1 files changed, 54 insertions, 0 deletions
diff --git a/abi/map_noswiss.go b/abi/map_noswiss.go
new file mode 100644
index 0000000..ff8609e
--- /dev/null
+++ b/abi/map_noswiss.go
@@ -0,0 +1,54 @@
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package abi
+
+import (
+	"unsafe"
+)
+
+// Map constants common to several packages
+// runtime/runtime-gdb.py:MapTypePrinter contains its own copy
+const (
+	// Maximum number of key/elem pairs a bucket can hold.
+	OldMapBucketCountBits = 3 // log2 of number of elements in a bucket.
+	OldMapBucketCount     = 1 << OldMapBucketCountBits
+
+	// Maximum key or elem size to keep inline (instead of mallocing per element).
+	// Must fit in a uint8.
+	// Note: fast map functions cannot handle big elems (bigger than MapMaxElemBytes).
+	OldMapMaxKeyBytes  = 128
+	OldMapMaxElemBytes = 128 // Must fit in a uint8.
+)
+
+type OldMapType struct {
+	Type
+	Key    *Type
+	Elem   *Type
+	Bucket *Type // internal type representing a hash bucket
+	// function for hashing keys (ptr to key, seed) -> hash
+	Hasher     func(unsafe.Pointer, uintptr) uintptr
+	KeySize    uint8  // size of key slot
+	ValueSize  uint8  // size of elem slot
+	BucketSize uint16 // size of bucket
+	Flags      uint32
+}
+
+// Note: flag values must match those used in the TMAP case
+// in ../cmd/compile/internal/reflectdata/reflect.go:writeType.
+func (mt *OldMapType) IndirectKey() bool { // store ptr to key instead of key itself
+	return mt.Flags&1 != 0
+}
+func (mt *OldMapType) IndirectElem() bool { // store ptr to elem instead of elem itself
+	return mt.Flags&2 != 0
+}
+func (mt *OldMapType) ReflexiveKey() bool { // true if k==k for all keys
+	return mt.Flags&4 != 0
+}
+func (mt *OldMapType) NeedKeyUpdate() bool { // true if we need to update key on an overwrite
+	return mt.Flags&8 != 0
+}
+func (mt *OldMapType) HashMightPanic() bool { // true if hash function might panic
+	return mt.Flags&16 != 0
+}