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Diffstat (limited to 'source/compiler/aslsupport.l')
| -rw-r--r-- | source/compiler/aslsupport.l | 782 |
1 files changed, 782 insertions, 0 deletions
diff --git a/source/compiler/aslsupport.l b/source/compiler/aslsupport.l new file mode 100644 index 0000000..65dd19b --- /dev/null +++ b/source/compiler/aslsupport.l @@ -0,0 +1,782 @@ + +/****************************************************************************** + * + * Module Name: aslsupport.l - Flex/lex scanner C support routines. + * NOTE: Included into aslcompile.l, not compiled by itself. + * + *****************************************************************************/ + +/* + * 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. + */ + + +/* 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 + + +/* File node - used for "Include" operator file stack */ + +typedef struct asl_file_node +{ + FILE *File; + UINT32 CurrentLineNumber; + YY_BUFFER_STATE State; + char *Filename; + struct asl_file_node *Next; + +} ASL_FILE_NODE; + +/* File stack for the "Include" operator (NOT #include operator) */ + +ASL_FILE_NODE *Gbl_IncludeFileStack = NULL; + + +/******************************************************************************* + * + * 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) +{ + char c; + char *Token; + UINT32 LineNumber; + char *Filename; + + + /* Eat the entire line that contains the #line directive */ + + while ((c = (char) input()) != '\n' && c != EOF) + { + AslInsertLineBuffer (c); + } + AslInsertLineBuffer (0); + + /* First argument is the actual line number */ + + Token = strtok (Gbl_CurrentLineBuffer, " "); + if (!Token) + { + goto ResetAndExit; + } + + /* Convert line number. Subtract one to handle _this_ line */ + + LineNumber = (UINT32) UtDoConstant (Token); + FlSetLineNumber (LineNumber - 1); + + /* Second argument is the optional filename (in double quotes) */ + + Token = strtok (NULL, " \""); + if (Token) + { + Filename = ACPI_ALLOCATE_ZEROED (strlen (Token) + 1); + strcpy (Filename, Token); + FlSetFilename (Filename); + } + + /* Third argument is not supported at this time */ + +ResetAndExit: + AslResetCurrentLineBuffer (); +} + + +/******************************************************************************* + * + * 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; + + + Fnode = Gbl_IncludeFileStack; + DbgPrint (ASL_PARSE_OUTPUT, "\nPop InputFile Stack, Fnode %p\n\n", Fnode); + + if (!Fnode) + { + return (-1); + } + + /* Close the current include file */ + + fclose (yyin); + + /* Update the top-of-stack */ + + Gbl_IncludeFileStack = Fnode->Next; + + /* Reset global line counter and filename */ + + Gbl_Files[ASL_FILE_INPUT].Filename = Fnode->Filename; + Gbl_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 = Gbl_IncludeFileStack; + Fnode->State = YY_CURRENT_BUFFER; + Fnode->CurrentLineNumber = Gbl_CurrentLineNumber; + Fnode->Filename = Gbl_Files[ASL_FILE_INPUT].Filename; + + /* Push it on the stack */ + + Gbl_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 */ + + Gbl_Files[ASL_FILE_INPUT].Filename = Filename; + Gbl_CurrentLineNumber = 1; + yyin = InputFile; +} + + +/******************************************************************************* + * + * FUNCTION: AslResetCurrentLineBuffer + * + * PARAMETERS: None + * + * RETURN: None + * + * DESCRIPTION: Reset the Line Buffer to zero, increment global line numbers. + * + ******************************************************************************/ + +void +AslResetCurrentLineBuffer ( + void) +{ + + if (Gbl_Files[ASL_FILE_SOURCE_OUTPUT].Handle) + { + FlWriteFile (ASL_FILE_SOURCE_OUTPUT, Gbl_CurrentLineBuffer, + Gbl_LineBufPtr - Gbl_CurrentLineBuffer); + } + + Gbl_CurrentLineOffset += Gbl_CurrentColumn; + Gbl_CurrentColumn = 0; + + Gbl_CurrentLineNumber++; + Gbl_LogicalLineNumber++; + Gbl_LineBufPtr = Gbl_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; + } + + Gbl_InputByteCount++; + + /* Handle tabs. Convert to spaces */ + + if (SourceChar == '\t') + { + SourceChar = ' '; + Count = ASL_SPACES_PER_TAB - + (Gbl_CurrentColumn & (ASL_SPACES_PER_TAB-1)); + } + + for (i = 0; i < Count; i++) + { + Gbl_CurrentColumn++; + + /* Insert the character into the line buffer */ + + *Gbl_LineBufPtr = (UINT8) SourceChar; + Gbl_LineBufPtr++; + + if (Gbl_LineBufPtr > (Gbl_CurrentLineBuffer + (ASL_LINE_BUFFER_SIZE - 1))) + { +#if 0 + /* + * Warning if we have split a long source line. + * <Probably overkill> + */ + sprintf (MsgBuffer, "Max %u", ASL_LINE_BUFFER_SIZE); + AslCommonError (ASL_WARNING, ASL_MSG_LONG_LINE, + Gbl_CurrentLineNumber, Gbl_LogicalLineNumber, + Gbl_CurrentLineOffset, Gbl_CurrentColumn, + Gbl_Files[ASL_FILE_INPUT].Filename, MsgBuffer); +#endif + + AslResetCurrentLineBuffer (); + } + else if (SourceChar == '\n') + { + /* End of line */ + + AslResetCurrentLineBuffer (); + } + } +} + + +/******************************************************************************* + * + * 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) +{ + int i; + + + switch (Type) + { + case 2: + TotalKeywords++; + TotalNamedObjects++; + break; + + case 3: + TotalKeywords++; + TotalExecutableOpcodes++; + break; + } + + for (i = 0; (yytext[i] != 0) && (yytext[i] != EOF); i++) + { + AslInsertLineBuffer (yytext[i]); + *Gbl_LineBufPtr = 0; + } +} + + +/******************************************************************************* + * + * FUNCTION: AslDoComment + * + * PARAMETERS: none + * + * RETURN: none + * + * DESCRIPTION: Process a standard comment. + * + ******************************************************************************/ + +static char +AslDoComment ( + void) +{ + char c; + char c1 = 0; + + + AslInsertLineBuffer ('/'); + AslInsertLineBuffer ('*'); + +loop: + + /* Eat chars until end-of-comment */ + + while ((c = (char) input()) != '*' && c != EOF) + { + AslInsertLineBuffer (c); + c1 = c; + } + + if (c == EOF) + { + goto EarlyEOF; + } + + /* + * Check for nested comment -- can help catch cases where a previous + * comment was accidently left unterminated + */ + if ((c1 == '/') && (c == '*')) + { + AslCommonError (ASL_WARNING, ASL_MSG_NESTED_COMMENT, + Gbl_CurrentLineNumber, Gbl_LogicalLineNumber, + Gbl_InputByteCount, Gbl_CurrentColumn, + Gbl_Files[ASL_FILE_INPUT].Filename, NULL); + } + + /* Comment is closed only if the NEXT character is a slash */ + + AslInsertLineBuffer (c); + + if ((c1 = (char) input()) != '/' && c1 != EOF) + { + unput(c1); + goto loop; + } + + if (c1 == EOF) + { + goto EarlyEOF; + } + + AslInsertLineBuffer (c1); + return (TRUE); + + +EarlyEOF: + /* + * 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); +} + + +/******************************************************************************* + * + * FUNCTION: AslDoCommentType2 + * + * PARAMETERS: none + * + * RETURN: none + * + * DESCRIPTION: Process a new "//" comment. + * + ******************************************************************************/ + +static char +AslDoCommentType2 ( + void) +{ + char c; + + + AslInsertLineBuffer ('/'); + AslInsertLineBuffer ('/'); + + while ((c = (char) input()) != '\n' && c != EOF) + { + AslInsertLineBuffer (c); + } + + if (c == EOF) + { + /* End of file is OK, change to newline. Let parser detect EOF later */ + + c = '\n'; + } + + AslInsertLineBuffer (c); + return (TRUE); +} + + +/******************************************************************************* + * + * FUNCTION: AslDoStringLiteral + * + * PARAMETERS: none + * + * RETURN: none + * + * DESCRIPTION: Process a string literal (surrounded by quotes) + * + ******************************************************************************/ + +static char +AslDoStringLiteral ( + void) +{ + char *StringBuffer = MsgBuffer; + char *EndBuffer = MsgBuffer + ASL_MSG_BUFFER_SIZE; + char *CleanString; + char 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 = (char) 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; + } + 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] = 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); +} |
