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#include "string.h"
size_t strlen(const char *str)
{
size_t len = 0;
while(str[len])
len++;
return len;
}
/*
Copy bytes in memory. If copying takes place between objects
that overlap, the behavior is undefined.
*/
void *memcpy(void *dest, const void *src, size_t n)
{
size_t i;
const char *s = src;
char *d = dest;
for(i = 0; i < n; i++)
d[i] = s[i];
return dest;
}
void *memset(void *dest, int c, size_t n)
{
char *d = dest;
while(n--)
*d++ = c;
return dest;
}
/*
Copy bytes in memory with overlapping areas.
*/
void *memmove(void *dest, const void *src, size_t n)
{
const char *s = src;
char *d = dest;
if(dest == src)
return dest;
if(dest < src)
return memcpy(dest, src, n);
while(n--)
d[n] = s[n];
return dest;
}
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