mirror of
https://github.com/matrix-construct/construct
synced 2024-10-31 10:58:54 +01:00
352 lines
6.2 KiB
C++
352 lines
6.2 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_JS_VALUE_H
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namespace ircd {
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namespace js {
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// Use Value to carry a non-gc host pointer value
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template<class T> T *pointer_value(const JS::Value &);
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JS::Value pointer_value(const void *const &);
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JS::Value pointer_value(void *const &);
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struct value
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:root<JS::Value>
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{
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IRCD_OVERLOAD(pointer)
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explicit operator std::string() const;
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explicit operator double() const;
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explicit operator uint64_t() const;
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explicit operator int64_t() const;
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explicit operator uint32_t() const;
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explicit operator int32_t() const;
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explicit operator uint16_t() const;
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explicit operator bool() const;
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template<class T> value(const JS::MutableHandle<T> &h);
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template<class T> value(const JS::Handle<T> &h);
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value(pointer_t, void *const &);
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value(const std::string &);
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value(const char *const &);
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value(const nullptr_t &);
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value(const double &);
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value(const float &);
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value(const uint64_t &);
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value(const int32_t &);
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value(const bool &);
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value(const jsid &);
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value(JSObject &);
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value(JSObject *const &);
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value(JSString *const &);
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value(JSFunction *const &);
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value(JS::Symbol *const &);
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value(const JS::Value &);
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value();
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};
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JSType type(const handle<value> &val);
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JSType type(const value &val);
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bool undefined(const handle<value> &val);
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bool undefined(const value &val);
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bool is_array(const handle<value> &val);
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bool is_array(const value &val);
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inline
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value::value()
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:value::root::type{JS::UndefinedValue()}
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{
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}
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inline
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value::value(const JS::Value &val)
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:value::root::type{val}
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{
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}
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inline
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value::value(JS::Symbol *const &val)
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:value::root::type{JS::SymbolValue(val)}
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{
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}
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inline
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value::value(JSObject *const &val)
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:value::root::type
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{
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val? JS::ObjectValue(*val) : throw internal_error("NULL JSObject")
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}
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{
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}
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inline
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value::value(JSObject &val)
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:value::root::type{JS::ObjectValue(val)}
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{
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}
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inline
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value::value(JSString *const &val)
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:value::root::type{JS::StringValue(val)}
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{
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}
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inline
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value::value(JSFunction *const &val)
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:value::root::type{}
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{
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auto *const obj(JS_GetFunctionObject(val));
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if(unlikely(!obj))
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throw type_error("Function cannot convert to Object");
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(*this) = JS::ObjectValue(*obj);
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}
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inline
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value::value(const jsid &val)
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:value::root::type{}
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{
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if(!JS_IdToValue(*cx, val, &(*this)))
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throw type_error("Failed to construct value from Id");
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}
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inline
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value::value(const bool &b)
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:value::root::type{JS::BooleanValue(b)}
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{
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}
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inline
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value::value(const int32_t &val)
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:value::root::type{JS::Int32Value(val)}
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{
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}
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inline
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value::value(const uint64_t &val)
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:value::root::type{JS::DoubleValue(val)}
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{
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}
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inline
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value::value(const float &val)
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:value::root::type{JS::Float32Value(val)}
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{
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}
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inline
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value::value(const double &val)
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:value::root::type{JS::DoubleValue(val)}
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{
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}
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inline
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value::value(const nullptr_t &)
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:value::root::type{JS::NullValue()}
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{
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}
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inline
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value::value(const std::string &s)
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:value::root::type{[&s]
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{
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if(s.empty())
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return JS::StringValue(JS_GetEmptyString(*cx));
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auto buf(native_external_copy(s));
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const auto ret(JS_NewExternalString(*cx, buf.get(), s.size(), &native_external_delete));
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buf.release();
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return JS::StringValue(ret);
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}()}
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{
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}
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inline
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value::value(const char *const &s)
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:value::root::type{[&s]
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{
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if(!s || !*s)
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return JS::StringValue(JS_GetEmptyString(*cx));
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const auto len(strlen(s));
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auto buf(native_external_copy(s, len));
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const auto ret(JS_NewExternalString(*cx, buf.get(), len, &native_external_delete));
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buf.release();
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return JS::StringValue(ret);
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}()}
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{
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}
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inline
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value::value(pointer_t,
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void *const &ptr)
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:value::root::type{pointer_value(ptr)}
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{
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}
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template<class T>
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value::value(const JS::Handle<T> &h)
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:value(h.get())
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{
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}
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template<class T>
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value::value(const JS::MutableHandle<T> &h)
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:value(h.get())
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{
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}
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inline
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value::operator bool()
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const
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{
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return JS::ToBoolean(*this);
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}
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inline
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value::operator uint16_t()
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const
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{
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uint16_t ret;
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if(!JS::ToUint16(*cx, *this, &ret))
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throw type_error("Failed cast to uint16_t");
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return ret;
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}
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inline
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value::operator int32_t()
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const
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{
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int32_t ret;
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if(!JS::ToInt32(*cx, *this, &ret))
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throw type_error("Failed cast to int32_t");
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return ret;
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}
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inline
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value::operator uint32_t()
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const
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{
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uint32_t ret;
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if(!JS::ToUint32(*cx, *this, &ret))
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throw type_error("Failed cast to uint32_t");
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return ret;
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}
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inline
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value::operator int64_t()
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const
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{
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int64_t ret;
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if(!JS::ToInt64(*cx, *this, &ret))
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throw type_error("Failed cast to int64_t");
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return ret;
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}
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inline
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value::operator uint64_t()
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const
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{
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uint64_t ret;
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if(!JS::ToUint64(*cx, *this, &ret))
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throw type_error("Failed cast to uint64_t");
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return ret;
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}
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inline
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value::operator double()
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const
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{
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double ret;
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if(!JS::ToNumber(*cx, *this, &ret))
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throw type_error("Failed cast to double");
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return ret;
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}
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inline
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value::operator std::string()
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const
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{
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const auto s(JS::ToString(*cx, *this));
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return s? native(s) : throw type_error("Failed to cast to string");
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}
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inline bool
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is_array(const value &val)
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{
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return is_array(handle<value>(val));
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}
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inline bool
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is_array(const handle<value> &val)
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{
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bool ret;
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if(!JS_IsArrayObject(*cx, val, &ret))
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throw internal_error("Failed to query if value is array");
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return ret;
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}
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inline bool
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undefined(const value &val)
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{
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return type(val) == JSTYPE_VOID;
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}
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inline bool
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undefined(const handle<value> &val)
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{
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return type(val) == JSTYPE_VOID;
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}
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inline JSType
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type(const value &val)
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{
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return JS_TypeOfValue(*cx, val);
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}
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inline JSType
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type(const handle<value> &val)
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{
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return JS_TypeOfValue(*cx, val);
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}
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inline JS::Value
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pointer_value(const void *const &ptr)
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{
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return pointer_value(const_cast<void *>(ptr));
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}
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inline JS::Value
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pointer_value(void *const &ptr)
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{
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JS::Value ret;
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ret.setPrivate(ptr);
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return ret;
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}
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template<class T>
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T *
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pointer_value(const JS::Value &val)
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{
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const auto ret(val.toPrivate());
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return reinterpret_cast<T *>(ret);
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}
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} // namespace js
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} // namespace ircd
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