patch 8.2.5034: there is no way to get the byte index from a virtual column
Problem: There is no way to get the byte index from a virtual column.
Solution: Add virtcol2col(). (Yegappan Lakshmanan, closes #10477,
closes #10098)
diff --git a/src/move.c b/src/move.c
index 58bd97f..5c78d6c 100644
--- a/src/move.c
+++ b/src/move.c
@@ -1322,6 +1322,39 @@
dict_add_number(dict, "curscol", ccol);
dict_add_number(dict, "endcol", ecol);
}
+
+/*
+ * "virtcol2col({winid}, {lnum}, {col})" function
+ */
+ void
+f_virtcol2col(typval_T *argvars UNUSED, typval_T *rettv)
+{
+ win_T *wp;
+ linenr_T lnum;
+ int screencol;
+ int error = FALSE;
+
+ rettv->vval.v_number = -1;
+
+ if (check_for_number_arg(argvars, 0) == FAIL
+ || check_for_number_arg(argvars, 1) == FAIL
+ || check_for_number_arg(argvars, 2) == FAIL)
+ return;
+
+ wp = find_win_by_nr_or_id(&argvars[0]);
+ if (wp == NULL)
+ return;
+
+ lnum = tv_get_number_chk(&argvars[1], &error);
+ if (error || lnum < 0 || lnum > wp->w_buffer->b_ml.ml_line_count)
+ return;
+
+ screencol = tv_get_number_chk(&argvars[2], &error);
+ if (error || screencol < 0)
+ return;
+
+ rettv->vval.v_number = vcol2col(wp, lnum, screencol);
+}
#endif
/*