Commit | Line | Data |
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16f88651 PK |
1 | static char *sccsid = "@(#)yycomm.c 1.1 (Berkeley) %G%"; |
2 | /* Copyright (c) 1979 Regents of the University of California */ | |
3 | # | |
4 | /* | |
5 | * pxp - Pascal execution profiler | |
6 | * | |
7 | * Bill Joy UCB | |
8 | * Version 1.2 January 1979 | |
9 | */ | |
10 | ||
11 | #include "0.h" | |
12 | #include "yy.h" | |
13 | ||
14 | /* | |
15 | * COMMENT PROCESSING CLUSTER | |
16 | * | |
17 | * The global organization of this cluster is as follows. | |
18 | * While parsing the program information is saved in the tree which | |
19 | * tells the source text coordinates (sequence numbers and columns) | |
20 | * bounding each production. The comments from the source program | |
21 | * are also saved, with information about their source text position | |
22 | * and a classification as to their kind. | |
23 | * | |
24 | * When printing the reformatted program we flush out the comments | |
25 | * at various points using the information in the comments and the parse | |
26 | * tree to "resynchronize". A number of special cases are recognized to | |
27 | * deal with the vagarities of producing a true "fixed point" so that | |
28 | * a prettyprinted program will re-prettyprint to itself. | |
29 | */ | |
30 | ||
31 | /* | |
32 | * Save sequence id's and column markers bounding a production | |
33 | * for later use in placing comments. We save the sequence id | |
34 | * and column of the leftmost token and the following token, and | |
35 | * the sequence id of the last token in this reduction. | |
36 | * See putcm, putcml, and putcmp below for motivation. | |
37 | */ | |
38 | line2of(l) | |
39 | int l; | |
40 | { | |
41 | ||
42 | return (lineNof(l, 2)); | |
43 | } | |
44 | ||
45 | lineof(l) | |
46 | int l; | |
47 | { | |
48 | ||
49 | return (lineNof(l, 1)); | |
50 | } | |
51 | ||
52 | lineNof(l, i) | |
53 | int l, i; | |
54 | { | |
55 | ||
56 | return(tree(6, l, yypw[i].Wseqid, yypw[i].Wcol, yyseqid, yycol, yypw[N].Wseqid)); | |
57 | } | |
58 | ||
59 | /* | |
60 | * After a call to setline, Seqid is set to the sequence id | |
61 | * of the symbol which followed the reduction in which the | |
62 | * lineof call was embedded, Col to the associated column, | |
63 | * and LSeqid to the sequence id of the last symbol in the reduction | |
64 | * (Note that this is exact only if the last symbol was a terminal | |
65 | * this is always true when it matters.) | |
66 | */ | |
67 | int Seqid, Col, LSeqid; | |
68 | ||
69 | /* | |
70 | * Retrieve the information from a call to lineof before beginning the | |
71 | * output of a tree from a reduction. First flush to the left margin | |
72 | * of the production, and then set so that later calls to putcm, putcml | |
73 | * and putcmp will deal with the right margin of this comment. | |
74 | * | |
75 | * The routine setinfo is called when the lineof has no embedded line | |
76 | * number to avoid trashing the current "line". | |
77 | * | |
78 | * The routine setinfo is often called after completing the output of | |
79 | * the text of a tree to restore Seqid, Col, and LSeqid which may have | |
80 | * been destroyed by the nested processing calls to setline. | |
81 | * In this case the only effect of the call to setinfo is to | |
82 | * modify the above three variables as a side effect. | |
83 | * | |
84 | * We return a word giving information about the comments which were | |
85 | * actually put out. See putcm for details. | |
86 | */ | |
87 | setline(ip) | |
88 | int *ip; | |
89 | { | |
90 | ||
91 | line = ip[0]; | |
92 | return(setinfo(ip)); | |
93 | } | |
94 | ||
95 | setinfo(ip) | |
96 | register int *ip; | |
97 | { | |
98 | register int i; | |
99 | ||
100 | ip++; | |
101 | Seqid = *ip++; | |
102 | Col = *ip++; | |
103 | i = putcm(); | |
104 | Seqid = *ip++; | |
105 | Col = *ip++; | |
106 | LSeqid = *ip++; | |
107 | return (i); | |
108 | } | |
109 | ||
110 | char cmeof, incomm; | |
111 | ||
112 | /* | |
113 | * Get the text of a comment from the input stream, | |
114 | * recording its type and linking it into the linked | |
115 | * list of comments headed by cmhp. | |
116 | */ | |
117 | getcm(cmdelim) | |
118 | char cmdelim; | |
119 | { | |
120 | int cmjust, col; | |
121 | register struct comment *cp; | |
122 | register struct commline *kp; | |
123 | ||
124 | incomm = 1; | |
125 | if (cmdelim == '*' && yycol == 10 || cmdelim == '{' && yycol == 9) | |
126 | cmjust = CLMARG; | |
127 | else if (yytokcnt <= 1) | |
128 | cmjust = CALIGN; | |
129 | else if (yywhcnt < 2) | |
130 | cmjust = CTRAIL; | |
131 | else | |
132 | cmjust = CRMARG; | |
133 | col = yycol - (cmdelim == '{' ? 1 : 2); | |
134 | cp = tree5(NIL, cmdelim, NIL, cmjust, yyseqid); | |
135 | cmeof = 0; | |
136 | do { | |
137 | kp = getcmline(cmdelim); | |
138 | if (cp->cml == NIL) { | |
139 | kp->cml = kp; | |
140 | kp->cmcol = col; | |
141 | } else { | |
142 | kp->cml = cp->cml->cml; | |
143 | cp->cml->cml = kp; | |
144 | switch (cp->cmjust) { | |
145 | case CTRAIL: | |
146 | case CRMARG: | |
147 | cp->cmjust = CALIGN; | |
148 | } | |
149 | } | |
150 | cp->cml = kp; | |
151 | } while (!cmeof); | |
152 | newcomm(cp); | |
153 | incomm = 0; | |
154 | } | |
155 | ||
156 | /* | |
157 | * Chain the new comment at "cp" onto the linked list of comments. | |
158 | */ | |
159 | newcomm(cp) | |
160 | register struct comment *cp; | |
161 | { | |
162 | ||
163 | if (cmhp == NIL) | |
164 | cp->cmnext = cp; | |
165 | else { | |
166 | cp->cmnext = cmhp->cmnext; | |
167 | cmhp->cmnext = cp; | |
168 | } | |
169 | cmhp = cp; | |
170 | } | |
171 | ||
172 | ||
173 | int nilcml[3]; | |
174 | ||
175 | quickcomm(t) | |
176 | int t; | |
177 | { | |
178 | ||
179 | if (incomm) | |
180 | return; | |
181 | newcomm(tree5(nilcml, NIL, NIL, t, yyseqid)); | |
182 | } | |
183 | ||
184 | commincl(cp, ch) | |
185 | char *cp, ch; | |
186 | { | |
187 | ||
188 | newcomm(tree5(nilcml, savestr(cp), ch, CINCLUD, yyseqid)); | |
189 | } | |
190 | ||
191 | getcmline(cmdelim) | |
192 | char cmdelim; | |
193 | { | |
194 | char lastc; | |
195 | register char *tp; | |
196 | register CHAR c; | |
197 | register struct commline *kp; | |
198 | ||
199 | c = readch(); | |
200 | kp = tree3(NIL, yycol, NIL); | |
201 | tp = token; | |
202 | lastc = 0; | |
203 | for (;;) { | |
204 | switch (c) { | |
205 | case '}': | |
206 | if (cmdelim == '{') | |
207 | goto endcm; | |
208 | break; | |
209 | case ')': | |
210 | if (cmdelim == '*' && lastc == '*') { | |
211 | --tp; | |
212 | goto endcm; | |
213 | } | |
214 | break; | |
215 | case '\n': | |
216 | goto done; | |
217 | case -1: | |
218 | yerror("Comment does not terminate - QUIT"); | |
219 | pexit(ERRS); | |
220 | } | |
221 | lastc = c; | |
222 | *tp++ = c; | |
223 | c = readch(); | |
224 | } | |
225 | endcm: | |
226 | cmeof++; | |
227 | done: | |
228 | *tp = 0; | |
229 | kp->cmtext = copystr(token); | |
230 | return (kp); | |
231 | } | |
232 | ||
233 | /* | |
234 | * Flush through the line this token is on. | |
235 | * Ignore if next token on same line as this one. | |
236 | */ | |
237 | putcml() | |
238 | { | |
239 | register int i, SSeqid, SCol; | |
240 | ||
241 | if (Seqid == LSeqid) | |
242 | return (1); | |
243 | SSeqid = Seqid, SCol = Col; | |
244 | Seqid = LSeqid, Col = 32767; | |
245 | i = putcm(); | |
246 | Seqid = SSeqid, Col = SCol; | |
247 | return (i); | |
248 | } | |
249 | ||
250 | /* | |
251 | * Flush to the beginning of the line this token is on. | |
252 | * Ignore if this token is on the same line as the previous one | |
253 | * (effectively since all such already then flushed.) | |
254 | */ | |
255 | putcmp() | |
256 | { | |
257 | register int i, SSeqid, SCol; | |
258 | ||
259 | SSeqid = Seqid, SCol = Col; | |
260 | Seqid = LSeqid, Col = 0; | |
261 | i = putcm(); | |
262 | Seqid = SSeqid, Col = SCol; | |
263 | return (i); | |
264 | } | |
265 | ||
266 | /* | |
267 | * Put out the comments to the border indicated by Seqid and Col | |
268 | */ | |
269 | putcm() | |
270 | { | |
271 | register struct comment *cp; | |
272 | register int i; | |
273 | ||
274 | cp = cmhp; | |
275 | if (cp == NIL) | |
276 | return (0); | |
277 | i = 0; | |
278 | cp = cp->cmnext; | |
279 | while (cp->cmseqid < Seqid || cp->cmseqid == Seqid && cp->cml->cmcol < Col) { | |
280 | putone(cp); | |
281 | i =| 1 << cp->cmjust; | |
282 | if (cp->cmnext == cp) { | |
283 | cmhp = NIL; | |
284 | break; | |
285 | } | |
286 | cp = cp->cmnext; | |
287 | cmhp->cmnext = cp; | |
288 | } | |
289 | return (i); | |
290 | } | |
291 | ||
292 | /* | |
293 | * Put out one comment. | |
294 | * Note that empty lines, form feeds and #include statements | |
295 | * are treated as comments are regurgitated here. | |
296 | */ | |
297 | putone(cp) | |
298 | register struct comment *cp; | |
299 | { | |
300 | register struct commline *cml, *cmf; | |
301 | ||
302 | align(cp); | |
303 | switch (cp->cmjust) { | |
304 | case CINCLUD: | |
305 | /* ppflush() */ | |
306 | if (noinclude == 0) { | |
307 | putchar('\f'); | |
308 | return; | |
309 | } | |
310 | printf("#include %c%s%c", cp->cml, cp->cmdelim, cp->cml); | |
311 | return; | |
312 | } | |
313 | if (stripcomm) | |
314 | return; | |
315 | switch (cp->cmjust) { | |
316 | case CFORM: | |
317 | ppop("\f"); | |
318 | ppnl(); | |
319 | case CNL: | |
320 | case CNLBL: | |
321 | return; | |
322 | } | |
323 | ppbra(cp->cmdelim == '{' ? "{" : "(*"); | |
324 | cmf = cp->cml->cml; | |
325 | ppid(cmf->cmtext); | |
326 | for (cml = cmf->cml; cml != cmf; cml = cml->cml) { | |
327 | align(cp); | |
328 | oneline(cmf->cmcol, cml); | |
329 | } | |
330 | ppket(cp->cmdelim == '{' ? "}" : "*)"); | |
331 | } | |
332 | ||
333 | /* | |
334 | * Do the preliminary horizontal and vertical | |
335 | * motions necessary before beginning a comment, | |
336 | * or between lines of a mult-line comment. | |
337 | */ | |
338 | align(cp) | |
339 | register struct comment *cp; | |
340 | { | |
341 | ||
342 | switch (cp->cmjust) { | |
343 | case CNL: | |
344 | ppsnl(); | |
345 | break; | |
346 | case CNLBL: | |
347 | ppsnlb(); | |
348 | break; | |
349 | case CFORM: | |
350 | case CINCLUD: | |
351 | ppnl(); | |
352 | break; | |
353 | case CLMARG: | |
354 | ppnl(); | |
355 | if (profile) | |
356 | ppid("\t"); | |
357 | break; | |
358 | case CALIGN: | |
359 | ppnl(); | |
360 | indent(); | |
361 | break; | |
362 | case CTRAIL: | |
363 | ppspac(); | |
364 | break; | |
365 | case CRMARG: | |
366 | case CSRMARG: | |
367 | pptab(); | |
368 | break; | |
369 | } | |
370 | } | |
371 | ||
372 | /* | |
373 | * One line of a multi-line comment | |
374 | * Deal with alignment and initial white space trimming. | |
375 | * The "margin" indicates where the first line of the | |
376 | * comment began... don't print stuff in this comment | |
377 | * which came before this. | |
378 | */ | |
379 | oneline(margin, cml) | |
380 | int margin; | |
381 | struct commline *cml; | |
382 | { | |
383 | register char *tp; | |
384 | register int i; | |
385 | ||
386 | for (i = 8, tp = cml->cmtext; i < margin && *tp; tp++) | |
387 | switch (*tp) { | |
388 | case ' ': | |
389 | i++; | |
390 | continue; | |
391 | case '\t': | |
392 | i =+ 8; | |
393 | i =& ~7; | |
394 | if (i < margin) | |
395 | continue; | |
396 | ppop("\t"); | |
397 | default: | |
398 | goto out; | |
399 | } | |
400 | out: | |
401 | ppid(tp); | |
402 | } | |
403 | ||
404 | /* | |
405 | * Flush all comments | |
406 | */ | |
407 | flushcm() | |
408 | { | |
409 | ||
410 | Seqid = 32767; | |
411 | return(putcm()); | |
412 | } | |
413 | ||
414 | #define BLANKS ((1 << CNL) | (1 << CNLBL) | (1 << CFORM)) | |
415 | noblank(i) | |
416 | int i; | |
417 | { | |
418 | ||
419 | return ((i & BLANKS) == 0); | |
420 | } | |
421 | ||
422 | int needform, neednlbl, neednl, needseqid; | |
423 | ||
424 | needtree() | |
425 | { | |
426 | register struct comment *cp; | |
427 | ||
428 | needform = neednlbl = neednl = 0; | |
429 | cp = cmhp; | |
430 | if (cp == NIL) | |
431 | return (0); | |
432 | do { | |
433 | switch (cp->cmjust) { | |
434 | case CNL: | |
435 | neednl++; | |
436 | goto seq; | |
437 | case CNLBL: | |
438 | neednlbl++; | |
439 | goto seq; | |
440 | case CFORM: | |
441 | needform++; | |
442 | seq: | |
443 | needseqid = cp->cmseqid; | |
444 | break; | |
445 | default: | |
446 | neednl = neednlbl = needform = 0; | |
447 | return (1); | |
448 | } | |
449 | cp = cp->cmnext; | |
450 | } while (cp != cmhp); | |
451 | cmhp = NIL; | |
452 | return (0); | |
453 | } | |
454 | ||
455 | packtree() | |
456 | { | |
457 | int save; | |
458 | ||
459 | save = yyseqid; | |
460 | yyseqid = needseqid; | |
461 | for (; needform > 0; needform--) | |
462 | commform(); | |
463 | for (; neednl > 0; neednl--) | |
464 | commnl(); | |
465 | for (; neednlbl > 0; neednlbl--) | |
466 | commnlbl(); | |
467 | yyseqid = save; | |
468 | } |