1 /*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Steve Hayman of the Computer Science Department, Indiana University, 7 * Michiro Hikida and David Goodenough. 8 * 9 * %sccs.include.redist.c% 10 */ 11 12 #ifndef lint 13 static char copyright[] = 14 "@(#) Copyright (c) 1991, 1993\n\ 15 The Regents of the University of California. All rights reserved.\n"; 16 #endif /* not lint */ 17 18 #ifndef lint 19 static char sccsid[] = "@(#)join.c 8.2 (Berkeley) 01/03/94"; 20 #endif /* not lint */ 21 22 #include <sys/param.h> 23 24 #include <ctype.h> 25 #include <errno.h> 26 #include <stdio.h> 27 #include <stdlib.h> 28 #include <string.h> 29 30 /* 31 * There's a structure per input file which encapsulates the state of the 32 * file. We repeatedly read lines from each file until we've read in all 33 * the consecutive lines from the file with a common join field. Then we 34 * compare the set of lines with an equivalent set from the other file. 35 */ 36 typedef struct { 37 char *line; /* line */ 38 u_long linealloc; /* line allocated count */ 39 char **fields; /* line field(s) */ 40 u_long fieldcnt; /* line field(s) count */ 41 u_long fieldalloc; /* line field(s) allocated count */ 42 } LINE; 43 44 typedef struct { 45 FILE *fp; /* file descriptor */ 46 u_long joinf; /* join field (-1, -2, -j) */ 47 int unpair; /* output unpairable lines (-a) */ 48 int number; /* 1 for file 1, 2 for file 2 */ 49 50 LINE *set; /* set of lines with same field */ 51 int pushbool; /* if pushback is set */ 52 u_long pushback; /* line on the stack */ 53 u_long setcnt; /* set count */ 54 u_long setalloc; /* set allocated count */ 55 } INPUT; 56 INPUT input1 = { NULL, 0, 0, 1, NULL, 0, 0, 0, }, 57 input2 = { NULL, 0, 0, 2, NULL, 0, 0, 0, }; 58 59 typedef struct { 60 u_long filenum; /* file number */ 61 u_long fieldno; /* field number */ 62 } OLIST; 63 OLIST *olist; /* output field list */ 64 u_long olistcnt; /* output field list count */ 65 u_long olistalloc; /* output field allocated count */ 66 67 int joinout = 1; /* show lines with matched join fields (-v) */ 68 int needsep; /* need separator character */ 69 int showusage = 1; /* show usage for usage err() calls */ 70 int spans = 1; /* span multiple delimiters (-t) */ 71 char *empty; /* empty field replacement string (-e) */ 72 char *tabchar = " \t"; /* delimiter characters (-t) */ 73 74 int cmp __P((LINE *, u_long, LINE *, u_long)); 75 void enomem __P((void)); 76 void err __P((const char *, ...)); 77 void fieldarg __P((char *)); 78 void joinlines __P((INPUT *, INPUT *)); 79 void obsolete __P((char **)); 80 void outfield __P((LINE *, u_long)); 81 void outoneline __P((INPUT *, LINE *)); 82 void outtwoline __P((INPUT *, LINE *, INPUT *, LINE *)); 83 void slurp __P((INPUT *)); 84 void usage __P((void)); 85 86 int 87 main(argc, argv) 88 int argc; 89 char *argv[]; 90 { 91 register INPUT *F1, *F2; 92 int aflag, ch, cval, vflag; 93 char *end; 94 95 F1 = &input1; 96 F2 = &input2; 97 98 aflag = vflag = 0; 99 obsolete(argv); 100 while ((ch = getopt(argc, argv, "\01a:e:j:1:2:o:t:v:")) != EOF) { 101 switch (ch) { 102 case '\01': 103 aflag = 1; 104 F1->unpair = F2->unpair = 1; 105 break; 106 case '1': 107 if ((F1->joinf = strtol(optarg, &end, 10)) < 1) 108 err("-1 option field number less than 1"); 109 if (*end) 110 err("illegal field number -- %s", optarg); 111 --F1->joinf; 112 break; 113 case '2': 114 if ((F2->joinf = strtol(optarg, &end, 10)) < 1) 115 err("-2 option field number less than 1"); 116 if (*end) 117 err("illegal field number -- %s", optarg); 118 --F2->joinf; 119 break; 120 case 'a': 121 aflag = 1; 122 switch(strtol(optarg, &end, 10)) { 123 case 1: 124 F1->unpair = 1; 125 break; 126 case 2: 127 F2->unpair = 1; 128 break; 129 default: 130 err("-a option file number not 1 or 2"); 131 break; 132 } 133 if (*end) 134 err("illegal file number -- %s", optarg); 135 break; 136 case 'e': 137 empty = optarg; 138 break; 139 case 'j': 140 if ((F1->joinf = F2->joinf = 141 strtol(optarg, &end, 10)) < 1) 142 err("-j option field number less than 1"); 143 if (*end) 144 err("illegal field number -- %s", optarg); 145 --F1->joinf; 146 --F2->joinf; 147 break; 148 case 'o': 149 fieldarg(optarg); 150 break; 151 case 't': 152 spans = 0; 153 if (strlen(tabchar = optarg) != 1) 154 err("illegal tab character specification"); 155 break; 156 case 'v': 157 vflag = 1; 158 joinout = 0; 159 switch(strtol(optarg, &end, 10)) { 160 case 1: 161 F1->unpair = 1; 162 break; 163 case 2: 164 F2->unpair = 1; 165 break; 166 default: 167 err("-v option file number not 1 or 2"); 168 break; 169 } 170 if (*end) 171 err("illegal file number -- %s", optarg); 172 break; 173 case '?': 174 default: 175 usage(); 176 } 177 } 178 argc -= optind; 179 argv += optind; 180 181 if (aflag && vflag) 182 err("-a and -v options mutually exclusive"); 183 184 if (argc != 2) 185 usage(); 186 showusage = 0; 187 188 /* Open the files; "-" means stdin. */ 189 if (!strcmp(*argv, "-")) 190 F1->fp = stdin; 191 else if ((F1->fp = fopen(*argv, "r")) == NULL) 192 err("%s: %s", *argv, strerror(errno)); 193 ++argv; 194 if (!strcmp(*argv, "-")) 195 F2->fp = stdin; 196 else if ((F2->fp = fopen(*argv, "r")) == NULL) 197 err("%s: %s", *argv, strerror(errno)); 198 if (F1->fp == stdin && F2->fp == stdin) 199 err("only one input file may be stdin"); 200 201 slurp(F1); 202 slurp(F2); 203 while (F1->setcnt && F2->setcnt) { 204 cval = cmp(F1->set, F1->joinf, F2->set, F2->joinf); 205 if (cval == 0) { 206 /* Oh joy, oh rapture, oh beauty divine! */ 207 if (joinout) 208 joinlines(F1, F2); 209 slurp(F1); 210 slurp(F2); 211 } else if (cval < 0) { 212 /* File 1 takes the lead... */ 213 if (F1->unpair) 214 joinlines(F1, NULL); 215 slurp(F1); 216 } else { 217 /* File 2 takes the lead... */ 218 if (F2->unpair) 219 joinlines(F2, NULL); 220 slurp(F2); 221 } 222 } 223 224 /* 225 * Now that one of the files is used up, optionally output any 226 * remaining lines from the other file. 227 */ 228 if (F1->unpair) 229 while (F1->setcnt) { 230 joinlines(F1, NULL); 231 slurp(F1); 232 } 233 if (F2->unpair) 234 while (F2->setcnt) { 235 joinlines(F2, NULL); 236 slurp(F2); 237 } 238 exit(0); 239 } 240 241 void 242 slurp(F) 243 INPUT *F; 244 { 245 register LINE *lp, *lastlp; 246 LINE tmp; 247 size_t len; 248 int cnt; 249 char *bp, *fieldp; 250 251 /* 252 * Read all of the lines from an input file that have the same 253 * join field. 254 */ 255 F->setcnt = 0; 256 for (lastlp = NULL;; ++F->setcnt, lastlp = lp) { 257 /* 258 * If we're out of space to hold line structures, allocate 259 * more. Initialize the structure so that we know that this 260 * is new space. 261 */ 262 if (F->setcnt == F->setalloc) { 263 cnt = F->setalloc; 264 F->setalloc += 50; 265 if ((F->set = realloc(F->set, 266 F->setalloc * sizeof(LINE))) == NULL) 267 enomem(); 268 bzero(F->set + cnt, 50 * sizeof(LINE)); 269 } 270 271 /* 272 * Get any pushed back line, else get the next line. Allocate 273 * space as necessary. If taking the line from the stack swap 274 * the two structures so that we don't lose space allocated to 275 * either structure. This could be avoided by doing another 276 * level of indirection, but it's probably okay as is. 277 * but it's probably okay as is. 278 */ 279 lp = &F->set[F->setcnt]; 280 if (F->pushbool) { 281 tmp = F->set[F->setcnt]; 282 F->set[F->setcnt] = F->set[F->pushback]; 283 F->set[F->pushback] = tmp; 284 F->pushbool = 0; 285 continue; 286 } 287 if ((bp = fgetln(F->fp, &len)) == NULL) 288 return; 289 if (lp->linealloc <= len + 1) { 290 lp->linealloc += MAX(100, len + 1); 291 if ((lp->line = 292 realloc(lp->line, lp->linealloc)) == NULL) 293 enomem(); 294 } 295 bcopy(bp, lp->line, len); 296 297 /* Replace trailing newline, if it exists. */ 298 if (bp[len - 1] == '\n') 299 lp->line[len - 1] = '\0'; 300 else 301 lp->line[len] = '\0'; 302 bp = lp->line; 303 304 /* Split the line into fields, allocate space as necessary. */ 305 lp->fieldcnt = 0; 306 while ((fieldp = strsep(&bp, tabchar)) != NULL) { 307 if (spans && *fieldp == '\0') 308 continue; 309 if (lp->fieldcnt == lp->fieldalloc) { 310 lp->fieldalloc += 50; 311 if ((lp->fields = realloc(lp->fields, 312 lp->fieldalloc * sizeof(char *))) == NULL) 313 enomem(); 314 } 315 lp->fields[lp->fieldcnt++] = fieldp; 316 } 317 318 /* See if the join field value has changed. */ 319 if (lastlp != NULL && cmp(lp, F->joinf, lastlp, F->joinf)) { 320 F->pushbool = 1; 321 F->pushback = F->setcnt; 322 break; 323 } 324 } 325 } 326 327 int 328 cmp(lp1, fieldno1, lp2, fieldno2) 329 LINE *lp1, *lp2; 330 u_long fieldno1, fieldno2; 331 { 332 if (lp1->fieldcnt < fieldno1) 333 return (lp2->fieldcnt < fieldno2 ? 0 : 1); 334 if (lp2->fieldcnt < fieldno2) 335 return (-1); 336 return (strcmp(lp1->fields[fieldno1], lp2->fields[fieldno2])); 337 } 338 339 void 340 joinlines(F1, F2) 341 register INPUT *F1, *F2; 342 { 343 register int cnt1, cnt2; 344 345 /* 346 * Output the results of a join comparison. The output may be from 347 * either file 1 or file 2 (in which case the first argument is the 348 * file from which to output) or from both. 349 */ 350 if (F2 == NULL) { 351 for (cnt1 = 0; cnt1 < F1->setcnt; ++cnt1) 352 outoneline(F1, &F1->set[cnt1]); 353 return; 354 } 355 for (cnt1 = 0; cnt1 < F1->setcnt; ++cnt1) 356 for (cnt2 = 0; cnt2 < F2->setcnt; ++cnt2) 357 outtwoline(F1, &F1->set[cnt1], F2, &F2->set[cnt2]); 358 } 359 360 void 361 outoneline(F, lp) 362 INPUT *F; 363 register LINE *lp; 364 { 365 register int cnt; 366 367 /* 368 * Output a single line from one of the files, according to the 369 * join rules. This happens when we are writing unmatched single 370 * lines. Output empty fields in the right places. 371 */ 372 if (olist) 373 for (cnt = 0; cnt < olistcnt; ++cnt) { 374 if (olist[cnt].filenum == F->number) 375 outfield(lp, olist[cnt].fieldno); 376 } 377 else 378 for (cnt = 0; cnt < lp->fieldcnt; ++cnt) 379 outfield(lp, cnt); 380 (void)printf("\n"); 381 if (ferror(stdout)) 382 err("stdout: %s", strerror(errno)); 383 needsep = 0; 384 } 385 386 void 387 outtwoline(F1, lp1, F2, lp2) 388 register INPUT *F1, *F2; 389 register LINE *lp1, *lp2; 390 { 391 register int cnt; 392 393 /* Output a pair of lines according to the join list (if any). */ 394 if (olist) 395 for (cnt = 0; cnt < olistcnt; ++cnt) 396 if (olist[cnt].filenum == 1) 397 outfield(lp1, olist[cnt].fieldno); 398 else /* if (olist[cnt].filenum == 2) */ 399 outfield(lp2, olist[cnt].fieldno); 400 else { 401 /* 402 * Output the join field, then the remaining fields from F1 403 * and F2. 404 */ 405 outfield(lp1, F1->joinf); 406 for (cnt = 0; cnt < lp1->fieldcnt; ++cnt) 407 if (F1->joinf != cnt) 408 outfield(lp1, cnt); 409 for (cnt = 0; cnt < lp2->fieldcnt; ++cnt) 410 if (F2->joinf != cnt) 411 outfield(lp2, cnt); 412 } 413 (void)printf("\n"); 414 if (ferror(stdout)) 415 err("stdout: %s", strerror(errno)); 416 needsep = 0; 417 } 418 419 void 420 outfield(lp, fieldno) 421 LINE *lp; 422 u_long fieldno; 423 { 424 if (needsep++) 425 (void)printf("%c", *tabchar); 426 if (!ferror(stdout)) 427 if (lp->fieldcnt < fieldno) { 428 if (empty != NULL) 429 (void)printf("%s", empty); 430 } else { 431 if (*lp->fields[fieldno] == '\0') 432 return; 433 (void)printf("%s", lp->fields[fieldno]); 434 } 435 if (ferror(stdout)) 436 err("stdout: %s", strerror(errno)); 437 } 438 439 /* 440 * Convert an output list argument "2.1, 1.3, 2.4" into an array of output 441 * fields. 442 */ 443 void 444 fieldarg(option) 445 char *option; 446 { 447 u_long fieldno; 448 char *end, *token; 449 450 while ((token = strsep(&option, " \t")) != NULL) { 451 if (*token == '\0') 452 continue; 453 if (token[0] != '1' && token[0] != '2' || token[1] != '.') 454 err("malformed -o option field"); 455 fieldno = strtol(token + 2, &end, 10); 456 if (*end) 457 err("malformed -o option field"); 458 if (fieldno == 0) 459 err("field numbers are 1 based"); 460 if (olistcnt == olistalloc) { 461 olistalloc += 50; 462 if ((olist = realloc(olist, 463 olistalloc * sizeof(OLIST))) == NULL) 464 enomem(); 465 } 466 olist[olistcnt].filenum = token[0] - '0'; 467 olist[olistcnt].fieldno = fieldno - 1; 468 ++olistcnt; 469 } 470 } 471 472 void 473 obsolete(argv) 474 char **argv; 475 { 476 int len; 477 char **p, *ap, *t; 478 479 while (ap = *++argv) { 480 /* Return if "--". */ 481 if (ap[0] == '-' && ap[1] == '-') 482 return; 483 switch (ap[1]) { 484 case 'a': 485 /* 486 * The original join allowed "-a", which meant the 487 * same as -a1 plus -a2. POSIX 1003.2, Draft 11.2 488 * only specifies this as "-a 1" and "a -2", so we 489 * have to use another option flag, one that is 490 * unlikely to ever be used or accidentally entered 491 * on the command line. (Well, we could reallocate 492 * the argv array, but that hardly seems worthwhile.) 493 */ 494 if (ap[2] == '\0') 495 ap[1] = '\01'; 496 break; 497 case 'j': 498 /* 499 * The original join allowed "-j[12] arg" and "-j arg". 500 * Convert the former to "-[12] arg". Don't convert 501 * the latter since getopt(3) can handle it. 502 */ 503 switch(ap[2]) { 504 case '1': 505 if (ap[3] != '\0') 506 goto jbad; 507 ap[1] = '1'; 508 ap[2] = '\0'; 509 break; 510 case '2': 511 if (ap[3] != '\0') 512 goto jbad; 513 ap[1] = '2'; 514 ap[2] = '\0'; 515 break; 516 case '\0': 517 break; 518 default: 519 jbad: err("illegal option -- %s", ap); 520 usage(); 521 } 522 break; 523 case 'o': 524 /* 525 * The original join allowed "-o arg arg". Convert to 526 * "-o arg -o arg". 527 */ 528 if (ap[2] != '\0') 529 break; 530 for (p = argv + 2; *p; ++p) { 531 if (p[0][0] != '1' && p[0][0] != '2' || 532 p[0][1] != '.') 533 break; 534 len = strlen(*p); 535 if (len - 2 != strspn(*p + 2, "0123456789")) 536 break; 537 if ((t = malloc(len + 3)) == NULL) 538 enomem(); 539 t[0] = '-'; 540 t[1] = 'o'; 541 bcopy(*p, t + 2, len + 1); 542 *p = t; 543 } 544 argv = p - 1; 545 break; 546 } 547 } 548 } 549 550 void 551 enomem() 552 { 553 showusage = 0; 554 err("%s", strerror(errno)); 555 } 556 557 void 558 usage() 559 { 560 (void)fprintf(stderr, "%s%s\n", 561 "usage: join [-a fileno | -v fileno ] [-e string] [-1 field] ", 562 "[-2 field]\n [-o list] [-t char] file1 file2"); 563 exit(1); 564 } 565 566 #if __STDC__ 567 #include <stdarg.h> 568 #else 569 #include <varargs.h> 570 #endif 571 572 void 573 #if __STDC__ 574 err(const char *fmt, ...) 575 #else 576 err(fmt, va_alist) 577 char *fmt; 578 va_dcl 579 #endif 580 { 581 va_list ap; 582 #if __STDC__ 583 va_start(ap, fmt); 584 #else 585 va_start(ap); 586 #endif 587 (void)fprintf(stderr, "join: "); 588 (void)vfprintf(stderr, fmt, ap); 589 va_end(ap); 590 (void)fprintf(stderr, "\n"); 591 if (showusage) 592 usage(); 593 exit(1); 594 /* NOTREACHED */ 595 } 596