kerby-common/kerby-xdr/src/main/java/org/apache/kerby/xdr/type/XdrString.java [229:246]:
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    public static String toUpperCase(String string) {
        boolean changed = false;
        char[] chars = string.toCharArray();

        for (int i = 0; i != chars.length; i++) {
            char ch = chars[i];
            if ('a' <= ch && 'z' >= ch) {
                changed = true;
                chars[i] = (char) (ch - 'a' + 'A');
            }
        }

        if (changed) {
            return new String(chars);
        }

        return string;
    }
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kerby-common/kerby-asn1/src/main/java/org/apache/kerby/asn1/type/Asn1String.java [180:197]:
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    public static String toUpperCase(String string) {
        boolean changed = false;
        char[] chars = string.toCharArray();

        for (int i = 0; i != chars.length; i++) {
            char ch = chars[i];
            if ('a' <= ch && 'z' >= ch) {
                changed = true;
                chars[i] = (char) (ch - 'a' + 'A');
            }
        }

        if (changed) {
            return new String(chars);
        }

        return string;
    }
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