mirror of
https://github.com/Mbed-TLS/mbedtls.git
synced 2024-12-29 09:21:19 +00:00
120 lines
4.4 KiB
Perl
Executable File
120 lines
4.4 KiB
Perl
Executable File
#! /usr/bin/env perl
|
|
|
|
# Generate query_config.c
|
|
#
|
|
# The file query_config.c contains a C function that can be used to check if
|
|
# a configuration macro is defined and to retrieve its expansion in string
|
|
# form (if any). This facilitates querying the compile time configuration of
|
|
# the library, for example, for testing.
|
|
#
|
|
# The query_config.c is generated from the current configuration at
|
|
# include/mbedtls/mbedtls_config.h. The idea is that the mbedtls_config.h contains ALL the
|
|
# compile time configurations available in Mbed TLS (commented or uncommented).
|
|
# This script extracts the configuration macros from the mbedtls_config.h and this
|
|
# information is used to automatically generate the body of the query_config()
|
|
# function by using the template in scripts/data_files/query_config.fmt.
|
|
#
|
|
# Usage: scripts/generate_query_config.pl without arguments, or
|
|
# generate_query_config.pl mbedtls_config_file template_file output_file
|
|
#
|
|
# 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.
|
|
|
|
use strict;
|
|
|
|
my ($mbedtls_config_file, $query_config_format_file, $query_config_file);
|
|
|
|
my $default_mbedtls_config_file = "./include/mbedtls/mbedtls_config.h";
|
|
my $default_query_config_format_file = "./scripts/data_files/query_config.fmt";
|
|
my $default_query_config_file = "./programs/test/query_config.c";
|
|
|
|
if( @ARGV ) {
|
|
die "Invalid number of arguments - usage: $0 [CONFIG_FILE TEMPLATE_FILE OUTPUT_FILE]" if scalar @ARGV != 3;
|
|
($mbedtls_config_file, $query_config_format_file, $query_config_file) = @ARGV;
|
|
|
|
-f $mbedtls_config_file or die "No such file: $mbedtls_config_file";
|
|
-f $query_config_format_file or die "No such file: $query_config_format_file";
|
|
} else {
|
|
$mbedtls_config_file = $default_mbedtls_config_file;
|
|
$query_config_format_file = $default_query_config_format_file;
|
|
$query_config_file = $default_query_config_file;
|
|
|
|
unless( -f $mbedtls_config_file && -f $query_config_format_file ) {
|
|
chdir '..' or die;
|
|
-f $mbedtls_config_file && -f $query_config_format_file
|
|
or die "No arguments supplied, must be run from project root or a first-level subdirectory\n";
|
|
}
|
|
}
|
|
|
|
# Excluded macros from the generated query_config.c. For example, macros that
|
|
# have commas or function-like macros cannot be transformed into strings easily
|
|
# using the preprocessor, so they should be excluded or the preprocessor will
|
|
# throw errors.
|
|
my @excluded = qw(
|
|
MBEDTLS_SSL_CIPHERSUITES
|
|
);
|
|
my $excluded_re = join '|', @excluded;
|
|
|
|
# This variable will contain the string to replace in the CHECK_CONFIG of the
|
|
# format file
|
|
my $config_check = "";
|
|
my $list_config = "";
|
|
|
|
open(CONFIG_FILE, "<", $mbedtls_config_file) or die "Opening config file '$mbedtls_config_file': $!";
|
|
|
|
while (my $line = <CONFIG_FILE>) {
|
|
if ($line =~ /^(\/\/)?\s*#\s*define\s+(MBEDTLS_\w+).*/) {
|
|
my $name = $2;
|
|
|
|
# Skip over the macro if it is in the ecluded list
|
|
next if $name =~ /$excluded_re/;
|
|
|
|
$config_check .= <<EOT;
|
|
#if defined($name)
|
|
if( strcmp( "$name", config ) == 0 )
|
|
{
|
|
MACRO_EXPANSION_TO_STR( $name );
|
|
return( 0 );
|
|
}
|
|
#endif /* $name */
|
|
|
|
EOT
|
|
|
|
$list_config .= <<EOT;
|
|
#if defined($name)
|
|
OUTPUT_MACRO_NAME_VALUE($name);
|
|
#endif /* $name */
|
|
|
|
EOT
|
|
}
|
|
}
|
|
|
|
close(CONFIG_FILE);
|
|
|
|
# Read the full format file into a string
|
|
local $/;
|
|
open(FORMAT_FILE, "<", $query_config_format_file) or die "Opening query config format file '$query_config_format_file': $!";
|
|
my $query_config_format = <FORMAT_FILE>;
|
|
close(FORMAT_FILE);
|
|
|
|
# Replace the body of the query_config() function with the code we just wrote
|
|
$query_config_format =~ s/CHECK_CONFIG/$config_check/g;
|
|
$query_config_format =~ s/LIST_CONFIG/$list_config/g;
|
|
|
|
# Rewrite the query_config.c file
|
|
open(QUERY_CONFIG_FILE, ">", $query_config_file) or die "Opening destination file '$query_config_file': $!";
|
|
print QUERY_CONFIG_FILE $query_config_format;
|
|
close(QUERY_CONFIG_FILE);
|