[thirdparty/util-linux.git] / text-utils / colrm.c

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.
 *
 * 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 University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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 <stdio.h>

/*
COLRM removes unwanted columns from a file
	Jeff Schriebman  UC Berkeley 11-74
*/

int getn(char *ap);

int
main(int argc, char **argv)
{
	register int c, ct, first, last;

	first = 0;
	last = 0;
	if (argc > 1)
		first = getn(*++argv);
	if (argc > 2)
		last = getn(*++argv);

start:
	ct = 0;
loop1:
	c = getc(stdin);
	if (feof(stdin))
		goto fin;
	if (c == '\t')
		ct = (ct + 8) & ~7;
	else if (c == '\b')
		ct = ct ? ct - 1 : 0;
	else
		ct++;
	if (c == '\n') {
		putc(c, stdout);
		goto start;
	}
	if (!first || ct < first) {
		putc(c, stdout);
		goto loop1;
	}

/* Loop getting rid of characters */
	while (!last || ct < last) {
		c = getc(stdin);
		if (feof(stdin))
			goto fin;
		if (c == '\n') {
			putc(c, stdout);
			goto start;
		}
		if (c == '\t')
			ct = (ct + 8) & ~7;
		else if (c == '\b')
			ct = ct ? ct - 1 : 0;
		else
			ct++;
	}

/* Output last of the line */
	for (;;) {
		c = getc(stdin);
		if (feof(stdin))
			break;
		putc(c, stdout);
		if (c == '\n')
			goto start;
	}
fin:
	fflush(stdout);
	return 0;
}

int getn(char *ap)
{
	register int n,c;
	register char *p;

	p = ap;
	n = 0;
	while ((c = *p++) >= '0' && c <= '9')
		n = n*10 + c - '0';
	return(n);
}
Commit	Line	Data
6dbe3af9 KZ	1	/*
	2	* Copyright (c) 1980 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*/
	33
6dbe3af9	34	#include <stdio.h>
2b6fc908	35
6dbe3af9 KZ	36	/*
	37	COLRM removes unwanted columns from a file
	38	Jeff Schriebman UC Berkeley 11-74
	39	*/
	40
fd6b7a7f	41	int getn(char *ap);
6dbe3af9	42
5c36a0eb KZ	43	int
5c36a0eb KZ	44	main(int argc, char **argv)
6dbe3af9	45	{
5c36a0eb	46	register int c, ct, first, last;
6dbe3af9 KZ	47
	48	first = 0;
	49	last = 0;
	50	if (argc > 1)
	51	first = getn(*++argv);
	52	if (argc > 2)
	53	last = getn(*++argv);
	54
	55	start:
	56	ct = 0;
	57	loop1:
	58	c = getc(stdin);
	59	if (feof(stdin))
	60	goto fin;
	61	if (c == '\t')
	62	ct = (ct + 8) & ~7;
	63	else if (c == '\b')
	64	ct = ct ? ct - 1 : 0;
	65	else
	66	ct++;
	67	if (c == '\n') {
	68	putc(c, stdout);
	69	goto start;
	70	}
	71	if (!first \|\| ct < first) {
	72	putc(c, stdout);
	73	goto loop1;
	74	}
	75
	76	/* Loop getting rid of characters */
	77	while (!last \|\| ct < last) {
	78	c = getc(stdin);
	79	if (feof(stdin))
	80	goto fin;
	81	if (c == '\n') {
	82	putc(c, stdout);
	83	goto start;
	84	}
	85	if (c == '\t')
	86	ct = (ct + 8) & ~7;
	87	else if (c == '\b')
	88	ct = ct ? ct - 1 : 0;
	89	else
	90	ct++;
	91	}
	92
	93	/* Output last of the line */
	94	for (;;) {
	95	c = getc(stdin);
	96	if (feof(stdin))
	97	break;
	98	putc(c, stdout);
	99	if (c == '\n')
	100	goto start;
	101	}
	102	fin:
	103	fflush(stdout);
fd6b7a7f	104	return 0;
6dbe3af9 KZ	105	}
6dbe3af9 KZ	106
fd6b7a7f	107	int getn(char *ap)
6dbe3af9 KZ	108	{
	109	register int n,c;
	110	register char *p;
	111
	112	p = ap;
	113	n = 0;
	114	while ((c = *p++) >= '0' && c <= '9')
	115	n = n*10 + c - '0';
	116	return(n);
	117	}