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/***********************************************************************
* pc_val.c
*
* Pointclound value handling. Create, get and set values.
*
* PgSQL Pointcloud is free and open source software provided
* by the Government of Canada
* Copyright (c) 2013 Natural Resources Canada
*
***********************************************************************/
#include "pc_api_internal.h"
#include <math.h>
#include <stdint.h>
double pc_value_unscale_unoffset(double val, const PCDIMENSION *dim)
{
/* Offset value */
if (dim->offset)
val -= dim->offset;
/* Scale value */
if (dim->scale != 1)
val /= dim->scale;
return val;
}
double pc_value_scale_offset(double val, const PCDIMENSION *dim)
{
/* Scale value */
if (dim->scale != 1)
val *= dim->scale;
/* Offset value */
if (dim->offset)
val += dim->offset;
return val;
}
double pc_value_from_ptr(const uint8_t *ptr, const PCDIMENSION *dim)
{
double val = pc_double_from_ptr(ptr, dim->interpretation);
return pc_value_scale_offset(val, dim);
}
double pc_double_from_ptr(const uint8_t *ptr, uint32_t interpretation)
{
switch (interpretation)
{
case PC_UINT8:
{
uint8_t v;
memcpy(&(v), ptr, sizeof(uint8_t));
return (double)v;
}
case PC_UINT16:
{
uint16_t v;
memcpy(&(v), ptr, sizeof(uint16_t));
return (double)v;
}
case PC_UINT32:
{
uint32_t v;
memcpy(&(v), ptr, sizeof(uint32_t));
return (double)v;
}
case PC_UINT64:
{
uint64_t v;
memcpy(&(v), ptr, sizeof(uint64_t));
return (double)v;
}
case PC_INT8:
{
int8_t v;
memcpy(&(v), ptr, sizeof(int8_t));
return (double)v;
}
case PC_INT16:
{
int16_t v;
memcpy(&(v), ptr, sizeof(int16_t));
return (double)v;
}
case PC_INT32:
{
int32_t v;
memcpy(&(v), ptr, sizeof(int32_t));
return (double)v;
}
case PC_INT64:
{
int64_t v;
memcpy(&(v), ptr, sizeof(int64_t));
return (double)v;
}
case PC_FLOAT:
{
float v;
memcpy(&(v), ptr, sizeof(float));
return (double)v;
}
case PC_DOUBLE:
{
double v;
memcpy(&(v), ptr, sizeof(double));
return v;
}
default:
{
pcerror("unknown interpretation type %d encountered in pc_double_from_ptr",
interpretation);
}
}
return 0.0;
}
#define CLAMP(v, min, max, t, format) \
do \
{ \
if (v > max) \
{ \
pcwarn("Value %g truncated to " format " to fit in " t, v, max); \
v = max; \
} \
else if (v < min) \
{ \
pcwarn("Value %g truncated to " format " to fit in " t, v, min); \
v = min; \
} \
} while (0)
int pc_double_to_ptr(uint8_t *ptr, uint32_t interpretation, double val)
{
switch (interpretation)
{
case PC_UINT8:
{
uint8_t v;
CLAMP(val, 0, UINT8_MAX, "uint8_t", "%u");
v = (uint8_t)lround(val);
memcpy(ptr, &(v), sizeof(uint8_t));
break;
}
case PC_UINT16:
{
uint16_t v;
CLAMP(val, 0, UINT16_MAX, "uint16_t", "%u");
v = (uint16_t)lround(val);
memcpy(ptr, &(v), sizeof(uint16_t));
break;
}
case PC_UINT32:
{
uint32_t v;
CLAMP(val, 0, UINT32_MAX, "uint32", "%u");
v = (uint32_t)lround(val);
memcpy(ptr, &(v), sizeof(uint32_t));
break;
}
case PC_UINT64:
{
uint64_t v;
CLAMP(val, 0, UINT64_MAX, "uint64", "%u");
v = (uint64_t)lround(val);
memcpy(ptr, &(v), sizeof(uint64_t));
break;
}
case PC_INT8:
{
int8_t v;
CLAMP(val, INT8_MIN, INT8_MAX, "int8", "%d");
v = (int8_t)lround(val);
memcpy(ptr, &(v), sizeof(int8_t));
break;
}
case PC_INT16:
{
int16_t v;
CLAMP(val, INT16_MIN, INT16_MAX, "int16", "%d");
v = (int16_t)lround(val);
memcpy(ptr, &(v), sizeof(int16_t));
break;
}
case PC_INT32:
{
int32_t v;
CLAMP(val, INT32_MIN, INT32_MAX, "int32", "%d");
v = (int32_t)lround(val);
memcpy(ptr, &(v), sizeof(int32_t));
break;
}
case PC_INT64:
{
int64_t v;
CLAMP(val, INT64_MIN, INT64_MAX, "int64", "%d");
v = (int64_t)lround(val);
memcpy(ptr, &(v), sizeof(int64_t));
break;
}
case PC_FLOAT:
{
float v = (float)val;
memcpy(ptr, &(v), sizeof(float));
break;
}
case PC_DOUBLE:
{
double v = val;
memcpy(ptr, &(v), sizeof(double));
break;
}
default:
{
pcerror("unknown interpretation type %d encountered in pc_double_to_ptr",
interpretation);
return PC_FAILURE;
}
}
return PC_SUCCESS;
}
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