Geografic-Information-System/lib/gis/get_projinfo.c

/*!
 * \file get_projinfo.c
 * 
 * \brief GIS Library - Get projection info
 *
 * (C) 1999-2008 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 <unistd.h>
#include <grass/gis.h>
#include <grass/glocale.h>

#define PERMANENT "PERMANENT"

/*!
 * \brief Gets unit information for location
 *
 * \return pointer to Key_Value structure with key/value pairs
 */
struct Key_Value *G_get_projunits(void)
{
    struct Key_Value *in_units_keys;
    char path[GPATH_MAX];

    G__file_name(path, "", UNIT_FILE, PERMANENT);
    if (access(path, 0) != 0) {
	if (G_projection() != PROJECTION_XY) {
	    G_warning(_("<%s> file not found for location <%s>"),
		      UNIT_FILE, G_location());
	}
	return NULL;
    }
    in_units_keys = G_read_key_value_file(path);

    return in_units_keys;
}

/*!
 * \brief Gets projection information for location
 *
 * \return pointer to Key_Value structure with key/value pairs
 */
struct Key_Value *G_get_projinfo(void)
{
    struct Key_Value *in_proj_keys;
    char path[GPATH_MAX];

    G__file_name(path, "", PROJECTION_FILE, PERMANENT);
    if (access(path, 0) != 0) {
	if (G_projection() != PROJECTION_XY) {
	    G_warning(_("<%s> file not found for location <%s>"),
		      PROJECTION_FILE, G_location());
	}
	return NULL;
    }
    in_proj_keys = G_read_key_value_file(path);

    return in_proj_keys;
}