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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 13:14:23 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 13:14:23 +0000
commit73df946d56c74384511a194dd01dbe099584fd1a (patch)
treefd0bcea490dd81327ddfbb31e215439672c9a068 /test/bigmap.go
parentInitial commit. (diff)
downloadgolang-1.16-73df946d56c74384511a194dd01dbe099584fd1a.tar.xz
golang-1.16-73df946d56c74384511a194dd01dbe099584fd1a.zip
Adding upstream version 1.16.10.upstream/1.16.10upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'test/bigmap.go')
-rw-r--r--test/bigmap.go139
1 files changed, 139 insertions, 0 deletions
diff --git a/test/bigmap.go b/test/bigmap.go
new file mode 100644
index 0000000..c5e4f91
--- /dev/null
+++ b/test/bigmap.go
@@ -0,0 +1,139 @@
+// run
+
+// Copyright 2009 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.
+
+// Internally a map holds elements in up to 255 bytes of key+value.
+// When key or value or both are too large, it uses pointers to key+value
+// instead. Test all the combinations.
+
+package main
+
+func seq(x, y int) [1000]byte {
+ var r [1000]byte
+ for i := 0; i < len(r); i++ {
+ r[i] = byte(x + i*y)
+ }
+ return r
+}
+
+func cmp(x, y [1000]byte) {
+ for i := 0; i < len(x); i++ {
+ if x[i] != y[i] {
+ panic("BUG mismatch")
+ }
+ }
+}
+
+func main() {
+ m := make(map[int][1000]byte)
+ m[1] = seq(11, 13)
+ m[2] = seq(2, 9)
+ m[3] = seq(3, 17)
+
+ cmp(m[1], seq(11, 13))
+ cmp(m[2], seq(2, 9))
+ cmp(m[3], seq(3, 17))
+
+
+ {
+ type T [1]byte
+ type V [1]byte
+ m := make(map[T]V)
+ m[T{}] = V{1}
+ m[T{1}] = V{2}
+ if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
+ println(x, y)
+ panic("bad map")
+ }
+ }
+ {
+ type T [100]byte
+ type V [1]byte
+ m := make(map[T]V)
+ m[T{}] = V{1}
+ m[T{1}] = V{2}
+ if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
+ println(x, y)
+ panic("bad map")
+ }
+ }
+ {
+ type T [1]byte
+ type V [100]byte
+ m := make(map[T]V)
+ m[T{}] = V{1}
+ m[T{1}] = V{2}
+ if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
+ println(x, y)
+ panic("bad map")
+ }
+ }
+ {
+ type T [1000]byte
+ type V [1]byte
+ m := make(map[T]V)
+ m[T{}] = V{1}
+ m[T{1}] = V{2}
+ if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
+ println(x, y)
+ panic("bad map")
+ }
+ }
+ {
+ type T [1]byte
+ type V [1000]byte
+ m := make(map[T]V)
+ m[T{}] = V{1}
+ m[T{1}] = V{2}
+ if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
+ println(x, y)
+ panic("bad map")
+ }
+ }
+ {
+ type T [1000]byte
+ type V [1000]byte
+ m := make(map[T]V)
+ m[T{}] = V{1}
+ m[T{1}] = V{2}
+ if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
+ println(x, y)
+ panic("bad map")
+ }
+ }
+ {
+ type T [200]byte
+ type V [1]byte
+ m := make(map[T]V)
+ m[T{}] = V{1}
+ m[T{1}] = V{2}
+ if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
+ println(x, y)
+ panic("bad map")
+ }
+ }
+ {
+ type T [1]byte
+ type V [200]byte
+ m := make(map[T]V)
+ m[T{}] = V{1}
+ m[T{1}] = V{2}
+ if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
+ println(x, y)
+ panic("bad map")
+ }
+ }
+ {
+ type T [200]byte
+ type V [200]byte
+ m := make(map[T]V)
+ m[T{}] = V{1}
+ m[T{1}] = V{2}
+ if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
+ println(x, y)
+ panic("bad map")
+ }
+ }
+}