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//***************************************************************************
//
// (c) 2000-2001 by Microsoft Corp. All Rights Reserved.
//
// datepart.h
//
// a-davcoo 28-Feb-00 Implements the SQL datepart operation.
//
//***************************************************************************
#ifndef _DATEPART_H_
#define _DATEPART_H_
#include <strutils.h>
#include <datetimeparser.h>
#define DATEPART_YEAR 1 // "yy", "year"
#define DATEPART_MONTH 3 // "mm", "month"
#define DATEPART_DAY 5 // "dd", "day"
#define DATEPART_HOUR 8 // "hh", "hour"
#define DATEPART_MINUTE 9 // "mi", "minute"
#define DATEPART_SECOND 10 // "ss", "second"
#define DATEPART_MILLISECOND 11 // "ms", "millisecond"
class CDMTFParser;
// The CDatePart class implements the SQL "datepart" operation. To use
// this class, construct an instance, supplying the date string you wish
// to parse. Then use the GetPart() method to extract the specified part.
// Contants for the "parts" are presented above. The class makes it's own
// copy of the date string supplied during construction.
class POLARITY CDatePart{ public: CDatePart (); ~CDatePart ();
HRESULT SetDate (LPCWSTR lpDate); HRESULT SetDate (LPCSTR lpDate); HRESULT GetPart (int datepart, int *value);
protected: CDMTFParser *m_date;};
class POLARITY CDMTFParser{ public: enum {YEAR, MONTH, DAY, HOUR, MINUTE, SECOND, MICROSECOND, OFFSET};
CDMTFParser (LPCWSTR date); ~CDMTFParser (void);
bool IsValid (void); bool IsInterval (void);
bool IsUsed (int part); bool IsWildcard (int part); int GetValue (int part);
protected: enum {INVALID=0x0, VALID=0x1, NOTSUPPLIED=0x2, NOTUSED=0x4}; enum {NUMPARTS=8};
bool m_valid; bool m_interval;
int m_status[NUMPARTS]; int m_part[NUMPARTS];
void ParseDate (LPCWSTR date); void ParseInterval (LPCWSTR date); void ParseAbsolute (LPCWSTR date); int ParsePart (LPCWSTR date, int pos, int length, int *result, int min, int max);};
#endif // _DATEPART_H_
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