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+To: vim_dev@googlegroups.com
+Subject: Patch 7.3.636
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 7.3.636 (after 7.3.625)
+Problem: Not all zero-width matches handled correctly for "gn".
+Solution: Move zero-width detection to a separate function. (Christian
+ Brabandt)
+Files: src/search.c
+
+
+*** ../vim-7.3.635/src/search.c 2012-08-08 15:27:54.000000000 +0200
+--- src/search.c 2012-08-23 15:52:50.000000000 +0200
+***************
+*** 4526,4531 ****
+--- 4526,4533 ----
+ #endif /* FEAT_TEXTOBJ */
+
+ #if defined(FEAT_VISUAL) || defined(PROTO)
++ static int is_zerowidth __ARGS((char_u *pattern));
++
+ /*
+ * Find next search match under cursor, cursor at end.
+ * Used while an operator is pending, and in Visual mode.
+***************
+*** 4546,4556 ****
+ int visual_active = FALSE;
+ int flags = 0;
+ pos_T save_VIsual;
+- regmmatch_T regmatch;
+- int nmatched = 0;
+ int zerowidth = FALSE;
+
+-
+ /* wrapping should not occur */
+ p_ws = FALSE;
+
+--- 4548,4555 ----
+***************
+*** 4583,4606 ****
+ else
+ orig_pos = pos = start_pos = curwin->w_cursor;
+
+! /*
+! * Check for zero-width pattern.
+! */
+! if (search_regcomp(spats[last_idx].pat, RE_SEARCH, RE_SEARCH,
+! ((SEARCH_HIS + SEARCH_KEEP)), &regmatch) == FAIL)
+ return FAIL;
+
+- /* Zero-width pattern should match somewhere, then we can check if start
+- * and end are in the same position. */
+- nmatched = vim_regexec_multi(&regmatch, curwin, curbuf,
+- curwin->w_cursor.lnum, (colnr_T)0, NULL);
+- if (called_emsg)
+- return FAIL;
+- if (nmatched && regmatch.startpos[0].lnum == regmatch.endpos[0].lnum
+- && regmatch.endpos[0].col == regmatch.startpos[0].col)
+- zerowidth = TRUE;
+- vim_free(regmatch.regprog);
+-
+ /*
+ * The trick is to first search backwards and then search forward again,
+ * so that a match at the current cursor position will be correctly
+--- 4582,4592 ----
+ else
+ orig_pos = pos = start_pos = curwin->w_cursor;
+
+! /* Is the pattern is zero-width? */
+! zerowidth = is_zerowidth(spats[last_idx].pat);
+! if (zerowidth == -1)
+ return FAIL;
+
+ /*
+ * The trick is to first search backwards and then search forward again,
+ * so that a match at the current cursor position will be correctly
+***************
+*** 4693,4698 ****
+--- 4679,4721 ----
+
+ return OK;
+ }
++
++ /*
++ * Check if the pattern is zero-width.
++ * Returns TRUE, FALSE or -1 for failure.
++ */
++ static int
++ is_zerowidth(pattern)
++ char_u *pattern;
++ {
++ regmmatch_T regmatch;
++ int nmatched = 0;
++ int result = -1;
++ pos_T pos;
++
++ if (search_regcomp(pattern, RE_SEARCH, RE_SEARCH,
++ SEARCH_KEEP, &regmatch) == FAIL)
++ return -1;
++
++ /* move to match */
++ clearpos(&pos);
++ if (searchit(curwin, curbuf, &pos, FORWARD, spats[last_idx].pat, 1,
++ SEARCH_KEEP, RE_SEARCH, 0, NULL) != FAIL)
++ {
++ /* Zero-width pattern should match somewhere, then we can check if
++ * start and end are in the same position. */
++ nmatched = vim_regexec_multi(&regmatch, curwin, curbuf,
++ pos.lnum, (colnr_T)0, NULL);
++
++ if (!called_emsg)
++ result = (nmatched != 0
++ && regmatch.startpos[0].lnum == regmatch.endpos[0].lnum
++ && regmatch.startpos[0].col == regmatch.endpos[0].col);
++ }
++
++ vim_free(regmatch.regprog);
++ return result;
++ }
+ #endif /* FEAT_VISUAL */
+
+ #if defined(FEAT_LISP) || defined(FEAT_CINDENT) || defined(FEAT_TEXTOBJ) \
+*** ../vim-7.3.635/src/version.c 2012-08-23 13:28:50.000000000 +0200
+--- src/version.c 2012-08-23 15:25:23.000000000 +0200
+***************
+*** 721,722 ****
+--- 721,724 ----
+ { /* Add new patch number below this line */
++ /**/
++ 636,
+ /**/
+
+--
+Edison's greatest achievement came in 1879, when he invented the
+electric company. Edison's design was a brilliant adaptation of the
+simple electrical circuit: the electric company sends electricity
+through a wire to a customer, then immediately gets the electricity
+back through another wire
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net \\\
+/// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\ an exciting new programming language -- http://www.Zimbu.org ///
+ \\\ help me help AIDS victims -- http://ICCF-Holland.org ///