dostypes.h

C标准库源代码

/***
*dostypes.h - defines DOS packed date and time types
*
*       Copyright (c) 1987-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
*       This file defines the DOS packed date and time types.
*
*       [Internal]
*
****/

#if _MSC_VER > 1000
#pragma once
#endif  /* _MSC_VER > 1000 */

#ifndef _INC_DOSTYPES
#define _INC_DOSTYPES

#ifndef _CRTBLD
/*
 * This is an internal C runtime header file. It is used when building
 * the C runtimes only. It is not to be used as a public header file.
 */
#error ERROR: Use of C runtime library internal header file.
#endif  /* _CRTBLD */

#define MASK4   0xf     /* 4 bit mask */
#define MASK5   0x1f    /* 5 bit mask */
#define MASK6   0x3f    /* 6 bit mask */
#define MASK7   0x7f    /* 7 bit mask */

#define DAYLOC          0       /* day value starts in bit 0 */
#define MONTHLOC        5       /* month value starts in bit 5 */
#define YEARLOC         9       /* year value starts in bit 9 */

#define SECLOC          0       /* seconds value starts in bit 0 */
#define MINLOC          5       /* minutes value starts in bit 5 */
#define HOURLOC         11      /* hours value starts in bit 11 */

#define _DATECAST(fd)                   * (unsigned short *) &(fd)
#define _TIMECAST(ft)                   * (unsigned short *) &(ft)

#ifdef _WIN32

#define SET_DOS_DAY(fd, xday)           fd.Day = (unsigned short)((xday) & MASK5)
#define SET_DOS_MONTH(fd, xmon)         fd.Month = (unsigned short)((xmon) & MASK4)
#define SET_DOS_YEAR(fd, xyr)           fd.Year = (unsigned short)((xyr) & MASK7)

#define SET_DOS_HOUR(ft, xhr)           ft.Hours = (unsigned short)((xhr) & MASK5)
#define SET_DOS_MIN(ft, xmin)           ft.Minutes = (unsigned short)((xmin) & MASK6)
#define SET_DOS_SEC(ft, xsec)           ft.DoubleSeconds = (unsigned short)((xsec) & MASK5)

#define DOS_DAY(fd)                     (fd.Day)
#define DOS_MONTH(fd)                   (fd.Month)
#define DOS_YEAR(fd)                    (fd.Year)

#define DOS_HOUR(ft)                    (ft.Hours)
#define DOS_MIN(ft)                     (ft.Minutes)
#define DOS_SEC(ft)                     (ft.DoubleSeconds)

#else  /* _WIN32 */

#ifdef _MAC

#define SET_DOS_DAY(fd, xday)           fd.day = (unsigned short)((xday) & MASK5)
#define SET_DOS_MONTH(fd, xmon)         fd.month = (unsigned short)((xmon) & MASK4)
#define SET_DOS_YEAR(fd, xyr)           fd.year = (unsigned short)((xyr) & MASK7)

#define SET_DOS_HOUR(ft, xhr)           ft.hours = (unsigned short)((xhr) & MASK5)
#define SET_DOS_MIN(ft, xmin)           ft.minutes = (unsigned short)((xmin) & MASK6)
#define SET_DOS_SEC(ft, xsec)           ft.twosecs = (unsigned short)((xsec) & MASK5)

#define DOS_DAY(fd)                     (fd.day)
#define DOS_MONTH(fd)                   (fd.month)
#define DOS_YEAR(fd)                    (fd.year)

#define DOS_HOUR(ft)                    (ft.hours)
#define DOS_MIN(ft)                     (ft.minutes)
#define DOS_SEC(ft)                     (ft.twosecs)

#else  /* _MAC */

#error ERROR - ONLY WIN32 OR MAC TARGET SUPPORTED!

#endif  /* _MAC */

#endif  /* _WIN32 */

#define XTIME(d,t) _dtoxtime(DOS_YEAR(d),DOS_MONTH(d),DOS_DAY(d),DOS_HOUR(t),\
     DOS_MIN(t),DOS_SEC(t)*2)

#endif  /* _INC_DOSTYPES */