ossimAuxFileHandler Class Reference

#include <ossimAuxFileHandler.h>

Public Member Functions
	ossimAuxFileHandler ()
virtual	~ossimAuxFileHandler ()
bool	isAuxFile (const ossimFilename &file)
	.aux file More...
bool	open (const ossimFilename &file)
	the file for reading More...
const ossimString &	getProjectionName () const
	Reads a single record from a aux file. More...
const ossimString &	getDatumName () const
const ossimString &	getUnitType () const

Private Attributes
ossimAuxInfo *	m_auxInfo
ossimString	m_projName
ossimString	m_datumName
ossimString	m_unitsType

Detailed Description

Definition at line 195 of file ossimAuxFileHandler.h.

Constructor & Destructor Documentation

ossimAuxFileHandler()

ossimAuxFileHandler::ossimAuxFileHandler

(

)

Definition at line 110 of file ossimAuxFileHandler.cpp.

{
  m_auxInfo = NULL;
}

~ossimAuxFileHandler()

ossimAuxFileHandler::~ossimAuxFileHandler ( )

virtual

Definition at line 115 of file ossimAuxFileHandler.cpp.

{
  if (m_auxInfo != NULL)
  {
    delete m_auxInfo;
    m_auxInfo = 0;
  }
}

Member Function Documentation

getDatumName()

const ossimString& ossimAuxFileHandler::getDatumName ( ) const

inline

Definition at line 218 of file ossimAuxFileHandler.h.

Referenced by ossimMrSidReader::getGeoProjection().

{ return m_datumName; }

getProjectionName()

const ossimString& ossimAuxFileHandler::getProjectionName ( ) const

inline

Reads a single record from a aux file.

Returns true if succesful. Returns false if EOF or error.

Definition at line 216 of file ossimAuxFileHandler.h.

Referenced by ossimMrSidReader::getGeoProjection().

{ return m_projName; }

getUnitType()

const ossimString& ossimAuxFileHandler::getUnitType ( ) const

inline

Definition at line 220 of file ossimAuxFileHandler.h.

Referenced by ossimMrSidReader::getGeoProjection().

{ return m_unitsType; }

isAuxFile()

bool ossimAuxFileHandler::isAuxFile

(

const ossimFilename &

file

)

.aux file

Definition at line 124 of file ossimAuxFileHandler.cpp.

References ossimString::downcase(), ossimFilename::exists(), and ossimFilename::ext().

{
  bool result = false;

  if ( file.exists() )
  { 
    ossimString ext = file.ext();
    ext.downcase();
    if (ext == "aux")
    {
      result = true;
    }
    else
    {
      result = false;
    } 
  } 

  return result;
}

open()

bool ossimAuxFileHandler::open

(

const ossimFilename &

file

)

the file for reading

Definition at line 145 of file ossimAuxFileHandler.cpp.

References ossimString::c_str().

Referenced by ossimMrSidReader::getGeoProjection().

{
   FILE *fp = fopen(file.c_str(), "r");
   char header[16];
   ossim_uint32 nHeaderPos;

   if( fp == NULL )
   {
      return false;
   }

   fread( header, 16, 1, fp);
  
   char* tmpHeader = const_cast<char*>(header);
   if(strcmp(tmpHeader,"EHFA_HEADER_TAG") != 0)
   {
      fclose( fp );
      return false;
   }

   //Create the ossimAuxInfo                                          
   m_auxInfo = new ossimAuxInfo();
   m_auxInfo->fp = fp;
 
   //Where is the header?                       
   fread( &nHeaderPos, sizeof(ossim_int32), 1, fp );

   fseek( fp, nHeaderPos, SEEK_SET );

   fread( &(m_auxInfo->nVersion), sizeof(ossim_int32), 1, fp );
 
   fread( header, 4, 1, fp ); /* skip freeList */

   fread( &(m_auxInfo->nRootPos), sizeof(ossim_int32), 1, fp );
 
   fread( &(m_auxInfo->nEntryHeaderLength), sizeof(ossim_int16), 1, fp );
   fread( &(m_auxInfo->nDictionaryPos), sizeof(ossim_int32), 1, fp );
  
   fseek( fp, 0, SEEK_END );
   m_auxInfo->nEndOfFile = (ossim_int32) ftell(fp);

   m_auxInfo->m_Root = new ossimAuxEntry( m_auxInfo, m_auxInfo->nRootPos, NULL, NULL );

   m_auxInfo->dictionaryData = ossimAuxGetDictionary(m_auxInfo);
   m_auxInfo->m_Dictionary = new ossimAuxDictionary( m_auxInfo->dictionaryData );

   ossimAuxEntry    *node = m_auxInfo->m_Root->getChild();
   while( node != NULL )
   {
      std::string typeStr = node->getType();
      size_t typeLen = typeStr.length();
      std::string str = "Eimg_Layer";
      size_t strLen = str.length();
      if( typeLen == strLen)
      {
         ossimAuxEntry* projEntry = node->getNamedChild("Map_Info");
         if( projEntry == NULL )
         {
            ossimAuxEntry* childEntry;
            for( childEntry = node->getChild(); childEntry != NULL && projEntry == NULL; childEntry = childEntry->getNext() )
            {
               if (ossimString(childEntry->getType()) == "Eprj_MapInfo")
                  projEntry = childEntry;
            }
         }

         const char* proj = NULL;
         const char* units = NULL;
         if (projEntry)
         {
            proj = projEntry->getStringField("proName");
            units = projEntry->getStringField("units");
         }
      
         if (proj != NULL)
         {
            m_projName = ossimString(proj);
         }
         if (units != NULL)
         {
            m_unitsType = ossimString(proj);
         }

         ossimAuxEntry* datumEntry = node->getNamedChild( "Projection.Datum" );
         const char* datumStr = NULL;
         if (datumEntry)
         {
            datumStr = datumEntry->getStringField("datumname");
         }
         if (datumStr != NULL)
         {
            m_datumName = ossimString(datumStr);;
         }
         break;
      }
      node = node->getNext();
   }

   fclose(fp);
   return true;
}

Member Data Documentation

m_auxInfo

ossimAuxInfo* ossimAuxFileHandler::m_auxInfo

private

Definition at line 224 of file ossimAuxFileHandler.h.

m_datumName

ossimString ossimAuxFileHandler::m_datumName

private

Definition at line 226 of file ossimAuxFileHandler.h.

m_projName

ossimString ossimAuxFileHandler::m_projName

private

Definition at line 225 of file ossimAuxFileHandler.h.

m_unitsType

ossimString ossimAuxFileHandler::m_unitsType

private

Definition at line 227 of file ossimAuxFileHandler.h.

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The documentation for this class was generated from the following files:

• ossimAuxFileHandler.h
• ossimAuxFileHandler.cpp