89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "timediff.h"
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#include <limits.h>
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/*
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* Converts number of milliseconds into a timeval structure.
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*
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* Return values:
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* NULL IF tv is NULL or ms < 0 (eg. no timeout -> blocking select)
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* tv with 0 in both fields IF ms == 0 (eg. 0ms timeout -> polling select)
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* tv with converted fields IF ms > 0 (eg. >0ms timeout -> waiting select)
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*/
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struct timeval *curlx_mstotv(struct timeval *tv, timediff_t ms)
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{
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if(!tv)
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return NULL;
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if(ms < 0)
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return NULL;
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if(ms > 0) {
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timediff_t tv_sec = ms / 1000;
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timediff_t tv_usec = (ms % 1000) * 1000; /* max=999999 */
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#ifdef HAVE_SUSECONDS_T
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#if TIMEDIFF_T_MAX > TIME_T_MAX
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/* tv_sec overflow check in case time_t is signed */
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if(tv_sec > TIME_T_MAX)
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tv_sec = TIME_T_MAX;
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#endif
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tv->tv_sec = (time_t)tv_sec;
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tv->tv_usec = (suseconds_t)tv_usec;
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#elif defined(_WIN32) /* maybe also others in the future */
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#if TIMEDIFF_T_MAX > LONG_MAX
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/* tv_sec overflow check on Windows there we know it is long */
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if(tv_sec > LONG_MAX)
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tv_sec = LONG_MAX;
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#endif
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tv->tv_sec = (long)tv_sec;
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tv->tv_usec = (long)tv_usec;
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#else
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#if TIMEDIFF_T_MAX > INT_MAX
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/* tv_sec overflow check in case time_t is signed */
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if(tv_sec > INT_MAX)
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tv_sec = INT_MAX;
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#endif
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tv->tv_sec = (int)tv_sec;
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tv->tv_usec = (int)tv_usec;
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#endif
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}
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else {
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tv->tv_sec = 0;
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tv->tv_usec = 0;
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}
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return tv;
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}
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/*
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* Converts a timeval structure into number of milliseconds.
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*/
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timediff_t curlx_tvtoms(struct timeval *tv)
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{
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return (tv->tv_sec*1000) + (timediff_t)(((double)tv->tv_usec)/1000.0);
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}
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