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Diffstat (limited to 'sys/contrib/dev/acpica/compiler/aslutils.c')
| -rw-r--r-- | sys/contrib/dev/acpica/compiler/aslutils.c | 1060 |
1 files changed, 1060 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/compiler/aslutils.c b/sys/contrib/dev/acpica/compiler/aslutils.c new file mode 100644 index 0000000..ecba7c3 --- /dev/null +++ b/sys/contrib/dev/acpica/compiler/aslutils.c @@ -0,0 +1,1060 @@ + +/****************************************************************************** + * + * Module Name: aslutils -- compiler utilities + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2009, 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. + * + *****************************************************************************/ + + +#include "aslcompiler.h" +#include "aslcompiler.y.h" +#include "acnamesp.h" +#include "amlcode.h" + +#define _COMPONENT ACPI_COMPILER + ACPI_MODULE_NAME ("aslutils") + +#ifdef _USE_BERKELEY_YACC +extern const char * const AslCompilername[]; +static const char * const *yytname = &AslCompilername[254]; +#else +extern const char * const yytname[]; +#endif + +char HexLookup[] = +{ + '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F' +}; + + +/* Local prototypes */ + +static ACPI_STATUS +UtStrtoul64 ( + char *String, + UINT32 Base, + ACPI_INTEGER *RetInteger); + +static void +UtPadNameWithUnderscores ( + char *NameSeg, + char *PaddedNameSeg); + +static void +UtAttachNameseg ( + ACPI_PARSE_OBJECT *Op, + char *Name); + + +/******************************************************************************* + * + * FUNCTION: AcpiPsDisplayConstantOpcodes + * + * PARAMETERS: None + * + * RETURN: None + * + * DESCRIPTION: Print AML opcodes that can be used in constant expressions. + * + ******************************************************************************/ + +void +UtDisplayConstantOpcodes ( + void) +{ + UINT32 i; + + + printf ("Constant expression opcode information\n\n"); + + for (i = 0; i < sizeof (AcpiGbl_AmlOpInfo) / sizeof (ACPI_OPCODE_INFO); i++) + { + if (AcpiGbl_AmlOpInfo[i].Flags & AML_CONSTANT) + { + printf ("%s\n", AcpiGbl_AmlOpInfo[i].Name); + } + } +} + + +/******************************************************************************* + * + * FUNCTION: UtLocalCalloc + * + * PARAMETERS: Size - Bytes to be allocated + * + * RETURN: Pointer to the allocated memory. Guaranteed to be valid. + * + * DESCRIPTION: Allocate zero-initialized memory. Aborts the compile on an + * allocation failure, on the assumption that nothing more can be + * accomplished. + * + ******************************************************************************/ + +void * +UtLocalCalloc ( + UINT32 Size) +{ + void *Allocated; + + + Allocated = ACPI_ALLOCATE_ZEROED (Size); + if (!Allocated) + { + AslCommonError (ASL_ERROR, ASL_MSG_MEMORY_ALLOCATION, + Gbl_CurrentLineNumber, Gbl_LogicalLineNumber, + Gbl_InputByteCount, Gbl_CurrentColumn, + Gbl_Files[ASL_FILE_INPUT].Filename, NULL); + exit (1); + } + + TotalAllocations++; + TotalAllocated += Size; + return (Allocated); +} + + +/******************************************************************************* + * + * FUNCTION: UtBeginEvent + * + * PARAMETERS: Name - Ascii name of this event + * + * RETURN: Event - Event number (integer index) + * + * DESCRIPTION: Saves the current time with this event + * + ******************************************************************************/ + +UINT8 +UtBeginEvent ( + char *Name) +{ + + if (AslGbl_NextEvent >= ASL_NUM_EVENTS) + { + AcpiOsPrintf ("Ran out of compiler event structs!\n"); + return (AslGbl_NextEvent); + } + + /* Init event with current (start) time */ + + AslGbl_Events[AslGbl_NextEvent].StartTime = AcpiOsGetTimer (); + AslGbl_Events[AslGbl_NextEvent].EventName = Name; + AslGbl_Events[AslGbl_NextEvent].Valid = TRUE; + + return (AslGbl_NextEvent++); +} + + +/******************************************************************************* + * + * FUNCTION: UtEndEvent + * + * PARAMETERS: Event - Event number (integer index) + * + * RETURN: None + * + * DESCRIPTION: Saves the current time (end time) with this event + * + ******************************************************************************/ + +void +UtEndEvent ( + UINT8 Event) +{ + + if (Event >= ASL_NUM_EVENTS) + { + return; + } + + /* Insert end time for event */ + + AslGbl_Events[Event].EndTime = AcpiOsGetTimer (); +} + + +/******************************************************************************* + * + * FUNCTION: UtHexCharToValue + * + * PARAMETERS: HexChar - Hex character in Ascii + * + * RETURN: The binary value of the hex character + * + * DESCRIPTION: Perform ascii-to-hex translation + * + ******************************************************************************/ + +UINT8 +UtHexCharToValue ( + int HexChar) +{ + + if (HexChar <= 0x39) + { + return ((UINT8) (HexChar - 0x30)); + } + + if (HexChar <= 0x46) + { + return ((UINT8) (HexChar - 0x37)); + } + + return ((UINT8) (HexChar - 0x57)); +} + + +/******************************************************************************* + * + * FUNCTION: UtConvertByteToHex + * + * PARAMETERS: RawByte - Binary data + * Buffer - Pointer to where the hex bytes will be stored + * + * RETURN: Ascii hex byte is stored in Buffer. + * + * DESCRIPTION: Perform hex-to-ascii translation. The return data is prefixed + * with "0x" + * + ******************************************************************************/ + +void +UtConvertByteToHex ( + UINT8 RawByte, + UINT8 *Buffer) +{ + + Buffer[0] = '0'; + Buffer[1] = 'x'; + + Buffer[2] = (UINT8) HexLookup[(RawByte >> 4) & 0xF]; + Buffer[3] = (UINT8) HexLookup[RawByte & 0xF]; +} + + +/******************************************************************************* + * + * FUNCTION: UtConvertByteToAsmHex + * + * PARAMETERS: RawByte - Binary data + * Buffer - Pointer to where the hex bytes will be stored + * + * RETURN: Ascii hex byte is stored in Buffer. + * + * DESCRIPTION: Perform hex-to-ascii translation. The return data is prefixed + * with "0x" + * + ******************************************************************************/ + +void +UtConvertByteToAsmHex ( + UINT8 RawByte, + UINT8 *Buffer) +{ + + Buffer[0] = '0'; + Buffer[1] = (UINT8) HexLookup[(RawByte >> 4) & 0xF]; + Buffer[2] = (UINT8) HexLookup[RawByte & 0xF]; + Buffer[3] = 'h'; +} + + +/******************************************************************************* + * + * FUNCTION: DbgPrint + * + * PARAMETERS: Type - Type of output + * Fmt - Printf format string + * ... - variable printf list + * + * RETURN: None + * + * DESCRIPTION: Conditional print statement. Prints to stderr only if the + * debug flag is set. + * + ******************************************************************************/ + +void +DbgPrint ( + UINT32 Type, + char *Fmt, + ...) +{ + va_list Args; + + + va_start (Args, Fmt); + + if (!Gbl_DebugFlag) + { + return; + } + + if ((Type == ASL_PARSE_OUTPUT) && + (!(AslCompilerdebug))) + { + return; + } + + (void) vfprintf (stderr, Fmt, Args); + va_end (Args); + return; +} + + +/******************************************************************************* + * + * FUNCTION: UtPrintFormattedName + * + * PARAMETERS: ParseOpcode - Parser keyword ID + * Level - Indentation level + * + * RETURN: None + * + * DESCRIPTION: Print the ascii name of the parse opcode. + * + ******************************************************************************/ + +#define TEXT_OFFSET 10 + +void +UtPrintFormattedName ( + UINT16 ParseOpcode, + UINT32 Level) +{ + + if (Level) + { + DbgPrint (ASL_TREE_OUTPUT, + "%*s", (3 * Level), " "); + } + DbgPrint (ASL_TREE_OUTPUT, + " %-20.20s", UtGetOpName (ParseOpcode)); + + if (Level < TEXT_OFFSET) + { + DbgPrint (ASL_TREE_OUTPUT, + "%*s", (TEXT_OFFSET - Level) * 3, " "); + } +} + + +/******************************************************************************* + * + * FUNCTION: UtSetParseOpName + * + * PARAMETERS: Op + * + * RETURN: None + * + * DESCRIPTION: Insert the ascii name of the parse opcode + * + ******************************************************************************/ + +void +UtSetParseOpName ( + ACPI_PARSE_OBJECT *Op) +{ + + strncpy (Op->Asl.ParseOpName, UtGetOpName (Op->Asl.ParseOpcode), + ACPI_MAX_PARSEOP_NAME); +} + + +/******************************************************************************* + * + * FUNCTION: UtGetOpName + * + * PARAMETERS: ParseOpcode - Parser keyword ID + * + * RETURN: Pointer to the opcode name + * + * DESCRIPTION: Get the ascii name of the parse opcode + * + ******************************************************************************/ + +char * +UtGetOpName ( + UINT32 ParseOpcode) +{ + + /* + * First entries (ASL_YYTNAME_START) in yytname are special reserved names. + * Ignore first 8 characters of the name + */ + return ((char *) yytname + [(ParseOpcode - ASL_FIRST_PARSE_OPCODE) + ASL_YYTNAME_START] + 8); +} + + +/******************************************************************************* + * + * FUNCTION: UtDisplaySummary + * + * PARAMETERS: FileID - ID of outpout file + * + * RETURN: None + * + * DESCRIPTION: Display compilation statistics + * + ******************************************************************************/ + +void +UtDisplaySummary ( + UINT32 FileId) +{ + + if (FileId != ASL_FILE_STDOUT) + { + /* Compiler name and version number */ + + FlPrintFile (FileId, "%s version %X [%s]\n", + CompilerId, (UINT32) ACPI_CA_VERSION, __DATE__); + } + + /* Input/Output summary */ + + FlPrintFile (FileId, + "ASL Input: %s - %d lines, %d bytes, %d keywords\n", + Gbl_Files[ASL_FILE_INPUT].Filename, Gbl_CurrentLineNumber, + Gbl_InputByteCount, TotalKeywords); + + /* AML summary */ + + if ((Gbl_ExceptionCount[ASL_ERROR] == 0) || (Gbl_IgnoreErrors)) + { + FlPrintFile (FileId, + "AML Output: %s - %d bytes, %d named objects, %d executable opcodes\n\n", + Gbl_Files[ASL_FILE_AML_OUTPUT].Filename, Gbl_TableLength, + TotalNamedObjects, TotalExecutableOpcodes); + } + + /* Error summary */ + + FlPrintFile (FileId, + "Compilation complete. %d Errors, %d Warnings, %d Remarks, %d Optimizations\n", + Gbl_ExceptionCount[ASL_ERROR], + Gbl_ExceptionCount[ASL_WARNING] + + Gbl_ExceptionCount[ASL_WARNING2] + + Gbl_ExceptionCount[ASL_WARNING3], + Gbl_ExceptionCount[ASL_REMARK], + Gbl_ExceptionCount[ASL_OPTIMIZATION]); +} + + +/******************************************************************************* + * + * FUNCTION: UtDisplaySummary + * + * PARAMETERS: Op - Integer parse node + * LowValue - Smallest allowed value + * HighValue - Largest allowed value + * + * RETURN: Op if OK, otherwise NULL + * + * DESCRIPTION: Check integer for an allowable range + * + ******************************************************************************/ + +ACPI_PARSE_OBJECT * +UtCheckIntegerRange ( + ACPI_PARSE_OBJECT *Op, + UINT32 LowValue, + UINT32 HighValue) +{ + char *ParseError = NULL; + char Buffer[64]; + + + if (!Op) + { + return NULL; + } + + if (Op->Asl.Value.Integer < LowValue) + { + ParseError = "Value below valid range"; + Op->Asl.Value.Integer = LowValue; + } + + if (Op->Asl.Value.Integer > HighValue) + { + ParseError = "Value above valid range"; + Op->Asl.Value.Integer = HighValue; + } + + if (ParseError) + { + sprintf (Buffer, "%s 0x%X-0x%X", ParseError, LowValue, HighValue); + AslCompilererror (Buffer); + + return NULL; + } + + return Op; +} + + +/******************************************************************************* + * + * FUNCTION: UtGetStringBuffer + * + * PARAMETERS: Length - Size of buffer requested + * + * RETURN: Pointer to the buffer. Aborts on allocation failure + * + * DESCRIPTION: Allocate a string buffer. Bypass the local + * dynamic memory manager for performance reasons (This has a + * major impact on the speed of the compiler.) + * + ******************************************************************************/ + +char * +UtGetStringBuffer ( + UINT32 Length) +{ + char *Buffer; + + + if ((Gbl_StringCacheNext + Length) >= Gbl_StringCacheLast) + { + Gbl_StringCacheNext = UtLocalCalloc (ASL_STRING_CACHE_SIZE + Length); + Gbl_StringCacheLast = Gbl_StringCacheNext + ASL_STRING_CACHE_SIZE + + Length; + } + + Buffer = Gbl_StringCacheNext; + Gbl_StringCacheNext += Length; + + return (Buffer); +} + + +/******************************************************************************* + * + * FUNCTION: UtInternalizeName + * + * PARAMETERS: ExternalName - Name to convert + * ConvertedName - Where the converted name is returned + * + * RETURN: Status + * + * DESCRIPTION: Convert an external (ASL) name to an internal (AML) name + * + ******************************************************************************/ + +ACPI_STATUS +UtInternalizeName ( + char *ExternalName, + char **ConvertedName) +{ + ACPI_NAMESTRING_INFO Info; + ACPI_STATUS Status; + + + if (!ExternalName) + { + return (AE_OK); + } + + /* Get the length of the new internal name */ + + Info.ExternalName = ExternalName; + AcpiNsGetInternalNameLength (&Info); + + /* We need a segment to store the internal name */ + + Info.InternalName = UtGetStringBuffer (Info.Length); + if (!Info.InternalName) + { + return (AE_NO_MEMORY); + } + + /* Build the name */ + + Status = AcpiNsBuildInternalName (&Info); + if (ACPI_FAILURE (Status)) + { + return (Status); + } + + *ConvertedName = Info.InternalName; + return (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: UtPadNameWithUnderscores + * + * PARAMETERS: NameSeg - Input nameseg + * PaddedNameSeg - Output padded nameseg + * + * RETURN: Padded nameseg. + * + * DESCRIPTION: Pads a NameSeg with underscores if necessary to form a full + * ACPI_NAME. + * + ******************************************************************************/ + +static void +UtPadNameWithUnderscores ( + char *NameSeg, + char *PaddedNameSeg) +{ + UINT32 i; + + + for (i = 0; (i < ACPI_NAME_SIZE); i++) + { + if (*NameSeg) + { + *PaddedNameSeg = *NameSeg; + NameSeg++; + } + else + { + *PaddedNameSeg = '_'; + } + PaddedNameSeg++; + } +} + + +/******************************************************************************* + * + * FUNCTION: UtAttachNameseg + * + * PARAMETERS: Op - Parent parse node + * Name - Full ExternalName + * + * RETURN: None; Sets the NameSeg field in parent node + * + * DESCRIPTION: Extract the last nameseg of the ExternalName and store it + * in the NameSeg field of the Op. + * + ******************************************************************************/ + +static void +UtAttachNameseg ( + ACPI_PARSE_OBJECT *Op, + char *Name) +{ + char *NameSeg; + char PaddedNameSeg[4]; + + + if (!Name) + { + return; + } + + /* Look for the last dot in the namepath */ + + NameSeg = strrchr (Name, '.'); + if (NameSeg) + { + /* Found last dot, we have also found the final nameseg */ + + NameSeg++; + UtPadNameWithUnderscores (NameSeg, PaddedNameSeg); + } + else + { + /* No dots in the namepath, there is only a single nameseg. */ + /* Handle prefixes */ + + while ((*Name == '\\') || (*Name == '^')) + { + Name++; + } + + /* Remaing string should be one single nameseg */ + + UtPadNameWithUnderscores (Name, PaddedNameSeg); + } + + strncpy (Op->Asl.NameSeg, PaddedNameSeg, 4); +} + + +/******************************************************************************* + * + * FUNCTION: UtAttachNamepathToOwner + * + * PARAMETERS: Op - Parent parse node + * NameOp - Node that contains the name + * + * RETURN: Sets the ExternalName and Namepath in the parent node + * + * DESCRIPTION: Store the name in two forms in the parent node: The original + * (external) name, and the internalized name that is used within + * the ACPI namespace manager. + * + ******************************************************************************/ + +void +UtAttachNamepathToOwner ( + ACPI_PARSE_OBJECT *Op, + ACPI_PARSE_OBJECT *NameOp) +{ + ACPI_STATUS Status; + + + /* Full external path */ + + Op->Asl.ExternalName = NameOp->Asl.Value.String; + + /* Save the NameOp for possible error reporting later */ + + Op->Asl.ParentMethod = (void *) NameOp; + + /* Last nameseg of the path */ + + UtAttachNameseg (Op, Op->Asl.ExternalName); + + /* Create internalized path */ + + Status = UtInternalizeName (NameOp->Asl.Value.String, &Op->Asl.Namepath); + if (ACPI_FAILURE (Status)) + { + /* TBD: abort on no memory */ + } +} + + +/******************************************************************************* + * + * FUNCTION: UtDoConstant + * + * PARAMETERS: String - Hex, Octal, or Decimal string + * + * RETURN: Converted Integer + * + * DESCRIPTION: Convert a string to an integer. With error checking. + * + ******************************************************************************/ + +ACPI_INTEGER +UtDoConstant ( + char *String) +{ + ACPI_STATUS Status; + ACPI_INTEGER Converted; + char ErrBuf[64]; + + + Status = UtStrtoul64 (String, 0, &Converted); + if (ACPI_FAILURE (Status)) + { + sprintf (ErrBuf, "%s %s\n", "Conversion error:", + AcpiFormatException (Status)); + AslCompilererror (ErrBuf); + } + + return (Converted); +} + + +/* TBD: use version in ACPI CA main code base? */ + +/******************************************************************************* + * + * FUNCTION: UtStrtoul64 + * + * PARAMETERS: String - Null terminated string + * Terminater - Where a pointer to the terminating byte is + * returned + * Base - Radix of the string + * + * RETURN: Converted value + * + * DESCRIPTION: Convert a string into an unsigned value. + * + ******************************************************************************/ + +static ACPI_STATUS +UtStrtoul64 ( + char *String, + UINT32 Base, + ACPI_INTEGER *RetInteger) +{ + UINT32 Index; + UINT32 Sign; + ACPI_INTEGER ReturnValue = 0; + ACPI_STATUS Status = AE_OK; + + + *RetInteger = 0; + + switch (Base) + { + case 0: + case 8: + case 10: + case 16: + break; + + default: + /* + * The specified Base parameter is not in the domain of + * this function: + */ + return (AE_BAD_PARAMETER); + } + + /* Skip over any white space in the buffer: */ + + while (isspace (*String) || *String == '\t') + { + ++String; + } + + /* + * The buffer may contain an optional plus or minus sign. + * If it does, then skip over it but remember what is was: + */ + if (*String == '-') + { + Sign = NEGATIVE; + ++String; + } + else if (*String == '+') + { + ++String; + Sign = POSITIVE; + } + else + { + Sign = POSITIVE; + } + + /* + * If the input parameter Base is zero, then we need to + * determine if it is octal, decimal, or hexadecimal: + */ + if (Base == 0) + { + if (*String == '0') + { + if (tolower (*(++String)) == 'x') + { + Base = 16; + ++String; + } + else + { + Base = 8; + } + } + else + { + Base = 10; + } + } + + /* + * For octal and hexadecimal bases, skip over the leading + * 0 or 0x, if they are present. + */ + if (Base == 8 && *String == '0') + { + String++; + } + + if (Base == 16 && + *String == '0' && + tolower (*(++String)) == 'x') + { + String++; + } + + /* Main loop: convert the string to an unsigned long */ + + while (*String) + { + if (isdigit (*String)) + { + Index = ((UINT8) *String) - '0'; + } + else + { + Index = (UINT8) toupper (*String); + if (isupper ((char) Index)) + { + Index = Index - 'A' + 10; + } + else + { + goto ErrorExit; + } + } + + if (Index >= Base) + { + goto ErrorExit; + } + + /* Check to see if value is out of range: */ + + if (ReturnValue > ((ACPI_INTEGER_MAX - (ACPI_INTEGER) Index) / + (ACPI_INTEGER) Base)) + { + goto ErrorExit; + } + else + { + ReturnValue *= Base; + ReturnValue += Index; + } + + ++String; + } + + + /* If a minus sign was present, then "the conversion is negated": */ + + if (Sign == NEGATIVE) + { + ReturnValue = (ACPI_UINT32_MAX - ReturnValue) + 1; + } + + *RetInteger = ReturnValue; + return (Status); + + +ErrorExit: + switch (Base) + { + case 8: + Status = AE_BAD_OCTAL_CONSTANT; + break; + + case 10: + Status = AE_BAD_DECIMAL_CONSTANT; + break; + + case 16: + Status = AE_BAD_HEX_CONSTANT; + break; + + default: + /* Base validated above */ + break; + } + + return (Status); +} + + |
