home *** CD-ROM | disk | FTP | other *** search
- /* nl -- number lines of files
- Copyright (C) 89, 92, 95, 1996 Free Software Foundation, Inc.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
- /* Written by Scott Bartram (nancy!scott@uunet.uu.net)
- Revised by David MacKenzie (djm@gnu.ai.mit.edu) */
-
- #include <config.h>
-
- #include <stdio.h>
- #include <sys/types.h>
- #include <getopt.h>
-
- #if HAVE_LIMITS_H
- # include <limits.h>
- #endif
-
- #if WITH_REGEX
- # include <regex.h>
- #else
- # include <rx.h>
- #endif
-
- #ifndef UINT_MAX
- # define UINT_MAX ((unsigned int) ~(unsigned int) 0)
- #endif
-
- #ifndef INT_MAX
- # define INT_MAX ((int) (UINT_MAX >> 1))
- #endif
-
- #include "linebuffer.h"
- #include "system.h"
- #include "error.h"
- #include "xstrtol.h"
-
- #ifndef TRUE
- #define TRUE 1
- #define FALSE 0
- #endif
-
- /* Line-number formats. */
- enum number_format
- {
- FORMAT_RIGHT_NOLZ, /* Right justified, no leading zeroes. */
- FORMAT_RIGHT_LZ, /* Right justified, leading zeroes. */
- FORMAT_LEFT /* Left justified, no leading zeroes. */
- };
-
- /* Default section delimiter characters. */
- #define DEFAULT_SECTION_DELIMITERS "\\:"
-
- /* Types of input lines: either one of the section delimiters,
- or text to output. */
- enum section
- {
- Header, Body, Footer, Text
- };
-
- char *xmalloc ();
- char *xrealloc ();
-
- /* The name this program was run with. */
- char *program_name;
-
- /* Format of body lines (-b). */
- static char *body_type = "t";
-
- /* Format of header lines (-h). */
- static char *header_type = "n";
-
- /* Format of footer lines (-f). */
- static char *footer_type = "n";
-
- /* Format currently being used (body, header, or footer). */
- static char *current_type;
-
- /* Regex for body lines to number (-bp). */
- static struct re_pattern_buffer body_regex;
-
- /* Regex for header lines to number (-hp). */
- static struct re_pattern_buffer header_regex;
-
- /* Regex for footer lines to number (-fp). */
- static struct re_pattern_buffer footer_regex;
-
- /* Pointer to current regex, if any. */
- static struct re_pattern_buffer *current_regex = NULL;
-
- /* Separator string to print after line number (-s). */
- static char *separator_str = "\t";
-
- /* Input section delimiter string (-d). */
- static char *section_del = DEFAULT_SECTION_DELIMITERS;
-
- /* Header delimiter string. */
- static char *header_del = NULL;
-
- /* Header section delimiter length. */
- static int header_del_len;
-
- /* Body delimiter string. */
- static char *body_del = NULL;
-
- /* Body section delimiter length. */
- static int body_del_len;
-
- /* Footer delimiter string. */
- static char *footer_del = NULL;
-
- /* Footer section delimiter length. */
- static int footer_del_len;
-
- /* Input buffer. */
- static struct linebuffer line_buf;
-
- /* printf format string for line number. */
- static char *print_fmt;
-
- /* printf format string for unnumbered lines. */
- static char *print_no_line_fmt = NULL;
-
- /* Starting line number on each page (-v). */
- static int starting_line_number = 1;
-
- /* Line number increment (-i). */
- static int page_incr = 1;
-
- /* If TRUE, reset line number at start of each page (-p). */
- static int reset_numbers = TRUE;
-
- /* Number of blank lines to consider to be one line for numbering (-l). */
- static int blank_join = 1;
-
- /* Width of line numbers (-w). */
- static int lineno_width = 6;
-
- /* Line number format (-n). */
- static enum number_format lineno_format = FORMAT_RIGHT_NOLZ;
-
- /* Current print line number. */
- static int line_no;
-
- /* Nonzero if we have ever read standard input. */
- static int have_read_stdin;
-
- /* If nonzero, display usage information and exit. */
- static int show_help;
-
- /* If nonzero, print the version on standard output then exit. */
- static int show_version;
-
- static struct option const longopts[] =
- {
- {"header-numbering", required_argument, NULL, 'h'},
- {"body-numbering", required_argument, NULL, 'b'},
- {"footer-numbering", required_argument, NULL, 'f'},
- {"starting-line-number", required_argument, NULL, 'v'},
- {"page-increment", required_argument, NULL, 'i'},
- {"no-renumber", no_argument, NULL, 'p'},
- {"join-blank-lines", required_argument, NULL, 'l'},
- {"number-separator", required_argument, NULL, 's'},
- {"number-width", required_argument, NULL, 'w'},
- {"number-format", required_argument, NULL, 'n'},
- {"section-delimiter", required_argument, NULL, 'd'},
- {"help", no_argument, &show_help, 1},
- {"version", no_argument, &show_version, 1},
- {NULL, 0, NULL, 0}
- };
-
- /* Print a usage message and quit. */
-
- static void
- usage (int status)
- {
- if (status != 0)
- fprintf (stderr, _("Try `%s --help' for more information.\n"),
- program_name);
- else
- {
- printf (_("\
- Usage: %s [OPTION]... [FILE]...\n\
- "),
- program_name);
- printf (_("\
- Write each FILE to standard output, with line numbers added.\n\
- With no FILE, or when FILE is -, read standard input.\n\
- \n\
- -b, --body-numbering=STYLE use STYLE for numbering body lines\n\
- -d, --section-delimiter=CC use CC for separating logical pages\n\
- -f, --footer-numbering=STYLE use STYLE for numbering footer lines\n\
- -h, --header-numbering=STYLE use STYLE for numbering header lines\n\
- -i, --page-increment=NUMBER line number increment at each line\n\
- -l, --join-blank-lines=NUMBER group of NUMBER empty lines counted as one\n\
- -n, --number-format=FORMAT insert line numbers according to FORMAT\n\
- -p, --no-renumber do not reset line numbers at logical pages\n\
- -s, --number-separator=STRING add STRING after (possible) line number\n\
- -v, --first-page=NUMBER first line number on each logical page\n\
- -w, --number-width=NUMBER use NUMBER columns for line numbers\n\
- --help display this help and exit\n\
- --version output version information and exit\n\
- \n\
- By default, selects -v1 -i1 -l1 -sTAB -w6 -nrn -hn -bt -fn. CC are\n\
- two delimiter characters for separating logical pages, a missing\n\
- second character implies :. Type \\\\ for \\. STYLE is one of:\n\
- \n\
- a number all lines\n\
- t number only nonempty lines\n\
- n number no lines\n\
- pREGEXP number only lines that contain a match for REGEXP\n\
- \n\
- FORMAT is one of:\n\
- \n\
- ln left justified, no leading zeros\n\
- rn right justified, no leading zeros\n\
- rz right justified, leading zeros\n\
- \n\
- "));
- }
- exit (status == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
- }
-
- /* Build the printf format string, based on `lineno_format'. */
-
- static void
- build_print_fmt (void)
- {
- /* 12 = 10 chars for lineno_width, 1 for %, 1 for \0. */
- print_fmt = xmalloc (strlen (separator_str) + 12);
- switch (lineno_format)
- {
- case FORMAT_RIGHT_NOLZ:
- sprintf (print_fmt, "%%%dd%s", lineno_width, separator_str);
- break;
- case FORMAT_RIGHT_LZ:
- sprintf (print_fmt, "%%0%dd%s", lineno_width, separator_str);
- break;
- case FORMAT_LEFT:
- sprintf (print_fmt, "%%-%dd%s", lineno_width, separator_str);
- break;
- }
- }
-
- /* Set the command line flag TYPEP and possibly the regex pointer REGEXP,
- according to `optarg'. */
-
- static int
- build_type_arg (char **typep, struct re_pattern_buffer *regexp)
- {
- const char *errmsg;
- int rval = TRUE;
- int optlen;
-
- switch (*optarg)
- {
- case 'a':
- case 't':
- case 'n':
- *typep = optarg;
- break;
- case 'p':
- *typep = optarg++;
- optlen = strlen (optarg);
- regexp->allocated = optlen * 2;
- regexp->buffer = (unsigned char *) xmalloc (regexp->allocated);
- regexp->translate = NULL;
- regexp->fastmap = xmalloc (256);
- regexp->fastmap_accurate = 0;
- errmsg = re_compile_pattern (optarg, optlen, regexp);
- if (errmsg)
- error (EXIT_FAILURE, 0, "%s", errmsg);
- break;
- default:
- rval = FALSE;
- break;
- }
- return rval;
- }
-
- /* Print and increment the line number. */
-
- static void
- print_lineno (void)
- {
- printf (print_fmt, line_no);
- line_no += page_incr;
- }
-
- /* Switch to a header section. */
-
- static void
- proc_header (void)
- {
- current_type = header_type;
- current_regex = &header_regex;
- if (reset_numbers)
- line_no = starting_line_number;
- putchar ('\n');
- }
-
- /* Switch to a body section. */
-
- static void
- proc_body (void)
- {
- current_type = body_type;
- current_regex = &body_regex;
- putchar ('\n');
- }
-
- /* Switch to a footer section. */
-
- static void
- proc_footer (void)
- {
- current_type = footer_type;
- current_regex = &footer_regex;
- putchar ('\n');
- }
-
- /* Process a regular text line in `line_buf'. */
-
- static void
- proc_text (void)
- {
- static int blank_lines = 0; /* Consecutive blank lines so far. */
-
- switch (*current_type)
- {
- case 'a':
- if (blank_join > 1)
- {
- if (line_buf.length || ++blank_lines == blank_join)
- {
- print_lineno ();
- blank_lines = 0;
- }
- else
- printf (print_no_line_fmt);
- }
- else
- print_lineno ();
- break;
- case 't':
- if (line_buf.length)
- print_lineno ();
- else
- printf (print_no_line_fmt);
- break;
- case 'n':
- printf (print_no_line_fmt);
- break;
- case 'p':
- if (re_search (current_regex, line_buf.buffer, line_buf.length,
- 0, line_buf.length, (struct re_registers *) 0) < 0)
- printf (print_no_line_fmt);
- else
- print_lineno ();
- break;
- }
- fwrite (line_buf.buffer, sizeof (char), line_buf.length, stdout);
- putchar ('\n');
- }
-
- /* Return the type of line in `line_buf'. */
-
- static enum section
- check_section (void)
- {
- if (line_buf.length < 2 || memcmp (line_buf.buffer, section_del, 2))
- return Text;
- if (line_buf.length == header_del_len
- && !memcmp (line_buf.buffer, header_del, header_del_len))
- return Header;
- if (line_buf.length == body_del_len
- && !memcmp (line_buf.buffer, body_del, body_del_len))
- return Body;
- if (line_buf.length == footer_del_len
- && !memcmp (line_buf.buffer, footer_del, footer_del_len))
- return Footer;
- return Text;
- }
-
- /* Read and process the file pointed to by FP. */
-
- static void
- process_file (FILE *fp)
- {
- while (readline (&line_buf, fp))
- {
- switch ((int) check_section ())
- {
- case Header:
- proc_header ();
- break;
- case Body:
- proc_body ();
- break;
- case Footer:
- proc_footer ();
- break;
- case Text:
- proc_text ();
- break;
- }
- }
- }
-
- /* Process file FILE to standard output.
- Return 0 if successful, 1 if not. */
-
- static int
- nl_file (const char *file)
- {
- FILE *stream;
-
- if (!strcmp (file, "-"))
- {
- have_read_stdin = 1;
- stream = stdin;
- }
- else
- {
- stream = fopen (file, "r");
- if (stream == NULL)
- {
- error (0, errno, "%s", file);
- return 1;
- }
- }
-
- process_file (stream);
-
- if (ferror (stream))
- {
- error (0, errno, "%s", file);
- return 1;
- }
- if (!strcmp (file, "-"))
- clearerr (stream); /* Also clear EOF. */
- else if (fclose (stream) == EOF)
- {
- error (0, errno, "%s", file);
- return 1;
- }
- return 0;
- }
-
- int
- main (int argc, char **argv)
- {
- int c, exit_status = 0;
-
- program_name = argv[0];
- setlocale (LC_ALL, "");
- bindtextdomain (PACKAGE, LOCALEDIR);
- textdomain (PACKAGE);
-
- have_read_stdin = 0;
-
- while ((c = getopt_long (argc, argv, "h:b:f:v:i:pl:s:w:n:d:", longopts,
- (int *) 0)) != EOF)
- {
- switch (c)
- {
- case 0:
- break;
-
- case 'h':
- if (build_type_arg (&header_type, &header_regex) != TRUE)
- usage (2);
- break;
- case 'b':
- if (build_type_arg (&body_type, &body_regex) != TRUE)
- usage (2);
- break;
- case 'f':
- if (build_type_arg (&footer_type, &footer_regex) != TRUE)
- usage (2);
- break;
- case 'v':
- {
- long int tmp_long;
- if (xstrtol (optarg, NULL, 10, &tmp_long, NULL) != LONGINT_OK
- /* Allow it to be negative. */
- || tmp_long > INT_MAX)
- error (EXIT_FAILURE, 0, _("invalid starting line number: `%s'"),
- optarg);
- starting_line_number = (int) tmp_long;
- }
- break;
- case 'i':
- {
- long int tmp_long;
- if (xstrtol (optarg, NULL, 10, &tmp_long, NULL) != LONGINT_OK
- || tmp_long <= 0 || tmp_long > INT_MAX)
- error (EXIT_FAILURE, 0, _("invalid line number increment: `%s'"),
- optarg);
- page_incr = (int) tmp_long;
- }
- break;
- case 'p':
- reset_numbers = FALSE;
- break;
- case 'l':
- {
- long int tmp_long;
- if (xstrtol (optarg, NULL, 10, &tmp_long, NULL) != LONGINT_OK
- || tmp_long <= 0 || tmp_long > INT_MAX)
- error (EXIT_FAILURE, 0, _("invalid number of blank lines: `%s'"),
- optarg);
- blank_join = (int) tmp_long;
- }
- break;
- case 's':
- separator_str = optarg;
- break;
- case 'w':
- {
- long int tmp_long;
- if (xstrtol (optarg, NULL, 10, &tmp_long, NULL) != LONGINT_OK
- || tmp_long <= 0 || tmp_long > INT_MAX)
- error (EXIT_FAILURE, 0,
- _("invalid line number field width: `%s'"),
- optarg);
- lineno_width = (int) tmp_long;
- }
- break;
- case 'n':
- switch (*optarg)
- {
- case 'l':
- if (optarg[1] == 'n')
- lineno_format = FORMAT_LEFT;
- else
- usage (2);
- break;
- case 'r':
- switch (optarg[1])
- {
- case 'n':
- lineno_format = FORMAT_RIGHT_NOLZ;
- break;
- case 'z':
- lineno_format = FORMAT_RIGHT_LZ;
- break;
- default:
- usage (2);
- break;
- }
- break;
- default:
- usage (2);
- break;
- }
- break;
- case 'd':
- section_del = optarg;
- break;
- default:
- usage (2);
- break;
- }
- }
-
- if (show_version)
- {
- printf ("nl - %s\n", PACKAGE_VERSION);
- exit (EXIT_SUCCESS);
- }
-
- if (show_help)
- usage (0);
-
- /* Initialize the section delimiters. */
- c = strlen (section_del);
-
- header_del_len = c * 3;
- header_del = xmalloc (header_del_len + 1);
- strcat (strcat (strcpy (header_del, section_del), section_del), section_del);
-
- body_del_len = c * 2;
- body_del = xmalloc (body_del_len + 1);
- strcat (strcpy (body_del, section_del), section_del);
-
- footer_del_len = c;
- footer_del = xmalloc (footer_del_len + 1);
- strcpy (footer_del, section_del);
-
- /* Initialize the input buffer. */
- initbuffer (&line_buf);
-
- /* Initialize the printf format for unnumbered lines. */
- c = strlen (separator_str);
- print_no_line_fmt = xmalloc (lineno_width + c + 1);
- memset (print_no_line_fmt, ' ', lineno_width + c);
- print_no_line_fmt[lineno_width + c] = '\0';
-
- line_no = starting_line_number;
- current_type = body_type;
- current_regex = &body_regex;
- build_print_fmt ();
-
- /* Main processing. */
-
- if (optind == argc)
- exit_status |= nl_file ("-");
- else
- for (; optind < argc; optind++)
- exit_status |= nl_file (argv[optind]);
-
- if (have_read_stdin && fclose (stdin) == EOF)
- {
- error (0, errno, "-");
- exit_status = 1;
- }
- if (ferror (stdout) || fclose (stdout) == EOF)
- error (EXIT_FAILURE, errno, _("write error"));
-
- exit (exit_status == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
- }
-