diff options
Diffstat (limited to 'src/lib/time-util.c')
| -rw-r--r-- | src/lib/time-util.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/src/lib/time-util.c b/src/lib/time-util.c new file mode 100644 index 0000000..3f4cd01 --- /dev/null +++ b/src/lib/time-util.c @@ -0,0 +1,169 @@ +/* Copyright (c) 2008-2018 Dovecot authors, see the included COPYING file */ + +#include "lib.h" +#include "time-util.h" + +#include <time.h> + +#define STRFTIME_MAX_BUFSIZE (1024*64) + +void i_gettimeofday(struct timeval *tv_r) +{ + if (gettimeofday(tv_r, NULL) < 0) + i_fatal("gettimeofday() failed: %m"); +} + +uint64_t i_nanoseconds(void) +{ + struct timespec ts; + + if (clock_gettime(CLOCK_REALTIME, &ts) < 0) + i_fatal("clock_gettime() failed: %m"); + return ts.tv_sec * 1000000000ULL + ts.tv_nsec; +} + +int timeval_cmp(const struct timeval *tv1, const struct timeval *tv2) +{ + if (tv1->tv_sec < tv2->tv_sec) + return -1; + if (tv1->tv_sec > tv2->tv_sec) + return 1; + if (tv1->tv_usec < tv2->tv_usec) + return -1; + if (tv1->tv_usec > tv2->tv_usec) + return 1; + return 0; +} + +int timeval_cmp_margin(const struct timeval *tv1, const struct timeval *tv2, + unsigned int usec_margin) +{ + long long secs_diff, usecs_diff; + int sec_margin, ret; + + if (tv1->tv_sec < tv2->tv_sec) { + sec_margin = ((int)usec_margin / 1000000) + 1; + secs_diff = (long long)tv2->tv_sec - (long long)tv1->tv_sec; + if (secs_diff > sec_margin) + return -1; + usecs_diff = secs_diff * 1000000LL + + (tv2->tv_usec - tv1->tv_usec); + ret = -1; + } else if (tv1->tv_sec > tv2->tv_sec) { + sec_margin = ((int)usec_margin / 1000000) + 1; + secs_diff = (long long)tv1->tv_sec - (long long)tv2->tv_sec; + if (secs_diff > sec_margin) + return 1; + usecs_diff = secs_diff * 1000000LL + + (tv1->tv_usec - tv2->tv_usec); + ret = 1; + } else if (tv1->tv_usec < tv2->tv_usec) { + usecs_diff = tv2->tv_usec - tv1->tv_usec; + ret = -1; + } else { + usecs_diff = tv1->tv_usec - tv2->tv_usec; + ret = 1; + } + i_assert(usecs_diff >= 0); + return (unsigned long long)usecs_diff > usec_margin ? ret : 0; +} + +int timeval_diff_msecs(const struct timeval *tv1, const struct timeval *tv2) +{ + long long diff = timeval_diff_usecs(tv1, tv2) / 1000LL; +#ifdef DEBUG + /* FIXME v2.4: Remove the ifdef */ + i_assert(diff <= INT_MAX); +#endif + return (int)diff; +} + +long long timeval_diff_usecs(const struct timeval *tv1, + const struct timeval *tv2) +{ + time_t secs; + int usecs; + + secs = tv1->tv_sec - tv2->tv_sec; + usecs = tv1->tv_usec - tv2->tv_usec; + if (usecs < 0) { + secs--; + usecs += 1000000; + } + return ((long long)secs * 1000000LL) + usecs; +} + +time_t time_to_local_day_start(time_t t) +{ + const struct tm *day_tm; + struct tm tm; + time_t new_start_time; + + day_tm = localtime(&t); + i_zero(&tm); + tm.tm_year = day_tm->tm_year; + tm.tm_mon = day_tm->tm_mon; + tm.tm_mday = day_tm->tm_mday; + tm.tm_isdst = -1; + new_start_time = mktime(&tm); + i_assert(new_start_time != (time_t)-1); + return new_start_time; +} + +static const char *strftime_real(const char *fmt, const struct tm *tm) +{ + size_t bufsize = strlen(fmt) + 32; + char *buf = t_buffer_get(bufsize); + size_t ret; + + while ((ret = strftime(buf, bufsize, fmt, tm)) == 0) { + bufsize *= 2; + i_assert(bufsize <= STRFTIME_MAX_BUFSIZE); + buf = t_buffer_get(bufsize); + } + t_buffer_alloc(ret + 1); + return buf; +} + +const char *t_strftime(const char *fmt, const struct tm *tm) +{ + return strftime_real(fmt, tm); +} + +const char *t_strflocaltime(const char *fmt, time_t t) +{ + return strftime_real(fmt, localtime(&t)); +} + +const char *t_strfgmtime(const char *fmt, time_t t) +{ + return strftime_real(fmt, gmtime(&t)); +} + +int str_to_timeval(const char *str, struct timeval *tv_r) +{ + tv_r->tv_usec = 0; + + const char *p = strchr(str, '.'); + if (p == NULL) + return str_to_time(str, &tv_r->tv_sec); + + int ret; + T_BEGIN { + ret = str_to_time(t_strdup_until(str, p++), &tv_r->tv_sec); + } T_END; + if (ret < 0 || p[0] == '\0') + return -1; + + unsigned int len = strlen(p); + if (len > 6) + return -1; /* we don't support sub-microseconds */ + char usecs_str[7] = "000000"; + memcpy(usecs_str, p, len); + + unsigned int usec; + if (str_to_uint(usecs_str, &usec) < 0) + return -1; + tv_r->tv_usec = usec; + return 0; +} |