An extendable report editor

// HeaderFile.cpp: implementation of the CHeaderFile class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "HeaderFile.h"

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
char *CHeaderFile::str_end_of_xml = "[This is the end of XML!]\r\n";
int CHeaderFile::max_header_size = 128 * 1024;

CHeaderFile::CHeaderFile()
{
    this->InitBasic();
}
CHeaderFile::~CHeaderFile()
{
    this->Destroy();
}
int CHeaderFile::InitBasic()
{
    return OK;
}
int CHeaderFile::Init()
{
    this->InitBasic();	
    return OK;
}
int  CHeaderFile::Destroy()
{
    this->InitBasic();
    return OK;
}

int CHeaderFile::WriteToFile(CFileBase *file_des, CFileBase *file_src, CXml *pxml)
{
	//pxml can be NULL, if so only file_src is written to the file_des
	ASSERT(file_des);
	ASSERT(file_src);

	if(pxml)
	{
		pxml->WriteToFile(file_des);
		file_des->Puts(CHeaderFile::str_end_of_xml);
	}
	file_des->WriteFile(file_src);
	
	return OK;
}

int CHeaderFile::WriteToFile(char *fn_des, CFileBase *file_src, CXml *pxml)
{
	CFile file;
	int ret;
	
	ASSERT(file_src);
	ASSERT(pxml);
	
	file.Init();
	ret = file.OpenFile(fn_des,"wb+");
	ASSERT(ret);

	CHeaderFile::WriteToFile(&file,file_src,pxml);

	file.Destroy();

	return OK;
}

//return value is the header size;
int CHeaderFile::LoadHeader(CFileBase *header_file, CXml *pxml)
{
	CMem mem;
	int pos,hsize = -1;
	
	ASSERT(header_file);
	ASSERT(pxml);

	mem.Init();
	mem.Malloc(CHeaderFile::max_header_size + 10);

	header_file->Seek(0);
	header_file->WriteToFile(&mem,CHeaderFile::max_header_size);

	mem.Seek(0);
	pos = mem.SearchStr(CHeaderFile::str_end_of_xml,0,0);

	if(pos >= 0)
	{
		hsize = pos + strlen(CHeaderFile::str_end_of_xml);
	}

	mem.SetChar(pos,0);
	mem.SetSize(pos);

	pxml->LoadXml(&mem);

	mem.Destroy();

	return hsize;
}

int CHeaderFile::LoadHeader(char *fn, CXml *pxml)
{
	int pos;

	ASSERT(pxml);

	CFile file;

	file.Init();
	file.OpenFile(fn,"rb");

	pos = CHeaderFile::LoadHeader(&file,pxml);

	file.Destroy();

	return pos;
}