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unique: use stringslite.Clone

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Change-Id: Icb1ba7df1f0414090632e663b6a92b492546070d
GitHub-Last-Rev: 5169d26813
GitHub-Pull-Request: golang/go#67092
Reviewed-on: https://go-review.googlesource.com/c/go/+/581940
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Commit-Queue: Ian Lance Taylor <iant@google.com>
Reviewed-by: Keith Randall <khr@google.com>
This commit is contained in:
qiulaidongfeng 2024-05-04 01:42:30 +00:00 committed by Gopher Robot
parent 20130cc36a
commit 4dccb78582
1 changed files with 2 additions and 13 deletions
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15
src/unique/clone.go
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@ -6,6 +6,7 @@ package unique
import (
"internal/abi"
"internal/stringslite"
"unsafe"
)
@ -20,7 +21,7 @@ import (
func clone[T comparable](value T, seq *cloneSeq) T {
for _, offset := range seq.stringOffsets {
ps := (*string)(unsafe.Pointer(uintptr(unsafe.Pointer(&value)) + offset))
*ps = cloneString(*ps)
*ps = stringslite.Clone(*ps)
}
return value
}
@ -86,15 +87,3 @@ func buildArrayCloneSeq(typ *abi.Type, seq *cloneSeq, baseOffset uintptr) {
offset = (offset + align - 1) &^ (align - 1)
}
}
// cloneString is a copy of strings.Clone, because we can't depend on the strings
// package here. Several packages that might make use of unique, like net, explicitly
// forbid depending on unicode, which strings depends on.
func cloneString(s string) string {
if len(s) == 0 {
return ""
}
b := make([]byte, len(s))
copy(b, s)
return unsafe.String(&b[0], len(b))
}