(Tcl) Convert a Text File from utf-8 to Windows-1252

Convert a text file from one character encoding to another.

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load ./chilkat.dll

# It's really simple:  Just load from one charset, save using another.

set sb [new_CkStringBuilder]

# In this case, my test file has some norwegian chars in the utf-8 encoding
set success [CkStringBuilder_LoadFile $sb "qa_data/txt/norwegian_chars.txt" "utf-8"]

# We could just as well write over the file we just read in.
# (But I don't want to do that for my example..)
set success [CkStringBuilder_WriteFile $sb "qa_output/norwegian_chars.txt" "windows-1252" 0]

# Note:  Windows-1252 is a 1-byte per char encoding, which means it's only capable of representing
# those chars in Western European languages.   See https://en.wikipedia.org/wiki/Windows-1252
# 
# utf-8 is an encoding that can handle chars in any language, including Chinese, Korean, Japanese, Arabic, Hebrew, Greek, etc.
# If a text file contains chars in these other languages, obviously it cannot be converted to windows-1252 because
# there are only 256 chars that can possibly be represented in a 1-byte per char encoding.

delete_CkStringBuilder $sb