/*!
* \brief Write raster range file (floating-point)
*
* Write the floating point range file <tt>f_range</tt>. This file is
* written in binary using XDR format. If there is no defined min/max
* in <em>range</em>, an empty <tt>f_range</tt> file is created.
*
* \param name map name
* \param range pointer to FPRange which holds fp range info
*/
void Rast_write_fp_range(const char *name, const struct FPRange *range)
{
int fd;
char xdr_buf[2][XDR_DOUBLE_NBYTES];
Rast_init();
fd = G_open_new_misc("cell_misc", "f_range", name);
if (fd < 0) {
G_remove_misc("cell_misc", "f_range", name);
G_fatal_error(_("Unable to write range file for <%s>"), name);
}
/* if range hasn't been updated, write empty file meaning Nulls */
if (range->first_time) {
close(fd);
return;
}
G_xdr_put_double(xdr_buf[0], &range->min);
G_xdr_put_double(xdr_buf[1], &range->max);
if (write(fd, xdr_buf, sizeof(xdr_buf)) != sizeof(xdr_buf)) {
G_remove_misc("cell_misc", "f_range", name);
G_fatal_error(_("Unable to write range file for <%s>"), name);
}
close(fd);
}
int main(int argc, char *argv[])
{
char *name, *mapset;
char rname[GNAME_MAX], rmapset[GMAPSET_MAX];
char path[GPATH_MAX];
int row, col, null_fd;
unsigned char *null_bits;
RASTER_MAP_TYPE map_type;
int change_null = 0, create, remove, only_int, only_fp, only_null;
int is_reclass;
struct GModule *module;
struct
{
struct Option *map;
struct Option *setnull;
struct Option *null;
} parms;
struct
{
struct Flag *f;
struct Flag *n;
struct Flag *i;
struct Flag *c;
struct Flag *r;
} flags;
G_gisinit(argv[0]);
module = G_define_module();
module->keywords = _("raster, null data");
module->description = _("Manages NULL-values of given raster map.");
parms.map = G_define_standard_option(G_OPT_R_MAP);
parms.map->description = _("Name of raster map for which to edit null file");
parms.setnull = G_define_option();
parms.setnull->key = "setnull";
parms.setnull->key_desc = "val[-val]";
parms.setnull->type = TYPE_STRING;
parms.setnull->required = NO;
parms.setnull->multiple = YES;
parms.setnull->description = _("List of cell values to be set to NULL");
parms.setnull->guisection = _("Modify");
parms.null = G_define_option();
parms.null->key = "null";
parms.null->type = TYPE_DOUBLE;
parms.null->required = NO;
parms.null->multiple = NO;
parms.null->description = _("The value to replace the null value by");
parms.null->guisection = _("Modify");
flags.f = G_define_flag();
flags.f->key = 'f';
flags.f->description = _("Only do the work if the map is floating-point");
flags.f->guisection = _("Check");
flags.i = G_define_flag();
flags.i->key = 'i';
flags.i->description = _("Only do the work if the map is integer");
flags.i->guisection = _("Check");
flags.n = G_define_flag();
flags.n->key = 'n';
flags.n->description =
_("Only do the work if the map doesn't have a NULL-value bitmap file");
flags.n->guisection = _("Check");
flags.c = G_define_flag();
flags.c->key = 'c';
flags.c->description =
_("Create NULL-value bitmap file validating all data cells");
flags.r = G_define_flag();
flags.r->key = 'r';
flags.r->description = _("Remove NULL-value bitmap file");
flags.r->guisection = _("Remove");
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
only_int = flags.i->answer;
only_fp = flags.f->answer;
only_null = flags.n->answer;
create = flags.c->answer;
remove = flags.r->answer;
name = parms.map->answer;
mapset = G_find_cell2(name, "");
if (mapset == NULL)
G_fatal_error(_("Raster map <%s> not found"), name);
is_reclass = (G_is_reclass(name, mapset, rname, rmapset) > 0);
if (is_reclass)
G_fatal_error(_("Raster map <%s> is a reclass of map <%s@%s>. "
"Consider to generate a copy with r.mapcalc. Exiting."),
name, rname, rmapset);
if (strcmp(mapset, G_mapset()) != 0)
G_fatal_error(_("Raster map <%s> is not in your mapset <%s>"),
name, G_mapset());
if (parms.null->answer) {
if (sscanf(parms.null->answer, "%lf", &new_null) == 1)
change_null = 1;
else
G_fatal_error(_("%s is illegal entry for null"),
parms.null->answer);
}
map_type = G_raster_map_type(name, mapset);
if (only_null && G_find_file_misc("cell_misc", "null", name, mapset))
G_fatal_error(_("Raster map <%s> already has a null bitmap file"), name);
if (map_type == CELL_TYPE) {
if (only_fp)
G_fatal_error(_("<%s> is integer raster map (CELL)"),
name);
if ((double)((int)new_null) != new_null) {
G_warning(_("<%s> is integer raster map (CELL). Using null=%d."),
name, (int)new_null);
new_null = (double)((int)new_null);
}
}
else if (only_int)
G_fatal_error(_("<%s> is floating pointing raster map"),
name);
parse_vallist(parms.setnull->answers, &d_mask);
if (G_get_cellhd(name, mapset, &cellhd) < 0)
G_fatal_error(_("Unable to read header of raster map <%s>"),
G_fully_qualified_name(name, mapset));
if (create) {
/* write a file of no-nulls */
null_bits = (unsigned char *)G__allocate_null_bits(cellhd.cols);
/* init all cells to 0's */
for (col = 0; col < G__null_bitstream_size(cellhd.cols); col++)
null_bits[col] = 0;
null_fd = G_open_new_misc("cell_misc", "null", name);
G_verbose_message(_("Writing new null file for raster map <%s>..."),
name);
for (row = 0; row < cellhd.rows; row++) {
G_percent(row, cellhd.rows, 1);
if (G__write_null_bits(null_fd, null_bits, row, cellhd.cols, 0) <
0)
G_fatal_error(_("Error writing null row %d"), row);
}
G_percent(row, cellhd.rows, 1);
close(null_fd);
G_done_msg(_("Raster map <%s> modified."), name);
exit(EXIT_SUCCESS);
}
if (remove) {
/* write a file of no-nulls */
G_verbose_message(_("Removing null file for raster map <%s>..."),
name);
null_fd = G_open_new_misc("cell_misc", "null", name);
G__file_name_misc(path, "cell_misc", "null", name, mapset);
unlink(path);
G_done_msg(_("Raster map <%s> modified."), name);
exit(EXIT_SUCCESS);
}
process(name, mapset, change_null, map_type);
exit(EXIT_SUCCESS);
}
