70 #define STARTSTACKSTR(p)	p = stackblock()  argument
71 #define STPUTC(c, p)	do { if (p == sstrend) p = growstackstr(); *p++ = (c); } while(0)  argument
72 #define CHECKSTRSPACE(n, p)	{ if ((size_t)(sstrend - p) < n) p = makestrspace(n, p); }  argument
73 #define USTPUTC(c, p)	(*p++ = (c))  argument
81 #define STACKSTRNUL(p)	(p == sstrend ? (p = growstackstr(), *p = '\0') : (*p = '\0'))  argument
82 #define STUNPUTC(p)	(--p)  argument
83 #define STTOPC(p)	p[-1]  argument
84 #define STADJUST(amount, p)	(p += (amount))  argument
85 #define grabstackstr(p)	stalloc((char *)p - stackblock())  argument
86 #define ungrabstackstr(s, p)	stunalloc((s))  argument
87 #define STPUTBIN(s, len, p)	p = stputbin((s), (len), p)  argument
88 #define STPUTS(s, p)	p = stputs((s), p)  argument