Date: Sat, 2 Jun 2001 20:33:08 -0400 (EDT) From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> To: Yoshihiro.Koya@math.yokohama-cu.ac.jp Cc: stable@freebsd.org Subject: Re: time_t definition is worng Message-ID: <200106030033.UAA57864@khavrinen.lcs.mit.edu> In-Reply-To: <20010603012933K.koya@pluto.math.yokohama-cu.ac.jp> References: <20010602085237.A73968@dragon.nuxi.com> <20010603010518C.koya@pluto.math.yokohama-cu.ac.jp> <20010602091643.C73968@dragon.nuxi.com>
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In article <20010603012933K.koya@pluto.math.yokohama-cu.ac.jp> you write: >The pw->pw_chage and pw->pw_passwd are of time_t. But, in the above, >%ld is used for them. This is a general problem; there is no portable way to print a time_t that does not include the following steps: 1) Determine whether time_t is integral, floating-point, or (new in C99) complex. 2) If time_t is integral, determine whether it is signed or unsigned. 3) If the compilation environment is not C99, and time_t is integral, cast to (appropriately signed) long and print with %ld or %lu as appropriate. If the compilation environment is (close enough to) C99, case to (appropriately signed) intmax_t and print with %jd or %ju as appropriate. If time_t is floating-point, cast to long double and print with %Lf. If time_t is complex, you have a lot more serious problems to deal with. There is a simple way around this, for POSIX systems only: use strftime() with the %s format. -GAWollman -- Garrett A. Wollman | O Siem / We are all family / O Siem / We're all the same wollman@lcs.mit.edu | O Siem / The fires of freedom Opinions not those of| Dance in the burning flame MIT, LCS, CRS, or NSA| - Susan Aglukark and Chad Irschick To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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