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getcom.c revision 1.1 
      1 /*
      2  * Copyright (c) 1983 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 
     34 #ifndef lint
     35 static char sccsid[] = "@(#)getcom.c	5.3 (Berkeley) 6/1/90";
     36 #endif /* not lint */
     37 
     38 #include <stdio.h>
     39 #include <ctype.h>
     40 
     41 char *
     42 getcom(buf, size, prompt, error)
     43 	char *buf;
     44 	int size;
     45 	char *prompt, *error;
     46 {
     47 	for (;;) {
     48 		fputs(prompt, stdout);
     49 		if (fgets(buf, size, stdin) == 0) {
     50 			clearerr(stdin);
     51 			continue;
     52 		}
     53 		while (isspace(*buf))
     54 			buf++;
     55 		if (*buf)
     56 			break;
     57 		if (error)
     58 			puts(error);
     59 	}
     60 	return (buf);
     61 }
     62 
     63 
     64 /*
     65  * shifts to UPPERCASE if flag > 0, lowercase if flag < 0,
     66  * and leaves it unchanged if flag = 0
     67  */
     68 char *
     69 getword(buf1, buf2, flag)
     70 	register char *buf1, *buf2;
     71 	register flag;
     72 {
     73 	while (isspace(*buf1))
     74 		buf1++;
     75 	if (*buf1 != ',') {
     76 		if (!*buf1) {
     77 			*buf2 = 0;
     78 			return (0);
     79 		}
     80 		while (*buf1 && !isspace(*buf1) && *buf1 != ',')
     81 			if (flag < 0)
     82 				if (isupper(*buf1))
     83 					*buf2++ = tolower(*buf1++);
     84 				else
     85 					*buf2++ = *buf1++;
     86 			else if (flag > 0)
     87 				if (islower(*buf1))
     88 					*buf2++ = toupper(*buf1++);
     89 				else
     90 					*buf2++ = *buf1++;
     91 			else
     92 				*buf2++ = *buf1++;
     93 	} else
     94 		*buf2++ = *buf1++;
     95 	*buf2 = 0;
     96 	while (isspace(*buf1))
     97 		buf1++;
     98 	return (*buf1 ? buf1 : 0);
     99 }
    100