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fields.c
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C/C++ Source or Header
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1995-12-17
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3KB
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95 lines
/*
* Copyright 1990, John F. Haugh II
* 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 John F. Haugh, II
* and other contributors.
* 4. Neither the name of John F. Haugh, II 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 JOHN HAUGH 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 JOHN HAUGH 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 <ctype.h>
#include <string.h>
#include <stdio.h>
#ifndef lint
static char rcsid[] = "$Id: fields.c,v 1.1 1995/12/16 01:15:45 marekm Exp $";
#endif
/*
* valid_field - insure that a field contains all legal characters
*
* The supplied field is scanned for non-printing and other illegal
* characters. If any illegal characters are found, valid_field
* returns -1. Zero is returned for success.
*/
int
valid_field (field, illegal)
char *field;
char *illegal;
{
char *cp;
for (cp = field;*cp && isprint (*cp) && ! strchr (illegal, *cp);cp++)
;
if (*cp)
return -1;
else
return 0;
}
/*
* change_field - change a single field if a new value is given.
*
* prompt the user with the name of the field being changed and the
* current value.
*/
/* "buf" _must_ be at least BUFSIZ chars to make strcpy() safe. --marekm */
void
change_field (buf, prompt)
char *buf;
char *prompt;
{
char new[BUFSIZ];
char *cp;
printf ("\t%s [%s]: ", prompt, buf);
if (fgets (new, BUFSIZ, stdin) != new)
return;
if ((cp = strchr (new, '\n')))
*cp = '\0';
else
return;
if (new[0])
strcpy (buf, new);
}