yes.c

Go to the documentation of this file.

#include <stdio.h>
#include <grass/gis.h>


int G_yes(const char *question, int dflt)
{
    fflush(stdout);

    while (1) {
        char answer[100];

        fprintf(stderr, "%s", question);

        while (1) {
            fprintf(stderr, "(y/n) ");
            if (dflt >= 0)
                fprintf(stderr, dflt == 0 ? "[n] " : "[y] ");

            fflush(stderr);
            if (!G_gets(answer))
                break;
            G_strip(answer);

            switch (*answer) {
            case 'y':
            case 'Y':
                return (1);
            case 'n':
            case 'N':
                return (0);
            case 0:
                if (dflt >= 0)
                    return (dflt);
            }
        }
    }
}