1/***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2022, Daniel Stenberg, <[email protected]>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24
25#include "timediff.h"
26
27/*
28 * Converts number of milliseconds into a timeval structure.
29 *
30 * Return values:
31 * NULL IF tv is NULL or ms < 0 (eg. no timeout -> blocking select)
32 * tv with 0 in both fields IF ms == 0 (eg. 0ms timeout -> polling select)
33 * tv with converted fields IF ms > 0 (eg. >0ms timeout -> waiting select)
34 */
35struct timeval *curlx_mstotv(struct timeval *tv, timediff_t ms)
36{
37 if(!tv)
38 return NULL;
39
40 if(ms < 0)
41 return NULL;
42
43 if(ms > 0) {
44 timediff_t tv_sec = ms / 1000;
45 timediff_t tv_usec = (ms % 1000) * 1000; /* max=999999 */
46#ifdef HAVE_SUSECONDS_T
47#if TIMEDIFF_T_MAX > TIME_T_MAX
48 /* tv_sec overflow check in case time_t is signed */
49 if(tv_sec > TIME_T_MAX)
50 tv_sec = TIME_T_MAX;
51#endif
52 tv->tv_sec = (time_t)tv_sec;
53 tv->tv_usec = (suseconds_t)tv_usec;
54#elif defined(WIN32) /* maybe also others in the future */
55#if TIMEDIFF_T_MAX > LONG_MAX
56 /* tv_sec overflow check on Windows there we know it is long */
57 if(tv_sec > LONG_MAX)
58 tv_sec = LONG_MAX;
59#endif
60 tv->tv_sec = (long)tv_sec;
61 tv->tv_usec = (long)tv_usec;
62#else
63#if TIMEDIFF_T_MAX > INT_MAX
64 /* tv_sec overflow check in case time_t is signed */
65 if(tv_sec > INT_MAX)
66 tv_sec = INT_MAX;
67#endif
68 tv->tv_sec = (int)tv_sec;
69 tv->tv_usec = (int)tv_usec;
70#endif
71 }
72 else {
73 tv->tv_sec = 0;
74 tv->tv_usec = 0;
75 }
76
77 return tv;
78}
79
80/*
81 * Converts a timeval structure into number of milliseconds.
82 */
83timediff_t curlx_tvtoms(struct timeval *tv)
84{
85 return (tv->tv_sec*1000) + (timediff_t)(((double)tv->tv_usec)/1000.0);
86}
87