(detect_coding_sjis): Check the byte sequence more regidly.

1 files changed, 8 insertions, 3 deletions

diff --git a/src/coding.c b/src/coding.c
index 366cf6647a7..fa079a749cb 100644
--- a/src/coding.c
+++ b/src/coding.c
@@ -2266,10 +2266,15 @@ detect_coding_sjis (src, src_end)
   while (1)
     {
       ONE_MORE_BYTE (c);
-      if ((c >= 0x80 && c < 0xA0) || c >= 0xE0)
+      if (c >= 0x81)
         {
-          ONE_MORE_BYTE (c);
-          if (c < 0x40)
+          if (c <= 0x9F || (c >= 0xE0 && c <= 0xEF))
+            {
+              ONE_MORE_BYTE (c);
+              if (c < 0x40 || c == 0x7F || c > 0xFC)
+                return 0;
+            }
+          else if (c > 0xDF)
             return 0;
         }
     }