87 lines
2.9 KiB
C++
87 lines
2.9 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2021 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#include "xenia/kernel/xenumerator.h"
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namespace xe {
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namespace kernel {
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XEnumerator::XEnumerator(KernelState* kernel_state, size_t items_per_enumerate,
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size_t item_size)
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: XObject(kernel_state, kObjectType),
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items_per_enumerate_(items_per_enumerate),
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item_size_(item_size) {}
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XEnumerator::~XEnumerator() = default;
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X_STATUS XEnumerator::Initialize(uint32_t user_index, uint32_t app_id,
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uint32_t message, uint32_t message2,
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uint32_t flags, uint32_t extra_size,
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void** extra_buffer) {
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auto native_object = CreateNative(sizeof(X_KENUMERATOR) + extra_size);
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if (!native_object) {
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return X_STATUS_NO_MEMORY;
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}
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auto guest_object = reinterpret_cast<X_KENUMERATOR*>(native_object);
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guest_object->app_id = app_id;
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guest_object->message = message;
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guest_object->message2 = message2;
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guest_object->user_index = user_index;
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guest_object->items_per_enumerate =
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static_cast<uint32_t>(items_per_enumerate_);
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guest_object->flags = flags;
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if (extra_buffer) {
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*extra_buffer =
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!extra_buffer ? nullptr : &native_object[sizeof(X_KENUMERATOR)];
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}
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return X_STATUS_SUCCESS;
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}
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X_STATUS XEnumerator::Initialize(uint32_t user_index, uint32_t app_id,
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uint32_t message, uint32_t message2,
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uint32_t flags) {
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return Initialize(user_index, app_id, message, message2, flags, 0, nullptr);
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}
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uint8_t* XStaticEnumerator::AppendItem() {
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buffer_.resize(++item_count_ * item_size());
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auto ptr =
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const_cast<uint8_t*>(buffer_.data() + (item_count_ - 1) * item_size());
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return ptr;
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}
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uint32_t XStaticEnumerator::WriteItems(uint32_t buffer_ptr,
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uint8_t* buffer_data,
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uint32_t buffer_size,
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uint32_t* written_count) {
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size_t count = std::min(item_count_ - current_item_, items_per_enumerate());
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if (!count) {
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return X_ERROR_NO_MORE_FILES;
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}
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size_t size = count * item_size();
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if (size > buffer_size) {
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return X_ERROR_INSUFFICIENT_BUFFER;
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}
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size_t offset = current_item_ * item_size();
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std::memcpy(buffer_data, buffer_.data() + offset, size);
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current_item_ += count;
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if (written_count) {
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*written_count = static_cast<uint32_t>(count);
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}
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return X_ERROR_SUCCESS;
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}
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} // namespace kernel
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} // namespace xe
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