| 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 | } |