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/*
** gans.c -- get an answer from the user
**
** This code is Copyright (c) 2002, by the authors of nmh. See the
** COPYRIGHT file in the root directory of the nmh distribution for
** complete copyright information.
*/
#include <h/mh.h>
#include <ctype.h>
int
gans(char *prompt, struct swit *ansp)
{
int i;
char *cp;
struct swit *ap;
char ansbuf[BUFSIZ];
for (;;) {
printf("%s", prompt);
fflush(stdout);
cp = ansbuf;
while ((i = getchar()) != '\n') {
if (i == EOF)
return 0;
if (cp < &ansbuf[sizeof ansbuf - 1]) {
*cp++ = tolower(i);
}
}
*cp = '\0';
if (ansbuf[0] == '?' || cp == ansbuf) {
printf("Options are:\n");
for (ap = ansp; ap->sw; ap++)
printf(" %s\n", ap->sw);
continue;
}
if ((i = smatch(ansbuf, ansp)) < 0) {
printf("%s: %s.\n", ansbuf, i == -1 ? "unknown" : "ambiguous");
continue;
}
return i;
}
}
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