Tools/CodeTools/TianoTools/Pccts/h/PBlackBox.h

   1 #ifndef PBLACKBOX_H
   2 #define PBLACKBOX_H
   3
   4 /*
   5  * SOFTWARE RIGHTS
   6  *
   7  * We reserve no LEGAL rights to the Purdue Compiler Construction Tool
   8  * Set (PCCTS) -- PCCTS is in the public domain.  An individual or
   9  * company may do whatever they wish with source code distributed with
  10  * PCCTS or the code generated by PCCTS, including the incorporation of
  11  * PCCTS, or its output, into commerical software.
  12  *
  13  * We encourage users to develop software with PCCTS.  However, we do ask
  14  * that credit is given to us for developing PCCTS.  By "credit",
  15  * we mean that if you incorporate our source code into one of your
  16  * programs (commercial product, research project, or otherwise) that you
  17  * acknowledge this fact somewhere in the documentation, research report,
  18  * etc...  If you like PCCTS and have developed a nice tool with the
  19  * output, please mention that you developed it using PCCTS.  In
  20  * addition, we ask that this header remain intact in our source code.
  21  * As long as these guidelines are kept, we expect to continue enhancing
  22  * this system and expect to make other tools available as they are
  23  * completed.
  24  *
  25  * ANTLR 1.33
  26  * Terence Parr
  27  * Parr Research Corporation
  28  * with Purdue University and AHPCRC, University of Minnesota
  29  * 1989-2000
  30  */
  31
  32 /* Completely rewritten by Chris Uzdavinis (chris@atdesk.com) for MR23 */
  33
  34 #include "pcctscfg.h"
  35
  36 #include "pccts_iostream.h"
  37
  38 PCCTS_NAMESPACE_STD
  39
  40 //  MR20 Added #include for "DLexerBase.h"
  41
  42 #include "DLexerBase.h"
  43
  44 //
  45 //  The default buffer size of the lexer is given by the
  46 //   second argument of the lexer's ctor.  It is optional
  47 //   and defaults to 2000
  48 //
  49
  50 template<class Lexer, class Parser, class Token>
  51 class DllExportPCCTS ParserBlackBox {
  52 private:
  53   // no copy construction allowed
  54   ParserBlackBox(ParserBlackBox const &);
  55
  56   // no copy assignment allowed
  57   ParserBlackBox & operator=(ParserBlackBox const &);
  58
  59 protected:
  60   DLGFileInput *in;
  61   Lexer *scan;
  62   _ANTLRTokenPtr tok;
  63   ANTLRTokenBuffer *pipe;
  64   Parser *_parser;
  65   FILE *file;
  66   int openByBlackBox;    /* MR21 Don't close what we haven't opened */
  67 public:
  68
  69   ParserBlackBox(FILE *f)
  70     : in(0)
  71     , scan(0)
  72     , tok(0)
  73     , pipe(0)
  74     , _parser(0)
  75     , file(0)
  76     , openByBlackBox(0)
  77   {
  78     if (f == NULL)
  79     {
  80       cerr << "invalid file pointer\n";
  81     }
  82     else
  83     {
  84       openByBlackBox = 0;     /* MR21a */
  85       file = f;
  86       in = new DLGFileInput(f);
  87       scan = new Lexer(in);
  88       pipe = new ANTLRTokenBuffer(scan);
  89       tok = new Token;
  90       scan->setToken(tok);
  91       _parser = new Parser(pipe);
  92       _parser->init();
  93     }
  94   }
  95   ParserBlackBox(char *fname)
  96     : in(0)
  97     , scan(0)
  98     , tok(0)
  99     , pipe(0)
 100     , _parser(0)
 101     , file(0)
 102     , openByBlackBox(0)
 103   {
 104     FILE *f = fopen(fname, "r");
 105     if ( f==NULL ) {
 106       openByBlackBox = 0;
 107       cerr << "cannot open " << fname << "\n"; return;
 108     }
 109     else {
 110       openByBlackBox = 1;
 111       file = f;
 112       in = new DLGFileInput(f);
 113       scan = new Lexer(in);
 114       pipe = new ANTLRTokenBuffer(scan);
 115       tok = new Token;
 116       scan->setToken(tok);
 117       _parser = new Parser(pipe);
 118       _parser->init();
 119     }
 120   }
 121
 122   ~ParserBlackBox()
 123   {
 124     delete in; delete scan; delete pipe; delete _parser; delete tok;
 125     if (1 == openByBlackBox) {
 126       fclose(file);
 127     }
 128   }
 129
 130   Parser *parser()         { return _parser; }
 131   Lexer  *getLexer()     { return scan; }
 132 };
 133
 134 #endif