1 /*++ 2 3 Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR> 4 This program and the accompanying materials 5 are licensed and made available under the terms and conditions of the BSD License 6 which accompanies this distribution. The full text of the license may be found at 7 http://opensource.org/licenses/bsd-license.php 8 9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11 12 Module Name: 13 14 ValueToString.c 15 16 Abstract: 17 18 Routines changing value to Hex or Dec string 19 20 --*/ 21 22 #include "Tiano.h" 23 #include "EfiDriverLib.h" 24 25 static CHAR16 mHexStr[] = { L'0', L'1', L'2', L'3', L'4', L'5', L'6', L'7', 26 L'8', L'9', L'A', L'B', L'C', L'D', L'E', L'F' }; 27 28 UINTN 29 EfiValueToHexStr ( 30 IN OUT CHAR16 *Buffer, 31 IN UINT64 Value, 32 IN UINTN Flags, 33 IN UINTN Width 34 ) 35 /*++ 36 37 Routine Description: 38 39 VSPrint worker function that prints a Value as a hex number in Buffer 40 41 Arguments: 42 43 Buffer - Location to place ascii hex string of Value. 44 45 Value - Hex value to convert to a string in Buffer. 46 47 Flags - Flags to use in printing Hex string, see file header for details. 48 49 Width - Width of hex value. 50 51 Returns: 52 53 Number of characters printed. 54 55 --*/ 56 { 57 CHAR16 TempBuffer[CHARACTER_NUMBER_FOR_VALUE]; 58 CHAR16 *TempStr; 59 CHAR16 Prefix; 60 CHAR16 *BufferPtr; 61 UINTN Count; 62 UINTN Index; 63 64 TempStr = TempBuffer; 65 BufferPtr = Buffer; 66 67 // 68 // Count starts at one since we will null terminate. Each iteration of the 69 // loop picks off one nibble. Oh yea TempStr ends up backwards 70 // 71 Count = 0; 72 73 if (Width > CHARACTER_NUMBER_FOR_VALUE - 1) { 74 Width = CHARACTER_NUMBER_FOR_VALUE - 1; 75 } 76 77 do { 78 Index = ((UINTN)Value & 0xf); 79 *(TempStr++) = mHexStr[Index]; 80 Value = RShiftU64 (Value, 4); 81 Count++; 82 } while (Value != 0); 83 84 if (Flags & PREFIX_ZERO) { 85 Prefix = '0'; 86 } else { 87 Prefix = ' '; 88 } 89 90 Index = Count; 91 if (!(Flags & LEFT_JUSTIFY)) { 92 for (; Index < Width; Index++) { 93 *(TempStr++) = Prefix; 94 } 95 } 96 97 // 98 // Reverse temp string into Buffer. 99 // 100 if (Width > 0 && (UINTN) (TempStr - TempBuffer) > Width) { 101 TempStr = TempBuffer + Width; 102 } 103 Index = 0; 104 while (TempStr != TempBuffer) { 105 *(BufferPtr++) = *(--TempStr); 106 Index++; 107 } 108 109 *BufferPtr = 0; 110 return Index; 111 } 112 113 114 UINTN 115 EfiValueToString ( 116 IN OUT CHAR16 *Buffer, 117 IN INT64 Value, 118 IN UINTN Flags, 119 IN UINTN Width 120 ) 121 /*++ 122 123 Routine Description: 124 125 VSPrint worker function that prints a Value as a decimal number in Buffer 126 127 Arguments: 128 129 Buffer - Location to place ascii decimal number string of Value. 130 131 Value - Decimal value to convert to a string in Buffer. 132 133 Flags - Flags to use in printing decimal string, see file header for details. 134 135 Width - Width of hex value. 136 137 Returns: 138 139 Number of characters printed. 140 141 --*/ 142 { 143 CHAR16 TempBuffer[CHARACTER_NUMBER_FOR_VALUE]; 144 CHAR16 *TempStr; 145 CHAR16 *BufferPtr; 146 UINTN Count; 147 UINTN ValueCharNum; 148 UINTN Remainder; 149 CHAR16 Prefix; 150 UINTN Index; 151 BOOLEAN ValueIsNegative; 152 153 TempStr = TempBuffer; 154 BufferPtr = Buffer; 155 Count = 0; 156 ValueCharNum = 0; 157 ValueIsNegative = FALSE; 158 Remainder = 0; 159 160 if (Width > CHARACTER_NUMBER_FOR_VALUE - 1) { 161 Width = CHARACTER_NUMBER_FOR_VALUE - 1; 162 } 163 164 if (Value < 0) { 165 Value = -Value; 166 ValueIsNegative = TRUE; 167 } 168 169 do { 170 Value = (INT64)DivU64x32 ((UINT64)Value, 10, &Remainder); 171 *(TempStr++) = (CHAR16)(Remainder + '0'); 172 ValueCharNum++; 173 Count++; 174 if ((Flags & COMMA_TYPE) == COMMA_TYPE) { 175 if (ValueCharNum % 3 == 0 && Value != 0) { 176 *(TempStr++) = ','; 177 Count++; 178 } 179 } 180 } while (Value != 0); 181 182 if (ValueIsNegative) { 183 *(TempStr++) = '-'; 184 Count++; 185 } 186 187 if ((Flags & PREFIX_ZERO) && !ValueIsNegative) { 188 Prefix = '0'; 189 } else { 190 Prefix = ' '; 191 } 192 193 Index = Count; 194 if (!(Flags & LEFT_JUSTIFY)) { 195 for (; Index < Width; Index++) { 196 *(TempStr++) = Prefix; 197 } 198 } 199 200 // 201 // Reverse temp string into Buffer. 202 // 203 if (Width > 0 && (UINTN) (TempStr - TempBuffer) > Width) { 204 TempStr = TempBuffer + Width; 205 } 206 Index = 0; 207 while (TempStr != TempBuffer) { 208 *(BufferPtr++) = *(--TempStr); 209 Index++; 210 } 211 212 *BufferPtr = 0; 213 return Index; 214 } 215
