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/*
* $Id: plus.c,v 1.14 2004/11/23 10:31:34 radim Exp $
*
****************************************************************************
*
* MODULE: Vector library
*
* AUTHOR(S): Original author CERL, probably Dave Gerdes.
* Update to GRASS 5.7 Radim Blazek.
*
* PURPOSE: Lower level functions for reading/writing/manipulating vectors.
*
* COPYRIGHT: (C) 2001 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 <stdlib.h>
#include <stdio.h>
#include "gis.h"
#include "Vect.h"
/* Init head structure */
int
dig_init_plus (struct Plus_head *Plus)
{
G_debug (3, "dig_init_plus()" );
Plus->Version_Major = 0 ;
Plus->Version_Minor = 0 ;
Plus->Back_Major = 0 ;
Plus->Back_Minor = 0 ;
Plus->with_z = 0 ;
Plus->box.N = 0;
Plus->box.S = 0;
Plus->box.E = 0;
Plus->box.W = 0;
Plus->box.T = 0;
Plus->box.B = 0;
Plus->built = GV_BUILD_NONE;
Plus->Node = NULL ;
Plus->Line = NULL ;
Plus->Area = NULL ;
Plus->Isle = NULL ;
Plus->n_nodes = 0 ;
Plus->n_edges = 0 ;
Plus->n_lines = 0 ;
Plus->n_areas = 0 ;
Plus->n_isles = 0 ;
Plus->n_volumes = 0 ;
Plus->n_holes = 0 ;
Plus->alloc_nodes = 0 ;
Plus->alloc_edges = 0 ;
Plus->alloc_lines = 0 ;
Plus->alloc_areas = 0 ;
Plus->alloc_isles = 0 ;
Plus->alloc_volumes = 0 ;
Plus->alloc_holes = 0 ;
Plus->n_plines = 0 ;
Plus->n_llines = 0 ;
Plus->n_blines = 0 ;
Plus->n_clines = 0 ;
Plus->n_flines = 0 ;
Plus->n_klines = 0 ;
Plus->Node_offset = 0L ;
Plus->Edge_offset = 0L ;
Plus->Line_offset = 0L ;
Plus->Area_offset = 0L ;
Plus->Isle_offset = 0L ;
Plus->Volume_offset = 0L ;
Plus->Hole_offset = 0L ;
Plus->Node_spidx_offset = 0L ;
Plus->Edge_spidx_offset = 0L ;
Plus->Line_spidx_offset = 0L ;
Plus->Area_spidx_offset = 0L ;
Plus->Isle_spidx_offset = 0L ;
Plus->Volume_spidx_offset = 0L ;
Plus->Hole_spidx_offset = 0L ;
dig_spidx_init ( Plus );
dig_cidx_init ( Plus );
return 1;
}
void
dig_free_plus_nodes (struct Plus_head *Plus)
{
int i;
P_NODE *Node;
G_debug(2, "dig_free_plus_nodes()");
/* Nodes */
if ( Plus->Node ) { /* it may be that header only is loaded */
for (i = 1; i <= Plus->n_nodes; i++) {
Node = Plus->Node[i];
if ( Node == NULL ) continue;
if ( Node->alloc_lines > 0 ) {
free ( Node->lines);
free ( Node->angles);
}
free (Node);
}
free ( Plus->Node );
}
Plus->Node = NULL ;
Plus->n_nodes = 0 ;
Plus->alloc_nodes = 0 ;
}
void
dig_free_plus_lines (struct Plus_head *Plus)
{
int i;
P_LINE *Line;
G_debug(2, "dig_free_plus_lines()");
/* Lines */
if ( Plus->Line ) { /* it may be that header only is loaded */
for (i = 1; i <= Plus->n_lines; i++) {
Line = Plus->Line[i];
if ( Line == NULL ) continue;
free (Line);
}
free ( Plus->Line );
}
Plus->Line = NULL ;
Plus->n_lines = 0 ;
Plus->alloc_lines = 0 ;
Plus->n_plines = 0 ;
Plus->n_llines = 0 ;
Plus->n_blines = 0 ;
Plus->n_clines = 0 ;
Plus->n_flines = 0 ;
Plus->n_klines = 0 ;
}
void
dig_free_plus_areas (struct Plus_head *Plus)
{
int i;
P_AREA *Area;
G_debug(2, "dig_free_plus_areas()");
/* Areas */
if ( Plus->Area ) { /* it may be that header only is loaded */
for (i = 1; i <= Plus->n_areas; i++) {
Area = Plus->Area[i];
if ( Area == NULL ) continue;
if ( Area->alloc_lines > 0 )
free ( Area->lines);
if ( Area->alloc_isles > 0 )
free ( Area->isles);
free (Area);
}
free ( Plus->Area );
}
Plus->Area = NULL ;
Plus->n_areas = 0 ;
Plus->alloc_areas = 0 ;
}
void
dig_free_plus_isles (struct Plus_head *Plus)
{
int i;
P_ISLE *Isle;
G_debug(2, "dig_free_plus_isles()");
/* Isles */
if ( Plus->Isle ) { /* it may be that header only is loaded */
for (i = 1; i <= Plus->n_isles; i++) {
Isle = Plus->Isle[i];
if ( Isle == NULL ) continue;
if ( Isle->alloc_lines > 0 )
free ( Isle->lines);
free (Isle);
}
free ( Plus->Isle );
}
Plus->Isle = NULL ;
Plus->n_isles = 0 ;
Plus->alloc_isles = 0 ;
}
/* Free head structure.
* Structure is not inited and dig_init_plus() should follow.
*/
void
dig_free_plus (struct Plus_head *Plus)
{
G_debug(2, "dig_free_plus()");
dig_free_plus_nodes (Plus);
dig_free_plus_lines (Plus);
dig_free_plus_areas (Plus);
dig_free_plus_isles (Plus);
dig_cidx_free(Plus);
}
/* dig_load_plus reads topo file to topo structure
*
* Returns : 1 success
* 0 error
*/
int
dig_load_plus ( struct Plus_head *Plus, GVFILE * plus, int head_only)
{
int i;
G_debug (1, "dig_load_plus()");
/* TODO
if (do_checks)
dig_do_file_checks (map, map->plus_file, map->digit_file);
*/
/* free and init old */
dig_init_plus ( Plus );
/* Now let's begin reading the Plus file nodes, lines, areas and isles */
if ( dig_Rd_Plus_head (plus, Plus) == -1 ) return 0;
if ( head_only ) return 1;
dig_set_cur_port ( &(Plus->port) );
/* Nodes */
if ( dig_fseek (plus, Plus->Node_offset, 0) == -1 )
G_fatal_error ("Cannot read topo for nodes" );
dig_alloc_nodes ( Plus, Plus->n_nodes );
for (i = 1; i <= Plus->n_nodes; i++)
{
if ( dig_Rd_P_node ( Plus, i, plus) == -1 )
G_fatal_error ("Cannot read topo for node %d", i);
}
/* Lines */
if ( dig_fseek (plus, Plus->Line_offset, 0) == -1 )
G_fatal_error ("Cannot read topo for lines" );
dig_alloc_lines ( Plus, Plus->n_lines );
for (i = 1; i <= Plus->n_lines; i++)
{
if ( dig_Rd_P_line ( Plus, i, plus) == -1 )
G_fatal_error ("Cannot read topo for line %d", i);
}
/* Areas */
if ( dig_fseek (plus, Plus->Area_offset, 0) == -1 )
G_fatal_error ("Cannot read topo for areas" );
dig_alloc_areas ( Plus, Plus->n_areas );
for (i = 1; i <= Plus->n_areas; i++)
{
if ( dig_Rd_P_area ( Plus, i, plus) == -1 )
G_fatal_error ("Cannot read topo for area %d", i);
}
/* Isles */
if ( dig_fseek (plus, Plus->Isle_offset, 0) == -1 )
G_fatal_error ("Cannot read topo for isles" );
dig_alloc_isles ( Plus, Plus->n_isles );
for (i = 1; i <= Plus->n_isles; i++)
{
if ( dig_Rd_P_isle ( Plus, i, plus) == -1 )
G_fatal_error ("Cannot read topo for isle %d", i);
}
return (1);
}
int
dig_write_plus_file ( GVFILE * fp_plus,
struct Plus_head *Plus)
{
dig_set_cur_port(&(Plus->port));
dig_rewind (fp_plus);
if (dig_Wr_Plus_head (fp_plus, Plus) < 0)
{
fprintf (stderr, "\nERROR: Can't write head to plus file.\n");
return (-1);
}
if (dig_write_nodes (fp_plus, Plus) < 0)
{
fprintf (stderr, "\nERROR: Can't write nodes to plus file.\n");
return (-1);
}
if (dig_write_lines (fp_plus, Plus) < 0)
{
fprintf (stderr, "\nERROR: Can't write lines to plus file.\n");
return (-1);
}
if (dig_write_areas (fp_plus, Plus) < 0)
{
fprintf (stderr, "\nERROR: Can't write areas to plus file.\n");
return (-1);
}
if (dig_write_isles (fp_plus, Plus) < 0)
{
fprintf (stderr, "\nERROR: Can't write isles to plus file.\n");
return (-1);
}
dig_rewind (fp_plus);
if (dig_Wr_Plus_head (fp_plus, Plus) < 0)
{
fprintf (stderr, "\nERROR: Can't write head to plus file.\n");
return (-1);
}
dig_fflush (fp_plus);
return (0);
} /* write_plus_file() */
int
dig_write_nodes ( GVFILE * plus,
struct Plus_head *Plus)
{
int i;
Plus->Node_offset = dig_ftell (plus);
for (i = 1; i <= Plus->n_nodes; i++)
{
if (dig_Wr_P_node (Plus, i, plus) < 0)
return (-1);
}
return (0);
} /* write_nodes() */
int
dig_write_lines ( GVFILE * plus,
struct Plus_head *Plus)
{
int i;
Plus->Line_offset = dig_ftell (plus);
for (i = 1; i <= Plus->n_lines; i++)
{
if (dig_Wr_P_line (Plus, i, plus) < 0)
return (-1);
}
return (0);
} /* write_line() */
int
dig_write_areas ( GVFILE * plus,
struct Plus_head *Plus)
{
int i;
Plus->Area_offset = dig_ftell (plus);
for (i = 1; i <= Plus->n_areas; i++)
{
if (dig_Wr_P_area (Plus, i, plus) < 0)
return (-1);
}
return (0);
} /* write_areas() */
int
dig_write_isles ( GVFILE * plus,
struct Plus_head *Plus)
{
int i;
Plus->Isle_offset = dig_ftell (plus);
for (i = 1; i <= Plus->n_isles; i++)
{
if (dig_Wr_P_isle (Plus, i, plus) < 0)
return (-1);
}
return (0);
} /* write_isles() */
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