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authorWim <wim@42.be>2022-04-25 23:50:10 +0200
committerGitHub <noreply@github.com>2022-04-25 23:50:10 +0200
commit67adad3e08fe17d5f7e87468ea47aa76e1662255 (patch)
tree91314fac90d39254e66ae794decfcd21c10a7b20 /vendor/github.com/pelletier/go-toml/v2/internal/danger
parent2fca3c756373577eab4e0120ccce62eecc1f5ad8 (diff)
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Update dependencies (#1813)
Diffstat (limited to 'vendor/github.com/pelletier/go-toml/v2/internal/danger')
-rw-r--r--vendor/github.com/pelletier/go-toml/v2/internal/danger/danger.go65
-rw-r--r--vendor/github.com/pelletier/go-toml/v2/internal/danger/typeid.go23
2 files changed, 88 insertions, 0 deletions
diff --git a/vendor/github.com/pelletier/go-toml/v2/internal/danger/danger.go b/vendor/github.com/pelletier/go-toml/v2/internal/danger/danger.go
new file mode 100644
index 00000000..e38e1131
--- /dev/null
+++ b/vendor/github.com/pelletier/go-toml/v2/internal/danger/danger.go
@@ -0,0 +1,65 @@
+package danger
+
+import (
+ "fmt"
+ "reflect"
+ "unsafe"
+)
+
+const maxInt = uintptr(int(^uint(0) >> 1))
+
+func SubsliceOffset(data []byte, subslice []byte) int {
+ datap := (*reflect.SliceHeader)(unsafe.Pointer(&data))
+ hlp := (*reflect.SliceHeader)(unsafe.Pointer(&subslice))
+
+ if hlp.Data < datap.Data {
+ panic(fmt.Errorf("subslice address (%d) is before data address (%d)", hlp.Data, datap.Data))
+ }
+ offset := hlp.Data - datap.Data
+
+ if offset > maxInt {
+ panic(fmt.Errorf("slice offset larger than int (%d)", offset))
+ }
+
+ intoffset := int(offset)
+
+ if intoffset > datap.Len {
+ panic(fmt.Errorf("slice offset (%d) is farther than data length (%d)", intoffset, datap.Len))
+ }
+
+ if intoffset+hlp.Len > datap.Len {
+ panic(fmt.Errorf("slice ends (%d+%d) is farther than data length (%d)", intoffset, hlp.Len, datap.Len))
+ }
+
+ return intoffset
+}
+
+func BytesRange(start []byte, end []byte) []byte {
+ if start == nil || end == nil {
+ panic("cannot call BytesRange with nil")
+ }
+ startp := (*reflect.SliceHeader)(unsafe.Pointer(&start))
+ endp := (*reflect.SliceHeader)(unsafe.Pointer(&end))
+
+ if startp.Data > endp.Data {
+ panic(fmt.Errorf("start pointer address (%d) is after end pointer address (%d)", startp.Data, endp.Data))
+ }
+
+ l := startp.Len
+ endLen := int(endp.Data-startp.Data) + endp.Len
+ if endLen > l {
+ l = endLen
+ }
+
+ if l > startp.Cap {
+ panic(fmt.Errorf("range length is larger than capacity"))
+ }
+
+ return start[:l]
+}
+
+func Stride(ptr unsafe.Pointer, size uintptr, offset int) unsafe.Pointer {
+ // TODO: replace with unsafe.Add when Go 1.17 is released
+ // https://github.com/golang/go/issues/40481
+ return unsafe.Pointer(uintptr(ptr) + uintptr(int(size)*offset))
+}
diff --git a/vendor/github.com/pelletier/go-toml/v2/internal/danger/typeid.go b/vendor/github.com/pelletier/go-toml/v2/internal/danger/typeid.go
new file mode 100644
index 00000000..9d41c28a
--- /dev/null
+++ b/vendor/github.com/pelletier/go-toml/v2/internal/danger/typeid.go
@@ -0,0 +1,23 @@
+package danger
+
+import (
+ "reflect"
+ "unsafe"
+)
+
+// typeID is used as key in encoder and decoder caches to enable using
+// the optimize runtime.mapaccess2_fast64 function instead of the more
+// expensive lookup if we were to use reflect.Type as map key.
+//
+// typeID holds the pointer to the reflect.Type value, which is unique
+// in the program.
+//
+// https://github.com/segmentio/encoding/blob/master/json/codec.go#L59-L61
+type TypeID unsafe.Pointer
+
+func MakeTypeID(t reflect.Type) TypeID {
+ // reflect.Type has the fields:
+ // typ unsafe.Pointer
+ // ptr unsafe.Pointer
+ return TypeID((*[2]unsafe.Pointer)(unsafe.Pointer(&t))[1])
+}