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fiddling around with far pointers, page headers somewhat solid

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MitchellHansen
2017-06-30 01:13:08 -07:00
parent 3596c9094c
commit 1fab4943bf
2 changed files with 59 additions and 11 deletions
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42
src/map/Octree.cpp
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@@ -271,16 +271,46 @@ std::tuple<uint64_t, uint64_t> Octree::GenerationRecursion(char* data, sf::Vecto
// We are working bottom up so we need to subtract from the stack position
// the amount of elements we want to use
for (auto desc_pos: descriptor_position_array) {
}
if (stack_pos - descriptor_array.size() > stack_pos) {
global_pos = stack_pos;
int worst_case_insertion_size = descriptor_position_array.size() * 2;
// check to see if we exceeded this page header, if so set the header and move the global position
if (page_header_counter - worst_case_insertion_size <= 0) {
// Jump to the page headers position and reset the counter
descriptor_buffer_position -= 0x8000 - page_header_counter;
page_header_counter = 0x8000;
// Fill the space with blank
memcpy(&descriptor_buffer[descriptor_buffer_position], &current_info_section_position, sizeof(uint64_t));
descriptor_buffer_position--;
}
// We gotta go backwards as memcpy of a vector can be emulated by starting from the rear
for (int i = descriptor_position_array.size() - 1; i >= 0; i--) {
uint64_t relative_distance = std::get<1>(descriptor_position_array.at(i)) - descriptor_buffer_position;
// check to see if the
if (relative_distance > 0x8000) {
memcpy(&descriptor_buffer[descriptor_buffer_position], &std::get<1>(descriptor_position_array.at(i)), sizeof(uint64_t));
descriptor_buffer_position--;
}
memcpy(&descriptor_buffer[descriptor_buffer_position], descriptor_position_array.at(i), descriptor_array.size() * sizeof(uint64_t));
}
if (stack_pos - descriptor_position_array.size() > stack_pos) {
global_pos -= stack_pos;
stack_pos = 0x8000;
}
else {
stack_pos -= descriptor_array.size();
stack_pos -= descriptor_position_array.size();
}