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glibc/string/bits/string2.h

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/* Machine-independant string function optimizations.
Copyright (C) 1997-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
The GNU C Library is free software; you can redistribute it and/or
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
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, see
<http://www.gnu.org/licenses/>. */
#ifndef _STRING_H
# error "Never use <bits/string2.h> directly; include <string.h> instead."
#endif
#ifndef __NO_STRING_INLINES
/* Unlike the definitions in the header <bits/string.h> the
definitions contained here are not optimized down to assembler
level. Those optimizations are not always a good idea since this
means the code size increases a lot. Instead the definitions here
optimize some functions in a way which do not dramatically
increase the code size and which do not use assembler. The main
trick is to use GCC's `__builtin_constant_p' function.
Every function XXX which has a defined version in
<bits/string.h> must be accompanied by a symbol _HAVE_STRING_ARCH_XXX
to make sure we don't get redefinitions.
We must use here macros instead of inline functions since the
trick won't work with the latter. */
#ifndef __STRING_INLINE
# ifdef __cplusplus
# define __STRING_INLINE inline
# else
# define __STRING_INLINE __extern_inline
# endif
#endif
#if _STRING_ARCH_unaligned
/* If we can do unaligned memory accesses we must know the endianess. */
# include <endian.h>
# include <bits/types.h>
# if __BYTE_ORDER == __LITTLE_ENDIAN
# define __STRING2_SMALL_GET16(src, idx) \
(((const unsigned char *) (const char *) (src))[idx + 1] << 8 \
| ((const unsigned char *) (const char *) (src))[idx])
# define __STRING2_SMALL_GET32(src, idx) \
(((((const unsigned char *) (const char *) (src))[idx + 3] << 8 \
| ((const unsigned char *) (const char *) (src))[idx + 2]) << 8 \
| ((const unsigned char *) (const char *) (src))[idx + 1]) << 8 \
| ((const unsigned char *) (const char *) (src))[idx])
# else
# define __STRING2_SMALL_GET16(src, idx) \
(((const unsigned char *) (const char *) (src))[idx] << 8 \
| ((const unsigned char *) (const char *) (src))[idx + 1])
# define __STRING2_SMALL_GET32(src, idx) \
(((((const unsigned char *) (const char *) (src))[idx] << 8 \
| ((const unsigned char *) (const char *) (src))[idx + 1]) << 8 \
| ((const unsigned char *) (const char *) (src))[idx + 2]) << 8 \
| ((const unsigned char *) (const char *) (src))[idx + 3])
# endif
#else
/* These are a few types we need for the optimizations if we cannot
use unaligned memory accesses. */
# define __STRING2_COPY_TYPE(N) \
typedef struct { unsigned char __arr[N]; } \
__attribute__ ((__packed__)) __STRING2_COPY_ARR##N
__STRING2_COPY_TYPE (2);
__STRING2_COPY_TYPE (3);
__STRING2_COPY_TYPE (4);
__STRING2_COPY_TYPE (5);
__STRING2_COPY_TYPE (6);
__STRING2_COPY_TYPE (7);
__STRING2_COPY_TYPE (8);
# undef __STRING2_COPY_TYPE
#endif
/* Dereferencing a pointer arg to run sizeof on it fails for the void
pointer case, so we use this instead.
Note that __x is evaluated twice. */
#define __string2_1bptr_p(__x) \
((size_t)(const void *)((__x) + 1) - (size_t)(const void *)(__x) == 1)
/* Set N bytes of S to C. */
#if !defined _HAVE_STRING_ARCH_memset
# if !__GNUC_PREREQ (3, 0)
# if _STRING_ARCH_unaligned
# define memset(s, c, n) \
(__extension__ (__builtin_constant_p (n) && (n) <= 16 \
? ((n) == 1 \
? __memset_1 (s, c) \
: __memset_gc (s, c, n)) \
: (__builtin_constant_p (c) && (c) == '\0' \
? ({ void *__s = (s); __bzero (__s, n); __s; }) \
: memset (s, c, n))))
# define __memset_1(s, c) ({ void *__s = (s); \
*((__uint8_t *) __s) = (__uint8_t) c; __s; })
# define __memset_gc(s, c, n) \
({ void *__s = (s); \
union { \
unsigned int __ui; \
unsigned short int __usi; \
unsigned char __uc; \
} *__u = __s; \
__uint8_t __c = (__uint8_t) (c); \
\
/* This `switch' statement will be removed at compile-time. */ \
switch ((unsigned int) (n)) \
{ \
case 15: \
__u->__ui = __c * 0x01010101; \
__u = __extension__ ((void *) __u + 4); \
case 11: \
__u->__ui = __c * 0x01010101; \
__u = __extension__ ((void *) __u + 4); \
case 7: \
__u->__ui = __c * 0x01010101; \
__u = __extension__ ((void *) __u + 4); \
case 3: \
__u->__usi = (unsigned short int) __c * 0x0101; \
__u = __extension__ ((void *) __u + 2); \
__u->__uc = (unsigned char) __c; \
break; \
\
case 14: \
__u->__ui = __c * 0x01010101; \
__u = __extension__ ((void *) __u + 4); \
case 10: \
__u->__ui = __c * 0x01010101; \
__u = __extension__ ((void *) __u + 4); \
case 6: \
__u->__ui = __c * 0x01010101; \
__u = __extension__ ((void *) __u + 4); \
case 2: \
__u->__usi = (unsigned short int) __c * 0x0101; \
break; \
\
case 13: \
__u->__ui = __c * 0x01010101; \
__u = __extension__ ((void *) __u + 4); \
case 9: \
__u->__ui = __c * 0x01010101; \
__u = __extension__ ((void *) __u + 4); \
case 5: \
__u->__ui = __c * 0x01010101; \
__u = __extension__ ((void *) __u + 4); \
case 1: \
__u->__uc = (unsigned char) __c; \
break; \
\
case 16: \
__u->__ui = __c * 0x01010101; \
__u = __extension__ ((void *) __u + 4); \
case 12: \
__u->__ui = __c * 0x01010101; \
__u = __extension__ ((void *) __u + 4); \
case 8: \
__u->__ui = __c * 0x01010101; \
__u = __extension__ ((void *) __u + 4); \
case 4: \
__u->__ui = __c * 0x01010101; \
case 0: \
break; \
} \
\
__s; })
# else
# define memset(s, c, n) \
(__extension__ (__builtin_constant_p (c) && (c) == '\0' \
? ({ void *__s = (s); __bzero (__s, n); __s; }) \
: memset (s, c, n)))
# endif
# endif
/* GCC < 3.0 optimizes memset(s, 0, n) but not bzero(s, n).
The optimization is broken before EGCS 1.1.
GCC 3.0+ has __builtin_bzero as well, but at least till GCC 3.4
if it decides to call the library function, it calls memset
and not bzero. */
# if __GNUC_PREREQ (2, 91)
# define __bzero(s, n) __builtin_memset (s, '\0', n)
# endif
#endif
/* Copy N bytes from SRC to DEST, returning pointer to byte following the
last copied. */
#ifdef __USE_GNU
# if !defined _HAVE_STRING_ARCH_mempcpy || defined _FORCE_INLINES
# ifndef _HAVE_STRING_ARCH_mempcpy
# if __GNUC_PREREQ (3, 4)
# define __mempcpy(dest, src, n) __builtin_mempcpy (dest, src, n)
# elif __GNUC_PREREQ (3, 0)
# define __mempcpy(dest, src, n) \
(__extension__ (__builtin_constant_p (src) && __builtin_constant_p (n) \
&& __string2_1bptr_p (src) && n <= 8 \
? __builtin_memcpy (dest, src, n) + (n) \
: __mempcpy (dest, src, n)))
# else
# define __mempcpy(dest, src, n) \
(__extension__ (__builtin_constant_p (src) && __builtin_constant_p (n) \
&& __string2_1bptr_p (src) && n <= 8 \
? __mempcpy_small (dest, __mempcpy_args (src), n) \
: __mempcpy (dest, src, n)))
# endif
/* In glibc we use this function frequently but for namespace reasons
we have to use the name `__mempcpy'. */
# define mempcpy(dest, src, n) __mempcpy (dest, src, n)
# endif
# if !__GNUC_PREREQ (3, 0) || defined _FORCE_INLINES
# if _STRING_ARCH_unaligned
# ifndef _FORCE_INLINES
# define __mempcpy_args(src) \
((const char *) (src))[0], ((const char *) (src))[2], \
((const char *) (src))[4], ((const char *) (src))[6], \
__extension__ __STRING2_SMALL_GET16 (src, 0), \
__extension__ __STRING2_SMALL_GET16 (src, 4), \
__extension__ __STRING2_SMALL_GET32 (src, 0), \
__extension__ __STRING2_SMALL_GET32 (src, 4)
# endif
__STRING_INLINE void *__mempcpy_small (void *, char, char, char, char,
__uint16_t, __uint16_t, __uint32_t,
__uint32_t, size_t);
__STRING_INLINE void *
__mempcpy_small (void *__dest1,
char __src0_1, char __src2_1, char __src4_1, char __src6_1,
__uint16_t __src0_2, __uint16_t __src4_2,
__uint32_t __src0_4, __uint32_t __src4_4,
size_t __srclen)
{
union {
__uint32_t __ui;
__uint16_t __usi;
unsigned char __uc;
unsigned char __c;
} *__u = __dest1;
switch ((unsigned int) __srclen)
{
case 1:
__u->__c = __src0_1;
__u = __extension__ ((void *) __u + 1);
break;
case 2:
__u->__usi = __src0_2;
__u = __extension__ ((void *) __u + 2);
break;
case 3:
__u->__usi = __src0_2;
__u = __extension__ ((void *) __u + 2);
__u->__c = __src2_1;
__u = __extension__ ((void *) __u + 1);
break;
case 4:
__u->__ui = __src0_4;
__u = __extension__ ((void *) __u + 4);
break;
case 5:
__u->__ui = __src0_4;
__u = __extension__ ((void *) __u + 4);
__u->__c = __src4_1;
__u = __extension__ ((void *) __u + 1);
break;
case 6:
__u->__ui = __src0_4;
__u = __extension__ ((void *) __u + 4);
__u->__usi = __src4_2;
__u = __extension__ ((void *) __u + 2);
break;
case 7:
__u->__ui = __src0_4;
__u = __extension__ ((void *) __u + 4);
__u->__usi = __src4_2;
__u = __extension__ ((void *) __u + 2);
__u->__c = __src6_1;
__u = __extension__ ((void *) __u + 1);
break;
case 8:
__u->__ui = __src0_4;
__u = __extension__ ((void *) __u + 4);
__u->__ui = __src4_4;
__u = __extension__ ((void *) __u + 4);
break;
}
return (void *) __u;
}
# else
# ifndef _FORCE_INLINES
# define __mempcpy_args(src) \
((const char *) (src))[0], \
__extension__ ((__STRING2_COPY_ARR2) \
{ { ((const char *) (src))[0], ((const char *) (src))[1] } }), \
__extension__ ((__STRING2_COPY_ARR3) \
{ { ((const char *) (src))[0], ((const char *) (src))[1], \
((const char *) (src))[2] } }), \
__extension__ ((__STRING2_COPY_ARR4) \
{ { ((const char *) (src))[0], ((const char *) (src))[1], \
((const char *) (src))[2], ((const char *) (src))[3] } }), \
__extension__ ((__STRING2_COPY_ARR5) \
{ { ((const char *) (src))[0], ((const char *) (src))[1], \
((const char *) (src))[2], ((const char *) (src))[3], \
((const char *) (src))[4] } }), \
__extension__ ((__STRING2_COPY_ARR6) \
{ { ((const char *) (src))[0], ((const char *) (src))[1], \
((const char *) (src))[2], ((const char *) (src))[3], \
((const char *) (src))[4], ((const char *) (src))[5] } }), \
__extension__ ((__STRING2_COPY_ARR7) \
{ { ((const char *) (src))[0], ((const char *) (src))[1], \
((const char *) (src))[2], ((const char *) (src))[3], \
((const char *) (src))[4], ((const char *) (src))[5], \
((const char *) (src))[6] } }), \
__extension__ ((__STRING2_COPY_ARR8) \
{ { ((const char *) (src))[0], ((const char *) (src))[1], \
((const char *) (src))[2], ((const char *) (src))[3], \
((const char *) (src))[4], ((const char *) (src))[5], \
((const char *) (src))[6], ((const char *) (src))[7] } })
# endif
__STRING_INLINE void *__mempcpy_small (void *, char, __STRING2_COPY_ARR2,
__STRING2_COPY_ARR3,
__STRING2_COPY_ARR4,
__STRING2_COPY_ARR5,
__STRING2_COPY_ARR6,
__STRING2_COPY_ARR7,
__STRING2_COPY_ARR8, size_t);
__STRING_INLINE void *
__mempcpy_small (void *__dest, char __src1,
__STRING2_COPY_ARR2 __src2, __STRING2_COPY_ARR3 __src3,
__STRING2_COPY_ARR4 __src4, __STRING2_COPY_ARR5 __src5,
__STRING2_COPY_ARR6 __src6, __STRING2_COPY_ARR7 __src7,
__STRING2_COPY_ARR8 __src8, size_t __srclen)
{
union {
char __c;
__STRING2_COPY_ARR2 __sca2;
__STRING2_COPY_ARR3 __sca3;
__STRING2_COPY_ARR4 __sca4;
__STRING2_COPY_ARR5 __sca5;
__STRING2_COPY_ARR6 __sca6;
__STRING2_COPY_ARR7 __sca7;
__STRING2_COPY_ARR8 __sca8;
} *__u = __dest;
switch ((unsigned int) __srclen)
{
case 1:
__u->__c = __src1;
break;
case 2:
__extension__ __u->__sca2 = __src2;
break;
case 3:
__extension__ __u->__sca3 = __src3;
break;
case 4:
__extension__ __u->__sca4 = __src4;
break;
case 5:
__extension__ __u->__sca5 = __src5;
break;
case 6:
__extension__ __u->__sca6 = __src6;
break;
case 7:
__extension__ __u->__sca7 = __src7;
break;
case 8:
__extension__ __u->__sca8 = __src8;
break;
}
return __extension__ ((void *) __u + __srclen);
}
# endif
# endif
# endif
#endif
/* Return pointer to C in S. */
#ifndef _HAVE_STRING_ARCH_strchr
extern void *__rawmemchr (const void *__s, int __c);
# if __GNUC_PREREQ (3, 2)
# define strchr(s, c) \
(__extension__ (__builtin_constant_p (c) && !__builtin_constant_p (s) \
&& (c) == '\0' \
? (char *) __rawmemchr (s, c) \
: __builtin_strchr (s, c)))
# else
# define strchr(s, c) \
(__extension__ (__builtin_constant_p (c) && (c) == '\0' \
? (char *) __rawmemchr (s, c) \
: strchr (s, c)))
# endif
#endif
/* Copy SRC to DEST. */
#if (!defined _HAVE_STRING_ARCH_strcpy && !__GNUC_PREREQ (3, 0)) \
|| defined _FORCE_INLINES
# if !defined _HAVE_STRING_ARCH_strcpy && !__GNUC_PREREQ (3, 0)
# define strcpy(dest, src) \
(__extension__ (__builtin_constant_p (src) \
? (__string2_1bptr_p (src) && strlen (src) + 1 <= 8 \
? __strcpy_small (dest, __strcpy_args (src), \
strlen (src) + 1) \
: (char *) memcpy (dest, src, strlen (src) + 1)) \
: strcpy (dest, src)))
# endif
# if _STRING_ARCH_unaligned
# ifndef _FORCE_INLINES
# define __strcpy_args(src) \
__extension__ __STRING2_SMALL_GET16 (src, 0), \
__extension__ __STRING2_SMALL_GET16 (src, 4), \
__extension__ __STRING2_SMALL_GET32 (src, 0), \
__extension__ __STRING2_SMALL_GET32 (src, 4)
# endif
__STRING_INLINE char *__strcpy_small (char *, __uint16_t, __uint16_t,
__uint32_t, __uint32_t, size_t);
__STRING_INLINE char *
__strcpy_small (char *__dest,
__uint16_t __src0_2, __uint16_t __src4_2,
__uint32_t __src0_4, __uint32_t __src4_4,
size_t __srclen)
{
union {
__uint32_t __ui;
__uint16_t __usi;
unsigned char __uc;
} *__u = (void *) __dest;
switch ((unsigned int) __srclen)
{
case 1:
__u->__uc = '\0';
break;
case 2:
__u->__usi = __src0_2;
break;
case 3:
__u->__usi = __src0_2;
__u = __extension__ ((void *) __u + 2);
__u->__uc = '\0';
break;
case 4:
__u->__ui = __src0_4;
break;
case 5:
__u->__ui = __src0_4;
__u = __extension__ ((void *) __u + 4);
__u->__uc = '\0';
break;
case 6:
__u->__ui = __src0_4;
__u = __extension__ ((void *) __u + 4);
__u->__usi = __src4_2;
break;
case 7:
__u->__ui = __src0_4;
__u = __extension__ ((void *) __u + 4);
__u->__usi = __src4_2;
__u = __extension__ ((void *) __u + 2);
__u->__uc = '\0';
break;
case 8:
__u->__ui = __src0_4;
__u = __extension__ ((void *) __u + 4);
__u->__ui = __src4_4;
break;
}
return __dest;
}
# else
# ifndef _FORCE_INLINES
# define __strcpy_args(src) \
__extension__ ((__STRING2_COPY_ARR2) \
{ { ((const char *) (src))[0], '\0' } }), \
__extension__ ((__STRING2_COPY_ARR3) \
{ { ((const char *) (src))[0], ((const char *) (src))[1], \
'\0' } }), \
__extension__ ((__STRING2_COPY_ARR4) \
{ { ((const char *) (src))[0], ((const char *) (src))[1], \
((const char *) (src))[2], '\0' } }), \
__extension__ ((__STRING2_COPY_ARR5) \
{ { ((const char *) (src))[0], ((const char *) (src))[1], \
((const char *) (src))[2], ((const char *) (src))[3], \
'\0' } }), \
__extension__ ((__STRING2_COPY_ARR6) \
{ { ((const char *) (src))[0], ((const char *) (src))[1], \
((const char *) (src))[2], ((const char *) (src))[3], \
((const char *) (src))[4], '\0' } }), \
__extension__ ((__STRING2_COPY_ARR7) \
{ { ((const char *) (src))[0], ((const char *) (src))[1], \
((const char *) (src))[2], ((const char *) (src))[3], \
((const char *) (src))[4], ((const char *) (src))[5], \
'\0' } }), \
__extension__ ((__STRING2_COPY_ARR8) \
{ { ((const char *) (src))[0], ((const char *) (src))[1], \
((const char *) (src))[2], ((const char *) (src))[3], \
((const char *) (src))[4], ((const char *) (src))[5], \
((const char *) (src))[6], '\0' } })
# endif
__STRING_INLINE char *__strcpy_small (char *, __STRING2_COPY_ARR2,
__STRING2_COPY_ARR3,
__STRING2_COPY_ARR4,
__STRING2_COPY_ARR5,
__STRING2_COPY_ARR6,
__STRING2_COPY_ARR7,
__STRING2_COPY_ARR8, size_t);
__STRING_INLINE char *
__strcpy_small (char *__dest,
__STRING2_COPY_ARR2 __src2, __STRING2_COPY_ARR3 __src3,
__STRING2_COPY_ARR4 __src4, __STRING2_COPY_ARR5 __src5,
__STRING2_COPY_ARR6 __src6, __STRING2_COPY_ARR7 __src7,
__STRING2_COPY_ARR8 __src8, size_t __srclen)
{
union {
char __c;
__STRING2_COPY_ARR2 __sca2;
__STRING2_COPY_ARR3 __sca3;
__STRING2_COPY_ARR4 __sca4;
__STRING2_COPY_ARR5 __sca5;
__STRING2_COPY_ARR6 __sca6;
__STRING2_COPY_ARR7 __sca7;
__STRING2_COPY_ARR8 __sca8;
} *__u = (void *) __dest;
switch ((unsigned int) __srclen)
{
case 1:
__u->__c = '\0';
break;
case 2:
__extension__ __u->__sca2 = __src2;
break;
case 3:
__extension__ __u->__sca3 = __src3;
break;
case 4:
__extension__ __u->__sca4 = __src4;
break;
case 5:
__extension__ __u->__sca5 = __src5;
break;
case 6:
__extension__ __u->__sca6 = __src6;
break;
case 7:
__extension__ __u->__sca7 = __src7;
break;
case 8:
__extension__ __u->__sca8 = __src8;
break;
}
return __dest;
}
# endif
#endif
/* Copy SRC to DEST, returning pointer to final NUL byte. */
#ifdef __USE_GNU
# if !defined _HAVE_STRING_ARCH_stpcpy || defined _FORCE_INLINES
# ifndef _HAVE_STRING_ARCH_stpcpy
# if __GNUC_PREREQ (3, 4)
# define __stpcpy(dest, src) __builtin_stpcpy (dest, src)
# elif __GNUC_PREREQ (3, 0)
# define __stpcpy(dest, src) \
(__extension__ (__builtin_constant_p (src) \
? (__string2_1bptr_p (src) && strlen (src) + 1 <= 8 \
? __builtin_strcpy (dest, src) + strlen (src) \
: ((char *) (__mempcpy) (dest, src, strlen (src) + 1) \
- 1)) \
: __stpcpy (dest, src)))
# else
# define __stpcpy(dest, src) \
(__extension__ (__builtin_constant_p (src) \
? (__string2_1bptr_p (src) && strlen (src) + 1 <= 8 \
? __stpcpy_small (dest, __stpcpy_args (src), \
strlen (src) + 1) \
: ((char *) (__mempcpy) (dest, src, strlen (src) + 1) \
- 1)) \
: __stpcpy (dest, src)))
# endif
/* In glibc we use this function frequently but for namespace reasons
we have to use the name `__stpcpy'. */
# define stpcpy(dest, src) __stpcpy (dest, src)
# endif
# if !__GNUC_PREREQ (3, 0) || defined _FORCE_INLINES
# if _STRING_ARCH_unaligned
# ifndef _FORCE_INLINES
# define __stpcpy_args(src) \
__extension__ __STRING2_SMALL_GET16 (src, 0), \
__extension__ __STRING2_SMALL_GET16 (src, 4), \
__extension__ __STRING2_SMALL_GET32 (src, 0), \
__extension__ __STRING2_SMALL_GET32 (src, 4)
# endif
__STRING_INLINE char *__stpcpy_small (char *, __uint16_t, __uint16_t,
__uint32_t, __uint32_t, size_t);
__STRING_INLINE char *
__stpcpy_small (char *__dest,
__uint16_t __src0_2, __uint16_t __src4_2,
__uint32_t __src0_4, __uint32_t __src4_4,
size_t __srclen)
{
union {
unsigned int __ui;
unsigned short int __usi;
unsigned char __uc;
char __c;
} *__u = (void *) __dest;
switch ((unsigned int) __srclen)
{
case 1:
__u->__uc = '\0';
break;
case 2:
__u->__usi = __src0_2;
__u = __extension__ ((void *) __u + 1);
break;
case 3:
__u->__usi = __src0_2;
__u = __extension__ ((void *) __u + 2);
__u->__uc = '\0';
break;
case 4:
__u->__ui = __src0_4;
__u = __extension__ ((void *) __u + 3);
break;
case 5:
__u->__ui = __src0_4;
__u = __extension__ ((void *) __u + 4);
__u->__uc = '\0';
break;
case 6:
__u->__ui = __src0_4;
__u = __extension__ ((void *) __u + 4);
__u->__usi = __src4_2;
__u = __extension__ ((void *) __u + 1);
break;
case 7:
__u->__ui = __src0_4;
__u = __extension__ ((void *) __u + 4);
__u->__usi = __src4_2;
__u = __extension__ ((void *) __u + 2);
__u->__uc = '\0';
break;
case 8:
__u->__ui = __src0_4;
__u = __extension__ ((void *) __u + 4);
__u->__ui = __src4_4;
__u = __extension__ ((void *) __u + 3);
break;
}
return &__u->__c;
}
# else
# ifndef _FORCE_INLINES
# define __stpcpy_args(src) \
__extension__ ((__STRING2_COPY_ARR2) \
{ { ((const char *) (src))[0], '\0' } }), \
__extension__ ((__STRING2_COPY_ARR3) \
{ { ((const char *) (src))[0], ((const char *) (src))[1], \
'\0' } }), \
__extension__ ((__STRING2_COPY_ARR4) \
{ { ((const char *) (src))[0], ((const char *) (src))[1], \
((const char *) (src))[2], '\0' } }), \
__extension__ ((__STRING2_COPY_ARR5) \
{ { ((const char *) (src))[0], ((const char *) (src))[1], \
((const char *) (src))[2], ((const char *) (src))[3], \
'\0' } }), \
__extension__ ((__STRING2_COPY_ARR6) \
{ { ((const char *) (src))[0], ((const char *) (src))[1], \
((const char *) (src))[2], ((const char *) (src))[3], \
((const char *) (src))[4], '\0' } }), \
__extension__ ((__STRING2_COPY_ARR7) \
{ { ((const char *) (src))[0], ((const char *) (src))[1], \
((const char *) (src))[2], ((const char *) (src))[3], \
((const char *) (src))[4], ((const char *) (src))[5], \
'\0' } }), \
__extension__ ((__STRING2_COPY_ARR8) \
{ { ((const char *) (src))[0], ((const char *) (src))[1], \
((const char *) (src))[2], ((const char *) (src))[3], \
((const char *) (src))[4], ((const char *) (src))[5], \
((const char *) (src))[6], '\0' } })
# endif
__STRING_INLINE char *__stpcpy_small (char *, __STRING2_COPY_ARR2,
__STRING2_COPY_ARR3,
__STRING2_COPY_ARR4,
__STRING2_COPY_ARR5,
__STRING2_COPY_ARR6,
__STRING2_COPY_ARR7,
__STRING2_COPY_ARR8, size_t);
__STRING_INLINE char *
__stpcpy_small (char *__dest,
__STRING2_COPY_ARR2 __src2, __STRING2_COPY_ARR3 __src3,
__STRING2_COPY_ARR4 __src4, __STRING2_COPY_ARR5 __src5,
__STRING2_COPY_ARR6 __src6, __STRING2_COPY_ARR7 __src7,
__STRING2_COPY_ARR8 __src8, size_t __srclen)
{
union {
char __c;
__STRING2_COPY_ARR2 __sca2;
__STRING2_COPY_ARR3 __sca3;
__STRING2_COPY_ARR4 __sca4;
__STRING2_COPY_ARR5 __sca5;
__STRING2_COPY_ARR6 __sca6;
__STRING2_COPY_ARR7 __sca7;
__STRING2_COPY_ARR8 __sca8;
} *__u = (void *) __dest;
switch ((unsigned int) __srclen)
{
case 1:
__u->__c = '\0';
break;
case 2:
__extension__ __u->__sca2 = __src2;
break;
case 3:
__extension__ __u->__sca3 = __src3;
break;
case 4:
__extension__ __u->__sca4 = __src4;
break;
case 5:
__extension__ __u->__sca5 = __src5;
break;
case 6:
__extension__ __u->__sca6 = __src6;
break;
case 7:
__extension__ __u->__sca7 = __src7;
break;
case 8:
__extension__ __u->__sca8 = __src8;
break;
}
return __dest + __srclen - 1;
}
# endif
# endif
# endif
#endif
/* Copy no more than N characters of SRC to DEST. */
#ifndef _HAVE_STRING_ARCH_strncpy
# if __GNUC_PREREQ (3, 2)
# define strncpy(dest, src, n) __builtin_strncpy (dest, src, n)
# else
# define strncpy(dest, src, n) \
(__extension__ (__builtin_constant_p (src) && __builtin_constant_p (n) \
? (strlen (src) + 1 >= ((size_t) (n)) \
? (char *) memcpy (dest, src, n) \
: strncpy (dest, src, n)) \
: strncpy (dest, src, n)))
# endif
#endif
/* Append no more than N characters from SRC onto DEST. */
#ifndef _HAVE_STRING_ARCH_strncat
# ifdef _USE_STRING_ARCH_strchr
# define strncat(dest, src, n) \
(__extension__ ({ char *__dest = (dest); \
__builtin_constant_p (src) && __builtin_constant_p (n) \
? (strlen (src) < ((size_t) (n)) \
? strcat (__dest, src) \
: (*((char *) __mempcpy (strchr (__dest, '\0'), \
src, n)) = '\0', __dest)) \
: strncat (dest, src, n); }))
# elif __GNUC_PREREQ (3, 2)
# define strncat(dest, src, n) __builtin_strncat (dest, src, n)
# else
# define strncat(dest, src, n) \
(__extension__ (__builtin_constant_p (src) && __builtin_constant_p (n) \
? (strlen (src) < ((size_t) (n)) \
? strcat (dest, src) \
: strncat (dest, src, n)) \
: strncat (dest, src, n)))
# endif
#endif
/* Compare characters of S1 and S2. */
#ifndef _HAVE_STRING_ARCH_strcmp
# if __GNUC_PREREQ (3, 2)
# define strcmp(s1, s2) \
__extension__ \
({ size_t __s1_len, __s2_len; \
(__builtin_constant_p (s1) && __builtin_constant_p (s2) \
&& (__s1_len = strlen (s1), __s2_len = strlen (s2), \
(!__string2_1bptr_p (s1) || __s1_len >= 4) \
&& (!__string2_1bptr_p (s2) || __s2_len >= 4)) \
? __builtin_strcmp (s1, s2) \
: (__builtin_constant_p (s1) && __string2_1bptr_p (s1) \
&& (__s1_len = strlen (s1), __s1_len < 4) \
? (__builtin_constant_p (s2) && __string2_1bptr_p (s2) \
? __builtin_strcmp (s1, s2) \
: __strcmp_cg (s1, s2, __s1_len)) \
: (__builtin_constant_p (s2) && __string2_1bptr_p (s2) \
&& (__s2_len = strlen (s2), __s2_len < 4) \
? (__builtin_constant_p (s1) && __string2_1bptr_p (s1) \
? __builtin_strcmp (s1, s2) \
: __strcmp_gc (s1, s2, __s2_len)) \
: __builtin_strcmp (s1, s2)))); })
# else
# define strcmp(s1, s2) \
__extension__ \
({ size_t __s1_len, __s2_len; \
(__builtin_constant_p (s1) && __builtin_constant_p (s2) \
&& (__s1_len = strlen (s1), __s2_len = strlen (s2), \
(!__string2_1bptr_p (s1) || __s1_len >= 4) \
&& (!__string2_1bptr_p (s2) || __s2_len >= 4)) \
? memcmp ((const char *) (s1), (const char *) (s2), \
(__s1_len < __s2_len ? __s1_len : __s2_len) + 1) \
: (__builtin_constant_p (s1) && __string2_1bptr_p (s1) \
&& (__s1_len = strlen (s1), __s1_len < 4) \
? (__builtin_constant_p (s2) && __string2_1bptr_p (s2) \
? __strcmp_cc (s1, s2, __s1_len) \
: __strcmp_cg (s1, s2, __s1_len)) \
: (__builtin_constant_p (s2) && __string2_1bptr_p (s2) \
&& (__s2_len = strlen (s2), __s2_len < 4) \
? (__builtin_constant_p (s1) && __string2_1bptr_p (s1) \
? __strcmp_cc (s1, s2, __s2_len) \
: __strcmp_gc (s1, s2, __s2_len)) \
: strcmp (s1, s2)))); })
# endif
# define __strcmp_cc(s1, s2, l) \
(__extension__ ({ int __result = \
(((const unsigned char *) (const char *) (s1))[0] \
- ((const unsigned char *) (const char *)(s2))[0]); \
if (l > 0 && __result == 0) \
{ \
__result = (((const unsigned char *) \
(const char *) (s1))[1] \
- ((const unsigned char *) \
(const char *) (s2))[1]); \
if (l > 1 && __result == 0) \
{ \
__result = \
(((const unsigned char *) \
(const char *) (s1))[2] \
- ((const unsigned char *) \
(const char *) (s2))[2]); \
if (l > 2 && __result == 0) \
__result = \
(((const unsigned char *) \
(const char *) (s1))[3] \
- ((const unsigned char *) \
(const char *) (s2))[3]); \
} \
} \
__result; }))
# define __strcmp_cg(s1, s2, l1) \
(__extension__ ({ const unsigned char *__s2 = \
(const unsigned char *) (const char *) (s2); \
int __result = \
(((const unsigned char *) (const char *) (s1))[0] \
- __s2[0]); \
if (l1 > 0 && __result == 0) \
{ \
__result = (((const unsigned char *) \
(const char *) (s1))[1] - __s2[1]); \
if (l1 > 1 && __result == 0) \
{ \
__result = (((const unsigned char *) \
(const char *) (s1))[2] - __s2[2]); \
if (l1 > 2 && __result == 0) \
__result = (((const unsigned char *) \
(const char *) (s1))[3] \
- __s2[3]); \
} \
} \
__result; }))
# define __strcmp_gc(s1, s2, l2) (- __strcmp_cg (s2, s1, l2))
#endif
/* Compare N characters of S1 and S2. */
#ifndef _HAVE_STRING_ARCH_strncmp
# define strncmp(s1, s2, n) \
(__extension__ (__builtin_constant_p (n) \
&& ((__builtin_constant_p (s1) \
&& strlen (s1) < ((size_t) (n))) \
|| (__builtin_constant_p (s2) \
&& strlen (s2) < ((size_t) (n)))) \
? strcmp (s1, s2) : strncmp (s1, s2, n)))
#endif
/* Return the length of the initial segment of S which
consists entirely of characters not in REJECT. */
#if !defined _HAVE_STRING_ARCH_strcspn || defined _FORCE_INLINES
# ifndef _HAVE_STRING_ARCH_strcspn
# if __GNUC_PREREQ (3, 2)
# define strcspn(s, reject) \
__extension__ \
({ char __r0, __r1, __r2; \
(__builtin_constant_p (reject) && __string2_1bptr_p (reject) \
? ((__builtin_constant_p (s) && __string2_1bptr_p (s)) \
? __builtin_strcspn (s, reject) \
: ((__r0 = ((const char *) (reject))[0], __r0 == '\0') \
? strlen (s) \
: ((__r1 = ((const char *) (reject))[1], __r1 == '\0') \
? __strcspn_c1 (s, __r0) \
: ((__r2 = ((const char *) (reject))[2], __r2 == '\0') \
? __strcspn_c2 (s, __r0, __r1) \
: (((const char *) (reject))[3] == '\0' \
? __strcspn_c3 (s, __r0, __r1, __r2) \
: __builtin_strcspn (s, reject)))))) \
: __builtin_strcspn (s, reject)); })
# else
# define strcspn(s, reject) \
__extension__ \
({ char __r0, __r1, __r2; \
(__builtin_constant_p (reject) && __string2_1bptr_p (reject) \
? ((__r0 = ((const char *) (reject))[0], __r0 == '\0') \
? strlen (s) \
: ((__r1 = ((const char *) (reject))[1], __r1 == '\0') \
? __strcspn_c1 (s, __r0) \
: ((__r2 = ((const char *) (reject))[2], __r2 == '\0') \
? __strcspn_c2 (s, __r0, __r1) \
: (((const char *) (reject))[3] == '\0' \
? __strcspn_c3 (s, __r0, __r1, __r2) \
: strcspn (s, reject))))) \
: strcspn (s, reject)); })
# endif
# endif
__STRING_INLINE size_t __strcspn_c1 (const char *__s, int __reject);
__STRING_INLINE size_t
__strcspn_c1 (const char *__s, int __reject)
{
size_t __result = 0;
while (__s[__result] != '\0' && __s[__result] != __reject)
++__result;
return __result;
}
__STRING_INLINE size_t __strcspn_c2 (const char *__s, int __reject1,
int __reject2);
__STRING_INLINE size_t
__strcspn_c2 (const char *__s, int __reject1, int __reject2)
{
size_t __result = 0;
while (__s[__result] != '\0' && __s[__result] != __reject1
&& __s[__result] != __reject2)
++__result;
return __result;
}
__STRING_INLINE size_t __strcspn_c3 (const char *__s, int __reject1,
int __reject2, int __reject3);
__STRING_INLINE size_t
__strcspn_c3 (const char *__s, int __reject1, int __reject2,
int __reject3)
{
size_t __result = 0;
while (__s[__result] != '\0' && __s[__result] != __reject1
&& __s[__result] != __reject2 && __s[__result] != __reject3)
++__result;
return __result;
}
#endif
/* Return the length of the initial segment of S which
consists entirely of characters in ACCEPT. */
#if !defined _HAVE_STRING_ARCH_strspn || defined _FORCE_INLINES
# ifndef _HAVE_STRING_ARCH_strspn
# if __GNUC_PREREQ (3, 2)
# define strspn(s, accept) \
__extension__ \
({ char __a0, __a1, __a2; \
(__builtin_constant_p (accept) && __string2_1bptr_p (accept) \
? ((__builtin_constant_p (s) && __string2_1bptr_p (s)) \
? __builtin_strspn (s, accept) \
: ((__a0 = ((const char *) (accept))[0], __a0 == '\0') \
? ((void) (s), (size_t) 0) \
: ((__a1 = ((const char *) (accept))[1], __a1 == '\0') \
? __strspn_c1 (s, __a0) \
: ((__a2 = ((const char *) (accept))[2], __a2 == '\0') \
? __strspn_c2 (s, __a0, __a1) \
: (((const char *) (accept))[3] == '\0' \
? __strspn_c3 (s, __a0, __a1, __a2) \
: __builtin_strspn (s, accept)))))) \
: __builtin_strspn (s, accept)); })
# else
# define strspn(s, accept) \
__extension__ \
({ char __a0, __a1, __a2; \
(__builtin_constant_p (accept) && __string2_1bptr_p (accept) \
? ((__a0 = ((const char *) (accept))[0], __a0 == '\0') \
? ((void) (s), (size_t) 0) \
: ((__a1 = ((const char *) (accept))[1], __a1 == '\0') \
? __strspn_c1 (s, __a0) \
: ((__a2 = ((const char *) (accept))[2], __a2 == '\0') \
? __strspn_c2 (s, __a0, __a1) \
: (((const char *) (accept))[3] == '\0' \
? __strspn_c3 (s, __a0, __a1, __a2) \
: strspn (s, accept))))) \
: strspn (s, accept)); })
# endif
# endif
__STRING_INLINE size_t __strspn_c1 (const char *__s, int __accept);
__STRING_INLINE size_t
__strspn_c1 (const char *__s, int __accept)
{
size_t __result = 0;
/* Please note that __accept never can be '\0'. */
while (__s[__result] == __accept)
++__result;
return __result;
}
__STRING_INLINE size_t __strspn_c2 (const char *__s, int __accept1,
int __accept2);
__STRING_INLINE size_t
__strspn_c2 (const char *__s, int __accept1, int __accept2)
{
size_t __result = 0;
/* Please note that __accept1 and __accept2 never can be '\0'. */
while (__s[__result] == __accept1 || __s[__result] == __accept2)
++__result;
return __result;
}
__STRING_INLINE size_t __strspn_c3 (const char *__s, int __accept1,
int __accept2, int __accept3);
__STRING_INLINE size_t
__strspn_c3 (const char *__s, int __accept1, int __accept2, int __accept3)
{
size_t __result = 0;
/* Please note that __accept1 to __accept3 never can be '\0'. */
while (__s[__result] == __accept1 || __s[__result] == __accept2
|| __s[__result] == __accept3)
++__result;
return __result;
}
#endif
/* Find the first occurrence in S of any character in ACCEPT. */
#if !defined _HAVE_STRING_ARCH_strpbrk || defined _FORCE_INLINES
# ifndef _HAVE_STRING_ARCH_strpbrk
# if __GNUC_PREREQ (3, 2)
# define strpbrk(s, accept) \
__extension__ \
({ char __a0, __a1, __a2; \
(__builtin_constant_p (accept) && __string2_1bptr_p (accept) \
? ((__builtin_constant_p (s) && __string2_1bptr_p (s)) \
? __builtin_strpbrk (s, accept) \
: ((__a0 = ((const char *) (accept))[0], __a0 == '\0') \
? ((void) (s), (char *) NULL) \
: ((__a1 = ((const char *) (accept))[1], __a1 == '\0') \
? __builtin_strchr (s, __a0) \
: ((__a2 = ((const char *) (accept))[2], __a2 == '\0') \
? __strpbrk_c2 (s, __a0, __a1) \
: (((const char *) (accept))[3] == '\0' \
? __strpbrk_c3 (s, __a0, __a1, __a2) \
: __builtin_strpbrk (s, accept)))))) \
: __builtin_strpbrk (s, accept)); })
# else
# define strpbrk(s, accept) \
__extension__ \
({ char __a0, __a1, __a2; \
(__builtin_constant_p (accept) && __string2_1bptr_p (accept) \
? ((__a0 = ((const char *) (accept))[0], __a0 == '\0') \
? ((void) (s), (char *) NULL) \
: ((__a1 = ((const char *) (accept))[1], __a1 == '\0') \
? strchr (s, __a0) \
: ((__a2 = ((const char *) (accept))[2], __a2 == '\0') \
? __strpbrk_c2 (s, __a0, __a1) \
: (((const char *) (accept))[3] == '\0' \
? __strpbrk_c3 (s, __a0, __a1, __a2) \
: strpbrk (s, accept))))) \
: strpbrk (s, accept)); })
# endif
# endif
__STRING_INLINE char *__strpbrk_c2 (const char *__s, int __accept1,
int __accept2);
__STRING_INLINE char *
__strpbrk_c2 (const char *__s, int __accept1, int __accept2)
{
/* Please note that __accept1 and __accept2 never can be '\0'. */
while (*__s != '\0' && *__s != __accept1 && *__s != __accept2)
++__s;
return *__s == '\0' ? NULL : (char *) (size_t) __s;
}
__STRING_INLINE char *__strpbrk_c3 (const char *__s, int __accept1,
int __accept2, int __accept3);
__STRING_INLINE char *
__strpbrk_c3 (const char *__s, int __accept1, int __accept2, int __accept3)
{
/* Please note that __accept1 to __accept3 never can be '\0'. */
while (*__s != '\0' && *__s != __accept1 && *__s != __accept2
&& *__s != __accept3)
++__s;
return *__s == '\0' ? NULL : (char *) (size_t) __s;
}
#endif
/* Find the first occurrence of NEEDLE in HAYSTACK. Newer gcc versions
do this itself. */
#if !defined _HAVE_STRING_ARCH_strstr && !__GNUC_PREREQ (2, 97)
# define strstr(haystack, needle) \
(__extension__ (__builtin_constant_p (needle) && __string2_1bptr_p (needle) \
? (((const char *) (needle))[0] == '\0' \
? (char *) (size_t) (haystack) \
: (((const char *) (needle))[1] == '\0' \
? strchr (haystack, \
((const char *) (needle))[0]) \
: strstr (haystack, needle))) \
: strstr (haystack, needle)))
#endif
#if !defined _HAVE_STRING_ARCH_strtok_r || defined _FORCE_INLINES
# ifndef _HAVE_STRING_ARCH_strtok_r
# define __strtok_r(s, sep, nextp) \
(__extension__ (__builtin_constant_p (sep) && __string2_1bptr_p (sep) \
&& ((const char *) (sep))[0] != '\0' \
&& ((const char *) (sep))[1] == '\0' \
? __strtok_r_1c (s, ((const char *) (sep))[0], nextp) \
: __strtok_r (s, sep, nextp)))
# endif
__STRING_INLINE char *__strtok_r_1c (char *__s, char __sep, char **__nextp);
__STRING_INLINE char *
__strtok_r_1c (char *__s, char __sep, char **__nextp)
{
char *__result;
if (__s == NULL)
__s = *__nextp;
while (*__s == __sep)
++__s;
__result = NULL;
if (*__s != '\0')
{
__result = __s++;
while (*__s != '\0')
if (*__s++ == __sep)
{
__s[-1] = '\0';
break;
}
}
*__nextp = __s;
return __result;
}
# ifdef __USE_POSIX
# define strtok_r(s, sep, nextp) __strtok_r (s, sep, nextp)
# endif
#endif
#if !defined _HAVE_STRING_ARCH_strsep || defined _FORCE_INLINES
# ifndef _HAVE_STRING_ARCH_strsep
extern char *__strsep_g (char **__stringp, const char *__delim);
# define __strsep(s, reject) \
__extension__ \
({ char __r0, __r1, __r2; \
(__builtin_constant_p (reject) && __string2_1bptr_p (reject) \
&& (__r0 = ((const char *) (reject))[0], \
((const char *) (reject))[0] != '\0') \
? ((__r1 = ((const char *) (reject))[1], \
((const char *) (reject))[1] == '\0') \
? __strsep_1c (s, __r0) \
: ((__r2 = ((const char *) (reject))[2], __r2 == '\0') \
? __strsep_2c (s, __r0, __r1) \
: (((const char *) (reject))[3] == '\0' \
? __strsep_3c (s, __r0, __r1, __r2) \
: __strsep_g (s, reject)))) \
: __strsep_g (s, reject)); })
# endif
__STRING_INLINE char *__strsep_1c (char **__s, char __reject);
__STRING_INLINE char *
__strsep_1c (char **__s, char __reject)
{
char *__retval = *__s;
if (__retval != NULL && (*__s = strchr (__retval, __reject)) != NULL)
*(*__s)++ = '\0';
return __retval;
}
__STRING_INLINE char *__strsep_2c (char **__s, char __reject1, char __reject2);
__STRING_INLINE char *
__strsep_2c (char **__s, char __reject1, char __reject2)
{
char *__retval = *__s;
if (__retval != NULL)
{
char *__cp = __retval;
while (1)
{
if (*__cp == '\0')
{
__cp = NULL;
break;
}
if (*__cp == __reject1 || *__cp == __reject2)
{
*__cp++ = '\0';
break;
}
++__cp;
}
*__s = __cp;
}
return __retval;
}
__STRING_INLINE char *__strsep_3c (char **__s, char __reject1, char __reject2,
char __reject3);
__STRING_INLINE char *
__strsep_3c (char **__s, char __reject1, char __reject2, char __reject3)
{
char *__retval = *__s;
if (__retval != NULL)
{
char *__cp = __retval;
while (1)
{
if (*__cp == '\0')
{
__cp = NULL;
break;
}
if (*__cp == __reject1 || *__cp == __reject2 || *__cp == __reject3)
{
*__cp++ = '\0';
break;
}
++__cp;
}
*__s = __cp;
}
return __retval;
}
# ifdef __USE_MISC
# define strsep(s, reject) __strsep (s, reject)
# endif
#endif
/* We need the memory allocation functions for inline strdup().
Referring to stdlib.h (even minimally) is not allowed
in any of the tight standards compliant modes. */
#ifdef __USE_MISC
# if !defined _HAVE_STRING_ARCH_strdup || !defined _HAVE_STRING_ARCH_strndup
# define __need_malloc_and_calloc
# include <stdlib.h>
# endif
# ifndef _HAVE_STRING_ARCH_strdup
extern char *__strdup (const char *__string) __THROW __attribute_malloc__;
# define __strdup(s) \
(__extension__ (__builtin_constant_p (s) && __string2_1bptr_p (s) \
? (((const char *) (s))[0] == '\0' \
? (char *) calloc ((size_t) 1, (size_t) 1) \
: ({ size_t __len = strlen (s) + 1; \
char *__retval = (char *) malloc (__len); \
if (__retval != NULL) \
__retval = (char *) memcpy (__retval, s, __len); \
__retval; })) \
: __strdup (s)))
# if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
# define strdup(s) __strdup (s)
# endif
# endif
# ifndef _HAVE_STRING_ARCH_strndup
extern char *__strndup (const char *__string, size_t __n)
__THROW __attribute_malloc__;
# define __strndup(s, n) \
(__extension__ (__builtin_constant_p (s) && __string2_1bptr_p (s) \
? (((const char *) (s))[0] == '\0' \
? (char *) calloc ((size_t) 1, (size_t) 1) \
: ({ size_t __len = strlen (s) + 1; \
size_t __n = (n); \
char *__retval; \
if (__n < __len) \
__len = __n + 1; \
__retval = (char *) malloc (__len); \
if (__retval != NULL) \
{ \
__retval[__len - 1] = '\0'; \
__retval = (char *) memcpy (__retval, s, \
__len - 1); \
} \
__retval; })) \
: __strndup (s, n)))
# ifdef __USE_XOPEN2K8
# define strndup(s, n) __strndup (s, n)
# endif
# endif
#endif /* Use misc. or use GNU. */
#ifndef _FORCE_INLINES
# undef __STRING_INLINE
#endif
#endif /* No string inlines. */
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