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57 lines
1.7 KiB
57 lines
1.7 KiB
// Copyright 2016 Google Inc. All Rights Reserved. |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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package gensupport |
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import ( |
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"encoding/json" |
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"errors" |
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"fmt" |
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"math" |
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) |
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// JSONFloat64 is a float64 that supports proper unmarshaling of special float |
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// values in JSON, according to |
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// https://developers.google.com/protocol-buffers/docs/proto3#json. Although |
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// that is a proto-to-JSON spec, it applies to all Google APIs. |
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// |
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// The jsonpb package |
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// (https://github.com/golang/protobuf/blob/master/jsonpb/jsonpb.go) has |
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// similar functionality, but only for direct translation from proto messages |
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// to JSON. |
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type JSONFloat64 float64 |
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func (f *JSONFloat64) UnmarshalJSON(data []byte) error { |
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var ff float64 |
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if err := json.Unmarshal(data, &ff); err == nil { |
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*f = JSONFloat64(ff) |
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return nil |
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} |
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var s string |
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if err := json.Unmarshal(data, &s); err == nil { |
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switch s { |
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case "NaN": |
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ff = math.NaN() |
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case "Infinity": |
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ff = math.Inf(1) |
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case "-Infinity": |
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ff = math.Inf(-1) |
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default: |
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return fmt.Errorf("google.golang.org/api/internal: bad float string %q", s) |
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} |
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*f = JSONFloat64(ff) |
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return nil |
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} |
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return errors.New("google.golang.org/api/internal: data not float or string") |
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}
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