 | if(keystart[j] == NULL) | |
718 | keystart[j] = p; | |
719 | keyend[j] = p; | |
720 | } | |
721 | } | |
722 | \f | |
723 | LOCAL gettok() | |
724 | { | |
725 | int havdot, havexp, havdbl; | |
726 | int radix, val; | |
727 | extern struct Punctlist puncts[]; | |
728 | struct Punctlist *pp; | |
729 | extern struct Fmtlist fmts[]; | |
730 | extern struct Dotlist dots[]; | |
731 | struct Dotlist *pd; | |
732 | ||
733 | char *i, *j, *n1, *p; | |
734 | ||
735 | if(*nextch == (MYQUOTE)) | |
736 | { | |
737 | ++nextch; | |
738 | p = token; | |
739 | while(*nextch != MYQUOTE) | |
740 | *p++ = *nextch++; | |
741 | ++nextch; | |
742 | toklen = p - token; | |
743 | *p = '\0'; | |
744 | return (SHOLLERITH); | |
745 | } | |
746 | /* | |
747 | if(stkey == SFORMAT) | |
748 | { | |
749 | for(pf = fmts; pf->fmtchar; ++pf) | |
750 | { | |
751 | if(*nextch == pf->fmtchar) | |
752 | { | |
753 | ++nextch; | |
754 | if(pf->fmtval == SLPAR) | |
755 | ++parlev; | |
756 | else if(pf->fmtval == SRPAR) | |
757 | --parlev; | |
758 | return(pf->fmtval); | |
759 | } | |
760 | } | |
761 | if( isdigit(*nextch) ) | |
762 | { | |
763 | p = token; | |
764 | *p++ = *nextch++; | |
765 | while(nextch<=lastch && isdigit(*nextch) ) | |
766 | *p++ = *nextch++; | |
767 | toklen = p - token; | |
768 | *p = '\0'; | |
769 | if(nextch<=lastch && *nextch=='p') | |
770 | { | |
771 | ++nextch; | |
772 | return(SSCALE); | |
773 | } | |
774 | else return(SICON); | |
775 | } | |
776 | if( isalpha(*nextch) ) | |
777 | { | |
778 | p = token; | |
779 | *p++ = *nextch++; | |
780 | while(nextch<=lastch && | |
781 | (*nextch=='.' || isdigit(*nextch) || isalpha(*nextch) )) | |
782 | *p++ = *nextch++; | |
783 | toklen = p - token; | |
784 | *p = '\0'; | |
785 | return(SFIELD); | |
786 | } | |
787 | goto badchar; | |
788 | } | |
789 | /* Not a format statement */ | |
790 | ||
791 | if(needkwd) | |
792 | { | |
793 | needkwd = 0; | |
794 | return( getkwd() ); | |
795 | } | |
796 | ||
797 | for(pp=puncts; pp->punchar; ++pp) | |
798 | if(*nextch == pp->punchar) | |
799 | { | |
800 | if( (*nextch=='*' || *nextch=='/') && | |
801 | nextch<lastch && nextch[1]==nextch[0]) | |
802 | { | |
803 | if(*nextch == '*') | |
804 | val = SPOWER; | |
805 | else val = SCONCAT; | |
806 | nextch+=2; | |
807 | } | |
808 | else { | |
809 | val = pp->punval; | |
810 | if(val==SLPAR) | |
811 | ++parlev; | |
812 | else if(val==SRPAR) | |
813 | --parlev; | |
814 | ++nextch; | |
815 | } | |
816 | return(val); | |
817 | } | |
818 | if(*nextch == '.') | |
819 | if(nextch >= lastch) goto badchar; | |
820 | else if(isdigit(nextch[1])) goto numconst; | |
821 | else { | |
822 | for(pd=dots ; (j=pd->dotname) ; ++pd) | |
823 | { | |
824 | for(i=nextch+1 ; i<=lastch ; ++i) | |
825 | if(*i != *j) break; | |
826 | else if(*i != '.') ++j; | |
827 | else { | |
828 | nextch = i+1; | |
829 | return(pd->dotval); | |
830 | } | |
831 | } | |
832 | goto badchar; | |
833 | } | |
834 | if( isalpha(*nextch) ) | |
835 | { | |
836 | p = token; | |
837 | *p++ = *nextch++; | |
838 | while(nextch<=lastch) | |
839 | if( isalpha(*nextch) || isdigit(*nextch) ) | |
840 | *p++ = *nextch++; | |
841 | else break; | |
842 | toklen = p - token; | |
843 | *p = '\0'; | |
844 | if(inioctl && nextch<=lastch && *nextch=='=') | |
845 | { | |
846 | ++nextch; | |
847 | return(SNAMEEQ); | |
848 | } | |
849 | if(toklen>8 && eqn(8,token,"function") && isalpha(token[8]) && | |
850 | nextch<lastch && nextch[0]=='(' && | |
851 | (nextch[1]==')' | isalpha(nextch[1])) ) | |
852 | { | |
853 | nextch -= (toklen - 8); | |
854 | return(SFUNCTION); | |
855 | } | |
856 | if(toklen > VL) | |
857 | { | |
858 | char buff[30]; | |
859 | sprintf(buff, "name %s too long, truncated to %d", | |
860 | token, VL); | |
861 | err(buff); | |
862 | toklen = VL; | |
863 | token[VL] = '\0'; | |
864 | } | |
865 | if(toklen==1 && *nextch==MYQUOTE) | |
866 | { | |
867 | switch(token[0]) | |
868 | { | |
869 | case 'z': case 'Z': | |
870 | case 'x': case 'X': | |
871 | radix = 16; break; | |
872 | case 'o': case 'O': | |
873 | radix = 8; break; | |
874 | case 'b': case 'B': | |
875 | radix = 2; break; | |
876 | default: | |
877 | err("bad bit identifier"); | |
878 | return(SNAME); | |
879 | } | |
880 | ++nextch; | |
881 | for(p = token ; *nextch!=MYQUOTE ; ) | |
882 | if ( *nextch == BLANK || *nextch == '\t') | |
883 | nextch++; | |
884 | else | |
885 | { | |
886 | if (isupper(*nextch)) | |
887 | *nextch = tolower(*nextch); | |
888 | if (hextoi(*p++ = *nextch++) >= radix) | |
889 | { | |
890 | err("invalid binary character"); | |
891 | break; | |
892 | } | |
893 | } | |
894 | ++nextch; | |
895 | toklen = p - token; | |
896 | return( radix==16 ? SHEXCON : | |
897 | (radix==8 ? SOCTCON : SBITCON) ); | |
898 | } | |
899 | return(SNAME); | |
900 | } | |
901 | if( ! isdigit(*nextch) ) goto badchar; | |
902 | numconst: | |
903 | havdot = NO; | |
904 | havexp = NO; | |
905 | havdbl = NO; | |
906 | for(n1 = nextch ; nextch<=lastch ; ++nextch) | |
907 | { | |
908 | if(*nextch == '.') | |
909 | if(havdot) break; | |
910 | else if(nextch+2<=lastch && isalpha(nextch[1]) | |
911 | && isalpha(nextch[2])) | |
912 | break; | |
913 | else havdot = YES; | |
914 | else if( !intonly && (*nextch=='d' || *nextch=='e') ) | |
915 | { | |
916 | p = nextch; | |
917 | havexp = YES; | |
918 | if(*nextch == 'd') | |
919 | havdbl = YES; | |
920 | if(nextch<lastch) | |
921 | if(nextch[1]=='+' || nextch[1]=='-') | |
922 | ++nextch; | |
923 | if( (nextch >= lastch) || ! isdigit(*++nextch) ) | |
924 | { | |
925 | nextch = p; | |
926 | havdbl = havexp = NO; | |
927 | break; | |
928 | } | |
929 | for(++nextch ; | |
930 | nextch<=lastch && isdigit(*nextch); | |
931 | ++nextch); | |
932 | break; | |
933 | } | |
934 | else if( ! isdigit(*nextch) ) | |
935 | break; | |
936 | } | |
937 | p = token; | |
938 | i = n1; | |
939 | while(i < nextch) | |
940 | *p++ = *i++; | |
941 | toklen = p - token; | |
942 | *p = '\0'; | |
943 | if(havdbl) return(SDCON); | |
944 | if(havdot || havexp) return(SRCON); | |
945 | return(SICON); | |
946 | badchar: | |
947 | s[0] = *nextch++; | |
948 | return(SUNKNOWN); | |
949 | } | |
950 | \f | |
951 | /* KEYWORD AND SPECIAL CHARACTER TABLES | |
952 | */ | |
953 | ||
954 | struct Punctlist puncts[ ] = | |
955 | { | |
956 | '(', SLPAR, | |
957 | ')', SRPAR, | |
958 | '=', SEQUALS, | |
959 | ',', SCOMMA, | |
960 | '+', SPLUS, | |
961 | '-', SMINUS, | |
962 | '*', SSTAR, | |
963 | '/', SSLASH, | |
964 | '$', SCURRENCY, | |
965 | ':', SCOLON, | |
966 | 0, 0 } ; | |
967 | ||
968 | /* | |
969 | LOCAL struct Fmtlist fmts[ ] = | |
970 | { | |
971 | '(', SLPAR, | |
972 | ')', SRPAR, | |
973 | '/', SSLASH, | |
974 | ',', SCOMMA, | |
975 | '-', SMINUS, | |
976 | ':', SCOLON, | |
977 | 0, 0 } ; | |
978 | */ | |
979 | ||
980 | LOCAL struct Dotlist dots[ ] = | |
981 | { | |
982 | "and.", SAND, | |
983 | "or.", SOR, | |
984 | "not.", SNOT, | |
985 | "true.", STRUE, | |
986 | "false.", SFALSE, | |
987 | "eq.", SEQ, | |
988 | "ne.", SNE, | |
989 | "lt.", SLT, | |
990 | "le.", SLE, | |
991 | "gt.", SGT, | |
992 | "ge.", SGE, | |
993 | "neqv.", SNEQV, | |
994 | "eqv.", SEQV, | |
995 | 0, 0 } ; | |
996 | ||
997 | LOCAL struct Keylist keys[ ] = | |
998 | { | |
999 | { "assign", SASSIGN }, | |
1000 | { "automatic", SAUTOMATIC, YES }, | |
1001 | { "backspace", SBACKSPACE }, | |
1002 | { "blockdata", SBLOCK }, | |
1003 | { "call", SCALL }, | |
1004 | { "character", SCHARACTER, YES }, | |
1005 | { "close", SCLOSE, YES }, | |
1006 | { "common", SCOMMON }, | |
1007 | { "complex", SCOMPLEX }, | |
1008 | { "continue", SCONTINUE }, | |
1009 | { "data", SDATA }, | |
1010 | { "dimension", SDIMENSION }, | |
1011 | { "doubleprecision", SDOUBLE }, | |
1012 | { "doublecomplex", SDCOMPLEX, YES }, | |
1013 | { "elseif", SELSEIF, YES }, | |
1014 | { "else", SELSE, YES }, | |
1015 | { "endfile", SENDFILE }, | |
1016 | { "endif", SENDIF, YES }, | |
1017 | { "end", SEND }, | |
1018 | { "entry", SENTRY, YES }, | |
1019 | { "equivalence", SEQUIV }, | |
1020 | { "external", SEXTERNAL }, | |
1021 | { "format", SFORMAT }, | |
1022 | { "function", SFUNCTION }, | |
1023 | { "goto", SGOTO }, | |
1024 | { "implicit", SIMPLICIT, YES }, | |
1025 | { "include", SINCLUDE, YES }, | |
1026 | { "inquire", SINQUIRE, YES }, | |
1027 | { "intrinsic", SINTRINSIC, YES }, | |
1028 | { "integer", SINTEGER }, | |
1029 | { "logical", SLOGICAL }, | |
1030 | #ifdef NAMELIST | |
1031 | { "namelist", SNAMELIST, YES }, | |
1032 | #endif | |
1033 | { "none", SUNDEFINED, YES }, | |
1034 | { "open", SOPEN, YES }, | |
1035 | { "parameter", SPARAM, YES }, | |
1036 | { "pause", SPAUSE }, | |
1037 | { "print", SPRINT }, | |
1038 | { "program", SPROGRAM, YES }, | |
1039 | { "punch", SPUNCH, YES }, | |
1040 | { "read", SREAD }, | |
1041 | { "real", SREAL }, | |
1042 | { "return", SRETURN }, | |
1043 | { "rewind", SREWIND }, | |
1044 | { "save", SSAVE, YES }, | |
1045 | { "static", SSTATIC, YES }, | |
1046 | { "stop", SSTOP }, | |
1047 | { "subroutine", SSUBROUTINE }, | |
1048 | { "then", STHEN, YES }, | |
1049 | { "undefined", SUNDEFINED, YES }, | |
1050 | { "write", SWRITE }, | |
1051 | { 0, 0 } | |
1052 | }; |