vim-patch:9.1.0168: too many STRLEN() calls (#27823)

Problem:  too many STRLEN() calls
Solution: Make use of ml_get_len() calls instead
          (John Marriott)

closes: vim/vim#14123

https://github.com/vim/vim/commit/bfcc895482c717c9f6d86890d789ec739c3016b4

Co-authored-by: John Marriott <basilisk@internode.on.net>

4 files changed, 20 insertions, 21 deletions

diff --git a/src/nvim/change.c b/src/nvim/change.c
index 3d06c6956e..8b1e7587de 100644
--- a/src/nvim/change.c
+++ b/src/nvim/change.c
@@ -714,7 +714,7 @@ void ins_char_bytes(char *buf, size_t charlen)
   size_t col = (size_t)curwin->w_cursor.col;
   linenr_T lnum = curwin->w_cursor.lnum;
   char *oldp = ml_get(lnum);
-  size_t linelen = strlen(oldp) + 1;  // length of old line including NUL
+  size_t linelen = (size_t)ml_get_len(lnum) + 1;  // length of old line including NUL
 
   // The lengths default to the values for when not replacing.
   size_t oldlen = 0;        // nr of bytes inserted
@@ -821,7 +821,7 @@ void ins_str(char *s)
 
   colnr_T col = curwin->w_cursor.col;
   char *oldp = ml_get(lnum);
-  int oldlen = (int)strlen(oldp);
+  int oldlen = ml_get_len(lnum);
 
   char *newp = xmalloc((size_t)oldlen + (size_t)newlen + 1);
   if (col > 0) {
@@ -879,7 +879,7 @@ int del_bytes(colnr_T count, bool fixpos_arg, bool use_delcombine)
   colnr_T col = curwin->w_cursor.col;
   bool fixpos = fixpos_arg;
   char *oldp = ml_get(lnum);
-  colnr_T oldlen = (colnr_T)strlen(oldp);
+  colnr_T oldlen = ml_get_len(lnum);
 
   // Can't do anything when the cursor is on the NUL after the line.
   if (col >= oldlen) {
@@ -1117,7 +1117,7 @@ bool open_line(int dir, int flags, int second_line_indent, bool *did_do_comment)
   colnr_T mincol = curwin->w_cursor.col + 1;
 
   // make a copy of the current line so we can mess with it
-  char *saved_line = xstrdup(get_cursor_line_ptr());
+  char *saved_line = xstrnsave(get_cursor_line_ptr(), (size_t)get_cursor_line_len());
 
   if (State & VREPLACE_FLAG) {
     // With MODE_VREPLACE we make a copy of the next line, which we will be
@@ -1128,7 +1128,8 @@ bool open_line(int dir, int flags, int second_line_indent, bool *did_do_comment)
     // the line, replacing what was there before and pushing the right
     // stuff onto the replace stack.  -- webb.
     if (curwin->w_cursor.lnum < orig_line_count) {
-      next_line = xstrdup(ml_get(curwin->w_cursor.lnum + 1));
+      next_line = xstrnsave(ml_get(curwin->w_cursor.lnum + 1),
+                            (size_t)ml_get_len(curwin->w_cursor.lnum + 1));
     } else {
       next_line = xstrdup("");
     }
@@ -1908,7 +1909,7 @@ bool open_line(int dir, int flags, int second_line_indent, bool *did_do_comment)
   // stuff onto the replace stack (via ins_char()).
   if (State & VREPLACE_FLAG) {
     // Put new line in p_extra
-    p_extra = xstrdup(get_cursor_line_ptr());
+    p_extra = xstrnsave(get_cursor_line_ptr(), (size_t)get_cursor_line_len());
 
     // Put back original line
     ml_replace(curwin->w_cursor.lnum, next_line, false);
@@ -1939,7 +1940,7 @@ void truncate_line(int fixpos)
   colnr_T col = curwin->w_cursor.col;
   char *old_line = ml_get(lnum);
   char *newp = col == 0 ? xstrdup("") : xstrnsave(old_line, (size_t)col);
-  int deleted = (int)strlen(old_line) - col;
+  int deleted = ml_get_len(lnum) - col;
 
   ml_replace(lnum, newp, false);
 
diff --git a/src/nvim/edit.c b/src/nvim/edit.c
index 54deb0f1c3..a0d6f7125e 100644
--- a/src/nvim/edit.c
+++ b/src/nvim/edit.c
@@ -4331,7 +4331,7 @@ static bool ins_tab(void)
     if (State & VREPLACE_FLAG) {
       pos = curwin->w_cursor;
       cursor = &pos;
-      saved_line = xstrdup(get_cursor_line_ptr());
+      saved_line = xstrnsave(get_cursor_line_ptr(), (size_t)get_cursor_line_len());
       ptr = saved_line + pos.col;
     } else {
       ptr = get_cursor_pos_ptr();
diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index 3d224bfa0f..e4ee254193 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -6699,7 +6699,7 @@ pos_T *var2fpos(const typval_T *const tv, const bool dollar_lnum, int *const ret
     if (charcol) {
       len = mb_charlen(ml_get(pos.lnum));
     } else {
-      len = (int)strlen(ml_get(pos.lnum));
+      len = ml_get_len(pos.lnum);
     }
 
     // We accept "$" for the column number: last column.
@@ -6789,7 +6789,7 @@ pos_T *var2fpos(const typval_T *const tv, const bool dollar_lnum, int *const ret
       if (charcol) {
         pos.col = (colnr_T)mb_charlen(get_cursor_line_ptr());
       } else {
-        pos.col = (colnr_T)strlen(get_cursor_line_ptr());
+        pos.col = get_cursor_line_len();
       }
     }
     return &pos;
diff --git a/src/nvim/eval/funcs.c b/src/nvim/eval/funcs.c
index ab92aa7b34..1d5835c9bf 100644
--- a/src/nvim/eval/funcs.c
+++ b/src/nvim/eval/funcs.c
@@ -738,7 +738,7 @@ static void get_col(typval_T *argvars, typval_T *rettv, bool charcol)
     if (fp->col == MAXCOL) {
       // '> can be MAXCOL, get the length of the line then
       if (fp->lnum <= curbuf->b_ml.ml_line_count) {
-        col = (colnr_T)strlen(ml_get(fp->lnum)) + 1;
+        col = ml_get_len(fp->lnum) + 1;
       } else {
         col = MAXCOL;
       }
@@ -8688,7 +8688,7 @@ static void f_synID(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
 
   int id = 0;
   if (!transerr && lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
-      && col >= 0 && (size_t)col < strlen(ml_get(lnum))) {
+      && col >= 0 && col < ml_get_len(lnum)) {
     id = syn_get_id(curwin, lnum, col, trans, NULL, false);
   }
 
@@ -8811,8 +8811,8 @@ static void f_synconcealed(typval_T *argvars, typval_T *rettv, EvalFuncData fptr
 
   CLEAR_FIELD(str);
 
-  if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count && col >= 0
-      && (size_t)col <= strlen(ml_get(lnum)) && curwin->w_p_cole > 0) {
+  if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
+      && col >= 0 && col <= ml_get_len(lnum) && curwin->w_p_cole > 0) {
     syn_get_id(curwin, lnum, col, false, NULL, false);
     syntax_flags = get_syntax_info(&matchid);
 
@@ -8845,10 +8845,8 @@ static void f_synstack(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
   const linenr_T lnum = tv_get_lnum(argvars);
   const colnr_T col = (colnr_T)tv_get_number(&argvars[1]) - 1;
 
-  if (lnum >= 1
-      && lnum <= curbuf->b_ml.ml_line_count
-      && col >= 0
-      && (size_t)col <= strlen(ml_get(lnum))) {
+  if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
+      && col >= 0 && col <= ml_get_len(lnum)) {
     tv_list_alloc_ret(rettv, kListLenMayKnow);
     syn_get_id(curwin, lnum, col, false, NULL, true);
 
@@ -9218,9 +9216,9 @@ static void f_virtcol(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
     if (fp->col < 0) {
       fp->col = 0;
     } else {
-      const size_t len = strlen(ml_get(fp->lnum));
-      if (fp->col > (colnr_T)len) {
-        fp->col = (colnr_T)len;
+      const colnr_T len = ml_get_len(fp->lnum);
+      if (fp->col > len) {
+        fp->col = len;
       }
     }
     getvvcol(curwin, fp, &vcol_start, NULL, &vcol_end);