Author: jcorvel
Date: Tue May 31 23:07:54 2011
New Revision: 1129957
URL: http://svn.apache.org/viewvc?rev=1129957&view=rev
Log:
Add another knob, to make it possible to disable the prefix/suffix scanning
of the libsvn_diff processing with a simple define.
* subversion/libsvn_diff/diff_file.c
(datasources_open): Wrap the calls to find_identical_prefix and
find_identical_suffix inside an #ifndef DISABLE_PREFIX_SUFFIX_SCANNING
block.
* notes/knobs
(): Document DISABLE_PREFIX_SUFFIX_SCANNING
Modified:
subversion/trunk/notes/knobs
subversion/trunk/subversion/libsvn_diff/diff_file.c
Modified: subversion/trunk/notes/knobs
URL:
http://svn.apache.org/viewvc/subversion/trunk/notes/knobs?rev=1129957&r1=1129956&r2=1129957&view=diff
==============================================================================
--- subversion/trunk/notes/knobs (original)
+++ subversion/trunk/notes/knobs Tue May 31 23:07:54 2011
@@ -42,6 +42,7 @@ SVN_DISABLE_ENTRY_CACHE
SVN_MERGE__ALLOW_ALL_FORWARD_MERGES_FROM_SELF
SVN_USE_WIN32_CRASHHANDLER
SVN_DAV_SEND_VTXN_NAME
+DISABLE_PREFIX_SUFFIX_SCANNING
2.3 Debugging Support
@@ -185,6 +186,19 @@ SVN_I_LIKE_LATENCY_SO_IGNORE_HTTPV2
Default: not defined
Suggested: defined, not defined
+4.7 DISABLE_PREFIX_SUFFIX_SCANNING
+
+ Scope: libsvn_diff
+ Purpose: Define this symbol to disable the prefix/suffix scanning
+ of the diff processing, letting all lines be handled by the
+ full-fledged diff algorithm (with LCS algorithm). This define
+ can be useful for focusing on testing the LCS algorithm, or
+ for comparing diff performance with and without prefix/suffix
+ scanning.
+ Range: definedness
+ Default: not defined
+ Suggested: not defined
+
5 Defines controling debug support
==================================
Modified: subversion/trunk/subversion/libsvn_diff/diff_file.c
URL:
http://svn.apache.org/viewvc/subversion/trunk/subversion/libsvn_diff/diff_file.c?rev=1129957&r1=1129956&r2=1129957&view=diff
==============================================================================
--- subversion/trunk/subversion/libsvn_diff/diff_file.c (original)
+++ subversion/trunk/subversion/libsvn_diff/diff_file.c Tue May 31 23:07:54 2011
@@ -779,6 +779,8 @@ datasources_open(void *baton,
/* There will not be any identical prefix/suffix, so we're done. */
return SVN_NO_ERROR;
+#ifndef DISABLE_PREFIX_SUFFIX_SCANNING
+
SVN_ERR(find_identical_prefix(&reached_one_eof, prefix_lines,
files, datasources_len, file_baton->pool));
@@ -788,6 +790,8 @@ datasources_open(void *baton,
SVN_ERR(find_identical_suffix(suffix_lines, files, datasources_len,
file_baton->pool));
+#endif
+
/* Copy local results back to baton. */
for (i = 0; i < datasources_len; i++)
file_baton->files[datasource_to_index(datasources[i])] = files[i];
