Commit | Line | Data |
---|---|---|
252367af DF |
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[] = "@(#)yycomm.c 5.1 (Berkeley) %G%"; | |
9 | #endif not lint | |
10 | ||
16f88651 PK |
11 | /* |
12 | * pxp - Pascal execution profiler | |
13 | * | |
14 | * Bill Joy UCB | |
15 | * Version 1.2 January 1979 | |
16 | */ | |
17 | ||
5bbe9cdb | 18 | #include "whoami.h" |
16f88651 PK |
19 | #include "0.h" |
20 | #include "yy.h" | |
21 | ||
22 | /* | |
23 | * COMMENT PROCESSING CLUSTER | |
24 | * | |
25 | * The global organization of this cluster is as follows. | |
26 | * While parsing the program information is saved in the tree which | |
27 | * tells the source text coordinates (sequence numbers and columns) | |
28 | * bounding each production. The comments from the source program | |
29 | * are also saved, with information about their source text position | |
30 | * and a classification as to their kind. | |
31 | * | |
32 | * When printing the reformatted program we flush out the comments | |
33 | * at various points using the information in the comments and the parse | |
34 | * tree to "resynchronize". A number of special cases are recognized to | |
35 | * deal with the vagarities of producing a true "fixed point" so that | |
36 | * a prettyprinted program will re-prettyprint to itself. | |
37 | */ | |
38 | ||
39 | /* | |
40 | * Save sequence id's and column markers bounding a production | |
41 | * for later use in placing comments. We save the sequence id | |
42 | * and column of the leftmost token and the following token, and | |
43 | * the sequence id of the last token in this reduction. | |
44 | * See putcm, putcml, and putcmp below for motivation. | |
45 | */ | |
46 | line2of(l) | |
47 | int l; | |
48 | { | |
49 | ||
50 | return (lineNof(l, 2)); | |
51 | } | |
52 | ||
53 | lineof(l) | |
54 | int l; | |
55 | { | |
56 | ||
57 | return (lineNof(l, 1)); | |
58 | } | |
59 | ||
60 | lineNof(l, i) | |
61 | int l, i; | |
62 | { | |
63 | ||
64 | return(tree(6, l, yypw[i].Wseqid, yypw[i].Wcol, yyseqid, yycol, yypw[N].Wseqid)); | |
65 | } | |
66 | ||
67 | /* | |
68 | * After a call to setline, Seqid is set to the sequence id | |
69 | * of the symbol which followed the reduction in which the | |
70 | * lineof call was embedded, Col to the associated column, | |
71 | * and LSeqid to the sequence id of the last symbol in the reduction | |
72 | * (Note that this is exact only if the last symbol was a terminal | |
73 | * this is always true when it matters.) | |
74 | */ | |
75 | int Seqid, Col, LSeqid; | |
76 | ||
77 | /* | |
78 | * Retrieve the information from a call to lineof before beginning the | |
79 | * output of a tree from a reduction. First flush to the left margin | |
80 | * of the production, and then set so that later calls to putcm, putcml | |
81 | * and putcmp will deal with the right margin of this comment. | |
82 | * | |
83 | * The routine setinfo is called when the lineof has no embedded line | |
84 | * number to avoid trashing the current "line". | |
85 | * | |
86 | * The routine setinfo is often called after completing the output of | |
87 | * the text of a tree to restore Seqid, Col, and LSeqid which may have | |
88 | * been destroyed by the nested processing calls to setline. | |
89 | * In this case the only effect of the call to setinfo is to | |
90 | * modify the above three variables as a side effect. | |
91 | * | |
92 | * We return a word giving information about the comments which were | |
93 | * actually put out. See putcm for details. | |
94 | */ | |
95 | setline(ip) | |
96 | int *ip; | |
97 | { | |
98 | ||
99 | line = ip[0]; | |
100 | return(setinfo(ip)); | |
101 | } | |
102 | ||
103 | setinfo(ip) | |
104 | register int *ip; | |
105 | { | |
106 | register int i; | |
107 | ||
108 | ip++; | |
109 | Seqid = *ip++; | |
110 | Col = *ip++; | |
111 | i = putcm(); | |
112 | Seqid = *ip++; | |
113 | Col = *ip++; | |
114 | LSeqid = *ip++; | |
115 | return (i); | |
116 | } | |
117 | ||
118 | char cmeof, incomm; | |
119 | ||
120 | /* | |
121 | * Get the text of a comment from the input stream, | |
122 | * recording its type and linking it into the linked | |
123 | * list of comments headed by cmhp. | |
124 | */ | |
125 | getcm(cmdelim) | |
126 | char cmdelim; | |
127 | { | |
128 | int cmjust, col; | |
129 | register struct comment *cp; | |
130 | register struct commline *kp; | |
131 | ||
132 | incomm = 1; | |
133 | if (cmdelim == '*' && yycol == 10 || cmdelim == '{' && yycol == 9) | |
134 | cmjust = CLMARG; | |
135 | else if (yytokcnt <= 1) | |
136 | cmjust = CALIGN; | |
137 | else if (yywhcnt < 2) | |
138 | cmjust = CTRAIL; | |
139 | else | |
140 | cmjust = CRMARG; | |
141 | col = yycol - (cmdelim == '{' ? 1 : 2); | |
142 | cp = tree5(NIL, cmdelim, NIL, cmjust, yyseqid); | |
143 | cmeof = 0; | |
144 | do { | |
145 | kp = getcmline(cmdelim); | |
146 | if (cp->cml == NIL) { | |
147 | kp->cml = kp; | |
148 | kp->cmcol = col; | |
149 | } else { | |
150 | kp->cml = cp->cml->cml; | |
151 | cp->cml->cml = kp; | |
152 | switch (cp->cmjust) { | |
153 | case CTRAIL: | |
154 | case CRMARG: | |
155 | cp->cmjust = CALIGN; | |
156 | } | |
157 | } | |
158 | cp->cml = kp; | |
159 | } while (!cmeof); | |
160 | newcomm(cp); | |
161 | incomm = 0; | |
162 | } | |
163 | ||
164 | /* | |
165 | * Chain the new comment at "cp" onto the linked list of comments. | |
166 | */ | |
167 | newcomm(cp) | |
168 | register struct comment *cp; | |
169 | { | |
170 | ||
171 | if (cmhp == NIL) | |
172 | cp->cmnext = cp; | |
173 | else { | |
174 | cp->cmnext = cmhp->cmnext; | |
175 | cmhp->cmnext = cp; | |
176 | } | |
177 | cmhp = cp; | |
178 | } | |
179 | ||
180 | ||
181 | int nilcml[3]; | |
182 | ||
183 | quickcomm(t) | |
184 | int t; | |
185 | { | |
186 | ||
187 | if (incomm) | |
188 | return; | |
189 | newcomm(tree5(nilcml, NIL, NIL, t, yyseqid)); | |
190 | } | |
191 | ||
192 | commincl(cp, ch) | |
193 | char *cp, ch; | |
194 | { | |
195 | ||
196 | newcomm(tree5(nilcml, savestr(cp), ch, CINCLUD, yyseqid)); | |
197 | } | |
198 | ||
199 | getcmline(cmdelim) | |
200 | char cmdelim; | |
201 | { | |
202 | char lastc; | |
203 | register char *tp; | |
204 | register CHAR c; | |
205 | register struct commline *kp; | |
206 | ||
207 | c = readch(); | |
208 | kp = tree3(NIL, yycol, NIL); | |
209 | tp = token; | |
210 | lastc = 0; | |
211 | for (;;) { | |
212 | switch (c) { | |
213 | case '}': | |
214 | if (cmdelim == '{') | |
215 | goto endcm; | |
216 | break; | |
217 | case ')': | |
218 | if (cmdelim == '*' && lastc == '*') { | |
219 | --tp; | |
220 | goto endcm; | |
221 | } | |
222 | break; | |
223 | case '\n': | |
224 | goto done; | |
225 | case -1: | |
226 | yerror("Comment does not terminate - QUIT"); | |
227 | pexit(ERRS); | |
228 | } | |
229 | lastc = c; | |
230 | *tp++ = c; | |
231 | c = readch(); | |
232 | } | |
233 | endcm: | |
234 | cmeof++; | |
235 | done: | |
236 | *tp = 0; | |
237 | kp->cmtext = copystr(token); | |
238 | return (kp); | |
239 | } | |
240 | ||
241 | /* | |
242 | * Flush through the line this token is on. | |
243 | * Ignore if next token on same line as this one. | |
244 | */ | |
245 | putcml() | |
246 | { | |
247 | register int i, SSeqid, SCol; | |
248 | ||
249 | if (Seqid == LSeqid) | |
250 | return (1); | |
251 | SSeqid = Seqid, SCol = Col; | |
252 | Seqid = LSeqid, Col = 32767; | |
253 | i = putcm(); | |
254 | Seqid = SSeqid, Col = SCol; | |
255 | return (i); | |
256 | } | |
257 | ||
258 | /* | |
259 | * Flush to the beginning of the line this token is on. | |
260 | * Ignore if this token is on the same line as the previous one | |
261 | * (effectively since all such already then flushed.) | |
262 | */ | |
263 | putcmp() | |
264 | { | |
265 | register int i, SSeqid, SCol; | |
266 | ||
267 | SSeqid = Seqid, SCol = Col; | |
268 | Seqid = LSeqid, Col = 0; | |
269 | i = putcm(); | |
270 | Seqid = SSeqid, Col = SCol; | |
271 | return (i); | |
272 | } | |
273 | ||
274 | /* | |
275 | * Put out the comments to the border indicated by Seqid and Col | |
276 | */ | |
277 | putcm() | |
278 | { | |
279 | register struct comment *cp; | |
280 | register int i; | |
281 | ||
282 | cp = cmhp; | |
283 | if (cp == NIL) | |
284 | return (0); | |
285 | i = 0; | |
286 | cp = cp->cmnext; | |
287 | while (cp->cmseqid < Seqid || cp->cmseqid == Seqid && cp->cml->cmcol < Col) { | |
288 | putone(cp); | |
289 | i =| 1 << cp->cmjust; | |
290 | if (cp->cmnext == cp) { | |
291 | cmhp = NIL; | |
292 | break; | |
293 | } | |
294 | cp = cp->cmnext; | |
295 | cmhp->cmnext = cp; | |
296 | } | |
297 | return (i); | |
298 | } | |
299 | ||
300 | /* | |
301 | * Put out one comment. | |
302 | * Note that empty lines, form feeds and #include statements | |
303 | * are treated as comments are regurgitated here. | |
304 | */ | |
305 | putone(cp) | |
306 | register struct comment *cp; | |
307 | { | |
308 | register struct commline *cml, *cmf; | |
309 | ||
310 | align(cp); | |
311 | switch (cp->cmjust) { | |
312 | case CINCLUD: | |
313 | /* ppflush() */ | |
314 | if (noinclude == 0) { | |
315 | putchar('\f'); | |
316 | return; | |
317 | } | |
318 | printf("#include %c%s%c", cp->cml, cp->cmdelim, cp->cml); | |
319 | return; | |
320 | } | |
321 | if (stripcomm) | |
322 | return; | |
323 | switch (cp->cmjust) { | |
324 | case CFORM: | |
325 | ppop("\f"); | |
326 | ppnl(); | |
327 | case CNL: | |
328 | case CNLBL: | |
329 | return; | |
330 | } | |
331 | ppbra(cp->cmdelim == '{' ? "{" : "(*"); | |
332 | cmf = cp->cml->cml; | |
333 | ppid(cmf->cmtext); | |
334 | for (cml = cmf->cml; cml != cmf; cml = cml->cml) { | |
335 | align(cp); | |
336 | oneline(cmf->cmcol, cml); | |
337 | } | |
338 | ppket(cp->cmdelim == '{' ? "}" : "*)"); | |
339 | } | |
340 | ||
341 | /* | |
342 | * Do the preliminary horizontal and vertical | |
343 | * motions necessary before beginning a comment, | |
344 | * or between lines of a mult-line comment. | |
345 | */ | |
346 | align(cp) | |
347 | register struct comment *cp; | |
348 | { | |
349 | ||
350 | switch (cp->cmjust) { | |
351 | case CNL: | |
352 | ppsnl(); | |
353 | break; | |
354 | case CNLBL: | |
355 | ppsnlb(); | |
356 | break; | |
357 | case CFORM: | |
358 | case CINCLUD: | |
359 | ppnl(); | |
360 | break; | |
361 | case CLMARG: | |
362 | ppnl(); | |
363 | if (profile) | |
364 | ppid("\t"); | |
365 | break; | |
366 | case CALIGN: | |
367 | ppnl(); | |
368 | indent(); | |
369 | break; | |
370 | case CTRAIL: | |
371 | ppspac(); | |
372 | break; | |
373 | case CRMARG: | |
374 | case CSRMARG: | |
375 | pptab(); | |
376 | break; | |
377 | } | |
378 | } | |
379 | ||
380 | /* | |
381 | * One line of a multi-line comment | |
382 | * Deal with alignment and initial white space trimming. | |
383 | * The "margin" indicates where the first line of the | |
384 | * comment began... don't print stuff in this comment | |
385 | * which came before this. | |
386 | */ | |
387 | oneline(margin, cml) | |
388 | int margin; | |
389 | struct commline *cml; | |
390 | { | |
391 | register char *tp; | |
392 | register int i; | |
393 | ||
394 | for (i = 8, tp = cml->cmtext; i < margin && *tp; tp++) | |
395 | switch (*tp) { | |
396 | case ' ': | |
397 | i++; | |
398 | continue; | |
399 | case '\t': | |
400 | i =+ 8; | |
401 | i =& ~7; | |
402 | if (i < margin) | |
403 | continue; | |
404 | ppop("\t"); | |
405 | default: | |
406 | goto out; | |
407 | } | |
408 | out: | |
409 | ppid(tp); | |
410 | } | |
411 | ||
412 | /* | |
413 | * Flush all comments | |
414 | */ | |
415 | flushcm() | |
416 | { | |
417 | ||
418 | Seqid = 32767; | |
419 | return(putcm()); | |
420 | } | |
421 | ||
422 | #define BLANKS ((1 << CNL) | (1 << CNLBL) | (1 << CFORM)) | |
423 | noblank(i) | |
424 | int i; | |
425 | { | |
426 | ||
427 | return ((i & BLANKS) == 0); | |
428 | } | |
429 | ||
430 | int needform, neednlbl, neednl, needseqid; | |
431 | ||
432 | needtree() | |
433 | { | |
434 | register struct comment *cp; | |
435 | ||
436 | needform = neednlbl = neednl = 0; | |
437 | cp = cmhp; | |
438 | if (cp == NIL) | |
439 | return (0); | |
440 | do { | |
441 | switch (cp->cmjust) { | |
442 | case CNL: | |
443 | neednl++; | |
444 | goto seq; | |
445 | case CNLBL: | |
446 | neednlbl++; | |
447 | goto seq; | |
448 | case CFORM: | |
449 | needform++; | |
450 | seq: | |
451 | needseqid = cp->cmseqid; | |
452 | break; | |
453 | default: | |
454 | neednl = neednlbl = needform = 0; | |
455 | return (1); | |
456 | } | |
457 | cp = cp->cmnext; | |
458 | } while (cp != cmhp); | |
459 | cmhp = NIL; | |
460 | return (0); | |
461 | } | |
462 | ||
463 | packtree() | |
464 | { | |
465 | int save; | |
466 | ||
467 | save = yyseqid; | |
468 | yyseqid = needseqid; | |
469 | for (; needform > 0; needform--) | |
470 | commform(); | |
471 | for (; neednl > 0; neednl--) | |
472 | commnl(); | |
473 | for (; neednlbl > 0; neednlbl--) | |
474 | commnlbl(); | |
475 | yyseqid = save; | |
476 | } |