X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=src%2Fcommon%2Futils.c;h=08139e5e2cb23d691c92c6800cef841e2362bc57;hb=c7031a2c707646804e0088d069578d5eb74fc01e;hp=3f74e1fae3c21487e71e8a6aeec3be1a38558677;hpb=857f0d94259cbe44649a16a8c098658352b97fa9;p=lttng-tools.git

diff --git a/src/common/utils.c b/src/common/utils.c
index 3f74e1fae..08139e5e2 100644
--- a/src/common/utils.c
+++ b/src/common/utils.c
@@ -41,6 +41,7 @@
 
 #include "utils.h"
 #include "defaults.h"
+#include "time.h"
 
 /*
  * Return a partial realpath(3) of the path even if the full path does not
@@ -197,7 +198,7 @@ error:
 }
 
 static
-char *expand_double_slashes_dot_and_dotdot(char *path)
+int expand_double_slashes_dot_and_dotdot(char *path)
 {
 	size_t expanded_path_len, path_len;
 	const char *curr_char, *path_last_char, *next_slash, *prev_slash;
@@ -206,7 +207,6 @@ char *expand_double_slashes_dot_and_dotdot(char *path)
 	path_last_char = &path[path_len];
 
 	if (path_len == 0) {
-		path = NULL;
 		goto error;
 	}
 
@@ -292,9 +292,9 @@ char *expand_double_slashes_dot_and_dotdot(char *path)
 	}
 
 	path[expanded_path_len] = '\0';
-
+	return 0;
 error:
-	return path;
+	return -1;
 }
 
 /*
@@ -313,7 +313,7 @@ char *_utils_expand_path(const char *path, bool keep_symlink)
 	int ret;
 	char *absolute_path = NULL;
 	char *last_token;
-	int is_dot, is_dotdot;
+	bool is_dot, is_dotdot;
 
 	/* Safety net */
 	if (path == NULL) {
@@ -364,8 +364,8 @@ char *_utils_expand_path(const char *path, bool keep_symlink)
 				absolute_path, LTTNG_PATH_MAX);
 	}
 
-	absolute_path = expand_double_slashes_dot_and_dotdot(absolute_path);
-	if (!absolute_path) {
+	ret = expand_double_slashes_dot_and_dotdot(absolute_path);
+	if (ret) {
 		goto error;
 	}
 
@@ -1646,3 +1646,38 @@ int utils_show_help(int section, const char *page_name,
 end:
 	return ret;
 }
+
+LTTNG_HIDDEN
+int timespec_to_ms(struct timespec ts, unsigned long *ms)
+{
+	unsigned long res, remain_ms;
+
+	if (ts.tv_sec > ULONG_MAX / MSEC_PER_SEC) {
+		errno = EOVERFLOW;
+		return -1;	/* multiplication overflow */
+	}
+	res = ts.tv_sec * MSEC_PER_SEC;
+	remain_ms = ULONG_MAX - res;
+	if (ts.tv_nsec / NSEC_PER_MSEC > remain_ms) {
+		errno = EOVERFLOW;
+		return -1;	/* addition overflow */
+	}
+	res += ts.tv_nsec / NSEC_PER_MSEC;
+	*ms = res;
+	return 0;
+}
+
+LTTNG_HIDDEN
+struct timespec timespec_abs_diff(struct timespec t1, struct timespec t2)
+{
+	uint64_t ts1 = (uint64_t) t1.tv_sec * (uint64_t) NSEC_PER_SEC +
+			(uint64_t) t1.tv_nsec;
+	uint64_t ts2 = (uint64_t) t2.tv_sec * (uint64_t) NSEC_PER_SEC +
+			(uint64_t) t2.tv_nsec;
+	uint64_t diff = max(ts1, ts2) - min(ts1, ts2);
+	struct timespec res;
+
+	res.tv_sec = diff / (uint64_t) NSEC_PER_SEC;
+	res.tv_nsec = diff % (uint64_t) NSEC_PER_SEC;
+	return res;
+}