vim-patch: 7.4.330

Problem:    Using a regexp pattern to highlight a specific position can
be slow.
Solution:   Add matchaddpos() to highlight specific positions
efficiently.
(Alexey Radkov.)

https://code.google.com/p/vim/source/detail?r=f9fa2e506b9f07549cd91074835c5c553db7b3a7

src/nvim/buffer_defs.h

@@ -880,6 +880,28 @@ typedef struct {
   proftime_T tm;        /* for a time limit */
 } match_T;
 
+/// number of positions supported by matchaddpos()
+#define MAXPOSMATCH 8
+
+/// Same as lpos_T, but with additional field len.
+typedef struct
+{
+    linenr_T    lnum;	///< line number
+    colnr_T     col;	///< column number
+    int         len;	///< length: 0 - to the end of line
+} llpos_T;
+
+/// posmatch_T provides an array for storing match items for matchaddpos()
+/// function.
+typedef struct posmatch posmatch_T;
+struct posmatch
+{
+    llpos_T     pos[MAXPOSMATCH];	///< array of positions
+    int         cur;			///< internal position counter 
+    linenr_T    toplnum;		///< top buffer line
+    linenr_T    botlnum;		///< bottom buffer line
+};
+
 /*
  * matchitem_T provides a linked list for storing match items for ":match" and
  * the match functions.
@@ -892,6 +914,7 @@ struct matchitem {
   char_u      *pattern;     /* pattern to highlight */
   int hlg_id;               /* highlight group ID */
   regmmatch_T match;        /* regexp program for pattern */
+  posmatch_T pos;           // position matches
   match_T hl;               /* struct for doing the actual highlighting */
 };