53 lines
891 B
Go
53 lines
891 B
Go
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package data
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import (
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"bytes"
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"errors"
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)
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// Comments are `//`, start of line only, for accounting
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var (
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comment = []byte("//")
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)
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type Accounting map[string]string
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func LoadAccounting(filename string) (Accounting, error) {
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scanLines, err := fileToScanner(filename)
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if err != nil {
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return nil, err
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}
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out := make(Accounting)
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for scanLines.Scan() {
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if err := parse(out, scanLines.Bytes()); err != nil {
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return nil, err
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}
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}
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if err := scanLines.Err(); err != nil {
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return nil, err
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}
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return out, nil
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}
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func parse(into Accounting, line []byte) error {
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if len(line) == 0 || bytes.Equal(line[0:2], comment) {
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return nil
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}
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idx := bytes.Index(line, []byte("="))
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key := string(line[0:idx])
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value := string(bytes.Trim(line[idx+1:len(line)], "\t\r\n"))
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if _, ok := into[key]; ok {
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return errors.New("Duplicate key: " + key)
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}
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into[key] = value
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return nil
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}
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