usr/src/games/battlestar/getcom.c

#ifndef lint
static char sccsid[] = "@(#)getcom.c    1.1 %G%";
#endif

#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)
                        exit(1);
                while (isspace(*buf))
                        buf++;
                if (*buf)
                        break;
                if (error)
                        puts(error);
        }
        return (buf);
}

char *
getword(buf1, buf2, flag)
        char *buf1, *buf2;
{
        /* shifts to UPPERCASE if flag > 0, lowercase if    */
        /* flag < 0, and leaves it unchanged if flag = 0    */

        while (isspace(*buf1))
                buf1++;
        if (*buf1 != ',') {
                if (!*buf1) {
                        *buf2 = 0;
                        return (0);
                }
                while (*buf1 && !isspace(*buf1) && *buf1 != ',')
                        *buf2++ = shift(*buf1++, flag);
        } else
                *buf2++ = *buf1++;
        *buf2 = 0;
        while (isspace(*buf1))
                buf1++;
        return (*buf1 ? buf1 : 0);
}

shift(c, flg)
        char c;
        int flg;
{
        if (flg < 0)
                return isupper(c) ? tolower(c) : c;
        if (flg > 0)
                return islower(c) ? toupper(c) : c;
        return c;
}