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package jdk.internal.reflect;

It is necessary to use a "bootstrap" UTF-8 encoder for encoding constant pool entries because the character set converters rely on Class.newInstance().
/** It is necessary to use a "bootstrap" UTF-8 encoder for encoding constant pool entries because the character set converters rely on Class.newInstance(). */
class UTF8 { // This encoder is not quite correct. It does not handle surrogate pairs. static byte[] encode(String str) { int len = str.length(); byte[] res = new byte[utf8Length(str)]; int utf8Idx = 0; try { for (int i = 0; i < len; i++) { int c = str.charAt(i) & 0xFFFF; if (c >= 0x0001 && c <= 0x007F) { res[utf8Idx++] = (byte) c; } else if (c == 0x0000 || (c >= 0x0080 && c <= 0x07FF)) { res[utf8Idx++] = (byte) (0xC0 + (c >> 6)); res[utf8Idx++] = (byte) (0x80 + (c & 0x3F)); } else { res[utf8Idx++] = (byte) (0xE0 + (c >> 12)); res[utf8Idx++] = (byte) (0x80 + ((c >> 6) & 0x3F)); res[utf8Idx++] = (byte) (0x80 + (c & 0x3F)); } } } catch (ArrayIndexOutOfBoundsException e) { throw new InternalError ("Bug in sun.reflect bootstrap UTF-8 encoder", e); } return res; } private static int utf8Length(String str) { int len = str.length(); int utf8Len = 0; for (int i = 0; i < len; i++) { int c = str.charAt(i) & 0xFFFF; if (c >= 0x0001 && c <= 0x007F) { utf8Len += 1; } else if (c == 0x0000 || (c >= 0x0080 && c <= 0x07FF)) { utf8Len += 2; } else { utf8Len += 3; } } return utf8Len; } }