mirror of
https://github.com/matrix-construct/construct
synced 2024-07-03 09:18:19 +02:00
6b5bab0871
Templates are now in the namespace basic:: i.e `basic::value<>` Typedefs are in ircd::js:: matching the original non-template types. Ex. stack-duration type in template form is: `basic::value<lifetime::stack>` Ex. stack-duration type in typedef form is `value` Ex. heap-duration type in template form is: `basic::value<lifetime::heap>` Ex. heap-duration type in typedef form is: `heap_value`
489 lines
11 KiB
C++
489 lines
11 KiB
C++
/*
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* Copyright (C) 2016 Charybdis Development Team
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* Copyright (C) 2016 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.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#define HAVE_IRCD_JS_STRING_H
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namespace ircd {
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namespace js {
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bool external(const JSString *const &);
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size_t size(const JSString *const &);
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char16_t at(const JSString *const &, const size_t &);
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const size_t CSTR_BUFS = 8;
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const size_t CSTR_BUFSIZE = 1024;
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char *c_str(const JSString *const &);
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namespace basic {
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template<lifetime L>
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struct string
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:root<JSString *, L>
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{
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IRCD_OVERLOAD(literal)
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char *c_str() const; // Copy into rotating buf
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size_t native_size() const;
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size_t size() const;
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bool empty() const;
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char16_t operator[](const size_t &at) const;
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explicit operator std::string() const;
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operator JS::Value() const;
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using root<JSString *, L>::root;
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string(literal_t, const char16_t *const &);
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string(const char16_t *const &, const size_t &len);
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string(const char16_t *const &);
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string(const std::u16string &);
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string(const char *const &, const size_t &len);
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string(const std::string &);
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string(const char *const &);
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string(const value<L> &);
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string(JSString *const &);
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string(JSString &);
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string();
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struct less
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{
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using is_transparent = std::true_type;
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template<class A, class B> bool operator()(const A &, const B &) const;
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};
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};
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template<class T> constexpr bool is_string();
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template<class A, class B> constexpr bool string_argument();
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template<lifetime A, lifetime B> int cmp(const string<A> &a, const string<B> &b);
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template<lifetime L> int cmp(const char *const &a, const string<L> &b);
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template<lifetime L> int cmp(const string<L> &a, const char *const &b);
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template<lifetime L> int cmp(const string<L> &a, const std::string &b);
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template<lifetime L> int cmp(const std::string &a, const string<L> &b);
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template<lifetime L> bool operator==(const string<L> &a, const char *const &b);
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template<lifetime L> bool operator==(const char *const &a, const string<L> &b);
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template<class A,
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class B>
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using string_comparison = typename std::enable_if<string_argument<A, B>(), bool>::type;
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template<class A, class B> string_comparison<A, B> operator==(const A &a, const B &b);
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template<class A, class B> string_comparison<A, B> operator!=(const A &a, const B &b);
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template<class A, class B> string_comparison<A, B> operator>(const A &a, const B &b);
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template<class A, class B> string_comparison<A, B> operator<(const A &a, const B &b);
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template<class A, class B> string_comparison<A, B> operator>=(const A &a, const B &b);
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template<class A, class B> string_comparison<A, B> operator<=(const A &a, const B &b);
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template<class A, class B> string_comparison<A, B> operator==(const A &a, const B &b);
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template<class A, class B> string_comparison<A, B> operator!=(const A &a, const B &b);
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template<lifetime L>
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using string_pair = std::pair<string<L>, string<L>>;
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template<lifetime L> string_pair<L> split(const typename string<L>::handle &s, const char &c);
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template<lifetime L> string_pair<L> split(const typename string<L>::handle &s, const char16_t &c);
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template<lifetime L> string<L> substr(const typename string<L>::handle &s, const size_t &pos, const size_t &len);
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template<lifetime L> string<L> operator+(const typename string<L>::handle &left, const typename string<L>::handle &right);
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template<lifetime L> std::ostream & operator<<(std::ostream &os, const string<L> &s);
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} // namespace basic
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using string = basic::string<lifetime::stack>;
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using heap_string = basic::string<lifetime::heap>;
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//
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// Implementation
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//
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namespace basic {
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template<lifetime L>
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string<L>::string()
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:string<L>::root::type
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{
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JS_GetEmptyString(*rt)
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}
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{
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}
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template<lifetime L>
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string<L>::string(JSString &val)
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:string<L>::root::type{&val}
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{
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}
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template<lifetime L>
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string<L>::string(JSString *const &val)
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:string<L>::root::type
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{
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likely(val)? val : throw internal_error("NULL string")
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}
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{
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}
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template<lifetime L>
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string<L>::string(const value<L> &val)
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:string<L>::root::type
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{
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JS::ToString(*cx, val)?: throw type_error("Failed to convert value to string")
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}
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{
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}
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template<lifetime L>
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string<L>::string(const std::string &s)
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:string(s.data(), s.size())
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{
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}
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template<lifetime L>
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string<L>::string(const char *const &s)
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:string(s, strlen(s))
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{
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}
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template<lifetime L>
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string<L>::string(const char *const &s,
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const size_t &len)
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:string<L>::root::type{[&s, &len]
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{
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auto buf(native_external_copy(s, len));
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return JS_NewExternalString(*cx, buf.release(), len, &native_external_delete);
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}()}
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{
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if(unlikely(!this->get()))
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throw type_error("Failed to construct string from character array");
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}
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template<lifetime L>
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string<L>::string(const std::u16string &s)
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:string(s.data(), s.size())
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{
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}
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template<lifetime L>
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string<L>::string(const char16_t *const &s)
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:string(s, std::char_traits<char16_t>::length(s))
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{
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}
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template<lifetime L>
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string<L>::string(const char16_t *const &s,
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const size_t &len)
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:string<L>::root::type{[&s, &len]
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{
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// JS_NewExternalString does not require a null terminated buffer, but we are going
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// to terminate anyway in case the deleter ever wants to iterate a canonical vector.
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auto buf(std::make_unique<char16_t[]>(len+1));
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memcpy(buf.get(), s, len * 2);
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buf.get()[len] = char16_t(0);
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return JS_NewExternalString(*cx, buf.release(), len, &native_external_delete);
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}()}
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{
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if(unlikely(!this->get()))
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throw type_error("Failed to construct string from character array");
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}
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template<lifetime L>
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string<L>::string(literal_t,
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const char16_t *const &s)
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:string<L>::root::type
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{
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JS_NewExternalString(*cx, s, std::char_traits<char16_t>::length(s), &native_external_static)
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}
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{
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if(unlikely(!this->get()))
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throw type_error("Failed to construct string from wide character literal");
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}
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template<lifetime L>
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char16_t
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string<L>::operator[](const size_t &pos)
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const
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{
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return at(this->get(), pos);
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}
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template<lifetime L>
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string<L>::operator JS::Value()
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const
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{
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return JS::StringValue(this->get());
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}
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template<lifetime L>
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string<L>::operator std::string()
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const
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{
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return native(this->get());
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}
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template<lifetime L>
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char *
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string<L>::c_str()
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const
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{
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return js::c_str(this->get());
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}
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template<lifetime L>
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bool
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string<L>::empty()
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const
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{
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return size() == 0;
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}
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template<lifetime L>
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size_t
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string<L>::size()
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const
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{
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return js::size(this->get());
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}
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template<lifetime L>
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size_t
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string<L>::native_size()
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const
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{
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return js::native_size(this->get());
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}
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template<lifetime L>
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template<class A,
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class B>
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bool
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string<L>::less::operator()(const A &a, const B &b)
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const
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{
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return cmp(a, b) < 0;
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}
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template<lifetime L>
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std::ostream &
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operator<<(std::ostream &os, const string<L> &s)
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{
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os << std::string(s);
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return os;
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}
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template<class A,
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class B>
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string_comparison<A, B>
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operator>(const A &a, const B &b)
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{
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return cmp(a, b) > 0;
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}
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template<class A,
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class B>
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string_comparison<A, B>
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operator<(const A &a, const B &b)
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{
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return cmp(a, b) < 0;
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}
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template<class A,
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class B>
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string_comparison<A, B>
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operator>=(const A &a, const B &b)
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{
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return cmp(a, b) >= 0;
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}
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template<class A,
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class B>
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string_comparison<A, B>
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operator<=(const A &a, const B &b)
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{
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return cmp(a, b) <= 0;
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}
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template<class A,
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class B>
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string_comparison<A, B>
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operator==(const A &a, const B &b)
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{
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return cmp(a, b) == 0;
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}
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template<class A,
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class B>
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string_comparison<A, B>
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operator!=(const A &a, const B &b)
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{
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return !(operator==(a, b));
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}
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template<lifetime L>
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bool
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operator==(const string<L> &a, const char *const &b)
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{
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bool ret;
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if(unlikely(!JS_StringEqualsAscii(*cx, a, b, &ret)))
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throw internal_error("Failed to compare string to native");
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return ret;
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}
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template<lifetime L>
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bool
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operator==(const char *const &a, const string<L> &b)
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{
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bool ret;
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if(unlikely(!JS_StringEqualsAscii(*cx, b, a, &ret)))
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throw internal_error("Failed to compare string to native");
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return ret;
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}
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template<lifetime L>
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int
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cmp(const string<L> &a,
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const std::string &b)
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{
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return cmp(a, b.c_str());
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}
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template<lifetime L>
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int
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cmp(const std::string &a,
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const string<L> &b)
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{
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return cmp(a.c_str(), b);
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}
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template<lifetime L>
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int
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cmp(const string<L> &a,
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const char *const &b)
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{
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return cmp(a, string<L>(b));
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}
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template<lifetime L>
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int
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cmp(const char *const &a,
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const string<L> &b)
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{
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return cmp(string<L>(a), b);
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}
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template<lifetime A,
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lifetime B>
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int
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cmp(const string<A> &a,
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const string<B> &b)
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{
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int32_t ret;
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if(unlikely(!JS_CompareStrings(*cx, a, b, &ret)))
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throw internal_error("Failed to compare strings");
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return ret;
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}
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template<lifetime L>
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std::pair<string<L>, string<L>>
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split(const typename string<L>::handle &s,
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const char &c)
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{
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return {};
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}
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template<lifetime L>
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std::pair<string<L>, string<L>>
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split(const typename string<L>::handle &s,
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const char16_t &c)
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{
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size_t i(0);
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for(; i < size(s) && at(s, i) != c; ++i);
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return
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{
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substr(s, 0, i),
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i < size(s)? substr(s, i + 1, size(s) - i) : string<L>()
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};
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}
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template<lifetime L>
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string<L>
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substr(const typename string<L>::handle &s,
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const size_t &pos,
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const size_t &len)
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{
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const auto _len(len == size_t(-1)? size(s) - pos : len);
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const auto ret(JS_NewDependentString(*cx, s, pos, _len));
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if(!ret)
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throw std::out_of_range("substr(): invalid arguments");
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return ret;
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}
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template<lifetime L>
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string<L>
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operator+(const typename string<L>::handle &left,
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const typename string<L>::handle &right)
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{
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return JS_ConcatStrings(*cx, left, right);
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}
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template<class A,
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class B>
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constexpr bool
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string_argument()
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{
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return is_string<A>() || is_string<B>();
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}
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template<class T>
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constexpr bool
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is_string()
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{
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return std::is_base_of<string<lifetime::stack>, T>() ||
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std::is_base_of<string<lifetime::heap>, T>();
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}
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} // namespace basic
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inline char16_t
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at(const JSString *const &s,
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const size_t &pos)
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{
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char16_t ret;
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if(unlikely(!JS_GetStringCharAt(*cx, const_cast<JSString *>(s), pos, &ret)))
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throw range_error("index %zu is out of range", pos);
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return ret;
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}
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inline size_t
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size(const JSString *const &s)
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{
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return JS_GetStringLength(const_cast<JSString *>(s));
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}
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inline bool
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external(const JSString *const &s)
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{
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return JS_IsExternalString(const_cast<JSString *>(s));
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}
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} // namespace js
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} // namespace ircd
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