Cancel the change done in HEAD on 2004-11-30.

(coding_charset_list): New function.

src/coding.c

@@ -5085,6 +5085,30 @@ setup_coding_system (coding_system, coding)
   return;
 }
 
+/* Return a list of charsets supported by CODING.  */
+
+Lisp_Object
+coding_charset_list (coding)
+     struct coding_system *coding;
+{
+  Lisp_Object attrs, charset_list, coding_type;
+
+  CODING_GET_INFO (coding, attrs, charset_list);
+  if (EQ (CODING_ATTR_TYPE (attrs), Qiso_2022))
+    {
+      int flags = XINT (AREF (attrs, coding_attr_iso_flags));
+
+      if (flags & CODING_ISO_FLAG_FULL_SUPPORT)
+	charset_list = Viso_2022_charset_list;
+    }
+  else if (EQ (CODING_ATTR_TYPE (attrs), Qemacs_mule))
+    {
+      charset_list = Vemacs_mule_charset_list;
+    }
+  return charset_list;
+}
+
+
 /* Return raw-text or one of its subsidiaries that has the same
    eol_type as CODING-SYSTEM.  */
 
@@ -6578,37 +6602,6 @@ code_conversion_restore (arg)
   return Qnil;
 }
 
-/* Name (or base name) of work buffer for code conversion.  */
-static Lisp_Object Vcode_conversion_workbuf_name;
-
-/* Set the current buffer to the working buffer prepared for
-   code-conversion.  MULTIBYTE specifies the multibyteness of the
-   buffer.  */
-
-static struct buffer *
-set_conversion_work_buffer (multibyte)
-     int multibyte;
-{
-  Lisp_Object buffer;
-  struct buffer *buf;
-
-  buffer = Fget_buffer_create (Vcode_conversion_workbuf_name);
-  buf = XBUFFER (buffer);
-  delete_all_overlays (buf);
-  buf->directory = current_buffer->directory;
-  buf->read_only = Qnil;
-  buf->filename = Qnil;
-  buf->undo_list = Qt;
-  eassert (buf->overlays_before == NULL);
-  eassert (buf->overlays_after == NULL);
-  set_buffer_internal (buf);
-  if (BEG != BEGV || Z != ZV)
-    Fwiden ();
-  del_range_2 (BEG, BEG_BYTE, Z, Z_BYTE, 0);
-  buf->enable_multibyte_characters = multibyte ? Qt : Qnil;
-  return buf;
-}
-
 Lisp_Object
 code_conversion_save (with_work_buf, multibyte)
      int with_work_buf, multibyte;
@@ -7026,64 +7019,6 @@ encode_coding_object (coding, src_object, from, from_byte, to, to_byte,
 }
 
 
-
-/* Run pre-write-conversion function of CODING on NCHARS/NBYTES
-   text in *STR.  *SIZE is the allocated bytes for STR.  As it
-   is intended that this function is called from encode_terminal_code,
-   the pre-write-conversion function is run by safe_call and thus
-   "Error during redisplay: ..." is logged when an error occurs.
-
-   Store the resulting text in *STR and set CODING->produced_char and
-   CODING->produced to the number of characters and bytes
-   respectively.  If the size of *STR is too small, enlarge it by
-   xrealloc and update *STR and *SIZE.  */
-
-void
-run_pre_write_conversin_on_c_str (str, size, nchars, nbytes, coding)
-     unsigned char **str;
-     int *size, nchars, nbytes;
-     struct coding_system *coding;
-{
-  struct gcpro gcpro1, gcpro2;
-  struct buffer *cur = current_buffer;
-  Lisp_Object old_deactivate_mark, old_last_coding_system_used;
-  Lisp_Object args[3];
-
-  /* It is not crucial to specbind this.  */
-  old_deactivate_mark = Vdeactivate_mark;
-  old_last_coding_system_used = Vlast_coding_system_used;
-  GCPRO2 (old_deactivate_mark, old_last_coding_system_used);
-
-  /* We must insert the contents of STR as is without
-     unibyte<->multibyte conversion.  For that, we adjust the
-     multibyteness of the working buffer to that of STR.  */
-  set_conversion_work_buffer (coding->src_multibyte);
-  insert_1_both (*str, nchars, nbytes, 0, 0, 0);
-  UNGCPRO;
-  inhibit_pre_post_conversion = 1;
-  args[0] = coding->pre_write_conversion;
-  args[1] = make_number (BEG);
-  args[2] = make_number (Z);
-  safe_call (3, args);
-  inhibit_pre_post_conversion = 0;
-  Vdeactivate_mark = old_deactivate_mark;
-  Vlast_coding_system_used = old_last_coding_system_used;
-  coding->produced_char = Z - BEG;
-  coding->produced = Z_BYTE - BEG_BYTE;
-  if (coding->produced > *size)
-    {
-      *size = coding->produced;
-      *str = xrealloc (*str, *size);
-    }
-  if (BEG < GPT && GPT < Z)
-    move_gap (BEG);
-  bcopy (BEG_ADDR, *str, coding->produced);
-  coding->src_multibyte
-    = ! NILP (current_buffer->enable_multibyte_characters);
-  set_buffer_internal (cur);
-}
-
-
 Lisp_Object
 preferred_coding_system ()
 {