API: Implement functions for deleting lines

src/api/buffer.c

@@ -67,6 +67,12 @@ void buffer_set_line(Buffer buffer, int64_t index, String line, Error *err)
   buffer_set_slice(buffer, index, index, true, true, array, err);
 }
 
+void buffer_del_line(Buffer buffer, int64_t index, Error *err)
+{
+  StringArray array = {.size = 0};
+  buffer_set_slice(buffer, index, index, true, true, array, err);
+}
+
 StringArray buffer_get_slice(Buffer buffer,
                              int64_t start,
                              int64_t end,

src/api/buffer.h

@@ -29,6 +29,13 @@ String buffer_get_line(Buffer buffer, int64_t index, Error *err);
 /// @param[out] err Details of an error that may have occurred
 void buffer_set_line(Buffer buffer, int64_t index, String line, Error *err);
 
+/// Deletes a buffer line
+///
+/// @param buffer The buffer handle
+/// @param index The line index
+/// @param[out] err Details of an error that may have occurred
+void buffer_del_line(Buffer buffer, int64_t index, Error *err);
+
 /// Retrieves a line range from the buffer
 ///
 /// @param buffer The buffer handle

src/api/vim.c

@@ -141,6 +141,11 @@ void vim_set_current_line(String line, Error *err)
   buffer_set_line(curbuf->b_fnum, curwin->w_cursor.lnum - 1, line, err);
 }
 
+void vim_del_current_line(Error *err)
+{
+  buffer_del_line(curbuf->b_fnum, curwin->w_cursor.lnum - 1, err);
+}
+
 Object vim_get_var(bool special, String name, bool pop, Error *err)
 {
   return dict_get_value(special ? &vimvardict : &globvardict, name,

src/api/vim.h

@@ -50,6 +50,11 @@ void vim_change_directory(String dir, Error *err);
 /// @return The current line string
 String vim_get_current_line(Error *err);
 
+/// Delete the current line
+///
+/// @param[out] err Details of an error that may have occurred
+void vim_del_current_line(Error *err);
+
 /// Sets the current line
 ///
 /// @param line The line contents