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4f05b95f6c
There is a bug in gcc since 4.3.2 and still not fixed in 8.1.0. Even if __attribute__((format(strftime... is specified for a wrapper function around strftime, gcc still complains about strftime being called from the wrapper with a "non-literal" format argument. See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=39438 This commit adds 'ugly hacks' from that discussion to call strftime() from strftime-formatted wrappers and silence the warnings. Partially resolves ipmitool/ipmitool#23 Signed-off-by: Alexander Amelkin <alexander@amelkin.msk.ru>
94 lines
3.4 KiB
C
94 lines
3.4 KiB
C
/*
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* Copyright (c) 2018 Alexander Amelkin. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistribution of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* Redistribution in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* Neither the name of the copyright holder, nor the names of
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* This software is provided "AS IS," without a warranty of any kind.
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* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
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* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
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* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED.
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* THE COPYRIGHT HOLDER AND ITS LICENSORS SHALL NOT BE LIABLE
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* FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
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* OR DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL
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* THE COPYRIGHT HOLDER OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE,
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* PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
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* INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE
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* THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS
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* SOFTWARE, EVEN IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGES.
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*/
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#ifndef IPMI_TIME_H
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#define IPMI_TIME_H
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#include <time.h>
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#include <stdbool.h>
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extern bool time_in_utc;
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/* Special values according to IPMI v2.0, rev. 1.1, section 37.1 */
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#define IPMI_TIME_UNSPECIFIED 0xFFFFFFFFu
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#define IPMI_TIME_INIT_DONE 0x20000000u
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#define SECONDS_A_DAY (24 * 60 * 60)
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/*
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* Check whether the timestamp is in seconds since Epoch or since
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* the system startup.
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*/
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static inline bool ipmi_timestamp_is_special(time_t ts)
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{
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return (ts < IPMI_TIME_INIT_DONE);
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}
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/*
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* Check whether the timestamp is valid at all
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*/
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static inline bool ipmi_timestamp_is_valid(time_t ts)
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{
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return (ts != IPMI_TIME_UNSPECIFIED);
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}
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/*
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* Just 26 characters are required for asctime_r(), plus timezone info.
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* However just to be safe locale-wise and assuming that in no locale
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* the date/time string exceeds the 'standard' legacy terminal width,
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* the buffer size is set here to 80.
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*/
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#define IPMI_ASCTIME_SZ 80
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typedef char ipmi_datebuf_t[IPMI_ASCTIME_SZ];
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/*
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* These are ipmitool-specific versions that take
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* in account the command line options
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*/
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char *ipmi_asctime_r(time_t stamp, ipmi_datebuf_t outbuf);
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size_t ipmi_strftime(char *s, size_t max, const char *format, time_t stamp)
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__attribute__((format(strftime, 3, 0)));
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/* These return pointers to static arrays and aren't thread safe */
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char *ipmi_timestamp_fmt(uint32_t stamp, const char *fmt)
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__attribute__((format(strftime, 2, 0)));
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char *ipmi_timestamp_string(uint32_t stamp); /* Day Mon DD HH:MM:SS YYYY ZZZ */
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char *ipmi_timestamp_numeric(uint32_t stamp); /* MM/DD/YYYY HH:MM:SS ZZZ */
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char *ipmi_timestamp_date(uint32_t stamp); /* MM/DD/YYYY ZZZ */
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char *ipmi_timestamp_time(uint32_t stamp); /* HH:MM:SS ZZZ */
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/* Subtract the UTC offset from local time_t */
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time_t ipmi_localtime2utc(time_t local);
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#endif
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