1 files changed, 146 insertions, 0 deletions
diff --git a/gfx/angle/src/libANGLE/Error.h b/gfx/angle/src/libANGLE/Error.h
new file mode 100755
index 000000000..de3a50eb0
--- /dev/null
+++ b/gfx/angle/src/libANGLE/Error.h
@@ -0,0 +1,146 @@
+//
+// Copyright (c) 2014 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.
+
+// Error.h: Defines the egl::Error and gl::Error classes which encapsulate API errors
+// and optional error messages.
+
+#ifndef LIBANGLE_ERROR_H_
+#define LIBANGLE_ERROR_H_
+
+#include "angle_gl.h"
+#include <EGL/egl.h>
+
+#include <string>
+#include <memory>
+
+namespace gl
+{
+
+class Error final
+{
+  public:
+    explicit inline Error(GLenum errorCode);
+    Error(GLenum errorCode, const char *msg, ...);
+    Error(GLenum errorCode, GLuint id, const char *msg, ...);
+    inline Error(const Error &other);
+    inline Error(Error &&other);
+
+    inline Error &operator=(const Error &other);
+    inline Error &operator=(Error &&other);
+
+    inline GLenum getCode() const;
+    inline GLuint getID() const;
+    inline bool isError() const;
+
+    const std::string &getMessage() const;
+
+    // Useful for mocking and testing
+    bool operator==(const Error &other) const;
+    bool operator!=(const Error &other) const;
+
+  private:
+    void createMessageString() const;
+
+    GLenum mCode;
+    GLuint mID;
+    mutable std::unique_ptr<std::string> mMessage;
+};
+
+template <typename T>
+class ErrorOrResult
+{
+  public:
+    ErrorOrResult(const gl::Error &error) : mError(error) {}
+    ErrorOrResult(gl::Error &&error) : mError(std::move(error)) {}
+
+    ErrorOrResult(T &&result)
+        : mError(GL_NO_ERROR), mResult(std::forward<T>(result))
+    {
+    }
+
+    ErrorOrResult(const T &result)
+        : mError(GL_NO_ERROR), mResult(result)
+    {
+    }
+
+    bool isError() const { return mError.isError(); }
+    const gl::Error &getError() const { return mError; }
+    T &&getResult() { return std::move(mResult); }
+
+  private:
+    Error mError;
+    T mResult;
+};
+
+inline Error NoError()
+{
+    return Error(GL_NO_ERROR);
+}
+
+}  // namespace gl
+
+namespace egl
+{
+
+class Error final
+{
+  public:
+    explicit inline Error(EGLint errorCode);
+    Error(EGLint errorCode, const char *msg, ...);
+    Error(EGLint errorCode, EGLint id, const char *msg, ...);
+    inline Error(const Error &other);
+    inline Error(Error &&other);
+
+    inline Error &operator=(const Error &other);
+    inline Error &operator=(Error &&other);
+
+    inline EGLint getCode() const;
+    inline EGLint getID() const;
+    inline bool isError() const;
+
+    const std::string &getMessage() const;
+
+  private:
+    void createMessageString() const;
+
+    EGLint mCode;
+    EGLint mID;
+    mutable std::unique_ptr<std::string> mMessage;
+};
+
+}  // namespace egl
+
+#define ANGLE_CONCAT1(x, y) x##y
+#define ANGLE_CONCAT2(x, y) ANGLE_CONCAT1(x, y)
+#define ANGLE_LOCAL_VAR ANGLE_CONCAT2(_localVar, __LINE__)
+
+#define ANGLE_TRY(EXPR)                \
+    {                                  \
+        auto ANGLE_LOCAL_VAR = EXPR;   \
+        if (ANGLE_LOCAL_VAR.isError()) \
+        {                              \
+            return ANGLE_LOCAL_VAR;    \
+        }                              \
+    }                                  \
+    ANGLE_EMPTY_STATEMENT
+
+#define ANGLE_TRY_RESULT(EXPR, RESULT)         \
+    {                                          \
+        auto ANGLE_LOCAL_VAR = EXPR;           \
+        if (ANGLE_LOCAL_VAR.isError())         \
+        {                                      \
+            return ANGLE_LOCAL_VAR.getError(); \
+        }                                      \
+        RESULT = ANGLE_LOCAL_VAR.getResult();  \
+    }                                          \
+    ANGLE_EMPTY_STATEMENT
+
+#undef ANGLE_LOCAL_VAR
+#undef ANGLE_CONCAT2
+#undef ANGLE_CONCAT1
+
+#include "Error.inl"
+
+#endif // LIBANGLE_ERROR_H_