percent.c

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


static int prev = -1;
static int first = 1;

static int (*ext_percent) (int);

int G_percent(long n, long d, int s)
{
    return (G_percent2(n, d, s, stderr));
}


int G_percent2(long n, long d, int s, FILE *out)
{
    int x, format;

    format = G_info_format();

    x = (d <= 0 || s <= 0)
        ? 100 : (int)(100 * n / d);

    /* be verbose only 1> */
    if (format == G_INFO_FORMAT_SILENT || G_verbose() < 1)
        return 0;

    if (n <= 0 || n >= d || x > prev + s) {
        prev = x;

        if (ext_percent) {
            ext_percent(x);
        }
        else {
            if (format == G_INFO_FORMAT_STANDARD) {
                if (out != NULL) {
                    fprintf(out, "%4d%%\b\b\b\b\b", x);
                }
            }
            else {
                if (format == G_INFO_FORMAT_PLAIN) {
                    if (out != NULL) {
                        if (x == 100)
                            fprintf(out, "%d\n", x);
                        else
                            fprintf(out, "%d..", x);
                    }
                }
                else {          /* GUI */
                    if (out != NULL) {
                        if (first) {
                            fprintf(out, "\n");
                        }
                        fprintf(out, "GRASS_INFO_PERCENT: %d\n", x);
                        fflush(out);
                    }
                    first = 0;
                }
            }
        }
    }
    if (x >= 100) {
        if (ext_percent) {
            ext_percent(100);
        }
        else if (format == G_INFO_FORMAT_STANDARD) {
            if (out != NULL) {
                fprintf(out, "\n");
            }
        }
        prev = -1;
        first = 1;
    }

    return 0;
}

int G_percent_reset(void)
{
    prev = -1;
    first = 1;

    return 0;
}

void G_set_percent_routine(int (*percent_routine) (int))
{
    ext_percent = percent_routine;
}

void G_unset_percent_routine(void)
{
    ext_percent = NULL;
}