#!/bin/sh
#
# Wed May  7 14:36:35 2003  Mike FABIAN  <mfabian@suse.de>

SIGFILE=$1

if [ ! -e $SIGFILE ] ; then
    # there is no such signature file, do nothing
    exit 0
fi

guess_legacy_encoding () {
    # Guess the legacy encoding used by the language/country
    # found in the current LC_CTYPE value.

    # First determine the LC_CTYPE locale category setting
    ctype="en_US"
    ctype=${LC_ALL-${LC_CTYPE-${LANG-${ctype}}}}

    case $ctype in
	  zh_TW*)
             LEGACY_ENCODING=Big5
	     ;;
  	  zh_HK*)
             LEGACY_ENCODING=Big5HKSCS
	     ;;
	  zh*)
             LEGACY_ENCODING=GB2312
	     ;;
	  ja*)
             LEGACY_ENCODING=EUC-JP
	     ;;
	  ko*)
             LEGACY_ENCODING=EUC-KR
	     ;;
	  ru*)
             LEGACY_ENCODING=KOI8-R
	     ;;
	  uk*)
             LEGACY_ENCODING=KOI8-U
	     ;;
	  pl*|hr*|hu*|cs*|sk*|sl*)
             LEGACY_ENCODING=ISO-8859-2
	     ;;
	  eo*|mt*)
             LEGACY_ENCODING=ISO-8859-3
	     ;;
	  el*)
             LEGACY_ENCODING=ISO-8859-7
	     ;;
	  he*)
             LEGACY_ENCODING=ISO-8859-8
	     ;;
	  tr*)
             LEGACY_ENCODING=ISO-8859-9
	     ;;
	  th*)
             LEGACY_ENCODING=TIS-620      # or ISO-8859-11
	     ;;
	  lt*)
             LEGACY_ENCODING=ISO-8859-13
	     ;;
	  cy*)
             LEGACY_ENCODING=ISO-8859-14
	     ;;
	  ro*)
             LEGACY_ENCODING=ISO-8859-14  # or ISO-8859-16
	     ;;
	  am*|vi*)
             LEGACY_ENCODING=UTF-8
	     ;;
          *)
             LEGACY_ENCODING=ISO-8859-1
             ;;
    esac
}

guess_legacy_encoding;

LOCALE_CHARMAP=$(locale charmap)

for encoding in UTF-8 $LOCALE_CHARMAP $LEGACY_ENCODING ISO-8859-1
do
    if iconv --from $encoding --to $LOCALE_CHARMAP < $SIGFILE > /dev/null  2>&1 ; then
       iconv --from $encoding --to $LOCALE_CHARMAP < $SIGFILE
       exit 0
    fi
done

# unknown encoding in signature file, print it to stdout unchanged:
# (should never happen because the conversion from ISO-8859-1 should
# never return a failure).

cat $SIGFILE