stackblocksize
while (stackblocksize() < len)
while (stackblocksize() <= len)
int len = stackblocksize();
sstrnleft = stackblocksize() - len - 1;
int len = stackblocksize() - sstrnleft;
sstrnleft = stackblocksize() - len;
#define STARTSTACKSTR(p) p = stackblock(), sstrnleft = stackblocksize()
while (stackblocksize() <= savelen)
(void) stalloc(stackblocksize());
(void) stalloc(stackblocksize());