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/******************************************************************
* DPUSER - The Next Generation
*
* File: libfits/fits_mem.cpp
* Purpose: Fits class methods for memory allocation
* Author: Thomas Ott
*
* Revision history
* ================
* 13.08.1999: file created
******************************************************************/
#include "fits.h"
/*
* Initialize all memory pointers
*/
void Fits::initializeMemory() {
int i;
FileName = (char *)calloc(257, sizeof(char));
columnName = (char *)calloc(73, sizeof(char));
dataptr = NULL;
setCasts();
n_elements = 0;
for (i = 0; i <= MAXNAXIS; i++) {
naxis[i] = 0;
}
bscale = 1.0;
bzero = 0.0;
// type = IMAGE;
// bitpix = 0;
filebits = membits = R4;
bytesPerPixel = 0;
bytesAllocated = 0;
extensionType = UNKNOWN;
}
/*!
Update all casts to memory
*/
void Fits::setCasts() {
// data = (float *)dataptr;
cdata = (dpCOMPLEX *)dataptr;
r8data = (double *)dataptr;
r4data = (float *)dataptr;
i1data = (unsigned char *)dataptr;
i2data = (short *)dataptr;
i4data = (int *)dataptr;
i8data = (long long *)dataptr;
}
/*!
(Re)allocate of memory and update the pointers to data.
*/
bool Fits::allocateMemory(dpint64 s) {
dpint64 memNecessary;
int i;
bytesPerPixel = abs(membits) / 8;
n_elements = 1;
// bitpix = membits;
for (i = 1; i <= naxis[0]; i++) n_elements *= naxis[i];
memNecessary = bytesPerPixel * n_elements;
if (s) {
memNecessary = s;
n_elements = s / bytesPerPixel;
}
// Paranoia, just to make sure we have no dangling NULL pointer
if (memNecessary == 0) memNecessary = 2 * sizeof(double);
if (bytesAllocated == memNecessary) return TRUE;
if ((dataptr = realloc(dataptr, memNecessary)) == NULL) {
initializeMemory();
if (memNecessary > 0)
return fits_error("Could not allocate enough memory");
else
return TRUE;
}
setCasts();
bytesAllocated = memNecessary;
return TRUE;
}
/*
* Change the type of data we are handling
*/
bool Fits::setType(FitsBitpix newbits, double nbscale, double nbzero) {
dpint64 i;
dpint64 n;
FitsBitpix oldbits = membits;
// return if nothing to be done
if (membits == newbits) return TRUE;
membits = newbits;
if (abs(oldbits) < abs(membits)) {
if (!allocateMemory()) return FALSE;
setCasts();
}
switch (newbits) {
case I1: switch (oldbits) {
case C16: for (n = 0; n < n_elements; n++) i1data[n] = (unsigned char)((cdata[n].r - nbzero) / nbscale); break;
case R8: for (n = 0; n < n_elements; n++) i1data[n] = (unsigned char)((r8data[n] - nbzero) / nbscale); break;
case R4: for (n = 0; n < n_elements; n++) i1data[n] = (unsigned char)(((double)r4data[n] - nbzero) / nbscale); break;
case I8: for (n = 0; n < n_elements; n++) i1data[n] = (unsigned char)(((double)i8data[n] * bscale + bzero - nbzero) / nbscale); break;
case I4: for (n = 0; n < n_elements; n++) i1data[n] = (unsigned char)(((double)i4data[n] * bscale + bzero - nbzero) / nbscale); break;
case I2: for (n = 0; n < n_elements; n++) i1data[n] = (unsigned char)(((double)i2data[n] * bscale + bzero - nbzero) / nbscale); break;
default: break;
}
bzero = nbzero;
bscale = nbscale;
break;
case I2: switch (oldbits) {
case C16: for (n = 0; n < n_elements; n++) i2data[n] = (short)((cdata[n].r - nbzero) / nbscale); break;
case R8: for (n = 0; n < n_elements; n++) i2data[n] = (short)((r8data[n] - nbzero) / nbscale); break;
case R4: for (n = 0; n < n_elements; n++) i2data[n] = (short)(((double)r4data[n] - nbzero) / nbscale); break;
case I8: for (n = 0; n < n_elements; n++) i2data[n] = (short)(((double)i8data[n] * bscale + bzero - nbzero) / nbscale); break;
case I4: for (n = 0; n < n_elements; n++) i2data[n] = (short)(((double)i4data[n] * bscale + bzero - nbzero) / nbscale); break;
case I1: for (i = n_elements - 1; i >= 0; i--) i2data[i] = (short)(((double)i1data[i] * bscale + bzero - nbzero) / nbscale); break;
default: break;
}
bzero = nbzero;
bscale = nbscale;
break;
case I4: switch (oldbits) {
case C16: for (n = 0; n < n_elements; n++) i4data[n] = (int)((cdata[n].r - nbzero) / nbscale); break;
case R8: for (n = 0; n < n_elements; n++) i4data[n] = (int)((r8data[n] - nbzero) / nbscale); break;
case R4: for (n = 0; n < n_elements; n++) i4data[n] = (int)(((double)r4data[n] - nbzero) / nbscale); break;
case I8: for (n = 0; n < n_elements; n++) i4data[n] = (int)(((double)i8data[n] * bscale + bzero - nbzero) / nbscale); break;
case I2: for (i = n_elements - 1; i >= 0; i--) i4data[i] = (int)(((double)i2data[i] * bscale + bzero - nbzero) / nbscale); break;
case I1: for (i = n_elements - 1; i >= 0; i--) i4data[i] = (int)(((double)i1data[i] * bscale + bzero - nbzero) / nbscale); break;
default: break;
}
bzero = nbzero;
bscale = nbscale;
break;
case I8: switch (oldbits) {
case C16: for (n = 0; n < n_elements; n++) i8data[n] = (long long)((cdata[n].r - nbzero) / nbscale); break;
case R8: for (n = 0; n < n_elements; n++) i8data[n] = (long long)((r8data[n] - nbzero) / nbscale); break;
case R4: for (i = n_elements - 1; i >= 0; i--) i8data[i] = (long long)(((double)r4data[i] - nbzero) / nbscale); break;
case I4: for (i = n_elements - 1; i >= 0; i--) i8data[i] = (long long)(((double)i4data[i] * bscale + bzero - nbzero) / nbscale); break;
case I2: for (i = n_elements - 1; i >= 0; i--) i8data[i] = (long long)(((double)i2data[i] * bscale + bzero - nbzero) / nbscale); break;
case I1: for (i = n_elements - 1; i >= 0; i--) i8data[i] = (long long)(((double)i1data[i] * bscale + bzero - nbzero) / nbscale); break;
default: break;
}
bzero = nbzero;
bscale = nbscale;
break;
case R4: switch (oldbits) {
case C16: for (n = 0; n < n_elements; n++) r4data[n] = (float)(cdata[n].r); break;
case R8: for (n = 0; n < n_elements; n++) r4data[n] = (float)r8data[n]; break;
case I8: for (n = 0; n < n_elements; n++) r4data[n] = (float)(i8data[n] * bscale + bzero); break;
case I4: for (n = 0; n < n_elements; n++) r4data[n] = (float)(i4data[n] * bscale + bzero); break;
case I2: for (i = n_elements - 1; i >= 0; i--) r4data[i] = (float)(i2data[i] * bscale + bzero); break;
case I1: for (i = n_elements - 1; i >= 0; i--) r4data[i] = (float)(i1data[i] * bscale + bzero); break;
default: break;
}
bzero = 0.0;
bscale = 1.0;
break;
case R8: switch (oldbits) {
case C16: for (n = 0; n < n_elements; n++) r8data[n] = cdata[n].r; break;
case R4: for (i = n_elements - 1; i >= 0; i--) r8data[i] = (double)r4data[i]; break;
case I8: for (n = 0; n < n_elements; n++) r8data[n] = (double)i8data[n] * bscale + bzero; break;
case I4: for (i = n_elements - 1; i >= 0; i--) r8data[i] = (double)i4data[i] * bscale + bzero; break;
case I2: for (i = n_elements - 1; i >= 0; i--) r8data[i] = (float)i2data[i] * bscale + bzero; break;
case I1: for (i = n_elements - 1; i >= 0; i--) r8data[i] = (float)i1data[i] * bscale + bzero; break;
default: break;
}
bzero = 0.0;
bscale = 1.0;
break;
case C16: switch (oldbits) {
case R8: for (i = n_elements - 1; i >= 0; i--) {
cdata[i].r = r8data[i];
cdata[i].i = 0.0;
}
break;
case R4: for (i = n_elements - 1; i >= 0; i--) {
cdata[i].r = (double)r4data[i];
cdata[i].i = 0.0;
}
break;
case I8: for (i = n_elements - 1; i >= 0; i--) {
cdata[i].r = (double)i8data[i] * bscale + bzero;
cdata[i].i = 0.0;
}
break;
case I4: for (i = n_elements - 1; i >= 0; i--) {
cdata[i].r = (double)i4data[i] * bscale + bzero;
cdata[i].i = 0.0;
}
break;
case I2: for (i = n_elements - 1; i >= 0; i--) {
cdata[i].r = (float)i2data[i] * bscale + bzero;
cdata[i].i = 0.0;
}
break;
case I1: for (i = n_elements - 1; i >= 0; i--) {
cdata[i].r = (float)i1data[i] * bscale + bzero;
cdata[i].i = 0.0;
}
break;
default: break;
}
bzero = 0.0;
bscale = 1.0;
break;
default: break;
}
if (abs(oldbits) > abs(membits)) {
if (!allocateMemory()) return FALSE;
setCasts();
}
return TRUE;
}
FitsBitpix Fits::getType() {
return membits;
}
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