cmd/compile: bring vendored copy of math/big up-to-date
These files were not added to the repo. They contain conversion
routines and corresponding tests not used by the compiler and
thus are technically not needed.
However, future changes to math/big (and corresponding updates
of this vendored version) may require these files to exist.
Add them to avoid unnecessary confusion.
Change-Id: Ie390fb54f499463b2bba2fdc084967539afbeeb3
Reviewed-on: https://go-review.googlesource.com/19730
Reviewed-by: Alan Donovan <adonovan@google.com>
diff --git a/src/cmd/compile/internal/big/floatmarsh.go b/src/cmd/compile/internal/big/floatmarsh.go
new file mode 100644
index 0000000..44987ee
--- /dev/null
+++ b/src/cmd/compile/internal/big/floatmarsh.go
@@ -0,0 +1,33 @@
+// Copyright 2015 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.
+
+// This file implements encoding/decoding of Floats.
+
+package big
+
+import "fmt"
+
+// MarshalText implements the encoding.TextMarshaler interface.
+// Only the Float value is marshaled (in full precision), other
+// attributes such as precision or accuracy are ignored.
+func (x *Float) MarshalText() (text []byte, err error) {
+ if x == nil {
+ return []byte("<nil>"), nil
+ }
+ var buf []byte
+ return x.Append(buf, 'g', -1), nil
+}
+
+// UnmarshalText implements the encoding.TextUnmarshaler interface.
+// The result is rounded per the precision and rounding mode of z.
+// If z's precision is 0, it is changed to 64 before rounding takes
+// effect.
+func (z *Float) UnmarshalText(text []byte) error {
+ // TODO(gri): get rid of the []byte/string conversion
+ _, _, err := z.Parse(string(text), 0)
+ if err != nil {
+ err = fmt.Errorf("math/big: cannot unmarshal %q into a *big.Float (%v)", text, err)
+ }
+ return err
+}
