#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#include "G3d_intern.h"


/*---------------------------------------------------------------------------*/

static int
G3d_tile2xdrTile  (G3D_Map *map, char *tile, int rows, int cols, int depths, int xRedundant, int yRedundant, int zRedundant, int nofNum, int type)

{
  int y, z;

  if (! G3d_initCopyToXdr (map, type)) {
    G3d_error ("G3d_tile2xdrTile: error in G3d_initCopyToXdr");
    return 0;
  }
    

  if (nofNum == map->tileSize) {
    if (! G3d_copyToXdr (tile, map->tileSize)) {
      G3d_error ("G3d_tile2xdrTile: error in G3d_copyToXdr");
      return 0;
    }
    return 1;
  }

  if (xRedundant) {
    for (z = 0; z < depths; z++) {
      for (y = 0; y < rows; y++) {
	if (! G3d_copyToXdr (tile, cols)) {
	  G3d_error ("G3d_tile2xdrTile: error in G3d_copyToXdr");
	  return 0;
	}
	tile += map->tileX * G3d_length (type);
      }
      if (yRedundant) 
	tile += map->tileX * yRedundant * G3d_length (type);
    }
    return 1;
  }

  if (yRedundant) {
    for (z = 0; z < depths; z++) {
      if (! G3d_copyToXdr (tile, map->tileX * rows)) {
	G3d_error ("G3d_tile2xdrTile: error in G3d_copyToXdr");
	return 0;
      }
      tile += map->tileXY * G3d_length (type);
    }
    return 1;
  }

  if (! G3d_copyToXdr (tile, map->tileXY * depths)) {
    G3d_error ("G3d_tile2xdrTile: error in G3d_copyToXdr");
    return 0;
  }
  return 1;
}

/*---------------------------------------------------------------------------*/

static int
G3d_writeTileUncompressed  (G3D_Map *map, int nofNum)

{
  if (write (map->data_fd, xdr, map->numLengthExtern * nofNum) != 
      map->numLengthExtern * nofNum) {
    G3d_error ("G3d_writeTileUncompressed: can't write file.");
    return 0;
  }

  return 1;
}

/*---------------------------------------------------------------------------*/

static int
G3d_writeTileCompressed  (G3D_Map *map, int nofNum)

{
  if (! G_fpcompress_writeXdrNums (map->data_fd, xdr, nofNum, map->precision, 
				   tmpCompress, map->type == G3D_FLOAT,
				   map->useRle, map->useLzw)) {
    G3d_error (
	       "G3d_writeTileCompressed: error in G_fpcompress_writeXdrNums");
    return 0;
  }

  return 1;
}

/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/

                       /* EXPORTED FUNCTIONS */

/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/

 
/*!
 * \brief 
 *
 * 
 * Writes tile with index <em>tileIndex</em> to the file corresponding to <em>map</em>. 
 * It is assumed that the cells in <em>tile</em> are of <em>type</em> which
 * must be one of G3D_FLOAT and G3D_DOUBLE.  The actual type used to write the
 * tile depends on the type specified at the time when <em>map</em> is initialized.
 * A tile can only be written once. Subsequent attempts to write the same tile
 * are ignored.
 *
 *  \param map
 *  \param tileIndex
 *  \param tile
 *  \param type
 *  \return 1 ... if successful,
 *          2 ... if write request was ignored,
 *          0 ... otherwise.
 */

int
G3d_writeTile  (G3D_Map *map, int tileIndex, char *tile, int type)

{
  int rows, cols, depths, xRedundant, yRedundant, zRedundant, nofNum;

  /* valid tileIndex ? */
  if ((tileIndex >= map->nTiles) || (tileIndex < 0))
    G3d_fatalError ("G3d_writeTile: tileIndex out of range");

  /* already written ? */
  if (map->index[tileIndex] != -1) return 2;

  /* save the file position */
  map->index[tileIndex] = lseek (map->data_fd, (long) 0, SEEK_END);
  if (map->index[tileIndex] == -1) {
    G3d_error ("G3d_writeTile: can't position file");
    return 0;
  }

  nofNum = G3d_computeClippedTileDimensions (map, tileIndex, 
					     &rows, &cols, &depths,
					     &xRedundant, &yRedundant, 
					     &zRedundant);

  G3d_range_updateFromTile (map, tile, rows, cols, depths,
			    xRedundant, yRedundant, zRedundant, nofNum, type);

  if (! G3d_tile2xdrTile (map, tile, rows, cols, depths,
			  xRedundant, yRedundant, zRedundant, nofNum, type)) {
    G3d_error ("G3d_writeTileCompressed: error in G3d_tile2xdrTile");
    return 0;
  }

  if (map->compression == G3D_NO_COMPRESSION) {
    if (! G3d_writeTileUncompressed (map, nofNum)) {
      G3d_error ("G3d_writeTile: error in G3d_writeTileUncompressed");
      return 0;
    }
  } else
    if (! G3d_writeTileCompressed (map, nofNum)) {
      G3d_error ("G3d_writeTile: error in G3d_writeTileCompressed");
      return 0;
    }

  /* compute the length */
  map->tileLength[tileIndex] = lseek (map->data_fd, (long) 0, SEEK_END) -
                               map->index[tileIndex];

  return 1;
}

/*---------------------------------------------------------------------------*/


/*!
 * \brief 
 *
 *  Is equivalent to <tt>G3d_writeTile (map, tileIndex, tile, G3D_FLOAT).</tt>
 *
 *  \param map
 *  \param tileIndex
 *  \param tile
 *  \return int
 */

int
G3d_writeTileFloat  (G3D_Map *map, int tileIndex, char *tile)

{
  int status;
  
  if ((status = G3d_writeTile (map, tileIndex, tile, G3D_FLOAT))) return status;

  G3d_error ("G3d_writeTileFloat: error in G3d_writeTile");
  return 0;
}

/*---------------------------------------------------------------------------*/


/*!
 * \brief 
 *
 * Is equivalent to <tt>G3d_writeTile (map, tileIndex, tile, G3D_DOUBLE).</tt>
 *
 *  \param map
 *  \param tileIndex
 *  \param tile
 *  \return int
 */

int
G3d_writeTileDouble  (G3D_Map *map, int tileIndex, char *tile)

{
  int status;

  if ((status = G3d_writeTile (map, tileIndex, tile, G3D_DOUBLE))) return status;

  G3d_error ("G3d_writeTileDouble: error in G3d_writeTile");
  return 0;
}

/*---------------------------------------------------------------------------*/

                      /* CACHE-MODE-ONLY FUNCTIONS */

/*---------------------------------------------------------------------------*/


/*!
 * \brief 
 *
 *  Writes the tile with
 * <em>tileIndex</em> to the file corresponding to <em>map</em> and removes the tile
 * from the cache (in non-cache mode the buffer provided by the map-structure is
 * written).
 * If this tile has already been written before the write request is ignored.
 * If the tile was never referred to before the invokation of G3d_flushTile, a
 * tile filled with NULL-values is written.
 *
 *  \param map
 *  \param tileIndex
 *  \return 1 ... if successful,
 *          0 ... otherwise.
 */

int
G3d_flushTile  (G3D_Map *map, int tileIndex)

{
  char *tile;

  tile = G3d_getTilePtr (map, tileIndex);
  if (tile == NULL) {
    G3d_error ("G3d_flushTile: error in G3d_getTilePtr");
    return 0;
  }

  if (! G3d_writeTile (map, tileIndex, tile, map->typeIntern)) {
    G3d_error ("G3d_flushTile: error in G3d_writeTile");
    return 0;
  }

  if (! G3d__removeTile (map, tileIndex)) {
    G3d_error ("G3d_flushTile: error in G3d__removeTile");
    return 0;
  }

  return 1;
}

/*---------------------------------------------------------------------------*/

#ifndef MIN
#define MIN(a,b) (a < b ? a : b)
#define MAX(a,b) (a > b ? a : b)
#endif


/*!
 * \brief 
 *
 *  Writes the tiles with tile-coordinates
 * contained in the axis-parallel cube with vertices <em>(xMin, yMin, zMin)</em>
 * and <em>(xMax, yMax, zMax</em>).  Tiles which are not stored in the cache are
 * written as NULL-tiles.  Write attempts for tiles which have already been
 * written earlier are ignored.
 *
 *  \param map
 *  \param xMin
 *  \param yMin
 *  \param zMin
 *  \param xMax
 *  \param yMax
 *  \param zMax
 *  \return 1 ... if successful,
 *          0 ... otherwise.
 */

int
G3d_flushTileCube  (G3D_Map *map, int xMin, int yMin, int zMin, int xMax, int yMax, int zMax)

{
  int x, y, z;

  if (! map->useCache) 
    G3d_fatalError ("G3d_flushTileCube: function invalid in non-cache mode");

  for (x = xMin; x <= xMax; x++)
    for (y = yMin; y <= yMax; y++)
      for (z = zMin; z <= zMax; z++) 
	if (! G3d_flushTile (map, G3d_tile2tileIndex (map, x, y, z))) {
	  G3d_error ("G3d_flushTileCube: error in G3d_flushTile");
	  return 0;
	}

  return 1;
}

/*---------------------------------------------------------------------------*/


/*!
 * \brief 
 *
 *  Writes those tiles for which
 * <em>every</em> cell has coordinate contained in the axis-parallel cube
 * defined by the vertices with cell-coordinates <em>(xMin, yMin, zMin)</em>
 * and <em>(xMax, yMax, zMax)</em>.
 * Tiles which are not stored in the cache are written as NULL-tiles.
 * Write attempts for tiles which have already been written earlier are
 * ignored.
 *
 *  \param map
 *  \param xMin
 *  \param yMin
 *  \param zMin
 *  \param xMax
 *  \param yMax
 *  \param zMax
 *  \return 1 ... if successful,
 *          0 ... otherwise.
 */

int
G3d_flushTilesInCube  (G3D_Map *map, int xMin, int yMin, int zMin, int xMax, int yMax, int zMax)

{
  int xTileMin, yTileMin, zTileMin, xTileMax, yTileMax, zTileMax;
  int xOffs, yOffs, zOffs;
  int regionMaxX, regionMaxY, regionMaxZ;

  if (! map->useCache) 
    G3d_fatalError ("G3d_flushTilesInCube: function invalid in non-cache mode");
/*AV*/
/*BEGIN OF ORIGINAL CODE */
/*
 *  G3d_getCoordsMap (map, &regionMaxX, &regionMaxY, &regionMaxZ);
*/

/*AV*/
/* BEGIN OF MY CODE */
  G3d_getCoordsMap (map, &regionMaxY, &regionMaxX, &regionMaxZ);
/* END OF MY CODE */

  if ((xMin < 0) && (xMax < 0))
    G3d_fatalError ("G3d_flushTilesInCube: coordinate out of Range");
  if ((xMin >= regionMaxX) && (xMax >= regionMaxX))
    G3d_fatalError ("G3d_flushTilesInCube: coordinate out of Range");

  xMin = MIN (MAX (0, xMin), regionMaxX - 1);

  if ((yMin < 0) && (yMax < 0))
    G3d_fatalError ("G3d_flushTilesInCube: coordinate out of Range");
  if ((yMin >= regionMaxY) && (yMax >= regionMaxY))
    G3d_fatalError ("G3d_flushTilesInCube: coordinate out of Range");

  yMin = MIN (MAX (0, yMin), regionMaxY - 1);

  if ((zMin < 0) && (zMax < 0))
    G3d_fatalError ("G3d_flushTilesInCube: coordinate out of Range");
  if ((zMin >= regionMaxZ) && (zMax >= regionMaxZ))
    G3d_fatalError ("G3d_flushTilesInCube: coordinate out of Range");

  zMin = MIN (MAX (0, zMin), regionMaxZ - 1);

  G3d_coord2tileCoord (map, xMin, yMin, zMin, 
		       &xTileMin, &yTileMin, &zTileMin, 
		       &xOffs, &yOffs, &zOffs);
  
  if (xOffs != 0) xTileMin++;
  if (yOffs != 0) yTileMin++;
  if (zOffs != 0) zTileMin++;
  
  G3d_coord2tileCoord (map, xMax + 1, yMax + 1, zMax + 1, 
		       &xTileMax, &yTileMax, &zTileMax, 
		       &xOffs, &yOffs, &zOffs);
  
  xTileMax--;
  yTileMax--;
  zTileMax--;

  if (! G3d_flushTileCube (map, xTileMin, yTileMin, zTileMin, 
			   xTileMax, yTileMax, zTileMax)) {
    G3d_error ("G3d_flushTilesInCube: error in G3d_flushTileCube");
    return 0;
  }

  return 1;
}

#undef MIN
#undef MAX

/*---------------------------------------------------------------------------*/


/*!
 * \brief 
 *
 *  Is equivalent to G3d_putValue (map, x, y, z, &value, G3D_DOUBLE).
 *
 *  \param map
 *  \param x
 *  \param y
 *  \param z
 *  \param value
 *  \return int
 */

int 
G3d_putDouble ();


/*!
 * \brief 
 *
 * Is equivalent to G3d_putValue (map, x, y, z, &value, G3D_FLOAT).
 *
 *  \param map
 *  \param x
 *  \param y
 *  \param z
 *  \param value
 *  \return int
 */

int
G3d_putFloat (G3D_Map *map, int x, int y, int z, float value)

{
  int tileIndex, offs;
  float *tile;

  if (map->typeIntern == G3D_DOUBLE) {
    if (! G3d_putDouble (map, x, y, z, (double) value)) {
      G3d_error ("G3d_putFloat: error in G3d_putDouble");
      return 0;
    }
    return 1;
  }

  G3d_coord2tileIndex (map, x, y, z, &tileIndex, &offs);
  tile = (float *) G3d_getTilePtr (map, tileIndex);
  if (tile == NULL) {
    G3d_error ("G3d_putFloat: error in G3d_getTilePtr");
    return 0;
  }

  tile[offs] = value;
  return 1;
}

/*---------------------------------------------------------------------------*/


/*!
 * \brief 
 *
 *  Is equivalent to G3d_putValue (map, x, y, z, &value, G3D_DOUBLE).
 *
 *  \param map
 *  \param x
 *  \param y
 *  \param z
 *  \param value
 *  \return int
 */

int
G3d_putDouble  (G3D_Map *map, int x, int y, int z, double value)

{
  int tileIndex, offs;
  double *tile;

  if (map->typeIntern == G3D_FLOAT) {
    if (! G3d_putFloat (map, x, y, z, (float) value)) {
      G3d_error ("G3d_putDouble: error in G3d_putFloat");
      return 0;
    }
    return 1;
  }

  G3d_coord2tileIndex (map, x, y, z, &tileIndex, &offs);
  tile = (double *) G3d_getTilePtr (map, tileIndex);
  if (tile == NULL) {
    G3d_error ("G3d_putDouble: error in G3d_getTilePtr");
    return 0;
  }

  tile[offs] = value;
  return 1;
}

/*---------------------------------------------------------------------------*/
 
/*!
 * \brief 
 *
 * After converting <em>*value</em> of <em>type</em> into the type specified
 * at the initialization time (i.e. <em>typeIntern</em>) this function writes the
 * value into the tile buffer corresponding to cell-coordinate <em>(x, y, z)</em>.
 *
 *  \param map
 *  \param x
 *  \param y
 *  \param z
 *  \param value
 *  \param type
 *  \return 1 ... if successful,  
 *          0 ... otherwise.
 */

int
G3d_putValue  (G3D_Map *map, int x, int y, int z, char *value, int type)

{
  if (type == G3D_FLOAT) {
    if (! G3d_putFloat (map, x, y, z, *((float *) value))) {
      G3d_error ("G3d_putValue: error in G3d_putFloat");
      return 0;
    }
    return 1;
  }
  
  if (! G3d_putDouble (map, x, y, z, *((double *) value))) {
    G3d_error ("G3d_putValue: error in G3d_putDouble");
    return 0;
  }
  return 1;
}