Improve string splitting

String splitting is something that we often have to do but our support
code for doing so is not the best. Add support for using
std::string_view in many circumstances and add support for making an
iterator of splits without allocation.

Test: ./test.py --host
Change-Id: I1b56b7e10926a064b64011326b508dd4af707df9

1 files changed, 10 insertions, 1 deletions

diff --git a/libartbase/base/utils.h b/libartbase/base/utils.h
index 66a5699519..7160302daa 100644
--- a/libartbase/base/utils.h
+++ b/libartbase/base/utils.h
@@ -44,7 +44,16 @@ std::string PrettySize(uint64_t size_in_bytes);
 
 // Splits a string using the given separator character into a vector of
 // strings. Empty strings will be omitted.
-void Split(const std::string& s, char separator, std::vector<std::string>* result);
+template<typename StrIn, typename Str>
+void Split(const StrIn& s, char separator, std::vector<Str>* out_result);
+
+template<typename Str>
+void Split(const Str& s, char separator, size_t len, Str* out_result);
+
+template<typename StrIn, typename Str, size_t kLen>
+void Split(const StrIn& s, char separator, std::array<Str, kLen>* out_result) {
+  Split<Str>(Str(s), separator, kLen, &((*out_result)[0]));
+}
 
 // Returns the calling thread's tid. (The C libraries don't expose this.)
 uint32_t GetTid();