X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Ftime.c;h=90ce4d4b67694bd046b3ddd589bf27e9644d1231;hp=5c5594584dc6ae37c59ab44625ca7ad9b8c9534d;hb=0db0f8e075e3790a2707736d2a4d086b123f3160;hpb=507f56949c928c084e647fa88498b823aeab585d

diff --git a/src/common/time.c b/src/common/time.c
index 5c5594584..90ce4d4b6 100644
--- 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 <common/compat/errno.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;
+}