99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
/*
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* Copyright 1990, Julianne Frances Haugh
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* 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 Julianne F. Haugh 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 JULIE HAUGH 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 JULIE HAUGH 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 <config.h>
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#ident "$Id: fields.c,v 1.7 2005/08/31 17:24:57 kloczek Exp $"
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#include <ctype.h>
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#include <string.h>
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#include <stdio.h>
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#include "prototypes.h"
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/*
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* valid_field - insure that a field contains all legal characters
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*
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* The supplied field is scanned for non-printing and other illegal
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* characters. If any illegal characters are found, valid_field
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* returns -1. Zero is returned for success.
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*/
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int valid_field (const char *field, const char *illegal)
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{
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const char *cp;
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for (cp = field;
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*cp && isprint (*cp & 0x7F) && !strchr (illegal, *cp); cp++);
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if (*cp)
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return -1;
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else
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return 0;
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}
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/*
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* change_field - change a single field if a new value is given.
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*
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* prompt the user with the name of the field being changed and the
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* current value.
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*/
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void change_field (char *buf, size_t maxsize, const char *prompt)
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{
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char newf[200];
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char *cp;
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if (maxsize > sizeof (newf))
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maxsize = sizeof (newf);
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printf ("\t%s [%s]: ", prompt, buf);
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if (fgets (newf, maxsize, stdin) != newf)
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return;
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if (!(cp = strchr (newf, '\n')))
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return;
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*cp = '\0';
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if (newf[0]) {
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/*
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* Remove leading and trailing whitespace. This also
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* makes it possible to change the field to empty, by
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* entering a space. --marekm
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*/
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while (--cp >= newf && isspace (*cp));
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*++cp = '\0';
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cp = newf;
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while (*cp && isspace (*cp))
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cp++;
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strncpy (buf, cp, maxsize - 1);
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buf[maxsize - 1] = '\0';
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}
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}
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