1 #include <u.h> 2 #include <libc.h> 3 #include "String.h" 4 5 void 6 s_putc(String *s, int c) 7 { 8 if(s->ref > 1) 9 sysfatal("can't s_putc a shared string"); 10 if (s->ptr >= s->end) 11 s_grow(s, 2); 12 *(s->ptr)++ = c; 13 } 14