www.aleph1.co.uk Git - yaffs-website/blob - vendor/sebastian/diff/src/Parser.php

   1 <?php
   2 /*
   3  * This file is part of sebastian/diff.
   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)', $string);
  26
  27         if (!empty($lines) && $lines[\count($lines) - 1] == '') {
  28             \array_pop($lines);
  29         }
  30
  31         $lineCount = \count($lines);
  32         $diffs     = array();
  33         $diff      = null;
  34         $collected = array();
  35
  36         for ($i = 0; $i < $lineCount; ++$i) {
  37             if (\preg_match('(^---\\s+(?P<file>\\S+))', $lines[$i], $fromMatch) &&
  38                 \preg_match('(^\\+\\+\\+\\s+(?P<file>\\S+))', $lines[$i + 1], $toMatch)) {
  39                 if ($diff !== null) {
  40                     $this->parseFileDiff($diff, $collected);
  41
  42                     $diffs[]   = $diff;
  43                     $collected = array();
  44                 }
  45
  46                 $diff = new Diff($fromMatch['file'], $toMatch['file']);
  47
  48                 ++$i;
  49             } else {
  50                 if (\preg_match('/^(?:diff --git |index [\da-f\.]+|[+-]{3} [ab])/', $lines[$i])) {
  51                     continue;
  52                 }
  53
  54                 $collected[] = $lines[$i];
  55             }
  56         }
  57
  58         if ($diff !== null && \count($collected)) {
  59             $this->parseFileDiff($diff, $collected);
  60
  61             $diffs[] = $diff;
  62         }
  63
  64         return $diffs;
  65     }
  66
  67     /**
  68      * @param Diff  $diff
  69      * @param array $lines
  70      */
  71     private function parseFileDiff(Diff $diff, array $lines)
  72     {
  73         $chunks = array();
  74         $chunk  = null;
  75
  76         foreach ($lines as $line) {
  77             if (\preg_match('/^@@\s+-(?P<start>\d+)(?:,\s*(?P<startrange>\d+))?\s+\+(?P<end>\d+)(?:,\s*(?P<endrange>\d+))?\s+@@/', $line, $match)) {
  78                 $chunk = new Chunk(
  79                     $match['start'],
  80                     isset($match['startrange']) ? \max(1, $match['startrange']) : 1,
  81                     $match['end'],
  82                     isset($match['endrange']) ? \max(1, $match['endrange']) : 1
  83                 );
  84
  85                 $chunks[]  = $chunk;
  86                 $diffLines = array();
  87
  88                 continue;
  89             }
  90
  91             if (\preg_match('/^(?P<type>[+ -])?(?P<line>.*)/', $line, $match)) {
  92                 $type = Line::UNCHANGED;
  93
  94                 if ($match['type'] === '+') {
  95                     $type = Line::ADDED;
  96                 } elseif ($match['type'] === '-') {
  97                     $type = Line::REMOVED;
  98                 }
  99
 100                 $diffLines[] = new Line($type, $match['line']);
 101
 102                 if (null !== $chunk) {
 103                     $chunk->setLines($diffLines);
 104                 }
 105             }
 106         }
 107
 108         $diff->setChunks($chunks);
 109     }
 110 }