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/////////////////////////////////////////////////////////////////////////////
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//主要功能:
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// SegY读写类
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//
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//程序编写: 2008-11-09
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//
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//
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/////////////////////////////////////////////////////////////////////////////
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#pragma once
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#include "file64.h"
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#if !defined(__FILE64_SEGY__)
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#define __FILE64_SEGY__
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//nFormatCode is
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//1 = 4-byte IBM floating-point
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//2 = 4-byte, two's complement integer
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//3 = 2-byte, two's complement integer
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//4 = 4-byte fixed-point with gain (obsolete)
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//5 = 4-byte IEEE floating-point
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//6 = Not currently used
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//7 = Not currently used
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//8 = 1-byte, two's complement integer
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//CreateIoFile(...) parameter
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namespace NFile64
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{
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#define FILE_DEFAULT 0
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#define FILE_MAPPING 1
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#define FILE_HTTP 2
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class CFileSegy :
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public CFile64
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{
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public:
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CFileSegy(void);
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virtual ~CFileSegy(void);
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enum EDataType
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{
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typeError = 0, //错误类型
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typeIbmFloat = 1, // 4-byte IBM floating-point
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typeIbmLong = 2, // 4-byte, two's complement integer
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typeIbmShort = 3, // 2-byte, two's complement integer
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typeIbmGainLong = 4, // 4-byte fixed-point with gain (obsolete)
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typeIeeFloat = 5, // IEEE floating-point
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// 8-bit, integer
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// 7 为了地震剖面格式中的扩展
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typeChar = 8, // signed char (1 byte)
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typeIbmUShort = 9, // 2-byte, two's complement integer
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typeIeeShort = 10, //
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typeIeeLong = 11, //
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typeIeeDouble = 12, // IEEE双精度实数（8字节）
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};
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//针对地震剖面（SEGY文件）所做
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static int SizeofDataType(EDataType dt); //获得数据类型的长度
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static CString GetFormatString(EDataType code);
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static EDataType GetFormatCode(CString name);
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//目前仅生成CFileSegy或CFileSegyMapping对象
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static CFileSegy* CreateIoFile(int nCreateMode = FILE_DEFAULT); //new一个新对象
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double ReadBinary(EDataType dt, int IsPC); //读取一个数据
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int ReadBinary(float * x, int num, EDataType dt, int IsSwap);
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int ReadBinary(double* x, int num, EDataType dt, int IsSwap);
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double GetBinary(BYTE *lpValue, EDataType dt, int IsSwap);
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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
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int WriteBinary(double v, EDataType dt, int IsSwap); //写一个数据
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int WriteBinary(double *pv, int num, EDataType dt, int IsSwap);
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long FloatToLong(double value);
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};
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};
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using namespace NFile64;
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//判断是否是HTTP形式的网络文件
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extern bool IsURL(LPCTSTR name, DWORD *pdwServiceType=NULL);
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inline long NFile64::CFileSegy::FloatToLong(double value)
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{
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if(value<0) return (long)(value-0.5);
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return (long)(value+0.5);
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}
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#endif // !defined(__FILE64_SEGY__)
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