mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-10 09:40:53 +01:00
436 lines
12 KiB
C++
436 lines
12 KiB
C++
/** @file
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Utility routines used by boot maintenance modules.
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Copyright (c) 2004 - 2009, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Platform.h> // Only use angled for Platform, else, xcode project won't compile
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#include <Efi.h>
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//#include "IO.h"
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/**
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Find the first instance of this Protocol
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in the system and return it's interface.
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@param ProtocolGuid Provides the protocol to search for
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@param Interface On return, a pointer to the first interface
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that matches ProtocolGuid
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@retval EFI_SUCCESS A protocol instance matching ProtocolGuid was found
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@retval EFI_NOT_FOUND No protocol instances were found that match ProtocolGuid
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**/
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EFI_STATUS
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EfiLibLocateProtocol (
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const EFI_GUID& ProtocolGuid,
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OUT void **Interface
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)
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{
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EFI_STATUS Status;
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Status = gBS->LocateProtocol (
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ProtocolGuid,
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NULL,
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(void **) Interface
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);
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return Status;
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}
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/**
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Function opens and returns a file handle to the root directory of a volume.
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@param DeviceHandle A handle for a device
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@return A valid file handle or NULL is returned
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**/
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EFI_FILE*
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EfiLibOpenRoot (
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IN EFI_HANDLE DeviceHandle
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)
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{
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EFI_STATUS Status;
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EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *Volume;
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EFI_FILE* File;
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File = NULL;
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//
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// File the file system interface to the device
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//
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Status = gBS->HandleProtocol (
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DeviceHandle,
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&gEfiSimpleFileSystemProtocolGuid,
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(void **) &Volume
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);
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//
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// Open the root directory of the volume
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//
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if (!EFI_ERROR(Status)) {
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Status = Volume->OpenVolume (
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Volume,
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&File
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);
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}
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//
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// Done
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//
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return EFI_ERROR(Status) ? NULL : File;
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}
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/**
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Function gets the file system information from an open file descriptor.
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@param FHand The file handle.
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@return A pointer to a buffer with file information.
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@retval NULL is returned if failed to get Volume Label Info.
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**/
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XStringW
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EfiLibFileSystemVolumeLabelInfo (
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const EFI_FILE* FHand
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)
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{
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EFI_STATUS Status;
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EFI_FILE_SYSTEM_VOLUME_LABEL *VolumeInfo = NULL;
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UINTN Size = 0;
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XStringW returnValue;
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Status = FHand->GetInfo(FHand, &gEfiFileSystemVolumeLabelInfoIdGuid, &Size, VolumeInfo);
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if (Status == EFI_BUFFER_TOO_SMALL) {
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// inc size by 2 because some drivers (HFSPlus.efi) do not count 0 at the end of file name
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Size += 2;
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VolumeInfo = (__typeof__(VolumeInfo))AllocateZeroPool(Size);
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Status = FHand->GetInfo (FHand, &gEfiFileSystemVolumeLabelInfoIdGuid, &Size, VolumeInfo);
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// Check to make sure this isn't actually EFI_FILE_SYSTEM_INFO
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if (!EFI_ERROR(Status))
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{
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EFI_FILE_SYSTEM_INFO *FSInfo = (EFI_FILE_SYSTEM_INFO *)VolumeInfo;
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returnValue.takeValueFrom(FSInfo->VolumeLabel);
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}
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FreePool(VolumeInfo);
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}
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return returnValue;
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}
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//Compare strings case insensitive
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// return 0 if strings are equal not accounting match case
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INTN
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StriCmp (
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IN CONST CHAR16 *FirstS,
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IN CONST CHAR16 *SecondS
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)
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{
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while (*FirstS != L'\0') {
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if ( (((*FirstS >= 'a') && (*FirstS <= 'z')) ? (*FirstS - ('a' - 'A')) : *FirstS ) !=
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(((*SecondS >= 'a') && (*SecondS <= 'z')) ? (*SecondS - ('a' - 'A')) : *SecondS ) ) return 1;
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FirstS++;
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SecondS++;
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}
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return *SecondS; //if all chars equal then compare sizes, last char in SecondS will be 0
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}
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// If Null-terminated strings are case insensitive equal or its sSize symbols are equal then true
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XBool
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AsciiStriNCmp(
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IN CONST CHAR8 *FirstS,
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IN CONST CHAR8 *SecondS,
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IN CONST UINTN sSize
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)
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{
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INTN i = sSize;
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while ( i && (*FirstS != '\0') ) {
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if ( (((*FirstS >= 'a') && (*FirstS <= 'z')) ? (*FirstS - ('a' - 'A')) : *FirstS ) !=
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(((*SecondS >= 'a') && (*SecondS <= 'z')) ? (*SecondS - ('a' - 'A')) : *SecondS ) ) return false;
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FirstS++;
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SecondS++;
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i--;
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}
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return true;
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}
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// Case insensitive search of WhatString in WhereString
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XBool
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AsciiStrStriN (
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IN CONST CHAR8 *WhatString,
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IN CONST UINTN sWhatSize,
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IN CONST CHAR8 *WhereString,
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IN CONST UINTN sWhereSize
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)
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{
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INTN i = sWhereSize;
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XBool Found = false;
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if (sWhatSize > sWhereSize) return false;
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for (; i && !Found; i--) {
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Found = AsciiStriNCmp(WhatString, WhereString, sWhatSize);
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WhereString++;
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}
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return Found;
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}
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/**
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Function gets the file information from an open file descriptor, and stores it
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in a buffer allocated from pool.
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@param FHand File Handle.
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@return A pointer to a buffer with file information or NULL is returned
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**/
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EFI_FILE_INFO *
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EfiLibFileInfo (
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const EFI_FILE* FHand
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)
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{
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EFI_STATUS Status;
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EFI_FILE_INFO *FileInfo = NULL;
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UINTN Size = 0;
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Status = FHand->GetInfo (FHand, &gEfiFileInfoGuid, &Size, FileInfo);
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if (Status == EFI_BUFFER_TOO_SMALL) {
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// inc size by 2 because some drivers (HFSPlus.efi) do not count 0 at the end of file name
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Size += 2;
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FileInfo = (__typeof__(FileInfo))AllocateZeroPool(Size);
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Status = FHand->GetInfo (FHand, &gEfiFileInfoGuid, &Size, FileInfo);
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}
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return EFI_ERROR(Status)?NULL:FileInfo;
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}
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EFI_FILE_SYSTEM_INFO *
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EfiLibFileSystemInfo (
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const EFI_FILE* FHand
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)
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{
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EFI_STATUS Status;
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EFI_FILE_SYSTEM_INFO *FileSystemInfo = NULL;
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UINTN Size = 0;
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Status = FHand->GetInfo (FHand, &gEfiFileSystemInfoGuid, &Size, FileSystemInfo);
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if (Status == EFI_BUFFER_TOO_SMALL) {
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// inc size by 2 because some drivers (HFSPlus.efi) do not count 0 at the end of file name
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Size += 2;
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FileSystemInfo = (__typeof__(FileSystemInfo))AllocateZeroPool(Size);
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Status = FHand->GetInfo (FHand, &gEfiFileSystemInfoGuid, &Size, FileSystemInfo);
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}
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return EFI_ERROR(Status)?NULL:FileSystemInfo;
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}
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/**
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Function is used to determine the number of device path instances
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that exist in a device path.
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@param DevicePath A pointer to a device path data structure.
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@return This function counts and returns the number of device path instances
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in DevicePath.
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**/
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UINTN
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EfiDevicePathInstanceCount (
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IN EFI_DEVICE_PATH_PROTOCOL *DevicePath
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)
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{
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UINTN Count;
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UINTN Size;
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Count = 0;
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while (GetNextDevicePathInstance (&DevicePath, &Size) != NULL) {
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Count += 1;
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}
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return Count;
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}
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/**
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Adjusts the size of a previously allocated buffer.
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@param OldPool - A pointer to the buffer whose size is being adjusted.
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@param OldSize - The size of the current buffer.
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@param NewSize - The size of the new buffer.
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@return The newly allocated buffer.
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@retval NULL Allocation failed.
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**/
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void *
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EfiReallocatePool (
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IN void *OldPool,
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IN UINTN OldSize,
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IN UINTN NewSize
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)
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{
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void *NewPool;
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NewPool = NULL;
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if (NewSize != 0) {
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NewPool = (__typeof__(NewPool))AllocateZeroPool(NewSize);
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}
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if (OldPool != NULL) {
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if (NewPool != NULL) {
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CopyMem(NewPool, OldPool, OldSize < NewSize ? OldSize : NewSize);
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}
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FreePool(OldPool);
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}
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return NewPool;
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}
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/**
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Compare two EFI_TIME data.
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@param FirstTime - A pointer to the first EFI_TIME data.
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@param SecondTime - A pointer to the second EFI_TIME data.
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@retval true The FirstTime is not later than the SecondTime.
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@retval false The FirstTime is later than the SecondTime.
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**/
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XBool
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TimeCompare (
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IN EFI_TIME *FirstTime,
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IN EFI_TIME *SecondTime
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)
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{
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if (FirstTime->Year != SecondTime->Year) {
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return (FirstTime->Year < SecondTime->Year);
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} else if (FirstTime->Month != SecondTime->Month) {
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return (FirstTime->Month < SecondTime->Month);
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} else if (FirstTime->Day != SecondTime->Day) {
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return (FirstTime->Day < SecondTime->Day);
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} else if (FirstTime->Hour != SecondTime->Hour) {
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return (FirstTime->Hour < SecondTime->Hour);
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} else if (FirstTime->Minute != SecondTime->Minute) {
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return (FirstTime->Minute < SecondTime->Minute);
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} else if (FirstTime->Second != SecondTime->Second) {
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return (FirstTime->Second < SecondTime->Second);
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}
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return (FirstTime->Nanosecond <= SecondTime->Nanosecond);
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}
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/*
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Translate VT-UTF8 characters into one Unicode character.
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UTF8 Encoding Table
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Bits per Character | Unicode Character Range | Unicode Binary Encoding | UTF8 Binary Encoding
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0-7 | 0x0000 - 0x007F | 00000000 0xxxxxxx | 0xxxxxxx
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8-11 | 0x0080 - 0x07FF | 00000xxx xxxxxxxx | 110xxxxx 10xxxxxx
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12-16 | 0x0800 - 0xFFFF | xxxxxxxx xxxxxxxx | 1110xxxx 10xxxxxx 10xxxxxx
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$ U+0024 10 0100 00100100 24
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¢ U+00A2 1010 0010 11000010 10100010 C2 A2
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€ U+20AC 0010 0000 1010 1100 11100010 10000010 10101100 E2 82 AC
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𐍈 U+10348 1 0000 0011 0100 1000 11110000 10010000 10001101 10001000 F0 90 8D 88
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*/
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CHAR8* GetUnicodeChar(CHAR8 *s, CHAR16* UnicodeChar)
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{
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INT8 ValidBytes = 0;
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UINT8 Byte0, Byte1, Byte2;
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UINT8 UnicodeByte0, UnicodeByte1;
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CHAR16 A = L'\0';
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if (*s == '&') {
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if (AsciiStrStr(s, "&#x") !=0 ) {
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s += 3;
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while (IS_HEX(*s) || IS_DIGIT(*s)) {
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A <<= 4;
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if (IS_DIGIT(*s)) {
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A += *s - 0x30;
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} else if (IS_UPPER(*s)) {
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A += *s - 0x41 + 10;
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} else {
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A += *s - 0x61 + 10;
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}
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s++;
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}
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} else if (AsciiStrStr(s, "&") !=0 ) {
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A = 0x26; //&
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s += 5;
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} else if (AsciiStrStr(s, """) !=0 ) {
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A = 0x22; //"
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s += 6;
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} else if (AsciiStrStr(s, "<") !=0 ) {
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A = 0x3C; //<
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s += 4;
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} else if (AsciiStrStr(s, ">") !=0 ) {
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A = 0x3E; //>
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s += 4;
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} else if (AsciiStrStr(s, " ") !=0 ) {
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A = 0xA0; //>
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s += 6;
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}
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*UnicodeChar = A;
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} else {
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if ((*s & 0x80) == 0) {
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ValidBytes = 1;
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} else if ((*s & 0xe0) == 0xc0) {
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ValidBytes = 2;
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} else if ((*s & 0xf0) == 0xe0) {
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ValidBytes = 3;
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}
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switch (ValidBytes) {
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case 1:
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//
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// one-byte utf8 code
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//
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*UnicodeChar = (UINT16) (*s++);
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break;
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case 2:
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//
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// two-byte utf8 code
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//
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Byte1 = *s++; //c2
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Byte0 = *s++; //a2
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UnicodeByte0 = (UINT8) ((Byte1 << 6) | (Byte0 & 0x3f));
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UnicodeByte1 = (UINT8) ((Byte1 >> 2) & 0x07);
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*UnicodeChar = (UINT16) (UnicodeByte0 | (UnicodeByte1 << 8));
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break;
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case 3:
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//
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// three-byte utf8 code
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// sample E3 90 A1 = 0x3421
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//
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Byte2 = *s++;
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Byte1 = *s++;
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Byte0 = *s++;
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UnicodeByte0 = (UINT8) ((Byte1 << 6) | (Byte0 & 0x3f));
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UnicodeByte1 = (UINT8) ((Byte2 << 4) | ((Byte1 >> 2) & 0x0f));
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*UnicodeChar = (UINT16) (UnicodeByte0 | (UnicodeByte1 << 8));
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default:
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break;
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}
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}
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return s;
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}
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