From: William F. Jolitz Date: Thu, 18 Apr 1991 00:07:02 +0000 (-0800) Subject: 386BSD 0.0 development X-Git-Tag: 386BSD-0.0~708 X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/commitdiff_plain/af459345f5926ee91a84348d115acb60e8218148 386BSD 0.0 development Work on file usr/src/usr.bin/cut/cut.c Co-Authored-By: Lynne Greer Jolitz Synthesized-from: 386BSD-0.0/src --- diff --git a/usr/src/usr.bin/cut/cut.c b/usr/src/usr.bin/cut/cut.c new file mode 100644 index 0000000000..a7e81a7a78 --- /dev/null +++ b/usr/src/usr.bin/cut/cut.c @@ -0,0 +1,270 @@ +/* + * Copyright (c) 1989 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Adam S. Moskowitz of Menlo Consulting and Marciano Pitargue. + * + * 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) 1989 The Regents of the University of California.\n\ + All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +static char sccsid[] = "@(#)cut.c 5.4 (Berkeley) 10/30/90"; +#endif /* not lint */ + +#include +#include +#include + +int cflag; +char dchar; +int dflag; +int fflag; +int sflag; + +main(argc, argv) + int argc; + char **argv; +{ + extern char *optarg; + extern int errno, optind; + FILE *fp; + int ch, (*fcn)(), c_cut(), f_cut(); + char *strerror(); + + dchar = '\t'; /* default delimiter is \t */ + + while ((ch = getopt(argc, argv, "c:d:f:s")) != EOF) + switch(ch) { + case 'c': + fcn = c_cut; + get_list(optarg); + cflag = 1; + break; + case 'd': + dchar = *optarg; + dflag = 1; + break; + case 'f': + get_list(optarg); + fcn = f_cut; + fflag = 1; + break; + case 's': + sflag = 1; + break; + case '?': + default: + usage(); + } + argc -= optind; + argv += optind; + + if (fflag) { + if (cflag) + usage(); + } else if (!cflag || dflag || sflag) + usage(); + + if (*argv) + for (; *argv; ++argv) { + if (!(fp = fopen(*argv, "r"))) { + (void)fprintf(stderr, + "cut: %s: %s\n", *argv, strerror(errno)); + exit(1); + } + fcn(fp, *argv); + } + else + fcn(stdin, "stdin"); + exit(0); +} + +int autostart, autostop, maxval; + +char positions[_POSIX2_LINE_MAX + 1]; + +get_list(list) + char *list; +{ + register char *pos; + register int setautostart, start, stop; + char *p, *strtok(); + + /* + * set a byte in the positions array to indicate if a field or + * column is to be selected; use +1, it's 1-based, not 0-based. + * This parser is less restrictive than the Draft 9 POSIX spec. + * POSIX doesn't allow lists that aren't in increasing order or + * overlapping lists. We also handle "-3-5" although there's no + * real reason too. + */ + for (; p = strtok(list, ", \t"); list = NULL) { + setautostart = start = stop = 0; + if (*p == '-') { + ++p; + setautostart = 1; + } + if (isdigit(*p)) { + start = stop = strtol(p, &p, 10); + if (setautostart && start > autostart) + autostart = start; + } + if (*p == '-') { + if (isdigit(p[1])) + stop = strtol(p + 1, &p, 10); + if (*p == '-') { + ++p; + if (!autostop || autostop > stop) + autostop = stop; + } + } + if (*p) + badlist("illegal list value"); + if (!stop || !start) + badlist("values may not include zero"); + if (stop > _POSIX2_LINE_MAX) { + /* positions used rather than allocate a new buffer */ + (void)sprintf(positions, "%d too large (max %d)", + stop, _POSIX2_LINE_MAX); + badlist(positions); + } + if (maxval < stop) + maxval = stop; + for (pos = positions + start; start++ <= stop; *pos++ = 1); + } + + /* overlapping ranges */ + if (autostop && maxval > autostop) + maxval = autostop; + + /* set autostart */ + if (autostart) + memset(positions + 1, '1', autostart); +} + +/* ARGSUSED */ +c_cut(fp, fname) + FILE *fp; + char *fname; +{ + register int ch, col; + register char *pos; + + for (;;) { + pos = positions + 1; + for (col = maxval; col; --col) { + if ((ch = getc(fp)) == EOF) + return; + if (ch == '\n') + break; + if (*pos++) + putchar(ch); + } + if (ch != '\n') + if (autostop) + while ((ch = getc(fp)) != EOF && ch != '\n') + putchar(ch); + else + while ((ch = getc(fp)) != EOF && ch != '\n'); + putchar('\n'); + } +} + +f_cut(fp, fname) + FILE *fp; + char *fname; +{ + register int ch, field, isdelim; + register char *pos, *p, sep; + int output; + char lbuf[_POSIX2_LINE_MAX + 1]; + + for (sep = dchar, output = 0; fgets(lbuf, sizeof(lbuf), fp);) { + for (isdelim = 0, p = lbuf;; ++p) { + if (!(ch = *p)) { + (void)fprintf(stderr, + "cut: %s: line too long.\n", fname); + exit(1); + } + /* this should work if newline is delimiter */ + if (ch == sep) + isdelim = 1; + if (ch == '\n') { + if (!isdelim && !sflag) + (void)printf("%s", lbuf); + break; + } + } + if (!isdelim) + continue; + + pos = positions + 1; + for (field = maxval, p = lbuf; field; --field, ++pos) { + if (*pos) { + if (output++) + putchar(sep); + while ((ch = *p++) != '\n' && ch != sep) + putchar(ch); + } else + while ((ch = *p++) != '\n' && ch != sep); + if (ch == '\n') + break; + } + if (ch != '\n') + if (autostop) { + if (output) + putchar(sep); + for (; (ch = *p) != '\n'; ++p) + putchar(ch); + } else + for (; (ch = *p) != '\n'; ++p); + putchar('\n'); + } +} + +badlist(msg) + char *msg; +{ + (void)fprintf(stderr, "cut: [-cf] list: %s.\n", msg); + exit(1); +} + +usage() +{ + (void)fprintf(stderr, +"usage:\tcut -c list [file1 ...]\n\tcut -f list [-s] [-d delim] [file ...]\n"); + exit(1); +}