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author | Nebuleon Fumika | 2013-02-03 04:19:11 -0500 |
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committer | Nebuleon Fumika | 2013-02-03 04:19:11 -0500 |
commit | 8693ae1bd880a758eb2efec4fccd32f89593855d (patch) | |
tree | 660b7ceed1789fc904332b96a2a4006b0e4cc6b8 /sdk-modifications/libsrc/fs/filetime.c | |
parent | 02f8184fe07d99cceb85f4abd3ef0e5e3765b5ea (diff) | |
download | snesemu-8693ae1bd880a758eb2efec4fccd32f89593855d.tar.gz snesemu-8693ae1bd880a758eb2efec4fccd32f89593855d.tar.bz2 snesemu-8693ae1bd880a758eb2efec4fccd32f89593855d.zip |
Add SDK modifications by BassAceGold as of 2011-04-14, as well as modified DMA functions as of 2013-01-29.
Diffstat (limited to 'sdk-modifications/libsrc/fs/filetime.c')
-rw-r--r-- | sdk-modifications/libsrc/fs/filetime.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/sdk-modifications/libsrc/fs/filetime.c b/sdk-modifications/libsrc/fs/filetime.c new file mode 100644 index 0000000..f2de6ef --- /dev/null +++ b/sdk-modifications/libsrc/fs/filetime.c @@ -0,0 +1,146 @@ +/* + filetime.c + Conversion of file time and date values to various other types + + Copyright (c) 2006 Michael "Chishm" Chisholm + + Redistribution and use in source and binary forms, with or without modification, + are permitted provided that the following conditions are met: + + 1. Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + 2. Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation and/or + other materials provided with the distribution. + 3. The name of the author may not be used to endorse or promote products derived + from this software without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY + AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE + LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, + EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + + 2006-07-11 - Chishm + * Original release + + 2006-09-30 - Chishm + * Validity checks performed on the time supplied by the IPC + * Cleaned up magic numbers + + 2006-10-01 - Chishm + * Fixed incorrect use of bitwise-or instead of logical-or +*/ + + +#include "filetime.h" + +#ifdef NDS +//#include <nds/ipc.h> +#include "ds2io.h" +#endif + +#define HOUR_PM_INDICATOR 40 + +#define MAX_HOUR 23 +#define MAX_MINUTE 59 +#define MAX_SECOND 59 + +#define MAX_YEAR 99 +#define MIN_YEAR 6 // The date is invalid if it's before this year +#define MAX_MONTH 12 +#define MIN_MONTH 1 +#define MAX_DAY 31 +#define MIN_DAY 1 + +// Second values are averages, so time value won't be 100% accurate, +// but should be within the correct month. +#define SECONDS_PER_MINUTE 60 +#define SECONDS_PER_HOUR 3600 +#define SECONDS_PER_DAY 86400 +#define SECONDS_PER_MONTH 2629743 +#define SECONDS_PER_YEAR 31556926 + +u16 _FAT_filetime_getTimeFromRTC (void) { +#ifdef NDS + int hour, minute, second; + struct rtc time; + + ds2_getTime(&time); + + hour = (time.hours >= HOUR_PM_INDICATOR ? time.hours - HOUR_PM_INDICATOR : time.hours); + minute = time.minutes; + second = time.seconds; + + // Check that the values are all in range. + // If they are not, return 0 (no timestamp) + if ((hour < 0) || (hour > MAX_HOUR)) return 0; + if ((minute < 0) || (minute > MAX_MINUTE)) return 0; + if ((second < 0) || (second > MAX_SECOND)) return 0; + + return ( + ((hour & 0x1F) << 11) | + ((minute & 0x3F) << 5) | + ((second >> 1) & 0x1F) + ); +#else + return 0; +#endif +} + + +u16 _FAT_filetime_getDateFromRTC (void) { +#ifdef NDS + int year, month, day; + struct rtc time; + + ds2_getTime(&time); + + year = time.year; + month = time.month; + day = time.day; + + if ((year < MIN_YEAR) || (year > MAX_YEAR)) return 0; + if ((month < MIN_MONTH) || (month > MAX_MONTH)) return 0; + if ((day < MIN_DAY) || (day > MAX_DAY)) return 0; + + return ( + (((year + 20) & 0x7F) <<9) | // Adjust for MS-FAT base year (1980 vs 2000 for DS clock) + ((month & 0xF) << 5) | + (day & 0x1F) + ); +#else + return 0; +#endif +} + +time_t _FAT_filetime_to_time_t (u16 time, u16 date) { + int hour, minute, second; + int day, month, year; + + time_t result; + + hour = time >> 11; + minute = (time >> 5) & 0x3F; + second = (time & 0x1F) << 1; + + day = date & 0x1F; + month = (date >> 5) & 0x0F; + year = date >> 9; + + // Second values are averages, so time value won't be 100% accurate, + // but should be within the correct month. + result = second + + minute * SECONDS_PER_MINUTE + + hour * SECONDS_PER_HOUR + + day * SECONDS_PER_DAY + + month * SECONDS_PER_MONTH + + year * SECONDS_PER_YEAR + ; + + return result; +} |