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<?php

$target = $_SERVER['argv'][1];

// clang warning based unused variables fixer.

//

// make 2> error.log

// grep "unused variables" error.log > error2.log

// php fixer.php <path.c>

$data = file_get_contents("error2.log");

$result = array();

foreach (explode("\n", $data) as $line) {

if (preg_match("!(.+?):(\d+):(\d+): warning: unused variable '(.+?)'!", $line, $match)) {

$filename = basename($match[1]);

$line = $match[2];

$columns = $match[3];

$name = $match[4];

if ($filename == $target) {

$result[$filename][] = array(

"line" => $line,

"columns" => $columns,

"name" => $name,

);

}

}

}

//var_dump($result);

$file = file_get_contents($target);

$lines = explode("\n", $file);

if (!isset($result[$target])) {

echo "nothing";

exit;

}

foreach ($result[$target] as $value) {

//echo $lines[$value['line']-1] . PHP_EOL;

$line = $lines[$value['line']-1];

$l = parseLine($line);

$l->remove($value['name']);

$hhh = $l->toLine();

$lines[$value['line']-1] = $hhh;

}

$buffer = "";

for ($i = 0; $i < count($lines); $i++) {

$line = $lines[$i];

if ($line == "==========REMOVED==========") {

continue;

}

$buffer .= $line;

if ($i + 1 < count($lines)) {

$buffer .= "\n";

}

}

//echo $buffer;exit;

file_put_contents($target, $buffer);

function parseLine($line)

{

for ($i = 0; $i < strlen($line); $i++) {

if ($line[$i] == "\t") {

continue;

} else {

break;

}

}

$l = new Line($i);

$arg = substr($line, $i);

$type = null;

$args = array();

$tmp = null;

$base = null;

foreach (explode(",", $arg) as $arg2) {

$tokens = preg_split("/(\s+|;)/", $arg2);

$cnt = count($tokens);

$state = 0;

for ($i = 0; $i < $cnt; $i++) {

if ($state == 0) {

if (empty($tokens[$i])) {

continue;

}

if (!$type) {

if ($tokens[$i] != "const") {

$type = $tokens[$i];

$state = 1;

if (!$tmp) {

$tmp = new Variable();

$tmp->setType($tokens[$i]);

$base = clone $tmp;

}

} else {

$tmp = new Variable();

$tmp->is_const = 1;

$tmp->setType($tokens[$i+1]);

$i++;

$state = 1;

$base = clone $tmp;

}

} else {

$state = 1;

$tmp = clone $base;

$tmp->setName($tokens[$i]);

}

} else if ($state == 1) {

if ($tokens[$i] == "=") {

$state = 2;

} else {

$tmp->setName($tokens[$i]);

}

} else if ($state == 2) {

$tmp->setDefault($tokens[$i]);

$l->add($tmp);

unset($tmp);

$state = 0;

}

}

if (isset($tmp)) {

$l->add($tmp);

}

}

return $l;

}

class Line

{

public $indent;

public $variables = array();

public function __construct($indent)

{

$this->indent = $indent;

}

public function add(Variable $var)

{

$this->variables[] = $var;

}

public function remove($name)

{

foreach ($this->variables as $o => $var) {

if ($var->name == $name) {

unset($this->variables[$o]);

}

}

}

public function isEmpty()

{

if (count($this->variables)) {

return false;

} else {

return true;

}

}

public function toLine()

{

$type = null;

$buffer = str_repeat("\t", $this->indent);

$values = array();

foreach ($this->variables as $var) {

if (!$type) {

if ($var->getNameWithPtr() === "") {

continue;

}

$type = $var->type;

if ($var->is_const) {

$buffer .= "const ";

}

$buffer .= sprintf("%s ", $var->type);

if ($var->default !== NULL) {

$values[] = sprintf("%s = %s", $var->getNameWithPtr(), $var->default);

} else {

$values[] = $var->getNameWithPtr();

}

} else {

if ($var->getNameWithPtr() === "") {

continue;

}

if ($var->default !== NULL) {

$values[] = sprintf("%s = %s", $var->getNameWithPtr(), $var->default);

} else {

$values[] = $var->getNameWithPtr();

}

}

}

if (count($values)) {

$buffer .= join(", ", $values);

} else {

return "==========REMOVED==========";

}

if (strlen($buffer) > $this->indent) {

$buffer .= ";";

}

$check = trim($buffer, " \t");

if (!$check) {

return "==========REMOVED==========";

}

return $buffer;

}

}

class Variable

{

public $name;

public $type;

public $default;

public $is_static;

public $is_const;

public $ptr = 0;

public function __construct()

{

}

public function setType($type)

{

$this->type = $type;

}

public function setName($name)

{

$ptr = 0;

for ($i =0; $i < strlen($name); $i++) {

if ($name[$i] == '*') {

$ptr++;

}

}

$this->name = substr($name, $ptr);

if ($ptr) {

$this->ptr = $ptr;

}

}

public function setPtr($ptr)

{

$this->ptr = $ptr;

}

public function setDefault($default)

{

$this->default = $default;

}

public function getNameWithPtr()

{

if ($this->name) {

return str_repeat("*", $this->ptr) . $this->name;

} else {

return "";

}

}

}