13f82230e99ae409f1128dd1d4a668af3110379e
tdreszer
  Mon Apr 18 14:12:51 2011 -0700
Streamlined and optimized continuation line code as Jim's suggests this is critical path.
diff --git src/hg/lib/trackDbCustom.c src/hg/lib/trackDbCustom.c
index b6ae4d6..5d94dc1 100644
--- src/hg/lib/trackDbCustom.c
+++ src/hg/lib/trackDbCustom.c
@@ -273,61 +273,61 @@
  * non-NULL then only load tracks that mesh with release. */
 {
 char *raFile = lf->fileName;
 char *line, *word;
 struct trackDb *btList = NULL, *bt;
 boolean done = FALSE;
 char *incFile;
 
 for (;;)
     {
     /* Seek to next line that starts with 'track' */
     for (;;)
 	{
         char *subRelease;
 
-	if (!lineFileNextFull(lf, &line, NULL)) // NOTE: lineFileNextFull joins continuation lines
-	   {
+	if (!lineFileNextFull(lf, &line, NULL, NULL, NULL))
+            { // NOTE: lineFileNextFull joins continuation lines
 	   done = TRUE;
 	   break;
 	   }
 	line = skipLeadingSpaces(line);
         if (startsWithWord("track", line))
             {
-            lineFileReuseFull(lf); // NOTE: lineFileReuseFull only works with previous lineFileNextFull call
+            lineFileReuseFull(lf); // NOTE: only works with previous lineFileNextFull call
             break;
             }
         else if ((incFile = trackDbInclude(raFile, line, &subRelease)) != NULL)
             {
             if (subRelease)
                 trackDbCheckValidRelease(subRelease);
             if (releaseTag && subRelease && !sameString(subRelease, releaseTag))
                 errAbort("Include with release %s inside include with release %s line %d of %s", subRelease, releaseTag, lf->lineIx, lf->fileName);
             struct trackDb *incTdb = trackDbFromRa(incFile, subRelease);
             btList = slCat(btList, incTdb);
             }
 	}
     if (done)
         break;
 
     /* Allocate track structure and fill it in until next blank line. */
     bt = trackDbNew();
     slAddHead(&btList, bt);
     for (;;)
         {
         /* Break at blank line or EOF. */
-        if (!lineFileNextFull(lf, &line, NULL))  // NOTE: lineFileNextFull joins continuation lines
+        if (!lineFileNextFull(lf, &line, NULL, NULL, NULL))  // NOTE: joins continuation lines
             break;
         line = skipLeadingSpaces(line);
         if (line == NULL || line[0] == 0)
             break;
 
         /* Skip comments. */
         if (line[0] == '#')
             continue;
 
         /* Parse out first word and decide what to do. */
         word = nextWord(&line);
         if (line == NULL)
             errAbort("No value for %s line %d of %s", word, lf->lineIx, lf->fileName);
         line = trimSpaces(line);
         trackDbUpdateOldTag(&word, &line);