/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
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 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. 
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 * The contents of this file, and the files included with this file, are 
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 * This file is part of the Helix DNA Technology. RealNetworks is the 
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 * ***** END LICENSE BLOCK ***** */ 

/*
 * UTCTimeRep holds a UTC timestamp in internal (time_t) representation.  It
 * can convert to/from RFC-1123, RFC-850, ANSI 'asctime', and UTC strings.
 *
 * Dates prior to 1970 are not supported because (1) time_t is unsigned on
 * some systems, and (2) time_t is frequently cast to UINT32 in Helix code.
 *
 * Dates after 2037 are not supported because time_t is usually signed.
 */

#include "hlxclib/time.h"

#ifndef _UTCTimeRep_H_
#define _UTCTimeRep_H_

#ifdef _WIN16
size_t strftime16(char* pDest, size_t nDestLen, const char* pFormat, const struct tm* ptm);
#endif /* _WIN16 */

#define MAX_UTC_TIME_LEN 80

#define INVALID_TIME_T (time_t)(-1)

class UTCTimeRep
{
public:
    UTCTimeRep(void);                       // Create from current time
    UTCTimeRep(const char* pStr);           // Create from string
    UTCTimeRep(time_t t, BOOL bUTC=TRUE);   // Create from time_t value
    ~UTCTimeRep(void);

    const char* asRFC1123String(void);
    const char* asRFC850String(void);
    const char* asUTCString(void);
    time_t      asUTCTimeT(void);

    void SetLocalTime(time_t t);
    void SetUTCTime(time_t t);
    void SetTime(const char* pStr);

private:
    int fromTime(time_t t);             // Set from time_t in localtime
    int fromUTCTime(time_t t);          // Set from time_t in GMT
    int fromTm(struct tm* ptm);         // Set from struct tm in localtime
    int fromUTCTm(struct tm* ptm);      // Set from struct tm in GMT
    int fromString(const char* pStr);   // Set from RFC1123/RFC850/asctime/UTC

    //XXXTDM: we could remove this if asXXXString() took input strings
    char        m_szTime[MAX_UTC_TIME_LEN+1]; /* Flawfinder: ignore */
    time_t      m_tTime;
};

#endif
