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d4f107b710
* add Makefile / .drone.yml, use go module with vendor * Update .drone.yml Co-Authored-By: lunny <xiaolunwen@gmail.com>
24 lines
623 B
Go
24 lines
623 B
Go
package types
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import (
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"fmt"
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"io"
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"reflect"
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)
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// ScanFully uses fmt.Sscanf with verb to fully scan val into ptr.
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func ScanFully(ptr interface{}, val string, verb byte) error {
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t := reflect.ValueOf(ptr).Elem().Type()
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// attempt to read extra bytes to make sure the value is consumed
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var b []byte
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n, err := fmt.Sscanf(val, "%"+string(verb)+"%s", ptr, &b)
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switch {
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case n < 1 || n == 1 && err != io.EOF:
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return fmt.Errorf("failed to parse %q as %v: %v", val, t, err)
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case n > 1:
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return fmt.Errorf("failed to parse %q as %v: extra characters %q", val, t, string(b))
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}
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// n == 1 && err == io.EOF
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return nil
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}
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