spatialite-sys 0.2.0

/*

    GeoPackage extensions for SpatiaLite / SQLite
 
Version: MPL 1.1/GPL 2.0/LGPL 2.1

The contents of this file are subject to the Mozilla Public License Version
1.1 (the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.mozilla.org/MPL/
 
Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
for the specific language governing rights and limitations under the
License.

The Original Code is GeoPackage Extensions

The Initial Developer of the Original Code is Brad Hards (bradh@frogmouth.net)
 
Portions created by the Initial Developer are Copyright (C) 2012-2015
the Initial Developer. All Rights Reserved.

Contributor(s):

Alternatively, the contents of this file may be used under the terms of
either the GNU General Public License Version 2 or later (the "GPL"), or
the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
in which case the provisions of the GPL or the LGPL are applicable instead
of those above. If you wish to allow use of your version of this file only
under the terms of either the GPL or the LGPL, and not to allow others to
use your version of this file under the terms of the MPL, indicate your
decision by deleting the provisions above and replace them with the notice
and other provisions required by the GPL or the LGPL. If you do not delete
the provisions above, a recipient may use your version of this file under
the terms of any one of the MPL, the GPL or the LGPL.
 
*/

#include "spatialite/geopackage.h"
#include "config.h"
#include "geopackage_internal.h"

#ifdef ENABLE_GEOPACKAGE
GEOPACKAGE_PRIVATE void
fnct_gpkgCreateTilesTable (sqlite3_context * context, int argc
			   __attribute__ ((unused)), sqlite3_value ** argv)
{
/* SQL function:
/ gpkgCreateTilesTable(table_name, srid, min_x, min_y, max_x, max_y)
/
/ Create a new (empty) Tiles table and the triggers for that table
/ It also adds in the matching entries into gpkg_contents and gpkg_tile_matrix_set
/
/ TODO: consider adding description and identifier to gpkg_contents
/
/ returns nothing on success, raises exception on error
/ 
/ This function assumes usual tile conventions, including that the tiles are power-of-two-zoom.
/
*/
    const unsigned char *table;
    int srid = -1;
    double min_x;
    double min_y;
    double max_x;
    double max_y;
    char *sql_stmt = NULL;
    sqlite3 *sqlite = NULL;
    char *errMsg = NULL;
    int ret = 0;
    int i = 0;

    const char *metaTableSchemas[] = {
	"INSERT INTO gpkg_contents (table_name, data_type, srs_id, min_x, min_y, max_x, max_y) VALUES (%Q, 'tiles', %i, %f, %f, %f, %f)",
	"INSERT INTO gpkg_tile_matrix_set (table_name, srs_id, min_x, min_y, max_x, max_y) VALUES (%Q, %i, %f, %f, %f, %f)",
	NULL
    };

    const char *tableSchemas[] = {
	"CREATE TABLE %q (\n"
	    "id INTEGER PRIMARY KEY AUTOINCREMENT,\n"
	    "zoom_level INTEGER NOT NULL DEFAULT 0,\n"
	    "tile_column INTEGER NOT NULL DEFAULT 0,\n"
	    "tile_row INTEGER NOT NULL DEFAULT 0,\n"
	    "tile_data BLOB NOT NULL,\n"
	    "UNIQUE (zoom_level, tile_column, tile_row))",

	"SELECT gpkgAddTileTriggers(%Q)",

	NULL
    };

    if (sqlite3_value_type (argv[0]) != SQLITE_TEXT)
      {
	  sqlite3_result_error (context,
				"gpkgCreateTilesTable() error: argument 1 [table] is not of the String type",
				-1);
	  return;
      }
    table = sqlite3_value_text (argv[0]);

    if (sqlite3_value_type (argv[1]) != SQLITE_INTEGER)
      {
	  sqlite3_result_error (context,
				"gpkgCreateTilesTable() error: argument 2 [srid] is not of the integer type",
				-1);
	  return;
      }
    srid = sqlite3_value_int (argv[1]);

    if (sqlite3_value_type (argv[2]) == SQLITE_FLOAT)
      {
	  min_x = sqlite3_value_double (argv[2]);
      }
    else if (sqlite3_value_type (argv[2]) == SQLITE_INTEGER)
      {
	  min_x = (double) sqlite3_value_int (argv[2]);
      }
    else
      {
	  sqlite3_result_error (context,
				"gpkgCreateTilesTable() error: argument 3 [min_x] is not a numeric type",
				-1);
	  return;
      }

    if (sqlite3_value_type (argv[3]) == SQLITE_FLOAT)
      {
	  min_y = sqlite3_value_double (argv[3]);
      }
    else if (sqlite3_value_type (argv[3]) == SQLITE_INTEGER)
      {
	  min_y = (double) sqlite3_value_int (argv[3]);
      }
    else
      {
	  sqlite3_result_error (context,
				"gpkgCreateTilesTable() error: argument 4 [min_y] is not a numeric type",
				-1);
	  return;
      }

    if (sqlite3_value_type (argv[4]) == SQLITE_FLOAT)
      {
	  max_x = sqlite3_value_double (argv[4]);
      }
    else if (sqlite3_value_type (argv[4]) == SQLITE_INTEGER)
      {
	  max_x = (double) sqlite3_value_int (argv[4]);
      }
    else
      {
	  sqlite3_result_error (context,
				"gpkgCreateTilesTable() error: argument 5 [max_x] is not a numeric type",
				-1);
	  return;
      }

    if (sqlite3_value_type (argv[5]) == SQLITE_FLOAT)
      {
	  max_y = sqlite3_value_double (argv[5]);
      }
    else if (sqlite3_value_type (argv[5]) == SQLITE_INTEGER)
      {
	  max_y = (double) sqlite3_value_int (argv[5]);
      }
    else
      {
	  sqlite3_result_error (context,
				"gpkgCreateTilesTable() error: argument 6 [max_y] is not a numeric type",
				-1);
	  return;
      }
    sqlite = sqlite3_context_db_handle (context);

    for (i = 0; metaTableSchemas[i] != NULL; ++i)
      {
	  sql_stmt =
	      sqlite3_mprintf (metaTableSchemas[i], table, srid, min_x, min_y,
			       max_x, max_y);
	  ret = sqlite3_exec (sqlite, sql_stmt, NULL, NULL, &errMsg);
	  sqlite3_free (sql_stmt);
	  if (ret != SQLITE_OK)
	    {
		sqlite3_result_error (context, errMsg, -1);
		sqlite3_free (errMsg);
		return;
	    }
      }

    for (i = 0; tableSchemas[i] != NULL; ++i)
      {
	  sql_stmt = sqlite3_mprintf (tableSchemas[i], table);
	  ret = sqlite3_exec (sqlite, sql_stmt, NULL, NULL, &errMsg);
	  sqlite3_free (sql_stmt);
	  if (ret != SQLITE_OK)
	    {
		sqlite3_result_error (context, errMsg, -1);
		sqlite3_free (errMsg);
		return;
	    }
      }
}
#endif