diff options
Diffstat (limited to 'e-util/e-time-utils.c')
| -rw-r--r-- | e-util/e-time-utils.c | 61 |
1 files changed, 56 insertions, 5 deletions
diff --git a/e-util/e-time-utils.c b/e-util/e-time-utils.c index f91695f977..ecc3fc9602 100644 --- a/e-util/e-time-utils.c +++ b/e-util/e-time-utils.c @@ -10,13 +10,17 @@ #include <config.h> -/* We need this for strptime. */ -#define _XOPEN_SOURCE 500 -#define __USE_XOPEN +#ifdef __linux__ +/* We need this to get a prototype for strptime. */ +#define _GNU_SOURCE +#endif /* __linux__ */ + #include <time.h> #include <sys/time.h> -#undef _XOPEN_SOURCE -#undef __USE_XOPEN + +#ifdef __linux__ +#undef _GNU_SOURCE +#endif /* __linux__ */ #include <string.h> #include <ctype.h> @@ -426,3 +430,50 @@ e_time_format_time (struct tm *date_tm, if (strftime (buffer, buffer_size, format, date_tm) == 0) buffer[0] = '\0'; } + + +/* Like mktime(3), but assumes UTC instead of local timezone. */ +time_t +e_mktime_utc (struct tm *tm) +{ + time_t tt; + + tm->tm_isdst = -1; + tt = mktime (tm); + +#if defined (HAVE_TM_GMTOFF) + tt += tm->tm_gmtoff; +#elif defined (HAVE_TIMEZONE) + if (tm->tm_isdst > 0) { + #if defined (HAVE_ALTZONE) + tt -= altzone; + #else /* !defined (HAVE_ALTZONE) */ + tt -= (timezone - 3600); + #endif + } else + tt -= timezone; +#endif + + return tt; +} + +/* Like localtime_r(3), but also returns an offset in minutes after UTC. + (Calling gmtime with tt + offset would generate the same tm) */ +void +e_localtime_with_offset (time_t tt, struct tm *tm, int *offset) +{ + localtime_r (&tt, tm); + +#if defined (HAVE_TM_GMTOFF) + *offset = tm->tm_gmtoff; +#elif defined (HAVE_TIMEZONE) + if (tm->tm_isdst > 0) { + #if defined (HAVE_ALTZONE) + *offset = -altzone; + #else /* !defined (HAVE_ALTZONE) */ + *offset = -(timezone - 3600); + #endif + } else + *offset = -timezone; +#endif +} |