lots of work on determinism in the linux driver.

luprex/core/cpp/util.hpp

@@ -100,10 +100,18 @@ int64_t strtoint(const std::string &value, int64_t errval);
 // String to double.  Returns NAN if the number is not parseable.
 double strtodouble(const std::string &value);
 
+// Trim a string_view
+std::string_view sv_ltrim(std::string_view v);
+std::string_view sv_rtrim(std::string_view v);
+std::string_view sv_trim(std::string_view v);
+
 // Trim strings: left end, right end, both ends.
-std::string ltrim(std::string s);
-std::string rtrim(std::string s);
-std::string trim(std::string s);
+std::string ltrim(std::string_view s);
+std::string rtrim(std::string_view s);
+std::string trim(std::string_view s);
+
+// Read a line from a string_view
+std::string_view sv_read_line(std::string_view &source);
 
 // Calculate distance between two points
 double distance_squared(double x1, double y1, double x2, double y2);