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----------------------------------------------------------------------------

%parser XMLTable

%impl xmlreader.cpp

%token LEFT_ANGLE

%token RIGHT_ANGLE

%token ANY

%start XmlStream

/.

#ifndef XMLREADER_H

#define XMLREADER_H

#include <QtCore>

#include <cstdio>

#include <cstdlib>

#include <cstring>

#include "$header"

class XMLReader: protected $table

{

public:

    XMLReader(const QByteArray &bytes);

    ~XMLReader();

    bool parse();

    inline int nextToken()

    {

        switch (*bufptr++) {

        case '\0':

            return EOF_SYMBOL;

        case '<':

            in_tag = true;

            return LEFT_ANGLE;

        case '>':

            if (! in_tag)

                break;

            in_tag = false;

            return RIGHT_ANGLE;

            break;

        } // switch

        return ANY;

    }

protected:

    inline void reallocateStack();

    inline int &sym(int index)

    { return stack [tos + index - 1].ival; }

protected:

    int tos;

    int stack_size;

    struct StackItem {

        int state;

        int ival;

    };

    QVarLengthArray<StackItem> stack;

    unsigned in_tag: 1;

    QByteArray bytes;

    const char *bufptr;

};

inline void XMLReader::reallocateStack()

{

    if (! stack_size)

        stack_size = 128;

    else

        stack_size <<= 1;

    stack.resize (stack_size);

}

#endif // XMLREADER_H

XMLReader::XMLReader(const QByteArray &bytes):

    tos(0),

    stack_size(0),

    bytes(bytes)

{

    bufptr = bytes.constData();

}

XMLReader::~XMLReader()

{

}

bool XMLReader::parse()

{

  const int INITIAL_STATE = 0;

  in_tag = 0;

  bufptr = bytes.constData();

  int yytoken = -1;

  reallocateStack();

  tos = 0;

  stack [++tos].state = INITIAL_STATE;

  while (true)

    {

      const int state = stack [tos].state;

      if (yytoken == -1 && - TERMINAL_COUNT != action_index [state])

        yytoken = nextToken();

      int act = t_action (state, yytoken);

      if (act == ACCEPT_STATE)

        return true;

      else if (act > 0)

        {

          if (++tos == stack_size)

            reallocateStack();

          stack [tos].ival = *bufptr; // ### save the token value here

          stack [tos].state = act;

          yytoken = -1;

        }

      else if (act < 0)

        {

          int r = - act - 1;

          tos -= rhs [r];

          act = stack [tos++].state;

          switch (r) {

./

XmlStream: TagOrWord ;

XmlStream: XmlStream TagOrWord ;

TagOrWord: Tag ;

TagOrWord: ANY ;

Tag: LEFT_ANGLE TagName RIGHT_ANGLE ;

/.

    case $rule_number: {

        fprintf (stderr, "*** found a tag\n");

    } break;

./

TagName: ANY ;

TagName: TagName ANY ;

/.

          } // switch

          stack [tos].state = nt_action (act, lhs [r] - TERMINAL_COUNT);

        }

      else

        {

          // ### ERROR RECOVERY HERE

          break;

        }

    }

    return false;

}

/////////////////////////////

// entry point

/////////////////////////////

int main(int, char *argv[])

{

    QFile f (argv[1]);

    if (f.open(QFile::ReadOnly)) {

        QByteArray contents = f.readAll();

        XMLReader parser (contents);

        if (parser.parse())

            printf ("OK\n");

        else

            printf ("KO\n");

    }

}

./