public class Assembler6502TokenMaker extends AbstractJFlexTokenMaker
This implementation was created using
JFlex 1.4.1; however, the generated file
was modified for performance. Memory allocation needs to be almost
completely removed to be competitive with the handwritten lexers (subclasses
of AbstractTokenMaker, so this class has been modified so that
Strings are never allocated (via yytext()), and the scanner never has to
worry about refilling its buffer (needlessly copying chars around).
We can achieve this because RText always scans exactly 1 line of tokens at a
time, and hands the scanner this line as an array of characters (a Segment
really). Since tokens contain pointers to char arrays instead of Strings
holding their contents, there is no need for allocating new memory for
Strings.
The actual algorithm generated for scanning has, of course, not been modified.
If you wish to regenerate this file yourself, keep in mind the following:
Assembler6502TokenMaker.java file will contain two
definitions of both zzRefill and yyreset.
You should hand-delete the second of each definition (the ones
generated by the lexer), as these generated methods modify the input
buffer, which we'll never have to do.yylex() on the generated scanner
directly; rather, you should use getTokenList as you would
with any other TokenMaker instance.| Modifier and Type | Field and Description |
|---|---|
static int |
EOL_COMMENT
lexical states
|
static int |
YYEOF
This character denotes the end of file
|
static int |
YYINITIAL |
offsetShift, s, startcurrentToken, firstToken, previousToken| Constructor and Description |
|---|
Assembler6502TokenMaker()
Constructor.
|
Assembler6502TokenMaker(java.io.InputStream in)
Creates a new scanner.
|
Assembler6502TokenMaker(java.io.Reader in)
Creates a new scanner
There is also a java.io.InputStream version of this constructor.
|
| Modifier and Type | Method and Description |
|---|---|
void |
addToken(char[] array,
int start,
int end,
int tokenType,
int startOffset)
Adds the token specified to the current linked list of tokens.
|
java.lang.String[] |
getLineCommentStartAndEnd(int languageIndex)
Returns the text to place at the beginning and end of a
line to "comment" it in this programming language.
|
Token |
getTokenList(javax.swing.text.Segment text,
int initialTokenType,
int startOffset)
Returns the first token in the linked list of tokens generated
from
text. |
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.
|
Token |
yylex()
Resumes scanning until the next regular expression is matched,
the end of input is encountered or an I/O-Error occurs.
|
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.
|
yybeginaddNullToken, addToken, addToken, createOccurrenceMarker, getClosestStandardTokenTypeForInternalType, getCurlyBracesDenoteCodeBlocks, getInsertBreakAction, getLanguageIndex, getLastTokenTypeOnLine, getMarkOccurrencesOfTokenType, getOccurrenceMarker, getShouldIndentNextLineAfter, isIdentifierChar, isMarkupLanguage, resetTokenList, setLanguageIndexpublic static final int YYEOF
public static final int EOL_COMMENT
public static final int YYINITIAL
public Assembler6502TokenMaker()
public Assembler6502TokenMaker(java.io.Reader in)
in - the java.io.Reader to read input from.public Assembler6502TokenMaker(java.io.InputStream in)
in - the java.io.Inputstream to read input from.public void addToken(char[] array,
int start,
int end,
int tokenType,
int startOffset)
addToken in interface TokenMakeraddToken in class TokenMakerBasearray - The character array.start - The starting offset in the array.end - The ending offset in the array.tokenType - The token's type.startOffset - The offset in the document at which this token
occurs.public java.lang.String[] getLineCommentStartAndEnd(int languageIndex)
TokenMakerBasegetLineCommentStartAndEnd in interface TokenMakergetLineCommentStartAndEnd in class TokenMakerBaselanguageIndex - The language index at the offset in question.
Since some TokenMakers effectively have nested
languages (such as JavaScript in HTML), this parameter tells the
TokenMaker what sub-language to look at.null value for either means there
is no string to add for that part. A value of
null for the array means this language
does not support commenting/uncommenting lines.public Token getTokenList(javax.swing.text.Segment text, int initialTokenType, int startOffset)
text. This method must be implemented by
subclasses so they can correctly implement syntax highlighting.text - The text from which to get tokens.initialTokenType - The token type we should start with.startOffset - The offset into the document at which
text starts.Token in a linked list representing
the syntax highlighted text.public final void yyreset(java.io.Reader reader)
reader - the new input streampublic final void yyclose()
throws java.io.IOException
java.io.IOExceptionpublic final int yystate()
public final void yybegin(int newState)
yybegin in class AbstractJFlexTokenMakernewState - the new lexical statepublic final java.lang.String yytext()
public final char yycharat(int pos)
pos - the position of the character to fetch.
A value from 0 to yylength()-1.public final int yylength()
public void yypushback(int number)
number - the number of characters to be read again.
This number must not be greater than yylength()!public Token yylex() throws java.io.IOException
java.io.IOException - if any I/O-Error occurs