yaffs.net Git - yaffs-website/blob - vendor/sebastian/diff/src/Parser.php

   1 <?php
   2 /*
   3  * This file is part of the Diff package.
   4  *
   5  * (c) Sebastian Bergmann <sebastian@phpunit.de>
   6  *
   7  * For the full copyright and license information, please view the LICENSE
   8  * file that was distributed with this source code.
   9  */
  10
  11 namespace SebastianBergmann\Diff;
  12
  13 /**
  14  * Unified diff parser.
  15  */
  16 class Parser
  17 {
  18     /**
  19      * @param string $string
  20      *
  21      * @return Diff[]
  22      */
  23     public function parse($string)
  24     {
  25         $lines     = preg_split('(\r\n|\r|\n)', $string);
  26         $lineCount = count($lines);
  27         $diffs     = array();
  28         $diff      = null;
  29         $collected = array();
  30
  31         for ($i = 0; $i < $lineCount; ++$i) {
  32             if (preg_match('(^---\\s+(?P<file>\\S+))', $lines[$i], $fromMatch) &&
  33                 preg_match('(^\\+\\+\\+\\s+(?P<file>\\S+))', $lines[$i + 1], $toMatch)) {
  34                 if ($diff !== null) {
  35                     $this->parseFileDiff($diff, $collected);
  36                     $diffs[]   = $diff;
  37                     $collected = array();
  38                 }
  39
  40                 $diff = new Diff($fromMatch['file'], $toMatch['file']);
  41                 ++$i;
  42             } else {
  43                 if (preg_match('/^(?:diff --git |index [\da-f\.]+|[+-]{3} [ab])/', $lines[$i])) {
  44                     continue;
  45                 }
  46                 $collected[] = $lines[$i];
  47             }
  48         }
  49
  50         if (count($collected) && ($diff !== null)) {
  51             $this->parseFileDiff($diff, $collected);
  52             $diffs[] = $diff;
  53         }
  54
  55         return $diffs;
  56     }
  57
  58     /**
  59      * @param Diff  $diff
  60      * @param array $lines
  61      */
  62     private function parseFileDiff(Diff $diff, array $lines)
  63     {
  64         $chunks = array();
  65
  66         foreach ($lines as $line) {
  67             if (preg_match('/^@@\s+-(?P<start>\d+)(?:,\s*(?P<startrange>\d+))?\s+\+(?P<end>\d+)(?:,\s*(?P<endrange>\d+))?\s+@@/', $line, $match)) {
  68                 $chunk = new Chunk(
  69                     $match['start'],
  70                     isset($match['startrange']) ? max(1, $match['startrange']) : 1,
  71                     $match['end'],
  72                     isset($match['endrange']) ? max(1, $match['endrange']) : 1
  73                 );
  74
  75                 $chunks[]  = $chunk;
  76                 $diffLines = array();
  77                 continue;
  78             }
  79
  80             if (preg_match('/^(?P<type>[+ -])?(?P<line>.*)/', $line, $match)) {
  81                 $type = Line::UNCHANGED;
  82
  83                 if ($match['type'] == '+') {
  84                     $type = Line::ADDED;
  85                 } elseif ($match['type'] == '-') {
  86                     $type = Line::REMOVED;
  87                 }
  88
  89                 $diffLines[] = new Line($type, $match['line']);
  90
  91                 if (isset($chunk)) {
  92                     $chunk->setLines($diffLines);
  93                 }
  94             }
  95         }
  96
  97         $diff->setChunks($chunks);
  98     }
  99 }