Clean-up: time: change space to tabs

[lttng-tools.git] / src / common / time.c

diff --git a/src/common/time.c b/src/common/time.c
index 5c5594584dc6ae37c59ab44625ca7ad9b8c9534d..d084a3fddbdb5c462e5246fb83b9c336c4b898e9 100644 (file)
--- a/src/common/time.c
+++ b/src/common/time.c
@@ -1,27 +1,29 @@
 /*
- * Copyright (C) 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ * Copyright (C) 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com>
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License, version 2 only, as
- * published by the Free Software Foundation.
+ * SPDX-License-Identifier: GPL-2.0-only
  *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
 #include <common/time.h>
+#include <common/error.h>
 #include <common/macros.h>
+#include <common/error.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <limits.h>
 #include <errno.h>
 #include <pthread.h>
+#include <locale.h>
+#include <string.h>
+
+static bool utf8_output_supported;
+
+LTTNG_HIDDEN
+bool locale_supports_utf8(void)
+{
+       return utf8_output_supported;
+}
 
 LTTNG_HIDDEN
 int timespec_to_ms(struct timespec ts, unsigned long *ms)
@@ -57,3 +59,80 @@ struct timespec timespec_abs_diff(struct timespec t1, struct timespec t2)
        res.tv_nsec = diff % (uint64_t) NSEC_PER_SEC;
        return res;
 }
+
+static
+void __attribute__((constructor)) init_locale_utf8_support(void)
+{
+       const char *program_locale = setlocale(LC_ALL, NULL);
+       const char *lang = getenv("LANG");
+
+       if (program_locale && strstr(program_locale, "utf8")) {
+               utf8_output_supported = true;
+       } else if (lang && strstr(lang, "utf8")) {
+               utf8_output_supported = true;
+       }
+}
+
+LTTNG_HIDDEN
+int time_to_iso8601_str(time_t time, char *str, size_t len)
+{
+       int ret = 0;
+       struct tm *tm_result;
+       struct tm tm_storage;
+       size_t strf_ret;
+
+       if (len < ISO8601_STR_LEN) {
+               ERR("Buffer too short to format ISO 8601 timestamp: %zu bytes provided when at least %zu are needed",
+                               len, ISO8601_STR_LEN);
+               ret = -1;
+               goto end;
+       }
+
+       tm_result = localtime_r(&time, &tm_storage);
+       if (!tm_result) {
+               ret = -1;
+               PERROR("Failed to break down timestamp to tm structure");
+               goto end;
+       }
+
+       strf_ret = strftime(str, len, "%Y%m%dT%H%M%S%z", tm_result);
+       if (strf_ret == 0) {
+               ret = -1;
+               ERR("Failed to format timestamp as local time");
+               goto end;
+       }
+end:
+       return ret;
+}
+
+LTTNG_HIDDEN
+int time_to_datetime_str(time_t time, char *str, size_t len)
+{
+       int ret = 0;
+       struct tm *tm_result;
+       struct tm tm_storage;
+       size_t strf_ret;
+
+       if (len < DATETIME_STR_LEN) {
+               ERR("Buffer too short to format to datetime: %zu bytes provided when at least %zu are needed",
+                               len, DATETIME_STR_LEN);
+               ret = -1;
+               goto end;
+       }
+
+       tm_result = localtime_r(&time, &tm_storage);
+       if (!tm_result) {
+               ret = -1;
+               PERROR("Failed to break down timestamp to tm structure");
+               goto end;
+       }
+
+       strf_ret = strftime(str, len, "%Y%m%d-%H%M%S", tm_result);
+       if (strf_ret == 0) {
+               ret = -1;
+               ERR("Failed to format timestamp as local time");
+               goto end;
+       }
+end:
+       return ret;
+}