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/* -------------------------------------------
Copyright (C) 2024-2025, Amlal El Mahrouss, licensed under the Apache 2.0 license.
File: FileReader.cc
Purpose: New Boot FileReader,
Read complete file and store it in a buffer.
------------------------------------------- */
#include <BootKit/BootKit.h>
#include <BootKit/Platform.h>
#include <BootKit/Protocol.h>
#include <FirmwareKit/EFI/API.h>
#include <FirmwareKit/Handover.h>
#include <modules/CoreGfx/TextGfx.h>
/// @file BootFileReader
/// @brief Bootloader File reader.
/// BUGS: 0
////////////////////////////////////////////////////////////////////////////////////////////////////
///
///
/// @name BootFileReader class
/// @brief Reads the file as a blob.
///
///
////////////////////////////////////////////////////////////////////////////////////////////////////
/***
@brief File Reader constructor.
*/
Boot::BootFileReader::BootFileReader(const CharacterTypeUTF16* path, EfiHandlePtr ImageHandle) {
if (path != nullptr) {
SizeT index = 0UL;
for (; path[index] != L'\0'; ++index) {
mPath[index] = path[index];
}
mPath[index] = 0;
}
/// Load protocols with their GUIDs.
EFI_GUID guidEfp = EFI_GUID(EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID);
EfiSimpleFilesystemProtocol* efp = nullptr;
EfiLoadImageProtocol* img = nullptr;
EFI_GUID guidImg = EFI_GUID(EFI_LOADED_IMAGE_PROTOCOL_GUID);
if (BS->HandleProtocol(ImageHandle, &guidImg, (void**) &img) != kEfiOk) {
mWriter.Write(L"BootZ: Handle-Protocol: No-Such-Protocol").Write(L"\r");
this->mErrorCode = kNotSupported;
}
if (BS->HandleProtocol(img->DeviceHandle, &guidEfp, (void**) &efp) != kEfiOk) {
mWriter.Write(L"BootZ: Handle-Protocol: No-Such-Protocol").Write(L"\r");
this->mErrorCode = kNotSupported;
return;
}
/// Start doing disk I/O
if (efp->OpenVolume(efp, &mRootFs) != kEfiOk) {
mWriter.Write(L"BootZ: Fetch-Protocol: No-Such-Volume").Write(L"\r");
this->mErrorCode = kNotSupported;
return;
}
EfiFileProtocol* fileFs = nullptr;
if (mRootFs->Open(mRootFs, &fileFs, mPath, kEFIFileRead, kEFIReadOnly) != kEfiOk) {
mWriter.Write(L"BootZ: Fetch-Protocol: No-Such-Path: ").Write(mPath).Write(L"\r");
this->mErrorCode = kNotSupported;
cg_render_string("BootZ: PLEASE RECOVER YOUR NEKERNEL INSTALL.", 40, 10, RGB(0xFF, 0xFF, 0xFF));
mRootFs->Close(mRootFs);
return;
}
mSizeFile = 0;
mFile = fileFs;
mErrorCode = kOperationOkay;
}
Boot::BootFileReader::~BootFileReader() {
if (this->mFile) {
this->mFile->Close(this->mFile);
this->mFile = nullptr;
}
if (this->mRootFs) {
this->mRootFs->Close(this->mRootFs);
this->mRootFs = nullptr;
}
if (this->mBlob) {
BS->FreePool(this->mBlob);
this->mBlob = nullptr;
}
BSetMem(this->mPath, 0, kPathLen);
}
/**
@brief Reads all of the file into a buffer.
@param **readUntil** size of file
@param **chunkToRead** chunk to read each time.
*/
Void Boot::BootFileReader::ReadAll(SizeT readUntil, SizeT chunkToRead, UIntPtr out_address) {
UInt32 szInfo = sizeof(EfiFileInfo);
EfiFileInfo newPtrInfo{};
EFI_GUID kFileInfoGUID = EFI_FILE_INFO_GUID;
if (mFile->GetInfo(mFile, &kFileInfoGUID, &szInfo, &newPtrInfo) == kEfiOk) {
readUntil = newPtrInfo.FileSize;
mWriter.Write(L"BootZ: File size: ").Write(readUntil).Write("\r");
}
if (readUntil == 0) {
mErrorCode = kNotSupported;
return;
}
if (mBlob == nullptr) {
if (!out_address) {
if (auto err = BS->AllocatePool(EfiLoaderCode, readUntil, (VoidPtr*) &mBlob) != kEfiOk) {
mWriter.Write(L"*** error: ").Write(err).Write(L" ***\r");
Boot::ThrowError(L"OutOfMemory", L"Out of memory.");
}
} else {
mBlob = (VoidPtr) out_address;
}
}
mWriter.Write(L"*** Bytes to read: ").Write(readUntil).Write(L" ***\r");
UInt64 bufSize = chunkToRead;
UInt64 szCnt = 0UL;
while (szCnt < readUntil) {
auto res = mFile->Read(mFile, &bufSize, (VoidPtr) (&((Char*) mBlob)[szCnt]));
szCnt += bufSize;
if (res == kBufferTooSmall) {
bufSize = chunkToRead;
}
}
mSizeFile = szCnt;
mErrorCode = kOperationOkay;
}
/// @brief error code getter.
/// @return the error code.
Int32& Boot::BootFileReader::Error() {
return mErrorCode;
}
/// @brief blob getter.
/// @return the blob.
VoidPtr Boot::BootFileReader::Blob() {
return mBlob;
}
/// @breif Size getter.
/// @return the size of the file.
UInt64& Boot::BootFileReader::Size() {
return mSizeFile;
}
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