mirror of
https://github.com/go-gitea/gitea
synced 2024-11-16 06:51:29 +01:00
d17efaa114
* Fix bug on migration 111 * Upgrade bleve to 1.0.10 Co-authored-by: zeripath <art27@cantab.net> Co-authored-by: techknowlogick <techknowlogick@gitea.io>
39 lines
1.5 KiB
Go
Vendored
39 lines
1.5 KiB
Go
Vendored
package bbolt
|
|
|
|
import (
|
|
"reflect"
|
|
"unsafe"
|
|
)
|
|
|
|
func unsafeAdd(base unsafe.Pointer, offset uintptr) unsafe.Pointer {
|
|
return unsafe.Pointer(uintptr(base) + offset)
|
|
}
|
|
|
|
func unsafeIndex(base unsafe.Pointer, offset uintptr, elemsz uintptr, n int) unsafe.Pointer {
|
|
return unsafe.Pointer(uintptr(base) + offset + uintptr(n)*elemsz)
|
|
}
|
|
|
|
func unsafeByteSlice(base unsafe.Pointer, offset uintptr, i, j int) []byte {
|
|
// See: https://github.com/golang/go/wiki/cgo#turning-c-arrays-into-go-slices
|
|
//
|
|
// This memory is not allocated from C, but it is unmanaged by Go's
|
|
// garbage collector and should behave similarly, and the compiler
|
|
// should produce similar code. Note that this conversion allows a
|
|
// subslice to begin after the base address, with an optional offset,
|
|
// while the URL above does not cover this case and only slices from
|
|
// index 0. However, the wiki never says that the address must be to
|
|
// the beginning of a C allocation (or even that malloc was used at
|
|
// all), so this is believed to be correct.
|
|
return (*[maxAllocSize]byte)(unsafeAdd(base, offset))[i:j:j]
|
|
}
|
|
|
|
// unsafeSlice modifies the data, len, and cap of a slice variable pointed to by
|
|
// the slice parameter. This helper should be used over other direct
|
|
// manipulation of reflect.SliceHeader to prevent misuse, namely, converting
|
|
// from reflect.SliceHeader to a Go slice type.
|
|
func unsafeSlice(slice, data unsafe.Pointer, len int) {
|
|
s := (*reflect.SliceHeader)(slice)
|
|
s.Data = uintptr(data)
|
|
s.Cap = len
|
|
s.Len = len
|
|
}
|