strlen-c/1

#include <stdint.h>

char *  ptr1 = "jan";
char *  ptr2 = "kowalski";

int strlen(char *s)
{
     char *p = s;
     while (*p != '\0')
     p++;
     return p - s;
}

void strcpy(char *s, char *t)
{
     while (*s++ = *t++);
}


#define ALLOCSIZE 10000

static char allocbuf[ALLOCSIZE]; 
static char *allocp = allocbuf; 

char *alloc(int n) 
{
    /*
    if (n % 4 != 0) { 
        n += 4 - (n % 4);
    }
    */

     if (allocbuf + ALLOCSIZE - allocp >= n) { 
     allocp += n;
     return allocp - n; 
     } else 
     return 0;
}

int main()  {

        char *  p1 = alloc(strlen(ptr1)); 
        strcpy (p1, ptr1);
        asm("nop");
         
        char *  p2 = alloc(strlen(ptr2)); 
        strcpy (p2, ptr2);
        asm("nop");
    return 1;
}