FreeBSD-5.3/usr.bin/nl/nl.c
/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Klaus Klein.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT(
"@(#) Copyright (c) 1999\
The NetBSD Foundation, Inc. All rights reserved.");
__RCSID("$FreeBSD: src/usr.bin/nl/nl.c,v 1.9 2004/07/13 02:18:21 tjr Exp $");
#endif
#include <sys/types.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <locale.h>
#include <regex.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wchar.h>
typedef enum {
number_all, /* number all lines */
number_nonempty, /* number non-empty lines */
number_none, /* no line numbering */
number_regex /* number lines matching regular expression */
} numbering_type;
struct numbering_property {
const char * const name; /* for diagnostics */
numbering_type type; /* numbering type */
regex_t expr; /* for type == number_regex */
};
/* line numbering formats */
#define FORMAT_LN "%-*d" /* left justified, leading zeros suppressed */
#define FORMAT_RN "%*d" /* right justified, leading zeros suppressed */
#define FORMAT_RZ "%0*d" /* right justified, leading zeros kept */
#define FOOTER 0
#define BODY 1
#define HEADER 2
#define NP_LAST HEADER
static struct numbering_property numbering_properties[NP_LAST + 1] = {
{ "footer", number_none },
{ "body", number_nonempty },
{ "header", number_none }
};
#define max(a, b) ((a) > (b) ? (a) : (b))
/*
* Maximum number of characters required for a decimal representation of a
* (signed) int; courtesy of tzcode.
*/
#define INT_STRLEN_MAXIMUM \
((sizeof (int) * CHAR_BIT - 1) * 302 / 1000 + 2)
static void filter(void);
static void parse_numbering(const char *, int);
static void usage(void);
/*
* Pointer to dynamically allocated input line buffer, and its size.
*/
static char *buffer;
static size_t buffersize;
/*
* Dynamically allocated buffer suitable for string representation of ints.
*/
static char *intbuffer;
/* delimiter characters that indicate the start of a logical page section */
static char delim[2 * MB_LEN_MAX];
static int delimlen;
/*
* Configurable parameters.
*/
/* line numbering format */
static const char *format = FORMAT_RN;
/* increment value used to number logical page lines */
static int incr = 1;
/* number of adjacent blank lines to be considered (and numbered) as one */
static unsigned int nblank = 1;
/* whether to restart numbering at logical page delimiters */
static int restart = 1;
/* characters used in separating the line number and the corrsp. text line */
static const char *sep = "\t";
/* initial value used to number logical page lines */
static int startnum = 1;
/* number of characters to be used for the line number */
/* should be unsigned but required signed by `*' precision conversion */
static int width = 6;
int
main(argc, argv)
int argc;
char *argv[];
{
int c, n;
long val;
unsigned long uval;
char *ep;
size_t intbuffersize, clen;
char delim1[MB_LEN_MAX] = { '\\' }, delim2[MB_LEN_MAX] = { ':' };
size_t delim1len = 1, delim2len = 1;
(void)setlocale(LC_ALL, "");
while ((c = getopt(argc, argv, "pb:d:f:h:i:l:n:s:v:w:")) != -1) {
switch (c) {
case 'p':
restart = 0;
break;
case 'b':
parse_numbering(optarg, BODY);
break;
case 'd':
clen = mbrlen(optarg, MB_CUR_MAX, NULL);
if (clen == (size_t)-1 || clen == (size_t)-2)
errc(EXIT_FAILURE, EILSEQ, NULL);
if (clen != 0) {
memcpy(delim1, optarg, delim1len = clen);
clen = mbrlen(optarg + delim1len,
MB_CUR_MAX, NULL);
if (clen == (size_t)-1 ||
clen == (size_t)-2)
errc(EXIT_FAILURE, EILSEQ, NULL);
if (clen != 0) {
memcpy(delim2, optarg + delim1len,
delim2len = clen);
if (optarg[delim1len + clen] != '\0')
errx(EXIT_FAILURE,
"invalid delim argument -- %s",
optarg);
}
}
break;
case 'f':
parse_numbering(optarg, FOOTER);
break;
case 'h':
parse_numbering(optarg, HEADER);
break;
case 'i':
errno = 0;
val = strtol(optarg, &ep, 10);
if ((ep != NULL && *ep != '\0') ||
((val == LONG_MIN || val == LONG_MAX) && errno != 0))
errx(EXIT_FAILURE,
"invalid incr argument -- %s", optarg);
incr = (int)val;
break;
case 'l':
errno = 0;
uval = strtoul(optarg, &ep, 10);
if ((ep != NULL && *ep != '\0') ||
(uval == ULONG_MAX && errno != 0))
errx(EXIT_FAILURE,
"invalid num argument -- %s", optarg);
nblank = (unsigned int)uval;
break;
case 'n':
if (strcmp(optarg, "ln") == 0) {
format = FORMAT_LN;
} else if (strcmp(optarg, "rn") == 0) {
format = FORMAT_RN;
} else if (strcmp(optarg, "rz") == 0) {
format = FORMAT_RZ;
} else
errx(EXIT_FAILURE,
"illegal format -- %s", optarg);
break;
case 's':
sep = optarg;
break;
case 'v':
errno = 0;
val = strtol(optarg, &ep, 10);
if ((ep != NULL && *ep != '\0') ||
((val == LONG_MIN || val == LONG_MAX) && errno != 0))
errx(EXIT_FAILURE,
"invalid startnum value -- %s", optarg);
startnum = (int)val;
break;
case 'w':
errno = 0;
val = strtol(optarg, &ep, 10);
if ((ep != NULL && *ep != '\0') ||
((val == LONG_MIN || val == LONG_MAX) && errno != 0))
errx(EXIT_FAILURE,
"invalid width value -- %s", optarg);
width = (int)val;
if (!(width > 0))
errx(EXIT_FAILURE,
"width argument must be > 0 -- %d",
width);
break;
case '?':
default:
usage();
/* NOTREACHED */
}
}
argc -= optind;
argv += optind;
switch (argc) {
case 0:
break;
case 1:
if (freopen(argv[0], "r", stdin) == NULL)
err(EXIT_FAILURE, "%s", argv[0]);
break;
default:
usage();
/* NOTREACHED */
}
/* Generate the delimiter sequence */
memcpy(delim, delim1, delim1len);
memcpy(delim + delim1len, delim2, delim2len);
delimlen = delim1len + delim2len;
/* Determine the maximum input line length to operate on. */
if ((val = sysconf(_SC_LINE_MAX)) == -1) /* ignore errno */
val = LINE_MAX;
/* Allocate sufficient buffer space (including the terminating NUL). */
buffersize = (size_t)val + 1;
if ((buffer = malloc(buffersize)) == NULL)
err(EXIT_FAILURE, "cannot allocate input line buffer");
/* Allocate a buffer suitable for preformatting line number. */
intbuffersize = max(INT_STRLEN_MAXIMUM, width) + 1; /* NUL */
if ((intbuffer = malloc(intbuffersize)) == NULL)
err(EXIT_FAILURE, "cannot allocate preformatting buffer");
/* Do the work. */
filter();
exit(EXIT_SUCCESS);
/* NOTREACHED */
}
static void
filter()
{
int line; /* logical line number */
int section; /* logical page section */
unsigned int adjblank; /* adjacent blank lines */
int consumed; /* intbuffer measurement */
int donumber, idx;
adjblank = 0;
line = startnum;
section = BODY;
#ifdef __GNUC__
(void)&donumber; /* avoid bogus `uninitialized' warning */
#endif
while (fgets(buffer, (int)buffersize, stdin) != NULL) {
for (idx = FOOTER; idx <= NP_LAST; idx++) {
/* Does it look like a delimiter? */
if (memcmp(buffer + delimlen * idx, delim,
delimlen) == 0) {
/* Was this the whole line? */
if (buffer[delimlen * (idx + 1)] == '\n') {
section = idx;
adjblank = 0;
if (restart)
line = startnum;
goto nextline;
}
} else {
break;
}
}
switch (numbering_properties[section].type) {
case number_all:
/*
* Doing this for number_all only is disputable, but
* the standard expresses an explicit dependency on
* `-b a' etc.
*/
if (buffer[0] == '\n' && ++adjblank < nblank)
donumber = 0;
else
donumber = 1, adjblank = 0;
break;
case number_nonempty:
donumber = (buffer[0] != '\n');
break;
case number_none:
donumber = 0;
break;
case number_regex:
donumber =
(regexec(&numbering_properties[section].expr,
buffer, 0, NULL, 0) == 0);
break;
}
if (donumber) {
/* Note: sprintf() is safe here. */
consumed = sprintf(intbuffer, format, width, line);
(void)printf("%s",
intbuffer + max(0, consumed - width));
line += incr;
} else {
(void)printf("%*s", width, "");
}
(void)printf("%s%s", sep, buffer);
if (ferror(stdout))
err(EXIT_FAILURE, "output error");
nextline:
;
}
if (ferror(stdin))
err(EXIT_FAILURE, "input error");
}
/*
* Various support functions.
*/
static void
parse_numbering(argstr, section)
const char *argstr;
int section;
{
int error;
char errorbuf[NL_TEXTMAX];
switch (argstr[0]) {
case 'a':
numbering_properties[section].type = number_all;
break;
case 'n':
numbering_properties[section].type = number_none;
break;
case 't':
numbering_properties[section].type = number_nonempty;
break;
case 'p':
/* If there was a previous expression, throw it away. */
if (numbering_properties[section].type == number_regex)
regfree(&numbering_properties[section].expr);
else
numbering_properties[section].type = number_regex;
/* Compile/validate the supplied regular expression. */
if ((error = regcomp(&numbering_properties[section].expr,
&argstr[1], REG_NEWLINE|REG_NOSUB)) != 0) {
(void)regerror(error,
&numbering_properties[section].expr,
errorbuf, sizeof (errorbuf));
errx(EXIT_FAILURE,
"%s expr: %s -- %s",
numbering_properties[section].name, errorbuf,
&argstr[1]);
}
break;
default:
errx(EXIT_FAILURE,
"illegal %s line numbering type -- %s",
numbering_properties[section].name, argstr);
}
}
static void
usage()
{
(void)fprintf(stderr,
"usage: nl [-p] [-b type] [-d delim] [-f type] [-h type] [-i incr] [-l num]\n"
" [-n format] [-s sep] [-v startnum] [-w width] [file]\n");
exit(EXIT_FAILURE);
}