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authorErik Andersen <andersen@codepoet.org>2000-05-12 19:41:47 +0000
committerErik Andersen <andersen@codepoet.org>2000-05-12 19:41:47 +0000
commit7ab9c7ee52db8759d457819f5480378fa3aa97cc (patch)
tree37ef0fb8b142a4925b866c7caa5207b71b4ecae6 /coreutils/cut.c
parent3d427ac5efd249dc25dd03deb30520335f68911a (diff)
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Lots of updates. Finished implementing BB_FEATURE_TRIVIAL_HELP
which lets you compile out most of the "--help" output, saving up to 17k. Renamed mnc to nc. -Erik
Diffstat (limited to 'coreutils/cut.c')
-rw-r--r--coreutils/cut.c372
1 files changed, 372 insertions, 0 deletions
diff --git a/coreutils/cut.c b/coreutils/cut.c
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1/* vi: set sw=4 ts=4: */
2/*
3 * cut implementation for busybox
4 *
5 * Copyright (c) Michael J. Holme
6 *
7 * This version of cut is adapted from Minix cut and was modified
8 * by Erik Andersen <andersee@debian.org> to be used in busybox.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 * Original copyright notice is retained at the end of this file.
25 */
26
27#include "internal.h"
28#include <sys/types.h>
29#include <ctype.h>
30#include <string.h>
31#include <errno.h>
32#include <stdlib.h>
33#include <stdio.h>
34#define BB_DECLARE_EXTERN
35#define bb_need_help
36#include "messages.c"
37
38#define MAX_FIELD 80 /* Pointers to the beginning of each field
39 * are stored in columns[], if a line holds
40 * more than MAX_FIELD columns the array
41 * boundary is exceed. But unlikely at 80 */
42
43#define MAX_ARGS 32 /* Maximum number of fields following -f or
44 * -c switches */
45int args[MAX_ARGS * 2];
46int num_args;
47
48/* Lots of new defines, should easen maintainance... */
49#define DUMP_STDIN 0 /* define for mode: no options */
50#define OPTIONF 1 /* define for mode: option -f */
51#define OPTIONC 2 /* define for mode: option -c */
52#define OPTIONB 3 /* define for mode: option -b */
53#define NOTSET 0 /* option not selected */
54#define SET 1 /* option selected */
55
56/* Defines for the warnings */
57#define DELIMITER_NOT_APPLICABLE 0
58#define OVERRIDING_PREVIOUS_MODE 1
59#define OPTION_NOT_APPLICABLE 2
60#define UNKNOWN_OPTION 3
61#define FILE_NOT_READABLE 4
62
63/* Defines for the fatal errors */
64#define SYNTAX_ERROR 101
65#define POSITION_ERROR 102
66#define LINE_TO_LONG_ERROR 103
67#define RANGE_ERROR 104
68#define MAX_FIELDS_EXEEDED_ERROR 105
69#define MAX_ARGS_EXEEDED_ERROR 106
70
71
72int mode; /* 0 = dump stdin to stdout, 1=-f, 2=-c */
73char delim = '\t'; /* default delimiting character */
74FILE *fd;
75char *name;
76char line[BUFSIZ];
77int exit_status;
78
79int cut_main(int argc, char **argv);
80void warn(int warn_number, char *option);
81void cuterror(int err);
82void get_args(void);
83void cut(void);
84
85void warn(int warn_number, char *option)
86{
87 static char *warn_msg[] = {
88 "%s: Option -d allowed only with -f\n",
89 "%s: -%s overrides earlier option\n",
90 "%s: -%s not allowed in current mode\n",
91 "%s: Cannot open %s\n"
92 };
93
94 fprintf(stderr, warn_msg[warn_number], name, option);
95 exit_status = warn_number + 1;
96
97}
98
99void cuterror(int err)
100{
101 static char *err_mes[] = {
102 "%s: syntax error\n",
103 "%s: position must be >0\n",
104 "%s: line longer than BUFSIZ\n",
105 "%s: range must not decrease from left to right\n",
106 "%s: MAX_FIELD exceeded\n",
107 "%s: MAX_ARGS exceeded\n"
108 };
109
110 fprintf(stderr, err_mes[err - 101], name);
111 exit(err);
112}
113
114
115void get_args()
116{
117 int i = 0;
118 int arg_ptr = 0;
119 int flag;
120
121 num_args = 0;
122 do {
123 if (num_args == MAX_ARGS)
124 cuterror(MAX_ARGS_EXEEDED_ERROR);
125 if (!isdigit(line[i]) && line[i] != '-')
126 cuterror(SYNTAX_ERROR);
127
128 args[arg_ptr] = 1;
129 args[arg_ptr + 1] = BUFSIZ;
130 flag = 1;
131
132 while (line[i] != ',' && line[i] != 0) {
133 if (isdigit(line[i])) {
134 args[arg_ptr] = 0;
135 while (isdigit(line[i]))
136 args[arg_ptr] = 10 * args[arg_ptr] + line[i++] - '0';
137 if (!args[arg_ptr])
138 cuterror(POSITION_ERROR);
139 arg_ptr++;
140 }
141 if (line[i] == '-') {
142 arg_ptr |= 1;
143 i++;
144 flag = 0;
145 }
146 }
147 if (flag && arg_ptr & 1)
148 args[arg_ptr] = args[arg_ptr - 1];
149 if (args[num_args * 2] > args[num_args * 2 + 1])
150 cuterror(RANGE_ERROR);
151 num_args++;
152 arg_ptr = num_args * 2;
153 }
154 while (line[i++]);
155}
156
157
158void cut()
159{
160 int i, j, length, maxcol=0;
161 char *columns[MAX_FIELD];
162
163 while (fgets(line, BUFSIZ, fd)) {
164 length = strlen(line) - 1;
165 *(line + length) = 0;
166 switch (mode) {
167 case DUMP_STDIN:
168 printf("%s", line);
169 break;
170 case OPTIONF:
171 columns[maxcol++] = line;
172 for (i = 0; i < length; i++) {
173 if (*(line + i) == delim) {
174 *(line + i) = 0;
175 if (maxcol == MAX_FIELD)
176 cuterror(MAX_FIELDS_EXEEDED_ERROR);
177 columns[maxcol] = line + i + 1;
178 maxcol++;
179 }
180 }
181 if (maxcol != 1) {
182 for (i = 0; i < num_args; i++) {
183 for (j = args[i * 2]; j <= args[i * 2 + 1]; j++)
184 if (j <= maxcol) {
185 printf("%s", columns[j - 1]);
186 if (i != num_args - 1 || j != args[i * 2 + 1])
187 putchar(delim);
188 }
189 }
190 }
191 break;
192 case OPTIONC:
193 for (i = 0; i < num_args; i++) {
194 for (j = args[i * 2];
195 j <= (args[i * 2 + 1] >
196 length ? length : args[i * 2 + 1]); j++)
197 putchar(*(line + j - 1));
198 }
199 }
200 if (maxcol != 1)
201 putchar('\n');
202 }
203}
204
205
206int cut_main(int argc, char **argv)
207{
208 int i = 1;
209 int numberFilenames = 0;
210
211 name = argv[0];
212
213 if (argc == 1 || strcmp(argv[1], dash_dash_help)==0)
214 usage( "cut [OPTION]... [FILE]...\n"
215#ifndef BB_FEATURE_TRIVIAL_HELP
216 "\nPrints selected fields from each input FILE to standard output.\n\n"
217 "Options:\n"
218 "\t-b LIST\tOutput only bytes from LIST\n"
219 "\t-c LIST\tOutput only characters from LIST\n"
220 "\t-d DELIM\tUse DELIM instead of tab as the field delimiter\n"
221 "\t-f N\tPrint only these fields\n"
222 "\t-n\tIgnored\n"
223#endif
224 );
225
226 while (i < argc) {
227 if (argv[i][0] == '-') {
228 switch (argv[i++][1]) {
229 case 'd':
230 if (mode == OPTIONC || mode == OPTIONB)
231 warn(DELIMITER_NOT_APPLICABLE, "d");
232 delim = argv[i++][0];
233 break;
234 case 'f':
235 sprintf(line, "%s", argv[i++]);
236 if (mode == OPTIONC || mode == OPTIONB)
237 warn(OVERRIDING_PREVIOUS_MODE, "f");
238 mode = OPTIONF;
239 break;
240 case 'b':
241 sprintf(line, "%s", argv[i++]);
242 if (mode == OPTIONF || mode == OPTIONC)
243 warn(OVERRIDING_PREVIOUS_MODE, "b");
244 mode = OPTIONB;
245 break;
246 case 'c':
247 sprintf(line, "%s", argv[i++]);
248 if (mode == OPTIONF || mode == OPTIONB)
249 warn(OVERRIDING_PREVIOUS_MODE, "c");
250 mode = OPTIONC;
251 break;
252 case '\0': /* - means: read from stdin */
253 numberFilenames++;
254 break;
255 case 'n': /* needed for Posix, but no effect here */
256 if (mode != OPTIONB)
257 warn(OPTION_NOT_APPLICABLE, "n");
258 break;
259 default:
260 warn(UNKNOWN_OPTION, &(argv[i - 1][1]));
261 }
262 } else {
263 i++;
264 numberFilenames++;
265 }
266 }
267
268/* Here follow the checks, if the selected options are reasonable. */
269 if (mode == OPTIONB) /* since in Minix char := byte */
270 mode = OPTIONC;
271 get_args();
272 if (numberFilenames != 0) {
273 i = 1;
274 while (i < argc) {
275 if (argv[i][0] == '-') {
276 switch (argv[i][1]) {
277 case 'f':
278 case 'c':
279 case 'b':
280 case 'd':
281 i += 2;
282 break;
283 case 'n':
284 case 'i':
285 case 's':
286 i++;
287 break;
288 case '\0':
289 fd = stdin;
290 i++;
291 cut();
292 break;
293 default:
294 i++;
295 }
296 } else {
297 if ((fd = fopen(argv[i++], "r")) == NULL) {
298 warn(FILE_NOT_READABLE, argv[i - 1]);
299 } else {
300 cut();
301 fclose(fd);
302 }
303 }
304 }
305 } else {
306 fd = stdin;
307 cut();
308 }
309
310 exit(exit_status);
311}
312
313/* cut - extract columns from a file or stdin. Author: Michael J. Holme
314 *
315 * Copyright 1989, Michael John Holme, All rights reserved.
316 * This code may be freely distributed, provided that this notice
317 * remains intact.
318 *
319 * V1.1: 6th September 1989
320 *
321 * Bugs, criticisms, etc,
322 * c/o Mark Powell
323 * JANET sq79@uk.ac.liv
324 * ARPA sq79%liv.ac.uk@nsfnet-relay.ac.uk
325 * UUCP ...!mcvax!ukc!liv.ac.uk!sq79
326 *-------------------------------------------------------------------------
327 * Changed for POSIX1003.2/Draft10 conformance
328 * Thomas Brupbacher (tobr@mw.lpc.ethz.ch), September 1990.
329 * Changes:
330 * - separation of error messages ( stderr) and output (stdout).
331 * - support for -b and -n (no effect, -b acts as -c)
332 * - support for -s
333 *-------------------------------------------------------------------------
334 */
335
336/*
337 * Copyright (c) 1987,1997, Prentice Hall
338 * All rights reserved.
339 *
340 * Redistribution and use of the MINIX operating system in source and
341 * binary forms, with or without modification, are permitted provided
342 * that the following conditions are met:
343 *
344 * Redistributions of source code must retain the above copyright
345 * notice, this list of conditions and the following disclaimer.
346 *
347 * Redistributions in binary form must reproduce the above
348 * copyright notice, this list of conditions and the following
349 * disclaimer in the documentation and/or other materials provided
350 * with the distribution.
351 *
352 * Neither the name of Prentice Hall nor the names of the software
353 * authors or contributors may be used to endorse or promote
354 * products derived from this software without specific prior
355 * written permission.
356 *
357 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS, AUTHORS, AND
358 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
359 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
360 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
361 * IN NO EVENT SHALL PRENTICE HALL OR ANY AUTHORS OR CONTRIBUTORS BE
362 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
363 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
364 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
365 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
366 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
367 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
368 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
369 *
370 */
371
372
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