vim-patch:9.1.0177: Coverity reports dead code

Problem:  Coverity reports dead code.
Solution: Remove the dead code. Also fix a mistake in ml_get_pos_len()
          and update some comments (zeertzjq).

closes: vim/vim#14189

https://github.com/vim/vim/commit/8c55d60658b7ee3458dca57fc5eec90ca9bb9bf3

4 files changed, 9 insertions, 11 deletions

diff --git a/src/nvim/fold.c b/src/nvim/fold.c
index e70a05ed9a..be3295c44c 100644
--- a/src/nvim/fold.c
+++ b/src/nvim/fold.c
@@ -518,7 +518,7 @@ static bool checkCloseRec(garray_T *gap, linenr_T lnum, int level)
   return retval;
 }
 
-// foldCreateAllowed() {{{2
+// foldManualAllowed() {{{2
 /// @return  true if it's allowed to manually create or delete a fold or,
 ///          give an error message and return false if not.
 int foldManualAllowed(bool create)
@@ -1025,7 +1025,7 @@ void foldAdjustVisual(void)
   mb_adjust_cursor();
 }
 
-// cursor_foldstart() {{{2
+// foldAdjustCursor() {{{2
 /// Move the cursor to the first line of a closed fold.
 void foldAdjustCursor(win_T *wp)
 {
diff --git a/src/nvim/memline.c b/src/nvim/memline.c
index 9fa6261987..70304f6816 100644
--- a/src/nvim/memline.c
+++ b/src/nvim/memline.c
@@ -1843,7 +1843,7 @@ colnr_T ml_get_len(linenr_T lnum)
 /// @return  length (excluding the NUL) of the text after position "pos".
 colnr_T ml_get_pos_len(pos_T *pos)
 {
-  return ml_get_buf_len(curbuf, curwin->w_cursor.lnum) - pos->col;
+  return ml_get_buf_len(curbuf, pos->lnum) - pos->col;
 }
 
 /// @return  length (excluding the NUL) of the given line in the given buffer.
diff --git a/src/nvim/ops.c b/src/nvim/ops.c
index 81b10f30a9..2decb11d25 100644
--- a/src/nvim/ops.c
+++ b/src/nvim/ops.c
@@ -1616,7 +1616,7 @@ int op_delete(oparg_T *oap)
         beginline(0);                       // cursor in column 0
       }
       truncate_line(false);         // delete the rest of the line,
-                                    // leave cursor past last char in line
+                                    // leaving cursor past last char in line
       if (oap->line_count > 1) {
         u_clearline(curbuf);  // "U" command not possible after "2cc"
       }
@@ -2232,7 +2232,6 @@ void op_insert(oparg_T *oap, int count1)
     ind_pre_col = (colnr_T)getwhitecols_curline();
     ind_pre_vcol = get_indent();
     pre_textlen = ml_get_len(oap->start.lnum) - bd.textcol;
-
     if (oap->op_type == OP_APPEND) {
       pre_textlen -= bd.textlen;
     }
@@ -4452,9 +4451,10 @@ bool do_addsub(int op_type, pos_T *pos, int length, linenr_T Prenum1)
 
   curwin->w_cursor = *pos;
   char *ptr = ml_get(pos->lnum);
+  int linelen = ml_get_len(pos->lnum);
   int col = pos->col;
 
-  if (*ptr == NUL || col + !!save_coladd >= (int)strlen(ptr)) {
+  if (col + !!save_coladd >= linelen) {
     goto theend;
   }
 
@@ -4593,9 +4593,7 @@ bool do_addsub(int op_type, pos_T *pos, int length, linenr_T Prenum1)
 
     // get the number value (unsigned)
     if (visual && VIsual_mode != 'V') {
-      maxlen = (curbuf->b_visual.vi_curswant == MAXCOL
-                ? (int)strlen(ptr) - col
-                : length);
+      maxlen = curbuf->b_visual.vi_curswant == MAXCOL ? linelen - col : length;
     }
 
     bool overflow = false;
diff --git a/src/nvim/quickfix.c b/src/nvim/quickfix.c
index a2029a6ae5..0f639bf86a 100644
--- a/src/nvim/quickfix.c
+++ b/src/nvim/quickfix.c
@@ -5362,7 +5362,7 @@ static bool vgr_match_buflines(qf_list_T *qfl, char *fname, buf_T *buf, char *sp
       }
     } else {
       char *const str = ml_get_buf(buf, lnum);
-      const int line_len = ml_get_buf_len(buf, lnum);
+      const colnr_T linelen = ml_get_buf_len(buf, lnum);
       int score;
       uint32_t matches[MAX_FUZZY_MATCHES];
       const size_t sz = sizeof(matches) / sizeof(matches[0]);
@@ -5401,7 +5401,7 @@ static bool vgr_match_buflines(qf_list_T *qfl, char *fname, buf_T *buf, char *sp
           break;
         }
         col = (colnr_T)matches[pat_len - 1] + col + 1;
-        if (col > line_len) {
+        if (col > linelen) {
           break;
         }
       }