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    #ifndef _LINUX_STRING_H_
    #define _LINUX_STRING_H_
    
    #include <linux/types.h>	/* for size_t */
    #include <linux/stddef.h>	/* for NULL */
    
    #ifdef __cplusplus
    extern "C" {
    #endif
    
    extern char * ___strtok;
    extern char * strpbrk(const char *,const char *);
    extern char * strtok(char *,const char *);
    extern char * strsep(char **,const char *);
    extern __kernel_size_t strspn(const char *,const char *);
    
    
    /*
     * Include machine specific inline routines
     */
    #include <asm/string.h>
    
    #ifndef __HAVE_ARCH_STRCPY
    extern char * strcpy(char *,const char *);
    #endif
    #ifndef __HAVE_ARCH_STRNCPY
    extern char * strncpy(char *,const char *, __kernel_size_t);
    #endif
    #ifndef __HAVE_ARCH_STRCAT
    extern char * strcat(char *, const char *);
    #endif
    #ifndef __HAVE_ARCH_STRNCAT
    extern char * strncat(char *, const char *, __kernel_size_t);
    #endif
    #ifndef __HAVE_ARCH_STRCMP
    extern int strcmp(const char *,const char *);
    #endif
    #ifndef __HAVE_ARCH_STRNCMP
    extern int strncmp(const char *,const char *,__kernel_size_t);
    #endif
    #ifndef __HAVE_ARCH_STRNICMP
    extern int strnicmp(const char *, const char *, __kernel_size_t);
    #endif
    #ifndef __HAVE_ARCH_STRCHR
    extern char * strchr(const char *,int);
    #endif
    #ifndef __HAVE_ARCH_STRRCHR
    extern char * strrchr(const char *,int);
    #endif
    #ifndef __HAVE_ARCH_STRSTR
    extern char * strstr(const char *,const char *);
    #endif
    #ifndef __HAVE_ARCH_STRLEN
    extern __kernel_size_t strlen(const char *);
    #endif
    #ifndef __HAVE_ARCH_STRNLEN
    extern __kernel_size_t strnlen(const char *,__kernel_size_t);
    #endif
    #ifndef __HAVE_ARCH_STRDUP
    extern char * strdup(const char *);
    #endif
    
    #ifndef __HAVE_ARCH_MEMSET
    extern void * memset(void *,int,__kernel_size_t);
    #endif
    #ifndef __HAVE_ARCH_MEMCPY
    extern void * memcpy(void *,const void *,__kernel_size_t);
    #endif
    #ifndef __HAVE_ARCH_MEMMOVE
    extern void * memmove(void *,const void *,__kernel_size_t);
    #endif
    #ifndef __HAVE_ARCH_MEMSCAN
    extern void * memscan(void *,int,__kernel_size_t);
    #endif
    #ifndef __HAVE_ARCH_MEMCMP
    extern int memcmp(const void *,const void *,__kernel_size_t);
    #endif
    #ifndef __HAVE_ARCH_MEMCHR
    extern void * memchr(const void *,int,__kernel_size_t);
    #endif
    
    #ifdef __cplusplus
    }
    #endif
    
    #endif /* _LINUX_STRING_H_ */