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5191 | serge | 1 | /* Basic struct timeval utilities. |
2 | Copyright (C) 2011 Free Software Foundation, Inc. |
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3 | |||
4 | This file is part of the libiberty library. |
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5 | Libiberty is free software; you can redistribute it and/or |
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6 | modify it under the terms of the GNU Library General Public |
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7 | License as published by the Free Software Foundation; either |
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8 | version 2 of the License, or (at your option) any later version. |
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9 | |||
10 | Libiberty is distributed in the hope that it will be useful, |
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11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 | Library General Public License for more details. |
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14 | |||
15 | You should have received a copy of the GNU Library General Public |
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16 | License along with libiberty; see the file COPYING.LIB. If not, |
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17 | write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
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18 | Boston, MA 02110-1301, USA. */ |
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19 | |||
20 | #include "config.h" |
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21 | |||
22 | /* On some systems (such as WindISS), you must include |
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23 | to get the definition of "time_t" before you include |
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24 | #include |
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25 | |||
26 | #ifdef TIME_WITH_SYS_TIME |
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27 | # include |
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28 | # include |
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29 | #else |
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30 | # if HAVE_SYS_TIME_H |
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31 | # include |
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32 | # else |
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33 | # ifdef HAVE_TIME_H |
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34 | # include |
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35 | # endif |
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36 | # endif |
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37 | #endif |
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38 | |||
39 | #include "timeval-utils.h" |
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40 | |||
41 | /* |
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42 | |||
43 | @deftypefn Extension void timeval_add (struct timeval *@var{a}, @ |
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44 | struct timeval *@var{b}, struct timeval *@var{result}) |
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45 | |||
46 | Adds @var{a} to @var{b} and stores the result in @var{result}. |
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47 | |||
48 | @end deftypefn |
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49 | |||
50 | */ |
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51 | |||
52 | void |
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53 | timeval_add (struct timeval *result, |
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54 | const struct timeval *a, const struct timeval *b) |
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55 | { |
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56 | result->tv_sec = a->tv_sec + b->tv_sec; |
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57 | result->tv_usec = a->tv_usec + b->tv_usec; |
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58 | if (result->tv_usec >= 1000000) |
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59 | { |
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60 | ++result->tv_sec; |
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61 | result->tv_usec -= 1000000; |
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62 | } |
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63 | } |
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64 | |||
65 | /* |
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66 | |||
67 | @deftypefn Extension void timeval_sub (struct timeval *@var{a}, @ |
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68 | struct timeval *@var{b}, struct timeval *@var{result}) |
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69 | |||
70 | Subtracts @var{b} from @var{a} and stores the result in @var{result}. |
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71 | |||
72 | @end deftypefn |
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73 | |||
74 | */ |
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75 | |||
76 | void |
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77 | timeval_sub (struct timeval *result, |
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78 | const struct timeval *a, const struct timeval *b) |
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79 | { |
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80 | result->tv_sec = a->tv_sec - b->tv_sec; |
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81 | result->tv_usec = a->tv_usec - b->tv_usec; |
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82 | if (result->tv_usec < 0) |
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83 | { |
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84 | --result->tv_sec; |
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85 | result->tv_usec += 1000000; |
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86 | } |
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87 | }> |