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//
// Copyright (c) 2002-2014 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.
//
// angleutils.h: Common ANGLE utilities.
#ifndef COMMON_ANGLEUTILS_H_
#define COMMON_ANGLEUTILS_H_
#include "common/platform.h"
#include <climits>
#include <cstdarg>
#include <cstddef>
#include <string>
#include <set>
#include <sstream>
#include <vector>
// A helper class to disallow copy and assignment operators
namespace angle
{
class NonCopyable
{
public:
NonCopyable() = default;
~NonCopyable() = default;
protected:
NonCopyable(const NonCopyable&) = delete;
void operator=(const NonCopyable&) = delete;
};
extern const uintptr_t DirtyPointer;
}
template <typename T, size_t N>
inline size_t ArraySize(T(&)[N])
{
return N;
}
template <typename T, unsigned int N>
void SafeRelease(T (&resourceBlock)[N])
{
for (unsigned int i = 0; i < N; i++)
{
SafeRelease(resourceBlock[i]);
}
}
template <typename T>
void SafeRelease(T& resource)
{
if (resource)
{
resource->Release();
resource = NULL;
}
}
template <typename T>
void SafeDelete(T*& resource)
{
delete resource;
resource = NULL;
}
template <typename T>
void SafeDeleteContainer(T& resource)
{
for (auto &element : resource)
{
SafeDelete(element);
}
resource.clear();
}
template <typename T>
void SafeDeleteArray(T*& resource)
{
delete[] resource;
resource = NULL;
}
// Provide a less-than function for comparing structs
// Note: struct memory must be initialized to zero, because of packing gaps
template <typename T>
inline bool StructLessThan(const T &a, const T &b)
{
return (memcmp(&a, &b, sizeof(T)) < 0);
}
// Provide a less-than function for comparing structs
// Note: struct memory must be initialized to zero, because of packing gaps
template <typename T>
inline bool StructEquals(const T &a, const T &b)
{
return (memcmp(&a, &b, sizeof(T)) == 0);
}
template <typename T>
inline void StructZero(T *obj)
{
memset(obj, 0, sizeof(T));
}
template <typename T>
inline bool IsMaskFlagSet(T mask, T flag)
{
// Handles multibit flags as well
return (mask & flag) == flag;
}
inline const char* MakeStaticString(const std::string &str)
{
static std::set<std::string> strings;
std::set<std::string>::iterator it = strings.find(str);
if (it != strings.end())
{
return it->c_str();
}
return strings.insert(str).first->c_str();
}
inline std::string ArrayString(unsigned int i)
{
// We assume UINT_MAX and GL_INVALID_INDEX are equal
// See DynamicHLSL.cpp
if (i == UINT_MAX)
{
return "";
}
std::stringstream strstr;
strstr << "[";
strstr << i;
strstr << "]";
return strstr.str();
}
inline std::string Str(int i)
{
std::stringstream strstr;
strstr << i;
return strstr.str();
}
size_t FormatStringIntoVector(const char *fmt, va_list vararg, std::vector<char>& buffer);
std::string FormatString(const char *fmt, va_list vararg);
std::string FormatString(const char *fmt, ...);
// snprintf is not defined with MSVC prior to to msvc14
#if defined(_MSC_VER) && _MSC_VER < 1900
#define snprintf _snprintf
#endif
#define GL_BGRA4_ANGLEX 0x6ABC
#define GL_BGR5_A1_ANGLEX 0x6ABD
#define GL_INT_64_ANGLEX 0x6ABE
#define GL_STRUCT_ANGLEX 0x6ABF
// Hidden enum for the NULL D3D device type.
#define EGL_PLATFORM_ANGLE_DEVICE_TYPE_NULL_ANGLE 0x6AC0
#endif // COMMON_ANGLEUTILS_H_
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