make_c_files.sh

#!/bin/bash 

# Copyright (c) 2021, Laurence Lundblade.
#
# Created by Laurence Lundblade on 6/5/2021.
#
# SPDX-License-Identifier: BSD-3-Clause
#
# See BSD-3-Clause license in README.md


# This takes an indicator to produce either source or header and the
# name of file containing encoded CBOR and outputs a C static variable
# for the contents of the file


# The first argument is the operation type, either "source" or "header"
operation_type=$1

# The second argument is the file with encoded CBOR that is the input
cbor_input_file=$2

header_preamble='
/* This file is automatically generated from CBOR-diag files
 * or hex format files and should not be edited.
 */

#define EAT_TEST_USEFUL_BUF(test_name) ((struct q_useful_buf_c){test_name, sizeof(test_name)})

'

source_preamble='
/* This file is automatically generated from CBOR-diag files
 * or hex format files and should not be edited.
 */
'


if [[ $operation_type != *_preamble ]] ; then
    # Process the path name down to a variable name. If there is a
    # directory name in the path, then that is prepended to the name. If
    # not, then it is not prepended.

    # Prefix all test with this
    prefix="eat_test_"

    f1=$(basename $cbor_input_file)
    file=${f1%.*}

    full_path=$(dirname $cbor_input_file)
    last_path=$(basename $full_path)

    if [[ $last_path == $full_path ]] ; then
        name=${prefix}$file
    else
        name=${prefix}${last_path}_${file}
    fi
fi


case $operation_type in

    source)
        # Being asked to produce the source file, the one with the
        # contents of the CBOR file in a const variable. xxd does all
        # the work. It is necessary to pipe the file into xxd so this
        # can control the variable name.
        echo  "const unsigned char ${name}[] = {" 
        cat $cbor_input_file | xxd -i 
        echo "};"
        echo
        ;;
    
    header)
        # Being asked to produce the header file, the empty definition
        # of the variable. The size is included so the sizeof operator
        # works on it. Must pipe into wc so the file name is not in
        # the wc output
        size=`cat $cbor_input_file | wc -c | tr -d ' '`
        echo "extern const unsigned char ${name}[${size}];"
        echo
        echo
        ;;

    source_preamble)
	echo "$source_preamble"
	;;

    header_preamble)
	echo "$header_preamble"
	;;

    *)
	# a bad operation type was give
	exit -1
	;;
esac