/////////////////////////////////////////////////////////////////////////////
//主要功能: 
//		SegY读写类
//
//程序编写:		2008-11-09
//
//
/////////////////////////////////////////////////////////////////////////////

#pragma once
#include "file64.h"

#if !defined(__FILE64_SEGY__)
#define __FILE64_SEGY__

//nFormatCode is
//1 = 4-byte IBM floating-point
//2 = 4-byte, two's complement integer
//3 = 2-byte, two's complement integer
//4 = 4-byte fixed-point with gain (obsolete)
//5 = 4-byte IEEE floating-point
//6 = Not currently used
//7 = Not currently used
//8 = 1-byte, two's complement integer

//CreateIoFile(...) parameter

namespace NFile64
{

#define FILE_DEFAULT	0
#define FILE_MAPPING	1
#define FILE_HTTP		2

class CFileSegy :
	public CFile64
{
public:
	CFileSegy(void);
	virtual ~CFileSegy(void);

	enum EDataType
	{
		typeError		= 0,		//错误类型
		typeIbmFloat	= 1,		// 4-byte IBM floating-point
		typeIbmLong     = 2,		// 4-byte, two's complement integer
		typeIbmShort    = 3,		// 2-byte, two's complement integer
		typeIbmGainLong = 4,		// 4-byte fixed-point with gain (obsolete)
		typeIeeFloat    = 5,		// IEEE floating-point
									// 8-bit, integer
									// 7 为了地震剖面格式中的扩展
		typeChar        = 8,		// signed char (1 byte)
		typeIbmUShort   = 9,		// 2-byte, two's complement integer
		typeIeeShort	= 10,		//
		typeIeeLong		= 11,		//
		typeIeeDouble	= 12,		// IEEE双精度实数（8字节）
	};
	//针对地震剖面（SEGY文件）所做
	static int SizeofDataType(EDataType dt);		//获得数据类型的长度
	static CString GetFormatString(EDataType code);
	static EDataType GetFormatCode(CString name);

	//目前仅生成CFileSegy或CFileSegyMapping对象
	static CFileSegy* CreateIoFile(int nCreateMode = FILE_DEFAULT);	//new一个新对象

	double ReadBinary(EDataType dt, int IsPC);				//读取一个数据
	int ReadBinary(float * x, int num, EDataType dt, int IsSwap);
	int ReadBinary(double* x, int num, EDataType dt, int IsSwap);

	double GetBinary(BYTE *lpValue, EDataType dt, int IsSwap);
	int    GetBinary(BYTE *lpValue, EDataType dt, int IsSwap, void* toValue);	//结果输出在toValue中，返回0表示不成功

	int WriteBinary(double v, EDataType dt, int IsSwap);			//写一个数据
	int WriteBinary(double *pv, int num, EDataType dt, int IsSwap);

	long FloatToLong(double value);
};

};

using namespace NFile64;

//判断是否是HTTP形式的网络文件
extern bool IsURL(LPCTSTR name, DWORD *pdwServiceType=NULL);

inline long NFile64::CFileSegy::FloatToLong(double value)
{
	if(value<0) return (long)(value-0.5);
	return (long)(value+0.5);
}

#endif // !defined(__FILE64_SEGY__)