long AsnBits::FindSizeConstraintBounds(int &iSCLowerBound, int &iSCUpperBound)const
{
int count = 0;
int numsizeconstraints;
const SizeConstraint* sizeConstraints = SizeConstraints(numsizeconstraints);
while(count < numsizeconstraints)
{
if((unsigned)iSCUpperBound < sizeConstraints[count].lowerBound)
{
iSCUpperBound = sizeConstraints[count].lowerBound;
}
if( sizeConstraints[count].upperBoundExists == 1 &&
(unsigned)iSCUpperBound < sizeConstraints[count].upperBound)
{
iSCUpperBound = sizeConstraints[count].upperBound;
}
if( (unsigned)iSCLowerBound > sizeConstraints[count].lowerBound )
{
iSCLowerBound = sizeConstraints[count].lowerBound;
}
count++;
}
return ( (iSCUpperBound - iSCLowerBound) + 1);
}
AsnLen AsnBits::EncodeWithSizeConstraint (AsnBufBits &b)const
{
AsnLen len = 0;
int numSizeConstraints;
const SizeConstraint* sizeConstraints = SizeConstraints(numSizeConstraints);
int iSCLowerBound = sizeConstraints[0].lowerBound;
int iSCUpperBound = iSCLowerBound;
int minBitsNeeded = 0;
int minBytesNeeded = 0;
long Range = FindSizeConstraintBounds(iSCLowerBound, iSCUpperBound);
long tempRange = Range - 1;
long size = bitLen;
unsigned char* temp = NULL;
long tempLength = 0;
unsigned char* pStr = new unsigned char[1];
while(tempRange > 0)
{
tempRange -= (long)(1 << minBitsNeeded);
minBitsNeeded += 1;
}
if(Range > 1)
{
if( (iSCUpperBound > 16) && b.IsAligned())
{
len += b.OctetAlignWrite();
}
if(size > iSCUpperBound)
{
size = iSCUpperBound;
}
if(size < iSCLowerBound)
{
size = iSCLowerBound;
}
minBytesNeeded = minBitsNeeded / 8;
minBitsNeeded = minBitsNeeded % 8;
size -= iSCLowerBound;
if(minBytesNeeded > 0)
{
pStr[0] = (unsigned char)(size >> minBitsNeeded);
len += b.PutBits(pStr, 8);
}
pStr[0] = (unsigned char)size;
pStr[0] <<= 8 - minBitsNeeded;
len += b.PutBits(pStr, minBitsNeeded);
}
SizeConstraints RotSizeConstraints(const SizeConstraints &sc, AXIS axis)
{
return axis == AXIS_X ? sc : SizeConstraints(sc.available_h, sc.available_w);
}
