vim-patch:7.4.582 #2653

Problem:    Can't match "%>80v" properly. (Axel Bender)
Solution:   Correctly handle ">". (Christian Brabandt)

https://github.com/vim/vim/commit/v7-4-582

See https://groups.google.com/d/msg/vim_dev/n-02i4FnOcw/P3Yyx1OLeXgJ

Slightly adapted due to the long_u refactoring in
2ceb1c74d5.

Reviewed-by: Florian Walch <florian@fwalch.com>

Fixes #2726

src/nvim/regexp_nfa.c

@@ -5742,17 +5742,27 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm
 
           // Bail out quickly when there can't be a match, avoid the overhead of
           // win_linetabsize() on long lines.
-          if ((col > t->state->val && op != 1)
-              || (col - 1 > t->state->val && op == 1)) {
+          if (op != 1 && col > t->state->val) {
             break;
           }
-          uintmax_t lts = win_linetabsize(reg_win == NULL ? curwin : reg_win,
-                                          regline,
-                                          col);
+
+          result = FALSE;
+          win_T *wp = reg_win == NULL ? curwin : reg_win;
+          if (op == 1 && col - 1 > t->state->val && col > 100) {
+            long ts = wp->w_buffer->b_p_ts;
+
+            // Guess that a character won't use more columns than 'tabstop',
+            // with a minimum of 4.
+            if (ts < 4) {
+              ts = 4;
+            }
+            result = col > t->state->val * ts;
+          }
+          if (!result) {
+            uintmax_t lts = win_linetabsize(wp, regline, col);
             assert(t->state->val >= 0);
-          result = nfa_re_num_cmp((uintmax_t)t->state->val,
-                                  op,
-                                  lts + 1);
+            result = nfa_re_num_cmp((uintmax_t)t->state->val, op, lts + 1);
+          }
           if (result) {
             add_here = true;
             add_state = t->state->out;

src/nvim/testdir/test64.in

@@ -7,6 +7,7 @@ actually tried.
 STARTTEST
 :so small.vim
 :" tl is a List of Lists with:
+:"    regexp engine
 :"    regexp pattern
 :"    text to test the pattern on
 :"    expected match (optional)
@@ -451,6 +452,9 @@ STARTTEST
 :"""" Skip adding state twice
 :call add(tl, [2, '^\%(\%(^\s*#\s*if\>\|#\s*if\)\)\(\%>1c.*$\)\@=', "#if FOO", "#if", ' FOO'])
 :"
+:""" Test \%V atom
+:call add(tl, [2, '\%>70vGesamt', 'Jean-Michel Charlier & Victor Hubinon\Gesamtausgabe [Salleck]    Buck Danny {Jean-Michel Charlier & Victor Hubinon}\Gesamtausgabe', 'Gesamt'])
+:"
 :"""" Run the tests
 :"
 :for t in tl

src/nvim/testdir/test64.ok

@@ -1030,6 +1030,9 @@ OK 2 - [0-9a-zA-Z]\{8}-\([0-9a-zA-Z]\{4}-\)\{3}[0-9a-zA-Z]\{12}
 OK 0 - ^\%(\%(^\s*#\s*if\>\|#\s*if\)\)\(\%>1c.*$\)\@=
 OK 1 - ^\%(\%(^\s*#\s*if\>\|#\s*if\)\)\(\%>1c.*$\)\@=
 OK 2 - ^\%(\%(^\s*#\s*if\>\|#\s*if\)\)\(\%>1c.*$\)\@=
+OK 0 - \%>70vGesamt
+OK 1 - \%>70vGesamt
+OK 2 - \%>70vGesamt
 multi-line tests
 OK 0 - ^.\(.\).\_..\1.
 OK 1 - ^.\(.\).\_..\1.

src/nvim/version.c

@@ -218,7 +218,7 @@ static int included_patches[] = {
   585,
   //584 NA
   //583 NA
-  //582,
+  582,
   //581 NA
   580,
   579,