#!/bin/sh
echo "add _cplusplus tools"

_cpp_head="\n#ifdef __cplusplus\nextern \"C\" {\n#endif"
_cpp_tail="\n#ifdef __cplusplus\n}\n#endif\n"

FILES=`find ./ -name "*.h" | grep -v "dtest" | grep -v "rom" | \
    grep -v "inc/hw/reg/" | grep -v "mfgtool" | grep -v "dbglogparser_tool" | \
    grep -v "import" | grep -v "deprecated_definitions.h" | 
    grep -v "iot_config.h" | grep -v "encoding.h"`
for file in ${FILES}
do
    file_name=${file##*/}

    # if define _cplusplus
    is_cpp=`grep "_cplusplus" $file -r`
    if [ "$is_cpp" != "" ]; then
        echo "[INFO]"$file" is defined by _cplusplus"
        continue
    fi

    # get cpp header insert line number
    head_line=`grep -n "#include" ./$file | tail -1 | cut -d ":" -f 1`
    if [ "$head_line" == "" ]; then
        head_line=`grep -n "#ifndef\ .*_H" ./$file | tail -1 | cut -d ":" -f 1`
        if [ "$head_line" == "" ]; then
            echo "[ERROR]"$file" is unexpected head format"
            continue
        fi
        head_line=`expr $((head_line)) + 1`
    fi
    # insert _cplusplus head
    sed -i "${head_line}a\\$_cpp_head" ./$file

    # get cpp tail insert line number
    tail_line=`grep -n "#endif" ./$file | tail -1 | cut -d ":" -f 1`
    tail_line=`expr $((tail_line)) - 1`
    if [ "$tail_line" == "" ]; then
        echo "[ERROR]"$file" is unexpected tail format"
    fi
    echo "file: "$file",head: "$head_line", tail: "$tail_line
    # insert _cplusplus tail
    sed -i "${tail_line}a\\$_cpp_tail" ./$file
    #echo $file
done