37 lines
855 B
Go
37 lines
855 B
Go
package txt
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import (
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"strings"
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)
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// Empty checks whether a string represents an empty, unset, or undefined value.
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func Empty(s string) bool {
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if s == "" {
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return true
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} else if s = strings.Trim(s, "%* "); s == "" || s == "0" || s == "-1" || EmptyTime(s) {
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return true
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} else if s = strings.ToLower(s); s == "nil" || s == "null" || s == "nan" {
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return true
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}
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return false
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}
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// NotEmpty tests if a string does not represent an empty/invalid value.
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func NotEmpty(s string) bool {
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return !Empty(s)
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}
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// EmptyTime tests if the string is empty or matches an unknown time pattern.
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func EmptyTime(s string) bool {
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switch s {
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case "":
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return true
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case "0000:00:00 00:00:00", "0000-00-00 00-00-00", "0000-00-00 00:00:00":
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return true
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case "0001-01-01 00:00:00", "0001-01-01 00:00:00 +0000 UTC":
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return true
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default:
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return false
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}
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}
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