ExtScanner (Ipfli4l13)

java.lang.Object
- pruefskript.scanner.ExtScanner

public class ExtScanner
extends java.lang.Object

Field Summary

Fields
Modifier and Type	Field and Description
`private ExtParser`	`parser`
`private int`	`yychar` the number of characters up to the start of the matched text
`private int`	`yycolumn` the number of characters from the last newline up to the start of the matched text
`static int`	`YYEOF` This character denotes the end of file
`static int`	`YYINITIAL` lexical states
`private int`	`yyline` number of newlines encountered up to the start of the matched text
`private static int[]`	`ZZ_ACTION` Translates DFA states to action switch labels.
`private static java.lang.String`	`ZZ_ACTION_PACKED_0`
`private static int[]`	`ZZ_ATTRIBUTE` ZZ_ATTRIBUTE[aState] contains the attributes of state `aState`
`private static java.lang.String`	`ZZ_ATTRIBUTE_PACKED_0`
`private static int`	`ZZ_BUFFERSIZE` initial size of the lookahead buffer
`private static char[]`	`ZZ_CMAP` Translates characters to character classes
`private static java.lang.String`	`ZZ_CMAP_PACKED` Translates characters to character classes
`private static java.lang.String[]`	`ZZ_ERROR_MSG`
`private static int[]`	`ZZ_LEXSTATE` ZZ_LEXSTATE[l] is the state in the DFA for the lexical state l ZZ_LEXSTATE[l+1] is the state in the DFA for the lexical state l at the beginning of a line l is of the form l = 2*k, k a non negative integer
`private static int`	`ZZ_NO_MATCH`
`private static int`	`ZZ_PUSHBACK_2BIG`
`private static int[]`	`ZZ_ROWMAP` Translates a state to a row index in the transition table
`private static java.lang.String`	`ZZ_ROWMAP_PACKED_0`
`private static int[]`	`ZZ_TRANS` The transition table of the DFA
`private static java.lang.String`	`ZZ_TRANS_PACKED_0`
`private static int`	`ZZ_UNKNOWN_ERROR`
`private boolean`	`zzAtBOL` zzAtBOL == true <=> the scanner is currently at the beginning of a line
`private boolean`	`zzAtEOF` zzAtEOF == true <=> the scanner is at the EOF
`private char[]`	`zzBuffer` this buffer contains the current text to be matched and is the source of the yytext() string
`private int`	`zzCurrentPos` the current text position in the buffer
`private int`	`zzEndRead` endRead marks the last character in the buffer, that has been read from input
`private boolean`	`zzEOFDone` denotes if the user-EOF-code has already been executed
`private int`	`zzFinalHighSurrogate` The number of occupied positions in zzBuffer beyond zzEndRead.
`private int`	`zzLexicalState` the current lexical state
`private int`	`zzMarkedPos` the textposition at the last accepting state
`private java.io.Reader`	`zzReader` the input device
`private int`	`zzStartRead` startRead marks the beginning of the yytext() string in the buffer
`private int`	`zzState` the current state of the DFA

Constructor Summary

Constructors
Constructor and Description

ExtScanner(java.io.Reader in)
Creates a new scanner

ExtScanner(java.io.Reader reader, ExtParser parser)

Constructors
Constructor and Description
`ExtScanner(java.io.Reader in)` Creates a new scanner
`ExtScanner(java.io.Reader reader, ExtParser parser)`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`int`	`next_token()` Resumes scanning until the next regular expression is matched, the end of input is encountered or an I/O-Error occurs.
`void`	`yybegin(int newState)` Enters a new lexical state
`char`	`yycharat(int pos)` Returns the character at position `pos` from the matched text.
`void`	`yyclose()` Closes the input stream.
`int`	`yylength()` Returns the length of the matched text region.
`void`	`yypushback(int number)` Pushes the specified amount of characters back into the input stream.
`void`	`yyreset(java.io.Reader reader)` Resets the scanner to read from a new input stream.
`int`	`yystate()` Returns the current lexical state.
`java.lang.String`	`yytext()` Returns the text matched by the current regular expression.
`private boolean`	`zzRefill()` Refills the input buffer.
`private void`	`zzScanError(int errorCode)` Reports an error that occured while scanning.
`private static int[]`	`zzUnpackAction()`
`private static int`	`zzUnpackAction(java.lang.String packed, int offset, int[] result)`
`private static int[]`	`zzUnpackAttribute()`
`private static int`	`zzUnpackAttribute(java.lang.String packed, int offset, int[] result)`
`private static char[]`	`zzUnpackCMap(java.lang.String packed)` Unpacks the compressed character translation table.
`private static int[]`	`zzUnpackRowMap()`
`private static int`	`zzUnpackRowMap(java.lang.String packed, int offset, int[] result)`
`private static int[]`	`zzUnpackTrans()`
`private static int`	`zzUnpackTrans(java.lang.String packed, int offset, int[] result)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - YYEOF
```
public static final int YYEOF
```
    This character denotes the end of file
    
    See Also:
    
    Constant Field Values
  - ZZ_BUFFERSIZE
```
private static final int ZZ_BUFFERSIZE
```
    initial size of the lookahead buffer
    
    See Also:
    
    Constant Field Values
  - YYINITIAL
```
public static final int YYINITIAL
```
    lexical states
    
    See Also:
    
    Constant Field Values
  - ZZ_LEXSTATE
```
private static final int[] ZZ_LEXSTATE
```
    ZZ_LEXSTATE[l] is the state in the DFA for the lexical state l ZZ_LEXSTATE[l+1] is the state in the DFA for the lexical state l at the beginning of a line l is of the form l = 2*k, k a non negative integer
  - ZZ_CMAP_PACKED
```
private static final java.lang.String ZZ_CMAP_PACKED
```
    Translates characters to character classes
    
    See Also:
    
    Constant Field Values
  - ZZ_CMAP
```
private static final char[] ZZ_CMAP
```
    Translates characters to character classes
  - ZZ_ACTION
```
private static final int[] ZZ_ACTION
```
    Translates DFA states to action switch labels.
  - ZZ_ACTION_PACKED_0
```
private static final java.lang.String ZZ_ACTION_PACKED_0
```
    See Also:
    
    Constant Field Values
  - ZZ_ROWMAP
```
private static final int[] ZZ_ROWMAP
```
    Translates a state to a row index in the transition table
  - ZZ_ROWMAP_PACKED_0
```
private static final java.lang.String ZZ_ROWMAP_PACKED_0
```
    See Also:
    
    Constant Field Values
  - ZZ_TRANS
```
private static final int[] ZZ_TRANS
```
    The transition table of the DFA
  - ZZ_TRANS_PACKED_0
```
private static final java.lang.String ZZ_TRANS_PACKED_0
```
    See Also:
    
    Constant Field Values
  - ZZ_UNKNOWN_ERROR
```
private static final int ZZ_UNKNOWN_ERROR
```
    See Also:
    
    Constant Field Values
  - ZZ_NO_MATCH
```
private static final int ZZ_NO_MATCH
```
    See Also:
    
    Constant Field Values
  - ZZ_PUSHBACK_2BIG
```
private static final int ZZ_PUSHBACK_2BIG
```
    See Also:
    
    Constant Field Values
  - ZZ_ERROR_MSG
```
private static final java.lang.String[] ZZ_ERROR_MSG
```
  - ZZ_ATTRIBUTE
```
private static final int[] ZZ_ATTRIBUTE
```
    ZZ_ATTRIBUTE[aState] contains the attributes of state aState
  - ZZ_ATTRIBUTE_PACKED_0
```
private static final java.lang.String ZZ_ATTRIBUTE_PACKED_0
```
    See Also:
    
    Constant Field Values
  - zzReader
```
private java.io.Reader zzReader
```
    the input device
  - zzState
```
private int zzState
```
    the current state of the DFA
  - zzLexicalState
```
private int zzLexicalState
```
    the current lexical state
  - zzBuffer
```
private char[] zzBuffer
```
    this buffer contains the current text to be matched and is the source of the yytext() string
  - zzMarkedPos
```
private int zzMarkedPos
```
    the textposition at the last accepting state
  - zzCurrentPos
```
private int zzCurrentPos
```
    the current text position in the buffer
  - zzStartRead
```
private int zzStartRead
```
    startRead marks the beginning of the yytext() string in the buffer
  - zzEndRead
```
private int zzEndRead
```
    endRead marks the last character in the buffer, that has been read from input
  - yyline
```
private int yyline
```
    number of newlines encountered up to the start of the matched text
  - yychar
```
private int yychar
```
    the number of characters up to the start of the matched text
  - yycolumn
```
private int yycolumn
```
    the number of characters from the last newline up to the start of the matched text
  - zzAtBOL
```
private boolean zzAtBOL
```
    zzAtBOL == true <=> the scanner is currently at the beginning of a line
  - zzAtEOF
```
private boolean zzAtEOF
```
    zzAtEOF == true <=> the scanner is at the EOF
  - zzEOFDone
```
private boolean zzEOFDone
```
    denotes if the user-EOF-code has already been executed
  - zzFinalHighSurrogate
```
private int zzFinalHighSurrogate
```
    The number of occupied positions in zzBuffer beyond zzEndRead. When a lead/high surrogate has been read from the input stream into the final zzBuffer position, this will have a value of 1; otherwise, it will have a value of 0.
  - parser
```
private ExtParser parser
```
- Constructor Detail
  - ExtScanner
```
public ExtScanner(java.io.Reader reader,
                  ExtParser parser)
```
  - ExtScanner
```
public ExtScanner(java.io.Reader in)
```
    Creates a new scanner
    
    Parameters:
    
    in - the java.io.Reader to read input from.
- Method Detail
  - zzUnpackAction
```
private static int[] zzUnpackAction()
```
  - zzUnpackAction
```
private static int zzUnpackAction(java.lang.String packed,
                                  int offset,
                                  int[] result)
```
  - zzUnpackRowMap
```
private static int[] zzUnpackRowMap()
```
  - zzUnpackRowMap
```
private static int zzUnpackRowMap(java.lang.String packed,
                                  int offset,
                                  int[] result)
```
  - zzUnpackTrans
```
private static int[] zzUnpackTrans()
```
  - zzUnpackTrans
```
private static int zzUnpackTrans(java.lang.String packed,
                                 int offset,
                                 int[] result)
```
  - zzUnpackAttribute
```
private static int[] zzUnpackAttribute()
```
  - zzUnpackAttribute
```
private static int zzUnpackAttribute(java.lang.String packed,
                                     int offset,
                                     int[] result)
```
  - zzUnpackCMap
```
private static char[] zzUnpackCMap(java.lang.String packed)
```
    Unpacks the compressed character translation table.
    
    Parameters:
    
    packed - the packed character translation table
    
    Returns:
    
    the unpacked character translation table
  - zzRefill
```
private boolean zzRefill()
                  throws java.io.IOException
```
    Refills the input buffer.
    
    Returns:
    
    false, iff there was new input.
    
    Throws:
    
    java.io.IOException - if any I/O-Error occurs
  - yyclose
```
public final void yyclose()
                   throws java.io.IOException
```
    Closes the input stream.
    
    Throws:
    
    java.io.IOException
  - yyreset
```
public final void yyreset(java.io.Reader reader)
```
    Resets the scanner to read from a new input stream. Does not close the old reader. All internal variables are reset, the old input stream cannot be reused (internal buffer is discarded and lost). Lexical state is set to ZZ_INITIAL. Internal scan buffer is resized down to its initial length, if it has grown.
    
    Parameters:
    
    reader - the new input stream
  - yystate
```
public final int yystate()
```
    Returns the current lexical state.
  - yybegin
```
public final void yybegin(int newState)
```
    Enters a new lexical state
    
    Parameters:
    
    newState - the new lexical state
  - yytext
```
public final java.lang.String yytext()
```
    Returns the text matched by the current regular expression.
  - yycharat
```
public final char yycharat(int pos)
```
    Returns the character at position pos from the matched text. It is equivalent to yytext().charAt(pos), but faster
    
    Parameters:
    
    pos - the position of the character to fetch. A value from 0 to yylength()-1.
    
    Returns:
    
    the character at position pos
  - yylength
```
public final int yylength()
```
    Returns the length of the matched text region.
  - zzScanError
```
private void zzScanError(int errorCode)
```
    Reports an error that occured while scanning. In a wellformed scanner (no or only correct usage of yypushback(int) and a match-all fallback rule) this method will only be called with things that "Can't Possibly Happen". If this method is called, something is seriously wrong (e.g. a JFlex bug producing a faulty scanner etc.). Usual syntax/scanner level error handling should be done in error fallback rules.
    
    Parameters:
    
    errorCode - the code of the errormessage to display
  - yypushback
```
public void yypushback(int number)
```
    Pushes the specified amount of characters back into the input stream. They will be read again by then next call of the scanning method
    
    Parameters:
    
    number - the number of characters to be read again. This number must not be greater than yylength()!
  - next_token
```
public int next_token()
               throws java.io.IOException
```
    Resumes scanning until the next regular expression is matched, the end of input is encountered or an I/O-Error occurs.
    
    Returns:
    
    the next token
    
    Throws:
    
    java.io.IOException - if any I/O-Error occurs

Class ExtScanner

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

YYEOF

ZZ_BUFFERSIZE

YYINITIAL

ZZ_LEXSTATE

ZZ_CMAP_PACKED

ZZ_CMAP

ZZ_ACTION

ZZ_ACTION_PACKED_0

ZZ_ROWMAP

ZZ_ROWMAP_PACKED_0

ZZ_TRANS

ZZ_TRANS_PACKED_0

ZZ_UNKNOWN_ERROR

ZZ_NO_MATCH

ZZ_PUSHBACK_2BIG

ZZ_ERROR_MSG

ZZ_ATTRIBUTE

ZZ_ATTRIBUTE_PACKED_0

zzReader

zzState

zzLexicalState

zzBuffer

zzMarkedPos

zzCurrentPos

zzStartRead

zzEndRead

yyline

yychar

yycolumn

zzAtBOL

zzAtEOF

zzEOFDone

zzFinalHighSurrogate

parser

Constructor Detail

ExtScanner

ExtScanner

Method Detail

zzUnpackAction

zzUnpackAction

zzUnpackRowMap

zzUnpackRowMap

zzUnpackTrans

zzUnpackTrans

zzUnpackAttribute

zzUnpackAttribute

zzUnpackCMap

zzRefill

yyclose

yyreset

yystate

yybegin

yytext

yycharat

yylength

zzScanError

yypushback

next_token