27 lines
660 B
Go
27 lines
660 B
Go
package netln
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import (
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"github.com/reiver/go-utf8"
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"fmt"
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"io"
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)
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// writeRune deals with writing a single rune.
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//
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// It also makes sure that any error condition is represented as a Go error.
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//
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// It also wraps any errors, and provides a more appropriate error message.
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func writeRune(writer io.Writer, r rune, expectedWritten int) error {
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n, err := utf8.WriteRune(writer, r)
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if nil != err {
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return fmt.Errorf("problem writing UTF-8 character %U: %w", r, err)
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}
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if expectedWritten != n {
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return fmt.Errorf("problem writing UTF-8 character %U — expected to write %d bytes, but actually wrote %b bytes", r, expectedWritten, n)
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}
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return nil
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}
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