*** empty log message ***

[gnu-emacs] / src / coding.h

diff --git a/src/coding.h b/src/coding.h
index 9ace4d1e074c96001c953b0527d5fd02202a857e..b4e2668622992d6bfec36c8db0f41490e0f9e137 100644 (file)
--- a/src/coding.h
+++ b/src/coding.h
@@ -1,7 +1,8 @@
 /* Header for coding system handler.
-   Copyright (C) 2002, 2003, 2004, 2005,
-                 2006 Free Software Foundation, Inc.
-   Copyright (C) 1995, 1997, 1998, 2000
+   Copyright (C) 2001, 2002, 2003, 2004, 2005,
+                 2006, 2007  Free Software Foundation, Inc.
+   Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
+     2005, 2006, 2007
      National Institute of Advanced Industrial Science and Technology (AIST)
      Registration Number H14PRO021
 
@@ -443,10 +444,12 @@ struct coding_system
   Lisp_Object translation_table_for_encode;
 };
 
-#define CODING_REQUIRE_FLUSHING_MASK   1
-#define CODING_REQUIRE_DECODING_MASK   2
-#define CODING_REQUIRE_ENCODING_MASK   4
-#define CODING_REQUIRE_DETECTION_MASK  8
+/* Mask bits for (struct coding_system *)->common_flags.  */
+#define CODING_REQUIRE_FLUSHING_MASK   0x01
+#define CODING_REQUIRE_DECODING_MASK   0x02
+#define CODING_REQUIRE_ENCODING_MASK   0x04
+#define CODING_REQUIRE_DETECTION_MASK  0x08
+#define CODING_ASCII_INCOMPATIBLE_MASK 0x10
 
 /* Return 1 if the coding system CODING requires specific code to be
    attached at the tail of converted text.  */
@@ -460,7 +463,10 @@ struct coding_system
    || (coding)->common_flags & CODING_REQUIRE_DECODING_MASK)
 
 /* Return 1 if the coding system CODING requires code conversion on
-   encoding.  */
+   encoding.
+   The non-multibyte part of the condition is to support encoding of
+   unibyte strings/buffers generated by string-as-unibyte or
+   (set-buffer-multibyte nil) from multibyte strings/buffers.  */
 #define CODING_REQUIRE_ENCODING(coding)        \
   ((coding)->src_multibyte             \
    || (coding)->common_flags & CODING_REQUIRE_ENCODING_MASK)