mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
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54 lines
1.5 KiB
Go
54 lines
1.5 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// go-ethereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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package common
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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)
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// LoadJSON reads the given file and unmarshals its content.
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func LoadJSON(file string, val interface{}) error {
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content, err := ioutil.ReadFile(file)
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if err != nil {
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return err
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}
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if err := json.Unmarshal(content, val); err != nil {
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if syntaxerr, ok := err.(*json.SyntaxError); ok {
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line := findLine(content, syntaxerr.Offset)
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return fmt.Errorf("JSON syntax error at %v:%v: %v", file, line, err)
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}
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return fmt.Errorf("JSON unmarshal error in %v: %v", file, err)
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}
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return nil
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}
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// findLine returns the line number for the given offset into data.
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func findLine(data []byte, offset int64) (line int) {
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line = 1
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for i, r := range string(data) {
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if int64(i) >= offset {
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return
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}
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if r == '\n' {
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line++
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}
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}
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return
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}
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