2 * Copyright (c) 1999 The NetBSD Foundation, Inc.
5 * This code is derived from software contributed to The NetBSD Foundation
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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 NetBSD
19 * Foundation, Inc. and its contributors.
20 * 4. Neither the name of The NetBSD Foundation nor the names of its
21 * contributors may be used to endorse or promote products derived
22 * from this software without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
25 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
26 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
28 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
37 #include <sys/cdefs.h>
40 "@(#) Copyright (c) 1999\
41 The NetBSD Foundation, Inc. All rights reserved.");
45 #include <sys/types.h>
59 number_all, /* number all lines */
60 number_nonempty, /* number non-empty lines */
61 number_none, /* no line numbering */
62 number_regex /* number lines matching regular expression */
65 struct numbering_property {
66 const char * const name; /* for diagnostics */
67 numbering_type type; /* numbering type */
68 regex_t expr; /* for type == number_regex */
71 /* line numbering formats */
72 #define FORMAT_LN "%-*d" /* left justified, leading zeros suppressed */
73 #define FORMAT_RN "%*d" /* right justified, leading zeros suppressed */
74 #define FORMAT_RZ "%0*d" /* right justified, leading zeros kept */
79 #define NP_LAST HEADER
81 static struct numbering_property numbering_properties[NP_LAST + 1] = {
82 { "footer", number_none },
83 { "body", number_nonempty },
84 { "header", number_none }
87 #define max(a, b) ((a) > (b) ? (a) : (b))
90 * Maximum number of characters required for a decimal representation of a
91 * (signed) int; courtesy of tzcode.
93 #define INT_STRLEN_MAXIMUM \
94 ((sizeof (int) * CHAR_BIT - 1) * 302 / 1000 + 2)
96 static void filter(void);
97 static void parse_numbering(const char *, int);
98 static void usage(void);
101 * Pointer to dynamically allocated input line buffer, and its size.
104 static size_t buffersize;
107 * Dynamically allocated buffer suitable for string representation of ints.
109 static char *intbuffer;
111 /* delimiter characters that indicate the start of a logical page section */
112 static char delim[2 * MB_LEN_MAX];
116 * Configurable parameters.
119 /* line numbering format */
120 static const char *format = FORMAT_RN;
122 /* increment value used to number logical page lines */
125 /* number of adjacent blank lines to be considered (and numbered) as one */
126 static unsigned int nblank = 1;
128 /* whether to restart numbering at logical page delimiters */
129 static int restart = 1;
131 /* characters used in separating the line number and the corrsp. text line */
132 static const char *sep = "\t";
134 /* initial value used to number logical page lines */
135 static int startnum = 1;
137 /* number of characters to be used for the line number */
138 /* should be unsigned but required signed by `*' precision conversion */
139 static int width = 6;
151 size_t intbuffersize, clen;
152 char delim1[MB_LEN_MAX] = { '\\' }, delim2[MB_LEN_MAX] = { ':' };
153 size_t delim1len = 1, delim2len = 1;
155 (void)setlocale(LC_ALL, "");
157 while ((c = getopt(argc, argv, "pb:d:f:h:i:l:n:s:v:w:")) != -1) {
163 parse_numbering(optarg, BODY);
166 clen = mbrlen(optarg, MB_CUR_MAX, NULL);
167 if (clen == (size_t)-1 || clen == (size_t)-2)
168 errc(EXIT_FAILURE, EILSEQ, NULL);
170 memcpy(delim1, optarg, delim1len = clen);
171 clen = mbrlen(optarg + delim1len,
173 if (clen == (size_t)-1 ||
175 errc(EXIT_FAILURE, EILSEQ, NULL);
177 memcpy(delim2, optarg + delim1len,
179 if (optarg[delim1len + clen] != '\0')
181 "invalid delim argument -- %s",
187 parse_numbering(optarg, FOOTER);
190 parse_numbering(optarg, HEADER);
194 val = strtol(optarg, &ep, 10);
195 if ((ep != NULL && *ep != '\0') ||
196 ((val == LONG_MIN || val == LONG_MAX) && errno != 0))
198 "invalid incr argument -- %s", optarg);
203 uval = strtoul(optarg, &ep, 10);
204 if ((ep != NULL && *ep != '\0') ||
205 (uval == ULONG_MAX && errno != 0))
207 "invalid num argument -- %s", optarg);
208 nblank = (unsigned int)uval;
211 if (strcmp(optarg, "ln") == 0) {
213 } else if (strcmp(optarg, "rn") == 0) {
215 } else if (strcmp(optarg, "rz") == 0) {
219 "illegal format -- %s", optarg);
226 val = strtol(optarg, &ep, 10);
227 if ((ep != NULL && *ep != '\0') ||
228 ((val == LONG_MIN || val == LONG_MAX) && errno != 0))
230 "invalid startnum value -- %s", optarg);
235 val = strtol(optarg, &ep, 10);
236 if ((ep != NULL && *ep != '\0') ||
237 ((val == LONG_MIN || val == LONG_MAX) && errno != 0))
239 "invalid width value -- %s", optarg);
243 "width argument must be > 0 -- %d",
259 if (freopen(argv[0], "r", stdin) == NULL)
260 err(EXIT_FAILURE, "%s", argv[0]);
267 /* Generate the delimiter sequence */
268 memcpy(delim, delim1, delim1len);
269 memcpy(delim + delim1len, delim2, delim2len);
270 delimlen = delim1len + delim2len;
272 /* Determine the maximum input line length to operate on. */
273 if ((val = sysconf(_SC_LINE_MAX)) == -1) /* ignore errno */
275 /* Allocate sufficient buffer space (including the terminating NUL). */
276 buffersize = (size_t)val + 1;
277 if ((buffer = malloc(buffersize)) == NULL)
278 err(EXIT_FAILURE, "cannot allocate input line buffer");
280 /* Allocate a buffer suitable for preformatting line number. */
281 intbuffersize = max(INT_STRLEN_MAXIMUM, width) + 1; /* NUL */
282 if ((intbuffer = malloc(intbuffersize)) == NULL)
283 err(EXIT_FAILURE, "cannot allocate preformatting buffer");
295 int line; /* logical line number */
296 int section; /* logical page section */
297 unsigned int adjblank; /* adjacent blank lines */
298 int consumed; /* intbuffer measurement */
305 (void)&donumber; /* avoid bogus `uninitialized' warning */
308 while (fgets(buffer, (int)buffersize, stdin) != NULL) {
309 for (idx = FOOTER; idx <= NP_LAST; idx++) {
310 /* Does it look like a delimiter? */
311 if (memcmp(buffer + delimlen * idx, delim,
313 /* Was this the whole line? */
314 if (buffer[delimlen * (idx + 1)] == '\n') {
326 switch (numbering_properties[section].type) {
329 * Doing this for number_all only is disputable, but
330 * the standard expresses an explicit dependency on
333 if (buffer[0] == '\n' && ++adjblank < nblank)
336 donumber = 1, adjblank = 0;
338 case number_nonempty:
339 donumber = (buffer[0] != '\n');
346 (regexec(&numbering_properties[section].expr,
347 buffer, 0, NULL, 0) == 0);
352 /* Note: sprintf() is safe here. */
353 consumed = sprintf(intbuffer, format, width, line);
355 intbuffer + max(0, consumed - width));
358 (void)printf("%*s", width, "");
360 (void)printf("%s%s", sep, buffer);
363 err(EXIT_FAILURE, "output error");
369 err(EXIT_FAILURE, "input error");
373 * Various support functions.
377 parse_numbering(argstr, section)
382 char errorbuf[NL_TEXTMAX];
386 numbering_properties[section].type = number_all;
389 numbering_properties[section].type = number_none;
392 numbering_properties[section].type = number_nonempty;
395 /* If there was a previous expression, throw it away. */
396 if (numbering_properties[section].type == number_regex)
397 regfree(&numbering_properties[section].expr);
399 numbering_properties[section].type = number_regex;
401 /* Compile/validate the supplied regular expression. */
402 if ((error = regcomp(&numbering_properties[section].expr,
403 &argstr[1], REG_NEWLINE|REG_NOSUB)) != 0) {
404 (void)regerror(error,
405 &numbering_properties[section].expr,
406 errorbuf, sizeof (errorbuf));
409 numbering_properties[section].name, errorbuf,
415 "illegal %s line numbering type -- %s",
416 numbering_properties[section].name, argstr);
424 (void)fprintf(stderr,
425 "usage: nl [-p] [-b type] [-d delim] [-f type] [-h type] [-i incr] [-l num]\n"
426 " [-n format] [-s sep] [-v startnum] [-w width] [file]\n");