| 1 | //======================================================================== |
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| 2 | // |
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| 3 | // glibc.h |
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| 4 | // |
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| 5 | // Emulate various non-portable glibc functions. |
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| 6 | // |
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| 7 | // This file is licensed under the GPLv2 or later |
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| 8 | // |
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| 9 | // Copyright (C) 2016 Adrian Johnson <ajohnson@redneon.com> |
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| 10 | // Copyright (C) 2022 Albert Astals Cid <aacid@kde.org> |
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| 11 | // |
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| 12 | //======================================================================== |
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| 13 | |
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| 14 | #include "glibc.h" |
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| 15 | |
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| 16 | #ifndef HAVE_GMTIME_R |
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| 17 | struct tm *gmtime_r(const time_t *timep, struct tm *result) |
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| 18 | { |
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| 19 | struct tm *gt; |
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| 20 | gt = gmtime(timep); |
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| 21 | if (gt) |
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| 22 | *result = *gt; |
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| 23 | return gt; |
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| 24 | } |
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| 25 | #endif |
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| 26 | |
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| 27 | #ifndef HAVE_LOCALTIME_R |
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| 28 | struct tm *localtime_r(const time_t *timep, struct tm *result) |
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| 29 | { |
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| 30 | struct tm *lt; |
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| 31 | lt = localtime(timep); |
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| 32 | *result = *lt; |
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| 33 | return lt; |
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| 34 | } |
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| 35 | #endif |
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| 36 | |
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| 37 | #ifndef HAVE_TIMEGM |
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| 38 | // Get offset of local time from UTC in seconds. DST is ignored. |
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| 39 | static time_t getLocalTimeZoneOffset() |
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| 40 | { |
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| 41 | time_t utc, local; |
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| 42 | struct tm tm_utc; |
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| 43 | time(&utc); |
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| 44 | gmtime_r(&utc, &tm_utc); |
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| 45 | local = mktime(&tm_utc); |
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| 46 | return static_cast<time_t>(difftime(utc, local)); |
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| 47 | } |
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| 48 | |
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| 49 | time_t timegm(struct tm *tm) |
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| 50 | { |
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| 51 | tm->tm_isdst = 0; |
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| 52 | time_t t = mktime(tm); |
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| 53 | if (t == -1) |
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| 54 | return t; |
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| 55 | |
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| 56 | t += getLocalTimeZoneOffset(); |
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| 57 | return t; |
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| 58 | } |
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| 59 | #endif |
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| 60 | |
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