Class used internally by Diff to actually compute the diffs.
The algorithm used here is mostly lifted from the perl module Algorithm::Diff (version 1.06) by Ned Konz, which is available at: http://www.perl.com/CPAN/authors/id/N/NE/NEDKONZ/Algorithm-Diff-1.06.zip
More ideas are taken from: http://www.ics.uci.edu/~eppstein/161/960229.html
Some ideas (and a bit of code) are from analyze.c, from GNU diffutils-2.7, which can be found at: ftp://gnudist.gnu.org/pub/gnu/diffutils/diffutils-2.7.tar.gz
closingly, some ideas (subdivision by NCHUNKS > 2, and some optimizations) are my own.
Line length limits for robustness added by Tim Starling, 2005-08-31
@author Geoffrey T. Dairiki, Tim Starling @private @subpackage DifferenceEngine
Hierarchy
- class \Drupal\Component\Diff\Engine\DiffEngine
File
- core/lib/Drupal/Component/Diff/Engine/DiffEngine.php, line 30
Namespace
Drupal\Component\Diff\Engine
Members
| Name | Modifiers | Type | Description |
|---|---|---|---|
| DiffEngine::diff | public | function | |
| DiffEngine::MAX_XREF_LENGTH | constant | ||
| DiffEngine::USE_ASSERTS | constant | ||
| DiffEngine::_compareseq | protected | function | Find LCS of two sequences. |
| DiffEngine::_diag | protected | function | Divide the Largest Common Subsequence (LCS) of the sequences [XOFF, XLIM) and [YOFF, YLIM) into NCHUNKS approximately equally sized segments. |
| DiffEngine::_lcs_pos | protected | function | |
| DiffEngine::_line_hash | protected | function | Returns the whole line if it's small enough, or the MD5 hash otherwise. |
| DiffEngine::_shift_boundaries | protected | function | Adjust inserts/deletes of identical lines to join changes as much as possible. |
Please login to continue.