804 lines
21 KiB
Plaintext
804 lines
21 KiB
Plaintext
/******************************************************************************
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*
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* Module Name: aslsupport.l - Flex/lex scanner C support routines.
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* NOTE: Included into aslcompile.l, not compiled by itself.
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2013, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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/* Configuration */
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#define ASL_SPACES_PER_TAB 4
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#define ASL_NORMAL_CHAR 0
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#define ASL_ESCAPE_SEQUENCE 1
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#define ASL_OCTAL_CONSTANT 2
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#define ASL_HEX_CONSTANT 3
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/* File node - used for "Include" operator file stack */
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typedef struct asl_file_node
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{
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FILE *File;
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UINT32 CurrentLineNumber;
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YY_BUFFER_STATE State;
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char *Filename;
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struct asl_file_node *Next;
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} ASL_FILE_NODE;
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/* File stack for the "Include" operator (NOT #include operator) */
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ASL_FILE_NODE *Gbl_IncludeFileStack = NULL;
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/*******************************************************************************
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*
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* FUNCTION: AslDoLineDirective
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*
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* PARAMETERS: None. Uses input() to access current source code line
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*
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* RETURN: Updates global line number and filename
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*
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* DESCRIPTION: Handle #line directives emitted by the preprocessor.
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*
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* The #line directive is emitted by the preprocesser, and is used to
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* pass through line numbers from the original source code file to the
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* preprocessor output file (.i). This allows any compiler-generated
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* error messages to be displayed with the correct line number.
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*
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******************************************************************************/
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static void
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AslDoLineDirective (
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void)
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{
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int c;
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char *Token;
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UINT32 LineNumber;
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char *Filename;
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UINT32 i;
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/* Eat the entire line that contains the #line directive */
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Gbl_LineBufPtr = Gbl_CurrentLineBuffer;
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while ((c = input()) != '\n' && c != EOF)
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{
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*Gbl_LineBufPtr = c;
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Gbl_LineBufPtr++;
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}
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*Gbl_LineBufPtr = 0;
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/* First argument is the actual line number */
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Token = strtok (Gbl_CurrentLineBuffer, " ");
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if (!Token)
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{
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goto ResetAndExit;
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}
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/* First argument is the line number */
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LineNumber = (UINT32) UtDoConstant (Token);
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/* Emit the appropriate number of newlines */
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Gbl_CurrentColumn = 0;
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if (LineNumber > Gbl_CurrentLineNumber)
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{
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for (i = 0; i < (LineNumber - Gbl_CurrentLineNumber); i++)
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{
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FlWriteFile (ASL_FILE_SOURCE_OUTPUT, "\n", 1);
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Gbl_CurrentColumn++;
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}
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}
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FlSetLineNumber (LineNumber);
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/* Second argument is the optional filename (in double quotes) */
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Token = strtok (NULL, " \"");
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if (Token)
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{
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Filename = ACPI_ALLOCATE_ZEROED (strlen (Token) + 1);
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strcpy (Filename, Token);
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FlSetFilename (Filename);
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}
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/* Third argument is not supported at this time */
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ResetAndExit:
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/* Reset globals for a new line */
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Gbl_CurrentLineOffset += Gbl_CurrentColumn;
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Gbl_CurrentColumn = 0;
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Gbl_LineBufPtr = Gbl_CurrentLineBuffer;
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}
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/*******************************************************************************
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*
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* FUNCTION: AslPopInputFileStack
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*
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* PARAMETERS: None
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*
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* RETURN: 0 if a node was popped, -1 otherwise
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*
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* DESCRIPTION: Pop the top of the input file stack and point the parser to
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* the saved parse buffer contained in the fnode. Also, set the
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* global line counters to the saved values. This function is
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* called when an include file reaches EOF.
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*
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******************************************************************************/
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int
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AslPopInputFileStack (
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void)
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{
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ASL_FILE_NODE *Fnode;
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Fnode = Gbl_IncludeFileStack;
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DbgPrint (ASL_PARSE_OUTPUT, "\nPop InputFile Stack, Fnode %p\n\n", Fnode);
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if (!Fnode)
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{
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return (-1);
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}
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/* Close the current include file */
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fclose (yyin);
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/* Update the top-of-stack */
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Gbl_IncludeFileStack = Fnode->Next;
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/* Reset global line counter and filename */
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Gbl_Files[ASL_FILE_INPUT].Filename = Fnode->Filename;
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Gbl_CurrentLineNumber = Fnode->CurrentLineNumber;
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/* Point the parser to the popped file */
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yy_delete_buffer (YY_CURRENT_BUFFER);
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yy_switch_to_buffer (Fnode->State);
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/* All done with this node */
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ACPI_FREE (Fnode);
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return (0);
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}
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/*******************************************************************************
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*
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* FUNCTION: AslPushInputFileStack
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*
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* PARAMETERS: InputFile - Open file pointer
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* Filename - Name of the file
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*
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* RETURN: None
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*
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* DESCRIPTION: Push the InputFile onto the file stack, and point the parser
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* to this file. Called when an include file is successfully
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* opened.
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*
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******************************************************************************/
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void
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AslPushInputFileStack (
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FILE *InputFile,
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char *Filename)
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{
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ASL_FILE_NODE *Fnode;
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YY_BUFFER_STATE State;
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/* Save the current state in an Fnode */
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Fnode = UtLocalCalloc (sizeof (ASL_FILE_NODE));
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Fnode->File = yyin;
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Fnode->Next = Gbl_IncludeFileStack;
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Fnode->State = YY_CURRENT_BUFFER;
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Fnode->CurrentLineNumber = Gbl_CurrentLineNumber;
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Fnode->Filename = Gbl_Files[ASL_FILE_INPUT].Filename;
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/* Push it on the stack */
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Gbl_IncludeFileStack = Fnode;
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/* Point the parser to this file */
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State = yy_create_buffer (InputFile, YY_BUF_SIZE);
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yy_switch_to_buffer (State);
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DbgPrint (ASL_PARSE_OUTPUT, "\nPush InputFile Stack, returning %p\n\n", InputFile);
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/* Reset the global line count and filename */
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Gbl_Files[ASL_FILE_INPUT].Filename = Filename;
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Gbl_CurrentLineNumber = 1;
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yyin = InputFile;
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}
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/*******************************************************************************
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*
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* FUNCTION: AslResetCurrentLineBuffer
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*
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* PARAMETERS: None
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*
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* RETURN: None
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*
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* DESCRIPTION: Reset the Line Buffer to zero, increment global line numbers.
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*
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******************************************************************************/
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void
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AslResetCurrentLineBuffer (
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void)
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{
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if (Gbl_Files[ASL_FILE_SOURCE_OUTPUT].Handle)
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{
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FlWriteFile (ASL_FILE_SOURCE_OUTPUT, Gbl_CurrentLineBuffer,
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Gbl_LineBufPtr - Gbl_CurrentLineBuffer);
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}
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Gbl_CurrentLineOffset += Gbl_CurrentColumn;
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Gbl_CurrentColumn = 0;
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Gbl_CurrentLineNumber++;
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Gbl_LogicalLineNumber++;
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Gbl_LineBufPtr = Gbl_CurrentLineBuffer;
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}
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/*******************************************************************************
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*
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* FUNCTION: AslInsertLineBuffer
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*
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* PARAMETERS: SourceChar - One char from the input ASL source file
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*
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* RETURN: None
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*
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* DESCRIPTION: Put one character of the source file into the temp line buffer
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*
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******************************************************************************/
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void
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AslInsertLineBuffer (
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int SourceChar)
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{
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UINT32 i;
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UINT32 Count = 1;
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if (SourceChar == EOF)
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{
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return;
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}
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Gbl_InputByteCount++;
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/* Handle tabs. Convert to spaces */
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if (SourceChar == '\t')
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{
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SourceChar = ' ';
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Count = ASL_SPACES_PER_TAB -
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(Gbl_CurrentColumn & (ASL_SPACES_PER_TAB-1));
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}
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for (i = 0; i < Count; i++)
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{
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Gbl_CurrentColumn++;
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/* Insert the character into the line buffer */
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*Gbl_LineBufPtr = (UINT8) SourceChar;
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Gbl_LineBufPtr++;
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if (Gbl_LineBufPtr > (Gbl_CurrentLineBuffer + (Gbl_LineBufferSize - 1)))
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{
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#if 0
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/*
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* Warning if we have split a long source line.
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* <Probably overkill>
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*/
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sprintf (MsgBuffer, "Max %u", Gbl_LineBufferSize);
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AslCommonError (ASL_WARNING, ASL_MSG_LONG_LINE,
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Gbl_CurrentLineNumber, Gbl_LogicalLineNumber,
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Gbl_CurrentLineOffset, Gbl_CurrentColumn,
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Gbl_Files[ASL_FILE_INPUT].Filename, MsgBuffer);
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#endif
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AslResetCurrentLineBuffer ();
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}
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else if (SourceChar == '\n')
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{
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/* End of line */
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AslResetCurrentLineBuffer ();
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}
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: count
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*
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* PARAMETERS: yytext - Contains the matched keyword.
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* Type - Keyword/Character type:
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* 0 = anything except a keyword
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* 1 = pseudo-keywords
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* 2 = non-executable ASL keywords
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* 3 = executable ASL keywords
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*
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* RETURN: None
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*
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* DESCRIPTION: Count keywords and put them into the line buffer
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*
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******************************************************************************/
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static void
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count (
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int Type)
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{
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int i;
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switch (Type)
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{
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case 2:
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TotalKeywords++;
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TotalNamedObjects++;
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break;
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case 3:
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TotalKeywords++;
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TotalExecutableOpcodes++;
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break;
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}
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for (i = 0; (yytext[i] != 0) && (yytext[i] != EOF); i++)
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{
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AslInsertLineBuffer (yytext[i]);
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*Gbl_LineBufPtr = 0;
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: AslDoComment
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*
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* PARAMETERS: none
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*
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* RETURN: none
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*
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* DESCRIPTION: Process a standard comment.
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*
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******************************************************************************/
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static char
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AslDoComment (
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void)
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{
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int c;
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int c1 = 0;
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AslInsertLineBuffer ('/');
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AslInsertLineBuffer ('*');
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loop:
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/* Eat chars until end-of-comment */
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while ((c = input()) != '*' && c != EOF)
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{
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AslInsertLineBuffer (c);
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c1 = c;
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}
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if (c == EOF)
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{
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goto EarlyEOF;
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}
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/*
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* Check for nested comment -- can help catch cases where a previous
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* comment was accidently left unterminated
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*/
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if ((c1 == '/') && (c == '*'))
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{
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AslCommonError (ASL_WARNING, ASL_MSG_NESTED_COMMENT,
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Gbl_CurrentLineNumber, Gbl_LogicalLineNumber,
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Gbl_InputByteCount, Gbl_CurrentColumn,
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Gbl_Files[ASL_FILE_INPUT].Filename, NULL);
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}
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/* Comment is closed only if the NEXT character is a slash */
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AslInsertLineBuffer (c);
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if ((c1 = input()) != '/' && c1 != EOF)
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{
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unput(c1);
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goto loop;
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}
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if (c1 == EOF)
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{
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goto EarlyEOF;
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}
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AslInsertLineBuffer (c1);
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return (TRUE);
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EarlyEOF:
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/*
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* Premature End-Of-File
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*/
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AslCommonError (ASL_ERROR, ASL_MSG_EARLY_EOF,
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Gbl_CurrentLineNumber, Gbl_LogicalLineNumber,
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Gbl_CurrentLineOffset, Gbl_CurrentColumn,
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Gbl_Files[ASL_FILE_INPUT].Filename, NULL);
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return (FALSE);
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}
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/*******************************************************************************
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*
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* FUNCTION: AslDoCommentType2
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*
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* PARAMETERS: none
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*
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* RETURN: none
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*
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* DESCRIPTION: Process a new "//" comment.
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*
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******************************************************************************/
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static char
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AslDoCommentType2 (
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void)
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{
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int c;
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AslInsertLineBuffer ('/');
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AslInsertLineBuffer ('/');
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while ((c = input()) != '\n' && c != EOF)
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{
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AslInsertLineBuffer (c);
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}
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if (c == EOF)
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{
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/* End of file is OK, change to newline. Let parser detect EOF later */
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c = '\n';
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}
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AslInsertLineBuffer (c);
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return (TRUE);
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}
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/*******************************************************************************
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*
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* FUNCTION: AslDoStringLiteral
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*
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* PARAMETERS: none
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*
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* RETURN: none
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*
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* DESCRIPTION: Process a string literal (surrounded by quotes)
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*
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******************************************************************************/
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static char
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AslDoStringLiteral (
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void)
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{
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char *StringBuffer = MsgBuffer;
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char *EndBuffer = MsgBuffer + ASL_MSG_BUFFER_SIZE;
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char *CleanString;
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int StringChar;
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UINT32 State = ASL_NORMAL_CHAR;
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UINT32 i = 0;
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UINT8 Digit;
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char ConvertBuffer[4];
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|
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/*
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* Eat chars until end-of-literal.
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* NOTE: Put back the original surrounding quotes into the
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* source line buffer.
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*/
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AslInsertLineBuffer ('\"');
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while ((StringChar = input()) != EOF)
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{
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AslInsertLineBuffer (StringChar);
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DoCharacter:
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switch (State)
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{
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case ASL_NORMAL_CHAR:
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switch (StringChar)
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{
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case '\\':
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/*
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* Special handling for backslash-escape sequence. We will
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* toss the backslash and translate the escape char(s).
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*/
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State = ASL_ESCAPE_SEQUENCE;
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continue;
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case '\"':
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/* String terminator */
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goto CompletedString;
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}
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break;
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case ASL_ESCAPE_SEQUENCE:
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State = ASL_NORMAL_CHAR;
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switch (StringChar)
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{
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case 'a':
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StringChar = 0x07; /* BELL */
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break;
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case 'b':
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StringChar = 0x08; /* BACKSPACE */
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break;
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case 'f':
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StringChar = 0x0C; /* FORMFEED */
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break;
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case 'n':
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StringChar = 0x0A; /* LINEFEED */
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break;
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case 'r':
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StringChar = 0x0D; /* CARRIAGE RETURN*/
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break;
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case 't':
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StringChar = 0x09; /* HORIZONTAL TAB */
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break;
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case 'v':
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StringChar = 0x0B; /* VERTICAL TAB */
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break;
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case 'x':
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State = ASL_HEX_CONSTANT;
|
|
i = 0;
|
|
continue;
|
|
|
|
case '\'': /* Single Quote */
|
|
case '\"': /* Double Quote */
|
|
case '\\': /* Backslash */
|
|
break;
|
|
|
|
default:
|
|
|
|
/* Check for an octal digit (0-7) */
|
|
|
|
if (ACPI_IS_OCTAL_DIGIT (StringChar))
|
|
{
|
|
State = ASL_OCTAL_CONSTANT;
|
|
ConvertBuffer[0] = StringChar;
|
|
i = 1;
|
|
continue;
|
|
}
|
|
|
|
/* Unknown escape sequence issue warning, but use the character */
|
|
|
|
AslCommonError (ASL_WARNING, ASL_MSG_INVALID_ESCAPE,
|
|
Gbl_CurrentLineNumber, Gbl_LogicalLineNumber,
|
|
Gbl_CurrentLineOffset, Gbl_CurrentColumn,
|
|
Gbl_Files[ASL_FILE_INPUT].Filename, NULL);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
|
|
case ASL_OCTAL_CONSTANT:
|
|
|
|
/* Up to three octal digits allowed */
|
|
|
|
if (!ACPI_IS_OCTAL_DIGIT (StringChar) ||
|
|
(i > 2))
|
|
{
|
|
/*
|
|
* Reached end of the constant. Convert the assembled ASCII
|
|
* string and resume processing of the next character
|
|
*/
|
|
ConvertBuffer[i] = 0;
|
|
Digit = (UINT8) ACPI_STRTOUL (ConvertBuffer, NULL, 8);
|
|
|
|
/* Check for NULL or non-ascii character (ignore if so) */
|
|
|
|
if ((Digit == 0) || (Digit > ACPI_ASCII_MAX))
|
|
{
|
|
AslCommonError (ASL_WARNING, ASL_MSG_INVALID_STRING,
|
|
Gbl_CurrentLineNumber, Gbl_LogicalLineNumber,
|
|
Gbl_CurrentLineOffset, Gbl_CurrentColumn,
|
|
Gbl_Files[ASL_FILE_INPUT].Filename, NULL);
|
|
}
|
|
else
|
|
{
|
|
*StringBuffer = (char) Digit;
|
|
StringBuffer++;
|
|
if (StringBuffer >= EndBuffer)
|
|
{
|
|
goto BufferOverflow;
|
|
}
|
|
}
|
|
|
|
State = ASL_NORMAL_CHAR;
|
|
goto DoCharacter;
|
|
break;
|
|
}
|
|
|
|
/* Append another digit of the constant */
|
|
|
|
ConvertBuffer[i] = StringChar;
|
|
i++;
|
|
continue;
|
|
|
|
|
|
case ASL_HEX_CONSTANT:
|
|
|
|
/* Up to two hex digits allowed */
|
|
|
|
if (!ACPI_IS_XDIGIT (StringChar) ||
|
|
(i > 1))
|
|
{
|
|
/*
|
|
* Reached end of the constant. Convert the assembled ASCII
|
|
* string and resume processing of the next character
|
|
*/
|
|
ConvertBuffer[i] = 0;
|
|
Digit = (UINT8) ACPI_STRTOUL (ConvertBuffer, NULL, 16);
|
|
|
|
/* Check for NULL or non-ascii character (ignore if so) */
|
|
|
|
if ((Digit == 0) || (Digit > ACPI_ASCII_MAX))
|
|
{
|
|
AslCommonError (ASL_WARNING, ASL_MSG_INVALID_STRING,
|
|
Gbl_CurrentLineNumber, Gbl_LogicalLineNumber,
|
|
Gbl_CurrentLineOffset, Gbl_CurrentColumn,
|
|
Gbl_Files[ASL_FILE_INPUT].Filename, NULL);
|
|
}
|
|
else
|
|
{
|
|
*StringBuffer = (char) Digit;
|
|
StringBuffer++;
|
|
if (StringBuffer >= EndBuffer)
|
|
{
|
|
goto BufferOverflow;
|
|
}
|
|
}
|
|
|
|
State = ASL_NORMAL_CHAR;
|
|
goto DoCharacter;
|
|
break;
|
|
}
|
|
|
|
/* Append another digit of the constant */
|
|
|
|
ConvertBuffer[i] = StringChar;
|
|
i++;
|
|
continue;
|
|
}
|
|
|
|
/* Save the finished character */
|
|
|
|
*StringBuffer = StringChar;
|
|
StringBuffer++;
|
|
if (StringBuffer >= EndBuffer)
|
|
{
|
|
goto BufferOverflow;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Premature End-Of-File
|
|
*/
|
|
AslCommonError (ASL_ERROR, ASL_MSG_EARLY_EOF,
|
|
Gbl_CurrentLineNumber, Gbl_LogicalLineNumber,
|
|
Gbl_CurrentLineOffset, Gbl_CurrentColumn,
|
|
Gbl_Files[ASL_FILE_INPUT].Filename, NULL);
|
|
return (FALSE);
|
|
|
|
|
|
CompletedString:
|
|
/*
|
|
* Null terminate the input string and copy string to a new buffer
|
|
*/
|
|
*StringBuffer = 0;
|
|
|
|
CleanString = UtGetStringBuffer (strlen (MsgBuffer) + 1);
|
|
if (!CleanString)
|
|
{
|
|
AslCommonError (ASL_ERROR, ASL_MSG_MEMORY_ALLOCATION,
|
|
Gbl_CurrentLineNumber, Gbl_LogicalLineNumber,
|
|
Gbl_CurrentLineOffset, Gbl_CurrentColumn,
|
|
Gbl_Files[ASL_FILE_INPUT].Filename, NULL);
|
|
return (FALSE);
|
|
}
|
|
|
|
ACPI_STRCPY (CleanString, MsgBuffer);
|
|
AslCompilerlval.s = CleanString;
|
|
return (TRUE);
|
|
|
|
|
|
BufferOverflow:
|
|
|
|
/* Literal was too long */
|
|
|
|
AslCommonError (ASL_ERROR, ASL_MSG_STRING_LENGTH,
|
|
Gbl_CurrentLineNumber, Gbl_LogicalLineNumber,
|
|
Gbl_CurrentLineOffset, Gbl_CurrentColumn,
|
|
Gbl_Files[ASL_FILE_INPUT].Filename, "Max length 4096");
|
|
return (FALSE);
|
|
}
|