232       fle thisblock = *nextfree;  in free()  local
233       if ((size_t)thisblock + thisblock->size == (size_t) block)  in free()
235 	  thisblock->size += block->size;  in free()
237 	      && thisblock->next  in free()
238 	      && (size_t) block + block->size == (size_t) thisblock->next)  in free()
240 	      thisblock->size += thisblock->next->size;  in free()
241 	      thisblock->next = thisblock->next->next;  in free()
245       else if ((size_t) thisblock == (size_t) block + block->size)  in free()
248 	      && thisblock->next  in free()
249 	      && (size_t) block == ((size_t) thisblock->next   in free()
250 				    + thisblock->next->size))  in free()
252 	      *nextfree = thisblock->next;  in free()
253 	      thisblock->next->size += block->size + thisblock->size;  in free()
257 	      block->size += thisblock->size;  in free()
258 	      block->next = thisblock->next;  in free()
264 		&& (size_t) thisblock > (size_t) block)  in free()
266 		   && (size_t) thisblock < (size_t) block))  in free()