diff options
Diffstat (limited to 'MdeModulePkg/Library/ExtendedIfrSupportLib/R8Lib.c')
| -rw-r--r-- | MdeModulePkg/Library/ExtendedIfrSupportLib/R8Lib.c | 482 |
1 files changed, 241 insertions, 241 deletions
diff --git a/MdeModulePkg/Library/ExtendedIfrSupportLib/R8Lib.c b/MdeModulePkg/Library/ExtendedIfrSupportLib/R8Lib.c index c7e82a2..4cd0320 100644 --- a/MdeModulePkg/Library/ExtendedIfrSupportLib/R8Lib.c +++ b/MdeModulePkg/Library/ExtendedIfrSupportLib/R8Lib.c @@ -1,241 +1,241 @@ -/**@file - Copyright (c) 2007, Intel Corporation - - 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 "LibraryInternal.h" - - -CHAR16 -InternalNibbleToHexChar ( - IN UINT8 Nibble - ) -/*++ - - Routine Description: - Converts the low nibble of a byte to hex unicode character. - - Arguments: - Nibble - lower nibble of a byte. - - Returns: - Hex unicode character. - ---*/ -{ - Nibble &= 0x0F; - if (Nibble <= 0x9) { - return (CHAR16)(Nibble + L'0'); - } - - return (CHAR16)(Nibble - 0xA + L'A'); -} - - -/** - Converts binary buffer to Unicode string. - At a minimum, any blob of data could be represented as a hex string. - - @param Str Pointer to the string. - @param HexStringBufferLength Length in bytes of buffer to hold the hex string. - Includes tailing '\0' character. If routine return - with EFI_SUCCESS, containing length of hex string - buffer. If routine return with - EFI_BUFFER_TOO_SMALL, containg length of hex - string buffer desired. - @param Buf Buffer to be converted from. - @param Len Length in bytes of the buffer to be converted. - - @retval EFI_SUCCESS Routine success. - @retval EFI_BUFFER_TOO_SMALL The hex string buffer is too small. - -**/ -EFI_STATUS -R8_BufToHexString ( - IN OUT CHAR16 *Str, - IN OUT UINTN *HexStringBufferLength, - IN UINT8 *Buf, - IN UINTN Len - ) -{ - // - // Porting Guide: - // This library interface is simply obsolete. - // Include the source code to user code. - // - UINTN Idx; - UINT8 Byte; - UINTN StrLen; - - // - // Make sure string is either passed or allocate enough. - // It takes 2 Unicode characters (4 bytes) to represent 1 byte of the binary buffer. - // Plus the Unicode termination character. - // - StrLen = Len * 2; - if (StrLen > ((*HexStringBufferLength) - 1)) { - *HexStringBufferLength = StrLen + 1; - return EFI_BUFFER_TOO_SMALL; - } - - *HexStringBufferLength = StrLen + 1; - // - // Ends the string. - // - Str[StrLen] = L'\0'; - - for (Idx = 0; Idx < Len; Idx++) { - - Byte = Buf[Idx]; - Str[StrLen - 1 - Idx * 2] = InternalNibbleToHexChar (Byte); - Str[StrLen - 2 - Idx * 2] = InternalNibbleToHexChar ((UINT8)(Byte >> 4)); - } - - return EFI_SUCCESS; -} - - - - -/** - Converts Unicode string to binary buffer. - The conversion may be partial. - The first character in the string that is not hex digit stops the conversion. - At a minimum, any blob of data could be represented as a hex string. - - @param Buf Pointer to buffer that receives the data. - @param Len Length in bytes of the buffer to hold converted - data. If routine return with EFI_SUCCESS, - containing length of converted data. If routine - return with EFI_BUFFER_TOO_SMALL, containg length - of buffer desired. - @param Str String to be converted from. - @param ConvertedStrLen Length of the Hex String consumed. - - @retval EFI_SUCCESS Routine Success. - @retval EFI_BUFFER_TOO_SMALL The buffer is too small to hold converted data. - -**/ -EFI_STATUS -R8_HexStringToBuf ( - IN OUT UINT8 *Buf, - IN OUT UINTN *Len, - IN CHAR16 *Str, - OUT UINTN *ConvertedStrLen OPTIONAL - ) -{ - // - // Porting Guide: - // This library interface is simply obsolete. - // Include the source code to user code. - // - - UINTN HexCnt; - UINTN Idx; - UINTN BufferLength; - UINT8 Digit; - UINT8 Byte; - - // - // Find out how many hex characters the string has. - // - for (Idx = 0, HexCnt = 0; R8_IsHexDigit (&Digit, Str[Idx]); Idx++, HexCnt++); - - if (HexCnt == 0) { - *Len = 0; - return EFI_SUCCESS; - } - // - // Two Unicode characters make up 1 buffer byte. Round up. - // - BufferLength = (HexCnt + 1) / 2; - - // - // Test if buffer is passed enough. - // - if (BufferLength > (*Len)) { - *Len = BufferLength; - return EFI_BUFFER_TOO_SMALL; - } - - *Len = BufferLength; - - for (Idx = 0; Idx < HexCnt; Idx++) { - - R8_IsHexDigit (&Digit, Str[HexCnt - 1 - Idx]); - - // - // For odd charaters, write the lower nibble for each buffer byte, - // and for even characters, the upper nibble. - // - if ((Idx & 1) == 0) { - Byte = Digit; - } else { - Byte = Buf[Idx / 2]; - Byte &= 0x0F; - Byte = (UINT8) (Byte | Digit << 4); - } - - Buf[Idx / 2] = Byte; - } - - if (ConvertedStrLen != NULL) { - *ConvertedStrLen = HexCnt; - } - - return EFI_SUCCESS; -} - - -/** - Determines if a Unicode character is a hexadecimal digit. - The test is case insensitive. - - @param Digit Pointer to byte that receives the value of the hex - character. - @param Char Unicode character to test. - - @retval TRUE If the character is a hexadecimal digit. - @retval FALSE Otherwise. - -**/ -BOOLEAN -R8_IsHexDigit ( - OUT UINT8 *Digit, - IN CHAR16 Char - ) -{ - // - // Porting Guide: - // This library interface is simply obsolete. - // Include the source code to user code. - // - - if ((Char >= L'0') && (Char <= L'9')) { - *Digit = (UINT8) (Char - L'0'); - return TRUE; - } - - if ((Char >= L'A') && (Char <= L'F')) { - *Digit = (UINT8) (Char - L'A' + 0x0A); - return TRUE; - } - - if ((Char >= L'a') && (Char <= L'f')) { - *Digit = (UINT8) (Char - L'a' + 0x0A); - return TRUE; - } - - return FALSE; -} - - +/** @file
+ <Todo: Add file description>
+
+Copyright (c) 2007 - 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 "LibraryInternal.h"
+
+
+CHAR16
+InternalNibbleToHexChar (
+ IN UINT8 Nibble
+ )
+/*++
+
+ Routine Description:
+ Converts the low nibble of a byte to hex unicode character.
+
+ Arguments:
+ Nibble - lower nibble of a byte.
+
+ Returns:
+ Hex unicode character.
+
+--*/
+{
+ Nibble &= 0x0F;
+ if (Nibble <= 0x9) {
+ return (CHAR16)(Nibble + L'0');
+ }
+
+ return (CHAR16)(Nibble - 0xA + L'A');
+}
+
+
+/**
+ Converts binary buffer to Unicode string.
+ At a minimum, any blob of data could be represented as a hex string.
+
+ @param Str Pointer to the string.
+ @param HexStringBufferLength Length in bytes of buffer to hold the hex string.
+ Includes tailing '\0' character. If routine return
+ with EFI_SUCCESS, containing length of hex string
+ buffer. If routine return with
+ EFI_BUFFER_TOO_SMALL, containg length of hex
+ string buffer desired.
+ @param Buf Buffer to be converted from.
+ @param Len Length in bytes of the buffer to be converted.
+
+ @retval EFI_SUCCESS Routine success.
+ @retval EFI_BUFFER_TOO_SMALL The hex string buffer is too small.
+
+**/
+EFI_STATUS
+R8_BufToHexString (
+ IN OUT CHAR16 *Str,
+ IN OUT UINTN *HexStringBufferLength,
+ IN UINT8 *Buf,
+ IN UINTN Len
+ )
+{
+ //
+ // Porting Guide:
+ // This library interface is simply obsolete.
+ // Include the source code to user code.
+ //
+ UINTN Idx;
+ UINT8 Byte;
+ UINTN StrLen;
+
+ //
+ // Make sure string is either passed or allocate enough.
+ // It takes 2 Unicode characters (4 bytes) to represent 1 byte of the binary buffer.
+ // Plus the Unicode termination character.
+ //
+ StrLen = Len * 2;
+ if (StrLen > ((*HexStringBufferLength) - 1)) {
+ *HexStringBufferLength = StrLen + 1;
+ return EFI_BUFFER_TOO_SMALL;
+ }
+
+ *HexStringBufferLength = StrLen + 1;
+ //
+ // Ends the string.
+ //
+ Str[StrLen] = L'\0';
+
+ for (Idx = 0; Idx < Len; Idx++) {
+
+ Byte = Buf[Idx];
+ Str[StrLen - 1 - Idx * 2] = InternalNibbleToHexChar (Byte);
+ Str[StrLen - 2 - Idx * 2] = InternalNibbleToHexChar ((UINT8)(Byte >> 4));
+ }
+
+ return EFI_SUCCESS;
+}
+
+
+
+
+/**
+ Converts Unicode string to binary buffer.
+ The conversion may be partial.
+ The first character in the string that is not hex digit stops the conversion.
+ At a minimum, any blob of data could be represented as a hex string.
+
+ @param Buf Pointer to buffer that receives the data.
+ @param Len Length in bytes of the buffer to hold converted
+ data. If routine return with EFI_SUCCESS,
+ containing length of converted data. If routine
+ return with EFI_BUFFER_TOO_SMALL, containg length
+ of buffer desired.
+ @param Str String to be converted from.
+ @param ConvertedStrLen Length of the Hex String consumed.
+
+ @retval EFI_SUCCESS Routine Success.
+ @retval EFI_BUFFER_TOO_SMALL The buffer is too small to hold converted data.
+
+**/
+EFI_STATUS
+R8_HexStringToBuf (
+ IN OUT UINT8 *Buf,
+ IN OUT UINTN *Len,
+ IN CHAR16 *Str,
+ OUT UINTN *ConvertedStrLen OPTIONAL
+ )
+{
+ //
+ // Porting Guide:
+ // This library interface is simply obsolete.
+ // Include the source code to user code.
+ //
+
+ UINTN HexCnt;
+ UINTN Idx;
+ UINTN BufferLength;
+ UINT8 Digit;
+ UINT8 Byte;
+
+ //
+ // Find out how many hex characters the string has.
+ //
+ for (Idx = 0, HexCnt = 0; R8_IsHexDigit (&Digit, Str[Idx]); Idx++, HexCnt++);
+
+ if (HexCnt == 0) {
+ *Len = 0;
+ return EFI_SUCCESS;
+ }
+ //
+ // Two Unicode characters make up 1 buffer byte. Round up.
+ //
+ BufferLength = (HexCnt + 1) / 2;
+
+ //
+ // Test if buffer is passed enough.
+ //
+ if (BufferLength > (*Len)) {
+ *Len = BufferLength;
+ return EFI_BUFFER_TOO_SMALL;
+ }
+
+ *Len = BufferLength;
+
+ for (Idx = 0; Idx < HexCnt; Idx++) {
+
+ R8_IsHexDigit (&Digit, Str[HexCnt - 1 - Idx]);
+
+ //
+ // For odd charaters, write the lower nibble for each buffer byte,
+ // and for even characters, the upper nibble.
+ //
+ if ((Idx & 1) == 0) {
+ Byte = Digit;
+ } else {
+ Byte = Buf[Idx / 2];
+ Byte &= 0x0F;
+ Byte = (UINT8) (Byte | Digit << 4);
+ }
+
+ Buf[Idx / 2] = Byte;
+ }
+
+ if (ConvertedStrLen != NULL) {
+ *ConvertedStrLen = HexCnt;
+ }
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Determines if a Unicode character is a hexadecimal digit.
+ The test is case insensitive.
+
+ @param Digit Pointer to byte that receives the value of the hex
+ character.
+ @param Char Unicode character to test.
+
+ @retval TRUE If the character is a hexadecimal digit.
+ @retval FALSE Otherwise.
+
+**/
+BOOLEAN
+R8_IsHexDigit (
+ OUT UINT8 *Digit,
+ IN CHAR16 Char
+ )
+{
+ //
+ // Porting Guide:
+ // This library interface is simply obsolete.
+ // Include the source code to user code.
+ //
+
+ if ((Char >= L'0') && (Char <= L'9')) {
+ *Digit = (UINT8) (Char - L'0');
+ return TRUE;
+ }
+
+ if ((Char >= L'A') && (Char <= L'F')) {
+ *Digit = (UINT8) (Char - L'A' + 0x0A);
+ return TRUE;
+ }
+
+ if ((Char >= L'a') && (Char <= L'f')) {
+ *Digit = (UINT8) (Char - L'a' + 0x0A);
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+
|