/src/PROJ/curl/lib/curlx/timediff.c
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1 | | /*************************************************************************** |
2 | | * _ _ ____ _ |
3 | | * Project ___| | | | _ \| | |
4 | | * / __| | | | |_) | | |
5 | | * | (__| |_| | _ <| |___ |
6 | | * \___|\___/|_| \_\_____| |
7 | | * |
8 | | * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, 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 | | #include <limits.h> |
28 | | |
29 | | /* |
30 | | * Converts number of milliseconds into a timeval structure. |
31 | | * |
32 | | * Return values: |
33 | | * NULL IF tv is NULL or ms < 0 (eg. no timeout -> blocking select) |
34 | | * tv with 0 in both fields IF ms == 0 (eg. 0ms timeout -> polling select) |
35 | | * tv with converted fields IF ms > 0 (eg. >0ms timeout -> waiting select) |
36 | | */ |
37 | | struct timeval *curlx_mstotv(struct timeval *tv, timediff_t ms) |
38 | 0 | { |
39 | 0 | if(!tv) |
40 | 0 | return NULL; |
41 | | |
42 | 0 | if(ms < 0) |
43 | 0 | return NULL; |
44 | | |
45 | 0 | if(ms > 0) { |
46 | 0 | timediff_t tv_sec = ms / 1000; |
47 | 0 | timediff_t tv_usec = (ms % 1000) * 1000; /* max=999000 */ |
48 | 0 | #ifdef HAVE_SUSECONDS_T |
49 | | #if TIMEDIFF_T_MAX > TIME_T_MAX |
50 | | /* tv_sec overflow check in case time_t is signed */ |
51 | | if(tv_sec > TIME_T_MAX) |
52 | | tv_sec = TIME_T_MAX; |
53 | | #endif |
54 | 0 | tv->tv_sec = (time_t)tv_sec; |
55 | 0 | tv->tv_usec = (suseconds_t)tv_usec; |
56 | | #elif defined(_WIN32) /* maybe also others in the future */ |
57 | | #if TIMEDIFF_T_MAX > LONG_MAX |
58 | | /* tv_sec overflow check on Windows there we know it is long */ |
59 | | if(tv_sec > LONG_MAX) |
60 | | tv_sec = LONG_MAX; |
61 | | #endif |
62 | | tv->tv_sec = (long)tv_sec; |
63 | | tv->tv_usec = (long)tv_usec; |
64 | | #else |
65 | | #if TIMEDIFF_T_MAX > INT_MAX |
66 | | /* tv_sec overflow check in case time_t is signed */ |
67 | | if(tv_sec > INT_MAX) |
68 | | tv_sec = INT_MAX; |
69 | | #endif |
70 | | tv->tv_sec = (int)tv_sec; |
71 | | tv->tv_usec = (int)tv_usec; |
72 | | #endif |
73 | 0 | } |
74 | 0 | else { |
75 | 0 | tv->tv_sec = 0; |
76 | 0 | tv->tv_usec = 0; |
77 | 0 | } |
78 | |
|
79 | 0 | return tv; |
80 | 0 | } |
81 | | |
82 | | /* |
83 | | * Converts a timeval structure into number of milliseconds. |
84 | | */ |
85 | | timediff_t curlx_tvtoms(struct timeval *tv) |
86 | 0 | { |
87 | 0 | return (tv->tv_sec*1000) + (timediff_t)(tv->tv_usec/1000); |
88 | 0 | } |