bool ON_CompressedBuffer::WriteChar(
size_t count, const void* buffer
)
{
bool rc = true;
if ( count > 0 && buffer )
{
if ( count + m_sizeof_compressed > m_buffer_compressed_capacity )
{
size_t delta = count + m_sizeof_compressed - m_buffer_compressed_capacity;
if ( delta < 2048 )
delta = 2048;
if ( delta < m_buffer_compressed_capacity/4 )
delta = m_buffer_compressed_capacity/4;
m_buffer_compressed_capacity += delta;
m_buffer_compressed = onrealloc(m_buffer_compressed,m_buffer_compressed_capacity);
if ( !m_buffer_compressed )
{
m_buffer_compressed_capacity = 0;
m_sizeof_compressed = 0;
return false;
}
}
memcpy(((char*)m_buffer_compressed)+m_sizeof_compressed,buffer,count);
m_sizeof_compressed += count;
}
else
{
rc = (0 == count);
}
return rc;
}
void ON_String::ReserveArray( size_t array_capacity )
{
ON_aStringHeader* p = Header();
const int capacity = (int) array_capacity;
if ( p == pEmptyStringHeader )
{
CreateArray(capacity);
}
else if ( p->ref_count > 1 )
{
CreateArray(capacity);
ON_aStringHeader* p1 = Header();
const int size = (capacity < p->string_length) ? capacity : p->string_length;
if ( size > 0 )
{
memcpy( p1->string_array(), p->string_array(), size*sizeof(*m_s) );
p1->string_length = size;
}
}
else if ( capacity > p->string_capacity )
{
p = (ON_aStringHeader*)onrealloc( p, sizeof(ON_aStringHeader) + (capacity+1)*sizeof(*m_s) );
m_s = p->string_array();
memset( &m_s[p->string_capacity], 0, (1+capacity-p->string_capacity)*sizeof(*m_s) );
p->string_capacity = capacity;
}
}
bool ON_BezierCage::Create( int dim, bool is_rat, int order0, int order1, int order2 )
{
if ( m_cv_capacity < 1 )
m_cv = 0;
m_dim = (dim>0) ? dim : 0;
m_is_rat = is_rat ? 1 : 0;
m_order[0] = (order0 >= 2) ? order0 : 0;
m_order[1] = (order1 >= 2) ? order1 : 0;
m_order[2] = (order2 >= 2) ? order2 : 0;
m_cv_stride[2] = (m_dim > 0) ? m_dim+m_is_rat : 0;
m_cv_stride[1] = m_cv_stride[2]*m_order[2];
m_cv_stride[0] = m_cv_stride[1]*m_order[1];
m_cv_capacity = m_cv_stride[0]*m_order[0];
m_cv = (double*)onrealloc( m_cv, m_cv_capacity*sizeof(m_cv[0]) );
return IsValid() ? true : false;
}
bool ON_MeshNgonList::ReserveNgonCapacity(int capacity)
{
bool rc = true;
if ( capacity > m_ngons_capacity )
{
m_ngons = (ON_MeshNgon*)onrealloc(m_ngons,capacity*sizeof(m_ngons[0]));
if ( 0 == m_ngons )
{
m_ngons_capacity = 0;
m_ngons_count = 0;
rc = false;
}
else
{
m_ngons_capacity = capacity;
}
}
return rc;
}
/////////////////////////////////////////////////////////////////
// Tools for managing CV and knot memory
bool ON_BezierCage::ReserveCVCapacity(
int capacity// number of doubles to reserve
)
{
if ( m_cv_capacity < capacity ) {
if ( m_cv ) {
if ( m_cv_capacity ) {
m_cv = (double*)onrealloc( m_cv, capacity*sizeof(*m_cv) );
m_cv_capacity = (m_cv) ? capacity : 0;
}
// else user supplied m_cv[] array
}
else {
m_cv = (double*)onmalloc( capacity*sizeof(*m_cv) );
m_cv_capacity = (m_cv) ? capacity : 0;
}
}
return ( m_cv ) ? true : false;
}
void ON_String::ShrinkArray()
{
ON_aStringHeader* p = Header();
if ( p != pEmptyStringHeader ) {
if ( p->string_length < 1 ) {
Destroy();
}
else if ( p->ref_count > 1 ) {
// shared string
CreateArray(p->string_length);
ON_aStringHeader* p1 = Header();
memcpy( m_s, p->string_array(), p->string_length*sizeof(*m_s));
p1->string_length = p->string_length;
m_s[p1->string_length] = 0;
}
else if ( p->string_length < p->string_capacity ) {
// onrealloc string
p = (ON_aStringHeader*)onrealloc( p, sizeof(ON_aStringHeader) + (p->string_length+1)*sizeof(*m_s) );
p->string_capacity = p->string_length;
m_s = p->string_array();
m_s[p->string_length] = 0;
}
}
}
void* ON_Workspace::GrowMemory( void* p, size_t size )
{
void* newp = NULL;
if ( !p ) {
newp = GetMemory(size);
}
else {
struct ON_Workspace_MBLK* pBlk = m_pMemBlk;
while ( pBlk ) {
if ( pBlk->pMem == p ) {
if ( size > 0 ) {
newp = onrealloc(p,size);
}
else {
newp = p;
}
pBlk->pMem = newp;
break;
}
pBlk = pBlk->pNext;
}
}
return newp;
}
bool ON_CompressedBuffer::Compress(
size_t sizeof__inbuffer, // sizeof uncompressed input data
const void* inbuffer, // uncompressed input data
int sizeof_element
)
{
Destroy();
//size_t compressed_size = 0;
bool rc = false;
if ( sizeof__inbuffer > 0 && 0 == inbuffer )
return false;
if ( 0 == sizeof__inbuffer )
return true;
// number of bytes of uncompressed data
m_sizeof_uncompressed = sizeof__inbuffer;
ON_CompressedBufferHelper helper;
memset(&helper,0,sizeof(helper));
helper.action = 1;
bool bToggleByteOrder = false;
switch(sizeof_element)
{
case 2:
case 4:
case 8:
if ( 0 == (sizeof__inbuffer%sizeof_element) )
{
m_sizeof_element = sizeof_element;
bToggleByteOrder = (ON::big_endian == ON::Endian());
}
break;
};
if ( bToggleByteOrder )
{
ON_BinaryFile::ToggleByteOrder(
(int)(sizeof__inbuffer/m_sizeof_element),
m_sizeof_element,
inbuffer,
(void*)inbuffer
);
}
m_method = (sizeof__inbuffer > 128) ? 1 : 0;
if ( m_method )
{
if ( !CompressionInit(&helper) )
{
CompressionEnd(&helper);
m_method = 0;
}
else
{
m_buffer_compressed = onmalloc(sizeof__inbuffer/4);
size_t sizeof_compressed = DeflateHelper( &helper, sizeof__inbuffer, inbuffer );
CompressionEnd(&helper);
if ( sizeof_compressed > 0 && sizeof_compressed == m_sizeof_compressed )
{
rc = true;
if ( 2*m_buffer_compressed_capacity > 3*m_sizeof_compressed )
{
// release memory we don't need
m_buffer_compressed_capacity = m_sizeof_compressed;
m_buffer_compressed = onrealloc(m_buffer_compressed,m_buffer_compressed_capacity);
}
}
else
{
Destroy();
m_method = 0;
}
}
}
if ( 0 == m_method )
{
// uncompressed
m_buffer_compressed = onmalloc(sizeof__inbuffer);
if ( m_buffer_compressed )
{
m_sizeof_compressed = sizeof__inbuffer;
m_buffer_compressed_capacity = sizeof__inbuffer;
memcpy(m_buffer_compressed,inbuffer,sizeof__inbuffer);
rc = true;
}
}
if ( bToggleByteOrder )
{
ON_BinaryFile::ToggleByteOrder(
(int)(sizeof__inbuffer/m_sizeof_element),
m_sizeof_element,
inbuffer,
(void*)inbuffer
);
}
if (rc)
{
m_crc_uncompressed = ON_CRC32( 0, sizeof__inbuffer, inbuffer );
m_crc_compressed = ON_CRC32( 0, m_sizeof_compressed, m_buffer_compressed );
}
return rc;
}
BOOL ON_UnknownUserData::Read( ON_BinaryArchive& file )
{
m_buffer = onrealloc( m_buffer, m_sizeof_buffer );
m_3dm_version = file.Archive3dmVersion();
return file.ReadByte(m_sizeof_buffer,m_buffer);
}
