1 /* nl -- number lines of files
2 Copyright (C) 89, 92, 95, 1996 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
18 /* Written by Scott Bartram (nancy!scott@uunet.uu.net)
19 Revised by David MacKenzie (djm@gnu.ai.mit.edu) */
24 #include <sys/types.h>
38 # define UINT_MAX ((unsigned int) ~(unsigned int) 0)
42 # define INT_MAX ((int) (UINT_MAX >> 1))
45 #include "linebuffer.h"
55 /* Line-number formats. */
58 FORMAT_RIGHT_NOLZ, /* Right justified, no leading zeroes. */
59 FORMAT_RIGHT_LZ, /* Right justified, leading zeroes. */
60 FORMAT_LEFT /* Left justified, no leading zeroes. */
63 /* Default section delimiter characters. */
64 #define DEFAULT_SECTION_DELIMITERS "\\:"
66 /* Types of input lines: either one of the section delimiters,
70 Header, Body, Footer, Text
76 /* The name this program was run with. */
79 /* Format of body lines (-b). */
80 static char *body_type = "t";
82 /* Format of header lines (-h). */
83 static char *header_type = "n";
85 /* Format of footer lines (-f). */
86 static char *footer_type = "n";
88 /* Format currently being used (body, header, or footer). */
89 static char *current_type;
91 /* Regex for body lines to number (-bp). */
92 static struct re_pattern_buffer body_regex;
94 /* Regex for header lines to number (-hp). */
95 static struct re_pattern_buffer header_regex;
97 /* Regex for footer lines to number (-fp). */
98 static struct re_pattern_buffer footer_regex;
100 /* Pointer to current regex, if any. */
101 static struct re_pattern_buffer *current_regex = NULL;
103 /* Separator string to print after line number (-s). */
104 static char *separator_str = "\t";
106 /* Input section delimiter string (-d). */
107 static char *section_del = DEFAULT_SECTION_DELIMITERS;
109 /* Header delimiter string. */
110 static char *header_del = NULL;
112 /* Header section delimiter length. */
113 static int header_del_len;
115 /* Body delimiter string. */
116 static char *body_del = NULL;
118 /* Body section delimiter length. */
119 static int body_del_len;
121 /* Footer delimiter string. */
122 static char *footer_del = NULL;
124 /* Footer section delimiter length. */
125 static int footer_del_len;
128 static struct linebuffer line_buf;
130 /* printf format string for line number. */
131 static char *print_fmt;
133 /* printf format string for unnumbered lines. */
134 static char *print_no_line_fmt = NULL;
136 /* Starting line number on each page (-v). */
137 static int starting_line_number = 1;
139 /* Line number increment (-i). */
140 static int page_incr = 1;
142 /* If TRUE, reset line number at start of each page (-p). */
143 static int reset_numbers = TRUE;
145 /* Number of blank lines to consider to be one line for numbering (-l). */
146 static int blank_join = 1;
148 /* Width of line numbers (-w). */
149 static int lineno_width = 6;
151 /* Line number format (-n). */
152 static enum number_format lineno_format = FORMAT_RIGHT_NOLZ;
154 /* Current print line number. */
157 /* Nonzero if we have ever read standard input. */
158 static int have_read_stdin;
160 /* If nonzero, display usage information and exit. */
161 static int show_help;
163 /* If nonzero, print the version on standard output then exit. */
164 static int show_version;
166 static struct option const longopts[] =
168 {"header-numbering", required_argument, NULL, 'h'},
169 {"body-numbering", required_argument, NULL, 'b'},
170 {"footer-numbering", required_argument, NULL, 'f'},
171 {"starting-line-number", required_argument, NULL, 'v'},
172 {"page-increment", required_argument, NULL, 'i'},
173 {"no-renumber", no_argument, NULL, 'p'},
174 {"join-blank-lines", required_argument, NULL, 'l'},
175 {"number-separator", required_argument, NULL, 's'},
176 {"number-width", required_argument, NULL, 'w'},
177 {"number-format", required_argument, NULL, 'n'},
178 {"section-delimiter", required_argument, NULL, 'd'},
179 {"help", no_argument, &show_help, 1},
180 {"version", no_argument, &show_version, 1},
184 /* Print a usage message and quit. */
190 fprintf (stderr, _("Try `%s --help' for more information.\n"),
195 Usage: %s [OPTION]... [FILE]...\n\
199 Write each FILE to standard output, with line numbers added.\n\
200 With no FILE, or when FILE is -, read standard input.\n\
202 -b, --body-numbering=STYLE use STYLE for numbering body lines\n\
203 -d, --section-delimiter=CC use CC for separating logical pages\n\
204 -f, --footer-numbering=STYLE use STYLE for numbering footer lines\n\
205 -h, --header-numbering=STYLE use STYLE for numbering header lines\n\
206 -i, --page-increment=NUMBER line number increment at each line\n\
207 -l, --join-blank-lines=NUMBER group of NUMBER empty lines counted as one\n\
208 -n, --number-format=FORMAT insert line numbers according to FORMAT\n\
209 -p, --no-renumber do not reset line numbers at logical pages\n\
210 -s, --number-separator=STRING add STRING after (possible) line number\n\
211 -v, --first-page=NUMBER first line number on each logical page\n\
212 -w, --number-width=NUMBER use NUMBER columns for line numbers\n\
213 --help display this help and exit\n\
214 --version output version information and exit\n\
216 By default, selects -v1 -i1 -l1 -sTAB -w6 -nrn -hn -bt -fn. CC are\n\
217 two delimiter characters for separating logical pages, a missing\n\
218 second character implies :. Type \\\\ for \\. STYLE is one of:\n\
220 a number all lines\n\
221 t number only nonempty lines\n\
223 pREGEXP number only lines that contain a match for REGEXP\n\
227 ln left justified, no leading zeros\n\
228 rn right justified, no leading zeros\n\
229 rz right justified, leading zeros\n\
233 exit (status == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
236 /* Build the printf format string, based on `lineno_format'. */
239 build_print_fmt (void)
241 /* 12 = 10 chars for lineno_width, 1 for %, 1 for \0. */
242 print_fmt = xmalloc (strlen (separator_str) + 12);
243 switch (lineno_format)
245 case FORMAT_RIGHT_NOLZ:
246 sprintf (print_fmt, "%%%dd%s", lineno_width, separator_str);
248 case FORMAT_RIGHT_LZ:
249 sprintf (print_fmt, "%%0%dd%s", lineno_width, separator_str);
252 sprintf (print_fmt, "%%-%dd%s", lineno_width, separator_str);
257 /* Set the command line flag TYPEP and possibly the regex pointer REGEXP,
258 according to `optarg'. */
261 build_type_arg (char **typep, struct re_pattern_buffer *regexp)
276 optlen = strlen (optarg);
277 regexp->allocated = optlen * 2;
278 regexp->buffer = (unsigned char *) xmalloc (regexp->allocated);
279 regexp->translate = NULL;
280 regexp->fastmap = xmalloc (256);
281 regexp->fastmap_accurate = 0;
282 errmsg = re_compile_pattern (optarg, optlen, regexp);
284 error (EXIT_FAILURE, 0, "%s", errmsg);
293 /* Print and increment the line number. */
298 printf (print_fmt, line_no);
299 line_no += page_incr;
302 /* Switch to a header section. */
307 current_type = header_type;
308 current_regex = &header_regex;
310 line_no = starting_line_number;
314 /* Switch to a body section. */
319 current_type = body_type;
320 current_regex = &body_regex;
324 /* Switch to a footer section. */
329 current_type = footer_type;
330 current_regex = &footer_regex;
334 /* Process a regular text line in `line_buf'. */
339 static int blank_lines = 0; /* Consecutive blank lines so far. */
341 switch (*current_type)
346 if (line_buf.length || ++blank_lines == blank_join)
352 printf (print_no_line_fmt);
361 printf (print_no_line_fmt);
364 printf (print_no_line_fmt);
367 if (re_search (current_regex, line_buf.buffer, line_buf.length,
368 0, line_buf.length, (struct re_registers *) 0) < 0)
369 printf (print_no_line_fmt);
374 fwrite (line_buf.buffer, sizeof (char), line_buf.length, stdout);
378 /* Return the type of line in `line_buf'. */
383 if (line_buf.length < 2 || memcmp (line_buf.buffer, section_del, 2))
385 if (line_buf.length == header_del_len
386 && !memcmp (line_buf.buffer, header_del, header_del_len))
388 if (line_buf.length == body_del_len
389 && !memcmp (line_buf.buffer, body_del, body_del_len))
391 if (line_buf.length == footer_del_len
392 && !memcmp (line_buf.buffer, footer_del, footer_del_len))
397 /* Read and process the file pointed to by FP. */
400 process_file (FILE *fp)
402 while (readline (&line_buf, fp))
404 switch ((int) check_section ())
422 /* Process file FILE to standard output.
423 Return 0 if successful, 1 if not. */
426 nl_file (const char *file)
430 if (!strcmp (file, "-"))
437 stream = fopen (file, "r");
440 error (0, errno, "%s", file);
445 process_file (stream);
449 error (0, errno, "%s", file);
452 if (!strcmp (file, "-"))
453 clearerr (stream); /* Also clear EOF. */
454 else if (fclose (stream) == EOF)
456 error (0, errno, "%s", file);
463 main (int argc, char **argv)
465 int c, exit_status = 0;
467 program_name = argv[0];
468 setlocale (LC_ALL, "");
469 bindtextdomain (PACKAGE, LOCALEDIR);
470 textdomain (PACKAGE);
474 while ((c = getopt_long (argc, argv, "h:b:f:v:i:pl:s:w:n:d:", longopts,
483 if (build_type_arg (&header_type, &header_regex) != TRUE)
487 if (build_type_arg (&body_type, &body_regex) != TRUE)
491 if (build_type_arg (&footer_type, &footer_regex) != TRUE)
497 if (xstrtol (optarg, NULL, 10, &tmp_long, NULL) != LONGINT_OK
498 /* Allow it to be negative. */
499 || tmp_long > INT_MAX)
500 error (EXIT_FAILURE, 0, _("invalid starting line number: `%s'"),
502 starting_line_number = (int) tmp_long;
508 if (xstrtol (optarg, NULL, 10, &tmp_long, NULL) != LONGINT_OK
509 || tmp_long <= 0 || tmp_long > INT_MAX)
510 error (EXIT_FAILURE, 0, _("invalid line number increment: `%s'"),
512 page_incr = (int) tmp_long;
516 reset_numbers = FALSE;
521 if (xstrtol (optarg, NULL, 10, &tmp_long, NULL) != LONGINT_OK
522 || tmp_long <= 0 || tmp_long > INT_MAX)
523 error (EXIT_FAILURE, 0, _("invalid number of blank lines: `%s'"),
525 blank_join = (int) tmp_long;
529 separator_str = optarg;
534 if (xstrtol (optarg, NULL, 10, &tmp_long, NULL) != LONGINT_OK
535 || tmp_long <= 0 || tmp_long > INT_MAX)
536 error (EXIT_FAILURE, 0,
537 _("invalid line number field width: `%s'"),
539 lineno_width = (int) tmp_long;
546 if (optarg[1] == 'n')
547 lineno_format = FORMAT_LEFT;
555 lineno_format = FORMAT_RIGHT_NOLZ;
558 lineno_format = FORMAT_RIGHT_LZ;
571 section_del = optarg;
581 printf ("nl - %s\n", PACKAGE_VERSION);
588 /* Initialize the section delimiters. */
589 c = strlen (section_del);
591 header_del_len = c * 3;
592 header_del = xmalloc (header_del_len + 1);
593 strcat (strcat (strcpy (header_del, section_del), section_del), section_del);
595 body_del_len = c * 2;
596 body_del = xmalloc (body_del_len + 1);
597 strcat (strcpy (body_del, section_del), section_del);
600 footer_del = xmalloc (footer_del_len + 1);
601 strcpy (footer_del, section_del);
603 /* Initialize the input buffer. */
604 initbuffer (&line_buf);
606 /* Initialize the printf format for unnumbered lines. */
607 c = strlen (separator_str);
608 print_no_line_fmt = xmalloc (lineno_width + c + 1);
609 memset (print_no_line_fmt, ' ', lineno_width + c);
610 print_no_line_fmt[lineno_width + c] = '\0';
612 line_no = starting_line_number;
613 current_type = body_type;
614 current_regex = &body_regex;
617 /* Main processing. */
620 exit_status |= nl_file ("-");
622 for (; optind < argc; optind++)
623 exit_status |= nl_file (argv[optind]);
625 if (have_read_stdin && fclose (stdin) == EOF)
627 error (0, errno, "-");
630 if (ferror (stdout) || fclose (stdout) == EOF)
631 error (EXIT_FAILURE, errno, _("write error"));
633 exit (exit_status == 0 ? EXIT_SUCCESS : EXIT_FAILURE);