utstrtoul64.c revision 1.1.1.3.2.2
1 1.1.1.3.2.2 jdolecek /******************************************************************************* 2 1.1.1.3.2.2 jdolecek * 3 1.1.1.3.2.2 jdolecek * Module Name: utstrtoul64 - String-to-integer conversion support for both 4 1.1.1.3.2.2 jdolecek * 64-bit and 32-bit integers 5 1.1.1.3.2.2 jdolecek * 6 1.1.1.3.2.2 jdolecek ******************************************************************************/ 7 1.1.1.3.2.2 jdolecek 8 1.1.1.3.2.2 jdolecek /* 9 1.1.1.3.2.2 jdolecek * Copyright (C) 2000 - 2017, Intel Corp. 10 1.1.1.3.2.2 jdolecek * All rights reserved. 11 1.1.1.3.2.2 jdolecek * 12 1.1.1.3.2.2 jdolecek * Redistribution and use in source and binary forms, with or without 13 1.1.1.3.2.2 jdolecek * modification, are permitted provided that the following conditions 14 1.1.1.3.2.2 jdolecek * are met: 15 1.1.1.3.2.2 jdolecek * 1. Redistributions of source code must retain the above copyright 16 1.1.1.3.2.2 jdolecek * notice, this list of conditions, and the following disclaimer, 17 1.1.1.3.2.2 jdolecek * without modification. 18 1.1.1.3.2.2 jdolecek * 2. Redistributions in binary form must reproduce at minimum a disclaimer 19 1.1.1.3.2.2 jdolecek * substantially similar to the "NO WARRANTY" disclaimer below 20 1.1.1.3.2.2 jdolecek * ("Disclaimer") and any redistribution must be conditioned upon 21 1.1.1.3.2.2 jdolecek * including a substantially similar Disclaimer requirement for further 22 1.1.1.3.2.2 jdolecek * binary redistribution. 23 1.1.1.3.2.2 jdolecek * 3. Neither the names of the above-listed copyright holders nor the names 24 1.1.1.3.2.2 jdolecek * of any contributors may be used to endorse or promote products derived 25 1.1.1.3.2.2 jdolecek * from this software without specific prior written permission. 26 1.1.1.3.2.2 jdolecek * 27 1.1.1.3.2.2 jdolecek * Alternatively, this software may be distributed under the terms of the 28 1.1.1.3.2.2 jdolecek * GNU General Public License ("GPL") version 2 as published by the Free 29 1.1.1.3.2.2 jdolecek * Software Foundation. 30 1.1.1.3.2.2 jdolecek * 31 1.1.1.3.2.2 jdolecek * NO WARRANTY 32 1.1.1.3.2.2 jdolecek * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 33 1.1.1.3.2.2 jdolecek * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 34 1.1.1.3.2.2 jdolecek * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 35 1.1.1.3.2.2 jdolecek * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 36 1.1.1.3.2.2 jdolecek * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 1.1.1.3.2.2 jdolecek * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 1.1.1.3.2.2 jdolecek * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 1.1.1.3.2.2 jdolecek * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 40 1.1.1.3.2.2 jdolecek * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 41 1.1.1.3.2.2 jdolecek * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 42 1.1.1.3.2.2 jdolecek * POSSIBILITY OF SUCH DAMAGES. 43 1.1.1.3.2.2 jdolecek */ 44 1.1.1.3.2.2 jdolecek 45 1.1.1.3.2.2 jdolecek #include "acpi.h" 46 1.1.1.3.2.2 jdolecek #include "accommon.h" 47 1.1.1.3.2.2 jdolecek 48 1.1.1.3.2.2 jdolecek #define _COMPONENT ACPI_UTILITIES 49 1.1.1.3.2.2 jdolecek ACPI_MODULE_NAME ("utstrtoul64") 50 1.1.1.3.2.2 jdolecek 51 1.1.1.3.2.2 jdolecek 52 1.1.1.3.2.2 jdolecek /******************************************************************************* 53 1.1.1.3.2.2 jdolecek * 54 1.1.1.3.2.2 jdolecek * This module contains the top-level string to 64/32-bit unsigned integer 55 1.1.1.3.2.2 jdolecek * conversion functions: 56 1.1.1.3.2.2 jdolecek * 57 1.1.1.3.2.2 jdolecek * 1) A standard strtoul() function that supports 64-bit integers, base 58 1.1.1.3.2.2 jdolecek * 8/10/16, with integer overflow support. This is used mainly by the 59 1.1.1.3.2.2 jdolecek * iASL compiler, which implements tighter constraints on integer 60 1.1.1.3.2.2 jdolecek * constants than the runtime (interpreter) integer-to-string conversions. 61 1.1.1.3.2.2 jdolecek * 2) Runtime "Explicit conversion" as defined in the ACPI specification. 62 1.1.1.3.2.2 jdolecek * 3) Runtime "Implicit conversion" as defined in the ACPI specification. 63 1.1.1.3.2.2 jdolecek * 64 1.1.1.3.2.2 jdolecek * Current users of this module: 65 1.1.1.3.2.2 jdolecek * 66 1.1.1.3.2.2 jdolecek * iASL - Preprocessor (constants and math expressions) 67 1.1.1.3.2.2 jdolecek * iASL - Main parser, conversion of constants to integers 68 1.1.1.3.2.2 jdolecek * iASL - Data Table Compiler parser (constants and math expressions) 69 1.1.1.3.2.2 jdolecek * Interpreter - Implicit and explicit conversions, GPE method names 70 1.1.1.3.2.2 jdolecek * Interpreter - Repair code for return values from predefined names 71 1.1.1.3.2.2 jdolecek * Debugger - Command line input string conversion 72 1.1.1.3.2.2 jdolecek * AcpiDump - ACPI table physical addresses 73 1.1.1.3.2.2 jdolecek * AcpiExec - Support for namespace overrides 74 1.1.1.3.2.2 jdolecek * 75 1.1.1.3.2.2 jdolecek * Notes concerning users of these interfaces: 76 1.1.1.3.2.2 jdolecek * 77 1.1.1.3.2.2 jdolecek * AcpiGbl_IntegerByteWidth is used to set the 32/64 bit limit for explicit 78 1.1.1.3.2.2 jdolecek * and implicit conversions. This global must be set to the proper width. 79 1.1.1.3.2.2 jdolecek * For the core ACPICA code, the width depends on the DSDT version. For the 80 1.1.1.3.2.2 jdolecek * AcpiUtStrtoul64 interface, all conversions are 64 bits. This interface is 81 1.1.1.3.2.2 jdolecek * used primarily for iASL, where the default width is 64 bits for all parsers, 82 1.1.1.3.2.2 jdolecek * but error checking is performed later to flag cases where a 64-bit constant 83 1.1.1.3.2.2 jdolecek * is wrongly defined in a 32-bit DSDT/SSDT. 84 1.1.1.3.2.2 jdolecek * 85 1.1.1.3.2.2 jdolecek * In ACPI, the only place where octal numbers are supported is within 86 1.1.1.3.2.2 jdolecek * the ASL language itself. This is implemented via the main AcpiUtStrtoul64 87 1.1.1.3.2.2 jdolecek * interface. According the ACPI specification, there is no ACPI runtime 88 1.1.1.3.2.2 jdolecek * support (explicit/implicit) for octal string conversions. 89 1.1.1.3.2.2 jdolecek * 90 1.1.1.3.2.2 jdolecek ******************************************************************************/ 91 1.1.1.3.2.2 jdolecek 92 1.1.1.3.2.2 jdolecek 93 1.1.1.3.2.2 jdolecek /******************************************************************************* 94 1.1.1.3.2.2 jdolecek * 95 1.1.1.3.2.2 jdolecek * FUNCTION: AcpiUtStrtoul64 96 1.1.1.3.2.2 jdolecek * 97 1.1.1.3.2.2 jdolecek * PARAMETERS: String - Null terminated input string, 98 1.1.1.3.2.2 jdolecek * must be a valid pointer 99 1.1.1.3.2.2 jdolecek * ReturnValue - Where the converted integer is 100 1.1.1.3.2.2 jdolecek * returned. Must be a valid pointer 101 1.1.1.3.2.2 jdolecek * 102 1.1.1.3.2.2 jdolecek * RETURN: Status and converted integer. Returns an exception on a 103 1.1.1.3.2.2 jdolecek * 64-bit numeric overflow 104 1.1.1.3.2.2 jdolecek * 105 1.1.1.3.2.2 jdolecek * DESCRIPTION: Convert a string into an unsigned integer. Always performs a 106 1.1.1.3.2.2 jdolecek * full 64-bit conversion, regardless of the current global 107 1.1.1.3.2.2 jdolecek * integer width. Supports Decimal, Hex, and Octal strings. 108 1.1.1.3.2.2 jdolecek * 109 1.1.1.3.2.2 jdolecek * Current users of this function: 110 1.1.1.3.2.2 jdolecek * 111 1.1.1.3.2.2 jdolecek * iASL - Preprocessor (constants and math expressions) 112 1.1.1.3.2.2 jdolecek * iASL - Main ASL parser, conversion of ASL constants to integers 113 1.1.1.3.2.2 jdolecek * iASL - Data Table Compiler parser (constants and math expressions) 114 1.1.1.3.2.2 jdolecek * Interpreter - Repair code for return values from predefined names 115 1.1.1.3.2.2 jdolecek * AcpiDump - ACPI table physical addresses 116 1.1.1.3.2.2 jdolecek * AcpiExec - Support for namespace overrides 117 1.1.1.3.2.2 jdolecek * 118 1.1.1.3.2.2 jdolecek ******************************************************************************/ 119 1.1.1.3.2.2 jdolecek 120 1.1.1.3.2.2 jdolecek ACPI_STATUS 121 1.1.1.3.2.2 jdolecek AcpiUtStrtoul64 ( 122 1.1.1.3.2.2 jdolecek char *String, 123 1.1.1.3.2.2 jdolecek UINT64 *ReturnValue) 124 1.1.1.3.2.2 jdolecek { 125 1.1.1.3.2.2 jdolecek ACPI_STATUS Status = AE_OK; 126 1.1.1.3.2.2 jdolecek UINT8 OriginalBitWidth; 127 1.1.1.3.2.2 jdolecek UINT32 Base = 10; /* Default is decimal */ 128 1.1.1.3.2.2 jdolecek 129 1.1.1.3.2.2 jdolecek 130 1.1.1.3.2.2 jdolecek ACPI_FUNCTION_TRACE_STR (UtStrtoul64, String); 131 1.1.1.3.2.2 jdolecek 132 1.1.1.3.2.2 jdolecek 133 1.1.1.3.2.2 jdolecek *ReturnValue = 0; 134 1.1.1.3.2.2 jdolecek 135 1.1.1.3.2.2 jdolecek /* A NULL return string returns a value of zero */ 136 1.1.1.3.2.2 jdolecek 137 1.1.1.3.2.2 jdolecek if (*String == 0) 138 1.1.1.3.2.2 jdolecek { 139 1.1.1.3.2.2 jdolecek return_ACPI_STATUS (AE_OK); 140 1.1.1.3.2.2 jdolecek } 141 1.1.1.3.2.2 jdolecek 142 1.1.1.3.2.2 jdolecek if (!AcpiUtRemoveWhitespace (&String)) 143 1.1.1.3.2.2 jdolecek { 144 1.1.1.3.2.2 jdolecek return_ACPI_STATUS (AE_OK); 145 1.1.1.3.2.2 jdolecek } 146 1.1.1.3.2.2 jdolecek 147 1.1.1.3.2.2 jdolecek /* 148 1.1.1.3.2.2 jdolecek * 1) Check for a hex constant. A "0x" prefix indicates base 16. 149 1.1.1.3.2.2 jdolecek */ 150 1.1.1.3.2.2 jdolecek if (AcpiUtDetectHexPrefix (&String)) 151 1.1.1.3.2.2 jdolecek { 152 1.1.1.3.2.2 jdolecek Base = 16; 153 1.1.1.3.2.2 jdolecek } 154 1.1.1.3.2.2 jdolecek 155 1.1.1.3.2.2 jdolecek /* 156 1.1.1.3.2.2 jdolecek * 2) Check for an octal constant, defined to be a leading zero 157 1.1.1.3.2.2 jdolecek * followed by sequence of octal digits (0-7) 158 1.1.1.3.2.2 jdolecek */ 159 1.1.1.3.2.2 jdolecek else if (AcpiUtDetectOctalPrefix (&String)) 160 1.1.1.3.2.2 jdolecek { 161 1.1.1.3.2.2 jdolecek Base = 8; 162 1.1.1.3.2.2 jdolecek } 163 1.1.1.3.2.2 jdolecek 164 1.1.1.3.2.2 jdolecek if (!AcpiUtRemoveLeadingZeros (&String)) 165 1.1.1.3.2.2 jdolecek { 166 1.1.1.3.2.2 jdolecek return_ACPI_STATUS (AE_OK); /* Return value 0 */ 167 1.1.1.3.2.2 jdolecek } 168 1.1.1.3.2.2 jdolecek 169 1.1.1.3.2.2 jdolecek /* 170 1.1.1.3.2.2 jdolecek * Force a full 64-bit conversion. The caller (usually iASL) must 171 1.1.1.3.2.2 jdolecek * check for a 32-bit overflow later as necessary (If current mode 172 1.1.1.3.2.2 jdolecek * is 32-bit, meaning a 32-bit DSDT). 173 1.1.1.3.2.2 jdolecek */ 174 1.1.1.3.2.2 jdolecek OriginalBitWidth = AcpiGbl_IntegerBitWidth; 175 1.1.1.3.2.2 jdolecek AcpiGbl_IntegerBitWidth = 64; 176 1.1.1.3.2.2 jdolecek 177 1.1.1.3.2.2 jdolecek /* 178 1.1.1.3.2.2 jdolecek * Perform the base 8, 10, or 16 conversion. A 64-bit numeric overflow 179 1.1.1.3.2.2 jdolecek * will return an exception (to allow iASL to flag the statement). 180 1.1.1.3.2.2 jdolecek */ 181 1.1.1.3.2.2 jdolecek switch (Base) 182 1.1.1.3.2.2 jdolecek { 183 1.1.1.3.2.2 jdolecek case 8: 184 1.1.1.3.2.2 jdolecek Status = AcpiUtConvertOctalString (String, ReturnValue); 185 1.1.1.3.2.2 jdolecek break; 186 1.1.1.3.2.2 jdolecek 187 1.1.1.3.2.2 jdolecek case 10: 188 1.1.1.3.2.2 jdolecek Status = AcpiUtConvertDecimalString (String, ReturnValue); 189 1.1.1.3.2.2 jdolecek break; 190 1.1.1.3.2.2 jdolecek 191 1.1.1.3.2.2 jdolecek case 16: 192 1.1.1.3.2.2 jdolecek default: 193 1.1.1.3.2.2 jdolecek Status = AcpiUtConvertHexString (String, ReturnValue); 194 1.1.1.3.2.2 jdolecek break; 195 1.1.1.3.2.2 jdolecek } 196 1.1.1.3.2.2 jdolecek 197 1.1.1.3.2.2 jdolecek /* Only possible exception from above is a 64-bit overflow */ 198 1.1.1.3.2.2 jdolecek 199 1.1.1.3.2.2 jdolecek AcpiGbl_IntegerBitWidth = OriginalBitWidth; 200 1.1.1.3.2.2 jdolecek return_ACPI_STATUS (Status); 201 1.1.1.3.2.2 jdolecek } 202 1.1.1.3.2.2 jdolecek 203 1.1.1.3.2.2 jdolecek 204 1.1.1.3.2.2 jdolecek /******************************************************************************* 205 1.1.1.3.2.2 jdolecek * 206 1.1.1.3.2.2 jdolecek * FUNCTION: AcpiUtImplicitStrtoul64 207 1.1.1.3.2.2 jdolecek * 208 1.1.1.3.2.2 jdolecek * PARAMETERS: String - Null terminated input string, 209 1.1.1.3.2.2 jdolecek * must be a valid pointer 210 1.1.1.3.2.2 jdolecek * 211 1.1.1.3.2.2 jdolecek * RETURN: Converted integer 212 1.1.1.3.2.2 jdolecek * 213 1.1.1.3.2.2 jdolecek * DESCRIPTION: Perform a 64-bit conversion with restrictions placed upon 214 1.1.1.3.2.2 jdolecek * an "implicit conversion" by the ACPI specification. Used by 215 1.1.1.3.2.2 jdolecek * many ASL operators that require an integer operand, and support 216 1.1.1.3.2.2 jdolecek * an automatic (implicit) conversion from a string operand 217 1.1.1.3.2.2 jdolecek * to the final integer operand. The major restriction is that 218 1.1.1.3.2.2 jdolecek * only hex strings are supported. 219 1.1.1.3.2.2 jdolecek * 220 1.1.1.3.2.2 jdolecek * ----------------------------------------------------------------------------- 221 1.1.1.3.2.2 jdolecek * 222 1.1.1.3.2.2 jdolecek * Base is always 16, either with or without the 0x prefix. Decimal and 223 1.1.1.3.2.2 jdolecek * Octal strings are not supported, as per the ACPI specification. 224 1.1.1.3.2.2 jdolecek * 225 1.1.1.3.2.2 jdolecek * Examples (both are hex values): 226 1.1.1.3.2.2 jdolecek * Add ("BA98", Arg0, Local0) 227 1.1.1.3.2.2 jdolecek * Subtract ("0x12345678", Arg1, Local1) 228 1.1.1.3.2.2 jdolecek * 229 1.1.1.3.2.2 jdolecek * Conversion rules as extracted from the ACPI specification: 230 1.1.1.3.2.2 jdolecek * 231 1.1.1.3.2.2 jdolecek * The converted integer is initialized to the value zero. 232 1.1.1.3.2.2 jdolecek * The ASCII string is always interpreted as a hexadecimal constant. 233 1.1.1.3.2.2 jdolecek * 234 1.1.1.3.2.2 jdolecek * 1) According to the ACPI specification, a "0x" prefix is not allowed. 235 1.1.1.3.2.2 jdolecek * However, ACPICA allows this as an ACPI extension on general 236 1.1.1.3.2.2 jdolecek * principle. (NO ERROR) 237 1.1.1.3.2.2 jdolecek * 238 1.1.1.3.2.2 jdolecek * 2) The conversion terminates when the size of an integer is reached 239 1.1.1.3.2.2 jdolecek * (32 or 64 bits). There are no numeric overflow conditions. (NO ERROR) 240 1.1.1.3.2.2 jdolecek * 241 1.1.1.3.2.2 jdolecek * 3) The first non-hex character terminates the conversion and returns 242 1.1.1.3.2.2 jdolecek * the current accumulated value of the converted integer (NO ERROR). 243 1.1.1.3.2.2 jdolecek * 244 1.1.1.3.2.2 jdolecek * 4) Conversion of a null (zero-length) string to an integer is 245 1.1.1.3.2.2 jdolecek * technically not allowed. However, ACPICA allows this as an ACPI 246 1.1.1.3.2.2 jdolecek * extension. The conversion returns the value 0. (NO ERROR) 247 1.1.1.3.2.2 jdolecek * 248 1.1.1.3.2.2 jdolecek * NOTE: There are no error conditions returned by this function. At 249 1.1.1.3.2.2 jdolecek * the minimum, a value of zero is returned. 250 1.1.1.3.2.2 jdolecek * 251 1.1.1.3.2.2 jdolecek * Current users of this function: 252 1.1.1.3.2.2 jdolecek * 253 1.1.1.3.2.2 jdolecek * Interpreter - All runtime implicit conversions, as per ACPI specification 254 1.1.1.3.2.2 jdolecek * iASL - Data Table Compiler parser (constants and math expressions) 255 1.1.1.3.2.2 jdolecek * 256 1.1.1.3.2.2 jdolecek ******************************************************************************/ 257 1.1.1.3.2.2 jdolecek 258 1.1.1.3.2.2 jdolecek UINT64 259 1.1.1.3.2.2 jdolecek AcpiUtImplicitStrtoul64 ( 260 1.1.1.3.2.2 jdolecek char *String) 261 1.1.1.3.2.2 jdolecek { 262 1.1.1.3.2.2 jdolecek UINT64 ConvertedInteger = 0; 263 1.1.1.3.2.2 jdolecek 264 1.1.1.3.2.2 jdolecek 265 1.1.1.3.2.2 jdolecek ACPI_FUNCTION_TRACE_STR (UtImplicitStrtoul64, String); 266 1.1.1.3.2.2 jdolecek 267 1.1.1.3.2.2 jdolecek 268 1.1.1.3.2.2 jdolecek if (!AcpiUtRemoveWhitespace (&String)) 269 1.1.1.3.2.2 jdolecek { 270 1.1.1.3.2.2 jdolecek return_VALUE (0); 271 1.1.1.3.2.2 jdolecek } 272 1.1.1.3.2.2 jdolecek 273 1.1.1.3.2.2 jdolecek /* 274 1.1.1.3.2.2 jdolecek * Per the ACPI specification, only hexadecimal is supported for 275 1.1.1.3.2.2 jdolecek * implicit conversions, and the "0x" prefix is "not allowed". 276 1.1.1.3.2.2 jdolecek * However, allow a "0x" prefix as an ACPI extension. 277 1.1.1.3.2.2 jdolecek */ 278 1.1.1.3.2.2 jdolecek AcpiUtDetectHexPrefix (&String); 279 1.1.1.3.2.2 jdolecek 280 1.1.1.3.2.2 jdolecek if (!AcpiUtRemoveLeadingZeros (&String)) 281 1.1.1.3.2.2 jdolecek { 282 1.1.1.3.2.2 jdolecek return_VALUE (0); 283 1.1.1.3.2.2 jdolecek } 284 1.1.1.3.2.2 jdolecek 285 1.1.1.3.2.2 jdolecek /* 286 1.1.1.3.2.2 jdolecek * Ignore overflow as per the ACPI specification. This is implemented by 287 1.1.1.3.2.2 jdolecek * ignoring the return status from the conversion function called below. 288 1.1.1.3.2.2 jdolecek * On overflow, the input string is simply truncated. 289 1.1.1.3.2.2 jdolecek */ 290 1.1.1.3.2.2 jdolecek AcpiUtConvertHexString (String, &ConvertedInteger); 291 1.1.1.3.2.2 jdolecek return_VALUE (ConvertedInteger); 292 1.1.1.3.2.2 jdolecek } 293 1.1.1.3.2.2 jdolecek 294 1.1.1.3.2.2 jdolecek 295 1.1.1.3.2.2 jdolecek /******************************************************************************* 296 1.1.1.3.2.2 jdolecek * 297 1.1.1.3.2.2 jdolecek * FUNCTION: AcpiUtExplicitStrtoul64 298 1.1.1.3.2.2 jdolecek * 299 1.1.1.3.2.2 jdolecek * PARAMETERS: String - Null terminated input string, 300 1.1.1.3.2.2 jdolecek * must be a valid pointer 301 1.1.1.3.2.2 jdolecek * 302 1.1.1.3.2.2 jdolecek * RETURN: Converted integer 303 1.1.1.3.2.2 jdolecek * 304 1.1.1.3.2.2 jdolecek * DESCRIPTION: Perform a 64-bit conversion with the restrictions placed upon 305 1.1.1.3.2.2 jdolecek * an "explicit conversion" by the ACPI specification. The 306 1.1.1.3.2.2 jdolecek * main restriction is that only hex and decimal are supported. 307 1.1.1.3.2.2 jdolecek * 308 1.1.1.3.2.2 jdolecek * ----------------------------------------------------------------------------- 309 1.1.1.3.2.2 jdolecek * 310 1.1.1.3.2.2 jdolecek * Base is either 10 (default) or 16 (with 0x prefix). Octal (base 8) strings 311 1.1.1.3.2.2 jdolecek * are not supported, as per the ACPI specification. 312 1.1.1.3.2.2 jdolecek * 313 1.1.1.3.2.2 jdolecek * Examples: 314 1.1.1.3.2.2 jdolecek * ToInteger ("1000") Decimal 315 1.1.1.3.2.2 jdolecek * ToInteger ("0xABCD") Hex 316 1.1.1.3.2.2 jdolecek * 317 1.1.1.3.2.2 jdolecek * Conversion rules as extracted from the ACPI specification: 318 1.1.1.3.2.2 jdolecek * 319 1.1.1.3.2.2 jdolecek * 1) The input string is either a decimal or hexadecimal numeric string. 320 1.1.1.3.2.2 jdolecek * A hex value must be prefixed by "0x" or it is interpreted as decimal. 321 1.1.1.3.2.2 jdolecek * 322 1.1.1.3.2.2 jdolecek * 2) The value must not exceed the maximum of an integer value 323 1.1.1.3.2.2 jdolecek * (32 or 64 bits). The ACPI specification states the behavior is 324 1.1.1.3.2.2 jdolecek * "unpredictable", so ACPICA matches the behavior of the implicit 325 1.1.1.3.2.2 jdolecek * conversion case. There are no numeric overflow conditions. (NO ERROR) 326 1.1.1.3.2.2 jdolecek * 327 1.1.1.3.2.2 jdolecek * 3) Behavior on the first non-hex character is not defined by the ACPI 328 1.1.1.3.2.2 jdolecek * specification (for the ToInteger operator), so ACPICA matches the 329 1.1.1.3.2.2 jdolecek * behavior of the implicit conversion case. It terminates the 330 1.1.1.3.2.2 jdolecek * conversion and returns the current accumulated value of the converted 331 1.1.1.3.2.2 jdolecek * integer. (NO ERROR) 332 1.1.1.3.2.2 jdolecek * 333 1.1.1.3.2.2 jdolecek * 4) Conversion of a null (zero-length) string to an integer is 334 1.1.1.3.2.2 jdolecek * technically not allowed. However, ACPICA allows this as an ACPI 335 1.1.1.3.2.2 jdolecek * extension. The conversion returns the value 0. (NO ERROR) 336 1.1.1.3.2.2 jdolecek * 337 1.1.1.3.2.2 jdolecek * NOTE: There are no error conditions returned by this function. At the 338 1.1.1.3.2.2 jdolecek * minimum, a value of zero is returned. 339 1.1.1.3.2.2 jdolecek * 340 1.1.1.3.2.2 jdolecek * Current users of this function: 341 1.1.1.3.2.2 jdolecek * 342 1.1.1.3.2.2 jdolecek * Interpreter - Runtime ASL ToInteger operator, as per the ACPI specification 343 1.1.1.3.2.2 jdolecek * 344 1.1.1.3.2.2 jdolecek ******************************************************************************/ 345 1.1.1.3.2.2 jdolecek 346 1.1.1.3.2.2 jdolecek UINT64 347 1.1.1.3.2.2 jdolecek AcpiUtExplicitStrtoul64 ( 348 1.1.1.3.2.2 jdolecek char *String) 349 1.1.1.3.2.2 jdolecek { 350 1.1.1.3.2.2 jdolecek UINT64 ConvertedInteger = 0; 351 1.1.1.3.2.2 jdolecek UINT32 Base = 10; /* Default is decimal */ 352 1.1.1.3.2.2 jdolecek 353 1.1.1.3.2.2 jdolecek 354 1.1.1.3.2.2 jdolecek ACPI_FUNCTION_TRACE_STR (UtExplicitStrtoul64, String); 355 1.1.1.3.2.2 jdolecek 356 1.1.1.3.2.2 jdolecek 357 1.1.1.3.2.2 jdolecek if (!AcpiUtRemoveWhitespace (&String)) 358 1.1.1.3.2.2 jdolecek { 359 1.1.1.3.2.2 jdolecek return_VALUE (0); 360 1.1.1.3.2.2 jdolecek } 361 1.1.1.3.2.2 jdolecek 362 1.1.1.3.2.2 jdolecek /* 363 1.1.1.3.2.2 jdolecek * Only Hex and Decimal are supported, as per the ACPI specification. 364 1.1.1.3.2.2 jdolecek * A "0x" prefix indicates hex; otherwise decimal is assumed. 365 1.1.1.3.2.2 jdolecek */ 366 1.1.1.3.2.2 jdolecek if (AcpiUtDetectHexPrefix (&String)) 367 1.1.1.3.2.2 jdolecek { 368 1.1.1.3.2.2 jdolecek Base = 16; 369 1.1.1.3.2.2 jdolecek } 370 1.1.1.3.2.2 jdolecek 371 1.1.1.3.2.2 jdolecek if (!AcpiUtRemoveLeadingZeros (&String)) 372 1.1.1.3.2.2 jdolecek { 373 1.1.1.3.2.2 jdolecek return_VALUE (0); 374 1.1.1.3.2.2 jdolecek } 375 1.1.1.3.2.2 jdolecek 376 1.1.1.3.2.2 jdolecek /* 377 1.1.1.3.2.2 jdolecek * Ignore overflow as per the ACPI specification. This is implemented by 378 1.1.1.3.2.2 jdolecek * ignoring the return status from the conversion functions called below. 379 1.1.1.3.2.2 jdolecek * On overflow, the input string is simply truncated. 380 1.1.1.3.2.2 jdolecek */ 381 1.1.1.3.2.2 jdolecek switch (Base) 382 1.1.1.3.2.2 jdolecek { 383 1.1.1.3.2.2 jdolecek case 10: 384 1.1.1.3.2.2 jdolecek default: 385 1.1.1.3.2.2 jdolecek AcpiUtConvertDecimalString (String, &ConvertedInteger); 386 1.1.1.3.2.2 jdolecek break; 387 1.1.1.3.2.2 jdolecek 388 1.1.1.3.2.2 jdolecek case 16: 389 1.1.1.3.2.2 jdolecek AcpiUtConvertHexString (String, &ConvertedInteger); 390 1.1.1.3.2.2 jdolecek break; 391 1.1.1.3.2.2 jdolecek } 392 1.1.1.3.2.2 jdolecek 393 1.1.1.3.2.2 jdolecek return_VALUE (ConvertedInteger); 394 1.1.1.3.2.2 jdolecek } 395
Indexes created Sun Oct 19 02:09:48 GMT 2025