1 #include <u.h> 2 #include <libc.h> 3 #include <bio.h> 4 #include "plot.h" 5 #include <draw.h> 6 #include <event.h> 7 8 void define(char*); 9 void call(char*); 10 void include(char*); 11 int process(Biobuf*); 12 int server(void); 13 14 enum{ 15 ARC, 16 BOX, 17 CALL, 18 CFILL, 19 CIRC, 20 CLOSEPL, 21 COLOR, 22 CSPLINE, 23 DEFINE, 24 DISK, 25 DSPLINE, 26 ERASE, 27 FILL, 28 FRAME, 29 FSPLINE, 30 GRADE, 31 IDLE, 32 INCLUDE, 33 LINE, 34 LSPLINE, 35 MOVE, 36 OPENPL, 37 PARABOLA, 38 PEN, 39 PAUSE, 40 POINT, 41 POLY, 42 RANGE, 43 RESTORE, 44 RMOVE, 45 RVEC, 46 SAVE, 47 SBOX, 48 SPLINE, 49 TEXT, 50 VEC, 51 LAST 52 }; 53 54 struct pcall { 55 char *cc; 56 int numc; 57 } plots[] = { 58 [ARC] "a", 1, 59 [BOX] "bo", 2, 60 [CALL] "ca", 2, 61 [CFILL] "cf", 2, 62 [CIRC] "ci", 2, 63 [CLOSEPL] "cl", 2, 64 [COLOR] "co", 2, 65 [CSPLINE] "cs", 2, 66 [DEFINE] "de", 2, 67 [DISK] "di", 2, 68 [DSPLINE] "ds", 2, 69 [ERASE] "e", 1, 70 [FILL] "fi", 2, 71 [FRAME] "fr", 2, 72 [FSPLINE] "fs", 2, 73 [GRADE] "g", 1, 74 [IDLE] "id", 2, 75 [INCLUDE] "in", 2, 76 [LINE] "li", 2, 77 [LSPLINE] "ls", 2, 78 [MOVE] "m", 1, 79 [OPENPL] "o", 1, 80 [PARABOLA] "par", 3, 81 [PEN] "pe", 2, 82 [PAUSE] "pau", 3, 83 [POINT] "poi", 3, 84 [POLY] "pol", 3, 85 [RANGE] "ra", 2, 86 [RESTORE] "re", 2, 87 [RMOVE] "rm", 2, 88 [RVEC] "rv", 2, 89 [SAVE] "sa", 2, 90 [SBOX] "sb", 2, 91 [SPLINE] "sp", 2, 92 [TEXT] "t", 1, 93 [VEC] "v", 1, 94 [LAST] 0, 0, 95 }; 96 97 struct pcall *pplots; /* last command read */ 98 99 #define MAXL 16 100 struct fcall { 101 char *name; 102 char *stash; 103 } flibr[MAXL]; /* define strings */ 104 105 struct fcall *fptr = flibr; 106 107 #define NFSTACK 50 108 struct fstack{ 109 int peekc; 110 int lineno; 111 char *corebuf; 112 Biobuf *fd; 113 double scale; 114 }fstack[NFSTACK]; /* stack of open input files & defines */ 115 struct fstack *fsp=fstack; 116 117 #define NARGSTR 8192 118 char argstr[NARGSTR+1]; /* string arguments */ 119 120 #define NX 8192 121 double x[NX]; /* numeric arguments */ 122 123 #define NPTS 256 124 int cnt[NPTS]; /* control-polygon vertex counts */ 125 double *pts[NPTS]; /* control-polygon vertex pointers */ 126 127 void eresized(int new){ 128 if(new && getwindow(display, Refnone) < 0){ 129 fprint(2, "Can't reattach to window: %r\n"); 130 exits("resize"); 131 } 132 } 133 char *items[]={ 134 "exit", 135 0 136 }; 137 Menu menu={items}; 138 void 139 main(int arc, char *arv[]){ 140 char *ap; 141 Biobuf *bp; 142 int fd; 143 int i; 144 int dflag; 145 char *oflag; 146 Mouse m; 147 bp = 0; 148 fd = dup(0, -1); /* because openpl will close 0! */ 149 dflag=0; 150 oflag=""; 151 for(i=1;i!=arc;i++) if(arv[i][0]=='-') switch(arv[i][1]){ 152 case 'd': dflag=1; break; 153 case 'o': oflag=arv[i]+2; break; 154 case 's': fd=server(); break; 155 } 156 openpl(oflag); 157 if(dflag) doublebuffer(); 158 for (; arc > 1; arc--, arv++) { 159 if (arv[1][0] == '-') { 160 ap = arv[1]; 161 ap++; 162 switch (*ap) { 163 default: 164 fprint(2, "%s not allowed as argument\n", ap); 165 exits("usage"); 166 case 'T': break; 167 case 'D': break; 168 case 'd': break; 169 case 'o': break; 170 case 'W': break; 171 case 's': break; 172 case 'e': erase(); break; 173 case 'C': closepl(); break; 174 case 'w': ppause(); break; 175 case 'c': color(ap+1); break; 176 case 'f': cfill(ap+1); break; 177 case 'p': pen(ap+1); break; 178 case 'g': grade(atof(ap+1)); break; 179 } 180 } 181 else if ((bp = Bopen(arv[1], OREAD)) == 0) { 182 perror(arv[1]); 183 fprint(2, "Cannot find file %s\n", arv[1]); 184 } 185 else if(process(bp)) Bterm(fsp->fd); 186 else break; 187 } 188 if (bp == 0){ 189 bp = malloc(sizeof *bp); 190 Binit(bp, fd, OREAD); 191 process(bp); 192 } 193 closepl(); 194 for(;;){ 195 m=emouse(); 196 if(m.buttons&4 && emenuhit(3, &m, &menu)==0) exits(0); 197 } 198 } 199 int isalpha(int c) 200 { 201 return ('a'<=c && c<='z') || ('A'<=c && c<='Z'); 202 } 203 int isupper(int c) 204 { 205 return 'A'<=c && c<='Z'; 206 } 207 int isdigit(int c) 208 { 209 return '0'<=c && c<='9'; 210 } 211 int ispunct(int c) 212 { 213 return strchr("!\"#$%&'()*+,-./:;<=>?@[\]^_`{|}~", c)!=0; 214 } 215 int isspace(int c) 216 { 217 return strchr(" \t\n\v\f\r", c)!=0; 218 } 219 int nextc(void){ 220 int c; 221 Rune r; 222 for(;;){ 223 if(fsp->peekc!=Beof){ 224 c=fsp->peekc; 225 fsp->peekc=Beof; 226 return c; 227 } 228 if(fsp->fd) 229 c=Bgetrune(fsp->fd); 230 else if(*fsp->corebuf){ 231 fsp->corebuf+=chartorune(&r, fsp->corebuf); 232 c=r; 233 }else 234 c=Beof; 235 if(c!=Beof || fsp==fstack) break; 236 if(fsp->fd) Bterm(fsp->fd); 237 --fsp; 238 } 239 if(c=='\n') fsp->lineno++; 240 return c; 241 } 242 /* 243 * Read a string into argstr -- ignores leading spaces 244 * and an optional leading quote-mark 245 */ 246 void 247 strarg(void){ 248 int c; 249 Rune r; 250 int quote=0; 251 char *s=argstr; 252 do 253 c=nextc(); 254 while(c==' ' || c=='\t'); 255 if(c=='\'' || c=='"'){ 256 quote=c; 257 c=nextc(); 258 } 259 r = 0; 260 while(c!='\n' && c!=Beof){ 261 r=c; 262 s+=runetochar(s, &r); 263 c=nextc(); 264 } 265 if(quote && s!=argstr && r==quote) --s; 266 *s='\0'; 267 } 268 /* 269 * Read a floating point number into argstr 270 */ 271 numstring(void){ 272 int ndp=0; 273 int ndig=0; 274 char *s=argstr; 275 int c=nextc(); 276 if(c=='+' || c=='-'){ 277 *s++=c; 278 c=nextc(); 279 } 280 while(isdigit(c) || c=='.'){ 281 if(s!=&argstr[NARGSTR]) *s++=c; 282 if(c=='.') ndp++; 283 else ndig++; 284 c=nextc(); 285 } 286 if(ndp>1 || ndig==0){ 287 fsp->peekc=c; 288 return 0; 289 } 290 if(c=='e' || c=='E'){ 291 if(s!=&argstr[NARGSTR]) *s++=c; 292 c=nextc(); 293 if(c=='+' || c=='-'){ 294 if(s!=&argstr[NARGSTR]) *s++=c; 295 c=nextc(); 296 } 297 if(!isdigit(c)){ 298 fsp->peekc=c; 299 return 0; 300 } 301 while(isdigit(c)){ 302 if(s!=&argstr[NARGSTR]) *s++=c; 303 c=nextc(); 304 } 305 } 306 fsp->peekc=c; 307 *s='\0'; 308 return 1; 309 } 310 /* 311 * Read n numeric arguments, storing them in 312 * x[0], ..., x[n-1] 313 */ 314 void 315 numargs(int n){ 316 int i, c; 317 for(i=0;i!=n;i++){ 318 do{ 319 c=nextc(); 320 }while(strchr(" \t\n", c) || c!='.' && c!='+' && c!='-' && ispunct(c)); 321 fsp->peekc=c; 322 if(!numstring()){ 323 fprint(2, "line %d: number expected\n", fsp->lineno); 324 exits("input error"); 325 } 326 x[i]=atof(argstr)*fsp->scale; 327 } 328 } 329 /* 330 * Read a list of lists of control vertices, storing points in x[.], 331 * pointers in pts[.] and counts in cnt[.] 332 */ 333 void 334 polyarg(void){ 335 int nleft, l, r, c; 336 double **ptsp=pts, *xp=x; 337 int *cntp=cnt; 338 do{ 339 c=nextc(); 340 }while(c==' ' || c=='\t'); 341 if(c=='{'){ 342 l='{'; 343 r='}'; 344 } 345 else{ 346 l=r='\n'; 347 fsp->peekc=c; 348 } 349 nleft=1; 350 *cntp=0; 351 *ptsp=xp; 352 for(;;){ 353 c=nextc(); 354 if(c==r){ 355 if(*cntp){ 356 if(*cntp&1){ 357 fprint(2, "line %d: phase error\n", 358 fsp->lineno); 359 exits("bad input"); 360 } 361 *cntp/=2; 362 if(ptsp==&pts[NPTS]){ 363 fprint(2, "line %d: out of polygons\n", 364 fsp->lineno); 365 exits("exceeded limit"); 366 } 367 *++ptsp=xp; 368 *++cntp=0; 369 } 370 if(--nleft==0) return; 371 } 372 else switch(c){ 373 case Beof: return; 374 case ' ': break; 375 case '\t': break; 376 case '\n': break; 377 case '.': case '+': case '-': 378 case '0': case '1': case '2': case '3': case '4': 379 case '5': case '6': case '7': case '8': case '9': 380 fsp->peekc=c; 381 if(!numstring()){ 382 fprint(2, "line %d: expected number\n", fsp->lineno); 383 exits("bad input"); 384 } 385 if(xp==&x[NX]){ 386 fprint(2, "line %d: out of space\n", fsp->lineno); 387 exits("exceeded limit"); 388 } 389 *xp++=atof(argstr); 390 ++*cntp; 391 break; 392 default: 393 if(c==l) nleft++; 394 else if(!ispunct(c)){ 395 fsp->peekc=c; 396 return; 397 } 398 } 399 } 400 } 401 402 process(Biobuf *fd){ 403 char *s; 404 int c; 405 fsp=fstack; 406 fsp->fd=fd; 407 fsp->corebuf=0; 408 fsp->peekc=Beof; 409 fsp->lineno=1; 410 fsp->scale=1.; 411 for(;;){ 412 do 413 c=nextc(); 414 while(c==' ' || c=='\t'); 415 if(c==':'){ 416 do 417 c=nextc(); 418 while(c!='\n' && c!=Beof); 419 if(c==Beof) break; 420 continue; 421 } 422 while(c=='.'){ 423 c=nextc(); 424 if(isdigit(c)){ 425 if(fsp->fd) Bungetc(fsp->fd); 426 else --fsp->corebuf; 427 c='.'; 428 break; 429 } 430 } 431 if(c==Beof) break; 432 if(c=='\n') continue; 433 if(isalpha(c)){ 434 s=argstr; 435 do{ 436 if(isupper(c)) c=tolower(c); 437 if(s!=&argstr[NARGSTR]) *s++=c; 438 c=nextc(); 439 }while(isalpha(c)); 440 fsp->peekc=c; 441 *s='\0'; 442 for(pplots=plots;pplots->cc;pplots++) 443 if(strncmp(argstr, pplots->cc, pplots->numc)==0) 444 break; 445 if(pplots->cc==0){ 446 fprint(2, "line %d, %s unknown\n", fsp->lineno, 447 argstr); 448 exits("bad command"); 449 } 450 } 451 else{ 452 fsp->peekc=c; 453 } 454 if(!pplots){ 455 fprint(2, "line %d, no command!\n", fsp->lineno); 456 exits("no command"); 457 } 458 switch(pplots-plots){ 459 case ARC: numargs(7); rarc(x[0],x[1],x[2],x[3],x[4],x[5],x[6]); break; 460 case BOX: numargs(4); box(x[0], x[1], x[2], x[3]); break; 461 case CALL: strarg(); call(argstr); pplots=0; break; 462 case CFILL: strarg(); cfill(argstr); pplots=0; break; 463 case CIRC: numargs(3); circ(x[0], x[1], x[2]); break; 464 case CLOSEPL: strarg(); closepl(); pplots=0; break; 465 case COLOR: strarg(); color(argstr); pplots=0; break; 466 case CSPLINE: polyarg(); splin(4, cnt, pts); break; 467 case DEFINE: strarg(); define(argstr); pplots=0; break; 468 case DISK: numargs(3); plotdisc(x[0], x[1], x[2]); break; 469 case DSPLINE: polyarg(); splin(3, cnt, pts); break; 470 case ERASE: strarg(); erase(); pplots=0; break; 471 case FILL: polyarg(); fill(cnt, pts); break; 472 case FRAME: numargs(4); frame(x[0], x[1], x[2], x[3]); break; 473 case FSPLINE: polyarg(); splin(1, cnt, pts); break; 474 case GRADE: numargs(1); grade(x[0]); break; 475 case IDLE: strarg(); idle(); pplots=0; break; 476 case INCLUDE: strarg(); include(argstr); pplots=0; break; 477 case LINE: numargs(4); plotline(x[0], x[1], x[2], x[3]); break; 478 case LSPLINE: polyarg(); splin(2, cnt, pts); break; 479 case MOVE: numargs(2); move(x[0], x[1]); break; 480 case OPENPL: strarg(); openpl(argstr); pplots=0; break; 481 case PARABOLA: numargs(6); parabola(x[0],x[1],x[2],x[3],x[4],x[5]); break; 482 case PAUSE: strarg(); ppause(); pplots=0; break; 483 case PEN: strarg(); pen(argstr); pplots=0; break; 484 case POINT: numargs(2); dpoint(x[0], x[1]); break; 485 case POLY: polyarg(); plotpoly(cnt, pts); break; 486 case RANGE: numargs(4); range(x[0], x[1], x[2], x[3]); break; 487 case RESTORE: strarg(); restore(); pplots=0; break; 488 case RMOVE: numargs(2); rmove(x[0], x[1]); break; 489 case RVEC: numargs(2); rvec(x[0], x[1]); break; 490 case SAVE: strarg(); save(); pplots=0; break; 491 case SBOX: numargs(4); sbox(x[0], x[1], x[2], x[3]); break; 492 case SPLINE: polyarg(); splin(0, cnt, pts); break; 493 case TEXT: strarg(); text(argstr); pplots=0; break; 494 case VEC: numargs(2); vec(x[0], x[1]); break; 495 default: 496 fprint(2, "plot: missing case %ld\n", pplots-plots); 497 exits("internal error"); 498 } 499 } 500 return 1; 501 } 502 char *names = 0; 503 char *enames = 0; 504 char *bstash = 0; 505 char *estash = 0; 506 unsigned size = 1024; 507 char *nstash = 0; 508 void define(char *a){ 509 char *ap; 510 short i, j; 511 int curly = 0; 512 ap = a; 513 while(isalpha(*ap))ap++; 514 if(ap == a){ 515 fprint(2,"no name with define\n"); 516 exits("define"); 517 } 518 i = ap - a; 519 if(names+i+1 > enames){ 520 names = malloc((unsigned)512); 521 enames = names + 512; 522 } 523 fptr->name = names; 524 strncpy(names, a,i); 525 names += i; 526 *names++ = '\0'; 527 if(!bstash){ 528 bstash = nstash = malloc(size); 529 estash = bstash + size; 530 } 531 fptr->stash = nstash; 532 while(*ap != '{') 533 if(*ap == '\n'){ 534 if((ap=Brdline(fsp->fd, '\n'))==0){ 535 fprint(2,"unexpected end of file\n"); 536 exits("eof"); 537 } 538 } 539 else ap++; 540 while((j=Bgetc(fsp->fd))!= Beof){ 541 if(j == '{')curly++; 542 else if(j == '}'){ 543 if(curly == 0)break; 544 else curly--; 545 } 546 *nstash++ = j; 547 if(nstash == estash){ 548 free(bstash); 549 size += 1024; 550 bstash = realloc(bstash,size); 551 estash = bstash+size; 552 } 553 } 554 *nstash++ = '\0'; 555 if(fptr++ >= &flibr[MAXL]){ 556 fprint(2,"Too many objects\n"); 557 exits("too many objects"); 558 } 559 } 560 void call(char *a){ 561 char *ap; 562 struct fcall *f; 563 char sav; 564 double SC; 565 ap = a; 566 while(isalpha(*ap))ap++; 567 sav = *ap; 568 *ap = '\0'; 569 for(f=flibr;f<fptr;f++){ 570 if (!(strcmp(a, f->name))) 571 break; 572 } 573 if(f == fptr){ 574 fprint(2, "object %s not defined\n",a); 575 exits("undefined"); 576 } 577 *ap = sav; 578 while (isspace(*ap) || *ap == ',') 579 ap++; 580 if (*ap != '\0') 581 SC = atof(ap); 582 else SC = 1.; 583 if(++fsp==&fstack[NFSTACK]){ 584 fprint(2, "input stack overflow\n"); 585 exits("blew stack"); 586 } 587 fsp->peekc=Beof; 588 fsp->lineno=1; 589 fsp->corebuf=f->stash; 590 fsp->fd=0; 591 fsp->scale=fsp[-1].scale*SC; 592 } 593 void include(char *a){ 594 Biobuf *fd; 595 fd=Bopen(a, OREAD); 596 if(fd==0){ 597 perror(a); 598 exits("can't include"); 599 } 600 if(++fsp==&fstack[NFSTACK]){ 601 fprint(2, "input stack overflow\n"); 602 exits("blew stack"); 603 } 604 fsp->peekc=Beof; 605 fsp->lineno=1; 606 fsp->corebuf=0; 607 fsp->fd=fd; 608 } 609 /* 610 * Doesn't work. Why? 611 */ 612 int server(void){ 613 int fd, p[2]; 614 char buf[32]; 615 pipe(p); 616 fd = create("/srv/plot", 1, 0666); 617 sprint(buf, "%d", p[1]); 618 write(fd, buf, strlen(buf)); 619 close(fd); 620 close(p[1]); 621 return p[0]; 622 } 623