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textutils_1_3.LHA
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nl.c
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1992-06-29
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/* nl -- number lines of files
Copyright (C) 1989, 1992 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Written by Scott Bartram (nancy!scott@uunet.uu.net)
Revised by David MacKenzie (djm@ai.mit.edu) */
#include <stdio.h>
#include <sys/types.h>
#include <getopt.h>
#include <regex.h>
#include "linebuffer.h"
#include "system.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
};
/* Format of body lines (-b). */
char *body_type = "t";
/* Format of header lines (-h). */
char *header_type = "n";
/* Format of footer lines (-f). */
char *footer_type = "n";
/* Format currently being used (body, header, or footer). */
char *current_type;
/* Regex for body lines to number (-bp). */
struct re_pattern_buffer body_regex;
/* Regex for header lines to number (-hp). */
struct re_pattern_buffer header_regex;
/* Regex for footer lines to number (-fp). */
struct re_pattern_buffer footer_regex;
/* Pointer to current regex, if any. */
struct re_pattern_buffer *current_regex = NULL;
/* Separator string to print after line number (-s). */
char *separator_str = "\t";
/* Input section delimiter string (-d). */
char *section_del = DEFAULT_SECTION_DELIMITERS;
/* Header delimiter string. */
char *header_del = NULL;
/* Header section delimiter length. */
int header_del_len;
/* Body delimiter string. */
char *body_del = NULL;
/* Body section delimiter length. */
int body_del_len;
/* Footer delimiter string. */
char *footer_del = NULL;
/* Footer section delimiter length. */
int footer_del_len;
/* Input buffer. */
struct linebuffer line_buf;
/* printf format string for line number. */
char *print_fmt;
/* printf format string for unnumbered lines. */
char *print_no_line_fmt = NULL;
/* Starting line number on each page (-v). */
int page_start = 1;
/* Line number increment (-i). */
int page_incr = 1;
/* If TRUE, reset line number at start of each page (-p). */
int reset_numbers = TRUE;
/* Number of blank lines to consider to be one line for numbering (-l). */
int blank_join = 1;
/* Width of line numbers (-w). */
int lineno_width = 6;
/* Line number format (-n). */
enum number_format lineno_format = FORMAT_RIGHT_NOLZ;
/* Current print line number. */
int line_no;
/* The name this program was run with. */
char *program_name;
/* Nonzero if we have ever read standard input. */
int have_read_stdin;
enum section check_section ();
char *xmalloc ();
char *xrealloc ();
int build_type_arg ();
int nl_file ();
void usage ();
void process_file ();
void proc_header ();
void proc_body ();
void proc_footer ();
void proc_text ();
void print_lineno ();
void build_print_fmt ();
void error ();
struct option longopts[] =
{
{"header-numbering", 1, NULL, 'h'},
{"body-numbering", 1, NULL, 'b'},
{"footer-numbering", 1, NULL, 'f'},
{"first-page", 1, NULL, 'v'},
{"page-increment", 1, NULL, 'i'},
{"no-renumber", 0, NULL, 'p'},
{"join-blank-lines", 1, NULL, 'l'},
{"number-separator", 1, NULL, 's'},
{"number-width", 1, NULL, 'w'},
{"number-format", 1, NULL, 'n'},
{"section-delimiter", 1, NULL, 'd'},
{NULL, 0, NULL, 0}
};
void
main (argc, argv)
int argc;
char **argv;
{
int c, exit_status = 0;
program_name = argv[0];
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 'h':
if (build_type_arg (&header_type, &header_regex) != TRUE)
usage ();
break;
case 'b':
if (build_type_arg (&body_type, &body_regex) != TRUE)
usage ();
break;
case 'f':
if (build_type_arg (&footer_type, &footer_regex) != TRUE)
usage ();
break;
case 'v':
page_start = atoi (optarg);
break;
case 'i':
page_incr = atoi (optarg);
if (page_incr < 1)
page_incr = 1;
break;
case 'p':
reset_numbers = FALSE;
break;
case 'l':
blank_join = atoi (optarg);
break;
case 's':
separator_str = optarg;
break;
case 'w':
lineno_width = atoi (optarg);
if (lineno_width < 1)
lineno_width = 1;
break;
case 'n':
switch (*optarg)
{
case 'l':
if (optarg[1] == 'n')
lineno_format = FORMAT_LEFT;
else
usage ();
break;
case 'r':
switch (optarg[1])
{
case 'n':
lineno_format = FORMAT_RIGHT_NOLZ;
break;
case 'z':
lineno_format = FORMAT_RIGHT_LZ;
break;
default:
usage ();
break;
}
break;
default:
usage ();
break;
}
break;
case 'd':
section_del = optarg;
break;
default:
usage ();
break;
}
}
/* 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 = page_start;
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 (1, 0, "write error");
exit (exit_status);
}
/* Process file FILE to standard output.
Return 0 if successful, 1 if not. */
int
nl_file (file)
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;
}
/* Read and process the file pointed to by FP. */
void
process_file (fp)
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;
}
}
}
/* Return the type of line in `line_buf'. */
enum section
check_section ()
{
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;
}
/* Switch to a header section. */
void
proc_header ()
{
current_type = header_type;
current_regex = &header_regex;
if (reset_numbers)
line_no = page_start;
putchar ('\n');
}
/* Switch to a body section. */
void
proc_body ()
{
current_type = body_type;
current_regex = &body_regex;
putchar ('\n');
}
/* Switch to a footer section. */
void
proc_footer ()
{
current_type = footer_type;
current_regex = &footer_regex;
putchar ('\n');
}
/* Process a regular text line in `line_buf'. */
void
proc_text ()
{
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');
}
/* Print and increment the line number. */
void
print_lineno ()
{
printf (print_fmt, line_no);
line_no += page_incr;
}
/* Build the printf format string, based on `lineno_format'. */
void
build_print_fmt ()
{
/* 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'. */
int
build_type_arg (typep, regexp)
char **typep;
struct re_pattern_buffer *regexp;
{
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 (1, 0, "%s", errmsg);
break;
default:
rval = FALSE;
break;
}
return rval;
}
/* Print a usage message and quit. */
void
usage ()
{
fprintf (stderr, "\
Usage: %s [-h header-style] [-b body-style] [-f footer-style] [-p] [-d cc]\n\
[-v start-number] [-i increment] [-l lines] [-s line-separator]\n\
[-w line-no-width] [-n {ln,rn,rz}] [--header-numbering=style]\n\
[--body-numbering=style] [--footer-numbering=style]\n\
[--first-page=number] [--page-increment=number] [--no-renumber]\n\
[--join-blank-lines=number] [--number-separator=string]\n\
[--number-width=number] [--number-format={ln,rn,rz}]\n\
[--section-delimiter=cc] [file...]\n",
program_name);
exit (2);
}