- ret = stack[n - 1];
- }
- return ret;
-}
-
-double length ()
-{
- return stack_size;
-}
-
-double pop ()
-{
- double ret = 0;
- if (stack_size > 0) {
- ret = stack[--stack_size];
- double *tmp = (double *) callocordie (stack_size, sizeof (double));
- memcpy (tmp, stack, stack_size * sizeof (double));
- free (stack);
- stack = tmp;
- } else {
- VERBOSE (WARNING, fprintf (stdout, "error stack empty\n"));
- }
- return ret;
-}
-
-double push (double val)
-{
- double *tmp = (double *) callocordie (stack_size + 1, sizeof (double));
- memcpy (tmp, stack, stack_size * sizeof (double));
- if (stack) {
- free (stack);
- }
- stack = tmp;
- stack[stack_size++] = val;
- return val;
-}
-
-double put (int n, double val)
-{
- if (n <= 0) {
- VERBOSE (WARNING, fprintf (stdout, "error out of bound (%d/%d)\n", n, stack_size));
- return 0;
- }
- if (n > stack_size) {
- double *tmp = (double *) callocordie (n, sizeof (double));
- memcpy (tmp, stack, stack_size * sizeof (double));
- free (stack);
- stack = tmp;
- stack_size = n;
- }
- stack[n - 1] = val;
- return val;
-}
-
-double set (int nbops, element_t **ops)
-{
- int i;
- if (stack) {
- free (stack);
- }
- stack = NULL;
- stack_size = 0;
- if (nbops != 0) {
- stack = (double *) callocordie (nbops, sizeof (double));
- for (i = 0; i < nbops; i++) {
- stack[i] = evaluate_element (ops[i], 0);
- }
- stack_size = nbops;
- }
- return stack_size;
-}
-
-void show (void)
-{
- int i;
- fprintf (stdout, "stack:");
- for (i = 0; i < stack_size; i++) {
- fprintf (stdout, " ");
- fprintf (stdout, minform, stack[i]);
- }
- fprintf (stdout, "\n");
-}
-
-/* stack functions */
-
-double max ()
-{
- double ret = 0;
- int i;
- if (stack_size < 1) {
- VERBOSE (WARNING, fprintf (stdout, "error not enough element in stack (%d)\n", stack_size));
- return 0;
- }
- ret = stack[0];
- for (i = 1; i < stack_size; i++) {
- if (stack[i] > ret) {
- ret = stack[i];
- }
- }
- return ret;
-}
-
-double mean ()
-{
- double ret = 0;
- int i;
- if (stack_size < 1) {
- VERBOSE (WARNING, fprintf (stdout, "error not enough element in stack (%d)\n", stack_size));
- return 0;
- }
- for (i = 0; i < stack_size; i++) {
- ret += stack[i];
- }
- return ret / stack_size;
-}
-
-double min ()
-{
- double ret = 0;
- int i;
- if (stack_size < 1) {
- VERBOSE (WARNING, fprintf (stdout, "error not enough element in stack (%d)\n", stack_size));
- return 0;
- }
- ret = stack[0];
- for (i = 1; i < stack_size; i++) {
- if (stack[i] < ret) {
- ret = stack[i];
- }
- }
- return ret;
-}
-
-void order ()
-{
- int i, j;
- if (stack_size < 1) {
- VERBOSE (WARNING, fprintf (stdout, "error not enough element in stack (%d)\n", stack_size));
- return;
- }
- for (i = 0; i < stack_size - 1; i++) {
- int done = 0;
- for (j = 0; j < stack_size - 1; j++) {
- if (stack[j] > stack[j + 1]) {
- double tmp = stack[j];
- stack[j] = stack[j + 1];
- stack[j + 1] = tmp;
- done = 1;
- }
- }
- if (done == 0) {
- break;
- }
- }
-}
-
-double median ()
-{
- double ret = 0;
- if (stack_size < 3) {
- VERBOSE (WARNING, fprintf (stdout, "error not enough element in stack (%d)\n", stack_size));
- return 0;
- }
- double *tmp = (double *) callocordie (stack_size, sizeof (double));
- memcpy (tmp, stack, stack_size * sizeof (double));
- order ();
- ret = stack[(stack_size - 1)/ 2];
- memcpy (stack, tmp, stack_size * sizeof (double));
- free (tmp);
- return ret;
-}
-
-double prod ()
-{
- double ret = 1;
- int i;
- if (stack_size < 1) {
- VERBOSE (WARNING, fprintf (stdout, "error not enough element in stack (%d)\n", stack_size));
- return 0;
- }
- for (i = 0; i < stack_size; i++) {
- ret *= stack[i];
- }
- return ret;
-}
-
-double sum ()
-{
- double ret = 0;
- int i;
- if (stack_size < 1) {
- VERBOSE (WARNING, fprintf (stdout, "error not enough element in stack (%d)\n", stack_size));
- return 0;
- }
- for (i = 0; i < stack_size; i++) {
- ret += stack[i];
- }
- return ret;
-}
-
-double variance ()
-{
- double ret = 0;
- double m = 0;
- int i;
- if (stack_size < 2) {
- VERBOSE (WARNING, fprintf (stdout, "error not enough element in stack (%d)\n", stack_size));
- return 0;
- }
- m = mean ();
- for (i = 0; i < stack_size; i++) {
- ret += (stack[i] - m) * (stack[i] - m);