1 files changed, 22 insertions, 11 deletions

diff --git a/src/coding.h b/src/coding.h
index 6aa9a45e714..5f851be9b52 100644
--- a/src/coding.h
+++ b/src/coding.h
@@ -234,8 +234,12 @@ enum coding_type
     coding_type_iso2022,        /* Any coding system of ISO2022
                                    variants.  */
     coding_type_big5,           /* BIG5 coding system for Chinese.  */
-    coding_type_ccl             /* The coding system of which decoder
+    coding_type_ccl,            /* The coding system of which decoder
                                    and encoder are written in CCL.  */
+    coding_type_raw_text        /* A coding system for a text
+                                   containing ramdom 8-bit code which
+                                   does not require code conversion
+                                   except for end-of-line format. */
   };
 
 /* Formats of end-of-line.  */
@@ -246,6 +250,9 @@ enum coding_type
 #define CODING_EOL_CR   2       /* Carriage-return only.  */
 #define CODING_EOL_UNDECIDED 3  /* This value is used to denote the
                                    eol-type is not yet decided.  */
+#define CODING_EOL_INCONSISTENT 4 /* This value is used to denote the
+                                     eol-type is not consistent
+                                     through the file.  */
 
 /* Character composition status while encoding/decoding.  */
 #define COMPOSING_NO             0 /* not composing */
@@ -330,17 +337,19 @@ struct coding_system
 
 /* Return 1 if coding system CODING never requires any code conversion.  */
 #define CODING_REQUIRE_NO_CONVERSION(coding)            \
-  (((coding)->type == coding_type_no_conversion         \
-    || (coding)->type == coding_type_emacs_mule)        \
-   && (coding)->eol_type == CODING_EOL_LF)
+  ((coding)->type == coding_type_no_conversion          \
+   || (((coding)->type == coding_type_emacs_mule        \
+        || (coding)->type == coding_type_raw_text)      \
+       && (coding)->eol_type == CODING_EOL_LF))
 
 /* Return 1 if coding system CODING may not require code conversion.  */
 #define CODING_MAY_REQUIRE_NO_CONVERSION(coding)        \
-  (((coding)->type == coding_type_no_conversion         \
-    || (coding)->type == coding_type_emacs_mule         \
-    || (coding)->type == coding_type_undecided)         \
-   && ((coding)->eol_type == CODING_EOL_LF              \
-       || (coding)->eol_type == CODING_EOL_UNDECIDED))
+  ((coding)->type == coding_type_no_conversion          \
+   || (((coding)->type == coding_type_emacs_mule        \
+        || (coding)->type == coding_type_undecided      \
+        || (coding)->type == coding_type_raw_text)      \
+       && ((coding)->eol_type == CODING_EOL_LF          \
+           || (coding)->eol_type == CODING_EOL_UNDECIDED)))
 
 /* Index for each coding category in `coding_category_table' */
 #define CODING_CATEGORY_IDX_EMACS_MULE  0
@@ -351,8 +360,9 @@ struct coding_system
 #define CODING_CATEGORY_IDX_ISO_7_ELSE  5
 #define CODING_CATEGORY_IDX_ISO_8_ELSE  6
 #define CODING_CATEGORY_IDX_BIG5        7
-#define CODING_CATEGORY_IDX_BINARY      8
-#define CODING_CATEGORY_IDX_MAX         9
+#define CODING_CATEGORY_IDX_RAW_TEXT    8
+#define CODING_CATEGORY_IDX_BINARY      9
+#define CODING_CATEGORY_IDX_MAX         10
 
 /* Definitions of flag bits returned by the function
    detect_coding_mask ().  */
@@ -363,6 +373,7 @@ struct coding_system
 #define CODING_CATEGORY_MASK_ISO_8_2    (1 << CODING_CATEGORY_IDX_ISO_8_2)
 #define CODING_CATEGORY_MASK_ISO_7_ELSE (1 << CODING_CATEGORY_IDX_ISO_7_ELSE)
 #define CODING_CATEGORY_MASK_ISO_8_ELSE (1 << CODING_CATEGORY_IDX_ISO_8_ELSE)
+#define CODING_CATEGORY_MASK_RAW_TEXT   (1 << CODING_CATEGORY_IDX_RAW_TEXT)
 #define CODING_CATEGORY_MASK_BIG5       (1 << CODING_CATEGORY_IDX_BIG5)
 #define CODING_CATEGORY_MASK_BINARY     (1 << CODING_CATEGORY_IDX_BINARY)