#ifndef SLANG_CPP_PRELUDE_H
#define SLANG_CPP_PRELUDE_H

// Because the signiture of isnan, isfinite, and is isinf changed in C++, we use the macro
// to use the version in the std namespace. 
// https://stackoverflow.com/questions/39130040/cmath-hides-isnan-in-math-h-in-c14-c11
 
#ifdef SLANG_LLVM
#include "slang-llvm.h"
#else // SLANG_LLVM
#   if SLANG_GCC_FAMILY && __GNUC__ < 6
#       include <cmath>
#       define SLANG_PRELUDE_STD std::
#   else
#       include <math.h>
#       define SLANG_PRELUDE_STD
#   endif

#   include <assert.h>
#   include <stdlib.h>
#   include <string.h>
#   include <stdint.h>
#endif // SLANG_LLVM

#if defined(_MSC_VER)
#   define SLANG_PRELUDE_SHARED_LIB_EXPORT __declspec(dllexport)
#else
#   define SLANG_PRELUDE_SHARED_LIB_EXPORT __attribute__((__visibility__("default")))
//#   define SLANG_PRELUDE_SHARED_LIB_EXPORT __attribute__ ((dllexport)) __attribute__((__visibility__("default")))
#endif    

#ifdef __cplusplus    
#   define SLANG_PRELUDE_EXTERN_C extern "C"
#   define SLANG_PRELUDE_EXTERN_C_START extern "C" {
#   define SLANG_PRELUDE_EXTERN_C_END }
#else
#   define SLANG_PRELUDE_EXTERN_C 
#   define SLANG_PRELUDE_EXTERN_C_START
#   define SLANG_PRELUDE_EXTERN_C_END 
#endif    

#define SLANG_PRELUDE_EXPORT SLANG_PRELUDE_EXTERN_C SLANG_PRELUDE_SHARED_LIB_EXPORT
#define SLANG_PRELUDE_EXPORT_START SLANG_PRELUDE_EXTERN_C_START SLANG_PRELUDE_SHARED_LIB_EXPORT
#define SLANG_PRELUDE_EXPORT_END SLANG_PRELUDE_EXTERN_C_END

#ifndef SLANG_INFINITY
#   define SLANG_INFINITY   INFINITY
#endif

// Detect the compiler type

#ifndef SLANG_COMPILER
#    define SLANG_COMPILER

/*
Compiler defines, see http://sourceforge.net/p/predef/wiki/Compilers/
NOTE that SLANG_VC holds the compiler version - not just 1 or 0
*/
#    if defined(_MSC_VER)
#        if _MSC_VER >= 1900
#            define SLANG_VC 14
#        elif _MSC_VER >= 1800
#            define SLANG_VC 12
#        elif _MSC_VER >= 1700
#            define SLANG_VC 11
#        elif _MSC_VER >= 1600
#            define SLANG_VC 10
#        elif _MSC_VER >= 1500
#            define SLANG_VC 9
#        else
#            error "unknown version of Visual C++ compiler"
#        endif
#    elif defined(__clang__)
#        define SLANG_CLANG 1
#    elif defined(__SNC__)
#        define SLANG_SNC 1
#    elif defined(__ghs__)
#        define SLANG_GHS 1
#    elif defined(__GNUC__) /* note: __clang__, __SNC__, or __ghs__ imply __GNUC__ */
#        define SLANG_GCC 1
#    else
#        error "unknown compiler"
#    endif
/*
Any compilers not detected by the above logic are now now explicitly zeroed out.
*/
#    ifndef SLANG_VC
#        define SLANG_VC 0
#    endif
#    ifndef SLANG_CLANG
#        define SLANG_CLANG 0
#    endif
#    ifndef SLANG_SNC
#        define SLANG_SNC 0
#    endif
#    ifndef SLANG_GHS
#        define SLANG_GHS 0
#    endif
#    ifndef SLANG_GCC
#        define SLANG_GCC 0
#    endif
#endif /* SLANG_COMPILER */

/*
The following section attempts to detect the target platform being compiled for.

If an application defines `SLANG_PLATFORM` before including this header,
they take responsibility for setting any compiler-dependent macros
used later in the file.

Most applications should not need to touch this section.
*/
#ifndef SLANG_PLATFORM
#    define SLANG_PLATFORM
/**
Operating system defines, see http://sourceforge.net/p/predef/wiki/OperatingSystems/
*/
#    if defined(WINAPI_FAMILY) && WINAPI_FAMILY == WINAPI_PARTITION_APP
#        define SLANG_WINRT 1 /* Windows Runtime, either on Windows RT or Windows 8 */
#    elif defined(XBOXONE)
#        define SLANG_XBOXONE 1
#    elif defined(_WIN64) /* note: XBOXONE implies _WIN64 */
#        define SLANG_WIN64 1
#    elif defined(_M_PPC)
#        define SLANG_X360 1
#    elif defined(_WIN32) /* note: _M_PPC implies _WIN32 */
#        define SLANG_WIN32 1
#    elif defined(__ANDROID__)
#        define SLANG_ANDROID 1
#    elif defined(__linux__) || defined(__CYGWIN__) /* note: __ANDROID__ implies __linux__ */
#        define SLANG_LINUX 1
#    elif defined(__APPLE__) && !defined(SLANG_LLVM)
#        include "TargetConditionals.h"
#        if TARGET_OS_MAC
#            define SLANG_OSX 1
#        else
#            define SLANG_IOS 1
#        endif
#    elif defined(__APPLE__)
// On `slang-llvm` we can't inclue "TargetConditionals.h" in general, so for now assume its OSX.
#       define SLANG_OSX 1
#    elif defined(__CELLOS_LV2__)
#        define SLANG_PS3 1
#    elif defined(__ORBIS__)
#        define SLANG_PS4 1
#    elif defined(__SNC__) && defined(__arm__)
#        define SLANG_PSP2 1
#    elif defined(__ghs__)
#        define SLANG_WIIU 1
#    else
#        error "unknown target platform"
#    endif


/*
Any platforms not detected by the above logic are now now explicitly zeroed out.
*/
#    ifndef SLANG_WINRT
#        define SLANG_WINRT 0
#    endif
#    ifndef SLANG_XBOXONE
#        define SLANG_XBOXONE 0
#    endif
#    ifndef SLANG_WIN64
#        define SLANG_WIN64 0
#    endif
#    ifndef SLANG_X360
#        define SLANG_X360 0
#    endif
#    ifndef SLANG_WIN32
#        define SLANG_WIN32 0
#    endif
#    ifndef SLANG_ANDROID
#        define SLANG_ANDROID 0
#    endif
#    ifndef SLANG_LINUX
#        define SLANG_LINUX 0
#    endif
#    ifndef SLANG_IOS
#        define SLANG_IOS 0
#    endif
#    ifndef SLANG_OSX
#        define SLANG_OSX 0
#    endif
#    ifndef SLANG_PS3
#        define SLANG_PS3 0
#    endif
#    ifndef SLANG_PS4
#        define SLANG_PS4 0
#    endif
#    ifndef SLANG_PSP2
#        define SLANG_PSP2 0
#    endif
#    ifndef SLANG_WIIU
#        define SLANG_WIIU 0
#    endif
#endif /* SLANG_PLATFORM */

/* Shorthands for "families" of compilers/platforms */
#define SLANG_GCC_FAMILY (SLANG_CLANG || SLANG_SNC || SLANG_GHS || SLANG_GCC)
#define SLANG_WINDOWS_FAMILY (SLANG_WINRT || SLANG_WIN32 || SLANG_WIN64)
#define SLANG_MICROSOFT_FAMILY (SLANG_XBOXONE || SLANG_X360 || SLANG_WINDOWS_FAMILY)
#define SLANG_LINUX_FAMILY (SLANG_LINUX || SLANG_ANDROID)
#define SLANG_APPLE_FAMILY (SLANG_IOS || SLANG_OSX)                  /* equivalent to #if __APPLE__ */
#define SLANG_UNIX_FAMILY (SLANG_LINUX_FAMILY || SLANG_APPLE_FAMILY) /* shortcut for unix/posix platforms */

// GCC Specific
#if SLANG_GCC_FAMILY
#	define SLANG_ALIGN_OF(T)	__alignof__(T)

#   define SLANG_BREAKPOINT(id) __builtin_trap()

// Use this macro instead of offsetof, because gcc produces warning if offsetof is used on a 
// non POD type, even though it produces the correct result
#   define SLANG_OFFSET_OF(T, ELEMENT) (size_t(&((T*)1)->ELEMENT) - 1)
#endif // SLANG_GCC_FAMILY

// Microsoft VC specific
#if SLANG_VC
#   define SLANG_ALIGN_OF(T) __alignof(T)

#	define SLANG_BREAKPOINT(id) __debugbreak();

#endif // SLANG_VC

// Default impls

#ifndef SLANG_OFFSET_OF
#   define SLANG_OFFSET_OF(X, Y) offsetof(X, Y)
#endif

#ifndef SLANG_BREAKPOINT
// Make it crash with a write to 0!
#   define SLANG_BREAKPOINT(id) (*((int*)0) = int(id));
#endif

// If slang.h has been included we don't need any of these definitions
#ifndef SLANG_H

/* Macro for declaring if a method is no throw. Should be set before the return parameter. */
#ifndef SLANG_NO_THROW
#   if SLANG_WINDOWS_FAMILY && !defined(SLANG_DISABLE_EXCEPTIONS)
#       define SLANG_NO_THROW __declspec(nothrow)
#   endif
#endif
#ifndef SLANG_NO_THROW
#   define SLANG_NO_THROW
#endif

/* The `SLANG_STDCALL` and `SLANG_MCALL` defines are used to set the calling
convention for interface methods.
*/
#ifndef SLANG_STDCALL
#   if SLANG_MICROSOFT_FAMILY
#       define SLANG_STDCALL __stdcall
#   else
#       define SLANG_STDCALL
#   endif
#endif
#ifndef SLANG_MCALL
#   define SLANG_MCALL SLANG_STDCALL
#endif

#ifndef SLANG_FORCE_INLINE
#    define SLANG_FORCE_INLINE inline
#endif

// TODO(JS): Should these be in slang-cpp-types.h? 
// They are more likely to clash with slang.h

struct SlangUUID
{
    uint32_t data1;
    uint16_t data2;
    uint16_t data3;
    uint8_t  data4[8];
};

typedef int32_t SlangResult;

struct ISlangUnknown
{
    virtual SLANG_NO_THROW SlangResult SLANG_MCALL queryInterface(SlangUUID const& uuid, void** outObject) = 0;
    virtual SLANG_NO_THROW uint32_t SLANG_MCALL addRef() = 0;
    virtual SLANG_NO_THROW uint32_t SLANG_MCALL release() = 0;
};

#define SLANG_COM_INTERFACE(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
    public: \
    SLANG_FORCE_INLINE static const SlangUUID& getTypeGuid() \
    { \
        static const SlangUUID guid = { a, b, c, d0, d1, d2, d3, d4, d5, d6, d7 }; \
        return guid; \
    }
#endif // SLANG_H

// Includes

#include "slang-cpp-scalar-intrinsics.h"
#include "slang-cpp-types.h"

// TODO(JS): Hack! Output C++ code from slang can copy uninitialized variables. 
#if defined(_MSC_VER)
#   pragma warning(disable : 4700)
#endif

#ifndef SLANG_UNROLL
#   define SLANG_UNROLL
#endif

#endif