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//
// 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.cpp: Implements the egl::Error and gl::Error classes which encapsulate API errors
// and optional error messages.

#include "libANGLE/Error.h"

#include "common/angleutils.h"

#include <cstdarg>

namespace gl
{

Error::Error(GLenum errorCode, const char *msg, ...) : mCode(errorCode), mID(errorCode)
{
    va_list vararg;
    va_start(vararg, msg);
    createMessageString();
    *mMessage = FormatString(msg, vararg);
    va_end(vararg);
}

Error::Error(GLenum errorCode, GLuint id, const char *msg, ...) : mCode(errorCode), mID(id)
{
    va_list vararg;
    va_start(vararg, msg);
    createMessageString();
    *mMessage = FormatString(msg, vararg);
    va_end(vararg);
}

void Error::createMessageString() const
{
    if (!mMessage)
    {
        mMessage.reset(new std::string);
    }
}

const std::string &Error::getMessage() const
{
    createMessageString();
    return *mMessage;
}

bool Error::operator==(const Error &other) const
{
    if (mCode != other.mCode)
        return false;

    // TODO(jmadill): Compare extended error codes instead of strings.
    if ((!mMessage || !other.mMessage) && (!mMessage != !other.mMessage))
        return false;

    return (*mMessage == *other.mMessage);
}

bool Error::operator!=(const Error &other) const
{
    return !(*this == other);
}
}

namespace egl
{

Error::Error(EGLint errorCode, const char *msg, ...) : mCode(errorCode), mID(0)
{
    va_list vararg;
    va_start(vararg, msg);
    createMessageString();
    *mMessage = FormatString(msg, vararg);
    va_end(vararg);
}

Error::Error(EGLint errorCode, EGLint id, const char *msg, ...) : mCode(errorCode), mID(id)
{
    va_list vararg;
    va_start(vararg, msg);
    createMessageString();
    *mMessage = FormatString(msg, vararg);
    va_end(vararg);
}

void Error::createMessageString() const
{
    if (!mMessage)
    {
        mMessage.reset(new std::string);
    }
}

const std::string &Error::getMessage() const
{
    createMessageString();
    return *mMessage;
}

}