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- /*-
- * Copyright (c) 1991 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Steve Hayman of Indiana University, Michiro Hikida and David
- * Goodenough.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- char copyright[] =
- "@(#) Copyright (c) 1991 The Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)join.c 5.1 (Berkeley) 11/18/91";
- #endif /* not lint */
-
- #include <sys/types.h>
- #include <errno.h>
- #include <stdlib.h>
- #include <stdio.h>
- #include <string.h>
- #include <ctype.h>
-
- /*
- * There's a structure per input file which encapsulates the state of the
- * file. We repeatedly read lines from each file until we've read in all
- * the consecutive lines from the file with a common join field. Then we
- * compare the set of lines with an equivalent set from the other file.
- */
- typedef struct {
- char *line; /* line */
- u_long linealloc; /* line allocated count */
- char **fields; /* line field(s) */
- u_long fieldcnt; /* line field(s) count */
- u_long fieldalloc; /* line field(s) allocated count */
- } LINE;
-
- typedef struct {
- FILE *fp; /* file descriptor */
- u_long joinf; /* join field (-1, -2, -j) */
- int unpair; /* output unpairable lines (-a) */
- int number; /* 1 for file 1, 2 for file 2 */
-
- LINE *set; /* set of lines with same field */
- u_long pushback; /* line on the stack */
- u_long setcnt; /* set count */
- u_long setalloc; /* set allocated count */
- } INPUT;
- INPUT input1 = { NULL, 0, 0, 1, NULL, -1, 0, 0, },
- input2 = { NULL, 0, 0, 1, NULL, -1, 0, 0, };
-
- typedef struct {
- u_long fileno; /* file number */
- u_long fieldno; /* field number */
- } OLIST;
- OLIST *olist; /* output field list */
- u_long olistcnt; /* output field list count */
- u_long olistalloc; /* output field allocated count */
-
- int joinout = 1; /* show lines with matched join fields (-v) */
- int needsep; /* need separator character */
- int showusage = 1; /* show usage for usage err() calls */
- int spans = 1; /* span multiple delimiters (-t) */
- char *empty; /* empty field replacement string (-e) */
- char *tabchar = " \t"; /* delimiter characters (-t) */
-
- int cmp __P((LINE *, u_long, LINE *, u_long));
- void enomem __P((void));
- void err __P((const char *, ...));
- void fieldarg __P((char *));
- void joinlines __P((INPUT *, INPUT *));
- void obsolete __P((char **));
- void outfield __P((LINE *, u_long));
- void outoneline __P((INPUT *, LINE *));
- void outtwoline __P((INPUT *, LINE *, INPUT *, LINE *));
- void slurp __P((INPUT *));
- void usage __P((void));
-
- int
- main(argc, argv)
- int argc;
- char *argv[];
- {
- register INPUT *F1, *F2;
- int aflag, ch, cval, vflag;
- char *end;
-
- F1 = &input1;
- F2 = &input2;
-
- aflag = vflag = 0;
- obsolete(argv);
- while ((ch = getopt(argc, argv, "\01a:e:j:1:2:o:t:v:")) != EOF) {
- switch (ch) {
- case '\01':
- aflag = 1;
- F1->unpair = F2->unpair = 1;
- break;
- case '1':
- if ((F1->joinf = strtol(optarg, &end, 10)) < 1)
- err("-1 option field number less than 1");
- if (*end)
- err("illegal field number -- %s", optarg);
- --F1->joinf;
- break;
- case '2':
- if ((F2->joinf = strtol(optarg, &end, 10)) < 1)
- err("-2 option field number less than 1");
- if (*end)
- err("illegal field number -- %s", optarg);
- --F2->joinf;
- break;
- case 'a':
- aflag = 1;
- switch(strtol(optarg, &end, 10)) {
- case 1:
- F1->unpair = 1;
- break;
- case 2:
- F2->unpair = 1;
- break;
- default:
- err("-a option file number not 1 or 2");
- break;
- }
- if (*end)
- err("illegal file number -- %s", optarg);
- break;
- case 'e':
- empty = optarg;
- break;
- case 'j':
- if ((F1->joinf = F2->joinf =
- strtol(optarg, &end, 10)) < 1)
- err("-j option field number less than 1");
- if (*end)
- err("illegal field number -- %s", optarg);
- --F1->joinf;
- --F2->joinf;
- break;
- case 'o':
- fieldarg(optarg);
- break;
- case 't':
- spans = 0;
- if (strlen(tabchar = optarg) != 1)
- err("illegal tab character specification");
- break;
- case 'v':
- vflag = 1;
- joinout = 0;
- switch(strtol(optarg, &end, 10)) {
- case 1:
- F1->unpair = 1;
- break;
- case 2:
- F2->unpair = 1;
- break;
- default:
- err("-v option file number not 1 or 2");
- break;
- }
- if (*end)
- err("illegal file number -- %s", optarg);
- break;
- case '?':
- default:
- usage();
- }
- }
- argc -= optind;
- argv += optind;
-
- if (aflag && vflag)
- err("-a and -v options mutually exclusive");
-
- if (argc != 2)
- usage();
- showusage = 0;
-
- /* Open the files; "-" means stdin. */
- if (!strcmp(*argv, "-"))
- F1->fp = stdin;
- else if ((F1->fp = fopen(*argv, "r")) == NULL)
- err("%s: %s", *argv, strerror(errno));
- ++argv;
- if (!strcmp(*argv, "-"))
- F2->fp = stdin;
- else if ((F2->fp = fopen(*argv, "r")) == NULL)
- err("%s: %s", *argv, strerror(errno));
- if (F1->fp == stdin && F2->fp == stdin)
- err("only one input file may be stdin");
-
- slurp(F1);
- slurp(F2);
- while (F1->setcnt && F2->setcnt) {
- cval = cmp(F1->set, F1->joinf, F2->set, F2->joinf);
- if (cval == 0) {
- /* Oh joy, oh rapture, oh beauty divine! */
- if (joinout)
- joinlines(F1, F2);
- slurp(F1);
- slurp(F2);
- } else if (cval < 0) {
- /* File 1 takes the lead... */
- if (F1->unpair)
- joinlines(F1, NULL);
- slurp(F1);
- } else {
- /* File 2 takes the lead... */
- if (F2->unpair)
- joinlines(F2, NULL);
- slurp(F2);
- }
- }
-
- /*
- * Now that one of the files is used up, optionally output any
- * remaining lines from the other file.
- */
- if (F1->unpair)
- while (F1->setcnt) {
- joinlines(F1, NULL);
- slurp(F1);
- }
- if (F2->unpair)
- while (F2->setcnt) {
- joinlines(F2, NULL);
- slurp(F2);
- }
- exit(0);
- }
-
- void
- slurp(F)
- INPUT *F;
- {
- register LINE *lp, *lastlp;
- LINE tmp;
- size_t len;
- int cnt;
- char *bp, *fieldp, *token;
-
- /*
- * Read all of the lines from an input file that have the same
- * join field.
- */
- F->setcnt = 0;
- for (lastlp = NULL;; ++F->setcnt, lastlp = lp) {
- /*
- * If we're out of space to hold line structures, allocate
- * more. Initialize the structure so that we know that this
- * is new space.
- */
- if (F->setcnt == F->setalloc) {
- cnt = F->setalloc;
- F->setalloc += 100;
- if ((F->set = realloc(F->set,
- F->setalloc * sizeof(LINE))) == NULL)
- enomem();
- bzero(F->set + cnt, 100 * sizeof(LINE *));
- }
-
- /*
- * Get any pushed back line, else get the next line. Allocate
- * space as necessary. If taking the line from the stack swap
- * the two structures so that we don't lose the allocated space.
- * This could be avoided by doing another level of indirection,
- * but it's probably okay as is.
- */
- lp = &F->set[F->setcnt];
- if (F->pushback != -1) {
- tmp = F->set[F->setcnt];
- F->set[F->setcnt] = F->set[F->pushback];
- F->set[F->pushback] = tmp;
- F->pushback = -1;
- continue;
- }
- if ((bp = fgetline(F->fp, &len)) == NULL)
- return;
- if (lp->linealloc <= len) {
- lp->linealloc += 100;
- if ((lp->line = realloc(lp->line,
- lp->linealloc * sizeof(char))) == NULL)
- enomem();
- }
- bcopy(bp, lp->line, len);
-
- /* Split the line into fields, allocate space as necessary. */
- token = bp;
- lp->fieldcnt = 0;
- while ((fieldp = strsep(&token, tabchar)) != NULL) {
- if (spans && *fieldp == '\0')
- continue;
- if (lp->fieldcnt == lp->fieldalloc) {
- lp->fieldalloc += 100;
- if ((lp->fields = realloc(lp->fields,
- lp->fieldalloc * sizeof(char *))) == NULL)
- enomem();
- }
- lp->fields[lp->fieldcnt++] = fieldp;
- }
-
- /* See if the join field value has changed. */
- if (lastlp != NULL && cmp(lp, F->joinf, lastlp, F->joinf)) {
- F->pushback = F->setcnt;
- break;
- }
- }
- }
-
- int
- cmp(lp1, fieldno1, lp2, fieldno2)
- LINE *lp1, *lp2;
- u_long fieldno1, fieldno2;
- {
- if (lp1->fieldcnt < fieldno1)
- return (lp2->fieldcnt < fieldno2 ? 0 : 1);
- if (lp2->fieldcnt < fieldno2)
- return (-1);
- return (strcmp(lp1->fields[fieldno1], lp2->fields[fieldno2]));
- }
-
- void
- joinlines(F1, F2)
- register INPUT *F1, *F2;
- {
- register int cnt1, cnt2;
-
- /*
- * Output the results of a join comparison. The output may be from
- * either file 1 or file 2 (in which case the first argument is the
- * file from which to output) or from both.
- */
- if (F2 == NULL) {
- for (cnt1 = 0; cnt1 < F1->setcnt; ++cnt1)
- outoneline(F1, &F1->set[cnt1]);
- return;
- }
- for (cnt1 = 0; cnt1 < F1->setcnt; ++cnt1)
- for (cnt2 = 0; cnt2 < F2->setcnt; ++cnt2)
- outtwoline(F1, &F1->set[cnt1], F2, &F2->set[cnt2]);
- }
-
- void
- outoneline(F, lp)
- INPUT *F;
- register LINE *lp;
- {
- register int cnt;
-
- /*
- * Output a single line from one of the files, according to the
- * join rules. This happens when we are writing unmatched single
- * lines. Output empty fields in the right places.
- */
- if (olist)
- for (cnt = 0; cnt < olistcnt; ++cnt) {
- if (olist[cnt].fileno == F->number)
- outfield(lp, olist[cnt].fieldno);
- }
- else
- for (cnt = 0; cnt < lp->fieldcnt; ++cnt)
- outfield(lp, cnt);
- (void)printf("\n");
- if (ferror(stdout))
- err("stdout: %s", strerror(errno));
- needsep = 0;
- }
-
- void
- outtwoline(F1, lp1, F2, lp2)
- register INPUT *F1, *F2;
- register LINE *lp1, *lp2;
- {
- register int cnt;
-
- /* Output a pair of lines according to the join list (if any). */
- if (olist)
- for (cnt = 0; cnt < olistcnt; ++cnt)
- if (olist[cnt].fileno == 1)
- outfield(lp1, olist[cnt].fieldno);
- else /* if (olist[cnt].fileno == 2) */
- outfield(lp2, olist[cnt].fieldno);
- else {
- /*
- * Output the join field, then the remaining fields from F1
- * and F2.
- */
- outfield(lp1, F1->joinf);
- for (cnt = 0; cnt < lp1->fieldcnt; ++cnt)
- if (F1->joinf != cnt)
- outfield(lp1, cnt);
- for (cnt = 0; cnt < lp2->fieldcnt; ++cnt)
- if (F2->joinf != cnt)
- outfield(lp2, cnt);
- }
- (void)printf("\n");
- if (ferror(stdout))
- err("stdout: %s", strerror(errno));
- needsep = 0;
- }
-
- void
- outfield(lp, fieldno)
- LINE *lp;
- u_long fieldno;
- {
- if (needsep++)
- (void)printf("%c", *tabchar);
- if (!ferror(stdout))
- if (lp->fieldcnt < fieldno) {
- if (empty != NULL)
- (void)printf("%s", empty);
- } else {
- if (*lp->fields[fieldno] == '\0')
- return;
- (void)printf("%s", lp->fields[fieldno]);
- }
- if (ferror(stdout))
- err("stdout: %s", strerror(errno));
- }
-
- /*
- * Convert an output list argument "2.1, 1.3, 2.4" into an array of output
- * fields.
- */
- void
- fieldarg(option)
- char *option;
- {
- u_long fieldno;
- char *end, *token;
-
- while ((token = strsep(&option, " \t")) != NULL) {
- if (*token == '\0')
- continue;
- if (token[0] != '1' && token[0] != '2' || token[1] != '.')
- err("malformed -o option field");
- fieldno = strtol(token + 2, &end, 10);
- if (*end)
- err("malformed -o option field");
- if (fieldno == 0)
- err("field numbers are 1 based");
- if (olistcnt == olistalloc) {
- olistalloc += 50;
- if ((olist = realloc(olist,
- olistalloc * sizeof(OLIST))) == NULL)
- enomem();
- }
- olist[olistcnt].fileno = token[0] - '0';
- olist[olistcnt].fieldno = fieldno - 1;
- ++olistcnt;
- }
- }
-
- void
- obsolete(argv)
- char **argv;
- {
- int len;
- char **p, *ap, *t;
-
- while (ap = *++argv) {
- /* Return if "--". */
- if (ap[0] == '-' && ap[1] == '-')
- return;
- switch (ap[1]) {
- case 'a':
- /*
- * The original join allowed "-a", which meant the
- * same as -a1 plus -a2. POSIX 1003.2, Draft 11.2
- * only specifies this as "-a 1" and "a -2", so we
- * have to use another option flag, one that is
- * unlikely to ever be used or accidentally entered
- * on the command line. (Well, we could reallocate
- * the argv array, but that hardly seems worthwhile.)
- */
- if (ap[2] == '\0')
- ap[1] = '\01';
- break;
- case 'j':
- /*
- * The original join allowed "-j[12] arg" and "-j arg".
- * Convert the former to "-[12] arg". Don't convert
- * the latter since getopt(3) can handle it.
- */
- switch(ap[2]) {
- case '1':
- if (ap[3] != '\0')
- goto jbad;
- ap[1] = '1';
- ap[2] = '\0';
- break;
- case '2':
- if (ap[3] != '\0')
- goto jbad;
- ap[1] = '2';
- ap[2] = '\0';
- break;
- case '\0':
- break;
- default:
- jbad: err("illegal option -- %s", ap);
- usage();
- }
- break;
- case 'o':
- /*
- * The original join allowed "-o arg arg". Convert to
- * "-o arg -o arg".
- */
- if (ap[2] != '\0')
- break;
- for (p = argv + 2; *p; ++p) {
- if (p[0][0] != '1' && p[0][0] != '2' ||
- p[0][1] != '.')
- break;
- len = strlen(*p);
- if (len - 2 != strspn(*p + 2, "0123456789"))
- break;
- if ((t = malloc(len + 3)) == NULL)
- enomem();
- t[0] = '-';
- t[1] = 'o';
- bcopy(*p, t + 2, len + 1);
- *p = t;
- }
- argv = p - 1;
- break;
- }
- }
- }
-
- void
- enomem()
- {
- showusage = 0;
- err("%s", strerror(errno));
- }
-
- void
- usage()
- {
- (void)fprintf(stderr, "%s%s\n",
- "usage: join [-a fileno | -v fileno ] [-e string] [-1 field] ",
- "[-2 field]\n [-o list] [-t char] file1 file2");
- exit(1);
- }
-
- #if __STDC__
- #include <stdarg.h>
- #else
- #include <varargs.h>
- #endif
-
- void
- #if __STDC__
- err(const char *fmt, ...)
- #else
- err(fmt, va_alist)
- char *fmt;
- va_dcl
- #endif
- {
- va_list ap;
- #if __STDC__
- va_start(ap, fmt);
- #else
- va_start(ap);
- #endif
- (void)fprintf(stderr, "join: ");
- (void)vfprintf(stderr, fmt, ap);
- va_end(ap);
- (void)fprintf(stderr, "\n");
- if (showusage)
- usage();
- exit(1);
- /* NOTREACHED */
- }
-