diff options
Diffstat (limited to 'usr.bin/join/join.c')
| -rw-r--r-- | usr.bin/join/join.c | 665 |
1 files changed, 665 insertions, 0 deletions
diff --git a/usr.bin/join/join.c b/usr.bin/join/join.c new file mode 100644 index 0000000..97bb4cf --- /dev/null +++ b/usr.bin/join/join.c @@ -0,0 +1,665 @@ +/*- + * Copyright (c) 1991, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Steve Hayman of the Computer Science Department, 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. + * 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 +static const char copyright[] = +"@(#) Copyright (c) 1991, 1993, 1994\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +#if 0 +static char sccsid[] = "@(#)join.c 8.6 (Berkeley) 5/4/95"; +#endif +#endif /* not lint */ +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> + +#include <err.h> +#include <errno.h> +#include <limits.h> +#include <locale.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <wchar.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) */ + u_long number; /* 1 for file 1, 2 for file 2 */ + + LINE *set; /* set of lines with same field */ + int pushbool; /* if pushback is set */ + u_long pushback; /* line on the stack */ + u_long setcnt; /* set count */ + u_long setalloc; /* set allocated count */ +} INPUT; +static INPUT input1 = { NULL, 0, 0, 1, NULL, 0, 0, 0, 0 }, + input2 = { NULL, 0, 0, 2, NULL, 0, 0, 0, 0 }; + +typedef struct { + u_long filenum; /* file number */ + u_long fieldno; /* field number */ +} OLIST; +static OLIST *olist; /* output field list */ +static u_long olistcnt; /* output field list count */ +static u_long olistalloc; /* output field allocated count */ + +static int joinout = 1; /* show lines with matched join fields (-v) */ +static int needsep; /* need separator character */ +static int spans = 1; /* span multiple delimiters (-t) */ +static char *empty; /* empty field replacement string (-e) */ +static wchar_t default_tabchar[] = L" \t"; +static wchar_t *tabchar = default_tabchar; /* delimiter characters (-t) */ + +static int cmp(LINE *, u_long, LINE *, u_long); +static void fieldarg(char *); +static void joinlines(INPUT *, INPUT *); +static int mbscoll(const char *, const char *); +static char *mbssep(char **, const wchar_t *); +static void obsolete(char **); +static void outfield(LINE *, u_long, int); +static void outoneline(INPUT *, LINE *); +static void outtwoline(INPUT *, LINE *, INPUT *, LINE *); +static void slurp(INPUT *); +static wchar_t *towcs(const char *); +static void usage(void); + +int +main(int argc, char *argv[]) +{ + INPUT *F1, *F2; + int aflag, ch, cval, vflag; + char *end; + + setlocale(LC_ALL, ""); + + F1 = &input1; + F2 = &input2; + + aflag = vflag = 0; + obsolete(argv); + while ((ch = getopt(argc, argv, "\01a:e:j:1:2:o:t:v:")) != -1) { + switch (ch) { + case '\01': /* See comment in obsolete(). */ + aflag = 1; + F1->unpair = F2->unpair = 1; + break; + case '1': + if ((F1->joinf = strtol(optarg, &end, 10)) < 1) + errx(1, "-1 option field number less than 1"); + if (*end) + errx(1, "illegal field number -- %s", optarg); + --F1->joinf; + break; + case '2': + if ((F2->joinf = strtol(optarg, &end, 10)) < 1) + errx(1, "-2 option field number less than 1"); + if (*end) + errx(1, "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: + errx(1, "-a option file number not 1 or 2"); + break; + } + if (*end) + errx(1, "illegal file number -- %s", optarg); + break; + case 'e': + empty = optarg; + break; + case 'j': + if ((F1->joinf = F2->joinf = + strtol(optarg, &end, 10)) < 1) + errx(1, "-j option field number less than 1"); + if (*end) + errx(1, "illegal field number -- %s", optarg); + --F1->joinf; + --F2->joinf; + break; + case 'o': + fieldarg(optarg); + break; + case 't': + spans = 0; + if (mbrtowc(&tabchar[0], optarg, MB_LEN_MAX, NULL) != + strlen(optarg)) + errx(1, "illegal tab character specification"); + tabchar[1] = L'\0'; + 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: + errx(1, "-v option file number not 1 or 2"); + break; + } + if (*end) + errx(1, "illegal file number -- %s", optarg); + break; + case '?': + default: + usage(); + } + } + argc -= optind; + argv += optind; + + if (aflag && vflag) + errx(1, "the -a and -v options are mutually exclusive"); + + if (argc != 2) + usage(); + + /* Open the files; "-" means stdin. */ + if (!strcmp(*argv, "-")) + F1->fp = stdin; + else if ((F1->fp = fopen(*argv, "r")) == NULL) + err(1, "%s", *argv); + ++argv; + if (!strcmp(*argv, "-")) + F2->fp = stdin; + else if ((F2->fp = fopen(*argv, "r")) == NULL) + err(1, "%s", *argv); + if (F1->fp == stdin && F2->fp == stdin) + errx(1, "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); +} + +static void +slurp(INPUT *F) +{ + LINE *lp, *lastlp, tmp; + size_t len; + int cnt; + char *bp, *fieldp; + + /* + * Read all of the lines from an input file that have the same + * join field. + */ + F->setcnt = 0; + for (lastlp = NULL;; ++F->setcnt) { + /* + * 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 += 50; + if ((F->set = realloc(F->set, + F->setalloc * sizeof(LINE))) == NULL) + err(1, NULL); + memset(F->set + cnt, 0, 50 * sizeof(LINE)); + + /* re-set lastlp in case it moved */ + if (lastlp != NULL) + lastlp = &F->set[F->setcnt - 1]; + } + + /* + * 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 space allocated to + * either structure. This could be avoided by doing another + * level of indirection, but it's probably okay as is. + */ + lp = &F->set[F->setcnt]; + if (F->setcnt) + lastlp = &F->set[F->setcnt - 1]; + if (F->pushbool) { + tmp = F->set[F->setcnt]; + F->set[F->setcnt] = F->set[F->pushback]; + F->set[F->pushback] = tmp; + F->pushbool = 0; + continue; + } + if ((bp = fgetln(F->fp, &len)) == NULL) + return; + if (lp->linealloc <= len + 1) { + lp->linealloc += MAX(100, len + 1 - lp->linealloc); + if ((lp->line = + realloc(lp->line, lp->linealloc)) == NULL) + err(1, NULL); + } + memmove(lp->line, bp, len); + + /* Replace trailing newline, if it exists. */ + if (bp[len - 1] == '\n') + lp->line[len - 1] = '\0'; + else + lp->line[len] = '\0'; + bp = lp->line; + + /* Split the line into fields, allocate space as necessary. */ + lp->fieldcnt = 0; + while ((fieldp = mbssep(&bp, tabchar)) != NULL) { + if (spans && *fieldp == '\0') + continue; + if (lp->fieldcnt == lp->fieldalloc) { + lp->fieldalloc += 50; + if ((lp->fields = realloc(lp->fields, + lp->fieldalloc * sizeof(char *))) == NULL) + err(1, NULL); + } + lp->fields[lp->fieldcnt++] = fieldp; + } + + /* See if the join field value has changed. */ + if (lastlp != NULL && cmp(lp, F->joinf, lastlp, F->joinf)) { + F->pushbool = 1; + F->pushback = F->setcnt; + break; + } + } +} + +static char * +mbssep(char **stringp, const wchar_t *delim) +{ + char *s, *tok; + const wchar_t *spanp; + wchar_t c, sc; + size_t n; + + if ((s = *stringp) == NULL) + return (NULL); + for (tok = s;;) { + n = mbrtowc(&c, s, MB_LEN_MAX, NULL); + if (n == (size_t)-1 || n == (size_t)-2) + errc(1, EILSEQ, NULL); /* XXX */ + s += n; + spanp = delim; + do { + if ((sc = *spanp++) == c) { + if (c == 0) + s = NULL; + else + s[-n] = '\0'; + *stringp = s; + return (tok); + } + } while (sc != 0); + } +} + +static int +cmp(LINE *lp1, u_long fieldno1, LINE *lp2, u_long fieldno2) +{ + if (lp1->fieldcnt <= fieldno1) + return (lp2->fieldcnt <= fieldno2 ? 0 : 1); + if (lp2->fieldcnt <= fieldno2) + return (-1); + return (mbscoll(lp1->fields[fieldno1], lp2->fields[fieldno2])); +} + +static int +mbscoll(const char *s1, const char *s2) +{ + wchar_t *w1, *w2; + int ret; + + if (MB_CUR_MAX == 1) + return (strcoll(s1, s2)); + if ((w1 = towcs(s1)) == NULL || (w2 = towcs(s2)) == NULL) + err(1, NULL); /* XXX */ + ret = wcscoll(w1, w2); + free(w1); + free(w2); + return (ret); +} + +static wchar_t * +towcs(const char *s) +{ + wchar_t *wcs; + size_t n; + + if ((n = mbsrtowcs(NULL, &s, 0, NULL)) == (size_t)-1) + return (NULL); + if ((wcs = malloc((n + 1) * sizeof(*wcs))) == NULL) + return (NULL); + mbsrtowcs(wcs, &s, n + 1, NULL); + return (wcs); +} + +static void +joinlines(INPUT *F1, INPUT *F2) +{ + u_long 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]); +} + +static void +outoneline(INPUT *F, LINE *lp) +{ + u_long 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].filenum == (unsigned)F->number) + outfield(lp, olist[cnt].fieldno, 0); + else if (olist[cnt].filenum == 0) + outfield(lp, F->joinf, 0); + else + outfield(lp, 0, 1); + } + else + for (cnt = 0; cnt < lp->fieldcnt; ++cnt) + outfield(lp, cnt, 0); + (void)printf("\n"); + if (ferror(stdout)) + err(1, "stdout"); + needsep = 0; +} + +static void +outtwoline(INPUT *F1, LINE *lp1, INPUT *F2, LINE *lp2) +{ + u_long cnt; + + /* Output a pair of lines according to the join list (if any). */ + if (olist) + for (cnt = 0; cnt < olistcnt; ++cnt) + if (olist[cnt].filenum == 0) { + if (lp1->fieldcnt >= F1->joinf) + outfield(lp1, F1->joinf, 0); + else + outfield(lp2, F2->joinf, 0); + } else if (olist[cnt].filenum == 1) + outfield(lp1, olist[cnt].fieldno, 0); + else /* if (olist[cnt].filenum == 2) */ + outfield(lp2, olist[cnt].fieldno, 0); + else { + /* + * Output the join field, then the remaining fields from F1 + * and F2. + */ + outfield(lp1, F1->joinf, 0); + for (cnt = 0; cnt < lp1->fieldcnt; ++cnt) + if (F1->joinf != cnt) + outfield(lp1, cnt, 0); + for (cnt = 0; cnt < lp2->fieldcnt; ++cnt) + if (F2->joinf != cnt) + outfield(lp2, cnt, 0); + } + (void)printf("\n"); + if (ferror(stdout)) + err(1, "stdout"); + needsep = 0; +} + +static void +outfield(LINE *lp, u_long fieldno, int out_empty) +{ + if (needsep++) + (void)printf("%lc", *tabchar); + if (!ferror(stdout)) { + if (lp->fieldcnt <= fieldno || out_empty) { + if (empty != NULL) + (void)printf("%s", empty); + } else { + if (*lp->fields[fieldno] == '\0') + return; + (void)printf("%s", lp->fields[fieldno]); + } + } + if (ferror(stdout)) + err(1, "stdout"); +} + +/* + * Convert an output list argument "2.1, 1.3, 2.4" into an array of output + * fields. + */ +static void +fieldarg(char *option) +{ + u_long fieldno, filenum; + char *end, *token; + + while ((token = strsep(&option, ", \t")) != NULL) { + if (*token == '\0') + continue; + if (token[0] == '0') + filenum = fieldno = 0; + else if ((token[0] == '1' || token[0] == '2') && + token[1] == '.') { + filenum = token[0] - '0'; + fieldno = strtol(token + 2, &end, 10); + if (*end) + errx(1, "malformed -o option field"); + if (fieldno == 0) + errx(1, "field numbers are 1 based"); + --fieldno; + } else + errx(1, "malformed -o option field"); + if (olistcnt == olistalloc) { + olistalloc += 50; + if ((olist = realloc(olist, + olistalloc * sizeof(OLIST))) == NULL) + err(1, NULL); + } + olist[olistcnt].filenum = filenum; + olist[olistcnt].fieldno = fieldno; + ++olistcnt; + } +} + +static void +obsolete(char **argv) +{ + size_t len; + char **p, *ap, *t; + + while ((ap = *++argv) != NULL) { + /* Return if "--". */ + if (ap[0] == '-' && ap[1] == '-') + return; + /* skip if not an option */ + if (ap[0] != '-') + continue; + 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' && (argv[1] == NULL || + (strcmp(argv[1], "1") != 0 && + strcmp(argv[1], "2") != 0))) { + ap[1] = '\01'; + warnx("-a option used without an argument; " + "reverting to historical behavior"); + } + 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: errx(1, "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] == '0' || ((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) + err(1, NULL); + t[0] = '-'; + t[1] = 'o'; + memmove(t + 2, *p, len + 1); + *p = t; + } + argv = p - 1; + break; + } + } +} + +static void +usage(void) +{ + (void)fprintf(stderr, "%s %s\n%s\n", + "usage: join [-a fileno | -v fileno ] [-e string] [-1 field]", + "[-2 field]", + " [-o list] [-t char] file1 file2"); + exit(1); +} |
