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/* read_switch.c -- prompt the user for an answer from the list
*
* 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 "read_switch.h"
#include "smatch.h"
int
read_switch (const char *prompt, const struct swit *ansp)
{
int i;
char *cp;
const struct swit *ap;
char ansbuf[BUFSIZ];
for (;;) {
fputs(prompt, stdout);
fflush (stdout);
cp = ansbuf;
while ((i = getchar ()) != '\n') {
if (i == EOF)
return 0;
if (cp < &ansbuf[sizeof ansbuf - 1]) {
i = tolower(i);
*cp++ = i;
}
}
*cp = '\0';
if (ansbuf[0] == '?' || cp == ansbuf) {
puts("Options are:");
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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