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Diffstat (limited to 'firmware/libc/mktime.c')
-rw-r--r-- | firmware/libc/mktime.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/firmware/libc/mktime.c b/firmware/libc/mktime.c new file mode 100644 index 0000000000..a52381ede5 --- /dev/null +++ b/firmware/libc/mktime.c | |||
@@ -0,0 +1,61 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2002 by Linus Nielsen Feltzing | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or | ||
13 | * modify it under the terms of the GNU General Public License | ||
14 | * as published by the Free Software Foundation; either version 2 | ||
15 | * of the License, or (at your option) any later version. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | |||
22 | |||
23 | #include <time.h> | ||
24 | #include "config.h" | ||
25 | |||
26 | #if CONFIG_RTC | ||
27 | /* mktime() code taken from lynx-2.8.5 source, written | ||
28 | by Philippe De Muyter <phdm@macqel.be> */ | ||
29 | time_t mktime(struct tm *t) | ||
30 | { | ||
31 | short month, year; | ||
32 | time_t result; | ||
33 | static int m_to_d[12] = | ||
34 | {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334}; | ||
35 | |||
36 | month = t->tm_mon; | ||
37 | year = t->tm_year + month / 12 + 1900; | ||
38 | month %= 12; | ||
39 | if (month < 0) | ||
40 | { | ||
41 | year -= 1; | ||
42 | month += 12; | ||
43 | } | ||
44 | result = (year - 1970) * 365 + (year - 1969) / 4 + m_to_d[month]; | ||
45 | result = (year - 1970) * 365 + m_to_d[month]; | ||
46 | if (month <= 1) | ||
47 | year -= 1; | ||
48 | result += (year - 1968) / 4; | ||
49 | result -= (year - 1900) / 100; | ||
50 | result += (year - 1600) / 400; | ||
51 | result += t->tm_mday; | ||
52 | result -= 1; | ||
53 | result *= 24; | ||
54 | result += t->tm_hour; | ||
55 | result *= 60; | ||
56 | result += t->tm_min; | ||
57 | result *= 60; | ||
58 | result += t->tm_sec; | ||
59 | return(result); | ||
60 | } | ||
61 | #endif | ||