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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <grass/raster.h>
#include "raster3d_intern.h"
/*---------------------------------------------------------------------------*/
int Rast3d_is_xdr_null_num(const void *num, int isFloat)
{
static const char null_bytes[8] = {(char)0xFF, (char)0xFF, (char)0xFF,
(char)0xFF, (char)0xFF, (char)0xFF,
(char)0xFF, (char)0xFF};
return memcmp(num, null_bytes, isFloat ? 4 : 8) == 0;
}
/*---------------------------------------------------------------------------*/
int Rast3d_is_xdr_null_float(const float *f)
{
return Rast3d_is_xdr_null_num(f, 1);
}
/*---------------------------------------------------------------------------*/
int Rast3d_is_xdr_null_double(const double *d)
{
return Rast3d_is_xdr_null_num(d, 0);
}
/*---------------------------------------------------------------------------*/
void Rast3d_set_xdr_null_num(void *num, int isFloat)
{
static const char null_bytes[8] = {(char)0xFF, (char)0xFF, (char)0xFF,
(char)0xFF, (char)0xFF, (char)0xFF,
(char)0xFF, (char)0xFF};
memcpy(num, null_bytes, isFloat ? 4 : 8);
}
/*---------------------------------------------------------------------------*/
void Rast3d_set_xdr_null_double(double *d)
{
Rast3d_set_xdr_null_num(d, 0);
}
/*---------------------------------------------------------------------------*/
void Rast3d_set_xdr_null_float(float *f)
{
Rast3d_set_xdr_null_num(f, 1);
}
/*---------------------------------------------------------------------------*/
static size_t xdr_off;
int Rast3d_init_fp_xdr(RASTER3D_Map *map, int misuseBytes)
/* nof addtl bytes allocated for the xdr array so that */
/* the array can also be (mis)used for other purposes */
{
if (xdr == NULL) {
xdrLength = map->tileSize * RASTER3D_MAX(map->numLengthExtern,
map->numLengthIntern) +
misuseBytes;
xdr = Rast3d_malloc(xdrLength);
if (xdr == NULL) {
Rast3d_error("Rast3d_init_fp_xdr: error in Rast3d_malloc");
return 0;
}
}
else if (map->tileSize *
RASTER3D_MAX(map->numLengthExtern, map->numLengthIntern) +
misuseBytes >
xdrLength) {
xdrLength = map->tileSize * RASTER3D_MAX(map->numLengthExtern,
map->numLengthIntern) +
misuseBytes;
xdr = Rast3d_realloc(xdr, xdrLength);
if (xdr == NULL) {
Rast3d_error("Rast3d_init_fp_xdr: error in Rast3d_realloc");
return 0;
}
}
return 1;
}
/*---------------------------------------------------------------------------*/
static void *xdrTmp;
static int dstType, srcType, type, externLength, eltLength, isFloat, useXdr;
static double tmpValue, *tmp;
int Rast3d_init_copy_to_xdr(RASTER3D_Map *map, int sType)
{
xdrTmp = xdr;
useXdr = map->useXdr;
srcType = sType;
if (map->useXdr == RASTER3D_USE_XDR)
xdr_off = 0;
type = map->type;
isFloat = (type == FCELL_TYPE);
externLength = Rast3d_extern_length(type);
eltLength = Rast3d_length(srcType);
tmp = &tmpValue;
return 1;
}
/*---------------------------------------------------------------------------*/
static int xdr_put(const void *src)
{
if (isFloat) {
if (xdr_off + RASTER3D_XDR_FLOAT_LENGTH > (size_t)xdrLength)
return 0;
G_xdr_put_float((char *)xdr + xdr_off, src);
xdr_off += RASTER3D_XDR_FLOAT_LENGTH;
}
else {
if (xdr_off + RASTER3D_XDR_DOUBLE_LENGTH > (size_t)xdrLength)
return 0;
G_xdr_put_double((char *)xdr + xdr_off, src);
xdr_off += RASTER3D_XDR_DOUBLE_LENGTH;
}
return 1;
}
/*---------------------------------------------------------------------------*/
int Rast3d_copy_to_xdr(const void *src, int nofNum)
{
int i;
if (useXdr == RASTER3D_NO_XDR) {
Rast3d_copy_values(src, 0, srcType, xdrTmp, 0, type, nofNum);
xdrTmp = G_incr_void_ptr(xdrTmp, nofNum * Rast3d_extern_length(type));
return 1;
}
for (i = 0; i < nofNum; i++, src = G_incr_void_ptr(src, eltLength)) {
if (Rast3d_is_null_value_num(src, srcType)) {
Rast3d_set_xdr_null_num(xdrTmp, isFloat);
xdr_off += externLength;
}
else {
if (type == srcType) {
if (!xdr_put(src)) {
Rast3d_error("Rast3d_copy_to_xdr: writing xdr failed");
return 0;
}
}
else {
if (type == FCELL_TYPE)
*((float *)tmp) = (float)*((double *)src);
else
*((double *)tmp) = (double)*((float *)src);
if (!xdr_put(tmp)) {
Rast3d_error("Rast3d_copy_to_xdr: writing xdr failed");
return 0;
}
}
}
xdrTmp = G_incr_void_ptr(xdrTmp, externLength);
}
return 1;
}
/*---------------------------------------------------------------------------*/
int Rast3d_init_copy_from_xdr(RASTER3D_Map *map, int dType)
{
xdrTmp = xdr;
useXdr = map->useXdr;
dstType = dType;
if (useXdr == RASTER3D_USE_XDR)
xdr_off = 0;
type = map->type;
isFloat = (type == FCELL_TYPE);
externLength = Rast3d_extern_length(type);
eltLength = Rast3d_length(dstType);
tmp = &tmpValue;
return 1;
}
/*---------------------------------------------------------------------------*/
static int xdr_get(void *src)
{
if (isFloat) {
if (xdr_off + RASTER3D_XDR_FLOAT_LENGTH > (size_t)xdrLength)
return 0;
G_xdr_get_float(src, (char *)xdr + xdr_off);
xdr_off += RASTER3D_XDR_FLOAT_LENGTH;
}
else {
if (xdr_off + RASTER3D_XDR_DOUBLE_LENGTH > (size_t)xdrLength)
return 0;
G_xdr_get_double(src, (char *)xdr + xdr_off);
xdr_off += RASTER3D_XDR_DOUBLE_LENGTH;
}
return 1;
}
/*---------------------------------------------------------------------------*/
int Rast3d_copy_from_xdr(int nofNum, void *dst)
{
int i;
if (useXdr == RASTER3D_NO_XDR) {
Rast3d_copy_values(xdrTmp, 0, type, dst, 0, dstType, nofNum);
xdrTmp = G_incr_void_ptr(xdrTmp, nofNum * Rast3d_extern_length(type));
return 1;
}
for (i = 0; i < nofNum; i++, dst = G_incr_void_ptr(dst, eltLength)) {
if (Rast3d_is_xdr_null_num(xdrTmp, isFloat)) {
Rast3d_set_null_value(dst, 1, dstType);
xdr_off += externLength;
}
else {
if (type == dstType) {
if (!xdr_get(dst)) {
Rast3d_error("Rast3d_copy_from_xdr: reading xdr failed");
return 0;
}
}
else {
if (!xdr_get(tmp)) {
Rast3d_error("Rast3d_copy_from_xdr: reading xdr failed");
return 0;
}
if (type == FCELL_TYPE)
*((double *)dst) = (double)*((float *)tmp);
else
*((float *)dst) = (float)*((double *)tmp);
}
}
xdrTmp = G_incr_void_ptr(xdrTmp, externLength);
}
return 1;
}
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