q3bsp/fload.cpp at master · vlenhart/q3bsp · GitHub

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>


//############################################################################
//##                                                                        ##
//##  FLOAD.CPP                                                             ##
//##                                                                        ##
//##  Loads a file into a block of memory.                                  ##
//##                                                                        ##
//##  OpenSourced 12/5/2000 by John W. Ratcliff                             ##
//##                                                                        ##
//##  No warranty expressed or implied.                                     ##
//##                                                                        ##
//##  Part of the Q3BSP project, which converts a Quake 3 BSP file into a   ##
//##  polygon mesh.                                                         ##
//############################################################################
//##                                                                        ##
//##  Contact John W. Ratcliff at jratcliff@verant.com                      ##
//############################################################################

#include "fload.h"


Fload::Fload(const String& fname)
{
  mName = SGET( fname );
  mData = 0;
  mLen = 0;

  FILE *fph = fopen( mName, "rb");
  if ( fph )
  {
    fseek(fph, 0L, SEEK_END);
    mLen = ftell(fph);
    if ( mLen )
    {
      fseek(fph, 0L, SEEK_SET);
      mData = (void *) new unsigned char[mLen+1];
      assert( mData );
      if ( mData )
      {
        int r = fread(mData, mLen, 1, fph);
        assert( r );
        if ( !r )
        {
          delete (char *) mData;
          mData = 0;
        }
		((char *)mData)[mLen]=0;
      }
    }
    fclose(fph);
  }
  mReadLoc = (char *)mData;
  mReadLen = mLen;
}

Fload::~Fload(void)
{
  delete (char *) mData;
}


char * Fload::GetString(void)
{
  if ( !mReadLoc )
  {
    return 0;
  }

  // now advance read pointer to end of string and stomp a zero
  // byte on top of it as a null string terminator.
  while ( *mReadLoc == 0 || *mReadLoc == 10 || *mReadLoc == 13 )
  {
    mReadLoc++;
    mReadLen--;
    if ( !mReadLen )
    {
      mReadLoc = 0;
      return 0;
    }
  }

  char *ret = mReadLoc; // current read location is string location

  while ( *mReadLoc && *mReadLoc != 10 && *mReadLoc != 13 )
  {
    mReadLoc++;
    mReadLen--;
    if ( !mReadLen )
    {
      mReadLoc = 0;
      break;
    }
  }

  if ( mReadLen ) *mReadLoc = 0; // replace line feeds with null terminated strings.

  if ( mReadLoc ) mReadLoc++;
  mReadLen--;

  if ( !mReadLen )
  {
    mReadLoc = 0;
  }
  return ret;
}