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#include <stddef.h>
void *xmalloc(size_t sz);
void *xrealloc(void *p, size_t sz);
char *xstrdup(const char *src);
int kernel_version(void);
#define KRELEASE(maj,min,patch) ((maj) * 10000 + (min)*1000 + (patch))
long ticks_per_second(void);
int nstrcmp(const char *, const char *);
char *safe_strncpy(char *dst, const char *src, size_t size);
#define netmin(a,b) ((a)<(b) ? (a) : (b))
#define netmax(a,b) ((a)>(b) ? (a) : (b))
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
/* Positions count starting from 1. */
#define attribute_printf(fmtpos, varpos) \
__attribute__((__format__(__printf__, fmtpos, varpos)))
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