(ccl_driver) [CCL_ReadMultibyteChar2]: If SRC points an

invalid mulitbyte sequence, treat *SRC as a character of
eight-bit-graphic.

1 files changed, 18 insertions, 12 deletions

diff --git a/src/ccl.c b/src/ccl.c
index 45cc525112d..fe7faafb9e5 100644
--- a/src/ccl.c
+++ b/src/ccl.c
@@ -1255,21 +1255,27 @@ ccl_driver (ccl, source, destination, src_bytes, dst_bytes, consumed)
                   reg[rrr] = i;
                   reg[RRR] = CHARSET_ASCII;
                 }
-              else if (i <= MAX_CHARSET_OFFICIAL_DIMENSION1)
-                {
-                  if (src >= src_end)
-                    goto ccl_read_multibyte_character_suspend;
-                  reg[RRR] = i;
-                  reg[rrr] = (*src++ & 0x7F);
-                }
               else if (i <= MAX_CHARSET_OFFICIAL_DIMENSION2)
                 {
-                  if ((src + 1) >= src_end)
+                  int dimension = BYTES_BY_CHAR_HEAD (i) - 1;
+
+                  if (dimension == 0)
+                    {
+                      /* `i' is a leading code for an undefined charset.  */
+                      reg[RRR] = CHARSET_8_BIT_GRAPHIC;
+                      reg[rrr] = i;
+                    }
+                  else if (src + dimension > src_end)
                     goto ccl_read_multibyte_character_suspend;
-                  reg[RRR] = i;
-                  i = (*src++ & 0x7F);
-                  reg[rrr] = ((i << 7) | (*src & 0x7F));
-                  src++;
+                  else
+                    {
+                      reg[RRR] = i;
+                      i = (*src++ & 0x7F);
+                      if (dimension == 1)
+                        reg[rrr] = i;
+                      else
+                        reg[rrr] = ((i << 7) | (*src++ & 0x7F));
+                    }
                 }
               else if ((i == LEADING_CODE_PRIVATE_11)
                        || (i == LEADING_CODE_PRIVATE_12))