1 /* nl -- number lines of files
2 Copyright (C) 1989, 1992, 1995 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>
31 #include "linebuffer.h"
41 /* Line-number formats. */
44 FORMAT_RIGHT_NOLZ, /* Right justified, no leading zeroes. */
45 FORMAT_RIGHT_LZ, /* Right justified, leading zeroes. */
46 FORMAT_LEFT /* Left justified, no leading zeroes. */
49 /* Default section delimiter characters. */
50 #define DEFAULT_SECTION_DELIMITERS "\\:"
52 /* Types of input lines: either one of the section delimiters,
56 Header, Body, Footer, Text
62 /* The name this program was run with. */
65 /* Format of body lines (-b). */
66 static char *body_type = "t";
68 /* Format of header lines (-h). */
69 static char *header_type = "n";
71 /* Format of footer lines (-f). */
72 static char *footer_type = "n";
74 /* Format currently being used (body, header, or footer). */
75 static char *current_type;
77 /* Regex for body lines to number (-bp). */
78 static struct re_pattern_buffer body_regex;
80 /* Regex for header lines to number (-hp). */
81 static struct re_pattern_buffer header_regex;
83 /* Regex for footer lines to number (-fp). */
84 static struct re_pattern_buffer footer_regex;
86 /* Pointer to current regex, if any. */
87 static struct re_pattern_buffer *current_regex = NULL;
89 /* Separator string to print after line number (-s). */
90 static char *separator_str = "\t";
92 /* Input section delimiter string (-d). */
93 static char *section_del = DEFAULT_SECTION_DELIMITERS;
95 /* Header delimiter string. */
96 static char *header_del = NULL;
98 /* Header section delimiter length. */
99 static int header_del_len;
101 /* Body delimiter string. */
102 static char *body_del = NULL;
104 /* Body section delimiter length. */
105 static int body_del_len;
107 /* Footer delimiter string. */
108 static char *footer_del = NULL;
110 /* Footer section delimiter length. */
111 static int footer_del_len;
114 static struct linebuffer line_buf;
116 /* printf format string for line number. */
117 static char *print_fmt;
119 /* printf format string for unnumbered lines. */
120 static char *print_no_line_fmt = NULL;
122 /* Starting line number on each page (-v). */
123 static int page_start = 1;
125 /* Line number increment (-i). */
126 static int page_incr = 1;
128 /* If TRUE, reset line number at start of each page (-p). */
129 static int reset_numbers = TRUE;
131 /* Number of blank lines to consider to be one line for numbering (-l). */
132 static int blank_join = 1;
134 /* Width of line numbers (-w). */
135 static int lineno_width = 6;
137 /* Line number format (-n). */
138 static enum number_format lineno_format = FORMAT_RIGHT_NOLZ;
140 /* Current print line number. */
143 /* Nonzero if we have ever read standard input. */
144 static int have_read_stdin;
146 /* If nonzero, display usage information and exit. */
147 static int show_help;
149 /* If nonzero, print the version on standard output then exit. */
150 static int show_version;
152 static struct option const longopts[] =
154 {"header-numbering", required_argument, NULL, 'h'},
155 {"body-numbering", required_argument, NULL, 'b'},
156 {"footer-numbering", required_argument, NULL, 'f'},
157 {"first-page", required_argument, NULL, 'v'},
158 {"page-increment", required_argument, NULL, 'i'},
159 {"no-renumber", no_argument, NULL, 'p'},
160 {"join-blank-lines", required_argument, NULL, 'l'},
161 {"number-separator", required_argument, NULL, 's'},
162 {"number-width", required_argument, NULL, 'w'},
163 {"number-format", required_argument, NULL, 'n'},
164 {"section-delimiter", required_argument, NULL, 'd'},
165 {"help", no_argument, &show_help, 1},
166 {"version", no_argument, &show_version, 1},
170 /* Print a usage message and quit. */
176 fprintf (stderr, _("Try `%s --help' for more information.\n"),
181 Usage: %s [OPTION]... [FILE]...\n\
185 Write each FILE to standard output, with line numbers added.\n\
186 With no FILE, or when FILE is -, read standard input.\n\
188 -b, --body-numbering=STYLE use STYLE for numbering body lines\n\
189 -d, --section-delimiter=CC use CC for separating logical pages\n\
190 -f, --footer-numbering=STYLE use STYLE for numbering footer lines\n\
191 -h, --header-numbering=STYLE use STYLE for numbering header lines\n\
192 -i, --page-increment=NUMBER line number increment at each line\n\
193 -l, --join-blank-lines=NUMBER group of NUMBER empty lines counted as one\n\
194 -n, --number-format=FORMAT insert line numbers according to FORMAT\n\
195 -p, --no-renumber do not reset line numbers at logical pages\n\
196 -s, --number-separator=STRING add STRING after (possible) line number\n\
197 -v, --first-page=NUMBER first line number on each logical page\n\
198 -w, --number-width=NUMBER use NUMBER columns for line numbers\n\
199 --help display this help and exit\n\
200 --version output version information and exit\n\
202 By default, selects -v1 -i1 -l1 -sTAB -w6 -nrn -hn -bt -fn. CC are\n\
203 two delimiter characters for separating logical pages, a missing\n\
204 second character implies :. Type \\\\ for \\. STYLE is one of:\n\
206 a number all lines\n\
207 t number only nonempty lines\n\
209 pREGEXP number only lines that contain a match for REGEXP\n\
213 ln left justified, no leading zeros\n\
214 rn right justified, no leading zeros\n\
215 rz right justified, leading zeros\n\
222 /* Build the printf format string, based on `lineno_format'. */
225 build_print_fmt (void)
227 /* 12 = 10 chars for lineno_width, 1 for %, 1 for \0. */
228 print_fmt = xmalloc (strlen (separator_str) + 12);
229 switch (lineno_format)
231 case FORMAT_RIGHT_NOLZ:
232 sprintf (print_fmt, "%%%dd%s", lineno_width, separator_str);
234 case FORMAT_RIGHT_LZ:
235 sprintf (print_fmt, "%%0%dd%s", lineno_width, separator_str);
238 sprintf (print_fmt, "%%-%dd%s", lineno_width, separator_str);
243 /* Set the command line flag TYPEP and possibly the regex pointer REGEXP,
244 according to `optarg'. */
247 build_type_arg (char **typep, struct re_pattern_buffer *regexp)
262 optlen = strlen (optarg);
263 regexp->allocated = optlen * 2;
264 regexp->buffer = (unsigned char *) xmalloc (regexp->allocated);
265 regexp->translate = NULL;
266 regexp->fastmap = xmalloc (256);
267 regexp->fastmap_accurate = 0;
268 errmsg = re_compile_pattern (optarg, optlen, regexp);
270 error (1, 0, "%s", errmsg);
279 /* Print and increment the line number. */
284 printf (print_fmt, line_no);
285 line_no += page_incr;
288 /* Switch to a header section. */
293 current_type = header_type;
294 current_regex = &header_regex;
296 line_no = page_start;
300 /* Switch to a body section. */
305 current_type = body_type;
306 current_regex = &body_regex;
310 /* Switch to a footer section. */
315 current_type = footer_type;
316 current_regex = &footer_regex;
320 /* Process a regular text line in `line_buf'. */
325 static int blank_lines = 0; /* Consecutive blank lines so far. */
327 switch (*current_type)
332 if (line_buf.length || ++blank_lines == blank_join)
338 printf (print_no_line_fmt);
347 printf (print_no_line_fmt);
350 printf (print_no_line_fmt);
353 if (re_search (current_regex, line_buf.buffer, line_buf.length,
354 0, line_buf.length, (struct re_registers *) 0) < 0)
355 printf (print_no_line_fmt);
360 fwrite (line_buf.buffer, sizeof (char), line_buf.length, stdout);
364 /* Return the type of line in `line_buf'. */
369 if (line_buf.length < 2 || memcmp (line_buf.buffer, section_del, 2))
371 if (line_buf.length == header_del_len
372 && !memcmp (line_buf.buffer, header_del, header_del_len))
374 if (line_buf.length == body_del_len
375 && !memcmp (line_buf.buffer, body_del, body_del_len))
377 if (line_buf.length == footer_del_len
378 && !memcmp (line_buf.buffer, footer_del, footer_del_len))
383 /* Read and process the file pointed to by FP. */
386 process_file (FILE *fp)
388 while (readline (&line_buf, fp))
390 switch ((int) check_section ())
408 /* Process file FILE to standard output.
409 Return 0 if successful, 1 if not. */
412 nl_file (const char *file)
416 if (!strcmp (file, "-"))
423 stream = fopen (file, "r");
426 error (0, errno, "%s", file);
431 process_file (stream);
435 error (0, errno, "%s", file);
438 if (!strcmp (file, "-"))
439 clearerr (stream); /* Also clear EOF. */
440 else if (fclose (stream) == EOF)
442 error (0, errno, "%s", file);
449 main (int argc, char **argv)
451 int c, exit_status = 0;
453 program_name = argv[0];
456 while ((c = getopt_long (argc, argv, "h:b:f:v:i:pl:s:w:n:d:", longopts,
465 if (build_type_arg (&header_type, &header_regex) != TRUE)
469 if (build_type_arg (&body_type, &body_regex) != TRUE)
473 if (build_type_arg (&footer_type, &footer_regex) != TRUE)
477 page_start = atoi (optarg);
480 page_incr = atoi (optarg);
485 reset_numbers = FALSE;
488 blank_join = atoi (optarg);
491 separator_str = optarg;
494 lineno_width = atoi (optarg);
495 if (lineno_width < 1)
502 if (optarg[1] == 'n')
503 lineno_format = FORMAT_LEFT;
511 lineno_format = FORMAT_RIGHT_NOLZ;
514 lineno_format = FORMAT_RIGHT_LZ;
527 section_del = optarg;
537 printf ("nl - %s\n", version_string);
544 /* Initialize the section delimiters. */
545 c = strlen (section_del);
547 header_del_len = c * 3;
548 header_del = xmalloc (header_del_len + 1);
549 strcat (strcat (strcpy (header_del, section_del), section_del), section_del);
551 body_del_len = c * 2;
552 body_del = xmalloc (body_del_len + 1);
553 strcat (strcpy (body_del, section_del), section_del);
556 footer_del = xmalloc (footer_del_len + 1);
557 strcpy (footer_del, section_del);
559 /* Initialize the input buffer. */
560 initbuffer (&line_buf);
562 /* Initialize the printf format for unnumbered lines. */
563 c = strlen (separator_str);
564 print_no_line_fmt = xmalloc (lineno_width + c + 1);
565 memset (print_no_line_fmt, ' ', lineno_width + c);
566 print_no_line_fmt[lineno_width + c] = '\0';
568 line_no = page_start;
569 current_type = body_type;
570 current_regex = &body_regex;
573 /* Main processing. */
576 exit_status |= nl_file ("-");
578 for (; optind < argc; optind++)
579 exit_status |= nl_file (argv[optind]);
581 if (have_read_stdin && fclose (stdin) == EOF)
583 error (0, errno, "-");
586 if (ferror (stdout) || fclose (stdout) == EOF)
587 error (1, errno, _("write error"));