#ifndef SLANG_LLVM_H
#define SLANG_LLVM_H

// TODO(JS): 
// Disable exception declspecs, as not supported on LLVM without some extra options.
// We could enable with `-fms-extensions`
#define SLANG_DISABLE_EXCEPTIONS 1

#ifndef SLANG_PRELUDE_ASSERT
#   ifdef SLANG_PRELUDE_ENABLE_ASSERT
extern "C" void assertFailure(const char* msg);
#       define SLANG_PRELUDE_EXPECT(VALUE, MSG) if(VALUE) {} else assertFailure("assertion failed: '" MSG "'")
#       define SLANG_PRELUDE_ASSERT(VALUE) SLANG_PRELUDE_EXPECT(VALUE, #VALUE)
#   else // SLANG_PRELUDE_ENABLE_ASSERT
#       define SLANG_PRELUDE_EXPECT(VALUE, MSG)
#       define SLANG_PRELUDE_ASSERT(x) 
#   endif // SLANG_PRELUDE_ENABLE_ASSERT
#endif

/*
Taken from stddef.h 
*/

typedef __PTRDIFF_TYPE__ ptrdiff_t;
typedef __SIZE_TYPE__ size_t;
typedef __SIZE_TYPE__ rsize_t;

//typedef __WCHAR_TYPE__ wchar_t;

#if defined(__need_NULL)
#undef NULL
#ifdef __cplusplus
#  if !defined(__MINGW32__) && !defined(_MSC_VER)
#    define NULL __null
#  else
#    define NULL 0
#  endif
#else
#  define NULL ((void*)0)
#endif
#ifdef __cplusplus
#if defined(_MSC_EXTENSIONS) && defined(_NATIVE_NULLPTR_SUPPORTED)
namespace std { typedef decltype(nullptr) nullptr_t; }
using ::std::nullptr_t;
#endif
#endif
#undef __need_NULL
#endif /* defined(__need_NULL) */


/*
The following are taken verbatim from stdint.h from Clang in LLVM. Only 8/16/32/64 types are needed. 
*/

// LLVM/Clang types such that we can use LLVM/Clang without headers for C++ output from Slang

#ifdef __INT64_TYPE__
# ifndef __int8_t_defined /* glibc sys/types.h also defines int64_t*/
typedef __INT64_TYPE__ int64_t;
# endif /* __int8_t_defined */
typedef __UINT64_TYPE__ uint64_t;
# define __int_least64_t int64_t
# define __uint_least64_t uint64_t
#endif /* __INT64_TYPE__ */

#ifdef __int_least64_t
typedef __int_least64_t int_least64_t;
typedef __uint_least64_t uint_least64_t;
typedef __int_least64_t int_fast64_t;
typedef __uint_least64_t uint_fast64_t;
#endif /* __int_least64_t */

#ifdef __INT32_TYPE__

# ifndef __int8_t_defined /* glibc sys/types.h also defines int32_t*/
typedef __INT32_TYPE__ int32_t;
# endif /* __int8_t_defined */

# ifndef __uint32_t_defined  /* more glibc compatibility */
# define __uint32_t_defined
typedef __UINT32_TYPE__ uint32_t;
# endif /* __uint32_t_defined */

# define __int_least32_t int32_t
# define __uint_least32_t uint32_t
#endif /* __INT32_TYPE__ */

#ifdef __int_least32_t
typedef __int_least32_t int_least32_t;
typedef __uint_least32_t uint_least32_t;
typedef __int_least32_t int_fast32_t;
typedef __uint_least32_t uint_fast32_t;
#endif /* __int_least32_t */

#ifdef __INT16_TYPE__
#ifndef __int8_t_defined /* glibc sys/types.h also defines int16_t*/
typedef __INT16_TYPE__ int16_t;
#endif /* __int8_t_defined */
typedef __UINT16_TYPE__ uint16_t;
# define __int_least16_t int16_t
# define __uint_least16_t uint16_t
#endif /* __INT16_TYPE__ */

#ifdef __int_least16_t
typedef __int_least16_t int_least16_t;
typedef __uint_least16_t uint_least16_t;
typedef __int_least16_t int_fast16_t;
typedef __uint_least16_t uint_fast16_t;
#endif /* __int_least16_t */

#ifdef __INT8_TYPE__
#ifndef __int8_t_defined  /* glibc sys/types.h also defines int8_t*/
typedef __INT8_TYPE__ int8_t;
#endif /* __int8_t_defined */
typedef __UINT8_TYPE__ uint8_t;
# define __int_least8_t int8_t
# define __uint_least8_t uint8_t
#endif /* __INT8_TYPE__ */

#ifdef __int_least8_t
typedef __int_least8_t int_least8_t;
typedef __uint_least8_t uint_least8_t;
typedef __int_least8_t int_fast8_t;
typedef __uint_least8_t uint_fast8_t;
#endif /* __int_least8_t */

/* prevent glibc sys/types.h from defining conflicting types */
#ifndef __int8_t_defined
# define __int8_t_defined
#endif /* __int8_t_defined */

/* C99 7.18.1.4 Integer types capable of holding object pointers.
 */
#define __stdint_join3(a,b,c) a ## b ## c

#ifndef _INTPTR_T
#ifndef __intptr_t_defined
typedef __INTPTR_TYPE__ intptr_t;
#define __intptr_t_defined
#define _INTPTR_T
#endif
#endif

#ifndef _UINTPTR_T
typedef __UINTPTR_TYPE__ uintptr_t;
#define _UINTPTR_T
#endif

/* C99 7.18.1.5 Greatest-width integer types.
 */
typedef __INTMAX_TYPE__  intmax_t;
typedef __UINTMAX_TYPE__ uintmax_t;

/* C99 7.18.4 Macros for minimum-width integer constants.
 *
 * The standard requires that integer constant macros be defined for all the
 * minimum-width types defined above. As 8-, 16-, 32-, and 64-bit minimum-width
 * types are required, the corresponding integer constant macros are defined
 * here. This implementation also defines minimum-width types for every other
 * integer width that the target implements, so corresponding macros are
 * defined below, too.
 *
 * These macros are defined using the same successive-shrinking approach as
 * the type definitions above. It is likewise important that macros are defined
 * in order of decending width.
 *
 * Note that C++ should not check __STDC_CONSTANT_MACROS here, contrary to the
 * claims of the C standard (see C++ 18.3.1p2, [cstdint.syn]).
 */

#define __int_c_join(a, b) a ## b
#define __int_c(v, suffix) __int_c_join(v, suffix)
#define __uint_c(v, suffix) __int_c_join(v##U, suffix)

#ifdef __INT64_TYPE__
# ifdef __INT64_C_SUFFIX__
#  define __int64_c_suffix __INT64_C_SUFFIX__
# else
#  undef __int64_c_suffix
# endif /* __INT64_C_SUFFIX__ */
#endif /* __INT64_TYPE__ */

#ifdef __int_least64_t
# ifdef __int64_c_suffix
#  define INT64_C(v) __int_c(v, __int64_c_suffix)
#  define UINT64_C(v) __uint_c(v, __int64_c_suffix)
# else
#  define INT64_C(v) v
#  define UINT64_C(v) v ## U
# endif /* __int64_c_suffix */
#endif /* __int_least64_t */


#ifdef __INT32_TYPE__
# ifdef __INT32_C_SUFFIX__
#  define __int32_c_suffix __INT32_C_SUFFIX__
#else
#  undef __int32_c_suffix
# endif /* __INT32_C_SUFFIX__ */
#endif /* __INT32_TYPE__ */

#ifdef __int_least32_t
# ifdef __int32_c_suffix
#  define INT32_C(v) __int_c(v, __int32_c_suffix)
#  define UINT32_C(v) __uint_c(v, __int32_c_suffix)
# else
#  define INT32_C(v) v
#  define UINT32_C(v) v ## U
# endif /* __int32_c_suffix */
#endif /* __int_least32_t */

#ifdef __INT16_TYPE__
# ifdef __INT16_C_SUFFIX__
#  define __int16_c_suffix __INT16_C_SUFFIX__
#else
#  undef __int16_c_suffix
# endif /* __INT16_C_SUFFIX__ */
#endif /* __INT16_TYPE__ */

#ifdef __int_least16_t
# ifdef __int16_c_suffix
#  define INT16_C(v) __int_c(v, __int16_c_suffix)
#  define UINT16_C(v) __uint_c(v, __int16_c_suffix)
# else
#  define INT16_C(v) v
#  define UINT16_C(v) v ## U
# endif /* __int16_c_suffix */
#endif /* __int_least16_t */


#ifdef __INT8_TYPE__
# ifdef __INT8_C_SUFFIX__
#  define __int8_c_suffix __INT8_C_SUFFIX__
#else
#  undef  __int8_c_suffix
# endif /* __INT8_C_SUFFIX__ */
#endif /* __INT8_TYPE__ */

#ifdef __int_least8_t
# ifdef __int8_c_suffix
#  define INT8_C(v) __int_c(v, __int8_c_suffix)
#  define UINT8_C(v) __uint_c(v, __int8_c_suffix)
# else
#  define INT8_C(v) v
#  define UINT8_C(v) v ## U
# endif /* __int8_c_suffix */
#endif /* __int_least8_t */

/* C99 7.18.2.1 Limits of exact-width integer types.
 * C99 7.18.2.2 Limits of minimum-width integer types.
 * C99 7.18.2.3 Limits of fastest minimum-width integer types.
 *
 * The presence of limit macros are completely optional in C99.  This
 * implementation defines limits for all of the types (exact- and
 * minimum-width) that it defines above, using the limits of the minimum-width
 * type for any types that do not have exact-width representations.
 *
 * As in the type definitions, this section takes an approach of
 * successive-shrinking to determine which limits to use for the standard (8,
 * 16, 32, 64) bit widths when they don't have exact representations. It is
 * therefore important that the definitions be kept in order of decending
 * widths.
 *
 * Note that C++ should not check __STDC_LIMIT_MACROS here, contrary to the
 * claims of the C standard (see C++ 18.3.1p2, [cstdint.syn]).
 */

#ifdef __INT64_TYPE__
# define INT64_MAX           INT64_C( 9223372036854775807)
# define INT64_MIN         (-INT64_C( 9223372036854775807)-1)
# define UINT64_MAX         UINT64_C(18446744073709551615)
# define __INT_LEAST64_MIN   INT64_MIN
# define __INT_LEAST64_MAX   INT64_MAX
# define __UINT_LEAST64_MAX UINT64_MAX
#endif /* __INT64_TYPE__ */

#ifdef __INT_LEAST64_MIN
# define INT_LEAST64_MIN   __INT_LEAST64_MIN
# define INT_LEAST64_MAX   __INT_LEAST64_MAX
# define UINT_LEAST64_MAX __UINT_LEAST64_MAX
# define INT_FAST64_MIN    __INT_LEAST64_MIN
# define INT_FAST64_MAX    __INT_LEAST64_MAX
# define UINT_FAST64_MAX  __UINT_LEAST64_MAX
#endif /* __INT_LEAST64_MIN */

#ifdef __INT32_TYPE__
# define INT32_MAX           INT32_C(2147483647)
# define INT32_MIN         (-INT32_C(2147483647)-1)
# define UINT32_MAX         UINT32_C(4294967295)
# define __INT_LEAST32_MIN   INT32_MIN
# define __INT_LEAST32_MAX   INT32_MAX
# define __UINT_LEAST32_MAX UINT32_MAX
#endif /* __INT32_TYPE__ */

#ifdef __INT_LEAST32_MIN
# define INT_LEAST32_MIN   __INT_LEAST32_MIN
# define INT_LEAST32_MAX   __INT_LEAST32_MAX
# define UINT_LEAST32_MAX __UINT_LEAST32_MAX
# define INT_FAST32_MIN    __INT_LEAST32_MIN
# define INT_FAST32_MAX    __INT_LEAST32_MAX
# define UINT_FAST32_MAX  __UINT_LEAST32_MAX
#endif /* __INT_LEAST32_MIN */

#ifdef __INT16_TYPE__
#define INT16_MAX            INT16_C(32767)
#define INT16_MIN          (-INT16_C(32767)-1)
#define UINT16_MAX          UINT16_C(65535)
# define __INT_LEAST16_MIN   INT16_MIN
# define __INT_LEAST16_MAX   INT16_MAX
# define __UINT_LEAST16_MAX UINT16_MAX
#endif /* __INT16_TYPE__ */

#ifdef __INT_LEAST16_MIN
# define INT_LEAST16_MIN   __INT_LEAST16_MIN
# define INT_LEAST16_MAX   __INT_LEAST16_MAX
# define UINT_LEAST16_MAX __UINT_LEAST16_MAX
# define INT_FAST16_MIN    __INT_LEAST16_MIN
# define INT_FAST16_MAX    __INT_LEAST16_MAX
# define UINT_FAST16_MAX  __UINT_LEAST16_MAX
#endif /* __INT_LEAST16_MIN */


#ifdef __INT8_TYPE__
# define INT8_MAX            INT8_C(127)
# define INT8_MIN          (-INT8_C(127)-1)
# define UINT8_MAX          UINT8_C(255)
# define __INT_LEAST8_MIN    INT8_MIN
# define __INT_LEAST8_MAX    INT8_MAX
# define __UINT_LEAST8_MAX  UINT8_MAX
#endif /* __INT8_TYPE__ */

#ifdef __INT_LEAST8_MIN
# define INT_LEAST8_MIN   __INT_LEAST8_MIN
# define INT_LEAST8_MAX   __INT_LEAST8_MAX
# define UINT_LEAST8_MAX __UINT_LEAST8_MAX
# define INT_FAST8_MIN    __INT_LEAST8_MIN
# define INT_FAST8_MAX    __INT_LEAST8_MAX
# define UINT_FAST8_MAX  __UINT_LEAST8_MAX
#endif /* __INT_LEAST8_MIN */

/* Some utility macros */
#define  __INTN_MIN(n)  __stdint_join3( INT, n, _MIN)
#define  __INTN_MAX(n)  __stdint_join3( INT, n, _MAX)
#define __UINTN_MAX(n)  __stdint_join3(UINT, n, _MAX)
#define  __INTN_C(n, v) __stdint_join3( INT, n, _C(v))
#define __UINTN_C(n, v) __stdint_join3(UINT, n, _C(v))

/* C99 7.18.2.4 Limits of integer types capable of holding object pointers. */
/* C99 7.18.3 Limits of other integer types. */

#define  INTPTR_MIN  (-__INTPTR_MAX__-1)
#define  INTPTR_MAX    __INTPTR_MAX__
#define UINTPTR_MAX   __UINTPTR_MAX__
#define PTRDIFF_MIN (-__PTRDIFF_MAX__-1)
#define PTRDIFF_MAX   __PTRDIFF_MAX__
#define    SIZE_MAX      __SIZE_MAX__

/* ISO9899:2011 7.20 (C11 Annex K): Define RSIZE_MAX if __STDC_WANT_LIB_EXT1__
 * is enabled. */
#if defined(__STDC_WANT_LIB_EXT1__) && __STDC_WANT_LIB_EXT1__ >= 1
#define   RSIZE_MAX            (SIZE_MAX >> 1)
#endif

/* C99 7.18.2.5 Limits of greatest-width integer types. */
#define  INTMAX_MIN (-__INTMAX_MAX__-1)
#define  INTMAX_MAX   __INTMAX_MAX__
#define UINTMAX_MAX  __UINTMAX_MAX__

/* C99 7.18.3 Limits of other integer types. */
#define SIG_ATOMIC_MIN __INTN_MIN(__SIG_ATOMIC_WIDTH__)
#define SIG_ATOMIC_MAX __INTN_MAX(__SIG_ATOMIC_WIDTH__)
#ifdef __WINT_UNSIGNED__
# define WINT_MIN       __UINTN_C(__WINT_WIDTH__, 0)
# define WINT_MAX       __UINTN_MAX(__WINT_WIDTH__)
#else
# define WINT_MIN       __INTN_MIN(__WINT_WIDTH__)
# define WINT_MAX       __INTN_MAX(__WINT_WIDTH__)
#endif

#ifndef WCHAR_MAX
# define WCHAR_MAX __WCHAR_MAX__
#endif
#ifndef WCHAR_MIN
# if __WCHAR_MAX__ == __INTN_MAX(__WCHAR_WIDTH__)
#  define WCHAR_MIN __INTN_MIN(__WCHAR_WIDTH__)
# else
#  define WCHAR_MIN __UINTN_C(__WCHAR_WIDTH__, 0)
# endif
#endif

/* 7.18.4.2 Macros for greatest-width integer constants. */
#define  INTMAX_C(v) __int_c(v,  __INTMAX_C_SUFFIX__)
#define UINTMAX_C(v) __int_c(v, __UINTMAX_C_SUFFIX__)


#endif // SLANG_LLVM_H