WIP: SPV Remapper: add remapper test framework

gtests/TestFixture.cpp

@@ -116,6 +116,32 @@ std::pair<bool, std::string> ReadFile(const std::string& path)
     return std::make_pair(false, "");
 }
 
+std::pair<bool, std::vector<std::uint32_t> > ReadSpvBinaryFile(const std::string& path)
+{
+    std::ifstream fstream(path, std::fstream::in | std::fstream::binary);
+
+    if (!fstream)
+        return std::make_pair(false, std::vector<std::uint32_t>());
+
+    std::vector<std::uint32_t> contents;
+
+    // Reserve space (for efficiency, not for correctness)
+    fstream.seekg(0, fstream.end);
+    contents.reserve(size_t(fstream.tellg()) / sizeof(std::uint32_t));
+    fstream.seekg(0, fstream.beg);
+
+    // There is no istream iterator traversing by uint32_t, so we must loop.
+    while (!fstream.eof()) {
+        std::uint32_t inWord;
+        fstream.read((char *)&inWord, sizeof(inWord));
+
+        if (!fstream.eof())
+            contents.push_back(inWord);
+    }
+
+    return std::make_pair(true, contents); // hopefully, c++11 move semantics optimizes the copy away.
+}
+
 bool WriteFile(const std::string& path, const std::string& contents)
 {
     std::ofstream fstream(path, std::ios::out);