| | 1 | /* |
| | 2 | * Copyright (c) 1997 |
| | 3 | * The Regents of the University of California. All rights reserved. |
| | 4 | * |
| | 5 | * Redistribution and use in source and binary forms, with or without |
| | 6 | * modification, are permitted provided that: (1) source code distributions |
| | 7 | * retain the above copyright notice and this paragraph in its entirety, (2) |
| | 8 | * distributions including binary code include the above copyright notice and |
| | 9 | * this paragraph in its entirety in the documentation or other materials |
| | 10 | * provided with the distribution, and (3) all advertising materials mentioning |
| | 11 | * features or use of this software display the following acknowledgement: |
| | 12 | * ``This product includes software developed by the University of California, |
| | 13 | * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of |
| | 14 | * the University nor the names of its contributors may be used to endorse |
| | 15 | * or promote products derived from this software without specific prior |
| | 16 | * written permission. |
| | 17 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
| | 18 | * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
| | 19 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| | 20 | */ |
| | 21 | |
| | 22 | #include <sys/types.h> |
| | 23 | #include <sys/time.h> |
| | 24 | |
| | 25 | #include <stdio.h> |
| | 26 | #ifdef TIME_WITH_SYS_TIME |
| | 27 | #include <time.h> |
| | 28 | #endif |
| | 29 | |
| | 30 | #ifdef HAVE_OS_PROTO_H |
| | 31 | #include "os-proto.h" |
| | 32 | #endif |
| | 33 | |
| | 34 | #include "gmt2local.h" |
| | 35 | |
| | 36 | /* |
| | 37 | * Returns the difference between gmt and local time in seconds. |
| | 38 | * Use gmtime() and localtime() to keep things simple. |
| | 39 | */ |
| | 40 | int32_t |
| | 41 | gmt2local(time_t t) |
| | 42 | { |
| | 43 | register int dt, dir; |
| | 44 | register struct tm *gmt, *loc; |
| | 45 | struct tm sgmt; |
| | 46 | |
| | 47 | if (t == 0) |
| | 48 | t = time(NULL); |
| | 49 | gmt = &sgmt; |
| | 50 | *gmt = *gmtime(&t); |
| | 51 | loc = localtime(&t); |
| | 52 | dt = (loc->tm_hour - gmt->tm_hour) * 60 * 60 + |
| | 53 | (loc->tm_min - gmt->tm_min) * 60; |
| | 54 | |
| | 55 | /* |
| | 56 | * If the year or julian day is different, we span 00:00 GMT |
| | 57 | * and must add or subtract a day. Check the year first to |
| | 58 | * avoid problems when the julian day wraps. |
| | 59 | */ |
| | 60 | dir = loc->tm_year - gmt->tm_year; |
| | 61 | if (dir == 0) |
| | 62 | dir = loc->tm_yday - gmt->tm_yday; |
| | 63 | dt += dir * 24 * 60 * 60; |
| | 64 | |
| | 65 | return (dt); |
| | 66 | } |
projects / apple / network_cmds.git / blame_incremental