#!/bin/tcsh

set myname = iconv16to8

set do_debug = 0
if ( "x$1"  == "x-debug" ) then
    set do_debug = 1
    shift
endif

if ( $#argv !=   2   ) goto showusage
if ( "x$1"  == "x-h" ) goto showusage

# ------------------------------------------------------------
# Check on two files, inputFna and otputFna, where
# inputFna must exist and otputFna must not exist.
# Display all errors before exiting on any error.
# Use retval to set the exit status.

set ENOERR  =  0
set ENOENT  =  2
set EEXIST  = 17
set retval  =  $ENOERR

set inputFna    = "$1"
set otputFna    = "$2"

set errmsg = ""

if ( ! -f "$inputFna" ) then
    set errmsg = "${errmsg}$myname - ERRR - cannot find input file $inputFna\n"
    set retval = $ENOENT
endif

if ( -f "$otputFna" ) then
    set errmsg = "${errmsg}$myname - ERRR - will not overwrite output file $otputFna\n"
    set retval = $EEXIST
endif

if ( $retval ) then
    echo "\n$errmsg\n"
    exit $retval    #   <--------------<<<
endif

iconv -f utf-16 -t utf-8 $inputFna > $otputFna

set iconv_status = $status

exit $iconv_status


# -----------------------------------------------------------------------------

showusage:

cat << GMWB

$myname

from a UTF-16 file, create an ASCII file

intended for use in converting VS2010 dot-rc files to a format which
can be used by grep, since VS2010 seems to not care (but grep does).

note - outputFna must not already exist


usage: $myname  inputFna outputFna


GMWB

exit 1