(struct decoding_stream): Add new member `bom_flag' in XEmacs CHISE.

(reset_decoding_stream): Ignore U+FEFF in the beginning of stream in
XEmacs CHISE.

diff --git a/src/text-coding.c b/src/text-coding.c
index b28c2d7..79c9dcb 100644 (file)
--- a/src/text-coding.c
+++ b/src/text-coding.c
@@ -2320,6 +2320,7 @@ struct decoding_stream
   unsigned char counter;
 #endif
 #ifdef UTF2000
+  char bom_flag;
   unsigned char er_counter;
   unsigned char er_buf[ER_BUF_SIZE];
 
@@ -2464,6 +2465,7 @@ reset_decoding_stream (struct decoding_stream *str)
   str->counter = 0;
 #endif /* MULE */
 #ifdef UTF2000
+  str->bom_flag = 0;
   str->er_counter = 0;
   str->combined_char_count = 0;
   str->combining_table = Qnil;
@@ -4504,6 +4506,7 @@ decode_coding_utf8 (Lstream *decoding, const Extbyte *src,
   eol_type_t eol_type  = str->eol_type;
   unsigned char counter        = str->counter;
 #ifdef UTF2000
+  int bom_flag = str->bom_flag;
   Lisp_Object ccs
     = CODING_SYSTEM_ISO2022_INITIAL_CHARSET (DECODING_STREAM_DATA
                                             (decoding)->codesys, 0);
@@ -4519,11 +4522,20 @@ decode_coding_utf8 (Lstream *decoding, const Extbyte *src,
              COMPOSE_FLUSH_CHARS (str, dst);
              decode_flush_er_chars (str, dst);
              DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
+
+             if ( bom_flag == 0 )
+               bom_flag = -1;
+
              DECODE_ADD_UCS_CHAR (c, dst);
            }
          else if ( c < 0xC0 )
-           /* decode_add_er_char (str, c, dst); */
-           COMPOSE_ADD_CHAR (str, c, dst);
+           {         
+             if ( bom_flag == 0 )
+               bom_flag = -1;
+
+             /* decode_add_er_char (str, c, dst); */
+             COMPOSE_ADD_CHAR (str, c, dst);
+           }
          else
            {
              /* decode_flush_er_chars (str, dst); */
@@ -4561,6 +4573,17 @@ decode_coding_utf8 (Lstream *decoding, const Extbyte *src,
            {
              Emchar char_id;
 
+             if ( bom_flag == 0 )
+               {
+                 if ( cpos == 0xFEFF )
+                   {
+                     bom_flag = 1;
+                     goto decoded;
+                   }
+                 else
+                   bom_flag = -1;
+               }
+
              if (!NILP (ccs))
                {
                  char_id = decode_defined_char (ccs, cpos, 0);
@@ -4571,6 +4594,7 @@ decode_coding_utf8 (Lstream *decoding, const Extbyte *src,
              else
                char_id = cpos;
              COMPOSE_ADD_CHAR (str, char_id, dst);
+           decoded:
              cpos = 0;
              counter = 0;
            }
@@ -4603,6 +4627,9 @@ decode_coding_utf8 (Lstream *decoding, const Extbyte *src,
   str->flags   = flags;
   str->cpos    = cpos;
   str->counter = counter;
+#ifdef UTF2000
+  str->bom_flag = bom_flag;
+#endif
 }
 
 void