diff options
Diffstat (limited to 'sys/contrib/dev/acpica/compiler/aslsupport.l')
| -rw-r--r-- | sys/contrib/dev/acpica/compiler/aslsupport.l | 1031 |
1 files changed, 1031 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/compiler/aslsupport.l b/sys/contrib/dev/acpica/compiler/aslsupport.l new file mode 100644 index 000000000000..a507e99b3327 --- /dev/null +++ b/sys/contrib/dev/acpica/compiler/aslsupport.l @@ -0,0 +1,1031 @@ +/****************************************************************************** + * + * Module Name: aslsupport.l - Flex/lex scanner C support routines. + * NOTE: Included into aslcompile.l, not compiled by itself. + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2021, 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. + * + *****************************************************************************/ + +/* Configuration */ + +#define ASL_SPACES_PER_TAB 4 + +#define ASL_NORMAL_CHAR 0 +#define ASL_ESCAPE_SEQUENCE 1 +#define ASL_OCTAL_CONSTANT 2 +#define ASL_HEX_CONSTANT 3 + + +void +yyerror (char const *s) +{ + + AcpiOsPrintf ("YYERROR: %s\n", s); +} + + +/******************************************************************************* + * + * FUNCTION: AslParserCleanup + * + * Used to delete the current buffer + * + ******************************************************************************/ + +void +AslParserCleanup ( + void) +{ + + yy_delete_buffer (YY_CURRENT_BUFFER); +} + + +/******************************************************************************* + * + * FUNCTION: AslDoLineDirective + * + * PARAMETERS: None. Uses input() to access current source code line + * + * RETURN: Updates global line number and filename + * + * DESCRIPTION: Handle #line directives emitted by the preprocessor. + * + * The #line directive is emitted by the preprocesser, and is used to + * pass through line numbers from the original source code file to the + * preprocessor output file (.i). This allows any compiler-generated + * error messages to be displayed with the correct line number. + * + ******************************************************************************/ + +static void +AslDoLineDirective ( + void) +{ + int c; + char *Token; + UINT32 LineNumber; + char *Filename; + UINT32 i; + + AslGbl_HasIncludeFiles = TRUE; + + /* Eat the entire line that contains the #line directive */ + + AslGbl_LineBufPtr = AslGbl_CurrentLineBuffer; + + while ((c = input()) != '\n' && c != EOF) + { + *AslGbl_LineBufPtr = (char) c; + AslGbl_LineBufPtr++; + } + *AslGbl_LineBufPtr = 0; + + /* First argument is the actual line number */ + + Token = strtok (AslGbl_CurrentLineBuffer, " "); + if (!Token) + { + goto ResetAndExit; + } + + /* First argument is the line number */ + + LineNumber = (UINT32) UtDoConstant (Token); + + /* Emit the appropriate number of newlines */ + + AslGbl_CurrentColumn = 0; + if (LineNumber > AslGbl_CurrentLineNumber) + { + for (i = 0; i < (LineNumber - AslGbl_CurrentLineNumber); i++) + { + FlWriteFile (ASL_FILE_SOURCE_OUTPUT, "\n", 1); + AslGbl_CurrentColumn++; + } + } + + FlSetLineNumber (LineNumber); + + /* Second argument is the optional filename (in double quotes) */ + + Token = strtok (NULL, " \""); + if (Token) + { + Filename = UtLocalCacheCalloc (strlen (Token) + 1); + strcpy (Filename, Token); + FlSetFilename (Filename); + } + + /* Third argument is not supported at this time */ + +ResetAndExit: + + /* Reset globals for a new line */ + + AslGbl_CurrentLineOffset += AslGbl_CurrentColumn; + AslGbl_CurrentColumn = 0; + AslGbl_LineBufPtr = AslGbl_CurrentLineBuffer; +} + + +/******************************************************************************* + * + * FUNCTION: AslPopInputFileStack + * + * PARAMETERS: None + * + * RETURN: 0 if a node was popped, -1 otherwise + * + * DESCRIPTION: Pop the top of the input file stack and point the parser to + * the saved parse buffer contained in the fnode. Also, set the + * global line counters to the saved values. This function is + * called when an include file reaches EOF. + * + ******************************************************************************/ + +int +AslPopInputFileStack ( + void) +{ + ASL_FILE_NODE *Fnode; + + + AslGbl_PreviousIncludeFilename = AslGbl_Files[ASL_FILE_INPUT].Filename; + Fnode = AslGbl_IncludeFileStack; + DbgPrint (ASL_PARSE_OUTPUT, + "\nPop InputFile Stack, Fnode %p\n", Fnode); + + DbgPrint (ASL_PARSE_OUTPUT, + "Include: Closing \"%s\"\n\n", AslGbl_Files[ASL_FILE_INPUT].Filename); + + if (!Fnode) + { + return (-1); + } + + /* Close the current include file */ + + fclose (yyin); + + /* Update the top-of-stack */ + + AslGbl_IncludeFileStack = Fnode->Next; + + /* Reset global line counter and filename */ + + AslGbl_Files[ASL_FILE_INPUT].Filename = Fnode->Filename; + AslGbl_CurrentLineNumber = Fnode->CurrentLineNumber; + + /* Point the parser to the popped file */ + + yy_delete_buffer (YY_CURRENT_BUFFER); + yy_switch_to_buffer (Fnode->State); + + /* All done with this node */ + + ACPI_FREE (Fnode); + return (0); +} + + +/******************************************************************************* + * + * FUNCTION: AslPushInputFileStack + * + * PARAMETERS: InputFile - Open file pointer + * Filename - Name of the file + * + * RETURN: None + * + * DESCRIPTION: Push the InputFile onto the file stack, and point the parser + * to this file. Called when an include file is successfully + * opened. + * + ******************************************************************************/ + +void +AslPushInputFileStack ( + FILE *InputFile, + char *Filename) +{ + ASL_FILE_NODE *Fnode; + YY_BUFFER_STATE State; + + + /* Save the current state in an Fnode */ + + Fnode = UtLocalCalloc (sizeof (ASL_FILE_NODE)); + + Fnode->File = yyin; + Fnode->Next = AslGbl_IncludeFileStack; + Fnode->State = YY_CURRENT_BUFFER; + Fnode->Filename = AslGbl_Files[ASL_FILE_INPUT].Filename; + Fnode->CurrentLineNumber = AslGbl_CurrentLineNumber; + + /* Push it on the stack */ + + AslGbl_IncludeFileStack = Fnode; + + /* Point the parser to this file */ + + State = yy_create_buffer (InputFile, YY_BUF_SIZE); + yy_switch_to_buffer (State); + + DbgPrint (ASL_PARSE_OUTPUT, + "\nPush InputFile Stack, returning %p\n\n", InputFile); + + /* Reset the global line count and filename */ + + AslGbl_Files[ASL_FILE_INPUT].Filename = + UtLocalCacheCalloc (strlen (Filename) + 1); + + strcpy (AslGbl_Files[ASL_FILE_INPUT].Filename, Filename); + + AslGbl_CurrentLineNumber = 1; + yyin = InputFile; + + /* converter: reset the comment state to STANDARD_COMMENT */ + + AslGbl_CommentState.CommentType = STANDARD_COMMENT; +} + + +/******************************************************************************* + * + * FUNCTION: AslResetCurrentLineBuffer + * + * PARAMETERS: None + * + * RETURN: None + * + * DESCRIPTION: Reset the Line Buffer to zero, increment global line numbers. + * + ******************************************************************************/ + +void +AslResetCurrentLineBuffer ( + void) +{ + + if (AslGbl_Files[ASL_FILE_SOURCE_OUTPUT].Handle) + { + FlWriteFile (ASL_FILE_SOURCE_OUTPUT, AslGbl_CurrentLineBuffer, + AslGbl_LineBufPtr - AslGbl_CurrentLineBuffer); + } + + AslGbl_CurrentLineOffset += AslGbl_CurrentColumn; + AslGbl_CurrentColumn = 0; + + AslGbl_CurrentLineNumber++; + AslGbl_LogicalLineNumber++; + AslGbl_LineBufPtr = AslGbl_CurrentLineBuffer; +} + + +/******************************************************************************* + * + * FUNCTION: AslInsertLineBuffer + * + * PARAMETERS: SourceChar - One char from the input ASL source file + * + * RETURN: None + * + * DESCRIPTION: Put one character of the source file into the temp line buffer + * + ******************************************************************************/ + +void +AslInsertLineBuffer ( + int SourceChar) +{ + UINT32 i; + UINT32 Count = 1; + + + if (SourceChar == EOF) + { + return; + } + + AslGbl_InputByteCount++; + + /* Handle tabs. Convert to spaces */ + + if (SourceChar == '\t') + { + SourceChar = ' '; + Count = ASL_SPACES_PER_TAB - + (AslGbl_CurrentColumn & (ASL_SPACES_PER_TAB-1)); + } + + for (i = 0; i < Count; i++) + { + AslGbl_CurrentColumn++; + + /* Insert the character into the line buffer */ + + *AslGbl_LineBufPtr = (UINT8) SourceChar; + AslGbl_LineBufPtr++; + + if (AslGbl_LineBufPtr > + (AslGbl_CurrentLineBuffer + (AslGbl_LineBufferSize - 1))) + { +#if 0 + /* + * Warning if we have split a long source line. + * <Probably overkill> + */ + sprintf (MsgBuffer, "Max %u", AslGbl_LineBufferSize); + AslCommonError (ASL_WARNING, ASL_MSG_LONG_LINE, + AslGbl_CurrentLineNumber, AslGbl_LogicalLineNumber, + AslGbl_CurrentLineOffset, AslGbl_CurrentColumn, + AslGbl_Files[ASL_FILE_INPUT].Filename, MsgBuffer); +#endif + + AslResetCurrentLineBuffer (); + } + else if (SourceChar == '\n') + { + /* End of line */ + + AslResetCurrentLineBuffer (); + } + + if (AcpiGbl_CaptureComments) + { + CvProcessCommentState ((char) SourceChar); + } + } +} + + +/******************************************************************************* + * + * FUNCTION: count + * + * PARAMETERS: yytext - Contains the matched keyword. + * Type - Keyword/Character type: + * 0 = anything except a keyword + * 1 = pseudo-keywords + * 2 = non-executable ASL keywords + * 3 = executable ASL keywords + * + * RETURN: None + * + * DESCRIPTION: Count keywords and put them into the line buffer + * + ******************************************************************************/ + +static void +count ( + int Type) +{ + char *p; + + + switch (Type) + { + case 2: + + ++AslGbl_TotalKeywords; + ++AslGbl_TotalNamedObjects; + ++AslGbl_FilesList->TotalKeywords; + ++AslGbl_FilesList->TotalNamedObjects; + break; + + case 3: + + ++AslGbl_TotalKeywords; + ++AslGbl_TotalExecutableOpcodes; + ++AslGbl_FilesList->TotalKeywords; + ++AslGbl_FilesList->TotalExecutableOpcodes; + break; + + default: + + break; + } + + for (p = yytext; *p != '\0'; p++) + { + AslInsertLineBuffer (*p); + *AslGbl_LineBufPtr = 0; + } +} + + +/******************************************************************************* + * + * FUNCTION: AslDoComment + * + * PARAMETERS: none + * + * RETURN: none + * + * DESCRIPTION: Process a standard comment. + * + ******************************************************************************/ + +static BOOLEAN +AslDoComment ( + void) +{ + int c; + int c1 = 0; + char *StringBuffer = AslGbl_MsgBuffer; + char *EndBuffer = AslGbl_MsgBuffer + ASL_MSG_BUFFER_SIZE; + ASL_COMMENT_STATE CurrentState = AslGbl_CommentState; /* to reference later on */ + + + AslInsertLineBuffer ('/'); + AslInsertLineBuffer ('*'); + if (AcpiGbl_CaptureComments && CurrentState.CaptureComments) + { + *StringBuffer = '/'; + ++StringBuffer; + *StringBuffer = '*'; + ++StringBuffer; + } + +loop: + + /* Eat chars until end-of-comment */ + + while (((c = input ()) != '*') && (c != EOF)) + { + AslInsertLineBuffer (c); + if (AcpiGbl_CaptureComments && CurrentState.CaptureComments) + { + *StringBuffer = (char) c; + ++StringBuffer; + } + c1 = c; + } + + if (c == EOF) + { + goto EarlyEOF; + } + + /* + * Check for nested comment -- can help catch cases where a previous + * comment was accidentally left unterminated + */ + if ((c1 == '/') && (c == '*')) + { + AslCommonError (ASL_WARNING, ASL_MSG_NESTED_COMMENT, + AslGbl_CurrentLineNumber, AslGbl_LogicalLineNumber, + AslGbl_InputByteCount, AslGbl_CurrentColumn, + AslGbl_Files[ASL_FILE_INPUT].Filename, NULL); + } + + /* Comment is closed only if the NEXT character is a slash */ + + AslInsertLineBuffer (c); + if (AcpiGbl_CaptureComments && CurrentState.CaptureComments) + { + *StringBuffer = (char) c; + ++StringBuffer; + } + + if (((c1 = input ()) != '/') && (c1 != EOF)) + { + unput (c1); + goto loop; + } + + if (c1 == EOF) + { + goto EarlyEOF; + } + if (StringBuffer > EndBuffer) + { + goto BufferOverflow; + } + + AslInsertLineBuffer (c1); + CvProcessComment (CurrentState, StringBuffer, c1); + return (TRUE); + + +EarlyEOF: + /* + * Premature End-Of-File + */ + AslCommonError (ASL_ERROR, ASL_MSG_EARLY_EOF, + AslGbl_CurrentLineNumber, AslGbl_LogicalLineNumber, + AslGbl_CurrentLineOffset, AslGbl_CurrentColumn, + AslGbl_Files[ASL_FILE_INPUT].Filename, NULL); + return (FALSE); + + +BufferOverflow: + + /* Comment was too long */ + + AslCommonError (ASL_ERROR, ASL_MSG_STRING_LENGTH, + AslGbl_CurrentLineNumber, AslGbl_LogicalLineNumber, + AslGbl_CurrentLineOffset, AslGbl_CurrentColumn, + AslGbl_Files[ASL_FILE_INPUT].Filename, "Max length 4096"); + return (FALSE); + +} + + +/******************************************************************************* + * + * FUNCTION: AslDoCommentType2 + * + * PARAMETERS: none + * + * RETURN: none + * + * DESCRIPTION: Process a new "//" comment. Inline comments will be converted + * to "/ *" standard comments. + * + ******************************************************************************/ + +static BOOLEAN +AslDoCommentType2 ( + void) +{ + int c; + char *StringBuffer = AslGbl_MsgBuffer; + char *EndBuffer = AslGbl_MsgBuffer + ASL_MSG_BUFFER_SIZE; + ASL_COMMENT_STATE CurrentState = AslGbl_CommentState; + + + AslInsertLineBuffer ('/'); + + if (AcpiGbl_CaptureComments && CurrentState.CaptureComments) + { + AslInsertLineBuffer ('*'); + *StringBuffer = '/'; + ++StringBuffer; + *StringBuffer = '*'; + ++StringBuffer; + } + else + { + AslInsertLineBuffer ('/'); + } + + while (((c = input ()) != '\n') && (c != EOF)) + { + AslInsertLineBuffer (c); + if (AcpiGbl_CaptureComments && CurrentState.CaptureComments) + { + *StringBuffer = (char) c; + ++StringBuffer; + } + } + + if (c == EOF) + { + /* End of file is OK, change to newline. Let parser detect EOF later */ + + c = '\n'; + } + + if (StringBuffer > EndBuffer) + { + goto BufferOverflow; + } + AslInsertLineBuffer (c); + + CvProcessCommentType2 (CurrentState, StringBuffer); + return (TRUE); + + +BufferOverflow: + + /* Comment was too long */ + + AslCommonError (ASL_ERROR, ASL_MSG_STRING_LENGTH, + AslGbl_CurrentLineNumber, AslGbl_LogicalLineNumber, + AslGbl_CurrentLineOffset, AslGbl_CurrentColumn, + AslGbl_Files[ASL_FILE_INPUT].Filename, "Max length 4096"); + return (FALSE); + +} + + +/******************************************************************************* + * + * FUNCTION: AslDoStringLiteral + * + * PARAMETERS: none + * + * RETURN: none + * + * DESCRIPTION: Process a string literal (surrounded by quotes) + * + ******************************************************************************/ + +static char +AslDoStringLiteral ( + void) +{ + char *StringBuffer = AslGbl_MsgBuffer; + char *EndBuffer = AslGbl_MsgBuffer + ASL_MSG_BUFFER_SIZE; + char *CleanString; + int StringChar; + UINT32 State = ASL_NORMAL_CHAR; + UINT32 i = 0; + UINT8 Digit; + char ConvertBuffer[4]; + + + /* + * Eat chars until end-of-literal. + * NOTE: Put back the original surrounding quotes into the + * source line buffer. + */ + AslInsertLineBuffer ('\"'); + while ((StringChar = input()) != EOF) + { + AslInsertLineBuffer (StringChar); + +DoCharacter: + switch (State) + { + case ASL_NORMAL_CHAR: + + switch (StringChar) + { + case '\\': + /* + * Special handling for backslash-escape sequence. We will + * toss the backslash and translate the escape char(s). + */ + State = ASL_ESCAPE_SEQUENCE; + continue; + + case '\"': + + /* String terminator */ + + goto CompletedString; + + default: + + break; + } + break; + + + case ASL_ESCAPE_SEQUENCE: + + State = ASL_NORMAL_CHAR; + switch (StringChar) + { + case 'a': + + StringChar = 0x07; /* BELL */ + break; + + case 'b': + + StringChar = 0x08; /* BACKSPACE */ + break; + + case 'f': + + StringChar = 0x0C; /* FORMFEED */ + break; + + case 'n': + + StringChar = 0x0A; /* LINEFEED */ + break; + + case 'r': + + StringChar = 0x0D; /* CARRIAGE RETURN*/ + break; + + case 't': + + StringChar = 0x09; /* HORIZONTAL TAB */ + break; + + case 'v': + + StringChar = 0x0B; /* VERTICAL TAB */ + break; + + case 'x': + + 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] = (char) StringChar; + i = 1; + continue; + } + + /* Unknown escape sequence issue warning, but use the character */ + + AslCommonError (ASL_WARNING, ASL_MSG_INVALID_ESCAPE, + AslGbl_CurrentLineNumber, AslGbl_LogicalLineNumber, + AslGbl_CurrentLineOffset, AslGbl_CurrentColumn, + AslGbl_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) 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, + AslGbl_CurrentLineNumber, AslGbl_LogicalLineNumber, + AslGbl_CurrentLineOffset, AslGbl_CurrentColumn, + AslGbl_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] = (char) StringChar; + i++; + continue; + + case ASL_HEX_CONSTANT: + + /* Up to two hex digits allowed */ + + if (!isxdigit (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) 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, + AslGbl_CurrentLineNumber, AslGbl_LogicalLineNumber, + AslGbl_CurrentLineOffset, AslGbl_CurrentColumn, + AslGbl_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] = (char) StringChar; + i++; + continue; + + default: + + break; + } + + /* Save the finished character */ + + *StringBuffer = (char) StringChar; + StringBuffer++; + if (StringBuffer >= EndBuffer) + { + goto BufferOverflow; + } + } + + /* + * Premature End-Of-File + */ + AslCommonError (ASL_ERROR, ASL_MSG_EARLY_EOF, + AslGbl_CurrentLineNumber, AslGbl_LogicalLineNumber, + AslGbl_CurrentLineOffset, AslGbl_CurrentColumn, + AslGbl_Files[ASL_FILE_INPUT].Filename, NULL); + return (FALSE); + + +CompletedString: + /* + * Null terminate the input string and copy string to a new buffer + */ + *StringBuffer = 0; + + CleanString = UtLocalCacheCalloc (strlen (AslGbl_MsgBuffer) + 1); + strcpy (CleanString, AslGbl_MsgBuffer); + AslCompilerlval.s = CleanString; + return (TRUE); + + +BufferOverflow: + + /* Literal was too long */ + + AslCommonError (ASL_ERROR, ASL_MSG_STRING_LENGTH, + AslGbl_CurrentLineNumber, AslGbl_LogicalLineNumber, + AslGbl_CurrentLineOffset, AslGbl_CurrentColumn, + AslGbl_Files[ASL_FILE_INPUT].Filename, "Max length 4096"); + return (FALSE); +} |