audk/MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/UnicodeCollationEng.c

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/** @file
Driver to implement English version of Unicode Collation Protocol.
Copyright (c) 2006 - 2008, Intel Corporation. <BR>
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "UnicodeCollationEng.h"
CHAR8 mEngUpperMap[0x100];
CHAR8 mEngLowerMap[0x100];
CHAR8 mEngInfoMap[0x100];
CHAR8 mOtherChars[] = {
'0',
'1',
'2',
'3',
'4',
'5',
'6',
'7',
'8',
'9',
'\\',
'.',
'_',
'^',
'$',
'~',
'!',
'#',
'%',
'&',
'-',
'{',
'}',
'(',
')',
'@',
'`',
'\'',
'\0'
};
STATIC EFI_HANDLE mHandle = NULL;
//
// EFI Unicode Collation Protocol supporting ISO 639-2 language code
//
GLOBAL_REMOVE_IF_UNREFERENCED EFI_UNICODE_COLLATION_PROTOCOL UnicodeEng = {
EngStriColl,
EngMetaiMatch,
EngStrLwr,
EngStrUpr,
EngFatToStr,
EngStrToFat,
"eng"
};
//
// EFI Unicode Collation2 Protocol supporting RFC 3066 language code
//
GLOBAL_REMOVE_IF_UNREFERENCED EFI_UNICODE_COLLATION_PROTOCOL Unicode2Eng = {
EngStriColl,
EngMetaiMatch,
EngStrLwr,
EngStrUpr,
EngFatToStr,
EngStrToFat,
"en"
};
/**
The user Entry Point for English module.
This function initializes unicode character mapping and then installs Unicode
Collation & Unicode Collation 2 Protocols based on the feature flags.
@param ImageHandle The firmware allocated handle for the EFI image.
@param SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The entry point is executed successfully.
@retval other Some error occurs when executing this entry point.
**/
EFI_STATUS
EFIAPI
InitializeUnicodeCollationEng (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
UINTN Index;
UINTN Index2;
//
// Initialize mapping tables for the supported languages
//
for (Index = 0; Index < 0x100; Index++) {
mEngUpperMap[Index] = (CHAR8) Index;
mEngLowerMap[Index] = (CHAR8) Index;
mEngInfoMap[Index] = 0;
if ((Index >= 'a' && Index <= 'z') || (Index >= 0xe0 && Index <= 0xf6) || (Index >= 0xf8 && Index <= 0xfe)) {
Index2 = Index - 0x20;
mEngUpperMap[Index] = (CHAR8) Index2;
mEngLowerMap[Index2] = (CHAR8) Index;
mEngInfoMap[Index] |= CHAR_FAT_VALID;
mEngInfoMap[Index2] |= CHAR_FAT_VALID;
}
}
for (Index = 0; mOtherChars[Index] != 0; Index++) {
Index2 = mOtherChars[Index];
mEngInfoMap[Index2] |= CHAR_FAT_VALID;
}
if (FeaturePcdGet (PcdUnicodeCollation2Support)) {
if (FeaturePcdGet (PcdUnicodeCollationSupport)) {
Status = gBS->InstallMultipleProtocolInterfaces (
&mHandle,
&gEfiUnicodeCollationProtocolGuid,
&UnicodeEng,
&gEfiUnicodeCollation2ProtocolGuid,
&Unicode2Eng,
NULL
);
ASSERT_EFI_ERROR (Status);
} else {
Status = gBS->InstallMultipleProtocolInterfaces (
&mHandle,
&gEfiUnicodeCollation2ProtocolGuid,
&Unicode2Eng,
NULL
);
ASSERT_EFI_ERROR (Status);
}
} else {
if (FeaturePcdGet (PcdUnicodeCollationSupport)) {
Status = gBS->InstallMultipleProtocolInterfaces (
&mHandle,
&gEfiUnicodeCollationProtocolGuid,
&UnicodeEng,
NULL
);
ASSERT_EFI_ERROR (Status);
} else {
//
// This module must support to produce at least one of Unicode Collation Protocol
// and Unicode Collation 2 Protocol.
//
ASSERT (FALSE);
Status = EFI_UNSUPPORTED;
}
}
return Status;
}
/**
Performs a case-insensitive comparison of two Null-terminated Unicode
strings.
@param This Protocol instance pointer.
@param Str1 A pointer to a Null-terminated Unicode string.
@param Str2 A pointer to a Null-terminated Unicode string.
@retval 0 Str1 is equivalent to Str2
@retval > 0 Str1 is lexically greater than Str2
@retval < 0 Str1 is lexically less than Str2
**/
INTN
EFIAPI
EngStriColl (
IN EFI_UNICODE_COLLATION_PROTOCOL *This,
IN CHAR16 *Str1,
IN CHAR16 *Str2
)
{
while (*Str1 != 0) {
if (TO_UPPER (*Str1) != TO_UPPER (*Str2)) {
break;
}
Str1 += 1;
Str2 += 1;
}
return TO_UPPER (*Str1) - TO_UPPER (*Str2);
}
/**
Converts all the Unicode characters in a Null-terminated Unicode string to
lower case Unicode characters.
@param This Protocol instance pointer.
@param Str A pointer to a Null-terminated Unicode string.
**/
VOID
EFIAPI
EngStrLwr (
IN EFI_UNICODE_COLLATION_PROTOCOL *This,
IN OUT CHAR16 *Str
)
{
while (*Str != 0) {
*Str = TO_LOWER (*Str);
Str += 1;
}
}
/**
Converts all the Unicode characters in a Null-terminated Unicode string to upper
case Unicode characters.
@param This Protocol instance pointer.
@param Str A pointer to a Null-terminated Unicode string.
**/
VOID
EFIAPI
EngStrUpr (
IN EFI_UNICODE_COLLATION_PROTOCOL *This,
IN OUT CHAR16 *Str
)
{
while (*Str != 0) {
*Str = TO_UPPER (*Str);
Str += 1;
}
}
/**
Performs a case-insensitive comparison of a Null-terminated Unicode
pattern string and a Null-terminated Unicode string.
@param This Protocol instance pointer.
@param String A pointer to a Null-terminated Unicode string.
@param Pattern A pointer to a Null-terminated Unicode pattern string.
@retval TRUE Pattern was found in String.
@retval FALSE Pattern was not found in String.
**/
BOOLEAN
EFIAPI
EngMetaiMatch (
IN EFI_UNICODE_COLLATION_PROTOCOL *This,
IN CHAR16 *String,
IN CHAR16 *Pattern
)
{
CHAR16 CharC;
CHAR16 CharP;
CHAR16 Index3;
for (;;) {
CharP = *Pattern;
Pattern += 1;
switch (CharP) {
case 0:
//
// End of pattern. If end of string, TRUE match
//
if (*String != 0) {
return FALSE;
} else {
return TRUE;
}
case '*':
//
// Match zero or more chars
//
while (*String != 0) {
if (EngMetaiMatch (This, String, Pattern)) {
return TRUE;
}
String += 1;
}
return EngMetaiMatch (This, String, Pattern);
case '?':
//
// Match any one char
//
if (*String == 0) {
return FALSE;
}
String += 1;
break;
case '[':
//
// Match char set
//
CharC = *String;
if (CharC == 0) {
//
// syntax problem
//
return FALSE;
}
Index3 = 0;
CharP = *Pattern++;
while (CharP != 0) {
if (CharP == ']') {
return FALSE;
}
if (CharP == '-') {
//
// if range of chars, get high range
//
CharP = *Pattern;
if (CharP == 0 || CharP == ']') {
//
// syntax problem
//
return FALSE;
}
if (TO_UPPER (CharC) >= TO_UPPER (Index3) && TO_UPPER (CharC) <= TO_UPPER (CharP)) {
//
// if in range, it's a match
//
break;
}
}
Index3 = CharP;
if (TO_UPPER (CharC) == TO_UPPER (CharP)) {
//
// if char matches
//
break;
}
CharP = *Pattern++;
}
//
// skip to end of match char set
//
while ((CharP != 0) && (CharP != ']')) {
CharP = *Pattern;
Pattern += 1;
}
String += 1;
break;
default:
CharC = *String;
if (TO_UPPER (CharC) != TO_UPPER (CharP)) {
return FALSE;
}
String += 1;
break;
}
}
}
/**
Converts an 8.3 FAT file name in an OEM character set to a Null-terminated
Unicode string.
@param This Protocol instance pointer.
@param FatSize The size of the string Fat in bytes.
@param Fat A pointer to a Null-terminated string that contains an 8.3 file
name using an OEM character set.
@param String A pointer to a Null-terminated Unicode string. The string must
be preallocated to hold FatSize Unicode characters.
**/
VOID
EFIAPI
EngFatToStr (
IN EFI_UNICODE_COLLATION_PROTOCOL *This,
IN UINTN FatSize,
IN CHAR8 *Fat,
OUT CHAR16 *String
)
{
//
// No DBCS issues, just expand and add null terminate to end of string
//
while ((*Fat != 0) && (FatSize != 0)) {
*String = *Fat;
String += 1;
Fat += 1;
FatSize -= 1;
}
*String = 0;
}
/**
Converts a Null-terminated Unicode string to legal characters in a FAT
filename using an OEM character set.
@param This Protocol instance pointer.
@param String A pointer to a Null-terminated Unicode string. The string must
be preallocated to hold FatSize Unicode characters.
@param FatSize The size of the string Fat in bytes.
@param Fat A pointer to a Null-terminated string that contains an 8.3 file
name using an OEM character set.
@retval TRUE Fat is a Long File Name
@retval FALSE Fat is an 8.3 file name
**/
BOOLEAN
EFIAPI
EngStrToFat (
IN EFI_UNICODE_COLLATION_PROTOCOL *This,
IN CHAR16 *String,
IN UINTN FatSize,
OUT CHAR8 *Fat
)
{
BOOLEAN SpecialCharExist;
SpecialCharExist = FALSE;
while ((*String != 0) && (FatSize != 0)) {
//
// Skip '.' or ' ' when making a fat name
//
if (*String != '.' && *String != ' ') {
//
// If this is a valid fat char, move it.
// Otherwise, move a '_' and flag the fact that the name needs an Lfn
//
if (*String < 0x100 && ((mEngInfoMap[*String] & CHAR_FAT_VALID) != 0)) {
*Fat = mEngUpperMap[*String];
} else {
*Fat = '_';
SpecialCharExist = TRUE;
}
Fat += 1;
FatSize -= 1;
}
String += 1;
}
//
// Do not terminate that fat string
//
return SpecialCharExist;
}