127 lines
3.6 KiB
Go
127 lines
3.6 KiB
Go
/*
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* Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package std
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import (
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"unsafe"
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"github.com/goplus/llgo/c"
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"github.com/goplus/llgo/c/bdwgc"
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)
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// -----------------------------------------------------------------------------
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// StringView represents a C++ std::string_view object.
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type StringView = string
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// -----------------------------------------------------------------------------
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// String represents a C++ std::string object.
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type String struct {
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Unused [24]byte
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}
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// llgo:link (*String).InitEmpty C.stdStringInitEmpty
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func (s *String) InitEmpty() {}
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// llgo:link (*String).InitFrom C.stdStringInitFrom
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func (s *String) InitFrom(v *String) {}
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// llgo:link (*String).InitFromCStr C.stdStringInitFromCStr
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func (s *String) InitFromCStr(cstr *c.Char) {}
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// llgo:link (*String).InitFromCStrLen C.stdStringInitFromCStrLen
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func (s *String) InitFromCStrLen(cstr *c.Char, n uintptr) {}
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// llgo:link (*String).Dispose C.stdStringDispose
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func (s *String) Dispose() {}
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// -----------------------------------------------------------------------------
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func allocString() *String {
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ptr := bdwgc.Malloc(unsafe.Sizeof(String{}))
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bdwgc.RegisterFinalizer(ptr, func(obj, data c.Pointer) {
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(*String)(obj).Dispose()
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}, nil, nil, nil)
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return (*String)(ptr)
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}
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// NewString creates a C++ std::string object.
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func NewString(v string) *String {
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ret := allocString()
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ret.InitFromCStrLen(c.GoStringData(v), uintptr(len(v)))
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return ret
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}
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// NewStringEmpty creates an empty std::string object.
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func NewStringEmpty() *String {
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ret := allocString()
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ret.InitEmpty()
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return ret
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}
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// NewStringFrom creates a copy of a C++ std::string object.
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func NewStringFrom(v *String) *String {
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ret := allocString()
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ret.InitFrom(v)
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return ret
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}
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// NewStringFromCStr creates a C++ std::string object.
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func NewStringFromCStr(cstr *c.Char) *String {
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ret := allocString()
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ret.InitFromCStr(cstr)
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return ret
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}
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// NewStringFromCStrLen creates a C++ std::string object.
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func NewStringFromCStrLen(cstr *c.Char, n uintptr) *String {
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ret := allocString()
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ret.InitFromCStrLen(cstr, n)
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return ret
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}
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// -----------------------------------------------------------------------------
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// Str returns a Go string (it doesn't clone data of the C++ std::string object).
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func (s *String) Str() string {
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return unsafe.String((*byte)(unsafe.Pointer(s.Data())), s.Size())
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}
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// llgo:link (*String).CStr C.stdStringCStr
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func (s *String) CStr() *c.Char { return nil }
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// llgo:link (*String).Data C.stdStringData
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func (s *String) Data() *c.Char { return nil }
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// llgo:link (*String).Size C.stdStringSize
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func (s *String) Size() uintptr { return 0 }
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// -----------------------------------------------------------------------------
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// GoString converts a C++ std::string object to a Go string.
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func GoString(v *String) string {
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return c.GoString(v.Data(), v.Size())
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}
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// Str creates a constant C++ std::string object.
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func Str(v string) *String {
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return NewString(v) // TODO(xsw): optimize it
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}
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// -----------------------------------------------------------------------------
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