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Diffstat (limited to 'source/compiler/prmacros.c')
| -rw-r--r-- | source/compiler/prmacros.c | 574 |
1 files changed, 574 insertions, 0 deletions
diff --git a/source/compiler/prmacros.c b/source/compiler/prmacros.c new file mode 100644 index 0000000..a5b6e4c --- /dev/null +++ b/source/compiler/prmacros.c @@ -0,0 +1,574 @@ +/****************************************************************************** + * + * Module Name: prmacros - Preprocessor #define macro support + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2012, Intel Corp. + * All rights reserved. + * + * 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. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * 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 MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES. + */ + +#include "aslcompiler.h" +#include "dtcompiler.h" + + +#define _COMPONENT ASL_PREPROCESSOR + ACPI_MODULE_NAME ("prmacros") + + +/******************************************************************************* + * + * FUNCTION: PrDumpPredefinedNames + * + * PARAMETERS: None + * + * RETURN: None + * + * DESCRIPTION: Dump the list of #defines. Used as the preprocessor starts, to + * display the names that were defined on the command line. + * Debug information only. + * + ******************************************************************************/ + +void +PrDumpPredefinedNames ( + void) +{ + PR_DEFINE_INFO *DefineInfo; + + + DefineInfo = Gbl_DefineList; + while (DefineInfo) + { + DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID + "Predefined #define: %s->%s\n", + 0, DefineInfo->Identifier, DefineInfo->Replacement); + + DefineInfo = DefineInfo->Next; + } +} + + +/******************************************************************************* + * + * FUNCTION: PrAddDefine + * + * PARAMETERS: Identifier - Name to be replaced + * Replacement - Replacement for Identifier + * Persist - Keep define across multiple compiles? + * + * RETURN: A new define_info struct. NULL on error. + * + * DESCRIPTION: Add a new #define to the global list + * + ******************************************************************************/ + +PR_DEFINE_INFO * +PrAddDefine ( + char *Identifier, + char *Replacement, + BOOLEAN Persist) +{ + char *IdentifierString; + char *ReplacementString; + PR_DEFINE_INFO *DefineInfo; + + + if (!Replacement) + { + Replacement = ""; + } + + /* Check for already-defined first */ + + DefineInfo = PrMatchDefine (Identifier); + if (DefineInfo) + { + DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID, + "#define: name already exists: %s\n", + Gbl_CurrentLineNumber, Identifier); + + /* + * Name already exists. This is only an error if the target name + * is different. + */ + if (strcmp (Replacement, DefineInfo->Replacement)) + { + PrError (ASL_ERROR, ASL_MSG_EXISTING_NAME, + THIS_TOKEN_OFFSET (Identifier)); + + return (NULL); + } + + return (DefineInfo); + } + + /* Copy input strings */ + + IdentifierString = UtLocalCalloc (strlen (Identifier) + 1); + strcpy (IdentifierString, Identifier); + + ReplacementString = UtLocalCalloc (strlen (Replacement) + 1); + strcpy (ReplacementString, Replacement); + + /* Init and link new define info struct */ + + DefineInfo = UtLocalCalloc (sizeof (PR_DEFINE_INFO)); + DefineInfo->Replacement = ReplacementString; + DefineInfo->Identifier = IdentifierString; + DefineInfo->Persist = Persist; + + if (Gbl_DefineList) + { + Gbl_DefineList->Previous = DefineInfo; + } + + DefineInfo->Next = Gbl_DefineList; + Gbl_DefineList = DefineInfo; + return (DefineInfo); +} + + +/******************************************************************************* + * + * FUNCTION: PrRemoveDefine + * + * PARAMETERS: DefineName - Name of define to be removed + * + * RETURN: None + * + * DESCRIPTION: Implements #undef. Remove a #define if found in the global + * list. No error if the target of the #undef does not exist, + * as per the C #undef definition. + * + ******************************************************************************/ + +void +PrRemoveDefine ( + char *DefineName) +{ + PR_DEFINE_INFO *DefineInfo; + + + /* Match name and delete the node */ + + DefineInfo = Gbl_DefineList; + while (DefineInfo) + { + if (!strcmp (DefineName, DefineInfo->Identifier)) + { + /* Remove from linked list */ + + if (DefineInfo->Previous) + { + (DefineInfo->Previous)->Next = DefineInfo->Next; + } + else + { + Gbl_DefineList = DefineInfo->Next; + } + + if (DefineInfo->Next) + { + (DefineInfo->Next)->Previous = DefineInfo->Previous; + } + + free (DefineInfo); + return; + } + + DefineInfo = DefineInfo->Next; + } + + /* + * Name was not found. By definition of #undef, this is not + * an error, however. + */ + DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID + "#undef: could not find %s\n", + Gbl_CurrentLineNumber, DefineName); +} + + +/******************************************************************************* + * + * FUNCTION: PrMatchDefine + * + * PARAMETERS: MatchString - Name associated with the #define + * + * RETURN: Matched string if found. NULL otherwise. + * + * DESCRIPTION: Find a name in global #define list + * + ******************************************************************************/ + +PR_DEFINE_INFO * +PrMatchDefine ( + char *MatchString) +{ + PR_DEFINE_INFO *DefineInfo; + + + DefineInfo = Gbl_DefineList; + while (DefineInfo) + { + if (!strcmp (MatchString, DefineInfo->Identifier)) + { + return (DefineInfo); + } + + DefineInfo = DefineInfo->Next; + } + + return (NULL); +} + + +/******************************************************************************* + * + * FUNCTION: PrAddMacro + * + * PARAMETERS: Name - Start of the macro definition + * Next - "Next" buffer from GetNextToken + * + * RETURN: None + * + * DESCRIPTION: Add a new macro to the list of #defines. Handles argument + * processing. + * + ******************************************************************************/ + +void +PrAddMacro ( + char *Name, + char **Next) +{ + char *Token = NULL; + ACPI_SIZE TokenOffset; + ACPI_SIZE MacroBodyOffset; + PR_DEFINE_INFO *DefineInfo; + PR_MACRO_ARG *Args; + char *Body; + char *BodyInSource; + UINT32 i; + UINT16 UseCount = 0; + UINT16 ArgCount = 0; + UINT32 Depth = 1; + UINT32 EndOfArgList; + char BufferChar; + + + /* Find the end of the arguments list */ + + TokenOffset = Name - Gbl_MainTokenBuffer + strlen (Name) + 1; + while (1) + { + BufferChar = Gbl_CurrentLineBuffer[TokenOffset]; + if (BufferChar == '(') + { + Depth++; + } + else if (BufferChar == ')') + { + Depth--; + } + else if (BufferChar == 0) + { + PrError (ASL_ERROR, ASL_MSG_MACRO_SYNTAX, TokenOffset); + return; + } + + if (Depth == 0) + { + /* Found arg list end */ + + EndOfArgList = TokenOffset; + break; + } + + TokenOffset++; + } + + /* At this point, we know that we have a reasonable argument list */ + + Args = UtLocalCalloc (sizeof (PR_MACRO_ARG) * PR_MAX_MACRO_ARGS); + + /* Get the macro argument names */ + + for (i = 0; i < PR_MAX_MACRO_ARGS; i++) + { + Token = PrGetNextToken (NULL, PR_MACRO_SEPARATORS, Next); + if (!Token) + { + /* This is the case for a NULL macro body */ + + BodyInSource = ""; + goto AddMacroToList; + } + + /* Don't go beyond the argument list */ + + TokenOffset = Token - Gbl_MainTokenBuffer + strlen (Token); + if (TokenOffset > EndOfArgList) + { + break; + } + + DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID + "Macro arg: %s \n", + Gbl_CurrentLineNumber, Token); + + Args[i].Name = UtLocalCalloc (strlen (Token) + 1); + strcpy (Args[i].Name, Token); + + Args[i].UseCount = 0; + + ArgCount++; + if (ArgCount >= PR_MAX_MACRO_ARGS) + { + PrError (ASL_ERROR, ASL_MSG_TOO_MANY_ARGUMENTS, TokenOffset); + return; + } + } + + /* Get the macro body. Token now points to start of body */ + + MacroBodyOffset = Token - Gbl_MainTokenBuffer; + + /* Match each method arg in the macro body for later use */ + + Token = PrGetNextToken (NULL, PR_MACRO_SEPARATORS, Next); + while (Token) + { + /* Search the macro arg list for matching arg */ + + for (i = 0; Args[i].Name && (i < PR_MAX_MACRO_ARGS); i++) + { + /* + * Save argument offset within macro body. This is the mechanism + * used to expand the macro upon invocation. + * + * Handles multiple instances of the same argument + */ + if (!strcmp (Token, Args[i].Name)) + { + UseCount = Args[i].UseCount; + + Args[i].Offset[UseCount] = (Token - Gbl_MainTokenBuffer) - MacroBodyOffset; + + DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID + "Macro Arg #%u: %s UseCount %u Offset %u \n", + Gbl_CurrentLineNumber, i, Token, + UseCount+1, Args[i].Offset[UseCount]); + + Args[i].UseCount++; + if (Args[i].UseCount >= PR_MAX_ARG_INSTANCES) + { + PrError (ASL_ERROR, ASL_MSG_TOO_MANY_ARGUMENTS, + THIS_TOKEN_OFFSET (Token)); + + return; + } + break; + } + } + + Token = PrGetNextToken (NULL, PR_MACRO_SEPARATORS, Next); + } + + BodyInSource = &Gbl_CurrentLineBuffer[MacroBodyOffset]; + + +AddMacroToList: + + /* Check if name is already defined first */ + + DefineInfo = PrMatchDefine (Name); + if (DefineInfo) + { + DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID + "#define: macro name already exists: %s\n", + Gbl_CurrentLineNumber, Name); + + /* Error only if not exactly the same macro */ + + if (strcmp (DefineInfo->Body, BodyInSource) || + (DefineInfo->ArgCount != ArgCount)) + { + PrError (ASL_ERROR, ASL_MSG_EXISTING_NAME, + THIS_TOKEN_OFFSET (Name)); + } + + return; + } + + DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID + "Macro body: %s \n", + Gbl_CurrentLineNumber, BodyInSource); + + /* Add macro to the #define list */ + + DefineInfo = PrAddDefine (Name, BodyInSource, FALSE); + if (DefineInfo) + { + Body = UtLocalCalloc (strlen (BodyInSource) + 1); + strcpy (Body, BodyInSource); + + DefineInfo->Body = Body; + DefineInfo->Args = Args; + DefineInfo->ArgCount = ArgCount; + } +} + + +/******************************************************************************* + * + * FUNCTION: PrDoMacroInvocation + * + * PARAMETERS: TokenBuffer - Current line buffer + * MacroStart - Start of the macro invocation within + * the token buffer + * DefineInfo - Info for this macro + * Next - "Next" buffer from GetNextToken + * + * RETURN: None + * + * DESCRIPTION: Expand a macro invocation + * + ******************************************************************************/ + +void +PrDoMacroInvocation ( + char *TokenBuffer, + char *MacroStart, + PR_DEFINE_INFO *DefineInfo, + char **Next) +{ + PR_MACRO_ARG *Args; + char *Token = NULL; + UINT32 TokenOffset; + UINT32 Length; + UINT32 i; + + + /* Take a copy of the macro body for expansion */ + + strcpy (Gbl_MacroTokenBuffer, DefineInfo->Body); + + /* Replace each argument within the prototype body */ + + Args = DefineInfo->Args; + if (!Args->Name) + { + /* This macro has no arguments */ + + Token = PrGetNextToken (NULL, PR_MACRO_ARGUMENTS, Next); + if (!Token) + { + goto BadInvocation; + } + + TokenOffset = (MacroStart - TokenBuffer); + Length = Token - MacroStart + strlen (Token) + 1; + + PrReplaceData ( + &Gbl_CurrentLineBuffer[TokenOffset], Length, + Gbl_MacroTokenBuffer, strlen (Gbl_MacroTokenBuffer)); + return; + } + + while (Args->Name) + { + /* Get the next argument from macro invocation */ + + Token = PrGetNextToken (NULL, PR_MACRO_SEPARATORS, Next); + if (!Token) + { + goto BadInvocation; + } + + /* Replace all instances of this argument */ + + for (i = 0; i < Args->UseCount; i++) + { + /* Offset zero indicates "arg not used" */ + /* TBD: Not really needed now, with UseCount available */ + + if (Args->Offset[i] == 0) + { + break; + } + + PrReplaceData ( + &Gbl_MacroTokenBuffer[Args->Offset[i]], strlen (Args->Name), + Token, strlen (Token)); + + DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID + "ExpandArg: %s \n", + Gbl_CurrentLineNumber, Gbl_MacroTokenBuffer); + } + + Args++; + } + + /* TBD: need to make sure macro was not invoked with too many arguments */ + + if (!Token) + { + return; + } + + /* Replace the entire macro invocation with the expanded macro */ + + TokenOffset = (MacroStart - TokenBuffer); + Length = Token - MacroStart + strlen (Token) + 1; + + PrReplaceData ( + &Gbl_CurrentLineBuffer[TokenOffset], Length, + Gbl_MacroTokenBuffer, strlen (Gbl_MacroTokenBuffer)); + + return; + + +BadInvocation: + PrError (ASL_ERROR, ASL_MSG_INVALID_INVOCATION, + THIS_TOKEN_OFFSET (MacroStart)); + + DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID + "Bad macro invocation: %s \n", + Gbl_CurrentLineNumber, Gbl_MacroTokenBuffer); + return; +} |
