[core] cache binary shaders on Android

2 files changed, 13 insertions, 0 deletions

diff --git a/src/mbgl/util/io.cpp b/src/mbgl/util/io.cpp
index f37ce09cff..9adc3b8988 100644
--- a/src/mbgl/util/io.cpp
+++ b/src/mbgl/util/io.cpp
@@ -32,6 +32,16 @@ std::string read_file(const std::string &filename) {
     }
 }
 
+optional<std::string> readFile(const std::string &filename) {
+    std::ifstream file(filename);
+    if (file.good()) {
+        std::stringstream data;
+        data << file.rdbuf();
+        return data.str();
+    }
+    return {};
+}
+
 void deleteFile(const std::string& filename) {
     const int ret = unlink(filename.c_str());
     if (ret == -1) {
diff --git a/src/mbgl/util/io.hpp b/src/mbgl/util/io.hpp
index 795a465328..847271acf0 100644
--- a/src/mbgl/util/io.hpp
+++ b/src/mbgl/util/io.hpp
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <mbgl/util/optional.hpp>
+
 #include <string>
 #include <stdexcept>
 
@@ -15,6 +17,7 @@ struct IOException : std::runtime_error {
 void write_file(const std::string &filename, const std::string &data);
 std::string read_file(const std::string &filename);
 
+optional<std::string> readFile(const std::string &filename);
 void deleteFile(const std::string& filename);
 
 } // namespace util