#!/bin/bash
#
# Create a file named identifiers containing identifiers from internal header
# files or all header files, based on --internal flag.
# Outputs the line count of the file to stdout.
#
# Usage: list-identifiers.sh [ -i | --internal ]
#
# Copyright The Mbed TLS Contributors
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

set -eu

if [ -d include/mbedtls ]; then :; else
    echo "$0: must be run from root" >&2
    exit 1
fi

INTERNAL=""

until [ -z "${1-}" ]
do
  case "$1" in
    -i|--internal)
      INTERNAL="1"
      ;;
    *)
      # print error
      echo "Unknown argument: '$1'"
      exit 1
      ;;
  esac
  shift
done

if [ $INTERNAL ]
then
    HEADERS=$( ls library/*.h )
else
    HEADERS=$( ls include/mbedtls/*.h include/psa/*.h library/*.h )
    HEADERS="$HEADERS 3rdparty/everest/include/everest/everest.h 3rdparty/everest/include/everest/x25519.h"
fi

rm -f identifiers

grep '^[^ /#{]' $HEADERS | \
    sed -e 's/^[^:]*://' | \
    egrep -v '^(extern "C"|(typedef )?(struct|union|enum)( {)?$|};?$)' \
    > _decls

if true; then
sed -n -e 's/.* \**\([a-zA-Z_][a-zA-Z0-9_]*\)(.*/\1/p' \
       -e 's/.*(\*\(.*\))(.*/\1/p' _decls
grep -v '(' _decls | sed -e 's/\([a-zA-Z0-9_]*\)[;[].*/\1/' -e 's/.* \**//'
fi > _identifiers

if [ $( wc -l < _identifiers ) -eq $( wc -l < _decls ) ]; then
    rm _decls
    egrep -v '^(u?int(16|32|64)_t)$' _identifiers | sort > identifiers
    rm _identifiers
else
    echo "$0: oops, lost some identifiers" 2>&1
    exit 1
fi

wc -l identifiers