void CL_PNGProvider_Generic::init()
{
//setting up PNGLIB stuff
png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr)
throw CL_Error ("CL_PNGProvider_Generic: png_create_read_struct() failed");
info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
png_destroy_read_struct(&png_ptr, (png_infopp) NULL, (png_infopp) NULL);
throw CL_Error ("CL_PNGProvider_Generic: png_create_info_struct() failed");
}
end_info = png_create_info_struct(png_ptr);
if (!end_info)
{
png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp) NULL);
cl_assert(false);
}
if (setjmp(png_ptr->jmpbuf))
{
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
cl_assert(false);
}
cl_assert(provider != NULL);
input_source = provider->open_source(filename);
cl_assert(input_source!=NULL);
// tell libpng form whom it get the fileData
png_set_read_fn(png_ptr, this, &CL_PNGProvider_Generic::pngread_file);
// reading the header infos and actually read data ...
read_data();
// remove our data_provider from libpng
png_set_read_fn(png_ptr,NULL,NULL);
// free memory ...
png_destroy_read_struct(&png_ptr, &info_ptr,&end_info);
delete input_source;
// this could be integrated better, but I'm too tired, so I just hack CL_PixelBuffer
// support into it. -- mbn 21. feb 2002
CL_PixelBuffer_Generic::format.enable_colorkey(uses_src_colorkey());
CL_PixelBuffer_Generic::format.set_colorkey(get_src_colorkey());
CL_PixelBuffer_Generic::pitch = get_pitch();
CL_PixelBuffer_Generic::width = get_width();
CL_PixelBuffer_Generic::height = get_height();
if (is_indexed()) CL_PixelBuffer_Generic::format.set_type(pixelformat_index);
}
void calc_algric_tree(algbric_node *root) {
if (root->flag == true)
return;
string table_name;
int blockNum, offset;
auto new_col_list = new vector<table_column *>, old_col_list = new_col_list, old_col_list2 = new_col_list;
// auto old_col_list = catm.exist_relation((root->left->table))->cols;
switch ( root->op ) {
case algbric_node::DIRECT :
root->flag = true;
return;
case algbric_node::PROJECTION :
{
if (!root->left->flag) calc_algric_tree(root->left);
old_col_list = catm.exist_relation((root->left->table))->cols;
for( auto x : *(root->projection_list) ) {
auto att = catm.exist_relation(x->relation_name)->get_column(x->attribute_name);
new_col_list->push_back(new table_column((root->left->op == algbric_node::DIRECT ? x->attribute_name.c_str() : x->full_name.c_str()), att->data_type, att->str_len, 0 ));
}
table_name = create_temp_table(new_col_list);
root->table = table_name;
auto cursor = RecordManager.getCursor(root->left->table, catm.calc_record_size(root->left->table));
while (cursor->next()) {
Record r = cursor->getRecord();
vector<record_value> result;
for(auto i = new_col_list->begin(); i != new_col_list->end(); i++) {
for(auto j = old_col_list->begin(); j != old_col_list->end(); j++ ) {
if ( (*i)->name == (*j)->name ) {
result.push_back(r.values[j-old_col_list->begin()]);
}
}
}
RecordManager.insertRecord(table_name, Record(result, new_col_list), blockNum, offset);
}
if (root->left->op != algbric_node::DIRECT) catm.drop_table(root->left->table);
root->flag = true;
return;
}
case algbric_node::SELECTION :
{
string left_name = root->left->table;
old_col_list = catm.exist_relation(left_name)->cols;
for( auto x : *(old_col_list) ) {
new_col_list->push_back( new table_column(x->name.c_str(), x->data_type, x->str_len, x->flag ));
}
table_name = create_temp_table(new_col_list);
root->table = table_name;
condition *p = NULL, *eq = NULL;
for(auto x : (root->conditions)) {
if ( catm.is_indexed(x->left_attr) ) {
p = x;
if (x->op == condition::EQUALTO)
eq = x;
}
}
if ( eq != NULL ) p = eq;
if ( p != NULL ) {
cout << "Index used: " << p->left_attr->full_name << endl;
int record_size = catm.calc_record_size(root->left->table);
auto t = p->left_attr;
indexIterator cursor;
int asdf = IndexManager.selectNode(cursor, t->relation_name + "/index_" + t->attribute_name + ".db",
p->op, (p->v).to_str(catm.get_data_type(t)));
if ( asdf == 0 ) {
int b = 0, c = 0;
while (cursor.next(b, c) == 0) {
Record a = RecordManager.getRecord(t->relation_name, b, c, record_size);
if (calc_conditions(&(root->conditions), a))
RecordManager.insertRecord(table_name, a, blockNum, offset);
}
}
} else {
string t = root->left->table;
int record_size = catm.calc_record_size(t);
indexIterator cursor;
int asdf = IndexManager.getStarter(cursor, t + "/index_" + catm.get_primary(t) + ".db");
if ( asdf == 0 ) {
int b = 0, c = 0;
while (cursor.next(b, c) == 0) {
Record a = RecordManager.getRecord(t, b, c, record_size);
if (calc_conditions(&(root->conditions), a))
RecordManager.insertRecord(table_name, a, blockNum, offset);
}
}
}
root->flag = true;
return;
}
case algbric_node::JOIN :
{
if (!root->left->flag) calc_algric_tree(root->left);
if (!root->right->flag) calc_algric_tree(root->right);
if ( catm.get_size(root->right->table) < catm.get_size(root->left->table) ) {
auto tmp = root->left;
root->left = root->right;
root->right = tmp;
}
old_col_list = catm.exist_relation((root->left->table))->cols;
old_col_list2= catm.exist_relation((root->right->table))->cols;
for( auto x : *old_col_list ) {
new_col_list->push_back(new table_column(x->name.c_str(), x->data_type, x->str_len, 0 ));
}
for( auto x : *old_col_list2 ) {
new_col_list->push_back(new table_column(x->name.c_str(), x->data_type, x->str_len, 0 ));
}
table_name = create_temp_table(new_col_list);
root->table = table_name;
auto outter_table = catm.exist_relation(root->left->table), inner_table = catm.exist_relation(root->right->table);
int outter_size = catm.calc_record_size(root->left->table), inner_size = catm.calc_record_size(root->right->table);
outter_table->get_size();
condition * p = NULL;
for ( auto x : root->conditions ) {
if ( outter_table->get_column(x->left_attr->full_name) != NULL && inner_table->get_column(x->right_attr->full_name) != NULL) {
} else if ( inner_table->get_column(x->left_attr->full_name) != NULL && outter_table->get_column(x->right_attr->full_name) != NULL) {
auto tmp = x->left_attr;
x->left_attr = x->right_attr;
x->right_attr = tmp;
}
assert( outter_table->get_column(x->left_attr->full_name) != NULL && inner_table->get_column(x->right_attr->full_name) != NULL);
if ( inner_table->is_indexed(x->right_attr->full_name) ) {
p = x;
}
}
auto cursor1 = RecordManager.getCursor(root->left->table, outter_size);
cout << "Index used: " << p->right_attr->full_name << endl;
while (cursor1->next()) {
Record r1 = cursor1->getRecord();
if ( p ) {
// nested-index join
indexIterator a;
int asdf = IndexManager.getStarter(a, root->right->table + "/index_" + p->right_attr->full_name + ".db");
if (asdf == 0) {
int b = 0, c = 0;
while (a.next(b, c) == 0) {
Record r2 = RecordManager.getRecord(root->right->table, b, c, inner_size);
if ( calc_conditions(&(root->conditions), r1, r2) ) {
vector<record_value> result(r1.values);
result.insert(result.end(), r2.values.begin(), r2.values.end());
RecordManager.insertRecord(table_name, Record(result, new_col_list), blockNum, offset);
}
}
}
} else {
// nested-loop join
auto cursor2 = RecordManager.getCursor(root->right->table, inner_size);
while (cursor2->next()) {
Record r2 = cursor2->getRecord();
if ( calc_conditions(&(root->conditions), r1, r2) ) {
vector<record_value> result(r1.values);
result.insert(result.end(), r2.values.begin(), r2.values.end());
RecordManager.insertRecord(table_name, Record(result, new_col_list), blockNum, offset);
}
}
delete cursor2;
}
}
delete cursor1;
if (root->right->op != algbric_node::DIRECT) catm.drop_table(root->right->table);
if (root->left->op != algbric_node::DIRECT) catm.drop_table(root->left->table);
root->flag = true;
return;
}
}
}
