Template::parseTemplate() - Code Metrics - Inspection of "Improve the code" - stenin-nikita/PHP-Yacc - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( 77aa03...453f7d )

by Nikita

created 2018-02-04 20:22 UTC

Template::parseTemplate() D

↳ Parent: Template

Complexity

Conditions	10
Paths	12

Size

Total Lines	31
Code Lines	23

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	10
eloc	23
nc	12
nop	1
dl	0
loc	31
rs	4.8196
c	0
b	0
f	0

How to fix Complexity

<?php
/**
 * This file is part of PHP-Yacc package.
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
declare(strict_types=1);

namespace PhpYacc\CodeGen;

use PhpYacc\Compress\Compress;
use PhpYacc\Compress\CompressResult;
use PhpYacc\Exception\LogicException;
use PhpYacc\Exception\TemplateException;
use PhpYacc\Grammar\Context;
use PhpYacc\Support\Utils;
use PhpYacc\Yacc\Macro\DollarExpansion;

class Template
{
    /**
     * @var string
     */
    protected $metaChar = '$';

    /**
     * @var array
     */
    protected $template = [];

    /**
     * @var int
     */
    protected $lineNumber = 0;

    /**
     * @var bool
     */
    protected $copyHeader = false;

    /**
     * @var Context
     */
    protected $context;

    /**
     * @var CompressResult
     */
    protected $compress;

    /**
     * @var Language
     */
    protected $language;

    /**
     * Template constructor.
     *
     * @param Language $language
     * @param string   $template
     * @param Context  $context
     *
     * @throws TemplateException
     */
    public function __construct(Language $language, string $template, Context $context)
    {
        $this->language = $language;
        $this->context = $context;

        $this->parseTemplate($template);
    }

    /**
     * @param CompressResult $result
     * @param $resultFile
     * @param null $headerFile
     *
     * @throws LogicException
     * @throws TemplateException
     */
    public function render(CompressResult $result, $resultFile, $headerFile = null)
    {
        $headerFile = $headerFile ?: \fopen('php://memory', 'rw');

        $this->language->begin($resultFile, $headerFile);

        $this->compress = $result;
        unset($result);

        $skipMode = false;
        $lineChanged = false;
        $tailCode = false;
        $reduceMode = [
            'enabled' => false,
            'm'       => -1,
            'n'       => 0,
            'mac'     => [],
        ];
        $tokenMode = [
            'enabled' => false,
            'mac'     => [],
        ];
        $buffer = '';

        foreach ($this->template as $line) {
            $line .= "\n";
            if ($tailCode) {
                $this->language->write($buffer.$line);
                continue;
            }

            if ($skipMode) {
                if ($this->metaMatch(\ltrim($line), 'endif')) {
                    $skipMode = false;
                }
                continue;
            }

            if ($reduceMode['enabled']) {
                if ($this->metaMatch(\trim($line), 'endreduce')) {
                    $reduceMode['enabled'] = false;
                    $this->lineNumber++;
                    if ($reduceMode['m'] < 0) {
                        $reduceMode['m'] = $reduceMode['n'];
                    }

                    foreach ($this->context->grams as $gram) {
                        if ($gram->action) {
                            for ($j = 0; $j < $reduceMode['m']; $j++) {
                                $this->expandMacro($reduceMode['mac'][$j], $gram->num, null);
                            }
                        } else {
                            for ($j = $reduceMode['m']; $j < $reduceMode['n']; $j++) {
                                $this->expandMacro($reduceMode['mac'][$j], $gram->num, null);
                            }
                        }
                    }
                    continue;
                } elseif ($this->metaMatch(\trim($line), 'noact')) {
                    $reduceMode['m'] = $reduceMode['n'];
                    continue;
                }
                $reduceMode['mac'][$reduceMode['n']++] = $line;
                continue;
            }

            if ($tokenMode['enabled']) {
                if ($this->metaMatch(\trim($line), 'endtokenval')) {
                    $tokenMode['enabled'] = false;
                    $this->lineNumber++;
                    for ($i = 1; $i < $this->context->countTerminals; $i++) {
                        $symbol = $this->context->symbol($i);
                        if ($symbol->name[0] != '\'') {
                            $str = $symbol->name;
                            if ($i === 1) {
                                $str = 'YYERRTOK';
                            }
                            foreach ($tokenMode['mac'] as $mac) {
                                $this->expandMacro($mac, $symbol->value, $str);
                            }
                        }
                    }
                } else {
                    $tokenMode['mac'][] = $line;
                }
                continue;
            }
            $p = $line;
            $buffer = '';
            for ($i = 0; $i < \mb_strlen($line); $i++) {
                $p = \mb_substr($line, $i);
                if ($p[0] !== $this->metaChar) {
                    $buffer .= $line[$i];
                } elseif ($i + 1 < \mb_strlen($line) && $p[1] === $this->metaChar) {
                    $i++;
                    $buffer .= $this->metaChar;
                } elseif ($this->metaMatch($p, '(')) {
                    $start = $i + 2;
                    $val = \mb_substr($p, 2);
                    while ($i < \mb_strlen($line) && $line[$i] !== ')') {
                        $i++;
                    }
                    if (!isset($line[$i])) {
                        throw new TemplateException('$(: missing ")"');
                    }
                    $length = $i - $start;

                    $buffer .= $this->genValueOf(\mb_substr($val, 0, $length));
                } elseif ($this->metaMatch($p, 'TYPEOF(')) {
                    throw new LogicException('TYPEOF is not implemented');
                } else {
                    break;
                }
            }
            if (isset($p[0]) && $p[0] === $this->metaChar) {
                if (\trim($buffer) !== '') {
                    throw new TemplateException('Non-blank character before $-keyword');
                }
                if ($this->metaMatch($p, 'header')) {
                    $this->copyHeader = true;
                } elseif ($this->metaMatch($p, 'endheader')) {
                    $this->copyHeader = false;
                } elseif ($this->metaMatch($p, 'tailcode')) {
                    //$this->printLine();

                    $tailCode = true;
                    continue;
                } elseif ($this->metaMatch($p, 'verification-table')) {
                    throw new TemplateException('verification-table is not implemented');
                } elseif ($this->metaMatch($p, 'union')) {
                    throw new TemplateException('union is not implemented');
                } elseif ($this->metaMatch($p, 'tokenval')) {
                    $tokenMode = [
                        'enabled' => true,
                        'mac'     => [],
                    ];
                } elseif ($this->metaMatch($p, 'reduce')) {
                    $reduceMode = [
                        'enabled' => true,
                        'm'       => -1,
                        'n'       => 0,
                        'mac'     => [],
                    ];
                } elseif ($this->metaMatch($p, 'switch-for-token-name')) {
                    for ($i = 0; $i < $this->context->countTerminals; $i++) {
                        if ($this->context->cTermIndex[$i] >= 0) {
                            $symbol = $this->context->symbol($i);
                            $this->language->caseBlock($buffer, $symbol->value, $symbol->name);
                        }
                    }
                } elseif ($this->metaMatch($p, 'production-strings')) {
                    foreach ($this->context->grams as $gram) {
                        $info = \array_slice($gram->body, 0);
                        $this->language->write($buffer.'"');
                        $this->language->writeQuoted($info[0]->name);
                        $this->language->writeQuoted(' :');
                        if (\count($info) === 1) {
                            $this->language->writeQuoted(' /* empty */');
                        }
                        for ($i = 1; $i < \count($info); $i++) {
for ($i=0; $i<count($array); $i++) { // calls count() on each iteration
}

// Better
for ($i=0, $c=count($array); $i<$c; $i++) { // calls count() just once
}
                            $this->language->writeQuoted(' '.$info[$i]->name);
                        }
                        if ($gram->num + 1 === $this->context->countGrams) {
                            $this->language->write("\"\n");
                        } else {
                            $this->language->write("\",\n");
                        }
                    }
                } elseif ($this->metaMatch($p, 'listvar')) {
                    $var = \trim(\mb_substr($p, 9));
                    $this->genListVar($buffer, $var);
                } elseif ($this->metaMatch($p, 'ifnot')) {
                    $skipMode = $skipMode || !$this->skipIf($p);
                } elseif ($this->metaMatch($p, 'if')) {
                    $skipMode = $skipMode || $this->skipIf($p);
                } elseif ($this->metaMatch($p, 'endif')) {
                    $skipMode = false;
                } else {
                    throw new TemplateException("Unknown \$: $line");
                }
                $lineChanged = true;
            } else {
                if ($lineChanged) {
                    //$this->printLine();

                    $lineChanged = false;
                }
                $this->language->write($buffer, $this->copyHeader);
            }
        }

        $this->language->commit();
    }

    /**
     * @param $spec string
     *
     * @throws TemplateException
     *
     * @return bool
     */
    protected function skipIf(string $spec): bool
    {
        [ $dump, $test ] = \explode(' ', $spec, 2);
function someFunction() {
    $x = 5;
    echo $x;
}

        $test = \trim($test);
function someFunction() {
    $x = 5;
    echo $x;
}
        switch ($test) {
            case '-a':
                return $this->context->aflag;

            case '-t':
                return $this->context->tflag;

            case '-p':
                return (bool) $this->context->className;

            case '%union':
                return (bool) $this->context->unioned;

            case '%pure_parser':
                return $this->context->pureFlag;

            default:
                throw new TemplateException("$dump: unknown switch: $test");
        }
    }

    /**
     * @param string      $def
     * @param int         $value
     * @param string|null $str
     */
    protected function expandMacro(string $def, int $value, string $str = null)
    {
        $result = '';
        for ($i = 0; $i < \mb_strlen($def); $i++) {
            $p = $def[$i];
            if ($p === '%') {
                $p = $def[++$i];
                switch ($p) {
                    case 'n':
                        $result .= \sprintf('%d', $value);
                        break;

                    case 's':
                        $result .= $str !== null ? $str : '';
                        break;

                    case 'b':
                        $gram = $this->context->gram($value);
                        $this->printLine($gram->position);
                        $result .= $gram->action;
                        break;

                    default:
                        $result .= $p;
                        break;
                }
            } else {
                $result .= $p;
            }
        }

        $this->language->write($result, $this->copyHeader);
    }

    /**
     * @param string $indent
     * @param string $var
     *
     * @throws TemplateException
     */
    protected function genListVar(string $indent, string $var)
    {
        $size = -1;
        if (isset($this->compress->$var)) {
            $array = $this->compress->$var;
            if (isset($this->compress->{$var.'size'})) {
                $size = $this->compress->{$var.'size'};
            } elseif ($var === 'yydefault') {
                $size = $this->context->countNonLeafStates;
            } elseif (\in_array($var, ['yygbase', 'yygdefault'])) {
                $size = $this->context->countNonTerminals;
            } elseif (\in_array($var, ['yylhs', 'yylen'])) {
                $size = $this->context->countGrams;
            }
            $this->printArray($array, $size < 0 ? count($array) : $size, $indent);
        } elseif ($var === 'terminals') {
            $nl = 0;
            foreach ($this->context->terminals as $term) {
                if ($this->context->cTermIndex[$term->code] >= 0) {
                    $prefix = $nl++ ? ",\n" : '';
                    $this->language->write($prefix.$indent.'"');
                    $this->language->writeQuoted($term->name);
                    $this->language->write('"');
                }
            }
            $this->language->write("\n");
        } elseif ($var === 'nonterminals') {
            $nl = 0;
            foreach ($this->context->nonterminals as $nonterm) {
                $prefix = $nl++ ? ",\n" : '';
                $this->language->write($prefix.$indent.'"');
                $this->language->writeQuoted($nonterm->name);
                $this->language->write('"');
            }
            $this->language->write("\n");
        } else {
            throw new TemplateException("\$listvar: unknown variable $var");
        }
    }

    /**
     * @param array  $array
     * @param int    $limit
     * @param string $indent
     */
    protected function printArray(array $array, int $limit, string $indent)
    {
        $col = 0;
        for ($i = 0; $i < $limit; $i++) {
            if ($col === 0) {
                $this->language->write($indent);
            }
            $this->language->write(\sprintf($i + 1 === $limit ? '%5d' : '%5d,', $array[$i]));
            if (++$col === 10) {
                $this->language->write("\n");
                $col = 0;
            }
        }
        if ($col !== 0) {
            $this->language->write("\n");
        }
    }

    /**
     * @param string $var
     *
     * @throws TemplateException
     *
     * @return string
     */
    protected function genValueOf(string $var): string
    {
        switch ($var) {
            case 'YYSTATES':
                return \sprintf('%d', $this->context->countStates);
            case 'YYNLSTATES':
                return \sprintf('%d', $this->context->countNonLeafStates);
            case 'YYINTERRTOK':
                return \sprintf('%d', $this->compress->yytranslate[$this->context->errorToken->value]);
            case 'YYUNEXPECTED':
                return \sprintf('%d', Compress::UNEXPECTED);
            case 'YYDEFAULT':
                return \sprintf('%d', Compress::DEFAULT);
            case 'YYMAXLEX':
                return \sprintf('%d', \count($this->compress->yytranslate));
            case 'YYLAST':
                return \sprintf('%d', \count($this->compress->yyaction));
            case 'YYGLAST':
                return \sprintf('%d', \count($this->compress->yygoto));
            case 'YYTERMS':
            case 'YYBADCH':
                return \sprintf('%d', $this->compress->yyncterms);
            case 'YYNONTERMS':
                return \sprintf('%d', $this->context->countNonTerminals);
            case 'YY2TBLSTATE':
                return \sprintf('%d', $this->compress->yybasesize - $this->context->countNonLeafStates);
            case 'CLASSNAME':
            case '-p':
                return $this->context->className ?: 'yy';
            default:
                throw new TemplateException("Unknown variable: \$($var)");
        }
    }

    /**
     * @param string $template
     *
     * @throws TemplateException
     */
    protected function parseTemplate(string $template)
    {
        $template = \preg_replace("(\r\n|\r)", "\n", $template);
        $lines = \explode("\n", $template);
        $this->lineNumber = 1;
        $skip = false;

        foreach ($lines as $line) {
            $p = $line;
            if ($skip) {
                $this->template[] = $line;
                continue;
            }
            while (\mb_strlen($p) > 0 && Utils::isWhite($p[0])) {
                $p = \mb_substr($p, 1);
            }
            $this->lineNumber++;
            if ($this->metaMatch($p, 'include')) {
                $skip = true;
            } elseif ($this->metaMatch($p, 'meta')) {
                if (!isset($p[6]) || Utils::isWhite($p[6])) {
                    throw new TemplateException("\$meta: missing character in definition: $p");
                }
                $this->metaChar = $p[6];
            } elseif ($this->metaMatch($p, 'semval')) {
                $this->defSemvalMacro(\mb_substr($p, 7));
            } else {
                $this->template[] = $line;
            }
        }
    }

    /**
     * @param string $text
     * @param string $keyword
     *
     * @return bool
     */
    protected function metaMatch(string $text, string $keyword): bool
    {
        return isset($text[0]) && $text[0] === $this->metaChar && \mb_substr($text, 1, \mb_strlen($keyword)) === $keyword;
    }

    /**
     * @param string $macro
     *
     * @throws TemplateException
     */
    protected function defSemvalMacro(string $macro)
    {
        if (\mb_strpos($macro, '($)') !== false) {
            $this->context->macros[DollarExpansion::SEMVAL_LHS_UNTYPED] = \ltrim(\mb_substr($macro, 3));
        } elseif (\mb_strpos($macro, '($,%t)') !== false) {
            $this->context->macros[DollarExpansion::SEMVAL_LHS_TYPED] = \ltrim(\mb_substr($macro, 6));
        } elseif (\mb_strpos($macro, '(%n)') !== false) {
            $this->context->macros[DollarExpansion::SEMVAL_RHS_UNTYPED] = \ltrim(\mb_substr($macro, 4));
        } elseif (\mb_strpos($macro, '(%n,%t)') !== false) {
            $this->context->macros[DollarExpansion::SEMVAL_RHS_TYPED] = \ltrim(\mb_substr($macro, 7));
        } else {
            throw new TemplateException("\$semval: bad format $macro");
        }
    }

    /**
     * @param int         $line
     * @param string|null $filename
     */
    protected function printLine(int $line = -1, string $filename = null)
    {
        $line = $line === -1 ? $this->lineNumber : $line;
        $filename = $filename ?? $this->context->filename;

        $this->language->inlineComment(\sprintf('%s:%d', $filename, $line));
    }
}


1			<?php
2			/**
3			* This file is part of PHP-Yacc package.
4			*
5			* For the full copyright and license information, please view the LICENSE
6			* file that was distributed with this source code.
7			*/
8			declare(strict_types=1);
9
10			namespace PhpYacc\CodeGen;
11
12			use PhpYacc\Compress\Compress;
13			use PhpYacc\Compress\CompressResult;
14			use PhpYacc\Exception\LogicException;
15			use PhpYacc\Exception\TemplateException;
16			use PhpYacc\Grammar\Context;
17			use PhpYacc\Support\Utils;
18			use PhpYacc\Yacc\Macro\DollarExpansion;
19
20			class Template
21			{
22			/**
23			* @var string
24			*/
25			protected $metaChar = '$';
26
27			/**
28			* @var array
29			*/
30			protected $template = [];
31
32			/**
33			* @var int
34			*/
35			protected $lineNumber = 0;
36
37			/**
38			* @var bool
39			*/
40			protected $copyHeader = false;
41
42			/**
43			* @var Context
44			*/
45			protected $context;
46
47			/**
48			* @var CompressResult
49			*/
50			protected $compress;
51
52			/**
53			* @var Language
54			*/
55			protected $language;
56
57			/**
58			* Template constructor.
59			*
60			* @param Language $language
61			* @param string $template
62			* @param Context $context
63			*
64			* @throws TemplateException
65			*/
66			public function __construct(Language $language, string $template, Context $context)
67			{
68			$this->language = $language;
69			$this->context = $context;
70
71			$this->parseTemplate($template);
72			}
73
74			/**
75			* @param CompressResult $result
76			* @param $resultFile
77			* @param null $headerFile
78			*
79			* @throws LogicException
80			* @throws TemplateException
81			*/
82			public function render(CompressResult $result, $resultFile, $headerFile = null)
83			{
84			$headerFile = $headerFile ?: \fopen('php://memory', 'rw');
85
86			$this->language->begin($resultFile, $headerFile);
87
88			$this->compress = $result;
89			unset($result);
90
91			$skipMode = false;
92			$lineChanged = false;
93			$tailCode = false;
94			$reduceMode = [
95			'enabled' => false,
96			'm' => -1,
97			'n' => 0,
98			'mac' => [],
99			];
100			$tokenMode = [
101			'enabled' => false,
102			'mac' => [],
103			];
104			$buffer = '';
105
106			foreach ($this->template as $line) {
107			$line .= "\n";
108			if ($tailCode) {
109			$this->language->write($buffer.$line);
110			continue;
111			}
112
113			if ($skipMode) {
114			if ($this->metaMatch(\ltrim($line), 'endif')) {
115			$skipMode = false;
116			}
117			continue;
118			}
119
120			if ($reduceMode['enabled']) {
121			if ($this->metaMatch(\trim($line), 'endreduce')) {
122			$reduceMode['enabled'] = false;
123			$this->lineNumber++;
124			if ($reduceMode['m'] < 0) {
125			$reduceMode['m'] = $reduceMode['n'];
126			}
127
128			foreach ($this->context->grams as $gram) {
129			if ($gram->action) {
130			for ($j = 0; $j < $reduceMode['m']; $j++) {
131			$this->expandMacro($reduceMode['mac'][$j], $gram->num, null);
132			}
133			} else {
134			for ($j = $reduceMode['m']; $j < $reduceMode['n']; $j++) {
135			$this->expandMacro($reduceMode['mac'][$j], $gram->num, null);
136			}
137			}
138			}
139			continue;
140			} elseif ($this->metaMatch(\trim($line), 'noact')) {
141			$reduceMode['m'] = $reduceMode['n'];
142			continue;
143			}
144			$reduceMode['mac'][$reduceMode['n']++] = $line;
145			continue;
146			}
147
148			if ($tokenMode['enabled']) {
149			if ($this->metaMatch(\trim($line), 'endtokenval')) {
150			$tokenMode['enabled'] = false;
151			$this->lineNumber++;
152			for ($i = 1; $i < $this->context->countTerminals; $i++) {
153			$symbol = $this->context->symbol($i);
154			if ($symbol->name[0] != '\'') {
155			$str = $symbol->name;
156			if ($i === 1) {
157			$str = 'YYERRTOK';
158			}
159			foreach ($tokenMode['mac'] as $mac) {
160			$this->expandMacro($mac, $symbol->value, $str);
161			}
162			}
163			}
164			} else {
165			$tokenMode['mac'][] = $line;
166			}
167			continue;
168			}
169			$p = $line;
170			$buffer = '';
171			for ($i = 0; $i < \mb_strlen($line); $i++) {
172			$p = \mb_substr($line, $i);
173			if ($p[0] !== $this->metaChar) {
174			$buffer .= $line[$i];
175			} elseif ($i + 1 < \mb_strlen($line) && $p[1] === $this->metaChar) {
176			$i++;
177			$buffer .= $this->metaChar;
178			} elseif ($this->metaMatch($p, '(')) {
179			$start = $i + 2;
180			$val = \mb_substr($p, 2);
181			while ($i < \mb_strlen($line) && $line[$i] !== ')') {
182			$i++;
183			}
184			if (!isset($line[$i])) {
185			throw new TemplateException('$(: missing ")"');
186			}
187			$length = $i - $start;
188
189			$buffer .= $this->genValueOf(\mb_substr($val, 0, $length));
190			} elseif ($this->metaMatch($p, 'TYPEOF(')) {
191			throw new LogicException('TYPEOF is not implemented');
192			} else {
193			break;
194			}
195			}
196			if (isset($p[0]) && $p[0] === $this->metaChar) {
197			if (\trim($buffer) !== '') {
198			throw new TemplateException('Non-blank character before $-keyword');
199			}
200			if ($this->metaMatch($p, 'header')) {
201			$this->copyHeader = true;
202			} elseif ($this->metaMatch($p, 'endheader')) {
203			$this->copyHeader = false;
204			} elseif ($this->metaMatch($p, 'tailcode')) {
205			//$this->printLine();
			0 ignored issues – show Unused Code Comprehensibility introduced 2018-02-04 20:24 UTC by Report Bug Copy Issue Report `84%` of this comment could be valid code. Did you maybe forget this after debugging? Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it. The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production. This check looks for comments that seem to be mostly valid code and reports them. Loading history...
206			$tailCode = true;
207			continue;
208			} elseif ($this->metaMatch($p, 'verification-table')) {
209			throw new TemplateException('verification-table is not implemented');
210			} elseif ($this->metaMatch($p, 'union')) {
211			throw new TemplateException('union is not implemented');
212			} elseif ($this->metaMatch($p, 'tokenval')) {
213			$tokenMode = [
214			'enabled' => true,
215			'mac' => [],
216			];
217			} elseif ($this->metaMatch($p, 'reduce')) {
218			$reduceMode = [
219			'enabled' => true,
220			'm' => -1,
221			'n' => 0,
222			'mac' => [],
223			];
224			} elseif ($this->metaMatch($p, 'switch-for-token-name')) {
225			for ($i = 0; $i < $this->context->countTerminals; $i++) {
226			if ($this->context->cTermIndex[$i] >= 0) {
227			$symbol = $this->context->symbol($i);
228			$this->language->caseBlock($buffer, $symbol->value, $symbol->name);
229			}
230			}
231			} elseif ($this->metaMatch($p, 'production-strings')) {
232			foreach ($this->context->grams as $gram) {
233			$info = \array_slice($gram->body, 0);
234			$this->language->write($buffer.'"');
235			$this->language->writeQuoted($info[0]->name);
236			$this->language->writeQuoted(' :');
237			if (\count($info) === 1) {
238			$this->language->writeQuoted(' /* empty */');
239			}
240			for ($i = 1; $i < \count($info); $i++) {
			0 ignored issues – show Performance Best Practice introduced 2017-12-27 06:59 UTC by Report Bug Copy Issue Report It seems like you are calling the size function `count()` as part of the test condition. You might want to compute the size beforehand, and not on each iteration. If the size of the collection does not change during the iteration, it is generally a good practice to compute it beforehand, and not on each iteration: for ($i=0; $i<count($array); $i++) { // calls count() on each iteration } // Better for ($i=0, $c=count($array); $i<$c; $i++) { // calls count() just once } Loading history...
241			$this->language->writeQuoted(' '.$info[$i]->name);
242			}
243			if ($gram->num + 1 === $this->context->countGrams) {
244			$this->language->write("\"\n");
245			} else {
246			$this->language->write("\",\n");
247			}
248			}
249			} elseif ($this->metaMatch($p, 'listvar')) {
250			$var = \trim(\mb_substr($p, 9));
251			$this->genListVar($buffer, $var);
252			} elseif ($this->metaMatch($p, 'ifnot')) {
253			$skipMode = $skipMode \|\| !$this->skipIf($p);
254			} elseif ($this->metaMatch($p, 'if')) {
255			$skipMode = $skipMode \|\| $this->skipIf($p);
256			} elseif ($this->metaMatch($p, 'endif')) {
257			$skipMode = false;
258			} else {
259			throw new TemplateException("Unknown \$: $line");
260			}
261			$lineChanged = true;
262			} else {
263			if ($lineChanged) {
264			//$this->printLine();
			0 ignored issues – show Unused Code Comprehensibility introduced 2018-02-04 20:24 UTC by Report Bug Copy Issue Report `84%` of this comment could be valid code. Did you maybe forget this after debugging? Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it. The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production. This check looks for comments that seem to be mostly valid code and reports them. Loading history...
265			$lineChanged = false;
266			}
267			$this->language->write($buffer, $this->copyHeader);
268			}
269			}
270
271			$this->language->commit();
272			}
273
274			/**
275			* @param $spec string
276			*
277			* @throws TemplateException
278			*
279			* @return bool
280			*/
281			protected function skipIf(string $spec): bool
282			{
283			[ $dump, $test ] = \explode(' ', $spec, 2);
			0 ignored issues – show Bug introduced 2017-12-27 06:59 UTC by Report Bug Copy Issue Report The variable `$dump` does not exist. Did you forget to declare it? This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug. Loading history... Bug introduced 2017-12-27 06:59 UTC by Report Bug Copy Issue Report The variable `$test` seems only to be defined at a later point. Did you maybe move this code here without moving the variable definition? This error can happen if you refactor code and forget to move the variable initialization. Let’s take a look at a simple example: function someFunction() { $x = 5; echo $x; } The above code is perfectly fine. Now imagine that we re-order the statements: function someFunction() { echo $x; $x = 5; } In that case, `$x` would be read before it is initialized. This was a very basic example, however the principle is the same for the found issue. Loading history...
284
285			$test = \trim($test);
			0 ignored issues – show Bug introduced 2017-12-27 06:59 UTC by Report Bug Copy Issue Report The variable `$test` seems only to be defined at a later point. Did you maybe move this code here without moving the variable definition? This error can happen if you refactor code and forget to move the variable initialization. Let’s take a look at a simple example: function someFunction() { $x = 5; echo $x; } The above code is perfectly fine. Now imagine that we re-order the statements: function someFunction() { echo $x; $x = 5; } In that case, `$x` would be read before it is initialized. This was a very basic example, however the principle is the same for the found issue. Loading history...
286			switch ($test) {
287			case '-a':
288			return $this->context->aflag;
289
290			case '-t':
291			return $this->context->tflag;
292
293			case '-p':
294			return (bool) $this->context->className;
295
296			case '%union':
297			return (bool) $this->context->unioned;
298
299			case '%pure_parser':
300			return $this->context->pureFlag;
301
302			default:
303			throw new TemplateException("$dump: unknown switch: $test");
304			}
305			}
306
307			/**
308			* @param string $def
309			* @param int $value
310			* @param string\|null $str
311			*/
312			protected function expandMacro(string $def, int $value, string $str = null)
313			{
314			$result = '';
315			for ($i = 0; $i < \mb_strlen($def); $i++) {
316			$p = $def[$i];
317			if ($p === '%') {
318			$p = $def[++$i];
319			switch ($p) {
320			case 'n':
321			$result .= \sprintf('%d', $value);
322			break;
323
324			case 's':
325			$result .= $str !== null ? $str : '';
326			break;
327
328			case 'b':
329			$gram = $this->context->gram($value);
330			$this->printLine($gram->position);
331			$result .= $gram->action;
332			break;
333
334			default:
335			$result .= $p;
336			break;
337			}
338			} else {
339			$result .= $p;
340			}
341			}
342
343			$this->language->write($result, $this->copyHeader);
344			}
345
346			/**
347			* @param string $indent
348			* @param string $var
349			*
350			* @throws TemplateException
351			*/
352			protected function genListVar(string $indent, string $var)
353			{
354			$size = -1;
355			if (isset($this->compress->$var)) {
356			$array = $this->compress->$var;
357			if (isset($this->compress->{$var.'size'})) {
358			$size = $this->compress->{$var.'size'};
359			} elseif ($var === 'yydefault') {
360			$size = $this->context->countNonLeafStates;
361			} elseif (\in_array($var, ['yygbase', 'yygdefault'])) {
362			$size = $this->context->countNonTerminals;
363			} elseif (\in_array($var, ['yylhs', 'yylen'])) {
364			$size = $this->context->countGrams;
365			}
366			$this->printArray($array, $size < 0 ? count($array) : $size, $indent);
367			} elseif ($var === 'terminals') {
368			$nl = 0;
369			foreach ($this->context->terminals as $term) {
370			if ($this->context->cTermIndex[$term->code] >= 0) {
371			$prefix = $nl++ ? ",\n" : '';
372			$this->language->write($prefix.$indent.'"');
373			$this->language->writeQuoted($term->name);
374			$this->language->write('"');
375			}
376			}
377			$this->language->write("\n");
378			} elseif ($var === 'nonterminals') {
379			$nl = 0;
380			foreach ($this->context->nonterminals as $nonterm) {
381			$prefix = $nl++ ? ",\n" : '';
382			$this->language->write($prefix.$indent.'"');
383			$this->language->writeQuoted($nonterm->name);
384			$this->language->write('"');
385			}
386			$this->language->write("\n");
387			} else {
388			throw new TemplateException("\$listvar: unknown variable $var");
389			}
390			}
391
392			/**
393			* @param array $array
394			* @param int $limit
395			* @param string $indent
396			*/
397			protected function printArray(array $array, int $limit, string $indent)
398			{
399			$col = 0;
400			for ($i = 0; $i < $limit; $i++) {
401			if ($col === 0) {
402			$this->language->write($indent);
403			}
404			$this->language->write(\sprintf($i + 1 === $limit ? '%5d' : '%5d,', $array[$i]));
405			if (++$col === 10) {
406			$this->language->write("\n");
407			$col = 0;
408			}
409			}
410			if ($col !== 0) {
411			$this->language->write("\n");
412			}
413			}
414
415			/**
416			* @param string $var
417			*
418			* @throws TemplateException
419			*
420			* @return string
421			*/
422			protected function genValueOf(string $var): string
423			{
424			switch ($var) {
425			case 'YYSTATES':
426			return \sprintf('%d', $this->context->countStates);
427			case 'YYNLSTATES':
428			return \sprintf('%d', $this->context->countNonLeafStates);
429			case 'YYINTERRTOK':
430			return \sprintf('%d', $this->compress->yytranslate[$this->context->errorToken->value]);
431			case 'YYUNEXPECTED':
432			return \sprintf('%d', Compress::UNEXPECTED);
433			case 'YYDEFAULT':
434			return \sprintf('%d', Compress::DEFAULT);
435			case 'YYMAXLEX':
436			return \sprintf('%d', \count($this->compress->yytranslate));
437			case 'YYLAST':
438			return \sprintf('%d', \count($this->compress->yyaction));
439			case 'YYGLAST':
440			return \sprintf('%d', \count($this->compress->yygoto));
441			case 'YYTERMS':
442			case 'YYBADCH':
443			return \sprintf('%d', $this->compress->yyncterms);
444			case 'YYNONTERMS':
445			return \sprintf('%d', $this->context->countNonTerminals);
446			case 'YY2TBLSTATE':
447			return \sprintf('%d', $this->compress->yybasesize - $this->context->countNonLeafStates);
448			case 'CLASSNAME':
449			case '-p':
450			return $this->context->className ?: 'yy';
451			default:
452			throw new TemplateException("Unknown variable: \$($var)");
453			}
454			}
455
456			/**
457			* @param string $template
458			*
459			* @throws TemplateException
460			*/
461			protected function parseTemplate(string $template)
462			{
463			$template = \preg_replace("(\r\n\|\r)", "\n", $template);
464			$lines = \explode("\n", $template);
465			$this->lineNumber = 1;
466			$skip = false;
467
468			foreach ($lines as $line) {
469			$p = $line;
470			if ($skip) {
471			$this->template[] = $line;
472			continue;
473			}
474			while (\mb_strlen($p) > 0 && Utils::isWhite($p[0])) {
475			$p = \mb_substr($p, 1);
476			}
477			$this->lineNumber++;
478			if ($this->metaMatch($p, 'include')) {
479			$skip = true;
480			} elseif ($this->metaMatch($p, 'meta')) {
481			if (!isset($p[6]) \|\| Utils::isWhite($p[6])) {
482			throw new TemplateException("\$meta: missing character in definition: $p");
483			}
484			$this->metaChar = $p[6];
485			} elseif ($this->metaMatch($p, 'semval')) {
486			$this->defSemvalMacro(\mb_substr($p, 7));
487			} else {
488			$this->template[] = $line;
489			}
490			}
491			}
492
493			/**
494			* @param string $text
495			* @param string $keyword
496			*
497			* @return bool
498			*/
499			protected function metaMatch(string $text, string $keyword): bool
500			{
501			return isset($text[0]) && $text[0] === $this->metaChar && \mb_substr($text, 1, \mb_strlen($keyword)) === $keyword;
502			}
503
504			/**
505			* @param string $macro
506			*
507			* @throws TemplateException
508			*/
509			protected function defSemvalMacro(string $macro)
510			{
511			if (\mb_strpos($macro, '($)') !== false) {
512			$this->context->macros[DollarExpansion::SEMVAL_LHS_UNTYPED] = \ltrim(\mb_substr($macro, 3));
513			} elseif (\mb_strpos($macro, '($,%t)') !== false) {
514			$this->context->macros[DollarExpansion::SEMVAL_LHS_TYPED] = \ltrim(\mb_substr($macro, 6));
515			} elseif (\mb_strpos($macro, '(%n)') !== false) {
516			$this->context->macros[DollarExpansion::SEMVAL_RHS_UNTYPED] = \ltrim(\mb_substr($macro, 4));
517			} elseif (\mb_strpos($macro, '(%n,%t)') !== false) {
518			$this->context->macros[DollarExpansion::SEMVAL_RHS_TYPED] = \ltrim(\mb_substr($macro, 7));
519			} else {
520			throw new TemplateException("\$semval: bad format $macro");
521			}
522			}
523
524			/**
525			* @param int $line
526			* @param string\|null $filename
527			*/
528			protected function printLine(int $line = -1, string $filename = null)
529			{
530			$line = $line === -1 ? $this->lineNumber : $line;
531			$filename = $filename ?? $this->context->filename;
532
533			$this->language->inlineComment(\sprintf('%s:%d', $filename, $line));
534			}
535			}
536

stenin-nikita / PHP-Yacc

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Template::parseTemplate() D

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