Using a temp file from emacs C code

[Cecilio Pardo <cpardo@imayhem.com>]

Hello,

How should I create and use a temp file from emacs' C code?

I got this working but it doesn't look right:

- Call lisp function make-temp-file, trough funcall
- Convert the returned string to utf-16 (because of Windows)
- Then to read the file use emacs_fopen
- Call lisp function delete-file (funcall)

   const char *prefix = "prefix";
   Lisp_Object tmp_file =
     CALLN (Ffuncall,
	   intern_c_string ("make-temp-file"),
	   make_string (prefix, strlen (prefix)),
	   Qnil, Qnil, Qnil);
   tmp_file = ENCODE_FILE (tmp_file);
   WCHAR wide_filename[MAX_PATH];
   filename_to_utf16 (SDATA (tmp_file), wide_filename);

   // write things to the file..., then read back:
	
   FILE *fp = emacs_fopen (SDATA (tmp_file), "rb");
   if (fp != NULL)
     {
       // ...
       fclose (fp);
     }

   CALLN (Ffuncall, intern_c_string("delete-file"), tmp_file, Qnil);



Thanks.