Lines Matching refs:st0
117 Stack *st0, *st1, *st2;
121 st0 = stacks;
125 if (st0 == NULL || st0 == st) break;
127 st1 = st0;
128 st0 = st0->next;
130 vg_assert(st0 == st);
131 if (st0 != NULL && st1 != NULL && st2 != NULL) {
133 /* st0 points to st, st1 to its predecessor, and st2 to st1's
134 predecessor. Swap st0 and st1, that is, move st0 one step
137 vg_assert(st1->next == st0);
138 tmp = st0->next;
139 st2->next = st0;
140 st0->next = st1;
144 if (st0 != NULL && st1 != NULL && st2 == NULL) {
147 vg_assert(st1->next == st0);
148 st1->next = st0->next;
149 st0->next = st1;
150 stacks = st0;
