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/****************************************************************************
*
* MODULE: segment
* AUTHOR(S): CERL (original contributors)
* Markus Neteler <neteler itc.it>,
* Bernhard Reiter <bernhard intevation.de>,
* Brad Douglas <rez touchofmadness.com>,
* Glynn Clements <glynn gclements.plus.com>
* PURPOSE: Segment test routines
* COPYRIGHT: (C) 1999-2006 by the GRASS Development Team
*
* This program is free software under the GNU General Public
* License (>=v2). Read the file COPYING that comes with GRASS
* for details.
*
*****************************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <grass/segment.h>
#define NCOLS 100
#define NROWS 100
#define SROWS 8
#define SCOLS 8
#define LEN 2
#define NSEGS 4
/**
* \fn int main (int argc, char **argv)
*
* \brief Segment library test program.
*
* \return 0 on success
* \return calls <i>exit()</i> on error
*/
int main(int argc, char **argv)
{
SEGMENT seg;
char data[NROWS * NCOLS * LEN];
int row, col;
int i;
int fd;
char junk[3];
fprintf(stdout, "creating seg.file\n");
fd = creat("seg.file", 0666);
if (fd < 0) {
perror("seg.file");
exit(EXIT_FAILURE);
}
segment_format(fd, NROWS, NCOLS, SROWS, SCOLS, LEN);
close(fd);
fprintf(stdout, "opening seg.file\n");
fd = open("seg.file", 2);
if (fd < 0) {
perror("seg.file");
exit(EXIT_FAILURE);
}
segment_init(&seg, fd, NSEGS);
fprintf(stdout, "rows %d, cols %d (len %d)\n", seg.nrows, seg.ncols,
seg.len);
if (seg.nrows != NROWS || seg.ncols != NCOLS || seg.len != LEN) {
fprintf(stdout, "OOPS - wrong segment file\n");
exit(EXIT_FAILURE);
}
fprintf(stdout, "writing seg.file\n");
for (row = 0; row < NROWS; row++) {
for (col = 0; col < NCOLS; col++) {
data[col * 2] = row;
data[col * 2 + 1] = col;
}
segment_put_row(&seg, data, row);
}
while (1) {
for (i = 0; i < seg.nseg; i++)
if (seg.scb[i].n >= 0) {
fprintf(stdout, "segment %d age %d",
seg.scb[i].n, seg.scb[i].age);
if (i == seg.cur)
fprintf(stdout, " current");
fprintf(stdout, "\n");
}
fprintf(stdout, "\nenter row col: ");
if (!fgets(data, 20, stdin))
break;
if (sscanf(data, "%1s", junk) != 1)
continue;
if (sscanf(data, "%d%d", &row, &col) != 2)
fprintf(stdout, "??\n");
else if (row < 0 || row >= NROWS || col < 0 || col >= NCOLS)
fprintf(stdout, "bad row/col value(s)\n");
else {
segment_get(&seg, data, row, col);
fprintf(stdout, "data = %d %d\n", data[0], data[1]);
}
}
segment_release(&seg);
close(fd);
return 0;
}
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