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Fix two problems in UTF-8 decoder.

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This commit is contained in:
Ulrich Drepper 2000-01-23 08:11:29 +00:00
parent b8c5ef6242
commit bd32e4a687
1 changed files with 18 additions and 7 deletions
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25
iconv/gconv_simple.c
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@ -1,5 +1,5 @@
/* Simple transformations functions.
Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
@ -255,8 +255,11 @@ internal_ucs4_loop (const unsigned char **inptrp, const unsigned char *inend,
} \
else \
{ \
if ((ch & 0xe0) == 0xc0) \
if (ch >= 0xc2 && ch < 0xe0) \
{ \
/* We expect two bytes. The first byte cannot be 0xc0 or 0xc1, \
otherwise the wide character could have been represented \
using a single byte. */ \
cnt = 2; \
ch &= 0x1f; \
} \
@ -304,15 +307,23 @@ internal_ucs4_loop (const unsigned char **inptrp, const unsigned char *inend,
uint32_t byte = inptr[i]; \
\
if ((byte & 0xc0) != 0x80) \
{ \
/* This is an illegal encoding. */ \
result = __GCONV_ILLEGAL_INPUT; \
break; \
} \
/* This is an illegal encoding. */ \
break; \
\
ch <<= 6; \
ch |= byte & 0x3f; \
} \
\
/* If i < cnt, some trail byte was not >= 0x80, < 0xc0. \
If cnt > 2 and ch < 2^(5*cnt-4), the wide character ch could \
have been represented with fewer than cnt bytes. */ \
if (i < cnt || (cnt > 2 && (ch >> (5 * cnt - 4)) == 0)) \
{ \
/* This is an illegal encoding. */ \
result = GCONV_ILLEGAL_INPUT; \
break; \
} \
\
inptr += cnt; \
} \
\