/* Copyright (C) 2003-2015 LiveCode Ltd.

This file is part of LiveCode.

LiveCode is free software; you can redistribute it and/or modify it under

the terms of the GNU General Public License v3 as published by the Free

Software Foundation.

LiveCode is distributed in the hope that it will be useful, but WITHOUT ANY

WARRANTY; without even the implied warranty of MERCHANTABILITY or

FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License

for more details.

You should have received a copy of the GNU General Public License

along with LiveCode. If not see <http://www.gnu.org/licenses/>. */

#include <foundation.h>

#include <foundation-auto.h>

#include "foundation-private.h"

#include "foundation-hash.h"

#include <limits>

#include <type_traits>

////////////////////////////////////////////////////////////////////////////////

/* Machine Types

*

* These types are what may be considered 'independent of any language'.

*/

/* The fundamental bool type - this is considered to be 1 byte in size. */

MC_DLLEXPORT_DEF MCTypeInfoRef kMCBoolTypeInfo;

/* The fundamental sized integer types */

MC_DLLEXPORT_DEF MCTypeInfoRef kMCUInt8TypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCSInt8TypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCUInt16TypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCSInt16TypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCUInt32TypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCSInt32TypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCUInt64TypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCSInt64TypeInfo;

/* The fundamental binary floating-point types. */

MC_DLLEXPORT_DEF MCTypeInfoRef kMCFloatTypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCDoubleTypeInfo;

/* The size_t and ssize_t types which are architecture / platform dependent. */

MC_DLLEXPORT_DEF MCTypeInfoRef kMCUIntSizeTypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCSIntSizeTypeInfo;

/* The uintptr_t and intptr_t types which are architecture / platform

* dependent. */

MC_DLLEXPORT_DEF MCTypeInfoRef kMCUIntPtrTypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCSIntPtrTypeInfo;

/* The fundamental unmanaged pointer type (equivalent to void * in C). This

* uses the initialize and defined members of a foreign value description to

* provide an element of safety against nullptr vs non-nullptr. */

MC_DLLEXPORT_DEF MCTypeInfoRef kMCPointerTypeInfo;

/* The natural int and float types are 32-bit wide on 32-bit processors and

* 64-bit wide on 64-bit processors. */

MC_DLLEXPORT_DEF MCTypeInfoRef kMCNaturalUIntTypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCNaturalSIntTypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCNaturalFloatTypeInfo;

/* C Types

*

* These types represent the C types which are relative to the compiler,

* platform and architecture the engine is compiled against. We have a distinct

* type for CBool as (in theory) it could be any length, and not just a byte.

*/

MC_DLLEXPORT_DEF MCTypeInfoRef kMCCBoolTypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCCCharTypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCCUCharTypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCCSCharTypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCCUShortTypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCCSShortTypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCCUIntTypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCCSIntTypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCCULongTypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCCSLongTypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCCULongLongTypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCCSLongLongTypeInfo;

// The uinteger_t and integer_t types, which are engine dependent

MC_DLLEXPORT_DEF MCTypeInfoRef kMCUIntTypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCSIntTypeInfo;

////////////////////////////////////////////////////////////////////////////////

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignBoolTypeInfo() { return kMCBoolTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignUInt8TypeInfo() { return kMCUInt8TypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignSInt8TypeInfo() { return kMCSInt8TypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignUInt16TypeInfo() { return kMCUInt16TypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignSInt16TypeInfo() { return kMCSInt16TypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignUInt32TypeInfo() { return kMCUInt32TypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignSInt32TypeInfo() { return kMCSInt32TypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignUInt64TypeInfo() { return kMCUInt64TypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignSInt64TypeInfo() { return kMCSInt64TypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignFloatTypeInfo() { return kMCFloatTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignDoubleTypeInfo() { return kMCDoubleTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignPointerTypeInfo() { return kMCPointerTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignUIntSizeTypeInfo() { return kMCUIntSizeTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignSIntSizeTypeInfo() { return kMCSIntSizeTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignUIntPtrTypeInfo() { return kMCUIntPtrTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignSIntPtrTypeInfo() { return kMCSIntPtrTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignNaturalUIntTypeInfo() { return kMCNaturalUIntTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignNaturalSIntTypeInfo() { return kMCNaturalSIntTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignNaturalFloatTypeInfo() { return kMCNaturalFloatTypeInfo; }

/**/

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignCBoolTypeInfo() { return kMCCBoolTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignCCharTypeInfo() { return kMCCSCharTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignCUCharTypeInfo() { return kMCCUCharTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignCSCharTypeInfo() { return kMCCSCharTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignCUShortTypeInfo() { return kMCCUShortTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignCSShortTypeInfo() { return kMCCSShortTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignCUIntTypeInfo() { return kMCCUIntTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignCSIntTypeInfo() { return kMCCSIntTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignCULongTypeInfo() { return kMCCULongTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignCSLongTypeInfo() { return kMCCSLongTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignCULongLongTypeInfo() { return kMCCULongLongTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignCSLongLongTypeInfo() { return kMCCSLongLongTypeInfo; }

/**/

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignUIntTypeInfo() { return kMCUIntTypeInfo; }

MC_DLLEXPORT_DEF MCTypeInfoRef MCForeignSIntTypeInfo() { return kMCSIntTypeInfo; }

////////////////////////////////////////////////////////////////////////////////

#if defined(__32_BIT__)

typedef uint32_t natural_uint_t;

typedef int32_t natural_sint_t;

typedef float natural_float_t;

#elif defined(__64_BIT__)

typedef uint64_t natural_uint_t;

typedef int64_t natural_sint_t;

typedef double natural_float_t;

#else

#error Bitness of target not defined

#endif

static_assert(sizeof(int) == 4,

"Assumption that int is 4 bytes in size not valid");

static_assert(sizeof(bool) == 1,

"Assumption that bool is 1 byte in size not valid");

static_assert(sizeof(uintptr_t) == sizeof(natural_uint_t),

"Assumption that natural_uint_t is the same width as uintptr_t not valid");

static_assert(sizeof(intptr_t) == sizeof(natural_sint_t),

"Assumption that natural_uint_t is the same width as uintptr_t not valid");

template <typename CType, typename Enable = void>

struct compute_primitive_type

{

static_assert(sizeof(CType) == 0,

"No mapping from CType to primitive type");

};

template <typename CType>

struct compute_primitive_type<

CType,

typename std::enable_if<std::is_integral<CType>::value &&

std::is_signed<CType>::value>::type>

{

static_assert(sizeof(CType) != 1 || sizeof(CType) != 2 ||

sizeof(CType) != 4 || sizeof(CType) != 8,

"Unsupported signed integer size");

static constexpr auto value =

sizeof(CType) == 1 ? kMCForeignPrimitiveTypeSInt8 :

sizeof(CType) == 2 ? kMCForeignPrimitiveTypeSInt16 :

sizeof(CType) == 4 ? kMCForeignPrimitiveTypeSInt32 :

sizeof(CType) == 8 ? kMCForeignPrimitiveTypeSInt64 :

kMCForeignPrimitiveTypeVoid;

};

template <typename CType>

struct compute_primitive_type<

CType,

typename std::enable_if<std::is_integral<CType>::value &&

!std::is_signed<CType>::value>::type>

{

static_assert(sizeof(CType) != 1 || sizeof(CType) != 2 ||

sizeof(CType) != 4 || sizeof(CType) != 8,

"Unsupported unsigned integer size");

static constexpr auto value =

sizeof(CType) == 1 ? kMCForeignPrimitiveTypeUInt8 :

sizeof(CType) == 2 ? kMCForeignPrimitiveTypeUInt16 :

sizeof(CType) == 4 ? kMCForeignPrimitiveTypeUInt32 :

sizeof(CType) == 8 ? kMCForeignPrimitiveTypeUInt64 :

kMCForeignPrimitiveTypeVoid;

};

template <> struct compute_primitive_type<float>

{

static constexpr auto value = kMCForeignPrimitiveTypeFloat32;

};

template <> struct compute_primitive_type<double>

{

static constexpr auto value = kMCForeignPrimitiveTypeFloat64;

};

template<typename CType>

struct numeric_type_desc_t {

using c_type = CType;

static constexpr auto primitive_type = compute_primitive_type<CType>::value;

static constexpr MCTypeInfoRef& base_type_info() { return kMCNullTypeInfo; }

static constexpr auto is_optional = false;

static constexpr auto is_bridgable = true;

using bridge_type = MCNumberRef;

static constexpr MCTypeInfoRef& bridge_type_info() { return kMCNumberTypeInfo; }

};

template<typename CType>

struct integral_type_desc_t: public numeric_type_desc_t<CType> {

static constexpr auto& hash_func = MCHashInt<CType>;

};

/**/

struct bool_type_desc_t {

using c_type = bool;

static constexpr auto primitive_type = kMCForeignPrimitiveTypeBool;

static constexpr MCTypeInfoRef& base_type_info() { return kMCNullTypeInfo; }

static constexpr MCTypeInfoRef& type_info() { return kMCBoolTypeInfo; }

static constexpr auto is_optional = false;

static constexpr auto is_bridgable = true;

using bridge_type = MCBooleanRef;

static constexpr MCTypeInfoRef& bridge_type_info() { return kMCBooleanTypeInfo; }

static constexpr auto& hash_func = MCHashBool;

static constexpr auto is_promotable = true;

static constexpr MCTypeInfoRef& promoted_type_info() { return kMCUInt32TypeInfo; }

};

struct uint8_type_desc_t: public integral_type_desc_t<uint8_t> {

static constexpr MCTypeInfoRef& type_info() { return kMCUInt8TypeInfo; }

static constexpr auto describe_format = "<foreign 8-bit unsigned integer %u>";

static constexpr auto is_promotable = true;

static constexpr MCTypeInfoRef& promoted_type_info() { return kMCUInt32TypeInfo; }

};

struct sint8_type_desc_t: public integral_type_desc_t<int8_t> {

static constexpr MCTypeInfoRef& type_info() { return kMCSInt8TypeInfo; }

static constexpr auto describe_format = "<foreign 8-bit signed integer %d>";

static constexpr auto is_promotable = true;

static constexpr MCTypeInfoRef& promoted_type_info() { return kMCSInt32TypeInfo; }

};

struct uint16_type_desc_t: public integral_type_desc_t<uint16_t> {

static constexpr MCTypeInfoRef& type_info() { return kMCUInt16TypeInfo; }

static constexpr auto describe_format = "<foreign 16-bit unsigned integer %u>";

static constexpr auto is_promotable = true;

static constexpr MCTypeInfoRef& promoted_type_info() { return kMCUInt32TypeInfo; }

};

struct sint16_type_desc_t: public integral_type_desc_t<int16_t> {

static constexpr MCTypeInfoRef& type_info() { return kMCSInt16TypeInfo; }

static constexpr auto describe_format = "<foreign 16-bit signed integer %d>";

static constexpr auto is_promotable = true;

static constexpr MCTypeInfoRef& promoted_type_info() { return kMCSInt32TypeInfo; }

};

struct uint32_type_desc_t: public integral_type_desc_t<uint32_t> {

static constexpr MCTypeInfoRef& type_info() { return kMCUInt32TypeInfo; }

static constexpr auto describe_format = "<foreign 32-bit unsigned integer %u>";

static constexpr auto is_promotable = false;

};

struct sint32_type_desc_t: public integral_type_desc_t<int32_t> {

static constexpr MCTypeInfoRef& type_info() { return kMCSInt32TypeInfo; }

static constexpr auto describe_format = "<foreign 32-bit signed integer %d>";

static constexpr auto is_promotable = false;

};

struct uint64_type_desc_t: public integral_type_desc_t<uint64_t> {

static constexpr MCTypeInfoRef& type_info() { return kMCUInt64TypeInfo; }

static constexpr auto describe_format = "<foreign 64-bit unsigned integer %llu>";

static constexpr auto is_promotable = false;

};

struct sint64_type_desc_t: public integral_type_desc_t<int64_t> {

static constexpr MCTypeInfoRef& type_info() { return kMCSInt64TypeInfo; }

static constexpr auto describe_format = "<foreign 64-bit signed integer %lld>";

static constexpr auto is_promotable = false;

};

struct float_type_desc_t: public numeric_type_desc_t<float> {

using c_type = float;

static constexpr auto primitive_type = kMCForeignPrimitiveTypeFloat32;

static constexpr MCTypeInfoRef& type_info() { return kMCFloatTypeInfo; }

static constexpr auto describe_format = "<foreign float %lg>";

static constexpr auto& hash_func = MCHashDouble;

static constexpr auto is_promotable = true;

static constexpr MCTypeInfoRef& promoted_type_info() { return kMCDoubleTypeInfo; }

};

struct double_type_desc_t: public numeric_type_desc_t<double> {

using c_type = double;

static constexpr auto primitive_type = kMCForeignPrimitiveTypeFloat64;

static constexpr MCTypeInfoRef& type_info() { return kMCDoubleTypeInfo; }

static constexpr auto describe_format = "<foreign double %lg>";

static constexpr auto& hash_func = MCHashDouble;

static constexpr auto is_promotable = false;

};

struct pointer_type_desc_t {

using c_type = void*;

static constexpr auto primitive_type = kMCForeignPrimitiveTypePointer;

static constexpr auto is_optional = true;

static constexpr auto is_bridgable = false;

static constexpr MCTypeInfoRef& type_info() { return kMCPointerTypeInfo; }

static constexpr auto describe_format = "<foreign pointer %p>";

static constexpr MCTypeInfoRef& base_type_info() { return kMCNullTypeInfo; }

static constexpr auto& hash_func = MCHashPointer;

static constexpr auto is_promotable = false;

};

struct uintsize_type_desc_t: public integral_type_desc_t<size_t> {

static constexpr MCTypeInfoRef& type_info() { return kMCUIntSizeTypeInfo; }

static constexpr auto describe_format = "<foreign unsigned size %zu>";

static constexpr auto is_promotable = false;

};

struct sintsize_type_desc_t: public integral_type_desc_t<ssize_t> {

static constexpr MCTypeInfoRef& type_info() { return kMCSIntSizeTypeInfo; }

static constexpr auto describe_format = "<foreign signed size %zd>";

static constexpr auto is_promotable = false;

};

struct uintptr_type_desc_t: public integral_type_desc_t<uintptr_t> {

static constexpr MCTypeInfoRef& type_info() { return kMCUIntPtrTypeInfo; }

static constexpr auto describe_format = "<foreign unsigned intptr %zu>";

static constexpr auto is_promotable = false;

};

struct sintptr_type_desc_t: public integral_type_desc_t<intptr_t> {

static constexpr MCTypeInfoRef& type_info() { return kMCSIntPtrTypeInfo; }

static constexpr auto describe_format = "<foreign signed intptr %zd>";

static constexpr auto is_promotable = false;

};

/**/

struct naturaluint_type_desc_t: public integral_type_desc_t<natural_uint_t> {

static constexpr MCTypeInfoRef& type_info() { return kMCNaturalUIntTypeInfo; }

static constexpr auto describe_format = "<foreign natural unsigned integer %zu>";

static constexpr auto is_promotable = false;

};

struct naturalsint_type_desc_t: public integral_type_desc_t<natural_sint_t> {

static constexpr MCTypeInfoRef& type_info() { return kMCNaturalSIntTypeInfo; }

static constexpr auto describe_format = "<foreign natural signed integer %zd>";

static constexpr auto is_promotable = false;

};

#if defined(__32_BIT__)

struct naturalfloat_type_desc_t: public float_type_desc_t {

static constexpr MCTypeInfoRef& type_info() { return kMCNaturalFloatTypeInfo; }

static constexpr auto describe_format = "<foreign natural float %lg>";

};

#elif defined(__64_BIT__)

struct naturalfloat_type_desc_t: public double_type_desc_t {

static constexpr MCTypeInfoRef& type_info() { return kMCNaturalFloatTypeInfo; }

static constexpr auto describe_format = "<foreign natural float %lg>";

};

#endif

/**/

struct cbool_type_desc_t: public bool_type_desc_t

{

static constexpr MCTypeInfoRef& type_info() { return kMCCBoolTypeInfo; }

};

struct cchar_type_desc_t: public integral_type_desc_t<char> {

static constexpr MCTypeInfoRef& type_info() { return kMCCCharTypeInfo; }

static constexpr auto describe_format = "<foreign c char '%c'>";

static constexpr auto is_promotable = true;

static constexpr MCTypeInfoRef& promoted_type_info() { return kMCSInt32TypeInfo; }

};

struct cuchar_type_desc_t: public integral_type_desc_t<unsigned char> {

static constexpr MCTypeInfoRef& type_info() { return kMCCUCharTypeInfo; }

static constexpr auto describe_format = "<foreign c unsigned char %u>";

static constexpr auto is_promotable = true;

static constexpr MCTypeInfoRef& promoted_type_info() { return kMCUInt32TypeInfo; }

};

struct cschar_type_desc_t: public integral_type_desc_t<signed char> {

static constexpr MCTypeInfoRef& type_info() { return kMCCSCharTypeInfo; }

static constexpr auto describe_format = "<foreign c signed char %d>";

static constexpr auto is_promotable = true;

static constexpr MCTypeInfoRef& promoted_type_info() { return kMCSInt32TypeInfo; }

};

struct cushort_type_desc_t: public integral_type_desc_t<unsigned short> {

static constexpr MCTypeInfoRef& type_info() { return kMCCUShortTypeInfo; }

static constexpr auto describe_format = "<foreign c unsigned short %u>";

static constexpr auto is_promotable = true;

static constexpr MCTypeInfoRef& promoted_type_info() { return kMCUInt32TypeInfo; }

};

struct csshort_type_desc_t: public integral_type_desc_t<signed short> {

static constexpr MCTypeInfoRef& type_info() { return kMCCSShortTypeInfo; }

static constexpr auto describe_format = "<foreign c signed short %d>";

static constexpr auto is_promotable = true;

static constexpr MCTypeInfoRef& promoted_type_info() { return kMCSInt32TypeInfo; }

};

struct cuint_type_desc_t: public integral_type_desc_t<unsigned int> {

static constexpr MCTypeInfoRef& type_info() { return kMCCUIntTypeInfo; }

static constexpr auto describe_format = "<foreign c unsigned int %u>";

static constexpr auto is_promotable = false;

};

struct csint_type_desc_t: public integral_type_desc_t<signed int> {

static constexpr MCTypeInfoRef& type_info() { return kMCCSIntTypeInfo; }

static constexpr auto describe_format = "<foreign c signed int %d>";

static constexpr auto is_promotable = false;

};

struct culong_type_desc_t: public integral_type_desc_t<unsigned long> {

static constexpr MCTypeInfoRef& type_info() { return kMCCULongTypeInfo; }

static constexpr auto describe_format = "<foreign c unsigned long %lu>";

static constexpr auto is_promotable = false;

};

struct cslong_type_desc_t: public integral_type_desc_t<long> {

static constexpr MCTypeInfoRef& type_info() { return kMCCSLongTypeInfo; }

static constexpr auto describe_format = "<foreign c signed long %ld>";

static constexpr auto is_promotable = false;

};

struct culonglong_type_desc_t: public integral_type_desc_t<unsigned long long> {

static constexpr MCTypeInfoRef& type_info() { return kMCCULongLongTypeInfo; }

static constexpr auto describe_format = "<foreign c unsigned long long %llu>";

static constexpr auto is_promotable = false;

};

struct cslonglong_type_desc_t: public integral_type_desc_t<long long> {

static constexpr MCTypeInfoRef& type_info() { return kMCCSLongLongTypeInfo; }

static constexpr auto describe_format = "<foreign c signed long long %lld>";

static constexpr auto is_promotable = false;

};

struct uint_type_desc_t: public integral_type_desc_t<uinteger_t> {

static_assert(UINTEGER_MAX == UINT32_MAX,

"Unsupported size for uinteger_t");

static constexpr auto primitive_type = kMCForeignPrimitiveTypeUInt32;

static constexpr MCTypeInfoRef& type_info() { return kMCUIntTypeInfo; }

static constexpr auto describe_format = "<foreign unsigned integer %u>";

static constexpr auto is_promotable = false;

};

struct sint_type_desc_t: public integral_type_desc_t<integer_t> {

static_assert(INTEGER_MAX == INT32_MAX,

"Unsupported size for integer_t");

static constexpr auto primitive_type = kMCForeignPrimitiveTypeSInt32;

static constexpr MCTypeInfoRef& type_info() { return kMCSIntTypeInfo; }

static constexpr auto describe_format = "<foreign signed integer %d>";

static constexpr auto& hash_func = MCHashInteger;

static constexpr auto is_promotable = false;

};

MC_DLLEXPORT_DEF MCTypeInfoRef kMCForeignImportErrorTypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCForeignExportErrorTypeInfo;

MC_DLLEXPORT_DEF MCTypeInfoRef kMCForeignAggregateExportErrorTypeInfo;

////////////////////////////////////////////////////////////////////////////////

MC_DLLEXPORT_DEF

bool MCForeignValueCreate(MCTypeInfoRef p_typeinfo, void *p_contents, MCForeignValueRef& r_value)

{

MCAssert(MCTypeInfoIsNamed(p_typeinfo));

MCTypeInfoRef t_resolved_typeinfo;

t_resolved_typeinfo = __MCTypeInfoResolve(p_typeinfo);

__MCForeignValue *t_value;

if (!__MCValueCreateExtended(kMCValueTypeCodeForeignValue,

t_resolved_typeinfo -> foreign . descriptor . size,

t_value))

return false;

if (!t_resolved_typeinfo->foreign.descriptor.copy(&t_resolved_typeinfo->foreign.descriptor, p_contents, t_value + 1))

{

MCMemoryDelete(t_value);

return false;

}

t_value -> typeinfo = MCValueRetain(p_typeinfo);

r_value = t_value;

return true;

}

MC_DLLEXPORT_DEF

bool MCForeignValueCreateAndRelease(MCTypeInfoRef p_typeinfo, void *p_contents, MCForeignValueRef& r_value)

{

MCAssert(MCTypeInfoIsNamed(p_typeinfo));

MCTypeInfoRef t_resolved_typeinfo;

t_resolved_typeinfo = __MCTypeInfoResolve(p_typeinfo);

__MCForeignValue *t_value;

if (!__MCValueCreateExtended(kMCValueTypeCodeForeignValue,

t_resolved_typeinfo -> foreign . descriptor . size,

t_value))

return false;

if (!t_resolved_typeinfo->foreign.descriptor.move(&t_resolved_typeinfo->foreign.descriptor, p_contents, t_value + 1))

{

MCMemoryDelete(t_value);

return false;

}

t_value -> typeinfo = MCValueRetain(p_typeinfo);

r_value = t_value;

return true;

}

MC_DLLEXPORT_DEF

bool MCForeignValueExport(MCTypeInfoRef p_typeinfo, MCValueRef p_value, MCForeignValueRef& r_value)

{

MCAssert(MCTypeInfoIsNamed(p_typeinfo));

MCTypeInfoRef t_resolved_typeinfo;

t_resolved_typeinfo = __MCTypeInfoResolve(p_typeinfo);

__MCForeignValue *t_value;

if (!__MCValueCreateExtended(kMCValueTypeCodeForeignValue,

t_resolved_typeinfo -> foreign . descriptor . size,

t_value))

return false;

if (t_resolved_typeinfo->foreign.descriptor.doexport == nil ||

!t_resolved_typeinfo->foreign.descriptor.doexport(&t_resolved_typeinfo->foreign.descriptor, p_value, false, t_value + 1))

{

MCMemoryDelete(t_value);

return false;

}

t_value -> typeinfo = MCValueRetain(p_typeinfo);

r_value = t_value;

return true;

}

MC_DLLEXPORT_DEF

void *MCForeignValueGetContentsPtr(MCValueRef self)

{

return ((__MCForeignValue *)self) + 1;

}

////////////////////////////////////////////////////////////////////////////////

void __MCForeignValueDestroy(__MCForeignValue *self)

{

MCTypeInfoRef t_resolved_typeinfo;

t_resolved_typeinfo = __MCTypeInfoResolve(self -> typeinfo);

t_resolved_typeinfo->foreign.descriptor.finalize(self + 1);

MCValueRelease(self -> typeinfo);

}

hash_t __MCForeignValueHash(__MCForeignValue *self)

{

MCTypeInfoRef t_resolved_typeinfo;

t_resolved_typeinfo = __MCTypeInfoResolve(self -> typeinfo);

hash_t t_hash;

if (!t_resolved_typeinfo->foreign.descriptor.hash(&t_resolved_typeinfo->foreign.descriptor, self + 1, t_hash))

return 0;

return t_hash;

}

bool __MCForeignValueIsEqualTo(__MCForeignValue *self, __MCForeignValue *other_self)

{

MCTypeInfoRef t_resolved_typeinfo;

t_resolved_typeinfo = __MCTypeInfoResolve(self -> typeinfo);

bool t_result;

if (!t_resolved_typeinfo->foreign.descriptor.equal(&t_resolved_typeinfo->foreign.descriptor, self + 1, other_self + 1, t_result))

return false;

return t_result;

}

bool __MCForeignValueCopyDescription(__MCForeignValue *self, MCStringRef& r_description)

{

MCTypeInfoRef t_resolved_typeinfo;

t_resolved_typeinfo = __MCTypeInfoResolve(self->typeinfo);

bool (*t_describe_func)(const MCForeignTypeDescriptor*, void *, MCStringRef &);

t_describe_func = t_resolved_typeinfo->foreign.descriptor.describe;

if (NULL != t_describe_func)

return t_describe_func (&t_resolved_typeinfo->foreign.descriptor,

MCForeignValueGetContentsPtr (self),

r_description);

else

return MCStringFormat(r_description, "<foreign: %p>", self);

}

////////////////////////////////////////////////////////////////////////////////

template <typename OverflowedType>

static bool

__throw_numeric_overflow(MCTypeInfoRef p_error)

{

return MCErrorCreateAndThrow(p_error,

"type", OverflowedType::type_info(),

"reason", MCSTR("numeric overflow"),

nil);

}

/* ----------------------------------------------------------------

* Generic implementations

* ---------------------------------------------------------------- */

namespace /* anonymous */ {

/* We need to be able to partially specialize describe(), doimport()

* and doexport() as they have very type specific requirements.

* Unfortunately, you can't partially specialize a function template.

* The correct thing to do in this case is to have a single function

* template that hands off to a functor template -- because struct

* templates _can_ be partially specialized.

*

* See also "Why not specialize function templates?"

* http://gotw.ca/publications/mill17.htm

*/

template<typename TypeDesc>

struct Describe

{

static bool describe(typename TypeDesc::c_type p_value, MCStringRef& r_description)

{

return MCStringFormat(r_description, TypeDesc::describe_format, p_value);

}

};

template<typename TypeDesc, typename Enable = void>

struct DoExport

{

static_assert(sizeof(typename TypeDesc::c_type) == 0, "Missing export specialization");

static bool doexport(typename TypeDesc::bridge_type p_boxed_value, typename TypeDesc::c_type& r_value)

{

return false;

}

};

template<typename TypeDesc, typename Enable = void>

struct DoImport

{

static_assert(sizeof(typename TypeDesc::c_type) == 0, "Missing import specialization");

static bool doimport(typename TypeDesc::c_type p_value, typename TypeDesc::bridge_type& r_boxed_value)

{

return false;

}

};

template<typename TypeDesc, typename Enable = void>

struct DoPromote

{

static_assert(sizeof(typename TypeDesc::c_type) == 0, "Missing promote specialization");

static bool promote(void *contents)

{

return false;

}

};

template <typename TypeDesc>

bool initialize(void *contents)

{

static_assert(TypeDesc::is_optional, "This type is not optional");

*static_cast<typename TypeDesc::c_type *>(contents) = typename TypeDesc::c_type();

return true;

}

template <typename TypeDesc>

void finalize(void *contents)

{

}

template <typename TypeDesc>

bool defined(void *contents)

{

static_assert(TypeDesc::is_optional, "This type is not optional");

return *static_cast<typename TypeDesc::c_type *>(contents) != typename TypeDesc::c_type();

}

template <typename TypeDesc>

bool equal(const MCForeignTypeDescriptor* desc, void *left, void *right, bool& r_equal)

{

r_equal = *static_cast<typename TypeDesc::c_type *>(left) == *static_cast<typename TypeDesc::c_type *>(right);

return true;

}

template <typename TypeDesc>

bool copy(const MCForeignTypeDescriptor* desc, void *from, void *to)

{

*static_cast<typename TypeDesc::c_type *>(to) = *static_cast<typename TypeDesc::c_type *>(from);

return true;

}

template <typename TypeDesc>

bool move(const MCForeignTypeDescriptor* desc, void *from, void *to)

{

return copy<TypeDesc>(desc, from, to);

}

template <typename TypeDesc>

bool hash(const MCForeignTypeDescriptor* desc, void *value, hash_t& r_hash)

{

r_hash = TypeDesc::hash_func(*static_cast<typename TypeDesc::c_type *>(value));

return true;

}

template <typename TypeDesc>

bool describe(const MCForeignTypeDescriptor* desc, void *contents, MCStringRef& r_string)

{

return Describe<TypeDesc>::describe(*static_cast<typename TypeDesc::c_type *>(contents), r_string);

}

template <typename TypeDesc>

bool doexport(const MCForeignTypeDescriptor* desc, MCValueRef p_value, bool p_release, void *contents)

{

static_assert(TypeDesc::is_bridgable, "This type is not bridgable");

if (!DoExport<TypeDesc>::doexport(static_cast<typename TypeDesc::bridge_type>(p_value),

*static_cast<typename TypeDesc::c_type *>(contents)))

{

return false;

}

if (p_release)

{

MCValueRelease(p_value);

}

return true;

}

template <typename TypeDesc>

bool doimport(const MCForeignTypeDescriptor* desc, void *contents, bool p_release, MCValueRef& r_value)

{

static_assert(TypeDesc::is_bridgable, "This type is not bridgable");

return DoImport<TypeDesc>::doimport(*static_cast<typename TypeDesc::c_type *>(contents),

reinterpret_cast<typename TypeDesc::bridge_type&>(r_value));

}

template <typename TypeDesc>

void promote(void *contents)

{

static_assert(TypeDesc::is_promotable, "This type is not promotable");

return DoPromote<TypeDesc>::promote(contents);

}

/* ---------- bool specializations */

/* We need to specialize describe for bool because it returns fixed

* strings instead of using a format string. */

template <>

struct Describe<bool_type_desc_t>

{

static bool describe(bool p_value, MCStringRef& r_string)

{

return MCStringFormat(r_string, p_value ? "<foreign bool true>" : "<foreign bool false>");

}

};

template <>

struct DoImport<bool_type_desc_t>

{

static bool doimport(bool p_value, MCBooleanRef& r_boxed_value)

{

r_boxed_value = MCValueRetain(p_value ? kMCTrue : kMCFalse);

return true;

}

};

template <>

struct DoExport<bool_type_desc_t>

{

static bool doexport(MCValueRef p_boxed_value, bool& r_value)

{

r_value = (p_boxed_value == kMCTrue);

return true;

}

};

/* We need to specialize describe for cbool because it returns fixed

* strings instead of using a format string. */

template <>

struct Describe<cbool_type_desc_t>

{

static bool describe(bool p_value, MCStringRef& r_string)

{

return MCStringFormat(r_string, p_value ? "<foreign c bool true>" : "<foreign c bool false>");

}

};

template <>

struct DoImport<cbool_type_desc_t>

{

static bool doimport(bool p_value, MCBooleanRef& r_boxed_value)

{

r_boxed_value = MCValueRetain(p_value ? kMCTrue : kMCFalse);

return true;

}

};

template <>

struct DoExport<cbool_type_desc_t>

{

static bool doexport(MCValueRef p_boxed_value, bool& r_value)

{

r_value = (p_boxed_value == kMCTrue);

return true;

}

};

/* ---------- pointer specializations */

/* ---------- floating-point numeric specializations */

template <typename RealType>

struct DoExport<

RealType, typename std::enable_if<std::is_floating_point<typename RealType::c_type>::value>::type>

{

static bool doexport(MCNumberRef p_boxed_value, typename RealType::c_type& r_value)

{

r_value = typename RealType::c_type(MCNumberFetchAsReal(p_boxed_value));

return true;

}

};

template <typename RealType>

struct DoImport<

RealType, typename std::enable_if<std::is_floating_point<typename RealType::c_type>::value>::type>

{

static bool doimport(typename RealType::c_type& p_value, MCNumberRef& r_boxed_value)

{

return MCNumberCreateWithReal(p_value, r_boxed_value);

}

};

template <typename RealType>

struct DoPromote<

RealType, typename std::enable_if<std::is_floating_point<typename RealType::c_type>::value>::type>

{

static void promote(void *contents)

{

*(double *)contents = *(typename RealType::c_type *)contents;

}

};

/* ---------- integer numeric specializations */

template <typename IntType>

struct DoExport<

IntType, typename std::enable_if<std::is_integral<typename IntType::c_type>::value>::type>

{

static bool doexport(MCNumberRef p_boxed_value, typename IntType::c_type& r_value)

{

// Fetch the number as a double

double t_value = MCNumberFetchAsReal(p_boxed_value);

// First check that the value is within the contiguous integer range

// of doubles. If that succeeds, then check it fits within the target

// integer type.

if (t_value < double(DBL_INT_MIN) ||

t_value > double(DBL_INT_MAX) ||

t_value < double(std::numeric_limits<typename IntType::c_type>::min()) ||

t_value > double(std::numeric_limits<typename IntType::c_type>::max()))

{

return __throw_numeric_overflow<IntType>(kMCForeignExportErrorTypeInfo);

}

r_value = typename IntType::c_type(t_value);

return true;

}

};

template <typename IntType>

struct DoImport<

IntType, typename std::enable_if<std::is_integral<typename IntType::c_type>::value &&

std::is_signed<typename IntType::c_type>::value>::type>

{

static bool doimport(typename IntType::c_type p_value, MCNumberRef& r_boxed_value)

{

if (p_value >= INTEGER_MIN && p_value <= INTEGER_MAX)

{

return MCNumberCreateWithInteger(integer_t(p_value), r_boxed_value);

}

else if (p_value >= DBL_INT_MIN &&

p_value <= (DBL_INT_MAX))

{

return MCNumberCreateWithReal(double(p_value), r_boxed_value);

}

else

{

return __throw_numeric_overflow<IntType>(kMCForeignImportErrorTypeInfo);

}

}

};

template <typename UIntType>

struct DoImport<

UIntType, typename std::enable_if<std::is_integral<typename UIntType::c_type>::value &&

std::is_unsigned<typename UIntType::c_type>::value>::type>

{

static bool doimport(typename UIntType::c_type p_value, MCNumberRef& r_boxed_value)

{

if (p_value <= UINTEGER_MAX)

{

return MCNumberCreateWithUnsignedInteger(uinteger_t(p_value), r_boxed_value);

}

else if (p_value <= (1ULL << std::numeric_limits<double>::digits))

{

return MCNumberCreateWithReal(double(p_value), r_boxed_value);

}

else

{

return __throw_numeric_overflow<UIntType>(kMCForeignImportErrorTypeInfo);

}

}

};

template <typename IntType>

struct DoPromote<

IntType, typename std::enable_if<std::is_integral<typename IntType::c_type>::value &&

std::is_signed<typename IntType::c_type>::value>::type>

{

static void promote(void *contents)

{

*(int *)contents = *(typename IntType::c_type *)contents;

}

};

template <typename UIntType>

struct DoPromote<

UIntType, typename std::enable_if<std::is_integral<typename UIntType::c_type>::value &&

std::is_unsigned<typename UIntType::c_type>::value>::type>

{

static void promote(void *contents)

{

*(unsigned int *)contents = *(typename UIntType::c_type *)contents;

}

};

template <typename TypeDesc>

class DescriptorBuilder {

public:

static bool create(const char *p_name)

{

MCTypeInfoRef& destination = TypeDesc::type_info();

MCForeignPrimitiveType primitive =

TypeDesc::primitive_type;

/* TODO[C++17] Some of the fields in here are left empty, and

* are filled in by calling setup_optional() and

* setup_bridge(). We could use constexpr if instead (see

* below). */

MCForeignTypeDescriptor d = {

sizeof(typename TypeDesc::c_type),

TypeDesc::base_type_info(),

nullptr, /* bridgetype */

&primitive, /* layout */

1, /* layout_size */

nullptr, /* initialize */

finalize<TypeDesc>,

nullptr, /* defined */

move<TypeDesc>,

copy<TypeDesc>,

equal<TypeDesc>,

hash<TypeDesc>,

nullptr, /* doimport */

nullptr, /* doexport */

describe<TypeDesc>,

nullptr, /* promotedtype */

nullptr, /* promote */

};

setup_optional<TypeDesc>(d);

setup_bridge<TypeDesc>(d);

setup_promote<TypeDesc>(d);

MCAutoStringRef t_name_string;

if (!MCStringCreateWithCString(p_name, &t_name_string))

return false;

MCNewAutoNameRef t_name_name;

if (!MCNameCreate(*t_name_string, &t_name_name))

return false;