Commit | Line | Data |
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731f59cf BJ |
1 | /* Copyright (c) 1979 Regents of the University of California */ |
2 | # | |
3 | /* | |
4 | * pxp - Pascal execution profiler | |
5 | * | |
6 | * Bill Joy UCB | |
7 | * Version 1.2 January 1979 | |
8 | */ | |
9 | ||
10 | #include "0.h" | |
11 | #include "yy.h" | |
12 | ||
13 | /* | |
14 | * COMMENT PROCESSING CLUSTER | |
15 | * | |
16 | * The global organization of this cluster is as follows. | |
17 | * While parsing the program information is saved in the tree which | |
18 | * tells the source text coordinates (sequence numbers and columns) | |
19 | * bounding each production. The comments from the source program | |
20 | * are also saved, with information about their source text position | |
21 | * and a classification as to their kind. | |
22 | * | |
23 | * When printing the reformatted program we flush out the comments | |
24 | * at various points using the information in the comments and the parse | |
25 | * tree to "resynchronize". A number of special cases are recognized to | |
26 | * deal with the vagarities of producing a true "fixed point" so that | |
27 | * a prettyprinted program will re-prettyprint to itself. | |
28 | */ | |
29 | ||
30 | /* | |
31 | * Save sequence id's and column markers bounding a production | |
32 | * for later use in placing comments. We save the sequence id | |
33 | * and column of the leftmost token and the following token, and | |
34 | * the sequence id of the last token in this reduction. | |
35 | * See putcm, putcml, and putcmp below for motivation. | |
36 | */ | |
37 | line2of(l) | |
38 | int l; | |
39 | { | |
40 | ||
41 | return (lineNof(l, 2)); | |
42 | } | |
43 | ||
44 | lineof(l) | |
45 | int l; | |
46 | { | |
47 | ||
48 | return (lineNof(l, 1)); | |
49 | } | |
50 | ||
51 | lineNof(l, i) | |
52 | int l, i; | |
53 | { | |
54 | ||
55 | return(tree(6, l, yypw[i].Wseqid, yypw[i].Wcol, yyseqid, yycol, yypw[N].Wseqid)); | |
56 | } | |
57 | ||
58 | /* | |
59 | * After a call to setline, Seqid is set to the sequence id | |
60 | * of the symbol which followed the reduction in which the | |
61 | * lineof call was embedded, Col to the associated column, | |
62 | * and LSeqid to the sequence id of the last symbol in the reduction | |
63 | * (Note that this is exact only if the last symbol was a terminal | |
64 | * this is always true when it matters.) | |
65 | */ | |
66 | int Seqid, Col, LSeqid; | |
67 | ||
68 | /* | |
69 | * Retrieve the information from a call to lineof before beginning the | |
70 | * output of a tree from a reduction. First flush to the left margin | |
71 | * of the production, and then set so that later calls to putcm, putcml | |
72 | * and putcmp will deal with the right margin of this comment. | |
73 | * | |
74 | * The routine setinfo is called when the lineof has no embedded line | |
75 | * number to avoid trashing the current "line". | |
76 | * | |
77 | * The routine setinfo is often called after completing the output of | |
78 | * the text of a tree to restore Seqid, Col, and LSeqid which may have | |
79 | * been destroyed by the nested processing calls to setline. | |
80 | * In this case the only effect of the call to setinfo is to | |
81 | * modify the above three variables as a side effect. | |
82 | * | |
83 | * We return a word giving information about the comments which were | |
84 | * actually put out. See putcm for details. | |
85 | */ | |
86 | setline(ip) | |
87 | int *ip; | |
88 | { | |
89 | ||
90 | line = ip[0]; | |
91 | return(setinfo(ip)); | |
92 | } | |
93 | ||
94 | setinfo(ip) | |
95 | register int *ip; | |
96 | { | |
97 | register int i; | |
98 | ||
99 | ip++; | |
100 | Seqid = *ip++; | |
101 | Col = *ip++; | |
102 | i = putcm(); | |
103 | Seqid = *ip++; | |
104 | Col = *ip++; | |
105 | LSeqid = *ip++; | |
106 | return (i); | |
107 | } | |
108 | ||
109 | char cmeof, incomm; | |
110 | ||
111 | /* | |
112 | * Get the text of a comment from the input stream, | |
113 | * recording its type and linking it into the linked | |
114 | * list of comments headed by cmhp. | |
115 | */ | |
116 | getcm(cmdelim) | |
117 | char cmdelim; | |
118 | { | |
119 | int cmjust, col; | |
120 | register struct comment *cp; | |
121 | register struct commline *kp; | |
122 | ||
123 | incomm = 1; | |
124 | if (cmdelim == '*' && yycol == 10 || cmdelim == '{' && yycol == 9) | |
125 | cmjust = CLMARG; | |
126 | else if (yytokcnt <= 1) | |
127 | cmjust = CALIGN; | |
128 | else if (yywhcnt < 2) | |
129 | cmjust = CTRAIL; | |
130 | else | |
131 | cmjust = CRMARG; | |
132 | col = yycol - (cmdelim == '{' ? 1 : 2); | |
133 | cp = tree5(NIL, cmdelim, NIL, cmjust, yyseqid); | |
134 | cmeof = 0; | |
135 | do { | |
136 | kp = getcmline(cmdelim); | |
137 | if (cp->cml == NIL) { | |
138 | kp->cml = kp; | |
139 | kp->cmcol = col; | |
140 | } else { | |
141 | kp->cml = cp->cml->cml; | |
142 | cp->cml->cml = kp; | |
143 | switch (cp->cmjust) { | |
144 | case CTRAIL: | |
145 | case CRMARG: | |
146 | cp->cmjust = CALIGN; | |
147 | } | |
148 | } | |
149 | cp->cml = kp; | |
150 | } while (!cmeof); | |
151 | newcomm(cp); | |
152 | incomm = 0; | |
153 | } | |
154 | ||
155 | /* | |
156 | * Chain the new comment at "cp" onto the linked list of comments. | |
157 | */ | |
158 | newcomm(cp) | |
159 | register struct comment *cp; | |
160 | { | |
161 | ||
162 | if (cmhp == NIL) | |
163 | cp->cmnext = cp; | |
164 | else { | |
165 | cp->cmnext = cmhp->cmnext; | |
166 | cmhp->cmnext = cp; | |
167 | } | |
168 | cmhp = cp; | |
169 | } | |
170 | ||
171 | ||
172 | int nilcml[3]; | |
173 | ||
174 | quickcomm(t) | |
175 | int t; | |
176 | { | |
177 | ||
178 | if (incomm) | |
179 | return; | |
180 | newcomm(tree5(nilcml, NIL, NIL, t, yyseqid)); | |
181 | } | |
182 | ||
183 | commincl(cp, ch) | |
184 | char *cp, ch; | |
185 | { | |
186 | ||
187 | newcomm(tree5(nilcml, savestr(cp), ch, CINCLUD, yyseqid)); | |
188 | } | |
189 | ||
190 | getcmline(cmdelim) | |
191 | char cmdelim; | |
192 | { | |
193 | char lastc; | |
194 | register char *tp; | |
195 | register CHAR c; | |
196 | register struct commline *kp; | |
197 | ||
198 | c = readch(); | |
199 | kp = tree3(NIL, yycol, NIL); | |
200 | tp = token; | |
201 | lastc = 0; | |
202 | for (;;) { | |
203 | switch (c) { | |
204 | case '}': | |
205 | if (cmdelim == '{') | |
206 | goto endcm; | |
207 | break; | |
208 | case ')': | |
209 | if (cmdelim == '*' && lastc == '*') { | |
210 | --tp; | |
211 | goto endcm; | |
212 | } | |
213 | break; | |
214 | case '\n': | |
215 | goto done; | |
216 | case -1: | |
217 | yerror("Comment does not terminate - QUIT"); | |
218 | pexit(ERRS); | |
219 | } | |
220 | lastc = c; | |
221 | *tp++ = c; | |
222 | c = readch(); | |
223 | } | |
224 | endcm: | |
225 | cmeof++; | |
226 | done: | |
227 | *tp = 0; | |
228 | kp->cmtext = copystr(token); | |
229 | return (kp); | |
230 | } | |
231 | ||
232 | /* | |
233 | * Flush through the line this token is on. | |
234 | * Ignore if next token on same line as this one. | |
235 | */ | |
236 | putcml() | |
237 | { | |
238 | register int i, SSeqid, SCol; | |
239 | ||
240 | if (Seqid == LSeqid) | |
241 | return (1); | |
242 | SSeqid = Seqid, SCol = Col; | |
243 | Seqid = LSeqid, Col = 32767; | |
244 | i = putcm(); | |
245 | Seqid = SSeqid, Col = SCol; | |
246 | return (i); | |
247 | } | |
248 | ||
249 | /* | |
250 | * Flush to the beginning of the line this token is on. | |
251 | * Ignore if this token is on the same line as the previous one | |
252 | * (effectively since all such already then flushed.) | |
253 | */ | |
254 | putcmp() | |
255 | { | |
256 | register int i, SSeqid, SCol; | |
257 | ||
258 | SSeqid = Seqid, SCol = Col; | |
259 | Seqid = LSeqid, Col = 0; | |
260 | i = putcm(); | |
261 | Seqid = SSeqid, Col = SCol; | |
262 | return (i); | |
263 | } | |
264 | ||
265 | /* | |
266 | * Put out the comments to the border indicated by Seqid and Col | |
267 | */ | |
268 | putcm() | |
269 | { | |
270 | register struct comment *cp; | |
271 | register int i; | |
272 | ||
273 | cp = cmhp; | |
274 | if (cp == NIL) | |
275 | return (0); | |
276 | i = 0; | |
277 | cp = cp->cmnext; | |
278 | while (cp->cmseqid < Seqid || cp->cmseqid == Seqid && cp->cml->cmcol < Col) { | |
279 | putone(cp); | |
280 | i =| 1 << cp->cmjust; | |
281 | if (cp->cmnext == cp) { | |
282 | cmhp = NIL; | |
283 | break; | |
284 | } | |
285 | cp = cp->cmnext; | |
286 | cmhp->cmnext = cp; | |
287 | } | |
288 | return (i); | |
289 | } | |
290 | ||
291 | /* | |
292 | * Put out one comment. | |
293 | * Note that empty lines, form feeds and #include statements | |
294 | * are treated as comments are regurgitated here. | |
295 | */ | |
296 | putone(cp) | |
297 | register struct comment *cp; | |
298 | { | |
299 | register struct commline *cml, *cmf; | |
300 | ||
301 | align(cp); | |
302 | switch (cp->cmjust) { | |
303 | case CINCLUD: | |
304 | /* ppflush() */ | |
305 | if (noinclude == 0) { | |
306 | putchar('\f'); | |
307 | return; | |
308 | } | |
309 | printf("#include %c%s%c", cp->cml, cp->cmdelim, cp->cml); | |
310 | return; | |
311 | } | |
312 | if (stripcomm) | |
313 | return; | |
314 | switch (cp->cmjust) { | |
315 | case CFORM: | |
316 | ppop("\f"); | |
317 | ppnl(); | |
318 | case CNL: | |
319 | case CNLBL: | |
320 | return; | |
321 | } | |
322 | ppbra(cp->cmdelim == '{' ? "{" : "(*"); | |
323 | cmf = cp->cml->cml; | |
324 | ppid(cmf->cmtext); | |
325 | for (cml = cmf->cml; cml != cmf; cml = cml->cml) { | |
326 | align(cp); | |
327 | oneline(cmf->cmcol, cml); | |
328 | } | |
329 | ppket(cp->cmdelim == '{' ? "}" : "*)"); | |
330 | } | |
331 | ||
332 | /* | |
333 | * Do the preliminary horizontal and vertical | |
334 | * motions necessary before beginning a comment, | |
335 | * or between lines of a mult-line comment. | |
336 | */ | |
337 | align(cp) | |
338 | register struct comment *cp; | |
339 | { | |
340 | ||
341 | switch (cp->cmjust) { | |
342 | case CNL: | |
343 | ppsnl(); | |
344 | break; | |
345 | case CNLBL: | |
346 | ppsnlb(); | |
347 | break; | |
348 | case CFORM: | |
349 | case CINCLUD: | |
350 | ppnl(); | |
351 | break; | |
352 | case CLMARG: | |
353 | ppnl(); | |
354 | if (profile) | |
355 | ppid("\t"); | |
356 | break; | |
357 | case CALIGN: | |
358 | ppnl(); | |
359 | indent(); | |
360 | break; | |
361 | case CTRAIL: | |
362 | ppspac(); | |
363 | break; | |
364 | case CRMARG: | |
365 | case CSRMARG: | |
366 | pptab(); | |
367 | break; | |
368 | } | |
369 | } | |
370 | ||
371 | /* | |
372 | * One line of a multi-line comment | |
373 | * Deal with alignment and initial white space trimming. | |
374 | * The "margin" indicates where the first line of the | |
375 | * comment began... don't print stuff in this comment | |
376 | * which came before this. | |
377 | */ | |
378 | oneline(margin, cml) | |
379 | int margin; | |
380 | struct commline *cml; | |
381 | { | |
382 | register char *tp; | |
383 | register int i; | |
384 | ||
385 | for (i = 8, tp = cml->cmtext; i < margin && *tp; tp++) | |
386 | switch (*tp) { | |
387 | case ' ': | |
388 | i++; | |
389 | continue; | |
390 | case '\t': | |
391 | i =+ 8; | |
392 | i =& ~7; | |
393 | if (i < margin) | |
394 | continue; | |
395 | ppop("\t"); | |
396 | default: | |
397 | goto out; | |
398 | } | |
399 | out: | |
400 | ppid(tp); | |
401 | } | |
402 | ||
403 | /* | |
404 | * Flush all comments | |
405 | */ | |
406 | flushcm() | |
407 | { | |
408 | ||
409 | Seqid = 32767; | |
410 | return(putcm()); | |
411 | } | |
412 | ||
413 | #define BLANKS ((1 << CNL) | (1 << CNLBL) | (1 << CFORM)) | |
414 | noblank(i) | |
415 | int i; | |
416 | { | |
417 | ||
418 | return ((i & BLANKS) == 0); | |
419 | } | |
420 | ||
421 | int needform, neednlbl, neednl, needseqid; | |
422 | ||
423 | needtree() | |
424 | { | |
425 | register struct comment *cp; | |
426 | ||
427 | needform = neednlbl = neednl = 0; | |
428 | cp = cmhp; | |
429 | if (cp == NIL) | |
430 | return (0); | |
431 | do { | |
432 | switch (cp->cmjust) { | |
433 | case CNL: | |
434 | neednl++; | |
435 | goto seq; | |
436 | case CNLBL: | |
437 | neednlbl++; | |
438 | goto seq; | |
439 | case CFORM: | |
440 | needform++; | |
441 | seq: | |
442 | needseqid = cp->cmseqid; | |
443 | break; | |
444 | default: | |
445 | neednl = neednlbl = needform = 0; | |
446 | return (1); | |
447 | } | |
448 | cp = cp->cmnext; | |
449 | } while (cp != cmhp); | |
450 | cmhp = NIL; | |
451 | return (0); | |
452 | } | |
453 | ||
454 | packtree() | |
455 | { | |
456 | int save; | |
457 | ||
458 | save = yyseqid; | |
459 | yyseqid = needseqid; | |
460 | for (; needform > 0; needform--) | |
461 | commform(); | |
462 | for (; neednl > 0; neednl--) | |
463 | commnl(); | |
464 | for (; neednlbl > 0; neednlbl--) | |
465 | commnlbl(); | |
466 | yyseqid = save; | |
467 | } |