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Diffstat (limited to 'sys/contrib/dev/acpica/components/utilities/utstrtoul64.c')
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diff --git a/sys/contrib/dev/acpica/components/utilities/utstrtoul64.c b/sys/contrib/dev/acpica/components/utilities/utstrtoul64.c new file mode 100644 index 000000000000..36bc3b8c5bfa --- /dev/null +++ b/sys/contrib/dev/acpica/components/utilities/utstrtoul64.c @@ -0,0 +1,502 @@ +/******************************************************************************* + * + * Module Name: utstrtoul64 - String-to-integer conversion support for both + * 64-bit and 32-bit integers + * + ******************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2020, Intel Corp. + * All rights reserved. + * + * 2. License + * + * 2.1. This is your license from Intel Corp. under its intellectual property + * rights. You may have additional license terms from the party that provided + * you this software, covering your right to use that party's intellectual + * property rights. + * + * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a + * copy of the source code appearing in this file ("Covered Code") an + * irrevocable, perpetual, worldwide license under Intel's copyrights in the + * base code distributed originally by Intel ("Original Intel Code") to copy, + * make derivatives, distribute, use and display any portion of the Covered + * Code in any form, with the right to sublicense such rights; and + * + * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent + * license (with the right to sublicense), under only those claims of Intel + * patents that are infringed by the Original Intel Code, to make, use, sell, + * offer to sell, and import the Covered Code and derivative works thereof + * solely to the minimum extent necessary to exercise the above copyright + * license, and in no event shall the patent license extend to any additions + * to or modifications of the Original Intel Code. No other license or right + * is granted directly or by implication, estoppel or otherwise; + * + * The above copyright and patent license is granted only if the following + * conditions are met: + * + * 3. Conditions + * + * 3.1. Redistribution of Source with Rights to Further Distribute Source. + * Redistribution of source code of any substantial portion of the Covered + * Code or modification with rights to further distribute source must include + * the above Copyright Notice, the above License, this list of Conditions, + * and the following Disclaimer and Export Compliance provision. In addition, + * Licensee must cause all Covered Code to which Licensee contributes to + * contain a file documenting the changes Licensee made to create that Covered + * Code and the date of any change. Licensee must include in that file the + * documentation of any changes made by any predecessor Licensee. Licensee + * must include a prominent statement that the modification is derived, + * directly or indirectly, from Original Intel Code. + * + * 3.2. Redistribution of Source with no Rights to Further Distribute Source. + * Redistribution of source code of any substantial portion of the Covered + * Code or modification without rights to further distribute source must + * include the following Disclaimer and Export Compliance provision in the + * documentation and/or other materials provided with distribution. In + * addition, Licensee may not authorize further sublicense of source of any + * portion of the Covered Code, and must include terms to the effect that the + * license from Licensee to its licensee is limited to the intellectual + * property embodied in the software Licensee provides to its licensee, and + * not to intellectual property embodied in modifications its licensee may + * make. + * + * 3.3. Redistribution of Executable. Redistribution in executable form of any + * substantial portion of the Covered Code or modification must reproduce the + * above Copyright Notice, and the following Disclaimer and Export Compliance + * provision in the documentation and/or other materials provided with the + * distribution. + * + * 3.4. Intel retains all right, title, and interest in and to the Original + * Intel Code. + * + * 3.5. Neither the name Intel nor any other trademark owned or controlled by + * Intel shall be used in advertising or otherwise to promote the sale, use or + * other dealings in products derived from or relating to the Covered Code + * without prior written authorization from Intel. + * + * 4. Disclaimer and Export Compliance + * + * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED + * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE + * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, + * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY + * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY + * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A + * PARTICULAR PURPOSE. + * + * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES + * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR + * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, + * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY + * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL + * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS + * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY + * LIMITED REMEDY. + * + * 4.3. Licensee shall not export, either directly or indirectly, any of this + * software or system incorporating such software without first obtaining any + * required license or other approval from the U. S. Department of Commerce or + * any other agency or department of the United States Government. In the + * event Licensee exports any such software from the United States or + * re-exports any such software from a foreign destination, Licensee shall + * ensure that the distribution and export/re-export of the software is in + * compliance with all laws, regulations, orders, or other restrictions of the + * U.S. Export Administration Regulations. Licensee agrees that neither it nor + * any of its subsidiaries will export/re-export any technical data, process, + * software, or service, directly or indirectly, to any country for which the + * United States government or any agency thereof requires an export license, + * other governmental approval, or letter of assurance, without first obtaining + * such license, approval or letter. + * + ***************************************************************************** + * + * Alternatively, you may choose to be licensed under the terms of the + * following license: + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Alternatively, you may choose to be licensed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + *****************************************************************************/ + +#include <contrib/dev/acpica/include/acpi.h> +#include <contrib/dev/acpica/include/accommon.h> + +#define _COMPONENT ACPI_UTILITIES + ACPI_MODULE_NAME ("utstrtoul64") + + +/******************************************************************************* + * + * This module contains the top-level string to 64/32-bit unsigned integer + * conversion functions: + * + * 1) A standard strtoul() function that supports 64-bit integers, base + * 8/10/16, with integer overflow support. This is used mainly by the + * iASL compiler, which implements tighter constraints on integer + * constants than the runtime (interpreter) integer-to-string conversions. + * 2) Runtime "Explicit conversion" as defined in the ACPI specification. + * 3) Runtime "Implicit conversion" as defined in the ACPI specification. + * + * Current users of this module: + * + * iASL - Preprocessor (constants and math expressions) + * iASL - Main parser, conversion of constants to integers + * iASL - Data Table Compiler parser (constants and math expressions) + * Interpreter - Implicit and explicit conversions, GPE method names + * Interpreter - Repair code for return values from predefined names + * Debugger - Command line input string conversion + * AcpiDump - ACPI table physical addresses + * AcpiExec - Support for namespace overrides + * + * Notes concerning users of these interfaces: + * + * AcpiGbl_IntegerByteWidth is used to set the 32/64 bit limit for explicit + * and implicit conversions. This global must be set to the proper width. + * For the core ACPICA code, the width depends on the DSDT version. For the + * AcpiUtStrtoul64 interface, all conversions are 64 bits. This interface is + * used primarily for iASL, where the default width is 64 bits for all parsers, + * but error checking is performed later to flag cases where a 64-bit constant + * is wrongly defined in a 32-bit DSDT/SSDT. + * + * In ACPI, the only place where octal numbers are supported is within + * the ASL language itself. This is implemented via the main AcpiUtStrtoul64 + * interface. According the ACPI specification, there is no ACPI runtime + * support (explicit/implicit) for octal string conversions. + * + ******************************************************************************/ + + +/******************************************************************************* + * + * FUNCTION: AcpiUtStrtoul64 + * + * PARAMETERS: String - Null terminated input string, + * must be a valid pointer + * ReturnValue - Where the converted integer is + * returned. Must be a valid pointer + * + * RETURN: Status and converted integer. Returns an exception on a + * 64-bit numeric overflow + * + * DESCRIPTION: Convert a string into an unsigned integer. Always performs a + * full 64-bit conversion, regardless of the current global + * integer width. Supports Decimal, Hex, and Octal strings. + * + * Current users of this function: + * + * iASL - Preprocessor (constants and math expressions) + * iASL - Main ASL parser, conversion of ASL constants to integers + * iASL - Data Table Compiler parser (constants and math expressions) + * Interpreter - Repair code for return values from predefined names + * AcpiDump - ACPI table physical addresses + * AcpiExec - Support for namespace overrides + * + ******************************************************************************/ + +ACPI_STATUS +AcpiUtStrtoul64 ( + char *String, + UINT64 *ReturnValue) +{ + ACPI_STATUS Status = AE_OK; + UINT8 OriginalBitWidth; + UINT32 Base = 10; /* Default is decimal */ + + + ACPI_FUNCTION_TRACE_STR (UtStrtoul64, String); + + + *ReturnValue = 0; + + /* A NULL return string returns a value of zero */ + + if (*String == 0) + { + return_ACPI_STATUS (AE_OK); + } + + if (!AcpiUtRemoveWhitespace (&String)) + { + return_ACPI_STATUS (AE_OK); + } + + /* + * 1) Check for a hex constant. A "0x" prefix indicates base 16. + */ + if (AcpiUtDetectHexPrefix (&String)) + { + Base = 16; + } + + /* + * 2) Check for an octal constant, defined to be a leading zero + * followed by sequence of octal digits (0-7) + */ + else if (AcpiUtDetectOctalPrefix (&String)) + { + Base = 8; + } + + if (!AcpiUtRemoveLeadingZeros (&String)) + { + return_ACPI_STATUS (AE_OK); /* Return value 0 */ + } + + /* + * Force a full 64-bit conversion. The caller (usually iASL) must + * check for a 32-bit overflow later as necessary (If current mode + * is 32-bit, meaning a 32-bit DSDT). + */ + OriginalBitWidth = AcpiGbl_IntegerBitWidth; + AcpiGbl_IntegerBitWidth = 64; + + /* + * Perform the base 8, 10, or 16 conversion. A 64-bit numeric overflow + * will return an exception (to allow iASL to flag the statement). + */ + switch (Base) + { + case 8: + Status = AcpiUtConvertOctalString (String, ReturnValue); + break; + + case 10: + Status = AcpiUtConvertDecimalString (String, ReturnValue); + break; + + case 16: + default: + Status = AcpiUtConvertHexString (String, ReturnValue); + break; + } + + /* Only possible exception from above is a 64-bit overflow */ + + AcpiGbl_IntegerBitWidth = OriginalBitWidth; + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiUtImplicitStrtoul64 + * + * PARAMETERS: String - Null terminated input string, + * must be a valid pointer + * + * RETURN: Converted integer + * + * DESCRIPTION: Perform a 64-bit conversion with restrictions placed upon + * an "implicit conversion" by the ACPI specification. Used by + * many ASL operators that require an integer operand, and support + * an automatic (implicit) conversion from a string operand + * to the final integer operand. The major restriction is that + * only hex strings are supported. + * + * ----------------------------------------------------------------------------- + * + * Base is always 16, either with or without the 0x prefix. Decimal and + * Octal strings are not supported, as per the ACPI specification. + * + * Examples (both are hex values): + * Add ("BA98", Arg0, Local0) + * Subtract ("0x12345678", Arg1, Local1) + * + * Conversion rules as extracted from the ACPI specification: + * + * The converted integer is initialized to the value zero. + * The ASCII string is always interpreted as a hexadecimal constant. + * + * 1) According to the ACPI specification, a "0x" prefix is not allowed. + * However, ACPICA allows this as an ACPI extension on general + * principle. (NO ERROR) + * + * 2) The conversion terminates when the size of an integer is reached + * (32 or 64 bits). There are no numeric overflow conditions. (NO ERROR) + * + * 3) The first non-hex character terminates the conversion and returns + * the current accumulated value of the converted integer (NO ERROR). + * + * 4) Conversion of a null (zero-length) string to an integer is + * technically not allowed. However, ACPICA allows this as an ACPI + * extension. The conversion returns the value 0. (NO ERROR) + * + * NOTE: There are no error conditions returned by this function. At + * the minimum, a value of zero is returned. + * + * Current users of this function: + * + * Interpreter - All runtime implicit conversions, as per ACPI specification + * iASL - Data Table Compiler parser (constants and math expressions) + * + ******************************************************************************/ + +UINT64 +AcpiUtImplicitStrtoul64 ( + char *String) +{ + UINT64 ConvertedInteger = 0; + + + ACPI_FUNCTION_TRACE_STR (UtImplicitStrtoul64, String); + + + if (!AcpiUtRemoveWhitespace (&String)) + { + return_VALUE (0); + } + + /* + * Per the ACPI specification, only hexadecimal is supported for + * implicit conversions, and the "0x" prefix is "not allowed". + * However, allow a "0x" prefix as an ACPI extension. + */ + AcpiUtRemoveHexPrefix (&String); + + if (!AcpiUtRemoveLeadingZeros (&String)) + { + return_VALUE (0); + } + + /* + * Ignore overflow as per the ACPI specification. This is implemented by + * ignoring the return status from the conversion function called below. + * On overflow, the input string is simply truncated. + */ + AcpiUtConvertHexString (String, &ConvertedInteger); + return_VALUE (ConvertedInteger); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiUtExplicitStrtoul64 + * + * PARAMETERS: String - Null terminated input string, + * must be a valid pointer + * + * RETURN: Converted integer + * + * DESCRIPTION: Perform a 64-bit conversion with the restrictions placed upon + * an "explicit conversion" by the ACPI specification. The + * main restriction is that only hex and decimal are supported. + * + * ----------------------------------------------------------------------------- + * + * Base is either 10 (default) or 16 (with 0x prefix). Octal (base 8) strings + * are not supported, as per the ACPI specification. + * + * Examples: + * ToInteger ("1000") Decimal + * ToInteger ("0xABCD") Hex + * + * Conversion rules as extracted from the ACPI specification: + * + * 1) The input string is either a decimal or hexadecimal numeric string. + * A hex value must be prefixed by "0x" or it is interpreted as decimal. + * + * 2) The value must not exceed the maximum of an integer value + * (32 or 64 bits). The ACPI specification states the behavior is + * "unpredictable", so ACPICA matches the behavior of the implicit + * conversion case. There are no numeric overflow conditions. (NO ERROR) + * + * 3) Behavior on the first non-hex character is not defined by the ACPI + * specification (for the ToInteger operator), so ACPICA matches the + * behavior of the implicit conversion case. It terminates the + * conversion and returns the current accumulated value of the converted + * integer. (NO ERROR) + * + * 4) Conversion of a null (zero-length) string to an integer is + * technically not allowed. However, ACPICA allows this as an ACPI + * extension. The conversion returns the value 0. (NO ERROR) + * + * NOTE: There are no error conditions returned by this function. At the + * minimum, a value of zero is returned. + * + * Current users of this function: + * + * Interpreter - Runtime ASL ToInteger operator, as per the ACPI specification + * + ******************************************************************************/ + +UINT64 +AcpiUtExplicitStrtoul64 ( + char *String) +{ + UINT64 ConvertedInteger = 0; + UINT32 Base = 10; /* Default is decimal */ + + + ACPI_FUNCTION_TRACE_STR (UtExplicitStrtoul64, String); + + + if (!AcpiUtRemoveWhitespace (&String)) + { + return_VALUE (0); + } + + /* + * Only Hex and Decimal are supported, as per the ACPI specification. + * A "0x" prefix indicates hex; otherwise decimal is assumed. + */ + if (AcpiUtDetectHexPrefix (&String)) + { + Base = 16; + } + + if (!AcpiUtRemoveLeadingZeros (&String)) + { + return_VALUE (0); + } + + /* + * Ignore overflow as per the ACPI specification. This is implemented by + * ignoring the return status from the conversion functions called below. + * On overflow, the input string is simply truncated. + */ + switch (Base) + { + case 10: + default: + AcpiUtConvertDecimalString (String, &ConvertedInteger); + break; + + case 16: + AcpiUtConvertHexString (String, &ConvertedInteger); + break; + } + + return_VALUE (ConvertedInteger); +} |