CMakeLua/Source/cmExprParserHelper.cxx

   1 /*=========================================================================
   2
   3   Program:   CMake - Cross-Platform Makefile Generator
   4   Module:    $RCSfile: cmExprParserHelper.cxx,v $
   5   Language:  C++
   6   Date:      $Date: 2006/05/11 14:45:28 $
   7   Version:   $Revision: 1.3 $
   8
   9   Copyright (c) 2002 Kitware, Inc., Insight Consortium.  All rights reserved.
  10   See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
  11
  12      This software is distributed WITHOUT ANY WARRANTY; without even
  13      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  14      PURPOSE.  See the above copyright notices for more information.
  15
  16 =========================================================================*/
  17 #include "cmExprParserHelper.h"
  18
  19 #include "cmSystemTools.h"
  20 #include "cmExprLexer.h"
  21
  22 #include "cmMakefile.h"
  23
  24 int cmExpr_yyparse( yyscan_t yyscanner );
  25 //
  26 cmExprParserHelper::cmExprParserHelper()
  27 {
  28   this->FileLine = -1;
  29   this->FileName = 0;
  30 }
  31
  32
  33 cmExprParserHelper::~cmExprParserHelper()
  34 {
  35   this->CleanupParser();
  36 }
  37
  38 void cmExprParserHelper::SetLineFile(long line, const char* file)
  39 {
  40   this->FileLine = line;
  41   this->FileName = file;
  42 }
  43
  44 int cmExprParserHelper::ParseString(const char* str, int verb)
  45 {
  46   if ( !str)
  47     {
  48     return 0;
  49     }
  50   //printf("Do some parsing: %s\n", str);
  51
  52   this->Verbose = verb;
  53   this->InputBuffer = str;
  54   this->InputBufferPos = 0;
  55   this->CurrentLine = 0;
  56
  57   this->Result = 0;
  58
  59   yyscan_t yyscanner;
  60   cmExpr_yylex_init(&yyscanner);
  61   cmExpr_yyset_extra(this, yyscanner);
  62   int res = cmExpr_yyparse(yyscanner);
  63   cmExpr_yylex_destroy(yyscanner);
  64   if ( res != 0 )
  65     {
  66     //str << "CAL_Parser returned: " << res << std::endl;
  67     //std::cerr << "When parsing: [" << str << "]" << std::endl;
  68     return 0;
  69     }
  70
  71   this->CleanupParser();
  72
  73   if ( Verbose )
  74     {
  75     std::cerr << "Expanding [" << str << "] produced: ["
  76               << this->Result << "]" << std::endl;
  77     }
  78   return 1;
  79 }
  80
  81 void cmExprParserHelper::CleanupParser()
  82 {
  83 }
  84
  85 int cmExprParserHelper::LexInput(char* buf, int maxlen)
  86 {
  87   //std::cout << "JPLexInput ";
  88   //std::cout.write(buf, maxlen);
  89   //std::cout << std::endl;
  90   if ( maxlen < 1 )
  91     {
  92     return 0;
  93     }
  94   if ( this->InputBufferPos < this->InputBuffer.size() )
  95     {
  96     buf[0] = this->InputBuffer[ this->InputBufferPos++ ];
  97     if ( buf[0] == '\n' )
  98       {
  99       this->CurrentLine ++;
 100       }
 101     return(1);
 102     }
 103   else
 104     {
 105     buf[0] = '\n';
 106     return( 0 );
 107     }
 108 }
 109
 110 void cmExprParserHelper::Error(const char* str)
 111 {
 112   unsigned long pos = static_cast<unsigned long>(this->InputBufferPos);
 113   cmOStringStream ostr;
 114   ostr << str << " (" << pos << ")";
 115   this->ErrorString = ostr.str();
 116 }
 117
 118 void cmExprParserHelper::SetResult(int value)
 119 {
 120   this->Result = value;
 121 }
 122
 123