62 lines
1.4 KiB
Go
62 lines
1.4 KiB
Go
package statevariables
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import (
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"errors"
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"strings"
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)
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// parseUPnPBoolean parses a string like "true", "false", "1", "0" into a boolean.
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func parseUPnPBoolean(s string) (bool, error) {
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switch strings.ToLower(strings.TrimSpace(s)) {
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case "1", "true":
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return true, nil
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case "0", "false":
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return false, nil
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default:
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return false, errors.New("invalid string for UPnP boolean")
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}
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}
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// toBool converts various types to boolean following UPnP rules:
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// true: 1, "true"; false: 0, "false"
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func toBool(val interface{}) (bool, error) {
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if val == nil {
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return false, errors.New("cannot convert nil to bool")
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}
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switch v := val.(type) {
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case bool:
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return v, nil
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case string:
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return parseUPnPBoolean(v)
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default:
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// try to convert numerics to float
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f, err := toFloat(v, 64)
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if err != nil {
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return false, err
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}
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if f == 1.0 {
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return true, nil
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}
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if f == 0.0 {
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return false, nil
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}
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return false, errors.New("numeric value cannot be converted to bool unless 0 or 1")
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}
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}
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// cmpBool compares two boolean values 'a' and 'b'. If they are equal it returns 0, if 'a' is false and 'b' is true it returns -1 else it returns 1.
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func cmpBool(a, b bool) int {
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if a == b { // if both booleans are the same, return 0
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return 0
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}
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if !a && b { // if 'a' is false and 'b' is true, return -1
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return -1
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}
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// otherwise, return 1
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return 1 // if 'a' is true or 'a' and 'b' are not the same
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}
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