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zone_map.cu
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zone_map.cu
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/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "zone_map.h"
void process_error(int severity, string err); // this should probably live in a utils header file
bool fh_equal_to(const float_type x, const float_type y)
{
return (((x-y) < EPSILON) && ((x-y) > -EPSILON));
}
bool fh_less(const float_type x, const float_type y)
{
return ((y-x) > EPSILON);
}
bool fh_greater(const float_type x, const float_type y)
{
return ((x-y) > EPSILON);
}
bool fh_greater_equal_to(const float_type x, const float_type y)
{
return (((x-y) > EPSILON) || (((x-y) < EPSILON) && ((x-y) > -EPSILON)));
}
bool fh_less_equal_to(const float_type x, const float_type y)
{
return (((y-x) > EPSILON) || (((x-y) < EPSILON) && ((x-y) > -EPSILON)));
}
char host_logical_and(char column1, char column2)
{
//cout << "AND " << column1 << " " << column2 << endl;
if (column1 == 'A' && column2 == 'A')
return 'A';
else
if (column1 == 'N' || column2 == 'N') {
return 'N';
}
else
return 'R';
}
char host_logical_or(char column1, char column2)
{
//cout << "OR " << column1 << " " << column2 << endl;
if (column1 == 'A' && column2 == 'A')
return 'A';
else
if (column1 == 'N' && column2 == 'N')
return 'N';
else
return 'R';
}
char host_compare(int_type s, int_type d, int_type op_type)
{
char res = 'N';
if (op_type == 2 && d>s ) // >
res = 'A';
else
if (op_type == 1 && d<s) // <
res = 'A';
else
if (op_type == 6 && d>=s) // >=
res = 'A';
else
if (op_type == 5 && d<=s) // <=
res = 'A';
else
if (op_type == 4 && d==s)// =
res = 'A';
else // !=
if(d!=s)
res = 'A';
return res;
}
char host_compare(float_type s, float_type d, int_type op_type)
{
char res = 'N';
if (op_type == 2 && (d-s) > EPSILON) // >
res = 'A';
else
if (op_type == 1 && (s-d) > EPSILON) // <
res = 'A';
else
if (op_type == 6 && ((d-s) > EPSILON) || (((d-s) < EPSILON) && ((d-s) > -EPSILON))) // >=
res = 'A';
else
if (op_type == 5 && ((s-d) > EPSILON) || (((d-s) < EPSILON) && ((d-s) > -EPSILON))) // <=
res = 'A';
else
if (op_type == 4 && ((d-s) < EPSILON) && ((d-s) > -EPSILON))// =
res = 'A';
else // !=
if (!(((d-s) < EPSILON) && ((d-s) > -EPSILON)))
res = 'A';
return res;
}
char host_compare(int_type* column1, int_type d, int_type op_type)
{
char res = 'R';
//cout << "CMP " << column1[0] << " " << column1[1] << " " << d << " " << op_type << endl;
if (op_type == 2) { // >
if (column1[1] <= d)
res = 'N';
else
if (column1[0] > d)
res = 'A';
}
else
if (op_type == 1) { // <
if (column1[0] >= d)
res = 'N';
else
if (column1[1] < d)
res = 'A';
}
else
if (op_type == 6) { // >=
if (column1[1] < d)
res = 'N';
else
if (column1[0] >= d)
res = 'A';
}
else
if (op_type == 5) { // <=
if (column1[0] > d)
res = 'N';
else
if (column1[1] <= d)
res = 'A';
}
else
if (op_type == 4 && column1[0] == d && column1[1] == d) { // =
res = 'A';
};
//cout << "res " << res << endl;
return res;
}
char host_compare(float_type* column1, float_type d, int_type op_type)
{
char res = 'R';
//cout << "CMP " << column1[0] << " " << column1[1] << " with " << d << endl;
if (op_type == 2) { // >
if(fh_less_equal_to(column1[1],d)) {
res = 'N';
}
else
if(fh_greater(column1[0],d)) {
res = 'A';
};
}
else
if (op_type == 1) { // <
if(fh_less(column1[1],d)) {
res = 'A';
}
else
if(fh_greater_equal_to(column1[0],d)) {
res = 'N';
};
}
else
if (op_type == 6) { // >=
if(fh_greater_equal_to(column1[0],d)) {
res = 'A';
}
else
if(fh_less(column1[1],d)) {
res = 'N';
};
}
else
if (op_type == 5) { // <=
if(fh_less_equal_to(column1[1],d)) {
res = 'A';
}
else
if(fh_greater(column1[0],d)) {
res = 'N';
};
}
else
if (op_type == 4 && fh_equal_to(column1[0],d) && fh_equal_to(column1[1],d)) // =
res = 'A';
//cout << "res " << res << endl;
return res;
}
char host_compare(int_type* column1, int_type* column2, int_type op_type)
{
char res = 'R';
if (op_type == 2) { // >
if(column1[0] > column2[1])
res = 'A';
else
if(column1[1] <= column2[0])
res = 'N';
}
else
if (op_type == 1) { // <
if(column1[1] < column2[0])
res = 'A';
else
if(column1[0] >= column2[1])
res = 'N';
}
else
if (op_type == 6) { // >=
if(column1[0] >= column2[1])
res = 'A';
else
if(column1[1] < column2[0])
res = 'N';
}
else
if (op_type == 5) { // <=
if(column1[1] <= column2[0])
res = 'A';
else
if(column1[0] > column2[1])
res = 'N';
}
else
if (op_type == 4 && column1[0] == column2[1] && column1[1] == column2[0]) // =
res = 'A';
return res;
}
char host_compare(float_type* column1, float_type* column2, int_type op_type)
{
char res = 'R';
if (op_type == 2) { // >
if(fh_greater(column1[0],column2[1]))
res = 'A';
else
if(fh_less_equal_to(column1[1],column2[0]))
res = 'N';
}
else
if (op_type == 1) { // <
if(fh_less(column1[1],column2[0]))
res = 'A';
else
if(fh_greater_equal_to(column1[0],column2[1]))
res = 'N';
}
else
if (op_type == 6) { // >=
if(fh_greater_equal_to(column1[1],column2[0]))
res = 'A';
else
if(fh_less(column1[1],column2[0]))
res = 'N';
}
else
if (op_type == 5) { // <=
if(fh_less_equal_to(column1[1],column2[0]))
res = 'A';
else
if(fh_greater(column1[0],column2[1]))
res = 'N';
}
else
if (op_type == 4 && fh_equal_to(column1[0], column2[1]) && fh_equal_to(column1[1],column2[0])) // =
res = 'A';
return res;
}
char host_compare(float_type* column1, int_type* column2, int_type op_type)
{
char res = 'R';
if (op_type == 2) { // >
if(fh_greater(column1[0],(float_type)column2[1]))
res = 'A';
else
if(fh_less_equal_to(column1[1],(float_type)column2[0]))
res = 'N';
}
else
if (op_type == 1) { // <
if(fh_less(column1[1],(float_type)column2[0]))
res = 'A';
else
if(fh_greater_equal_to(column1[0],(float_type)column2[1]))
res = 'N';
}
else
if (op_type == 6) { // >=
if(fh_greater_equal_to(column1[1],(float_type)column2[0]))
res = 'A';
else
if(fh_less(column1[1],(float_type)column2[0]))
res = 'N';
}
else
if (op_type == 5) { // <=
if(fh_less_equal_to(column1[1],(float_type)column2[0]))
res = 'A';
else
if(fh_greater(column1[0],(float_type)column2[1]))
res = 'N';
}
else
if (op_type == 4 && fh_equal_to(column1[0],(float_type) column2[1]) && fh_equal_to(column1[1],(float_type)column2[0])) // =
res = 'A';
return res;
}
float_type* host_op(int_type* column1, float_type* column2, string op_type, int reverse)
{
float_type* temp = (float_type*)malloc(2*float_size);
temp[0] = (float_type)column1[0];
temp[1] = (float_type)column1[1];
if(reverse == 0) {
if (op_type.compare("MUL") == 0) {
temp[0] = temp[0] * column2[0];
temp[1] = temp[1] * column2[1];
}
else
if (op_type.compare("ADD") == 0) {
temp[0] = temp[0] + column2[0];
temp[1] = temp[1] + column2[1];
}
else
if (op_type.compare("MINUS") == 0) {
temp[0] = column2[0] - temp[0];
temp[1] = column2[1] - temp[1];
}
else {
temp[0] = column2[0] / temp[0];
temp[1] = column2[1] / temp[1];
}
}
else {
if (op_type.compare("MUL") == 0) {
temp[0] = temp[0] * column2[0];
temp[1] = temp[1] * column2[1];
}
else
if (op_type.compare("ADD") == 0) {
temp[0] = temp[0] + column2[0];
temp[1] = temp[1] + column2[1];
}
else
if (op_type.compare("MINUS") == 0) {
temp[0] = temp[0] - column2[0];
temp[1] = temp[1] - column2[1];
}
else {
temp[0] = temp[0] / column2[0];
temp[1] = temp[1] / column2[1];
}
};
return temp;
}
int_type* host_op(int_type* column1, int_type* column2, string op_type, int reverse)
{
int_type* temp = (int_type*)malloc(2*int_size);
if(reverse == 0) {
if (op_type.compare("MUL") == 0) {
temp[0] = column1[0] * column2[0];
temp[1] = column1[1] * column2[1];
}
else
if (op_type.compare("ADD") == 0) {
temp[0] = column1[0] + column2[0];
temp[1] = column1[1] + column2[1];
}
else
if (op_type.compare("MINUS") == 0) {
temp[0] = column1[0] - column2[0];
temp[1] = column1[1] - column2[1];
}
else {
temp[0] = column1[0] / column2[0];
temp[1] = column1[1] / column2[1];
}
}
else {
if (op_type.compare("MUL") == 0) {
temp[0] = column1[0] * column2[0];
temp[1] = column1[1] * column2[1];
}
else
if (op_type.compare("ADD") == 0) {
temp[0] = column1[0] + column2[0];
temp[1] = column1[1] + column2[1];
}
else
if (op_type.compare("MINUS") == 0) {
temp[0] = column2[0] - column1[0];
temp[1] = column2[1] - column1[1];
}
else {
temp[0] = column2[0] / column1[0];
temp[1] = column2[1] / column1[1];
}
}
return temp;
}
float_type* host_op(float_type* column1, float_type* column2, string op_type, int reverse)
{
float_type* temp = (float_type*)malloc(2*float_size);
if(reverse == 0) {
if (op_type.compare("MUL") == 0) {
temp[0] = column1[0] * column2[0];
temp[1] = column1[1] * column2[1];
}
else
if (op_type.compare("ADD") == 0) {
temp[0] = column1[0] + column2[0];
temp[1] = column1[1] + column2[1];
}
else
if (op_type.compare("MINUS") == 0) {
temp[0] = column1[0] - column2[0];
temp[1] = column1[1] - column2[1];
}
else {
temp[0] = column1[0] / column2[0];
temp[1] = column1[1] / column2[1];
}
}
else {
if (op_type.compare("MUL") == 0) {
temp[0] = column1[0] * column2[0];
temp[1] = column1[1] * column2[1];
}
else
if (op_type.compare("ADD") == 0) {
temp[0] = column1[0] + column2[0];
temp[1] = column1[1] + column2[1];
}
else
if (op_type.compare("MINUS") == 0) {
temp[0] = column2[0] - column1[0];
temp[1] = column2[1] - column1[1];
}
else {
temp[0] = column2[0] / column1[0];
temp[1] = column2[1] / column1[1];
}
}
return temp;
}
int_type* host_op(int_type* column1, int_type d, string op_type, int reverse)
{
int_type* temp = (int_type*)malloc(2*int_size);
if(reverse == 0) {
if (op_type.compare("MUL") == 0) {
temp[0] = column1[0] * d;
temp[1] = column1[1] * d;
}
else
if (op_type.compare("ADD") == 0) {
temp[0] = column1[0] + d;
temp[1] = column1[1] + d;
}
else
if (op_type.compare("MINUS") == 0) {
temp[0] = column1[0] - d;
temp[1] = column1[1] - d;
}
else {
temp[0] = column1[0] / d;
temp[1] = column1[1] / d;
}
}
else {
if (op_type.compare("MUL") == 0) {
temp[0] = column1[0] * d;
temp[1] = column1[1] * d;
}
else
if (op_type.compare("ADD") == 0) {
temp[0] = column1[0] + d;
temp[1] = column1[1] + d;
}
else
if (op_type.compare("MINUS") == 0) {
temp[0] = d - column1[0];
temp[1] = d - column1[1];
}
else {
temp[0] = d / column1[0];
temp[1] = d / column1[1];
}
};
return temp;
}
float_type* host_op(int_type* column1, float_type d, string op_type, int reverse)
{
float_type* temp = (float_type*)malloc(2*float_size);
temp[0] = (float_type)column1[0];
temp[1] = (float_type)column1[1];
float_type* temp1 = (float_type*)malloc(2*float_size);
if(reverse == 0) {
if (op_type.compare("MUL") == 0) {
temp1[0] = temp[0] * d;
temp1[1] = temp[1] * d;
}
else
if (op_type.compare("ADD") == 0) {
temp1[0] = temp[0] + d;
temp1[1] = temp[1] + d;
}
else
if (op_type.compare("MINUS") == 0) {
temp1[0] = temp[0] - d;
temp1[1] = temp[1] - d;
}
else {
temp1[0] = temp[0] / d;
temp1[1] = temp[1] / d;
}
}
else {
if (op_type.compare("MUL") == 0) {
temp1[0] = temp[0] * d;
temp1[1] = temp[1] * d;
}
else
if (op_type.compare("ADD") == 0) {
temp1[0] = temp[0] + d;
temp1[1] = temp[1] + d;
}
else
if (op_type.compare("MINUS") == 0) {
temp1[0] = d - temp[0];
temp1[1] = d - temp[1];
}
else {
temp1[0] = d / temp[0];
temp1[1] = d / temp[1];
}
};
free(temp);
return temp1;
}
float_type* host_op(float_type* column1, float_type d, string op_type,int reverse)
{
float_type* temp = (float_type*)malloc(2*float_size);
if(reverse == 0) {
if (op_type.compare("MUL") == 0) {
temp[0] = column1[0] * d;
temp[1] = column1[1] * d;
}
else
if (op_type.compare("ADD") == 0) {
temp[0] = column1[0] + d;
temp[1] = column1[1] + d;
}
else
if (op_type.compare("MINUS") == 0) {
temp[0] = column1[0] - d;
temp[1] = column1[1] - d;
}
else {
temp[0] = column1[0] / d;
temp[1] = column1[1] / d;
}
}
else {
if (op_type.compare("MUL") == 0) {
temp[0] = column1[0] * d;
temp[1] = column1[1] * d;
}
else
if (op_type.compare("ADD") == 0) {
temp[0] = column1[0] + d;
temp[1] = column1[1] + d;
}
else
if (op_type.compare("MINUS") == 0) {
temp[0] = d - column1[0];
temp[1] = d - column1[1];
}
else {
temp[0] = d / column1[0];
temp[1] = d / column1[1];
}
};
return temp;
}
unsigned int precision_func(unsigned int& p1, unsigned int& p2, string op) {
if (op.compare("DIV") != 0 ) {
unsigned int res;
if (op.compare("MUL") != 0 ) {
if(p1 > p2) {
res = p1;
p2 = p1-p2;
p1 = 0;
}
else {
res = p1;
p1 = p2-p1;
p2 = 0;
};
return res;
}
else {
//std::swap(p1,p2);
res = p1+p2;
p1 = 0;
p2 = 0;
return res;
};
}
else {
if(p1 == p2) {
p1 = p1+4;
p2 = 0;
return p1;
}
else {
if(p1 > p2) {
p1 = p1 + (p1-p2) + 4;
p2 = 0;
return p1;
}
else {
p2 = p2 + (p2-p1) + 4;
p1 = 0;
return p2;
}
}
};
}
//CudaSet a contains two records - with all minimum and maximum values of the segment
//We need to determine if this segment needs to be processed
//The check takes place in host's memory
char zone_map_check(queue<string> op_type, queue<string> op_value, queue<int_type> op_nums,queue<float_type> op_nums_f, queue<unsigned int> op_nums_precision, CudaSet* a, unsigned int segment)
{
stack<string> exe_type;
stack<string> exe_value;
stack<int_type*> exe_vectors;
stack<float_type*> exe_vectors_f;
stack<int_type> exe_nums;
stack<char> bool_vectors;
stack<unsigned int> exe_precision;
string s1, s2, s1_val, s2_val;
int_type n1, n2, res;
if(a->not_compressed)
return 'R';
//first we need to set all host arrays [0] and [1] of t to min and max values of appropriate files
set<string> uniques;
queue<string> fields(op_value);
CudaSet *t;
FILE* f;
unsigned int cnt;
string f1;
while(!fields.empty()) {
if (uniques.count(fields.front()) == 0 && var_exists(a, fields.front())) {
if(a->filtered)
t = varNames[a->source_name];
else
t = a;
// copy t min and max values to a only if int, decimal or float
if(t->type[fields.front()] <= 1) {
f1 = t->load_file_name + "." + fields.front() + "." + to_string(segment);
f = fopen (f1.c_str() , "rb" );
if(!f) {
cout << "Error opening " << f1 << " file " << endl;
exit(0);
};
fread((char *)&cnt, 4, 1, f);
if (t->type[fields.front()] == 0) {
a->h_columns_int[fields.front()].resize(2);
fread((char *)&a->h_columns_int[fields.front()][0], 8, 1, f);
fread((char *)&a->h_columns_int[fields.front()][1], 8, 1, f);
fseek(f, 8+cnt, SEEK_CUR);
fread((char *)&a->mRecCount, 4, 1, f);
//cout << endl << "ZONE " << a->mRecCount << endl;
fread((char *)&cnt, 4, 1, f);
//cout << "file " << f1 << " " << segment << " " << a->h_columns_int[fields.front()][0] << ":" << a->h_columns_int[fields.front()][1] << endl;
}
else {
long long int t;
a->h_columns_float[fields.front()].resize(2);
fread((char *)&t, 8, 1, f);
a->h_columns_float[fields.front()][0] = (float_type)t/100.0;
fread((char *)&t, 8, 1, f);
a->h_columns_float[fields.front()][1] = (float_type)t/100.0;
//cout << "file " << f1 << " " << segment << " " << a->h_columns_float[a->type_index[colIndex]][0] << ":" << a->h_columns_float[a->type_index[colIndex]][1] << endl;
};
fclose(f);
};
};
uniques.insert(fields.front());
fields.pop();
};
for(int i=0; !op_type.empty(); ++i, op_type.pop()) {
string ss = op_type.front();
//cout << ss << endl;
if (ss.compare("NAME") == 0 || ss.compare("NUMBER") == 0 || ss.compare("FLOAT") == 0
|| ss.compare("STRING") == 0) {
exe_type.push(ss);
if (ss.compare("NUMBER") == 0) {
exe_nums.push(op_nums.front());
op_nums.pop();
exe_precision.push(op_nums_precision.front());
op_nums_precision.pop();
}
else
if (ss.compare("NAME") == 0) {
if(var_exists(a, op_value.front())) {
exe_value.push(op_value.front());
op_value.pop();
}
else {
process_error(1, "Couldn't find column " + op_value.front());
//cout << "Couldn't find column " << op_value.front() << endl;
//exit(0);
};
}
else
if (ss.compare("STRING") == 0) {
exe_value.push(op_value.front());
op_value.pop();
}
}
else {
if (ss.compare("MUL") == 0 || ss.compare("ADD") == 0 || ss.compare("DIV") == 0 || ss.compare("MINUS") == 0) {
// get 2 values from the stack
s1 = exe_type.top();
exe_type.pop();
s2 = exe_type.top();
exe_type.pop();
if (s1.compare("NUMBER") == 0 && s2.compare("NUMBER") == 0) {
n1 = exe_nums.top();
exe_nums.pop();
n2 = exe_nums.top();
exe_nums.pop();
auto p1 = exe_precision.top();
exe_precision.pop();
auto p2 = exe_precision.top();
exe_precision.pop();
auto pres = precision_func(p1, p2, ss);
exe_precision.push(pres);
if(p1)
n1 = n1*(unsigned int)pow(10,p1);
if(p2)
n2 = n2*(unsigned int)pow(10,p2);
if (ss.compare("ADD") == 0 )
res = n1+n2;
else
if (ss.compare("MUL") == 0 )
res = n1*n2;
else
if (ss.compare("DIV") == 0 )
res = n1/n2;
else
res = n1-n2;
exe_type.push("NUMBER");
exe_nums.push(res);
}
else
if (s1.compare("NAME") == 0 && s2.compare("STRING") == 0) {
s1_val = exe_value.top();
exe_value.pop();
s2_val = exe_value.top();
exe_value.pop();
int_type val;
int_type* t = get_host_vec(a, s1_val, exe_vectors);
exe_type.push("NAME");
exe_value.push("");
exe_precision.push(0);
}
else
if (s2.compare("NAME") == 0 && s1.compare("STRING") == 0) {
s1_val = exe_value.top();
exe_value.pop();
s2_val = exe_value.top();
exe_value.pop();
int_type val;
int_type* t = get_host_vec(a, s2_val, exe_vectors);
//cout << "name " << s2_val << endl;
exe_type.push("NAME");
exe_value.push("");
exe_precision.push(0);
}
else
if (s1.compare("NAME") == 0 && s2.compare("NUMBER") == 0) {
s1_val = exe_value.top();
exe_value.pop();
n1 = exe_nums.top();
exe_nums.pop();
auto p2 = exe_precision.top();
exe_precision.pop();
auto p1 = get_decimals(a, s1_val, exe_precision);
int_type* t = get_host_vec(a, s1_val, exe_vectors);
auto pres = precision_func(p1, p2, ss);
exe_precision.push(pres);
if(p1) {
t[0] = t[0]*(unsigned int)pow(10,p1);
t[1] = t[1]*(unsigned int)pow(10,p1);
};
if(p2) {
n1 = n1*(unsigned int)pow(10,p2);
};
exe_type.push("NAME");
exe_value.push("");
exe_vectors.push(host_op(t,n1,ss,1));
}
else
if (s1.compare("NUMBER") == 0 && s2.compare("NAME") == 0) {
n1 = exe_nums.top();
exe_nums.pop();
s2_val = exe_value.top();
exe_value.pop();
auto p2 = exe_precision.top();
exe_precision.pop();
auto p1 = get_decimals(a, s2_val, exe_precision);
int_type* t = get_host_vec(a, s2_val, exe_vectors);
auto pres = precision_func(p1, p2, ss);
exe_precision.push(pres);
if(p1) {
t[0] = t[0]*(unsigned int)pow(10,p1);
t[1] = t[1]*(unsigned int)pow(10,p1);
};
if(p2) {
n1 = n1*(unsigned int)pow(10,p2);
};
exe_type.push("NAME");
exe_value.push("");
exe_vectors.push(host_op(t,n1,ss,0));
}
else
if (s1.compare("NAME") == 0 && s2.compare("NAME") == 0) {
s1_val = exe_value.top();
exe_value.pop();
s2_val = exe_value.top();
exe_value.pop();
auto p1 = get_decimals(a, s1_val, exe_precision);
auto p2 = get_decimals(a, s2_val, exe_precision);
int_type* t = get_host_vec(a, s1_val, exe_vectors);
int_type* s3 = get_host_vec(a, s2_val, exe_vectors);;
exe_type.push("NAME");
exe_value.push("");
auto pres = precision_func(p1, p2, ss);
exe_precision.push(pres);
if(p1) {
t[0] = t[0]*(unsigned int)pow(10,p1);
t[1] = t[1]*(unsigned int)pow(10,p1);
};
if(p2) {
s3[0] = s3[0]*(unsigned int)pow(10,p2);
s3[1] = s3[1]*(unsigned int)pow(10,p2);
};
exe_vectors.push(host_op(t,s3,ss,1));
if(std::find(a->columnNames.begin(), a->columnNames.end(), s1_val) == a->columnNames.end())
delete [] t;
if(std::find(a->columnNames.begin(), a->columnNames.end(), s2_val) == a->columnNames.end())
delete [] s3;
}
}
else
if (ss.compare("CMP") == 0) {
int_type cmp_type = op_nums.front();
op_nums.pop();
s1 = exe_type.top();
exe_type.pop();
s2 = exe_type.top();
exe_type.pop();
if (s1.compare("NUMBER") == 0 && s2.compare("NUMBER") == 0) {
n1 = exe_nums.top();
exe_nums.pop();
n2 = exe_nums.top();
exe_nums.pop();