34 lines
1.1 KiB
Scala
34 lines
1.1 KiB
Scala
package example
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object UTF8EncodeAndDecode extends TheMeat with App {
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val codePoints = Seq(0x0041, 0x00F6, 0x0416, 0x20AC, 0x1D11E)
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println("Char Name Unicode UTF-8 Decoded")
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codePoints.foreach { codepoint => print(composeString(codepoint)) }
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println(s"\nSuccessfully completed without errors. [total ${scala.compat.Platform.currentTime - executionStart} ms]")
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}
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trait TheMeat {
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import java.nio.charset.StandardCharsets
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def composeString(codePoint: Int): String = {
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val w = if (Character.isBmpCodePoint(codePoint)) 4 else 5 // Compute spacing
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val bytes = utf8Encode(codePoint)
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def leftAlignedHex: String = f"U+${codePoint}%04X"
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def utf: String = bytes.foldLeft("")(_ + "%02X ".format(_))
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s"%-${w}c %-36s %-7s %-${16 - w}s%c%n"
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.format(codePoint, Character.getName(codePoint), leftAlignedHex, utf, utf8Decode(bytes))
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}
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def utf8Encode(codepoint: Int): Array[Byte] =
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new String(Array[Int](codepoint), 0, 1).getBytes(StandardCharsets.UTF_8)
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def utf8Decode(bytes: Array[Byte]): Int =
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new String(bytes, StandardCharsets.UTF_8).codePointAt(0)
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}
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