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474 lines
11 KiB
Plaintext
474 lines
11 KiB
Plaintext
/*
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* 02/15/2005
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*
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* SQLTokenMaker.java - Scanner for SQL.
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*
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* This library is distributed under a modified BSD license. See the included
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* RSyntaxTextArea.License.txt file for details.
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*/
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package org.fife.ui.rsyntaxtextarea.modes;
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import java.io.*;
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import javax.swing.text.Segment;
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import org.fife.ui.rsyntaxtextarea.*;
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/**
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* This class generates tokens representing a text stream as SQL.<p>
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*
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* This implementation was created using
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* <a href="http://www.jflex.de/">JFlex</a> 1.4.1; however, the generated file
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* was modified for performance. Memory allocation needs to be almost
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* completely removed to be competitive with the handwritten lexers (subclasses
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* of <code>AbstractTokenMaker</code>, so this class has been modified so that
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* Strings are never allocated (via yytext()), and the scanner never has to
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* worry about refilling its buffer (needlessly copying chars around).
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* We can achieve this because RText always scans exactly 1 line of tokens at a
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* time, and hands the scanner this line as an array of characters (a Segment
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* really). Since tokens contain pointers to char arrays instead of Strings
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* holding their contents, there is no need for allocating new memory for
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* Strings.<p>
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*
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* The actual algorithm generated for scanning has, of course, not been
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* modified.<p>
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*
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* If you wish to regenerate this file yourself, keep in mind the following:
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* <ul>
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* <li>The generated <code>SQLTokenMaker.java</code> file will contain two
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* definitions of both <code>zzRefill</code> and <code>yyreset</code>.
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* You should hand-delete the second of each definition (the ones
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* generated by the lexer), as these generated methods modify the input
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* buffer, which we'll never have to do.</li>
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* <li>You should also change the declaration/definition of zzBuffer to NOT
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* be initialized. This is a needless memory allocation for us since we
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* will be pointing the array somewhere else anyway.</li>
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* <li>You should NOT call <code>yylex()</code> on the generated scanner
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* directly; rather, you should use <code>getTokenList</code> as you would
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* with any other <code>TokenMaker</code> instance.</li>
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* </ul>
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*
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* @author Robert Futrell
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* @version 0.5
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*
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*/
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%%
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%public
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%class SQLTokenMaker
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%extends AbstractJFlexTokenMaker
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%unicode
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%ignorecase
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%type org.fife.ui.rsyntaxtextarea.Token
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%{
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/**
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* Constructor. This must be here because JFlex does not generate a
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* no-parameter constructor.
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*/
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public SQLTokenMaker() {
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super();
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}
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/**
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* Adds the token specified to the current linked list of tokens.
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*
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* @param tokenType The token's type.
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*/
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private void addToken(int tokenType) {
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addToken(zzStartRead, zzMarkedPos-1, tokenType);
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}
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/**
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* Adds the token specified to the current linked list of tokens.
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*
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* @param tokenType The token's type.
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*/
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private void addToken(int start, int end, int tokenType) {
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int so = start + offsetShift;
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addToken(zzBuffer, start,end, tokenType, so);
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}
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/**
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* Adds the token specified to the current linked list of tokens.
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*
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* @param array The character array.
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* @param start The starting offset in the array.
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* @param end The ending offset in the array.
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* @param tokenType The token's type.
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* @param startOffset The offset in the document at which this token
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* occurs.
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*/
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@Override
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public void addToken(char[] array, int start, int end, int tokenType, int startOffset) {
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super.addToken(array, start,end, tokenType, startOffset);
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zzStartRead = zzMarkedPos;
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}
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/**
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* Overridden to return <code>true</code> so paren matching occurs for
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* SQL.
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*
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* @return <code>true</code> always.
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*/
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@Override
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public boolean getCurlyBracesDenoteCodeBlocks(int languageIndex) {
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return true;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public String[] getLineCommentStartAndEnd(int languageIndex) {
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return new String[] { "--", null };
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}
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/**
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* Returns the first token in the linked list of tokens generated
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* from <code>text</code>. This method must be implemented by
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* subclasses so they can correctly implement syntax highlighting.
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*
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* @param text The text from which to get tokens.
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* @param initialTokenType The token type we should start with.
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* @param startOffset The offset into the document at which
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* <code>text</code> starts.
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* @return The first <code>Token</code> in a linked list representing
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* the syntax highlighted text.
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*/
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public Token getTokenList(Segment text, int initialTokenType, int startOffset) {
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resetTokenList();
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this.offsetShift = -text.offset + startOffset;
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// Start off in the proper state.
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int state = Token.NULL;
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switch (initialTokenType) {
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case Token.LITERAL_STRING_DOUBLE_QUOTE:
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state = STRING;
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start = text.offset;
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break;
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case Token.LITERAL_CHAR:
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state = CHAR;
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start = text.offset;
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break;
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case Token.COMMENT_MULTILINE:
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state = MLC;
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start = text.offset;
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break;
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default:
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state = Token.NULL;
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}
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s = text;
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try {
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yyreset(zzReader);
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yybegin(state);
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return yylex();
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} catch (IOException ioe) {
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ioe.printStackTrace();
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return new TokenImpl();
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}
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}
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/**
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* Refills the input buffer.
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*
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* @return <code>true</code> if EOF was reached, otherwise
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* <code>false</code>.
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*/
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private boolean zzRefill() {
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return zzCurrentPos>=s.offset+s.count;
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}
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/**
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* Resets the scanner to read from a new input stream.
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* Does not close the old reader.
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*
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* All internal variables are reset, the old input stream
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* <b>cannot</b> be reused (internal buffer is discarded and lost).
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* Lexical state is set to <tt>YY_INITIAL</tt>.
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*
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* @param reader the new input stream
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*/
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public final void yyreset(java.io.Reader reader) {
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// 's' has been updated.
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zzBuffer = s.array;
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/*
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* We replaced the line below with the two below it because zzRefill
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* no longer "refills" the buffer (since the way we do it, it's always
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* "full" the first time through, since it points to the segment's
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* array). So, we assign zzEndRead here.
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*/
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//zzStartRead = zzEndRead = s.offset;
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zzStartRead = s.offset;
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zzEndRead = zzStartRead + s.count - 1;
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zzCurrentPos = zzMarkedPos = zzPushbackPos = s.offset;
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zzLexicalState = YYINITIAL;
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zzReader = reader;
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zzAtBOL = true;
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zzAtEOF = false;
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}
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%}
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LineTerminator = ([\n])
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Letter = ([A-Za-z])
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Digit = ([0-9])
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Whitespace = ([ \t]+)
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IdentifierStart = ({Letter})
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IdentifierPart = ({IdentifierStart}|{Digit}|[_])
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Identifier = ({IdentifierStart}{IdentifierPart}*)
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Operator = (">="|"<="|"<>"|">"|"<"|"="|"+"|"-"|"*"|"/")
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Separator = ([\(\)])
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Parameter = ([:]{Identifier})
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Integer = ({Digit}+)
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Float = (({Digit}+[.]{Digit}*)|([.]{Digit}*))
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ApproxNum = (({Digit}+[eE][+-]?{Digit}+)|({Digit}+[.]{Digit}*[eE][+-]?[0-9]+)|([.][0-9]*[eE][+-]?[0-9]+))
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CommentBegin = ("--")
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Comment = ({CommentBegin}.*)
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MLCBegin = "/*"
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MLCEnd = "*/"
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%state STRING
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%state CHAR
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%state MLC
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%%
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<YYINITIAL> {
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/* Keywords */
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"ADD" |
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"ALL" |
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"ALTER" |
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"AND" |
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"ANY" |
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"AS" |
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"ASC" |
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"AUTOINCREMENT" |
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"AVA" |
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"BETWEEN" |
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"BINARY" |
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"BIT" |
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"BOOLEAN" |
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"BY" |
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"BYTE" |
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"CHAR" |
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"CHARACTER" |
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"COLUMN" |
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"CONSTRAINT" |
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"COUNT" |
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"COUNTER" |
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"CREATE" |
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"CURRENCY" |
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"DATABASE" |
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"DATE" |
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"DATETIME" |
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"DELETE" |
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"DESC" |
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"DISALLOW" |
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"DISTINCT" |
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"DISTINCTROW" |
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"DOUBLE" |
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"DROP" |
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"EXISTS" |
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"FLOAT" |
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"FLOAT4" |
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"FLOAT8" |
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"FOREIGN" |
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"FROM" |
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"GENERAL" |
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"GROUP" |
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"GUID" |
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"HAVING" |
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"INNER" |
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"INSERT" |
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"IGNORE" |
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"IMP" |
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"IN" |
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"INDEX" |
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"INT" |
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"INTEGER" |
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"INTEGER1" |
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"INTEGER2" |
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"INTEGER4" |
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"INTO" |
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"IS" |
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"JOIN" |
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"KEY" |
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"LEFT" |
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"LEVEL" |
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"LIKE" |
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"LOGICAL" |
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"LONG" |
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"LONGBINARY" |
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"LONGTEXT" |
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"MAX" |
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"MEMO" |
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"MIN" |
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"MOD" |
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"MONEY" |
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"NOT" |
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"NULL" |
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"NUMBER" |
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"NUMERIC" |
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"OLEOBJECT" |
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"ON" |
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"OPTION" |
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"OR" |
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"ORDER" |
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"OUTER" |
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"OWNERACCESS" |
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"PARAMETERS" |
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"PASSWORD" |
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"PERCENT" |
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"PIVOT" |
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"PRIMARY" |
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"REAL" |
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"REFERENCES" |
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"RIGHT" |
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"SELECT" |
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"SET" |
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"SHORT" |
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"SINGLE" |
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"SMALLINT" |
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"SOME" |
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"STDEV" |
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"STDEVP" |
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"STRING" |
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"SUM" |
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"TABLE" |
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"TABLEID" |
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"TEXT" |
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"TIME" |
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"TIMESTAMP" |
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"TOP" |
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"TRANSFORM" |
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"TYPE" |
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"UNION" |
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"UNIQUE" |
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"UPDATE" |
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"USER" |
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"VALUE" |
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"VALUES" |
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"VAR" |
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"VARBINARY" |
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"VARCHAR" |
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"VARP" |
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"WHERE" |
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"WITH" |
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"YESNO" { addToken(Token.RESERVED_WORD); }
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/* SQL99 aggregate functions */
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"AVG" |
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"COUNT" |
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"MIN" |
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"MAX" |
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"SUM" { addToken(Token.FUNCTION); }
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/* SQL99 built-in scalar functions */
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"CURRENT_DATE" |
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"CURRENT_TIME" |
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"CURRENT_TIMESTAMP" |
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"CURRENT_USER" |
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"SESSION_USER" |
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"SYSTEM_USER" { addToken(Token.FUNCTION); }
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/* SQL99 numeric scalar functions */
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"BIT_LENGTH" |
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"CHAR_LENGTH" |
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"EXTRACT" |
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"OCTET_LENGTH" |
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"POSITION" { addToken(Token.FUNCTION); }
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/* SQL99 string functions */
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"CONCATENATE" |
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"CONVERT" |
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"LOWER" |
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"SUBSTRING" |
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"TRANSLATE" |
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"TRIM" |
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"UPPER" { addToken(Token.FUNCTION); }
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{LineTerminator} { addNullToken(); return firstToken; }
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{Identifier} { addToken(Token.IDENTIFIER); }
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";" { addToken(Token.IDENTIFIER); }
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{Parameter} { addToken(Token.IDENTIFIER); }
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{Comment} { addToken(Token.COMMENT_EOL); }
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{MLCBegin} { start = zzMarkedPos-2; yybegin(MLC); }
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{Whitespace} { addToken(Token.WHITESPACE); }
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{Operator} { addToken(Token.OPERATOR); }
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{Separator} { addToken(Token.SEPARATOR); }
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{Integer} { addToken(Token.LITERAL_NUMBER_DECIMAL_INT); }
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{Float} { addToken(Token.LITERAL_NUMBER_FLOAT); }
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{ApproxNum} { addToken(Token.LITERAL_NUMBER_FLOAT); }
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"\"" { start = zzMarkedPos-1; yybegin(STRING); }
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"\'" { start = zzMarkedPos-1; yybegin(CHAR); }
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"["[^\]]*"]" { addToken(Token.PREPROCESSOR); }
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"["[^\]]* { addToken(Token.ERROR_IDENTIFIER); addNullToken(); return firstToken; }
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<<EOF>> { addNullToken(); return firstToken; }
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/* Catch any other (unhandled) characters and flag them as OK; */
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/* I don't know enough about SQL to know what's really invalid. */
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. { addToken(Token.IDENTIFIER); }
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}
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<STRING> {
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[^\n\"]+ {}
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\n { addToken(start,zzStartRead-1, Token.LITERAL_STRING_DOUBLE_QUOTE); return firstToken; }
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"\"\"" {}
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"\"" { yybegin(YYINITIAL); addToken(start,zzStartRead, Token.LITERAL_STRING_DOUBLE_QUOTE); }
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<<EOF>> { addToken(start,zzStartRead-1, Token.LITERAL_STRING_DOUBLE_QUOTE); return firstToken; }
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}
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<CHAR> {
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[^\n\']+ {}
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\n { addToken(start,zzStartRead-1, Token.LITERAL_CHAR); return firstToken; }
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"\'\'" {}
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"\'" { yybegin(YYINITIAL); addToken(start,zzStartRead, Token.LITERAL_CHAR); }
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<<EOF>> { addToken(start,zzStartRead-1, Token.LITERAL_CHAR); return firstToken; }
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}
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<MLC> {
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[^\n\*]+ {}
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\n { addToken(start,zzStartRead-1, Token.COMMENT_MULTILINE); return firstToken; }
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{MLCEnd} { yybegin(YYINITIAL); addToken(start,zzStartRead+1, Token.COMMENT_MULTILINE); }
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\* {}
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<<EOF>> { addToken(start,zzStartRead-1, Token.COMMENT_MULTILINE); return firstToken; }
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}
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