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