/* Conversion module for UTF-16.
- Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+ Copyright (C) 1999, 2000-2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
#include <byteswap.h>
+#include <dlfcn.h>
#include <gconv.h>
#include <stddef.h>
#include <stdint.h>
/* This is the Byte Order Mark character (BOM). */
#define BOM 0xfeff
+/* And in the other byte order. */
+#define BOM_OE 0xfffe
/* Definitions used in the body of the `gconv' function. */
#define PREPARE_LOOP \
enum direction dir = ((struct utf16_data *) step->__data)->dir; \
enum variant var = ((struct utf16_data *) step->__data)->var; \
- if (!FROM_DIRECTION && var == UTF_16 && !data->__internal_use \
- && data->__invocation_counter == 0) \
+ int swap; \
+ if (FROM_DIRECTION && var == UTF_16) \
+ { \
+ if (data->__invocation_counter == 0) \
+ { \
+ /* We have to find out which byte order the file is encoded in. */ \
+ if (inptr + 2 > inend) \
+ return (inptr == inend \
+ ? __GCONV_EMPTY_INPUT : __GCONV_INCOMPLETE_INPUT); \
+ \
+ if (get16u (inptr) == BOM) \
+ /* Simply ignore the BOM character. */ \
+ *inptrp = inptr += 2; \
+ else if (get16u (inptr) == BOM_OE) \
+ { \
+ ((struct utf16_data *) step->__data)->swap = 1; \
+ *inptrp = inptr += 2; \
+ } \
+ } \
+ } \
+ else if (!FROM_DIRECTION && var == UTF_16 && !data->__internal_use \
+ && data->__invocation_counter == 0) \
{ \
/* Emit the Byte Order Mark. */ \
- if (outbuf + 2 > outend) \
+ if (__builtin_expect (outbuf + 2 > outend, 0)) \
return __GCONV_FULL_OUTPUT; \
\
- *(uint16_t *) outbuf = BOM; \
+ put16u (outbuf, BOM); \
outbuf += 2; \
- }
-#define EXTRA_LOOP_ARGS , var, data
+ } \
+ swap = ((struct utf16_data *) step->__data)->swap;
+#define EXTRA_LOOP_ARGS , var, swap
/* Direction of the transformation. */
{
enum direction dir;
enum variant var;
+ int swap;
};
+extern int gconv_init (struct __gconv_step *step);
int
gconv_init (struct __gconv_step *step)
{
enum variant var = illegal_var;
int result;
- if (__strcasecmp (step->__from_name, "UTF-16") == 0)
+ if (__strcasecmp (step->__from_name, "UTF-16//") == 0)
{
dir = from_utf16;
var = UTF_16;
}
- else if (__strcasecmp (step->__to_name, "UTF-16") == 0)
+ else if (__strcasecmp (step->__to_name, "UTF-16//") == 0)
{
dir = to_utf16;
var = UTF_16;
}
- else if (__strcasecmp (step->__from_name, "UTF-16BE") == 0)
+ else if (__strcasecmp (step->__from_name, "UTF-16BE//") == 0)
{
dir = from_utf16;
var = UTF_16BE;
}
- else if (__strcasecmp (step->__to_name, "UTF-16BE") == 0)
+ else if (__strcasecmp (step->__to_name, "UTF-16BE//") == 0)
{
dir = to_utf16;
var = UTF_16BE;
}
- else if (__strcasecmp (step->__from_name, "UTF-16LE") == 0)
+ else if (__strcasecmp (step->__from_name, "UTF-16LE//") == 0)
{
dir = from_utf16;
var = UTF_16LE;
}
- else if (__strcasecmp (step->__to_name, "UTF-16LE") == 0)
+ else if (__strcasecmp (step->__to_name, "UTF-16LE//") == 0)
{
dir = to_utf16;
var = UTF_16LE;
}
result = __GCONV_NOCONV;
- if (dir != illegal_dir)
+ if (__builtin_expect (dir, to_utf16) != illegal_dir)
{
new_data = (struct utf16_data *) malloc (sizeof (struct utf16_data));
{
new_data->dir = dir;
new_data->var = var;
+ new_data->swap = ((var == UTF_16LE && BYTE_ORDER == BIG_ENDIAN)
+ || (var == UTF_16BE
+ && BYTE_ORDER == LITTLE_ENDIAN));
step->__data = new_data;
if (dir == from_utf16)
{
step->__min_needed_from = MIN_NEEDED_FROM;
- step->__max_needed_from = MIN_NEEDED_FROM;
+ step->__max_needed_from = MAX_NEEDED_FROM;
step->__min_needed_to = MIN_NEEDED_TO;
step->__max_needed_to = MIN_NEEDED_TO;
}
step->__min_needed_from = MIN_NEEDED_TO;
step->__max_needed_from = MIN_NEEDED_TO;
step->__min_needed_to = MIN_NEEDED_FROM;
- step->__max_needed_to = MIN_NEEDED_FROM;
+ step->__max_needed_to = MAX_NEEDED_FROM;
}
step->__stateful = 0;
}
+extern void gconv_end (struct __gconv_step *data);
void
gconv_end (struct __gconv_step *data)
{
#define LOOPFCT TO_LOOP
#define BODY \
{ \
- uint32_t c = *((uint32_t *) inptr); \
+ uint32_t c = get32 (inptr); \
\
- if ((__BYTE_ORDER == __LITTLE_ENDIAN && var == UTF_16BE) \
- || (__BYTE_ORDER == __BIG_ENDIAN && var == UTF_16LE)) \
+ if (__builtin_expect (c >= 0xd800 && c < 0xe000, 0)) \
{ \
- if (c >= 0x10000) \
+ /* Surrogate characters in UCS-4 input are not valid. \
+ We must catch this. If we let surrogates pass through, \
+ attackers could make a security hole exploit by \
+ synthesizing any desired plane 1-16 character. */ \
+ result = __GCONV_ILLEGAL_INPUT; \
+ if (! ignore_errors_p ()) \
+ break; \
+ inptr += 4; \
+ ++*irreversible; \
+ continue; \
+ } \
+ \
+ if (swap) \
+ { \
+ if (__builtin_expect (c >= 0x10000, 0)) \
{ \
- if (c >= 0x110000) \
+ if (__builtin_expect (c >= 0x110000, 0)) \
{ \
- result = __GCONV_ILLEGAL_INPUT; \
- break; \
+ STANDARD_TO_LOOP_ERR_HANDLER (4); \
} \
\
/* Generate a surrogate character. */ \
- if (NEED_LENGTH_TEST && outptr + 4 > outend) \
+ if (__builtin_expect (outptr + 4 > outend, 0)) \
{ \
/* Overflow in the output buffer. */ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
\
- *((uint16_t *) outptr) = bswap_16 (0xd7c0 + (c >> 10)); \
+ put16 (outptr, bswap_16 (0xd7c0 + (c >> 10))); \
outptr += 2; \
- *((uint16_t *) outptr) = bswap_16 (0xdc00 + (c & 0x3ff)); \
+ put16 (outptr, bswap_16 (0xdc00 + (c & 0x3ff))); \
} \
else \
- *((uint16_t *) outptr) = bswap_16 (c); \
+ put16 (outptr, bswap_16 (c)); \
} \
else \
{ \
- if (c >= 0x10000) \
+ if (__builtin_expect (c >= 0x10000, 0)) \
{ \
- if (c >= 0x110000) \
+ if (__builtin_expect (c >= 0x110000, 0)) \
{ \
- result = __GCONV_ILLEGAL_INPUT; \
- break; \
+ STANDARD_TO_LOOP_ERR_HANDLER (4); \
} \
\
/* Generate a surrogate character. */ \
- if (NEED_LENGTH_TEST && outptr + 4 > outend) \
+ if (__builtin_expect (outptr + 4 > outend, 0)) \
{ \
/* Overflow in the output buffer. */ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
\
- *((uint16_t *) outptr) = 0xd7c0 + (c >> 10); \
+ put16 (outptr, 0xd7c0 + (c >> 10)); \
outptr += 2; \
- *((uint16_t *) outptr) = 0xdc00 + (c & 0x3ff); \
+ put16 (outptr, 0xdc00 + (c & 0x3ff)); \
} \
else \
- *((uint16_t *) outptr) = c; \
+ put16 (outptr, c); \
} \
outptr += 2; \
inptr += 4; \
}
+#define LOOP_NEED_FLAGS
#define EXTRA_LOOP_DECLS \
- , enum variant var, struct __gconv_step_data *step_data
+ , enum variant var, int swap
#include <iconv/loop.c>
#define LOOPFCT FROM_LOOP
#define BODY \
{ \
- uint16_t u1 = *(uint16_t *) inptr; \
+ uint16_t u1 = get16 (inptr); \
\
- if ((__BYTE_ORDER == __LITTLE_ENDIAN && var == UTF_16BE) \
- || (__BYTE_ORDER == __BIG_ENDIAN && var == UTF_16LE)) \
+ if (swap) \
{ \
u1 = bswap_16 (u1); \
\
- if (u1 < 0xd800 || u1 > 0xdfff) \
+ if (__builtin_expect (u1 < 0xd800, 1) || u1 > 0xdfff) \
{ \
/* No surrogate. */ \
- *((uint32_t *) outptr) = u1; \
+ put32 (outptr, u1); \
inptr += 2; \
} \
else \
\
/* It's a surrogate character. At least the first word says \
it is. */ \
- if (NEED_LENGTH_TEST && inptr + 4 > inend) \
+ if (__builtin_expect (inptr + 4 > inend, 0)) \
{ \
/* We don't have enough input for another complete input \
character. */ \
break; \
} \
\
- u2 = bswap_16 (((uint16_t *) inptr)[1]); \
- if (u2 < 0xdc00 || u2 >= 0xdfff) \
+ inptr += 2; \
+ u2 = bswap_16 (get16 (inptr)); \
+ if (__builtin_expect (u2 < 0xdc00, 0) \
+ || __builtin_expect (u2 == 0xdfff, 0)) \
{ \
/* This is no valid second word for a surrogate. */ \
- result = __GCONV_ILLEGAL_INPUT; \
- break; \
+ inptr -= 2; \
+ STANDARD_FROM_LOOP_ERR_HANDLER (2); \
} \
\
- *((uint32_t *) outptr) = ((u1 - 0xd7c0) << 10) + (u2 - 0xdc00); \
- inptr += 4; \
+ put32 (outptr, ((u1 - 0xd7c0) << 10) + (u2 - 0xdc00)); \
+ inptr += 2; \
} \
} \
else \
{ \
- if (u1 == BOM && var == UTF_16 && !step_data->__internal_use \
- && step_data->__invocation_counter == 0 && inptr == *inptrp) \
- { \
- /* This is the first word in the file and it is the BOM and \
- we are converting a file without specified byte order. \
- Simply sack the BOM. */ \
- inptr += 2; \
- continue; \
- } \
- \
- if (u1 < 0xd800 || u1 > 0xdfff) \
+ if (__builtin_expect (u1 < 0xd800, 1) || u1 > 0xdfff) \
{ \
/* No surrogate. */ \
- *((uint32_t *) outptr) = u1; \
+ put32 (outptr, u1); \
inptr += 2; \
} \
else \
\
/* It's a surrogate character. At least the first word says \
it is. */ \
- if (NEED_LENGTH_TEST && inptr + 4 > inend) \
+ if (__builtin_expect (inptr + 4 > inend, 0)) \
{ \
/* We don't have enough input for another complete input \
character. */ \
break; \
} \
\
- u2 = ((uint16_t *) inptr)[1]; \
- if (u2 < 0xdc00 || u2 >= 0xdfff) \
+ inptr += 2; \
+ u2 = get16 (inptr); \
+ if (__builtin_expect (u2 < 0xdc00, 0) \
+ || __builtin_expect (u2 >= 0xdfff, 0)) \
{ \
/* This is no valid second word for a surrogate. */ \
- result = __GCONV_ILLEGAL_INPUT; \
- break; \
+ inptr -= 2; \
+ STANDARD_FROM_LOOP_ERR_HANDLER (2); \
} \
\
- *((uint32_t *) outptr) = ((u1 - 0xd7c0) << 10) + (u2 - 0xdc00); \
- inptr += 4; \
+ put32 (outptr, ((u1 - 0xd7c0) << 10) + (u2 - 0xdc00)); \
+ inptr += 2; \
} \
} \
outptr += 4; \
}
+#define LOOP_NEED_FLAGS
#define EXTRA_LOOP_DECLS \
- , enum variant var, struct __gconv_step_data *step_data
+ , enum variant var, int swap
#include <iconv/loop.c>
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