scripts/generate_errors.pl - third_party/github/ARMmbed/mbedtls - Git at Google

 #!/usr/bin/env perl

 # Generate error.c
 #
 # Usage: ./generate_errors.pl or scripts/generate_errors.pl without arguments,
 # or generate_errors.pl include_dir data_dir error_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;
 use warnings;

 my ($include_dir, $data_dir, $error_file);

 if( @ARGV ) {
     die "Invalid number of arguments" if scalar @ARGV != 3;
     ($include_dir, $data_dir, $error_file) = @ARGV;

     -d $include_dir or die "No such directory: $include_dir\n";
     -d $data_dir or die "No such directory: $data_dir\n";
 } else {
     $include_dir = 'include/mbedtls';
     $data_dir = 'scripts/data_files';
     $error_file = 'library/error.c';

     unless( -d $include_dir && -d $data_dir ) {
         chdir '..' or die;
         -d $include_dir && -d $data_dir
             or die "Without arguments, must be run from root or scripts\n"
     }
 }

 my $error_format_file = $data_dir.'/error.fmt';

 my @low_level_modules = qw( AES ARIA ASN1 BASE64 BIGNUM
                             CAMELLIA CCM CHACHA20 CHACHAPOLY CMAC CTR_DRBG DES
                             ENTROPY ERROR GCM HKDF HMAC_DRBG MD5
                             NET OID PADLOCK PBKDF2 PLATFORM POLY1305 RIPEMD160
                             SHA1 SHA256 SHA512 THREADING );
 my @high_level_modules = qw( CIPHER DHM ECP MD
                              PEM PK PKCS12 PKCS5
                              RSA SSL X509 );

 undef $/;

 open(FORMAT_FILE, '<:crlf', "$error_format_file") or die "Opening error format file '$error_format_file': $!";
 my $error_format = <FORMAT_FILE>;
 close(FORMAT_FILE);

 my @files = <$include_dir/*.h>;
 my @necessary_include_files;
 my @matches;
 foreach my $file (@files) {
     open(FILE, '<:crlf', "$file");
     my $content = <FILE>;
     close FILE;
     my $found = 0;
     while ($content =~ m[
             # Both the before-comment and the after-comment are optional.
             # Only the comment content is a regex capture group. The comment
             # start and end parts are outside the capture group.
             (?:/\*[*!](?!<)             # Doxygen before-comment start
                 ((?:[^*]|\*+[^*/])*)    # $1: Comment content (no */ inside)
                 \*/)?                   # Comment end
             \s*\#\s*define\s+(MBEDTLS_ERR_\w+)  # $2: name
             \s+\-(0[Xx][0-9A-Fa-f]+)\s*         # $3: value (without the sign)
             (?:/\*[*!]<                 # Doxygen after-comment start
                 ((?:[^*]|\*+[^*/])*)    # $4: Comment content (no */ inside)
                 \*/)?                   # Comment end
     ]gsx) {
         my ($before, $name, $value, $after) = ($1, $2, $3, $4);
         # Discard Doxygen comments that are coincidentally present before
         # an error definition but not attached to it. This is ad hoc, based
         # on what actually matters (or mattered at some point).
         undef $before if defined($before) && $before =~ /\s*\\name\s/s;
         die "Description neither before nor after $name in $file\n"
           if !defined($before) && !defined($after);
         die "Description both before and after $name in $file\n"
           if defined($before) && defined($after);
         my $description = (defined($before) ? $before : $after);
         $description =~ s/^\s+//;
         $description =~ s/\n( *\*)? */ /g;
         $description =~ s/\.?\s+$//;
         push @matches, [$name, $value, $description];
         ++$found;
     }
     if ($found) {
         my $include_name = $file;
         $include_name =~ s!.*/!!;
         push @necessary_include_files, $include_name;
     }
 }

 my $ll_old_define = "";
 my $hl_old_define = "";

 my $ll_code_check = "";
 my $hl_code_check = "";

 my $headers = "";
 my %included_headers;

 my %error_codes_seen;

 foreach my $match (@matches)
 {
     my ($error_name, $error_code, $description) = @$match;

     die "Duplicated error code: $error_code ($error_name)\n"
         if( $error_codes_seen{$error_code}++ );

     $description =~ s/\\/\\\\/g;

     my ($module_name) = $error_name =~ /^MBEDTLS_ERR_([^_]+)/;

     # Fix faulty ones
     $module_name = "BIGNUM" if ($module_name eq "MPI");
     $module_name = "CTR_DRBG" if ($module_name eq "CTR");
     $module_name = "HMAC_DRBG" if ($module_name eq "HMAC");

     my $define_name = $module_name;
     $define_name = "X509_USE,X509_CREATE" if ($define_name eq "X509");
     $define_name = "ASN1_PARSE" if ($define_name eq "ASN1");
     $define_name = "SSL_TLS" if ($define_name eq "SSL");
     $define_name = "PEM_PARSE,PEM_WRITE" if ($define_name eq "PEM");

     my $include_name = $module_name;
     $include_name =~ tr/A-Z/a-z/;

     # Fix faulty ones
     $include_name = "net_sockets" if ($module_name eq "NET");

     $included_headers{"${include_name}.h"} = $module_name;

     my $found_ll = grep $_ eq $module_name, @low_level_modules;
     my $found_hl = grep $_ eq $module_name, @high_level_modules;
     if (!$found_ll && !$found_hl)
     {
         printf("Error: Do not know how to handle: $module_name\n");
         exit 1;
     }

     my $code_check;
     my $old_define;
     my $white_space;
     my $first;

     if ($found_ll)
     {
         $code_check = \$ll_code_check;
         $old_define = \$ll_old_define;
         $white_space = '        ';
     }
     else
     {
         $code_check = \$hl_code_check;
         $old_define = \$hl_old_define;
         $white_space = '        ';
     }

     if ($define_name ne ${$old_define})
     {
         if (${$old_define} ne "")
         {
             ${$code_check} .= "#endif /* ";
             $first = 0;
             foreach my $dep (split(/,/, ${$old_define}))
             {
                 ${$code_check} .= " || " if ($first++);
                 ${$code_check} .= "MBEDTLS_${dep}_C";
             }
             ${$code_check} .= " */\n\n";
         }

         ${$code_check} .= "#if ";
         $headers .= "#if " if ($include_name ne "");
         $first = 0;
         foreach my $dep (split(/,/, ${define_name}))
         {
             ${$code_check} .= " || " if ($first);
             $headers       .= " || " if ($first++);

             ${$code_check} .= "defined(MBEDTLS_${dep}_C)";
             $headers       .= "defined(MBEDTLS_${dep}_C)" if
                                                     ($include_name ne "");
         }
         ${$code_check} .= "\n";
         $headers .= "\n#include \"mbedtls/${include_name}.h\"\n".
                     "#endif\n\n" if ($include_name ne "");
         ${$old_define} = $define_name;
     }

     ${$code_check} .= "${white_space}case -($error_name):\n".
                       "${white_space}    return( \"$module_name - $description\" );\n"
 };

 if ($ll_old_define ne "")
 {
     $ll_code_check .= "#endif /* ";
     my $first = 0;
     foreach my $dep (split(/,/, $ll_old_define))
     {
         $ll_code_check .= " || " if ($first++);
         $ll_code_check .= "MBEDTLS_${dep}_C";
     }
     $ll_code_check .= " */\n";
 }
 if ($hl_old_define ne "")
 {
     $hl_code_check .= "#endif /* ";
     my $first = 0;
     foreach my $dep (split(/,/, $hl_old_define))
     {
         $hl_code_check .= " || " if ($first++);
         $hl_code_check .= "MBEDTLS_${dep}_C";
     }
     $hl_code_check .= " */\n";
 }

 $error_format =~ s/HEADER_INCLUDED\n/$headers/g;
 $error_format =~ s/LOW_LEVEL_CODE_CHECKS\n/$ll_code_check/g;
 $error_format =~ s/HIGH_LEVEL_CODE_CHECKS\n/$hl_code_check/g;

 open(ERROR_FILE, ">$error_file") or die "Opening destination file '$error_file': $!";
 print ERROR_FILE $error_format;
 close(ERROR_FILE);

 my $errors = 0;
 for my $include_name (@necessary_include_files)
 {
     if (not $included_headers{$include_name})
     {
         print STDERR "The header file \"$include_name\" defines error codes but has not been included!\n";
         ++$errors;
     }
 }

 exit !!$errors;
	#!/usr/bin/env perl

	# Generate error.c
	#
	# Usage: ./generate_errors.pl or scripts/generate_errors.pl without arguments,
	# or generate_errors.pl include_dir data_dir error_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;
	use warnings;

	my ($include_dir, $data_dir, $error_file);

	if( @ARGV ) {
	die "Invalid number of arguments" if scalar @ARGV != 3;
	($include_dir, $data_dir, $error_file) = @ARGV;

	-d $include_dir or die "No such directory: $include_dir\n";
	-d $data_dir or die "No such directory: $data_dir\n";
	} else {
	$include_dir = 'include/mbedtls';
	$data_dir = 'scripts/data_files';
	$error_file = 'library/error.c';

	unless( -d $include_dir && -d $data_dir ) {
	chdir '..' or die;
	-d $include_dir && -d $data_dir
	or die "Without arguments, must be run from root or scripts\n"
	}
	}

	my $error_format_file = $data_dir.'/error.fmt';

	my @low_level_modules = qw( AES ARIA ASN1 BASE64 BIGNUM
	CAMELLIA CCM CHACHA20 CHACHAPOLY CMAC CTR_DRBG DES
	ENTROPY ERROR GCM HKDF HMAC_DRBG MD5
	NET OID PADLOCK PBKDF2 PLATFORM POLY1305 RIPEMD160
	SHA1 SHA256 SHA512 THREADING );
	my @high_level_modules = qw( CIPHER DHM ECP MD
	PEM PK PKCS12 PKCS5
	RSA SSL X509 );

	undef $/;

	open(FORMAT_FILE, '<:crlf', "$error_format_file") or die "Opening error format file '$error_format_file': $!";
	my $error_format = <FORMAT_FILE>;
	close(FORMAT_FILE);

	my @files = <$include_dir/*.h>;
	my @necessary_include_files;
	my @matches;
	foreach my $file (@files) {
	open(FILE, '<:crlf', "$file");
	my $content = <FILE>;
	close FILE;
	my $found = 0;
	while ($content =~ m[
	# Both the before-comment and the after-comment are optional.
	# Only the comment content is a regex capture group. The comment
	# start and end parts are outside the capture group.
	(?:/\[!](?!<) # Doxygen before-comment start
	((?:[^]\|\+[^/])) # $1: Comment content (no */ inside)
	\*/)? # Comment end
	\s\#\sdefine\s+(MBEDTLS_ERR_\w+) # $2: name
	\s+\-(0[Xx][0-9A-Fa-f]+)\s* # $3: value (without the sign)
	(?:/\[!]< # Doxygen after-comment start
	((?:[^]\|\+[^/])) # $4: Comment content (no */ inside)
	\*/)? # Comment end
	]gsx) {
	my ($before, $name, $value, $after) = ($1, $2, $3, $4);
	# Discard Doxygen comments that are coincidentally present before
	# an error definition but not attached to it. This is ad hoc, based
	# on what actually matters (or mattered at some point).
	undef $before if defined($before) && $before =~ /\s*\\name\s/s;
	die "Description neither before nor after $name in $file\n"
	if !defined($before) && !defined($after);
	die "Description both before and after $name in $file\n"
	if defined($before) && defined($after);
	my $description = (defined($before) ? $before : $after);
	$description =~ s/^\s+//;
	$description =~ s/\n( \)? */ /g;
	$description =~ s/\.?\s+$//;
	push @matches, [$name, $value, $description];
	++$found;
	}
	if ($found) {
	my $include_name = $file;
	$include_name =~ s!.*/!!;
	push @necessary_include_files, $include_name;
	}
	}

	my $ll_old_define = "";
	my $hl_old_define = "";

	my $ll_code_check = "";
	my $hl_code_check = "";

	my $headers = "";
	my %included_headers;

	my %error_codes_seen;

	foreach my $match (@matches)
	{
	my ($error_name, $error_code, $description) = @$match;

	die "Duplicated error code: $error_code ($error_name)\n"
	if( $error_codes_seen{$error_code}++ );

	$description =~ s/\\/\\\\/g;

	my ($module_name) = $error_name =~ /^MBEDTLS_ERR_([^_]+)/;

	# Fix faulty ones
	$module_name = "BIGNUM" if ($module_name eq "MPI");
	$module_name = "CTR_DRBG" if ($module_name eq "CTR");
	$module_name = "HMAC_DRBG" if ($module_name eq "HMAC");

	my $define_name = $module_name;
	$define_name = "X509_USE,X509_CREATE" if ($define_name eq "X509");
	$define_name = "ASN1_PARSE" if ($define_name eq "ASN1");
	$define_name = "SSL_TLS" if ($define_name eq "SSL");
	$define_name = "PEM_PARSE,PEM_WRITE" if ($define_name eq "PEM");

	my $include_name = $module_name;
	$include_name =~ tr/A-Z/a-z/;

	# Fix faulty ones
	$include_name = "net_sockets" if ($module_name eq "NET");

	$included_headers{"${include_name}.h"} = $module_name;

	my $found_ll = grep $_ eq $module_name, @low_level_modules;
	my $found_hl = grep $_ eq $module_name, @high_level_modules;
	if (!$found_ll && !$found_hl)
	{
	printf("Error: Do not know how to handle: $module_name\n");
	exit 1;
	}

	my $code_check;
	my $old_define;
	my $white_space;
	my $first;

	if ($found_ll)
	{
	$code_check = \$ll_code_check;
	$old_define = \$ll_old_define;
	$white_space = ' ';
	}
	else
	{
	$code_check = \$hl_code_check;
	$old_define = \$hl_old_define;
	$white_space = ' ';
	}

	if ($define_name ne ${$old_define})
	{
	if (${$old_define} ne "")
	{
	${$code_check} .= "#endif /* ";
	$first = 0;
	foreach my $dep (split(/,/, ${$old_define}))
	{
	${$code_check} .= " \|\| " if ($first++);
	${$code_check} .= "MBEDTLS_${dep}_C";
	}
	${$code_check} .= " */\n\n";
	}

	${$code_check} .= "#if ";
	$headers .= "#if " if ($include_name ne "");
	$first = 0;
	foreach my $dep (split(/,/, ${define_name}))
	{
	${$code_check} .= " \|\| " if ($first);
	$headers .= " \|\| " if ($first++);

	${$code_check} .= "defined(MBEDTLS_${dep}_C)";
	$headers .= "defined(MBEDTLS_${dep}_C)" if
	($include_name ne "");
	}
	${$code_check} .= "\n";
	$headers .= "\n#include \"mbedtls/${include_name}.h\"\n".
	"#endif\n\n" if ($include_name ne "");
	${$old_define} = $define_name;
	}

	${$code_check} .= "${white_space}case -($error_name):\n".
	"${white_space} return( \"$module_name - $description\" );\n"
	};

	if ($ll_old_define ne "")
	{
	$ll_code_check .= "#endif /* ";
	my $first = 0;
	foreach my $dep (split(/,/, $ll_old_define))
	{
	$ll_code_check .= " \|\| " if ($first++);
	$ll_code_check .= "MBEDTLS_${dep}_C";
	}
	$ll_code_check .= " */\n";
	}
	if ($hl_old_define ne "")
	{
	$hl_code_check .= "#endif /* ";
	my $first = 0;
	foreach my $dep (split(/,/, $hl_old_define))
	{
	$hl_code_check .= " \|\| " if ($first++);
	$hl_code_check .= "MBEDTLS_${dep}_C";
	}
	$hl_code_check .= " */\n";
	}

	$error_format =~ s/HEADER_INCLUDED\n/$headers/g;
	$error_format =~ s/LOW_LEVEL_CODE_CHECKS\n/$ll_code_check/g;
	$error_format =~ s/HIGH_LEVEL_CODE_CHECKS\n/$hl_code_check/g;

	open(ERROR_FILE, ">$error_file") or die "Opening destination file '$error_file': $!";
	print ERROR_FILE $error_format;
	close(ERROR_FILE);

	my $errors = 0;
	for my $include_name (@necessary_include_files)
	{
	if (not $included_headers{$include_name})
	{
	print STDERR "The header file \"$include_name\" defines error codes but has not been included!\n";
	++$errors;
	}
	}

	exit !!$errors;