On 04.03.2012 11:32, Daniel Shahaf wrote:
stef...@apache.org wrote on Sat, Mar 03, 2012 at 14:27:51 -0000:
Author: stefan2
Date: Sat Mar  3 14:27:51 2012
New Revision: 1296628

URL: http://svn.apache.org/viewvc?rev=1296628&view=rev
Log:
Make svn ls faster and more streamy on svn://

* subversion/svnserve/serve.c
   (get_dir): don't collect entries but send them immediately

Modified:
     subversion/trunk/subversion/svnserve/serve.c

Modified: subversion/trunk/subversion/svnserve/serve.c
URL: 
http://svn.apache.org/viewvc/subversion/trunk/subversion/svnserve/serve.c?rev=1296628&r1=1296627&r2=1296628&view=diff
==============================================================================
--- subversion/trunk/subversion/svnserve/serve.c (original)
+++ subversion/trunk/subversion/svnserve/serve.c Sat Mar  3 14:27:51 2012
@@ -1470,7 +1470,7 @@ static svn_error_t *get_dir(svn_ra_svn_c
                              apr_array_header_t *params, void *baton)
  {
    server_baton_t *b = baton;
-  const char *path, *full_path, *file_path, *cauthor, *cdate;
+  const char *path, *full_path, *file_path, *cdate;
    svn_revnum_t rev;
    apr_hash_t *entries, *props = NULL, *file_props;
    apr_hash_index_t *hi;
@@ -1540,9 +1540,15 @@ static svn_error_t *get_dir(svn_ra_svn_c
    if (want_props)
      SVN_CMD_ERR(get_props(&props, root, full_path, pool));

-  /* Fetch the directory entries if requested. */
+  /* Begin response ... */
+  SVN_ERR(svn_ra_svn_write_tuple(conn, pool, "w(r(!", "success", rev));
+  SVN_ERR(svn_ra_svn_write_proplist(conn, pool, props));
+  SVN_ERR(svn_ra_svn_write_tuple(conn, pool, "!)(!"));
+
+  /* Fetch the directory entries if requested and send them immediately. */
    if (want_contents)
      {
+      const char *zero_date = svn_time_to_cstring(0, pool);
        SVN_CMD_ERR(svn_fs_dir_entries(&entries, root, full_path, pool));

        /* Transform the hash table's FS entries into dirents.  This probably
@@ -1552,91 +1558,62 @@ static svn_error_t *get_dir(svn_ra_svn_c
          {
            const char *name = svn__apr_hash_index_key(hi);
            svn_fs_dirent_t *fsent = svn__apr_hash_index_val(hi);
-          svn_dirent_t *entry;
+
+          svn_dirent_t entry;
+          memset(&entry, 0, sizeof(entry));
The old code allocated the struct on the heap, and you do so on the
stack.  But the struct has a _dup() function.

Could the size of the struct change in future versions?  If so,
shouldn't we add a constructor function for it (and use it here)?

We don't get the entry from any function call
nor do we pass it to some function. It is simply
a structured chunk of memory that we use
instead of a bunch of independent variables.

IOW, even if the definition of that struct changed
dramatically in other places, this function will
always work once it got compiled -- even if
other libs use incompatible definitions.

-- Stefan^2.

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