#!/bin/bash

# SPDX-License-Identifier: BSD-3-Clause

# Copyright(c) 2018 Intel Corporation. All rights reserved.

# Simple script for printing preprocessor output in human-readable fashion

# Mostly useful for debugging macro metaprogramming

# For more detailed useage, use --h option.

enstyle(){

awk \

-v style="${1}" \

-v regex="${2}" \

'{\

gsub(\

regex,\

"\033["style"m&\033[0m"\

);\

print;\

}'

}

styleUserRegexp()

{

if [[ "${USER_REGEXP}" != "" ]] ; then

enstyle "7;33" "${USER_REGEXP}"

else

tee # pipe that does nothing, just pass input to output

fi

}

styleAll(){

if [[ "${COLORISE}" == "1" ]] ; then

enstyle "33" '[{}()\\[\\],;]'\

| enstyle "1;31" '->|\\.|&'\

| enstyle "1;35" '\\s(if|while|do|for|return|exit|panic)'\

| enstyle "1;36" '(u?int(32|64)_t|void|struct|const|char|volatile|static|unsigned|long)\\s*\\**'\

| enstyle "32" '0x[A-Za-z0-9]+'\

| styleUserRegexp

else

tee # pipe that does nothing, just pass input to output

fi

}

pretty_macro(){

params="${1}"

infile="${2}"

gcc_params="${params} -E -dD ${infile}"

if [[ "${SHOW_ERR}" == "0" ]] ; then

gcc_params+=" 2>/dev/null"

fi

cmd="gcc ${gcc_params}"

if [[ "${VERBOSE}" == "1" ]] ; then

echo "params are: [${params}]"

echo "infile is: [${infile}]"

echo "cmd is: [${cmd}]"

fi

bash -c "$cmd" \

| sed\

-e 's/;\ /;\n\t/g'\

-e 's/{\ /\n{\n\t/g'\

-e 's/}[\ ]*/\n}\n/g'\

| styleAll

}

VERBOSE=0

SHOW_ERR=0

COLORISE=0

gcc_params=""

USER_REGEXP=""

while getopts ":f:I:u:hevc" opt; do

case ${opt} in

h) #usage

echo \

"usage: $0 [-hevc] (-f IN_FILE) [-I INCLUDE_DIR] [-u USER_REGEXP]

Expands c macroes in files given with -f flag and prints them prettily.

mandatory arguments:

-f IN_FILE input file to gcc

optional arguments:

-h show this help message and exit

-e don't redirect gcc errors to /dev/null

-v show verbose output

-c color the output

-u USER_REGEXP highlights user defined regular expression

-I INCLUDE_DIR pass INCLUDE_DIR to gcc with -I option

"

exit 0

;;

u)

USER_REGEXP="${OPTARG}"

;;

e)

SHOW_ERR=1

;;

v)

VERBOSE=1

;;

c)

COLORISE=1

;;

I)

gcc_params+=" -I ${OPTARG}"

;;

f)

infiles+=("${OPTARG}")

;;

\?)

echo "Invalid option: -${OPTARG}" >&2

exit 1

;;

:)

echo "Option -${OPTARG} requires an argument." >&2

exit 1

;;

esac

done

if [[ "${VERBOSE}" == "1" ]] ; then

echo "gcc_params are: [${gcc_params}]"

echo "infiles are: [${infiles[@]}]"

echo "user regexp is: [${USER_REGEXP}]"

fi

for file in ${infiles[@]} ; do

pretty_macro "${gcc_params}" "${file}"

done

exit 0