34 lines
675 B
Go
34 lines
675 B
Go
package util
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// https://github.com/go-pg/pg/blob/7c2d9d39a5cfc18a422c88a9f5f39d8d2cd10030/internal/underscore.go
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func isUpper(c byte) bool {
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return c >= 'A' && c <= 'Z'
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}
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func isLower(c byte) bool {
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return !isUpper(c)
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}
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func toLower(c byte) byte {
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return c + 32
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}
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// Underscore converts "CamelCasedString" to "camel_cased_string".
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func Underscore(s string) string {
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r := make([]byte, 0, len(s))
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for i := 0; i < len(s); i++ {
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c := s[i]
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if isUpper(c) {
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if i > 0 && i+1 < len(s) && (isLower(s[i-1]) || isLower(s[i+1])) {
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r = append(r, '_', toLower(c))
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} else {
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r = append(r, toLower(c))
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}
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} else {
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r = append(r, c)
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}
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}
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return string(r)
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}
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