Ruby Requires Chilkat v11.0.0+

Convert utf-8 Text File to Windows-1252

Demonstrates how to convert a text file using the utf-8 byte representation to windows-1252. Ruby

require 'chilkat'

success = false

#  Converts a file containing the following to windows-1252:

#  <greetings>
#      <message>Hello, world!</message>
#      <message>¡Hola, mundo!</message>
#      <message>Bonjour, le monde!</message>
#      <message>Hallo, Welt!</message>
#      <message>Olá, mundo!</message>
#      <message>Привет, мир!</message>
#      <message>你好，世界！</message>
#      <message>こんにちは、世界！</message>
#      <message>안녕하세요, 세계!</message>
#      <message>😊🌍</message>
#  </greetings>

#  --------------------------------------------------------------------------------------------------------------------------
#  Note:
#  Windows-1252 is an 8-bit single-byte encoding. It can only encode:
#  
#      The basic ASCII set (0x00–0x7F).
#      Latin-1 Supplement (0xA0–0xFF), plus some extra printable characters (like curly quotes, €, etc.).
#      In total: 256 possible code points, covering most Western European languages but nothing outside of Latin script.

#  --------------------------------------------------------------------------------------------------------------------------
#  Characters in your XML that are representable
#  
#      Hello, world! ✅ (ASCII only)
#      ¡Hola, mundo! ✅ (inverted exclamation mark U+00A1 is in Windows-1252)
#      Bonjour, le monde! ✅
#      Hallo, Welt! ✅
#      Olá, mundo! ✅ (U+00E1 á and U+00F3 ó are in Windows-1252)

#  --------------------------------------------------------------------------------------------------------------------------
#  Characters that break conversion
#  
#      Russian / Cyrillic: Привет, мир!
#      → These are Cyrillic characters (U+041F … U+0440). Not representable in Windows-1252. Conversion would require replacement (e.g. with ? or XML character references).
#      Chinese: 你好，世界！
#      → CJK ideographs (U+4F60, U+597D, etc.). Not in Windows-1252.
#      Japanese: こんにちは、世界！
#      → Hiragana + CJK. Not in Windows-1252.
#      Korean: 안녕하세요, 세계!
#      → Hangul syllables. Not in Windows-1252.
#      Emoji: 😊🌍
#      → Unicode Supplementary Multilingual Plane (U+1F60A, U+1F30D). Windows-1252 cannot encode any emoji.

bd = Chilkat::CkBinData.new()

#  Load the utf-8 bytes.
success = bd.LoadFile("qa_data/xml/utf8test.xml")
if (success == false)
    print bd.lastErrorText() + "\n";
    exit
end

#  If allOrNone = true, then the conversion fails and the contents of the BinData
#  are left unchanged if any char is unconvertable.

#  If allOrNone = false, then non-convertable chars are discarded.
allOrNone = false
fromCharset = "utf-8"
toCharset = "windows-1252"
success = bd.CharsetConvert(fromCharset,toCharset,allOrNone)

#  The return value will be false if any utf-8 chars were discarded because of non-convertability.
if (success == false)
    print "Some utf-8 chars could not be converted to windows-1252" + "\n";
else
    print "All utf-8 chars were converted to windows-1252" + "\n";
end

success = bd.WriteFile("c:/temp/qa_output/out.xml")

#  The output file contains the following, where all non-convertable chars were discarded

#  <greetings>
#      <message>Hello, world!</message>
#      <message>¡Hola, mundo!</message>
#      <message>Bonjour, le monde!</message>
#      <message>Hallo, Welt!</message>
#      <message>Olá, mundo!</message>
#      <message>, !</message>
#      <message></message>
#      <message></message>
#      <message>, !</message>
#      <message></message>
#  </greetings>