/* Conversion loop frame work.
- Copyright (C) 1998-2014 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.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
+ <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
#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))
points. */
#define STANDARD_TO_LOOP_ERR_HANDLER(Incr) \
{ \
- struct __gconv_trans_data *trans; \
- \
result = __GCONV_ILLEGAL_INPUT; \
\
if (irreversible == NULL) \
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. */
/* 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 (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));
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. */
projects / thirdparty / glibc.git / blobdiff