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dt_stream_util.c

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#include "dt_stream_util.h"

#include "dt_stream_text.h"
#include "dt_stream_tree.h"
#include "dt_stream_validator.h"
#include "dt_node.h"

#include <stdio.h>


dt_bool dt_stream_transfer( dt_reader* src, dt_writer* dst )
{
   dt_stream_step step;
   while(  dt_read ( src, &step )  &&  dt_write( dst, &step )  )
      if( step.kind == dt_end )
         return 1;
   return 0;
}


dt_bool dt_stream_validated_transfer( dt_reader* src, dt_writer* dst )
{
   dt_writer* validator = dt_create_validator_writer( dst );
   dt_bool ans =     dt_stream_transfer( src, validator )
                  && dt_validator_writer_completed(validator);
   dt_free_writer( validator );
   return ans;
}


dt_node* dt_read_tree_from_file( const char* srcPath )
{
   dt_node* ans = 00;
   FILE* srcF = fopen(srcPath,"rb");
   if( srcF )
   {
      dt_reader* src = dt_create_text_reader( srcF, 0 );
      if( src )
      {
         dt_writer* treeMaker = dt_create_tree_writer( & ans );
         if( treeMaker )
         {
            if( ! dt_stream_validated_transfer( src, treeMaker ) )
            {
               dt_node_release( ans );
               ans = 0;
            }
            dt_free_writer(treeMaker);
         }
         dt_free_reader(src);
      }
      fclose(srcF);
   }
   return ans;
}


dt_bool dt_write_tree_to_file( dt_node const* root, const char* dstPath )
{
#ifdef _WIN32
   enum { defaultFormat = dt_text_crlf };
#else
   enum { defaultFormat = 0 };
#endif
   dt_bool ans = 0;
   FILE* dstF = fopen(dstPath,"wb");
   if( dstF )
   {
      dt_writer* dst = dt_create_text_writer( dstF, defaultFormat );
      if( dst )
      {
         ans = dt_stream_tree( root, dst );
         dt_free_writer(dst);
      }
      ans = ( 0==fclose(dstF) )  &&  ans;
   }
   return ans;
}

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