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char *str_cat(char *d, char *s)
{
char *p = d;
while (*d)
d++;
while (*d++ = *s++)
continue;
return p;
}
char *str_cpy(char *d, char *s)
{
char *p = d;
while (*d++ = *s++)
continue;
return p;
}
char a[32];
char b[32];
int main(void)
{
char *c;
/*
* string arguments are aligned in 8-byte boundary including
* 2-byte length prefix so checking strings with length of
* 5, 6 and 7 will be enough.
*/
str_cpy(a, "hello");
str_cpy(b, " world");
c = str_cat(a, b);
str_cpy(a, "goodbye");
c = str_cat(a, b);
return *c ? 0 : 1;
}
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