1 files changed, 123 insertions, 10 deletions

diff --git a/src/nvim/ex_cmds.c b/src/nvim/ex_cmds.c
index 9a847a4c0a..018a228843 100644
--- a/src/nvim/ex_cmds.c
+++ b/src/nvim/ex_cmds.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * ex_cmds.c: some functions for command line commands
  */
@@ -1487,6 +1490,11 @@ void print_line(linenr_T lnum, int use_number, int list)
 {
   int save_silent = silent_mode;
 
+  // apply :filter /pat/
+  if (message_filtered(ml_get(lnum))) {
+    return;
+  }
+
   msg_start();
   silent_mode = FALSE;
   info_message = TRUE;          /* use mch_msg(), not mch_errmsg() */
@@ -2874,8 +2882,11 @@ void ex_z(exarg_T *eap)
   if (end > curbuf->b_ml.ml_line_count)
     end = curbuf->b_ml.ml_line_count;
 
-  if (curs > curbuf->b_ml.ml_line_count)
+  if (curs > curbuf->b_ml.ml_line_count) {
     curs = curbuf->b_ml.ml_line_count;
+  } else if (curs < 1) {
+    curs = 1;
+  }
 
   for (i = start; i <= end; i++) {
     if (minus && i == lnum) {
@@ -2895,8 +2906,11 @@ void ex_z(exarg_T *eap)
     }
   }
 
-  curwin->w_cursor.lnum = curs;
-  ex_no_reprint = TRUE;
+  if (curwin->w_cursor.lnum != curs) {
+    curwin->w_cursor.lnum = curs;
+    curwin->w_cursor.col = 0;
+  }
+  ex_no_reprint = true;
 }
 
 /*
@@ -5087,14 +5101,13 @@ static void helptags_one(char_u *dir, char_u *ext, char_u *tagfname,
       }
       p1 = vim_strchr(IObuff, '*');             /* find first '*' */
       while (p1 != NULL) {
-        /* Use vim_strbyte() instead of vim_strchr() so that when
-         * 'encoding' is dbcs it still works, don't find '*' in the
-         * second byte. */
-        p2 = vim_strbyte(p1 + 1, '*');          /* find second '*' */
-        if (p2 != NULL && p2 > p1 + 1) {        /* skip "*" and "**" */
-          for (s = p1 + 1; s < p2; ++s)
-            if (*s == ' ' || *s == '\t' || *s == '|')
+        p2 = (char_u *)strchr((const char *)p1 + 1, '*');  // Find second '*'.
+        if (p2 != NULL && p2 > p1 + 1) {  // Skip "*" and "**".
+          for (s = p1 + 1; s < p2; s++) {
+            if (*s == ' ' || *s == '\t' || *s == '|') {
               break;
+            }
+          }
 
           /*
            * Only accept a *tag* when it consists of valid
@@ -6149,3 +6162,103 @@ void ex_substitute(exarg_T *eap)
   ga_clear(&save_view);
   unblock_autocmds();
 }
+
+/// Skip over the pattern argument of ":vimgrep /pat/[g][j]".
+/// Put the start of the pattern in "*s", unless "s" is NULL.
+/// If "flags" is not NULL put the flags in it: VGR_GLOBAL, VGR_NOJUMP.
+/// If "s" is not NULL terminate the pattern with a NUL.
+/// Return a pointer to the char just past the pattern plus flags.
+char_u *skip_vimgrep_pat(char_u *p, char_u **s, int *flags)
+{
+  int c;
+
+  if (vim_isIDc(*p)) {
+    // ":vimgrep pattern fname"
+    if (s != NULL) {
+      *s = p;
+    }
+    p = skiptowhite(p);
+    if (s != NULL && *p != NUL) {
+      *p++ = NUL;
+    }
+  } else {
+    // ":vimgrep /pattern/[g][j] fname"
+    if (s != NULL) {
+      *s = p + 1;
+    }
+    c = *p;
+    p = skip_regexp(p + 1, c, true, NULL);
+    if (*p != c) {
+      return NULL;
+    }
+
+    // Truncate the pattern.
+    if (s != NULL) {
+      *p = NUL;
+    }
+    p++;
+
+    // Find the flags
+    while (*p == 'g' || *p == 'j') {
+      if (flags != NULL) {
+        if (*p == 'g') {
+          *flags |= VGR_GLOBAL;
+        } else {
+          *flags |= VGR_NOJUMP;
+        }
+      }
+      p++;
+    }
+  }
+  return p;
+}
+
+/// List v:oldfiles in a nice way.
+void ex_oldfiles(exarg_T *eap)
+{
+  list_T      *l = get_vim_var_list(VV_OLDFILES);
+  listitem_T  *li;
+  long nr = 0;
+
+  if (l == NULL) {
+    msg((char_u *)_("No old files"));
+  } else {
+    msg_start();
+    msg_scroll = true;
+    for (li = l->lv_first; li != NULL && !got_int; li = li->li_next) {
+      nr++;
+      const char *fname = tv_get_string(&li->li_tv);
+      if (!message_filtered((char_u *)fname)) {
+        msg_outnum(nr);
+        MSG_PUTS(": ");
+        msg_outtrans((char_u *)tv_get_string(&li->li_tv));
+        msg_clr_eos();
+        msg_putchar('\n');
+        ui_flush();                  // output one line at a time
+        os_breakcheck();
+      }
+    }
+
+    // Assume "got_int" was set to truncate the listing.
+    got_int = false;
+
+    // File selection prompt on ":browse oldfiles"
+    if (cmdmod.browse) {
+      quit_more = false;
+      nr = prompt_for_number(false);
+      msg_starthere();
+      if (nr > 0 && nr <= l->lv_len) {
+        const char *const p = tv_list_find_str(l, nr - 1);
+        if (p == NULL) {
+          return;
+        }
+        char *const s = (char *)expand_env_save((char_u *)p);
+        eap->arg = (char_u *)s;
+        eap->cmdidx = CMD_edit;
+        cmdmod.browse = false;
+        do_exedit(eap, NULL);
+        xfree(s);
+      }
+    }
+  }
+}