libandroidfw: move ConfigDescription from aapt2 to libandroidfw

This is to allow idmap2 to access ConfigDescription.

Test: libandroidfw_tests
Test: aapt2_tests
Change-Id: I54210bbbd8dad5903cb7100807df977efa394ad5

1 files changed, 24 insertions, 0 deletions

diff --git a/libs/androidfw/Util.cpp b/libs/androidfw/Util.cpp
index 575cd18a36dd..59c9d640bb91 100644
--- a/libs/androidfw/Util.cpp
+++ b/libs/androidfw/Util.cpp
@@ -16,6 +16,7 @@
 
 #include "androidfw/Util.h"
 
+#include <algorithm>
 #include <string>
 
 #include "utils/ByteOrder.h"
@@ -67,5 +68,28 @@ std::string Utf16ToUtf8(const StringPiece16& utf16) {
   return utf8;
 }
 
+static std::vector<std::string> SplitAndTransform(
+    const StringPiece& str, char sep, const std::function<char(char)>& f) {
+  std::vector<std::string> parts;
+  const StringPiece::const_iterator end = std::end(str);
+  StringPiece::const_iterator start = std::begin(str);
+  StringPiece::const_iterator current;
+  do {
+    current = std::find(start, end, sep);
+    parts.emplace_back(str.substr(start, current).to_string());
+    if (f) {
+      std::string& part = parts.back();
+      std::transform(part.begin(), part.end(), part.begin(), f);
+    }
+    start = current + 1;
+  } while (current != end);
+  return parts;
+}
+
+std::vector<std::string> SplitAndLowercase(const StringPiece& str, char sep) {
+  return SplitAndTransform(str, sep, ::tolower);
+}
+
+
 } // namespace util
 } // namespace android