Importing usr.bin/expand
Change-Id: I4089d86d4ae1dcade0c82ed30ecd5685802acfd3
This commit is contained in:
Lionel Sambuc
parent
0b8a9e801d
commit
563dd2c8f4
10 changed files with 284 additions and 142 deletions
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@ -8,7 +8,7 @@ SUBDIR= add_route arp ash at backup btrace \
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comm compress cp crc cron crontab cut \
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dd decomp16 DESCRIBE devmand devsize df dhcpd \
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dhrystone diff diskctl dumpcore \
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eject env expand factor fbdctl \
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eject env factor fbdctl \
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find fix fold format fortune fsck.mfs \
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gcore gcov-pull getty grep hexdump host \
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hostaddr id ifconfig ifdef \
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@ -1,4 +0,0 @@
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PROG= expand
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MAN=
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.include <bsd.prog.mk>
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@ -1,99 +0,0 @@
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/* expand - expand tabs to spaces Author: Terrence W. Holm */
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/* Usage: expand [ -tab1,tab2,tab3,... ] [ file ... ] */
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#include <stddef.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#define MAX_TABS 32
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int column = 0; /* Current column, retained between files */
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int main(int argc, char **argv);
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void Expand(FILE *f, int tab_index, int tabs []);
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int main(argc, argv)
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int argc;
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char *argv[];
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{
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int tabs[MAX_TABS];
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int tab_index = 0; /* Default one tab */
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int i;
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FILE *f;
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tabs[0] = 8; /* Default tab stop */
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if (argc > 1 && argv[1][0] == '-') {
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char *p = argv[1];
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int last_tab_stop = 0;
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for (tab_index = 0; tab_index < MAX_TABS; ++tab_index) {
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if ((tabs[tab_index] = atoi(p + 1)) <= last_tab_stop) {
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fprintf(stderr, "Bad tab stop spec\n");
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exit(1);
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}
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last_tab_stop = tabs[tab_index];
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if ((p = strchr(p + 1, ',')) == NULL) break;
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}
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--argc;
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++argv;
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}
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if (argc == 1)
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Expand(stdin, tab_index, tabs);
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else
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for (i = 1; i < argc; ++i) {
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if ((f = fopen(argv[i], "r")) == NULL) {
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perror(argv[i]);
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exit(1);
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}
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Expand(f, tab_index, tabs);
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fclose(f);
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}
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return(0);
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}
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void Expand(f, tab_index, tabs)
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FILE *f;
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int tab_index;
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int tabs[];
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{
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int next;
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int c;
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int i;
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while ((c = getc(f)) != EOF) {
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if (c == '\t') {
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if (tab_index == 0)
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next = (column / tabs[0] + 1) * tabs[0];
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else {
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for (i = 0; i <= tab_index && tabs[i] <= column; ++i);
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if (i > tab_index)
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next = column + 1;
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else
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next = tabs[i];
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}
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do {
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++column;
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putchar(' ');
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} while (column < next);
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continue;
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}
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if (c == '\b')
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column = column > 0 ? column - 1 : 0;
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else if (c == '\n' || c == '\r')
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column = 0;
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else
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++column;
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putchar(c);
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}
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}
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@ -4,7 +4,7 @@ MAN= ash.1 at.1 \
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cp.1 crc.1 crontab.1 dd.1 \
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df.1 dhrystone.1 dosdir.1 dosread.1 doswrite.1 \
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dumpcore.1 eject.1 \
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env.1 expand.1 factor.1 \
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env.1 factor.1 \
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flexdoc.1 fold.1 format.1 fortune.1 \
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fsck.mfs.1 host.1 hostaddr.1 ifdef.1 \
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isodir.1 isoinfo.1 isoread.1 \
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@ -1,32 +0,0 @@
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.TH EXPAND 1
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.SH NAME
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expand \- convert tabs to spaces
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.SH SYNOPSIS
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\fBexpand\fR [\fB\-\fIt1,t2, ...\fR]\fR [\fIfile\fR]\fR
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.br
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.de FL
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.TP
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\\fB\\$1\\fR
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\\$2
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..
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.de EX
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.TP 20
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\\fB\\$1\\fR
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# \\$2
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..
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.SH OPTIONS
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.TP 5
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.B \-\fIt\fR
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# Tab stop positions
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.SH EXAMPLES
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.TP 20
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.B expand \-16,32,48,64
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# Expand \fIstdin\fR with tabs every 16 columns
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.SH DESCRIPTION
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.PP
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\fIExpand\fR replaces tabs in the named files with the equivalent numbers
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of spaces. If no files are listed, \fIstdin\fR is given. If only one
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tab is given, the rest are multiples of it. The default is a tab every 8
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spaces.
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.SH "SEE ALSO"
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.BR unexpand (1).
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@ -154,6 +154,7 @@
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2012/10/17 12:00:00,usr.bin/ctags
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2012/10/17 12:00:00,usr.bin/dirname
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2011/09/01 13:37:33,usr.bin/du
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2012/10/17 12:00:00,usr.bin/expand
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2013/05/31 12:00:00,usr.bin/finger
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2013/03/22 12:00:00,usr.bin/from
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2013/04/05 12:00:00,usr.bin/ftp
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@ -9,10 +9,10 @@ SUBDIR= \
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cal chpass cksum \
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col ctags \
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dirname du \
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finger \
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from ftp \
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genassym getopt head \
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indent infocmp join \
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expand \
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finger from \
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ftp genassym getopt \
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head indent infocmp join \
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ldd \
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login logname lorder m4 \
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make man \
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@ -30,7 +30,6 @@ SUBDIR= \
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toproto \
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uniq \
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\
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\
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wc whatis who \
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xinstall yes
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7
usr.bin/expand/Makefile
Normal file
7
usr.bin/expand/Makefile
Normal file
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@ -0,0 +1,7 @@
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# @(#)Makefile 8.1 (Berkeley) 6/9/93
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# $NetBSD: Makefile,v 1.5 2009/04/14 22:15:19 lukem Exp $
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PROG= expand
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MLINKS= expand.1 unexpand.1
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.include <bsd.prog.mk>
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87
usr.bin/expand/expand.1
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87
usr.bin/expand/expand.1
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@ -0,0 +1,87 @@
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.\" $NetBSD: expand.1,v 1.12 2012/05/12 14:52:57 reed Exp $
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.\"
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.\" Copyright (c) 1980, 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)expand.1 8.1 (Berkeley) 6/9/93
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.\"
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.Dd December 20, 2008
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.Dt EXPAND 1
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.Os
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.Sh NAME
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.Nm expand ,
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.Nm unexpand
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.Nd expand tabs to spaces, and vice versa
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.Sh SYNOPSIS
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.Nm
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.Op Fl t Ar tabstop
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.Op Fl t Ar tab1,tab2,...,tabn
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.Op Ar
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.Nm unexpand
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.Op Fl a
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.Op Fl t Ar tab1,tab2,...,tabn
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.Op Ar
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.Sh DESCRIPTION
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.Nm
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processes the named files or the standard input writing
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the standard output with tabs changed into blanks.
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Backspace characters are preserved into the output and decrement
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the column count for tab calculations.
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.Nm
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is useful for pre-processing character files
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(before sorting, looking at specific columns, etc.) that
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contain tabs.
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.Pp
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If a single
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.Ar tabstop
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argument is given, then tabs are set
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.Ar tabstop
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spaces apart instead of the default 8.
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If multiple tabstops are given then the tabs are set at those
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specific columns.
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.Pp
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.Nm unexpand
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puts tabs back into the data from the standard input or the named
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files and writes the result on the standard output.
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.Pp
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Option (with
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.Nm unexpand
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only):
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.Bl -tag -width flag
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.It Fl a
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By default, only leading blanks and tabs
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are reconverted to maximal strings of tabs.
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If the
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.Fl a
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option is given, then tabs are inserted whenever they would compress the
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resultant file by replacing two or more characters.
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.El
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.Sh HISTORY
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The
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.Nm
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command appeared in
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.Bx 1 .
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183
usr.bin/expand/expand.c
Normal file
183
usr.bin/expand/expand.c
Normal file
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@ -0,0 +1,183 @@
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/* $NetBSD: expand.c,v 1.13 2009/04/12 02:51:36 lukem Exp $ */
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/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1980, 1993\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)expand.c 8.1 (Berkeley) 6/9/93";
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#endif
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__RCSID("$NetBSD: expand.c,v 1.13 2009/04/12 02:51:36 lukem Exp $");
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#endif /* not lint */
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <unistd.h>
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#include <err.h>
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/*
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* expand - expand tabs to equivalent spaces
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*/
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size_t nstops;
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size_t tabstops[100];
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static void getstops(const char *);
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int main(int, char **);
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static void usage(void) __dead;
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int
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main(int argc, char *argv[])
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{
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int c;
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size_t n, column;
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setprogname(argv[0]);
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/* handle obsolete syntax */
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while (argc > 1 &&
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argv[1][0] == '-' && isdigit((unsigned char)argv[1][1])) {
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getstops(&argv[1][1]);
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argc--; argv++;
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}
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while ((c = getopt (argc, argv, "t:")) != -1) {
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switch (c) {
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case 't':
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getstops(optarg);
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break;
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case '?':
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default:
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usage();
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/* NOTREACHED */
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}
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}
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argc -= optind;
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argv += optind;
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do {
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if (argc > 0) {
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if (freopen(argv[0], "r", stdin) == NULL)
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err(EXIT_FAILURE, "Cannot open `%s'", argv[0]);
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argc--, argv++;
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}
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column = 0;
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while ((c = getchar()) != EOF) {
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switch (c) {
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case '\t':
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if (nstops == 0) {
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do {
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putchar(' ');
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column++;
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} while (column & 07);
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continue;
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}
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if (nstops == 1) {
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do {
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putchar(' ');
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column++;
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} while (((column - 1) % tabstops[0])
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!= (tabstops[0] - 1));
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continue;
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}
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for (n = 0; n < nstops; n++)
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if (tabstops[n] > column)
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break;
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if (n == nstops) {
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putchar(' ');
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column++;
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continue;
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}
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while (column < tabstops[n]) {
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putchar(' ');
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column++;
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}
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continue;
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case '\b':
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if (column)
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column--;
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putchar('\b');
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continue;
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default:
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putchar(c);
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column++;
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continue;
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case '\n':
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putchar(c);
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column = 0;
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continue;
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}
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}
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} while (argc > 0);
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return EXIT_SUCCESS;
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}
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static void
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getstops(const char *spec)
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{
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int i;
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const char *cp = spec;
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nstops = 0;
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for (;;) {
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i = 0;
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while (*cp >= '0' && *cp <= '9')
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i = i * 10 + *cp++ - '0';
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if (i <= 0 || i > 256)
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errx(EXIT_FAILURE, "Too large tab stop spec `%d'", i);
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if (nstops > 0 && (size_t)i <= tabstops[nstops-1])
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errx(EXIT_FAILURE, "Out of order tabstop spec `%d'", i);
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if (nstops == sizeof(tabstops) / sizeof(tabstops[0]) - 1)
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errx(EXIT_FAILURE, "Too many tabstops");
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tabstops[nstops++] = i;
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if (*cp == '\0')
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break;
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if (*cp != ',' && *cp != ' ')
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errx(EXIT_FAILURE, "Illegal tab stop spec `%s'", spec);
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cp++;
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}
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr, "Usage: %s [-t tablist] [file ...]\n",
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getprogname());
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exit(EXIT_FAILURE);
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}
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