[Glacier] Add a StringView class and StrSplit method.

lib/glacier/string/str_split.cpp

@@ -0,0 +1,17 @@
+#include "glacier/string/str_split.h"
+
+namespace glcr {
+
+Vector<StringView> StrSplit(const StringView& str, char delimiter) {
+  Vector<StringView> strings;
+  uint64_t cur_pos = 0;
+  uint64_t next_pos = 0;
+  while ((next_pos = str.find(delimiter, cur_pos)) != str.npos) {
+    strings.PushBack(str.substr(cur_pos, next_pos - cur_pos));
+    cur_pos = next_pos + 1;
+  }
+  strings.PushBack(str.substr(cur_pos, str.size() - cur_pos));
+  return strings;
+}
+
+}  // namespace glcr