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/* Copyright (c) 2009 Corinna Vinschen <corinna@vinschen.de> */
#include "../ctype/local.h"
/* internal function to compute width of wide char. */
int __wcwidth(wint_t);
/* Reentrant version of strerror. */
char *_strerror_r(int, int, int *);
/* Nonzero if X is not aligned on a "long" boundary.
* This macro is used to skip a few bytes to find an aligned pointer.
* It's better to keep it as is even if _HAVE_HW_MISALIGNED_ACCESS is enabled,
* to avoid small performance penalties (if they are not zero). */
#define UNALIGNED_X(X) ((uintptr_t)(X) & (sizeof(unsigned long) - 1))
/* Nonzero if either X or Y is not aligned on a "long" boundary. */
#define UNALIGNED_X_Y(X, Y) \
(((uintptr_t)(X) & (sizeof(unsigned long) - 1)) \
| ((uintptr_t)(Y) & (sizeof(unsigned long) - 1)))
/* How many bytes are copied each iteration of the word copy loop. */
#define LITTLE_BLOCK_SIZE (sizeof(unsigned long))
/* How many bytes are copied each iteration of the 4X unrolled loop. */
#define BIG_BLOCK_SIZE (sizeof(unsigned long) << 2)
/* Threshhold for punting to the little block byte copier. */
#define TOO_SMALL_LITTLE_BLOCK(LEN) ((LEN) < LITTLE_BLOCK_SIZE)
/* Threshhold for punting to the big block byte copier. */
#define TOO_SMALL_BIG_BLOCK(LEN) ((LEN) < BIG_BLOCK_SIZE)
/* Macros for detecting endchar. */
#if ULONG_MAX == 4294967295UL
#define DETECT_NULL(X) (((X) - 0x01010101UL) & ~(X) & 0x80808080UL)
#elif ULONG_MAX == 18446744073709551615UL
/* Nonzero if X (a long int) contains a NULL byte. */
#define DETECT_NULL(X) (((X) - 0x0101010101010101UL) & ~(X) & 0x8080808080808080UL)
#else
#error long int is not a 32bit or 64bit type.
#endif
/* Returns nonzero if (unsigned long)X contains the byte used to fill (unsigned long)MASK. */
#define DETECT_CHAR(X, MASK) (DETECT_NULL(X ^ MASK))
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