The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/include/asm-alpha/string.h

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    1 #ifndef __ALPHA_STRING_H__
    2 #define __ALPHA_STRING_H__
    3 
    4 #ifdef __KERNEL__
    5 
    6 /*
    7  * GCC of any recent vintage doesn't do stupid things with bcopy.
    8  * EGCS 1.1 knows all about expanding memcpy inline, others don't.
    9  *
   10  * Similarly for a memset with data = 0.
   11  */
   12 
   13 #define __HAVE_ARCH_MEMCPY
   14 extern void * memcpy(void *, const void *, size_t);
   15 #define __HAVE_ARCH_MEMMOVE
   16 extern void * memmove(void *, const void *, size_t);
   17 
   18 /* For backward compatibility with modules.  Unused otherwise.  */
   19 extern void * __memcpy(void *, const void *, size_t);
   20 
   21 #define memcpy __builtin_memcpy
   22 
   23 #define __HAVE_ARCH_MEMSET
   24 extern void * __constant_c_memset(void *, unsigned long, size_t);
   25 extern void * __memset(void *, int, size_t);
   26 extern void * memset(void *, int, size_t);
   27 
   28 #define memset(s, c, n)                                                     \
   29 (__builtin_constant_p(c)                                                    \
   30  ? (__builtin_constant_p(n) && (c) == 0                                     \
   31     ? __builtin_memset((s),0,(n))                                           \
   32     : __constant_c_memset((s),0x0101010101010101UL*(unsigned char)(c),(n))) \
   33  : __memset((s),(c),(n)))
   34 
   35 #define __HAVE_ARCH_STRCPY
   36 extern char * strcpy(char *,const char *);
   37 #define __HAVE_ARCH_STRNCPY
   38 extern char * strncpy(char *, const char *, size_t);
   39 #define __HAVE_ARCH_STRCAT
   40 extern char * strcat(char *, const char *);
   41 #define __HAVE_ARCH_STRNCAT
   42 extern char * strncat(char *, const char *, size_t);
   43 #define __HAVE_ARCH_STRCHR
   44 extern char * strchr(const char *,int);
   45 #define __HAVE_ARCH_STRRCHR
   46 extern char * strrchr(const char *,int);
   47 #define __HAVE_ARCH_STRLEN
   48 extern size_t strlen(const char *);
   49 #define __HAVE_ARCH_MEMCHR
   50 extern void * memchr(const void *, int, size_t);
   51 
   52 /* The following routine is like memset except that it writes 16-bit
   53    aligned values.  The DEST and COUNT parameters must be even for 
   54    correct operation.  */
   55 
   56 #define __HAVE_ARCH_MEMSETW
   57 extern void * __memsetw(void *dest, unsigned short, size_t count);
   58 
   59 #define memsetw(s, c, n)                                                 \
   60 (__builtin_constant_p(c)                                                 \
   61  ? __constant_c_memset((s),0x0001000100010001UL*(unsigned short)(c),(n)) \
   62  : __memsetw((s),(c),(n)))
   63 
   64 extern int strcasecmp(const char *, const char *);
   65 
   66 #endif /* __KERNEL__ */
   67 
   68 #endif /* __ALPHA_STRING_H__ */

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