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279110f47a
MadelineProto/tools/TL/Builder.php
Daniil Gentili 279110f47a Fixup
2024-03-02 19:32:23 +01:00

357 lines
14 KiB
PHP
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<?php
declare(strict_types=1);
/**
* This file is part of MadelineProto.
* MadelineProto is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
* MadelineProto is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Affero General Public License for more details.
* You should have received a copy of the GNU General Public License along with MadelineProto.
* If not, see <http://www.gnu.org/licenses/>.
*
* @author Daniil Gentili <daniil@daniil.it>
* @copyright 2016-2023 Daniil Gentili <daniil@daniil.it>
* @license https://opensource.org/licenses/AGPL-3.0 AGPLv3
* @link https://docs.madelineproto.xyz MadelineProto documentation
*/
namespace danog\MadelineProto\TL;
use danog\MadelineProto\Settings\TLSchema;
/**
* @internal
*/
final class Builder
{
/**
* TL instance.
*/
private TL $TL;
private readonly array $byType;
private readonly array $idByPredicate;
private readonly array $typeByPredicate;
private array $needConstructors = [];
private array $needVector = [];
private const RECURSIVE_TYPES = [
'InputPeer',
'RichText',
'PageBlock',
];
public function __construct(
TLSchema $settings,
/**
* Output file.
*/
private string $output,
/**
* Output namespace.
*/
private string $namespace,
) {
$this->TL = new TL();
$this->TL->init($settings);
$byType = [];
$idByPredicate = ['vector' => var_export(hex2bin('1cb5c415'), true)];
foreach ($this->TL->getConstructors()->by_id as $id => $constructor) {
$byType[$constructor['type']][$id]= $constructor;
$idByPredicate[$constructor['predicate']] = var_export($id, true);
$typeByPredicate[$constructor['predicate']] = $constructor['type'];
}
$this->byType = $byType;
$this->idByPredicate = $idByPredicate;
$this->typeByPredicate = $typeByPredicate;
}
private static function escapeConstructorName(array $constructor): string
{
return str_replace(['.', ' '], '___', $constructor['predicate']).(isset($constructor['layer']) ?'_'.$constructor['layer'] : '');
}
private static function escapeTypeName(string $name): string
{
return str_replace(['.', ' '], '___', $name);
}
private function buildParam(array $param): string
{
['type' => $type] = $param;
if (isset($param['subtype'])) {
$this->needVector[$param['subtype']] = true;
$type = "array_of_{$param['subtype']}";
}
if (($param['name'] ?? null) === 'random_bytes') {
$type = $param['name'];
}
return match ($type) {
'#' => "unpack('V', stream_get_contents(\$stream, 4))[1]",
'int' => "unpack('l', stream_get_contents(\$stream, 4))[1]",
'long' => "unpack('q', stream_get_contents(\$stream, 8))[1]",
'double' => "unpack('d', stream_get_contents(\$stream, 8))[1]",
'Bool' => 'match (stream_get_contents($stream, 4)) {'.
$this->idByPredicate['boolTrue'].' => true,'.
$this->idByPredicate['boolFalse'].' => false, default => self::err($stream) }',
'strlong' => 'stream_get_contents($stream, 8)',
'int128' => 'stream_get_contents($stream, 16)',
'int256' => 'stream_get_contents($stream, 32)',
'int512' => 'stream_get_contents($stream, 64)',
default => isset($this->byType[$type]) && !\in_array($type, self::RECURSIVE_TYPES, true)
? $this->buildTypes($this->byType[$type], $type)
: "self::deserialize_type_{$this->escapeTypeName($type)}(\$stream)"
};
}
private function buildConstructorShort(string $predicate, array $params = []): string
{
if ($predicate === 'dataJSON') {
return 'json_decode('.$this->buildParam(['type' => 'string']).', true, 512, \\JSON_THROW_ON_ERROR)';
}
if ($predicate === 'jsonNull') {
return 'null';
}
$superBare = $this->typeByPredicate[$predicate] === 'JSONValue';
$result = '';
if (!$superBare) {
$result .= "[\n";
$result .= "'_' => '$predicate',\n";
}
foreach ($params as $param) {
$name = $param['name'];
if ($predicate === 'photoStrippedSize'
&& $name === 'bytes'
) {
$code = $this->buildParam(['type' => 'string']);
$code = "new Types\\Bytes(Tools::inflateStripped($code))";
$name = 'inflated';
} else {
$code = $this->buildParam($param);
}
if ($superBare) {
$result .= $code;
} else {
$result .= var_export($name, true)." => $code,\n";
}
}
if (!$superBare) {
$result .= ']';
}
return $result;
}
private function buildConstructor(string $predicate, array $params, array $flags): string
{
if (!$flags) {
return "return {$this->buildConstructorShort($predicate, $params)};";
}
$result = "\$tmp = ['_' => '$predicate'];\n";
$flagNames = [];
foreach ($flags as ['flag' => $flag]) {
$flagNames[$flag] = true;
}
foreach ($params as $param) {
$name = $param['name'];
if (!isset($param['pow'])) {
$code = $this->buildParam($param);
if (isset($flagNames[$name])) {
$result .= "\$$name = $code;\n";
} else {
$result .= "\$tmp['$name'] = $code;\n";
}
continue;
}
$flag = "(\${$param['flag']} & {$param['pow']}) !== 0";
if ($param['type'] === 'true') {
$result .= "\$tmp['$name'] = $flag;\n";
continue;
}
$code = $this->buildParam($param);
$result .= "if ($flag) \$tmp['$name'] = $code;\n";
}
return "$result\nreturn \$tmp;";
}
private function buildTypes(array $constructors, ?string $type = null): string
{
$typeMethod = $type ? "deserialize_type_".self::escapeTypeName($type) : 'deserialize';
$result = "match (stream_get_contents(\$stream, 4)) {\n";
foreach ($constructors as $id => $constructor) {
[
'predicate' => $name,
'flags' => $flags,
'params' => $params
] = $constructor;
if ($name === 'gzip_packed') {
continue;
}
if ($name === 'jsonObjectValue') {
continue;
}
$nameEscaped = self::escapeConstructorName($constructor);
if (!$flags) {
$params = $this->buildConstructorShort($name, $params);
$result .= var_export($id, true)." => $params,\n";
} else {
$this->needConstructors[$name] = true;
$result .= var_export($id, true)." => self::deserialize_$nameEscaped(\$stream),\n";
}
}
$result .= $this->idByPredicate['gzip_packed']." => self::$typeMethod(self::gzdecode(\$stream)),\n";
$result .= "default => self::err(\$stream)\n";
return $result."}\n";
}
private function buildVector(string $type, string $body): string
{
$result = '';
$result .= "private static function deserialize_type_array_of_{$this->escapeTypeName($type)}(mixed \$stream): mixed {\n";
$result .= "\$stream = match(stream_get_contents(\$stream, 4)) {\n";
$result .= $this->idByPredicate['vector']." => \$stream,\n";
$result .= $this->idByPredicate['gzip_packed']." => self::gzdecode_vector(\$stream)\n";
$result .= "};\n";
$result .= "\$result = [];\n";
$result .= "for (\$x = unpack('V', stream_get_contents(\$stream, 4))[1]; \$x > 0; \$x--) {\n";
$result .= "\$result []= {$body};";
$result .= "}\n";
$result .= "return \$result;\n";
$result .= "}\n";
return $result;
}
public function build(): void
{
$f = fopen($this->output, 'w');
fwrite($f, "<?php namespace {$this->namespace};\n/** @internal Autogenerated using tools/TL/Builder.php */\nfinal class TLParser {\n");
fwrite($f, 'private static function err(mixed $stream): never {
fseek($stream, -4, SEEK_CUR);
throw new AssertionError("Unexpected ID ".bin2hex(fread($stream, 4)));
}'."\n");
fwrite($f, "private static function gzdecode(mixed \$stream): mixed {
\$res = fopen('php://memory', 'rw+b');
fwrite(\$res, gzdecode(self::deserialize_type_bytes(\$stream)));
rewind(\$res);
return \$res;
}\n");
fwrite($f, "private static function gzdecode_vector(mixed \$stream): mixed {
\$res = fopen('php://memory', 'rw+b');
fwrite(\$res, gzdecode(self::deserialize_type_bytes(\$stream)));
rewind(\$res);
return match (stream_get_contents(\$stream, 4)) {
{$this->idByPredicate['vector']} => \$stream,
default => self::err(\$stream)
};
}\n");
$block_str = '
$l = \ord(stream_get_contents($stream, 1));
if ($l > 254) {
throw new Exception(Lang::$current_lang["length_too_big"]);
}
if ($l === 254) {
$l = unpack("V", stream_get_contents($stream, 3).\chr(0))[1];
$x = stream_get_contents($stream, $l);
$resto = (-$l) % 4;
$resto = $resto < 0 ? $resto + 4 : $resto;
if ($resto > 0) {
stream_get_contents($stream, $resto);
}
} else {
$x = $l ? stream_get_contents($stream, $l) : "";
$resto = (-$l+1) % 4;
$resto = $resto < 0 ? $resto + 4 : $resto;
if ($resto > 0) {
stream_get_contents($stream, $resto);
}
}'."\n";
fwrite($f, "private static function deserialize_type_bytes(mixed \$stream): mixed {
$block_str
return new Types\Bytes(\$x);
}\n");
fwrite($f, "private static function deserialize_type_string(mixed \$stream): mixed {
$block_str
return \$x;
}\n");
fwrite($f, "private static function deserialize_type_waveform(mixed \$stream): mixed {
$block_str
return TL::extractWaveform(\$x);
}\n");
fwrite($f, 'private static function deserialize_type_random_bytes(mixed $stream): void {
$l = \ord(stream_get_contents($stream, 1));
if ($l > 254) {
throw new Exception(Lang::$current_lang["length_too_big"]);
}
if ($l === 254) {
$l = unpack("V", stream_get_contents($stream, 3).\chr(0))[1];
if ($l < 15) {
throw new SecurityException("Random_bytes is too small!");
}
} else {
if ($l < 15) {
throw new SecurityException("Random_bytes is too small!");
}
$l += 1;
}
$resto = (-$l) % 4;
$resto = $resto < 0 ? $resto + 4 : $resto;
if ($resto > 0) {
$l += $resto;
}
stream_get_contents($stream, $l);
}
');
fwrite($f, 'private static function deserialize_type_array_of_JSONObjectValue(mixed $stream): array {
$stream = match(stream_get_contents($stream, 4)) {
'.$this->idByPredicate["vector"].' => $stream,
'.$this->idByPredicate["gzip_packed"].' => self::gzdecode_vector($stream)
};
$result = [];
for ($x = unpack("V", stream_get_contents($stream, 4))[1]; $x > 0; $x--) {
$result['.$this->buildParam(['type' => 'string']).'] = '.$this->buildParam(['type' => 'JSONValue']).';
}
return $result;
}
');
fwrite($f, "final public function deserialize(mixed \$stream): mixed {\n");
fwrite($f, "return {$this->buildTypes($this->TL->getConstructors()->by_id)};");
fwrite($f, "}\n");
foreach ($this->TL->getConstructors()->by_id as $id => $constructor) {
['predicate' => $name, 'flags' => $flags, 'params' => $params, 'type' => $type] = $constructor;
if ($name === 'jsonObjectValue') {
continue;
}
if ($name === 'dataJSON') {
continue;
}
if ($type === 'JSONValue') {
continue;
}
if ($name === 'gzip_packed') {
continue;
}
$nameEscaped = self::escapeConstructorName($constructor);
fwrite($f, "private static function deserialize_$nameEscaped(mixed \$stream): mixed {\n");
fwrite($f, "{$this->buildConstructor($name, $params, $flags)}\n");
fwrite($f, "}\n");
}
foreach ($this->byType as $type => $constructors) {
if ($type === 'JSONObjectValue') {
continue;
}
fwrite($f, "private static function deserialize_type_{$this->escapeTypeName($type)}(mixed \$stream): mixed {\n");
fwrite($f, "return {$this->buildTypes($constructors, $type)};");
fwrite($f, "}\n");
if (isset($this->needVector[$type])) {
fwrite($f, $this->buildVector($type, $this->buildTypes($constructors, "array_of_$type")));
}
}
foreach (['int', 'long', 'double', 'strlong'] as $type) {
fwrite($f, $this->buildVector($type, $this->buildParam(['type' => $type])));
}
fwrite($f, "}\n");
}
}
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