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Diffstat (limited to 'EDK/Foundation/Library/EfiCommonLib/ValueToString.c')
| -rw-r--r-- | EDK/Foundation/Library/EfiCommonLib/ValueToString.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/EDK/Foundation/Library/EfiCommonLib/ValueToString.c b/EDK/Foundation/Library/EfiCommonLib/ValueToString.c new file mode 100644 index 0000000..f31b0de --- /dev/null +++ b/EDK/Foundation/Library/EfiCommonLib/ValueToString.c @@ -0,0 +1,213 @@ +/*++ + +Copyright (c) 2004, 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. + +Module Name: + + ValueToString.c + +Abstract: + + Routines changing value to Hex or Dec string + +--*/ + +#include "Tiano.h" +#include "EfiDriverLib.h" + +static CHAR16 mHexStr[] = { L'0', L'1', L'2', L'3', L'4', L'5', L'6', L'7', + L'8', L'9', L'A', L'B', L'C', L'D', L'E', L'F' }; + +UINTN +EfiValueToHexStr ( + IN OUT CHAR16 *Buffer, + IN UINT64 Value, + IN UINTN Flags, + IN UINTN Width + ) +/*++ + +Routine Description: + + VSPrint worker function that prints a Value as a hex number in Buffer + +Arguments: + + Buffer - Location to place ascii hex string of Value. + + Value - Hex value to convert to a string in Buffer. + + Flags - Flags to use in printing Hex string, see file header for details. + + Width - Width of hex value. + +Returns: + + Number of characters printed. + +--*/ +{ + CHAR16 TempBuffer[CHARACTER_NUMBER_FOR_VALUE]; + CHAR16 *TempStr; + CHAR16 Prefix; + CHAR16 *BufferPtr; + UINTN Count; + UINTN Index; + + TempStr = TempBuffer; + BufferPtr = Buffer; + + // + // Count starts at one since we will null terminate. Each iteration of the + // loop picks off one nibble. Oh yea TempStr ends up backwards + // + Count = 0; + + if (Width > CHARACTER_NUMBER_FOR_VALUE - 1) { + Width = CHARACTER_NUMBER_FOR_VALUE - 1; + } + + do { + Index = ((UINTN)Value & 0xf); + *(TempStr++) = mHexStr[Index]; + Value = RShiftU64 (Value, 4); + Count++; + } while (Value != 0); + + if (Flags & PREFIX_ZERO) { + Prefix = '0'; + } else { + Prefix = ' '; + } + + Index = Count; + if (!(Flags & LEFT_JUSTIFY)) { + for (; Index < Width; Index++) { + *(TempStr++) = Prefix; + } + } + + // + // Reverse temp string into Buffer. + // + if (Width > 0 && (UINTN) (TempStr - TempBuffer) > Width) { + TempStr = TempBuffer + Width; + } + Index = 0; + while (TempStr != TempBuffer) { + *(BufferPtr++) = *(--TempStr); + Index++; + } + + *BufferPtr = 0; + return Index; +} + + +UINTN +EfiValueToString ( + IN OUT CHAR16 *Buffer, + IN INT64 Value, + IN UINTN Flags, + IN UINTN Width + ) +/*++ + +Routine Description: + + VSPrint worker function that prints a Value as a decimal number in Buffer + +Arguments: + + Buffer - Location to place ascii decimal number string of Value. + + Value - Decimal value to convert to a string in Buffer. + + Flags - Flags to use in printing decimal string, see file header for details. + + Width - Width of hex value. + +Returns: + + Number of characters printed. + +--*/ +{ + CHAR16 TempBuffer[CHARACTER_NUMBER_FOR_VALUE]; + CHAR16 *TempStr; + CHAR16 *BufferPtr; + UINTN Count; + UINTN ValueCharNum; + UINTN Remainder; + CHAR16 Prefix; + UINTN Index; + BOOLEAN ValueIsNegative; + + TempStr = TempBuffer; + BufferPtr = Buffer; + Count = 0; + ValueCharNum = 0; + ValueIsNegative = FALSE; + + if (Width > CHARACTER_NUMBER_FOR_VALUE - 1) { + Width = CHARACTER_NUMBER_FOR_VALUE - 1; + } + + if (Value < 0) { + Value = -Value; + ValueIsNegative = TRUE; + } + + do { + Value = (INT64)DivU64x32 ((UINT64)Value, 10, &Remainder); + *(TempStr++) = (CHAR16)(Remainder + '0'); + ValueCharNum++; + Count++; + if ((Flags & COMMA_TYPE) == COMMA_TYPE) { + if (ValueCharNum % 3 == 0 && Value != 0) { + *(TempStr++) = ','; + Count++; + } + } + } while (Value != 0); + + if (ValueIsNegative) { + *(TempStr++) = '-'; + Count++; + } + + if ((Flags & PREFIX_ZERO) && !ValueIsNegative) { + Prefix = '0'; + } else { + Prefix = ' '; + } + + Index = Count; + if (!(Flags & LEFT_JUSTIFY)) { + for (; Index < Width; Index++) { + *(TempStr++) = Prefix; + } + } + + // + // Reverse temp string into Buffer. + // + if (Width > 0 && (UINTN) (TempStr - TempBuffer) > Width) { + TempStr = TempBuffer + Width; + } + Index = 0; + while (TempStr != TempBuffer) { + *(BufferPtr++) = *(--TempStr); + Index++; + } + + *BufferPtr = 0; + return Index; +} |