/* Conversion loop frame work.
- Copyright (C) 1998-2002, 2003, 2005 Free Software Foundation, Inc.
+ Copyright (C) 1998-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
Lesser General Public License for more details.
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. */
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
/* This file provides a frame for the reader loop in all conversion modules.
The actual code must (of course) be provided in the actual module source
BODY this is supposed to expand to the body of the loop.
The user must provide this.
- EXTRA_LOOP_DECLS extra arguments passed from converion loop call.
+ EXTRA_LOOP_DECLS extra arguments passed from conversion loop call.
INIT_PARAMS code to define and initialize variables from params.
UPDATE_PARAMS code to store result in params.
#include <assert.h>
#include <endian.h>
-#include <gconv.h>
+#include <iconv/gconv_int.h>
#include <stdint.h>
#include <string.h>
#include <wchar.h>
#include <sys/param.h> /* For MIN. */
#define __need_size_t
#include <stddef.h>
-
+#include <libc-diag.h>
/* We have to provide support for machines which are not able to handled
unaligned memory accesses. Some of the character encodings have
representations with a fixed width of 2 or 4 bytes. But if we cannot
access unaligned memory we still have to read byte-wise. */
#undef FCTNAME2
-#if defined _STRING_ARCH_unaligned || !defined DEFINE_UNALIGNED
+#if _STRING_ARCH_unaligned || !defined DEFINE_UNALIGNED
/* We can handle unaligned memory access. */
-# define get16(addr) *((__const uint16_t *) (addr))
-# define get32(addr) *((__const uint32_t *) (addr))
+# define get16(addr) *((const uint16_t *) (addr))
+# define get32(addr) *((const uint32_t *) (addr))
/* We need no special support for writing values either. */
# define put16(addr, val) *((uint16_t *) (addr)) = (val)
/* Distinguish between big endian and little endian. */
# if __BYTE_ORDER == __LITTLE_ENDIAN
# define get16(addr) \
- (((__const unsigned char *) (addr))[1] << 8 \
- | ((__const unsigned char *) (addr))[0])
+ (((const unsigned char *) (addr))[1] << 8 \
+ | ((const unsigned char *) (addr))[0])
# define get32(addr) \
- (((((__const unsigned char *) (addr))[3] << 8 \
- | ((__const unsigned char *) (addr))[2]) << 8 \
- | ((__const unsigned char *) (addr))[1]) << 8 \
- | ((__const unsigned char *) (addr))[0])
+ (((((const unsigned char *) (addr))[3] << 8 \
+ | ((const unsigned char *) (addr))[2]) << 8 \
+ | ((const unsigned char *) (addr))[1]) << 8 \
+ | ((const unsigned char *) (addr))[0])
# define put16(addr, val) \
({ uint16_t __val = (val); \
(void) 0; })
# else
# define get16(addr) \
- (((__const unsigned char *) (addr))[0] << 8 \
- | ((__const unsigned char *) (addr))[1])
+ (((const unsigned char *) (addr))[0] << 8 \
+ | ((const unsigned char *) (addr))[1])
# define get32(addr) \
- (((((__const unsigned char *) (addr))[0] << 8 \
- | ((__const unsigned char *) (addr))[1]) << 8 \
- | ((__const unsigned char *) (addr))[2]) << 8 \
- | ((__const unsigned char *) (addr))[3])
+ (((((const unsigned char *) (addr))[0] << 8 \
+ | ((const unsigned char *) (addr))[1]) << 8 \
+ | ((const unsigned char *) (addr))[2]) << 8 \
+ | ((const unsigned char *) (addr))[3])
# define put16(addr, val) \
({ uint16_t __val = (val); \
# define EXTRA_LOOP_DECLS
#endif
+/* Allow using UPDATE_PARAMS in macros where #ifdef UPDATE_PARAMS test
+ isn't possible. */
+#ifndef UPDATE_PARAMS
+# define UPDATE_PARAMS do { } while (0)
+#endif
+#ifndef REINIT_PARAMS
+# define REINIT_PARAMS do { } while (0)
+#endif
+
/* To make it easier for the writers of the modules, we define a macro
to test whether we have to ignore errors. */
points. */
#define STANDARD_TO_LOOP_ERR_HANDLER(Incr) \
{ \
- struct __gconv_trans_data *trans; \
- \
result = __GCONV_ILLEGAL_INPUT; \
\
if (irreversible == NULL) \
case we are not doing any error recovery outself. */ \
break; \
\
+ /* If needed, flush any conversion state, so that __gconv_transliterate \
+ starts with current shift state. */ \
+ UPDATE_PARAMS; \
+ \
/* First try the transliteration methods. */ \
- for (trans = step_data->__trans; trans != NULL; trans = trans->__next) \
- { \
- result = DL_CALL_FCT (trans->__trans_fct, \
- (step, step_data, trans->__data, *inptrp, \
- &inptr, inend, &outptr, irreversible)); \
- if (result != __GCONV_ILLEGAL_INPUT) \
- break; \
- } \
+ if ((step_data->__flags & __GCONV_TRANSLIT) != 0) \
+ result = __gconv_transliterate \
+ (step, step_data, *inptrp, \
+ &inptr, inend, &outptr, irreversible); \
+ \
+ REINIT_PARAMS; \
+ \
/* If any of them recognized the input continue with the loop. */ \
if (result != __GCONV_ILLEGAL_INPUT) \
{ \
- if (__builtin_expect (result == __GCONV_FULL_OUTPUT, 0)) \
+ if (__glibc_unlikely (result == __GCONV_FULL_OUTPUT)) \
break; \
\
continue; \
}
+/* With GCC 7 when compiling with -Os for 32-bit s390 the compiler
+ warns that the variable 'ch', in the definition of BODY in
+ sysdeps/s390/multiarch/8bit-generic.c, may be used uninitialized in
+ the call to UNICODE_TAG_HANDLER in that macro. This variable is
+ actually always initialized before use, in the prior loop if INDEX
+ is nonzero and in the following 'if' if INDEX is zero. That code
+ has a comment referencing this diagnostic disabling; updates in one
+ place may require updates in the other. */
+DIAG_PUSH_NEEDS_COMMENT;
+DIAG_IGNORE_Os_NEEDS_COMMENT (7, "-Wmaybe-uninitialized");
/* Handling of Unicode 3.1 TAG characters. Unicode recommends
"If language codes are not relevant to the particular processing
operation, then they should be ignored." This macro is usually
continue; \
} \
}
+DIAG_POP_NEEDS_COMMENT;
/* The function returns the status, as defined in gconv.h. */
/* Update the pointers pointed to by the parameters. */
*inptrp = inptr;
*outptrp = outptr;
-#ifdef UPDATE_PARAMS
UPDATE_PARAMS;
-#endif
return result;
}
/* Include the file a second time to define the function to handle
unaligned access. */
-#if !defined DEFINE_UNALIGNED && !defined _STRING_ARCH_unaligned \
+#if !defined DEFINE_UNALIGNED && !_STRING_ARCH_unaligned \
&& MIN_NEEDED_INPUT != 1 && MAX_NEEDED_INPUT % MIN_NEEDED_INPUT == 0 \
&& MIN_NEEDED_OUTPUT != 1 && MAX_NEEDED_OUTPUT % MIN_NEEDED_OUTPUT == 0
# undef get16
# define DEFINE_UNALIGNED
# include "loop.c"
# undef DEFINE_UNALIGNED
-#endif
-
-
-#if MAX_NEEDED_INPUT > 1
-# define SINGLE(fct) SINGLE2 (fct)
-# define SINGLE2(fct) fct##_single
+#else
+# if MAX_NEEDED_INPUT > 1
+# define SINGLE(fct) SINGLE2 (fct)
+# define SINGLE2(fct) fct##_single
static inline int
__attribute ((always_inline))
SINGLE(LOOPFCT) (struct __gconv_step *step,
size_t *irreversible EXTRA_LOOP_DECLS)
{
mbstate_t *state = step_data->__statep;
-#ifdef LOOP_NEED_FLAGS
+# ifdef LOOP_NEED_FLAGS
int flags = step_data->__flags;
-#endif
-#ifdef LOOP_NEED_DATA
+# endif
+# ifdef LOOP_NEED_DATA
void *data = step->__data;
-#endif
+# endif
int result = __GCONV_OK;
unsigned char bytebuf[MAX_NEEDED_INPUT];
const unsigned char *inptr = *inptrp;
unsigned char *outptr = *outptrp;
size_t inlen;
-#ifdef INIT_PARAMS
+# ifdef INIT_PARAMS
INIT_PARAMS;
-#endif
+# endif
-#ifdef UNPACK_BYTES
+# ifdef UNPACK_BYTES
UNPACK_BYTES
-#else
+# else
/* Add the bytes from the state to the input buffer. */
+ assert ((state->__count & 7) <= sizeof (state->__value));
for (inlen = 0; inlen < (size_t) (state->__count & 7); ++inlen)
bytebuf[inlen] = state->__value.__wchb[inlen];
-#endif
+# endif
/* Are there enough bytes in the input buffer? */
- if (__builtin_expect (inptr + (MIN_NEEDED_INPUT - inlen) > inend, 0))
+ if (MIN_NEEDED_INPUT > 1
+ && __builtin_expect (inptr + (MIN_NEEDED_INPUT - inlen) > inend, 0))
{
*inptrp = inend;
-#ifdef STORE_REST
+# ifdef STORE_REST
+
+ /* Building with -O3 GCC emits a `array subscript is above array
+ bounds' warning. GCC BZ #64739 has been opened for this. */
+ DIAG_PUSH_NEEDS_COMMENT;
+ DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Warray-bounds");
+ while (inptr < inend)
+ bytebuf[inlen++] = *inptr++;
+ DIAG_POP_NEEDS_COMMENT;
+
inptr = bytebuf;
inptrp = &inptr;
inend = &bytebuf[inlen];
STORE_REST
-#else
+# else
/* We don't have enough input for another complete input
character. */
while (inptr < inend)
state->__value.__wchb[inlen++] = *inptr++;
-#endif
+# endif
return __GCONV_INCOMPLETE_INPUT;
}
bytes from the state and at least one more, or the character is still
incomplete, or we have some other error (like illegal input character,
no space in output buffer). */
- if (__builtin_expect (inptr != bytebuf, 1))
+ if (__glibc_likely (inptr != bytebuf))
{
/* We found a new character. */
assert (inptr - bytebuf > (state->__count & 7));
result = __GCONV_OK;
/* Clear the state buffer. */
-#ifdef CLEAR_STATE
+# ifdef CLEAR_STATE
CLEAR_STATE;
-#else
+# else
state->__count &= ~7;
-#endif
+# endif
}
else if (result == __GCONV_INCOMPLETE_INPUT)
{
assert (inend != &bytebuf[MAX_NEEDED_INPUT]);
*inptrp += inend - bytebuf - (state->__count & 7);
-#ifdef STORE_REST
+# ifdef STORE_REST
inptrp = &inptr;
STORE_REST
-#else
+# else
/* We don't have enough input for another complete input
character. */
assert (inend - inptr > (state->__count & ~7));
- assert (inend - inptr <= 7);
+ assert (inend - inptr <= sizeof (state->__value));
state->__count = (state->__count & ~7) | (inend - inptr);
inlen = 0;
while (inptr < inend)
state->__value.__wchb[inlen++] = *inptr++;
-#endif
+# endif
}
return result;
}
-# undef SINGLE
-# undef SINGLE2
-#endif
+# undef SINGLE
+# undef SINGLE2
+# endif
-#ifdef ONEBYTE_BODY
+# ifdef ONEBYTE_BODY
/* Define the shortcut function for btowc. */
static wint_t
gconv_btowc (struct __gconv_step *step, unsigned char c)
ONEBYTE_BODY
-# define FROM_ONEBYTE gconv_btowc
-#endif
+# define FROM_ONEBYTE gconv_btowc
+# endif
+#endif
/* We remove the macro definitions so that we can include this file again
for the definition of another function. */
#undef EXTRA_LOOP_DECLS
#undef INIT_PARAMS
#undef UPDATE_PARAMS
+#undef REINIT_PARAMS
#undef ONEBYTE_BODY
#undef UNPACK_BYTES
#undef CLEAR_STATE
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