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15637ed4 RG |
1 | /* |
2 | * Copyright (c) 1989 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Adam S. Moskowitz of Menlo Consulting and Marciano Pitargue. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * 1. Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. All advertising materials mentioning features or use of this software | |
17 | * must display the following acknowledgement: | |
18 | * This product includes software developed by the University of | |
19 | * California, Berkeley and its contributors. | |
20 | * 4. Neither the name of the University nor the names of its contributors | |
21 | * may be used to endorse or promote products derived from this software | |
22 | * without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
34 | * SUCH DAMAGE. | |
35 | * | |
36 | * PATCHES MAGIC LEVEL PATCH THAT GOT US HERE | |
37 | * -------------------- ----- ---------------------- | |
38 | * CURRENT PATCH LEVEL: 1 00142 | |
39 | * -------------------- ----- ---------------------- | |
40 | * | |
41 | * 20 Apr 93 Simon J Gerraty cut -f1 outputs a field separator | |
42 | * before the first field. | |
43 | */ | |
44 | ||
45 | #ifndef lint | |
46 | char copyright[] = | |
47 | "@(#) Copyright (c) 1989 The Regents of the University of California.\n\ | |
48 | All rights reserved.\n"; | |
49 | #endif /* not lint */ | |
50 | ||
51 | #ifndef lint | |
52 | static char sccsid[] = "@(#)cut.c 5.4 (Berkeley) 10/30/90"; | |
53 | #endif /* not lint */ | |
54 | ||
55 | #include <limits.h> | |
56 | #include <stdio.h> | |
57 | #include <ctype.h> | |
58 | ||
59 | int cflag; | |
60 | char dchar; | |
61 | int dflag; | |
62 | int fflag; | |
63 | int sflag; | |
64 | ||
65 | main(argc, argv) | |
66 | int argc; | |
67 | char **argv; | |
68 | { | |
69 | extern char *optarg; | |
70 | extern int errno, optind; | |
71 | FILE *fp; | |
72 | int ch, (*fcn)(), c_cut(), f_cut(); | |
73 | char *strerror(); | |
74 | ||
75 | dchar = '\t'; /* default delimiter is \t */ | |
76 | ||
77 | while ((ch = getopt(argc, argv, "c:d:f:s")) != EOF) | |
78 | switch(ch) { | |
79 | case 'c': | |
80 | fcn = c_cut; | |
81 | get_list(optarg); | |
82 | cflag = 1; | |
83 | break; | |
84 | case 'd': | |
85 | dchar = *optarg; | |
86 | dflag = 1; | |
87 | break; | |
88 | case 'f': | |
89 | get_list(optarg); | |
90 | fcn = f_cut; | |
91 | fflag = 1; | |
92 | break; | |
93 | case 's': | |
94 | sflag = 1; | |
95 | break; | |
96 | case '?': | |
97 | default: | |
98 | usage(); | |
99 | } | |
100 | argc -= optind; | |
101 | argv += optind; | |
102 | ||
103 | if (fflag) { | |
104 | if (cflag) | |
105 | usage(); | |
106 | } else if (!cflag || dflag || sflag) | |
107 | usage(); | |
108 | ||
109 | if (*argv) | |
110 | for (; *argv; ++argv) { | |
111 | if (!(fp = fopen(*argv, "r"))) { | |
112 | (void)fprintf(stderr, | |
113 | "cut: %s: %s\n", *argv, strerror(errno)); | |
114 | exit(1); | |
115 | } | |
116 | fcn(fp, *argv); | |
117 | } | |
118 | else | |
119 | fcn(stdin, "stdin"); | |
120 | exit(0); | |
121 | } | |
122 | ||
123 | int autostart, autostop, maxval; | |
124 | ||
125 | char positions[_POSIX2_LINE_MAX + 1]; | |
126 | ||
127 | get_list(list) | |
128 | char *list; | |
129 | { | |
130 | register char *pos; | |
131 | register int setautostart, start, stop; | |
132 | char *p, *strtok(); | |
133 | ||
134 | /* | |
135 | * set a byte in the positions array to indicate if a field or | |
136 | * column is to be selected; use +1, it's 1-based, not 0-based. | |
137 | * This parser is less restrictive than the Draft 9 POSIX spec. | |
138 | * POSIX doesn't allow lists that aren't in increasing order or | |
139 | * overlapping lists. We also handle "-3-5" although there's no | |
140 | * real reason too. | |
141 | */ | |
142 | for (; p = strtok(list, ", \t"); list = NULL) { | |
143 | setautostart = start = stop = 0; | |
144 | if (*p == '-') { | |
145 | ++p; | |
146 | setautostart = 1; | |
147 | } | |
148 | if (isdigit(*p)) { | |
149 | start = stop = strtol(p, &p, 10); | |
150 | if (setautostart && start > autostart) | |
151 | autostart = start; | |
152 | } | |
153 | if (*p == '-') { | |
154 | if (isdigit(p[1])) | |
155 | stop = strtol(p + 1, &p, 10); | |
156 | if (*p == '-') { | |
157 | ++p; | |
158 | if (!autostop || autostop > stop) | |
159 | autostop = stop; | |
160 | } | |
161 | } | |
162 | if (*p) | |
163 | badlist("illegal list value"); | |
164 | if (!stop || !start) | |
165 | badlist("values may not include zero"); | |
166 | if (stop > _POSIX2_LINE_MAX) { | |
167 | /* positions used rather than allocate a new buffer */ | |
168 | (void)sprintf(positions, "%d too large (max %d)", | |
169 | stop, _POSIX2_LINE_MAX); | |
170 | badlist(positions); | |
171 | } | |
172 | if (maxval < stop) | |
173 | maxval = stop; | |
174 | for (pos = positions + start; start++ <= stop; *pos++ = 1); | |
175 | } | |
176 | ||
177 | /* overlapping ranges */ | |
178 | if (autostop && maxval > autostop) | |
179 | maxval = autostop; | |
180 | ||
181 | /* set autostart */ | |
182 | if (autostart) | |
183 | memset(positions + 1, '1', autostart); | |
184 | } | |
185 | ||
186 | /* ARGSUSED */ | |
187 | c_cut(fp, fname) | |
188 | FILE *fp; | |
189 | char *fname; | |
190 | { | |
191 | register int ch, col; | |
192 | register char *pos; | |
193 | ||
194 | for (;;) { | |
195 | pos = positions + 1; | |
196 | for (col = maxval; col; --col) { | |
197 | if ((ch = getc(fp)) == EOF) | |
198 | return; | |
199 | if (ch == '\n') | |
200 | break; | |
201 | if (*pos++) | |
202 | putchar(ch); | |
203 | } | |
204 | if (ch != '\n') | |
205 | if (autostop) | |
206 | while ((ch = getc(fp)) != EOF && ch != '\n') | |
207 | putchar(ch); | |
208 | else | |
209 | while ((ch = getc(fp)) != EOF && ch != '\n'); | |
210 | putchar('\n'); | |
211 | } | |
212 | } | |
213 | ||
214 | f_cut(fp, fname) | |
215 | FILE *fp; | |
216 | char *fname; | |
217 | { | |
218 | register int ch, field, isdelim; | |
219 | register char *pos, *p, sep; | |
220 | int output; | |
221 | char lbuf[_POSIX2_LINE_MAX + 1]; | |
222 | ||
223 | for (sep = dchar, output = 0; fgets(lbuf, sizeof(lbuf), fp); output = 0) { | |
224 | for (isdelim = 0, p = lbuf;; ++p) { | |
225 | if (!(ch = *p)) { | |
226 | (void)fprintf(stderr, | |
227 | "cut: %s: line too long.\n", fname); | |
228 | exit(1); | |
229 | } | |
230 | /* this should work if newline is delimiter */ | |
231 | if (ch == sep) | |
232 | isdelim = 1; | |
233 | if (ch == '\n') { | |
234 | if (!isdelim && !sflag) | |
235 | (void)printf("%s", lbuf); | |
236 | break; | |
237 | } | |
238 | } | |
239 | if (!isdelim) | |
240 | continue; | |
241 | ||
242 | pos = positions + 1; | |
243 | for (field = maxval, p = lbuf; field; --field, ++pos) { | |
244 | if (*pos) { | |
245 | if (output++) | |
246 | putchar(sep); | |
247 | while ((ch = *p++) != '\n' && ch != sep) | |
248 | putchar(ch); | |
249 | } else | |
250 | while ((ch = *p++) != '\n' && ch != sep); | |
251 | if (ch == '\n') | |
252 | break; | |
253 | } | |
254 | if (ch != '\n') | |
255 | if (autostop) { | |
256 | if (output) | |
257 | putchar(sep); | |
258 | for (; (ch = *p) != '\n'; ++p) | |
259 | putchar(ch); | |
260 | } else | |
261 | for (; (ch = *p) != '\n'; ++p); | |
262 | putchar('\n'); | |
263 | } | |
264 | } | |
265 | ||
266 | badlist(msg) | |
267 | char *msg; | |
268 | { | |
269 | (void)fprintf(stderr, "cut: [-cf] list: %s.\n", msg); | |
270 | exit(1); | |
271 | } | |
272 | ||
273 | usage() | |
274 | { | |
275 | (void)fprintf(stderr, | |
276 | "usage:\tcut -c list [file1 ...]\n\tcut -f list [-s] [-d delim] [file ...]\n"); | |
277 | exit(1); | |
278 | } |