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 | */ |
35 | struct 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 | */ |
83 | timediff_t curlx_tvtoms(struct timeval *tv) |
84 | { |
85 | return (tv->tv_sec*1000) + (timediff_t)(((double)tv->tv_usec)/1000.0); |
86 | } |
87 | |