bug in BIG5 converter

[Bruno Haible]

The BIG5 iconv converter from Big5 to Unicode contains identity mappings
for 0x81..0xA0, 0xFA..0xFF. But the reverse direction doesn't do them, and
the charmap doesn't contain them either.

Here is a patch to remove this identity mapping.


2000-09-03  Bruno Haible  <haible@clisp.cons.org>

	* iconvdata/big5.c (BODY for FROM_LOOP): Bytes 0x81..0xA0, 0xFA..0xFF
	are invalid.

*** glibc-20000831/iconvdata/big5.c.bak	Wed Aug 30 23:43:37 2000
--- glibc-20000831/iconvdata/big5.c	Sun Sep  3 15:34:12 2000
***************
*** 8644,8651 ****
  									      \
  	inptr += 2;							      \
        }									      \
!     else								      \
        ++inptr;								      \
  									      \
      put32 (outptr, ch);							      \
      outptr += 4;							      \
--- 8644,8664 ----
  									      \
  	inptr += 2;							      \
        }									      \
!     else if (ch <= 0x80)						      \
        ++inptr;								      \
+     else								      \
+       {									      \
+ 	/* This is illegal.  */						      \
+ 	if (! ignore_errors_p ())					      \
+ 	  {								      \
+ 	    result = __GCONV_ILLEGAL_INPUT;				      \
+ 	    break;							      \
+ 	  }								      \
+ 									      \
+ 	++inptr;							      \
+ 	++*irreversible;						      \
+ 	continue;							      \
+       }									      \
  									      \
      put32 (outptr, ch);							      \
      outptr += 4;							      \