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>
57 number_all, /* number all lines */
58 number_nonempty, /* number non-empty lines */
59 number_none, /* no line numbering */
60 number_regex /* number lines matching regular expression */
63 struct numbering_property {
64 const char * const name; /* for diagnostics */
65 numbering_type type; /* numbering type */
66 regex_t expr; /* for type == number_regex */
69 /* line numbering formats */
70 #define FORMAT_LN "%-*d" /* left justified, leading zeros suppressed */
71 #define FORMAT_RN "%*d" /* right justified, leading zeros suppressed */
72 #define FORMAT_RZ "%0*d" /* right justified, leading zeros kept */
77 #define NP_LAST HEADER
79 static struct numbering_property numbering_properties[NP_LAST + 1] = {
80 { "footer", number_none },
81 { "body", number_nonempty },
82 { "header", number_none }
85 #define max(a, b) ((a) > (b) ? (a) : (b))
88 * Maximum number of characters required for a decimal representation of a
89 * (signed) int; courtesy of tzcode.
91 #define INT_STRLEN_MAXIMUM \
92 ((sizeof (int) * CHAR_BIT - 1) * 302 / 1000 + 2)
94 static void filter __P((void));
95 int main __P((int, char *[]));
96 static void parse_numbering __P((const char *, int));
97 static void usage __P((void));
100 * Pointer to dynamically allocated input line buffer, and its size.
103 static size_t buffersize;
106 * Dynamically allocated buffer suitable for string representation of ints.
108 static char *intbuffer;
111 * Configurable parameters.
113 /* delimiter characters that indicate the start of a logical page section */
114 static char delim[2] = { '\\', ':' };
116 /* line numbering format */
117 static const char *format = FORMAT_RN;
119 /* increment value used to number logical page lines */
122 /* number of adjacent blank lines to be considered (and numbered) as one */
123 static unsigned int nblank = 1;
125 /* whether to restart numbering at logical page delimiters */
126 static int restart = 1;
128 /* characters used in separating the line number and the corrsp. text line */
129 static const char *sep = "\t";
131 /* initial value used to number logical page lines */
132 static int startnum = 1;
134 /* number of characters to be used for the line number */
135 /* should be unsigned but required signed by `*' precision conversion */
136 static int width = 6;
148 size_t intbuffersize;
150 (void)setlocale(LC_ALL, "");
153 * Note: this implementation strictly conforms to the XBD Utility
154 * Syntax Guidelines and does not permit the optional `file' operand
155 * to be intermingled with the options, which is defined in the
156 * XCU specification (Issue 5) but declared an obsolescent feature that
157 * will be removed from a future issue. It shouldn't matter, though.
159 while ((c = getopt(argc, argv, "pb:d:f:h:i:l:n:s:v:w:")) != -1) {
165 parse_numbering(optarg, BODY);
168 if (optarg[0] != '\0')
169 delim[0] = optarg[0];
170 if (optarg[1] != '\0')
171 delim[1] = optarg[1];
172 /* at most two delimiter characters */
173 if (optarg[2] != '\0') {
174 (void)fprintf(stderr,
175 "nl: invalid delim argument -- %s\n",
182 parse_numbering(optarg, FOOTER);
185 parse_numbering(optarg, HEADER);
189 val = strtol(optarg, &ep, 10);
190 if ((ep != NULL && *ep != '\0') ||
191 ((val == LONG_MIN || val == LONG_MAX) && errno != 0)) {
192 (void)fprintf(stderr,
193 "invalid incr argument -- %s\n", optarg);
200 uval = strtoul(optarg, &ep, 10);
201 if ((ep != NULL && *ep != '\0') ||
202 (uval == ULONG_MAX && errno != 0)) {
203 (void)fprintf(stderr,
204 "invalid num argument -- %s\n", optarg);
207 nblank = (unsigned int)uval;
210 if (strcmp(optarg, "ln") == 0) {
212 } else if (strcmp(optarg, "rn") == 0) {
214 } else if (strcmp(optarg, "rz") == 0) {
217 (void)fprintf(stderr,
218 "nl: illegal format -- %s\n", optarg);
227 val = strtol(optarg, &ep, 10);
228 if ((ep != NULL && *ep != '\0') ||
229 ((val == LONG_MIN || val == LONG_MAX) && errno != 0)) {
230 (void)fprintf(stderr,
231 "invalid startnum value -- %s\n", optarg);
238 val = strtol(optarg, &ep, 10);
239 if ((ep != NULL && *ep != '\0') ||
240 ((val == LONG_MIN || val == LONG_MAX) && errno != 0)) {
241 (void)fprintf(stderr,
242 "invalid width value -- %s\n", optarg);
247 (void)fprintf(stderr,
248 "nl: width argument must be > 0 -- %d\n",
266 if (freopen(argv[0], "r", stdin) == NULL) {
276 /* Determine the maximum input line length to operate on. */
277 if ((val = sysconf(_SC_LINE_MAX)) == -1) /* ignore errno */
279 /* Allocate sufficient buffer space (including the terminating NUL). */
280 buffersize = (size_t)val + 1;
281 if ((buffer = malloc(buffersize)) == NULL) {
282 perror("cannot allocate input line buffer");
286 /* Allocate a buffer suitable for preformatting line number. */
287 intbuffersize = max(INT_STRLEN_MAXIMUM, width) + 1; /* NUL */
288 if ((intbuffer = malloc(intbuffersize)) == NULL) {
289 perror("cannot allocate preformatting buffer");
303 int line; /* logical line number */
304 int section; /* logical page section */
305 unsigned int adjblank; /* adjacent blank lines */
306 int consumed; /* intbuffer measurement */
313 (void)&donumber; /* avoid bogus `uninitialized' warning */
316 while (fgets(buffer, (int)buffersize, stdin) != NULL) {
317 for (idx = FOOTER; idx <= NP_LAST; idx++) {
318 /* Does it look like a delimiter? */
319 if (buffer[2 * idx + 0] == delim[0] &&
320 buffer[2 * idx + 1] == delim[1]) {
321 /* Was this the whole line? */
322 if (buffer[2 * idx + 2] == '\n') {
334 switch (numbering_properties[section].type) {
337 * Doing this for number_all only is disputable, but
338 * the standard expresses an explicit dependency on
341 if (buffer[0] == '\n' && ++adjblank < nblank)
344 donumber = 1, adjblank = 0;
346 case number_nonempty:
347 donumber = (buffer[0] != '\n');
354 (regexec(&numbering_properties[section].expr,
355 buffer, 0, NULL, 0) == 0);
360 /* Note: sprintf() is safe here. */
361 consumed = sprintf(intbuffer, format, width, line);
363 intbuffer + max(0, consumed - width));
366 (void)printf("%*s", width, "");
368 (void)printf("%s%s", sep, buffer);
370 if (ferror(stdout)) {
371 perror("output error");
379 perror("input error");
385 * Various support functions.
389 parse_numbering(argstr, section)
394 char errorbuf[NL_TEXTMAX];
398 numbering_properties[section].type = number_all;
401 numbering_properties[section].type = number_none;
404 numbering_properties[section].type = number_nonempty;
407 /* If there was a previous expression, throw it away. */
408 if (numbering_properties[section].type == number_regex)
409 regfree(&numbering_properties[section].expr);
411 numbering_properties[section].type = number_regex;
413 /* Compile/validate the supplied regular expression. */
414 if ((error = regcomp(&numbering_properties[section].expr,
415 &argstr[1], REG_NEWLINE|REG_NOSUB)) != 0) {
416 (void)regerror(error,
417 &numbering_properties[section].expr,
418 errorbuf, sizeof (errorbuf));
419 (void)fprintf(stderr,
420 "nl: %s expr: %s -- %s\n",
421 numbering_properties[section].name, errorbuf,
427 (void)fprintf(stderr,
428 "nl: illegal %s line numbering type -- %s\n",
429 numbering_properties[section].name, argstr);
438 (void)fprintf(stderr, "usage: nl [-p] [-b type] [-d delim] [-f type] \
439 [-h type] [-i incr] [-l num]\n\t[-n format] [-s sep] [-v startnum] [-w width] \