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sonic/ast/utils.go
2021-05-28 23:58:58 +08:00

74 lines
1.8 KiB
Go

/*
* Copyright 2021 ByteDance Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ast
import (
`unsafe`
`github.com/bytedance/sonic/internal/native`
`github.com/bytedance/sonic/internal/rt`
)
//go:nosplit
func i64tof(v int64) float64 {
return *(*float64)(unsafe.Pointer(&v))
}
//go:nosplit
func f64toi(v float64) int64 {
return *(*int64)(unsafe.Pointer(&v))
}
//go:nosplit
func mem2ptr(s []byte) unsafe.Pointer {
return (*rt.GoSlice)(unsafe.Pointer(&s)).Ptr
}
//go:nosplit
func str2ptr(s string) unsafe.Pointer {
return (*rt.GoString)(unsafe.Pointer(&s)).Ptr
}
//go:nosplit
func addr2str(p unsafe.Pointer, n int64) (s string) {
(*rt.GoString)(unsafe.Pointer(&s)).Ptr = p
(*rt.GoString)(unsafe.Pointer(&s)).Len = int(n)
return
}
func unquoteBytes(s string, m *[]byte) native.ParsingError {
pos := -1
slv := (*rt.GoSlice)(unsafe.Pointer(m))
str := (*rt.GoString)(unsafe.Pointer(&s))
ret := native.Unquote(str.Ptr, str.Len, slv.Ptr, &pos, 0)
/* check for errors */
if ret < 0 {
return native.ParsingError(-ret)
}
/* update the length */
slv.Len = ret
return 0
}
func UnquoteString(s string) (ret string, err native.ParsingError) {
mm := make([]byte, 0, len(s))
err = unquoteBytes(s, &mm)
ret = rt.Mem2Str(mm)
return
}