111 lines
2.9 KiB
PHP
111 lines
2.9 KiB
PHP
<?php
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/*
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* This file is part of sebastian/diff.
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*
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* (c) Sebastian Bergmann <sebastian@phpunit.de>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace SebastianBergmann\Diff;
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/**
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* Unified diff parser.
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*/
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class Parser
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{
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/**
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* @param string $string
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*
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* @return Diff[]
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*/
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public function parse($string)
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{
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$lines = \preg_split('(\r\n|\r|\n)', $string);
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if (!empty($lines) && $lines[\count($lines) - 1] == '') {
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\array_pop($lines);
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}
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$lineCount = \count($lines);
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$diffs = array();
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$diff = null;
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$collected = array();
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for ($i = 0; $i < $lineCount; ++$i) {
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if (\preg_match('(^---\\s+(?P<file>\\S+))', $lines[$i], $fromMatch) &&
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\preg_match('(^\\+\\+\\+\\s+(?P<file>\\S+))', $lines[$i + 1], $toMatch)) {
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if ($diff !== null) {
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$this->parseFileDiff($diff, $collected);
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$diffs[] = $diff;
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$collected = array();
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}
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$diff = new Diff($fromMatch['file'], $toMatch['file']);
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++$i;
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} else {
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if (\preg_match('/^(?:diff --git |index [\da-f\.]+|[+-]{3} [ab])/', $lines[$i])) {
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continue;
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}
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$collected[] = $lines[$i];
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}
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}
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if ($diff !== null && \count($collected)) {
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$this->parseFileDiff($diff, $collected);
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$diffs[] = $diff;
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}
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return $diffs;
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}
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/**
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* @param Diff $diff
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* @param array $lines
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*/
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private function parseFileDiff(Diff $diff, array $lines)
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{
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$chunks = array();
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$chunk = null;
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foreach ($lines as $line) {
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if (\preg_match('/^@@\s+-(?P<start>\d+)(?:,\s*(?P<startrange>\d+))?\s+\+(?P<end>\d+)(?:,\s*(?P<endrange>\d+))?\s+@@/', $line, $match)) {
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$chunk = new Chunk(
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$match['start'],
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isset($match['startrange']) ? \max(1, $match['startrange']) : 1,
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$match['end'],
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isset($match['endrange']) ? \max(1, $match['endrange']) : 1
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);
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$chunks[] = $chunk;
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$diffLines = array();
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continue;
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}
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if (\preg_match('/^(?P<type>[+ -])?(?P<line>.*)/', $line, $match)) {
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$type = Line::UNCHANGED;
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if ($match['type'] === '+') {
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$type = Line::ADDED;
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} elseif ($match['type'] === '-') {
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$type = Line::REMOVED;
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}
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$diffLines[] = new Line($type, $match['line']);
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if (null !== $chunk) {
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$chunk->setLines($diffLines);
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}
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}
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}
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$diff->setChunks($chunks);
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}
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}
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