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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#include "timediff.h"
#include <limits.h>
/*
* Converts number of milliseconds into a timeval structure.
*
* Return values:
* NULL IF tv is NULL or ms < 0 (eg. no timeout -> blocking select)
* tv with 0 in both fields IF ms == 0 (eg. 0ms timeout -> polling select)
* tv with converted fields IF ms > 0 (eg. >0ms timeout -> waiting select)
*/
struct timeval *curlx_mstotv(struct timeval *tv, timediff_t ms)
{
if(!tv)
return NULL;
if(ms < 0)
return NULL;
if(ms > 0) {
timediff_t tv_sec = ms / 1000;
timediff_t tv_usec = (ms % 1000) * 1000; /* max=999999 */
#ifdef HAVE_SUSECONDS_T
#if TIMEDIFF_T_MAX > TIME_T_MAX
/* tv_sec overflow check in case time_t is signed */
if(tv_sec > TIME_T_MAX)
tv_sec = TIME_T_MAX;
#endif
tv->tv_sec = (time_t)tv_sec;
tv->tv_usec = (suseconds_t)tv_usec;
#elif defined(WIN32) /* maybe also others in the future */
#if TIMEDIFF_T_MAX > LONG_MAX
/* tv_sec overflow check on Windows there we know it is long */
if(tv_sec > LONG_MAX)
tv_sec = LONG_MAX;
#endif
tv->tv_sec = (long)tv_sec;
tv->tv_usec = (long)tv_usec;
#else
#if TIMEDIFF_T_MAX > INT_MAX
/* tv_sec overflow check in case time_t is signed */
if(tv_sec > INT_MAX)
tv_sec = INT_MAX;
#endif
tv->tv_sec = (int)tv_sec;
tv->tv_usec = (int)tv_usec;
#endif
}
else {
tv->tv_sec = 0;
tv->tv_usec = 0;
}
return tv;
}
/*
* Converts a timeval structure into number of milliseconds.
*/
timediff_t curlx_tvtoms(struct timeval *tv)
{
return (tv->tv_sec*1000) + (timediff_t)(((double)tv->tv_usec)/1000.0);
}
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