#include <u.h>
#include <libc.h>
#include "String.h"

void
s_putc(String *s, int c)
{
       if(s->ref > 1)
               sysfatal("can't s_putc a shared string");
       if (s->ptr >= s->end)
               s_grow(s, 2);
       *(s->ptr)++ = c;
}