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+/***************************************************************************
+ *   Copyright (C) 2003 by Mike Buland                                     *
+ *   eichlan@Xagafinelle                                                   *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ ***************************************************************************/
+#ifndef TOKENSTRING_H
+#define TOKENSTRING_H
+
+#include "linkedlist.h"
+
+/** A single tokenized command line.  Contains all information necesarry to
+  * nicely access a stand-alone command line and to perform alias expansion
+  * inside of that command line.
+  * When expanding a token, the original command line is left intact, so any
+  * command usng a command line verbatum (getTokenString not getToken) will get
+  * the original, and not the expanded version.
+  * Since indexing into the original command line is also done by token, it
+  * means that using getTokenString( 0 ) will not always get you the first
+  * character of the command line, it will get you the first non-whitespace
+  * character.
+  * Furthermore, when expanding the expantion string is tokenized as well,
+  * but since the original string is unchanged, all tokens that expand any
+  * given index will all retain the same index into the original command line.
+  *@todo Update this to allow it to break on different types of token
+  * delimiters.
+  *@author Mike Buland
+  */
+class TokenString{
+public:
+        /** Automatically call parseLine when created.
+          *@param lpNewTokenString The command line to tokenize
+          *@author Mike Buland
+          */
+        TokenString( const char *lpNewTokenString=NULL );
+        ~TokenString();
+
+        /** Performs a tokenizing parse on the given command line, setting it as
+          * the internal command line for all future tokenizing (excluding
+          * expansion)
+          *@param lpNewTokenString The new command line to set to this object.
+          *@author Mike Buland
+          */
+        void parseLine( const char *lpNewTokenString );
+
+        /** Appends a token to the list of available tokens.  This references the
+          * internal pointer to the command line, so no token string must be
+          * specified.
+          *@param nStart The first character of the token to insert.
+          *@param nEnd The last character of the token to insert.
+          *@author Mike Buland
+          */
+        void appendToken( int nStart, int nEnd );
+
+        /** Gets the number of tokens.  This is particularly useful post-aliasing
+          * since the number of tokens may not match what is percieved from the
+          * original command line.
+          *@returns The number of available tokens.
+          *@author Mike Buland
+          */
+        int getNumTokens();
+
+        /** Gets a processed token specified by index.
+          *@param nIndex The index of the token to retrieve.
+          *@returns A pointer to the requested token.  Please note that these tokens
+          * may not match the original command line.
+          *@author Mike Buland
+          */
+        char *getToken( int nIndex );
+
+        /** Gets the original command line based on tokens.  Use this if you want
+          * to perform your own processing on parts of the command line, without
+          * resorting to tokens.
+          * The first character in the returned string will always be
+          * non-whitespace.
+          *@param nIndex The index of the token to start at, zero gets you the whole
+          * command line.
+          *@returns A pointer to the internal original command line string, starting
+          * at the position of the first non-whitespace character of the token
+          * specified.
+          *@author Mike Buland
+          */
+        char *getTokenString( int nIndex=0 );
+
+        /** Expands a token, replacing it with the string lpNewToken, but
+          * processing the new string for tokens before performing the replacement
+          *@param nIndex Which token should be replaced.
+          *@param lpNewToken The string to replace the token with.
+          *@author Mike Buland
+          */
+        void expandTokenTo( int nIndex, char *lpNewToken );
+
+        /** Inserts a token at any position in the command line.  This does not
+          * effect the original command line.
+          *@param nStart The start of the token in the string lpNewToken. (inclusive)
+          *@param nEnd The end of the token in the string lpToken. (inclusive)
+          *@param lpOldOrig The pointer to the position in the orginal command
+          * line where this new token should point.
+          *@param lpNewToken The string containing the new token.  May contain more
+          * than just one token.
+          *@param nIndex The position to insert the token to.
+          *@author Mike Buland
+          */
+        void insertToken( int nStart, int nEnd, char *lpOldOrig, const char *lpNewToken, int nIndex );
+
+private:
+        char *lpTokenString;
+        LinkedList lToken;
+
+        typedef struct Token
+        {
+                char *lpOrig;  // This is just a pointer back to lpTokenString
+                char *lpToken; // This is really a whole token
+        } Token;
+};
+
+#endif