1 files changed, 90 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/libANGLE/InfoLog.h b/gfx/angle/checkout/src/libANGLE/InfoLog.h
new file mode 100644
index 0000000000..53333ea1aa
--- /dev/null
+++ b/gfx/angle/checkout/src/libANGLE/InfoLog.h
@@ -0,0 +1,90 @@
+//
+// Copyright 2020 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// InfoLog.h: Defines the gl::InfoLog class to handle the logs generated when
+// compiling/linking shaders so useful error messages can be returned to the caller.
+
+#ifndef LIBANGLE_INFOLOG_H_
+#define LIBANGLE_INFOLOG_H_
+
+namespace gl
+{
+
+class InfoLog : angle::NonCopyable
+{
+  public:
+    InfoLog();
+    ~InfoLog();
+
+    size_t getLength() const;
+    void getLog(GLsizei bufSize, GLsizei *length, char *infoLog) const;
+
+    void appendSanitized(const char *message);
+    void reset();
+
+    // This helper class ensures we append a newline after writing a line.
+    class StreamHelper : angle::NonCopyable
+    {
+      public:
+        StreamHelper(StreamHelper &&rhs) : mStream(rhs.mStream) { rhs.mStream = nullptr; }
+
+        StreamHelper &operator=(StreamHelper &&rhs)
+        {
+            std::swap(mStream, rhs.mStream);
+            return *this;
+        }
+
+        ~StreamHelper()
+        {
+            // Write newline when destroyed on the stack
+            if (mStream && !mStream->str().empty())
+            {
+                (*mStream) << std::endl;
+            }
+        }
+
+        template <typename T>
+        StreamHelper &operator<<(const T &value)
+        {
+            (*mStream) << value;
+            return *this;
+        }
+
+      private:
+        friend class InfoLog;
+
+        StreamHelper(std::stringstream *stream) : mStream(stream) { ASSERT(stream); }
+
+        std::stringstream *mStream;
+    };
+
+    template <typename T>
+    StreamHelper operator<<(const T &value)
+    {
+        ensureInitialized();
+        StreamHelper helper(mLazyStream.get());
+        helper << value;
+        return helper;
+    }
+
+    std::string str() const { return mLazyStream ? mLazyStream->str() : ""; }
+
+    bool empty() const;
+
+  private:
+    void ensureInitialized()
+    {
+        if (!mLazyStream)
+        {
+            mLazyStream.reset(new std::stringstream());
+        }
+    }
+
+    std::unique_ptr<std::stringstream> mLazyStream;
+};
+
+}  // namespace gl
+
+#endif  // LIBANGLE_INFOLOG_H_