getans.c
1.52 KB
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2010, 2012, 2014-2016 Free Software Foundation, Inc.
GNU Mailutils is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Mailutils is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Mailutils. If not, see <http://www.gnu.org/licenses/>. */
#include "mu.h"
int
mu_vgetans (const char *variants, const char *fmt, va_list ap)
{
char repl[64];
while (1)
{
size_t n;
char *p;
mu_stream_vprintf (mu_strout, fmt, ap);
mu_stream_write (mu_strout, "? ", 2, NULL);
mu_stream_flush (mu_strout);
if (mu_stream_read (mu_strin, repl, sizeof repl, &n) || n == 0)
return 0;
mu_rtrim_class (repl, MU_CTYPE_ENDLN);
p = strchr (variants, *repl);
if (p)
return *p;
mu_stream_printf (mu_strout, _("Please answer one of [%s]: "), variants);
}
return 0; /* to pacify gcc */
}
int
mu_getans (const char *variants, const char *fmt, ...)
{
va_list ap;
int rc;
va_start (ap, fmt);
rc = mu_vgetans (variants, fmt, ap);
va_end (ap);
return rc;
}