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# Check if $string matches the regular expression $regex
# matchRegEx(string, regex)
# Returns 1 on success, 0 otherwise.
matchRegEx()
{
  string=$1
  regex=$2

  # Awk grep and sed ranges can't be trusted to gives the same result
  # on all platforms and locale. :( (Even for digit ranges...
  # fractions can be included in the 0-1 range.)
  # Using C locale should be enough to fix this.
  #echo $string | c ... 
  echo $string | c $AWK -F=!=!=!=!=!=!=!=!= '
    '$regex' {print 1; exit;}
    {print 0;}'

}

c(){
  LC_ALL=C "$@"
}

$ locale
LANG=en_US.UTF-8
LANGUAGE=en_US
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC=de_DE.UTF-8
LC_TIME=de_DE.UTF-8
LC_COLLATE="en_US.UTF-8"
LC_MONETARY=de_DE.UTF-8
LC_MESSAGES="en_US.UTF-8"
LC_PAPER=de_DE.UTF-8
LC_NAME=de_DE.UTF-8
LC_ADDRESS=de_DE.UTF-8
LC_TELEPHONE=de_DE.UTF-8
LC_MEASUREMENT=de_DE.UTF-8
LC_IDENTIFICATION=de_DE.UTF-8
LC_ALL=
$ LC_ALL=C locale
LANG=en_US.UTF-8
LANGUAGE=en_US
LC_CTYPE="C"
LC_NUMERIC="C"
LC_TIME="C"
LC_COLLATE="C"
LC_MONETARY="C"
LC_MESSAGES="C"
LC_PAPER="C"
LC_NAME="C"
LC_ADDRESS="C"
LC_TELEPHONE="C"
LC_MEASUREMENT="C"
LC_IDENTIFICATION="C"
LC_ALL=C

$ c(){
  LC_ALL=C "$@"
}
$ c locale
LANG=en_US.UTF-8
LANGUAGE=en_US
LC_CTYPE="C"
LC_NUMERIC="C"
LC_TIME="C"
LC_COLLATE="C"
LC_MONETARY="C"
LC_MESSAGES="C"
LC_PAPER="C"
LC_NAME="C"
LC_ADDRESS="C"
LC_TELEPHONE="C"
LC_MEASUREMENT="C"
LC_IDENTIFICATION="C"
LC_ALL=C