Last change
on this file since 577 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
1.4 KB
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1 | /* |
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2 | * gmtime.c |
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3 | * Original Author: G. Haley |
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4 | * |
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5 | * Converts the calendar time pointed to by tim_p into a broken-down time |
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6 | * expressed as Greenwich Mean Time (GMT). Returns a pointer to a structure |
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7 | * containing the broken-down time, or a null pointer if GMT is not |
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8 | * available. |
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9 | */ |
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10 | |
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11 | /* |
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12 | FUNCTION |
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13 | <<gmtime>>---convert time to UTC traditional form |
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14 | |
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15 | INDEX |
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16 | gmtime |
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17 | INDEX |
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18 | gmtime_r |
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19 | |
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20 | SYNOPSIS |
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21 | #include <time.h> |
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22 | struct tm *gmtime(const time_t *<[clock]>); |
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23 | struct tm *gmtime_r(const time_t *<[clock]>, struct tm *<[res]>); |
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24 | |
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25 | DESCRIPTION |
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26 | <<gmtime>> takes the time at <[clock]> representing the number |
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27 | of elapsed seconds since 00:00:00 on January 1, 1970, Universal |
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28 | Coordinated Time (UTC, also known in some countries as GMT, |
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29 | Greenwich Mean time) and converts it to a <<struct tm>> |
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30 | representation. |
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31 | |
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32 | <<gmtime>> constructs the traditional time representation in static |
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33 | storage; each call to <<gmtime>> or <<localtime>> will overwrite the |
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34 | information generated by previous calls to either function. |
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35 | |
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36 | RETURNS |
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37 | A pointer to the traditional time representation (<<struct tm>>). |
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38 | |
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39 | PORTABILITY |
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40 | ANSI C requires <<gmtime>>. |
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41 | |
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42 | <<gmtime>> requires no supporting OS subroutines. |
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43 | */ |
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44 | |
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45 | #include <stdlib.h> |
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46 | #include <time.h> |
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47 | |
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48 | #define _GMT_OFFSET 0 |
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49 | |
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50 | #ifndef _REENT_ONLY |
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51 | |
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52 | struct tm * |
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53 | gmtime (const time_t * tim_p) |
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54 | { |
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55 | struct _reent *reent = _REENT; |
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56 | |
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57 | _REENT_CHECK_TM(reent); |
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58 | return gmtime_r (tim_p, (struct tm *)_REENT_TM(reent)); |
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59 | } |
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60 | |
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61 | #endif |
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