BSD 4_3_Tahoe release

[unix-history] / usr / src / games / battlestar / getcom.c

/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley.  The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/

#ifndef lint
static char sccsid[] = "@(#)getcom.c    5.2 (Berkeley) 6/19/88";
#endif /* not lint */

#include <stdio.h>
#include <ctype.h>

char *
getcom(buf, size, prompt, error)
       char *buf;
       int size;
       char *prompt, *error;
{
       for (;;) {
               fputs(prompt, stdout); 
               if (fgets(buf, size, stdin) == 0) {
                       clearerr(stdin);
                       continue;
               }
               while (isspace(*buf))
                       buf++;
               if (*buf)
                       break;
               if (error)
                       puts(error);
       }
       return (buf);
}


/*
* shifts to UPPERCASE if flag > 0, lowercase if flag < 0,
* and leaves it unchanged if flag = 0
*/
char *
getword(buf1, buf2, flag)
       register char *buf1, *buf2;
       register flag;
{
       while (isspace(*buf1))
               buf1++;
       if (*buf1 != ',') {
               if (!*buf1) {
                       *buf2 = 0;
                       return (0);
               }
               while (*buf1 && !isspace(*buf1) && *buf1 != ',')
                       if (flag < 0)
                               if (isupper(*buf1))
                                       *buf2++ = tolower(*buf1++);
                               else
                                       *buf2++ = *buf1++;
                       else if (flag > 0)
                               if (islower(*buf1))
                                       *buf2++ = toupper(*buf1++);
                               else
                                       *buf2++ = *buf1++;
                       else
                               *buf2++ = *buf1++;
       } else
               *buf2++ = *buf1++;
       *buf2 = 0;
       while (isspace(*buf1))
               buf1++;
       return (*buf1 ? buf1 : 0);
}