76 lines
2.8 KiB
Perl
76 lines
2.8 KiB
Perl
#! /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/config.h. The idea is that the config.h contains ALL the
|
|
# compile time configurations available in Mbed TLS (commented or uncommented).
|
|
# This script extracts the configuration macros from the 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
|
|
|
|
use strict;
|
|
|
|
my $config_file = "./include/mbedtls/config.h";
|
|
|
|
my $query_config_format_file = "./scripts/data_files/query_config.fmt";
|
|
my $query_config_file = "./programs/ssl/query_config.c";
|
|
|
|
# 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
|
|
MBEDTLS_PARAM_FAILED
|
|
);
|
|
my $excluded_re = join '|', @excluded;
|
|
|
|
open(CONFIG_FILE, "$config_file") or die "Opening config file '$config_file': $!";
|
|
|
|
# This variable will contain the string to replace in the CHECK_CONFIG of the
|
|
# format file
|
|
my $config_check = "";
|
|
|
|
while (my $line = <CONFIG_FILE>) {
|
|
if ($line =~ /^(\/\/)?\s*#\s*define\s+(MBEDTLS_\w+).*/) {
|
|
my $name = $2;
|
|
|
|
# Skip over the macro that prevents multiple inclusion
|
|
next if "MBEDTLS_CONFIG_H" eq $name;
|
|
|
|
# Skip over the macro if it is in the ecluded list
|
|
next if $name =~ /$excluded_re/;
|
|
|
|
$config_check .= "#if defined($name)\n";
|
|
$config_check .= " if( strcmp( \"$name\", config ) == 0 )\n";
|
|
$config_check .= " {\n";
|
|
$config_check .= " MACRO_EXPANSION_TO_STR( $name );\n";
|
|
$config_check .= " return( 0 );\n";
|
|
$config_check .= " }\n";
|
|
$config_check .= "#endif /* $name */\n";
|
|
$config_check .= "\n";
|
|
}
|
|
}
|
|
|
|
# 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;
|
|
|
|
# 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);
|