| 1 | /* |
| 2 | * Copyright (C) 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: LGPL-2.1-only |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include <common/compat/errno.hpp> |
| 9 | #include <common/error.hpp> |
| 10 | #include <common/exception.hpp> |
| 11 | #include <common/macros.hpp> |
| 12 | #include <common/time.hpp> |
| 13 | |
| 14 | #include <algorithm> |
| 15 | #include <limits.h> |
| 16 | #include <locale.h> |
| 17 | #include <pthread.h> |
| 18 | #include <stddef.h> |
| 19 | #include <stdint.h> |
| 20 | #include <string.h> |
| 21 | |
| 22 | static bool utf8_output_supported; |
| 23 | |
| 24 | bool locale_supports_utf8(void) |
| 25 | { |
| 26 | return utf8_output_supported; |
| 27 | } |
| 28 | |
| 29 | int timespec_to_ms(struct timespec ts, unsigned long *ms) |
| 30 | { |
| 31 | unsigned long res, remain_ms; |
| 32 | |
| 33 | if (ts.tv_sec > ULONG_MAX / MSEC_PER_SEC) { |
| 34 | errno = EOVERFLOW; |
| 35 | return -1; /* multiplication overflow */ |
| 36 | } |
| 37 | res = ts.tv_sec * MSEC_PER_SEC; |
| 38 | remain_ms = ULONG_MAX - res; |
| 39 | if (ts.tv_nsec / NSEC_PER_MSEC > remain_ms) { |
| 40 | errno = EOVERFLOW; |
| 41 | return -1; /* addition overflow */ |
| 42 | } |
| 43 | res += ts.tv_nsec / NSEC_PER_MSEC; |
| 44 | *ms = res; |
| 45 | return 0; |
| 46 | } |
| 47 | |
| 48 | struct timespec timespec_abs_diff(struct timespec t1, struct timespec t2) |
| 49 | { |
| 50 | uint64_t ts1 = (uint64_t) t1.tv_sec * (uint64_t) NSEC_PER_SEC + |
| 51 | (uint64_t) t1.tv_nsec; |
| 52 | uint64_t ts2 = (uint64_t) t2.tv_sec * (uint64_t) NSEC_PER_SEC + |
| 53 | (uint64_t) t2.tv_nsec; |
| 54 | uint64_t diff = std::max(ts1, ts2) - std::min(ts1, ts2); |
| 55 | struct timespec res; |
| 56 | |
| 57 | res.tv_sec = diff / (uint64_t) NSEC_PER_SEC; |
| 58 | res.tv_nsec = diff % (uint64_t) NSEC_PER_SEC; |
| 59 | return res; |
| 60 | } |
| 61 | |
| 62 | static |
| 63 | void __attribute__((constructor)) init_locale_utf8_support(void) |
| 64 | { |
| 65 | const char *program_locale = setlocale(LC_ALL, NULL); |
| 66 | const char *lang = getenv("LANG"); |
| 67 | |
| 68 | if (program_locale && strstr(program_locale, "utf8")) { |
| 69 | utf8_output_supported = true; |
| 70 | } else if (lang && strstr(lang, "utf8")) { |
| 71 | utf8_output_supported = true; |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | int time_to_iso8601_str(time_t time, char *str, size_t len) |
| 76 | { |
| 77 | int ret = 0; |
| 78 | struct tm *tm_result; |
| 79 | struct tm tm_storage; |
| 80 | size_t strf_ret; |
| 81 | |
| 82 | if (len < ISO8601_STR_LEN) { |
| 83 | ERR("Buffer too short to format ISO 8601 timestamp: %zu bytes provided when at least %zu are needed", |
| 84 | len, ISO8601_STR_LEN); |
| 85 | ret = -1; |
| 86 | goto end; |
| 87 | } |
| 88 | |
| 89 | tm_result = localtime_r(&time, &tm_storage); |
| 90 | if (!tm_result) { |
| 91 | ret = -1; |
| 92 | PERROR("Failed to break down timestamp to tm structure"); |
| 93 | goto end; |
| 94 | } |
| 95 | |
| 96 | strf_ret = strftime(str, len, "%Y%m%dT%H%M%S%z", tm_result); |
| 97 | if (strf_ret == 0) { |
| 98 | ret = -1; |
| 99 | ERR("Failed to format timestamp as local time"); |
| 100 | goto end; |
| 101 | } |
| 102 | end: |
| 103 | return ret; |
| 104 | } |
| 105 | |
| 106 | int time_to_datetime_str(time_t time, char *str, size_t len) |
| 107 | { |
| 108 | int ret = 0; |
| 109 | struct tm *tm_result; |
| 110 | struct tm tm_storage; |
| 111 | size_t strf_ret; |
| 112 | |
| 113 | if (len < DATETIME_STR_LEN) { |
| 114 | ERR("Buffer too short to format to datetime: %zu bytes provided when at least %zu are needed", |
| 115 | len, DATETIME_STR_LEN); |
| 116 | ret = -1; |
| 117 | goto end; |
| 118 | } |
| 119 | |
| 120 | tm_result = localtime_r(&time, &tm_storage); |
| 121 | if (!tm_result) { |
| 122 | ret = -1; |
| 123 | PERROR("Failed to break down timestamp to tm structure"); |
| 124 | goto end; |
| 125 | } |
| 126 | |
| 127 | strf_ret = strftime(str, len, "%Y%m%d-%H%M%S", tm_result); |
| 128 | if (strf_ret == 0) { |
| 129 | ret = -1; |
| 130 | ERR("Failed to format timestamp as local time"); |
| 131 | goto end; |
| 132 | } |
| 133 | end: |
| 134 | return ret; |
| 135 | } |
| 136 | |
| 137 | std::string lttng::utils::time_to_iso8601_str(std::time_t time) |
| 138 | { |
| 139 | std::string iso8601_str(ISO8601_STR_LEN, '\0'); |
| 140 | const auto ret = ::time_to_iso8601_str(time, &iso8601_str[0], iso8601_str.capacity()); |
| 141 | |
| 142 | if (ret) { |
| 143 | LTTNG_THROW_ERROR("Failed to format time to iso8601 format"); |
| 144 | } |
| 145 | |
| 146 | /* Don't include '\0' in the C++ string. */ |
| 147 | iso8601_str.resize(iso8601_str.size() - 1); |
| 148 | |
| 149 | return iso8601_str; |
| 150 | } |