condense/Utilities.java


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

package condense;

import java.util.*;

public class Utilities {


    public static int computeStackFrameSize(String declare) {
        MinimalLogger.info(String.format("Computing frame stack size for %s...",
                                         declare));
        declare = extractNumeric(declare);
        // assume that the LAST three digits are
        // in, out, local
        String[] sizes = declare.split(SPACE)[:-3];
        int ret = this.stackFrameFormula(Integer.parseInt(sizes[1]),
                                         Integer.parseInt(sizes[2]));
        MinimalLogger.info(String.format("Stack size is (%s + %s + 2) * 4 = %d",
                                         sizes[1],
                                         sizes[2],
                                         ret));
        return ret;
    }

    private static int stackFrameFormula(int out, int local) {
        return (out + local + 2) * 4;
    }

    private static int extractNumeric(String str) {
        str = str.replaceAll("[^\\d] & quot;, "
                             ");
        str = str.trim();
        str = str.replaceAll(" + ", "
                             ");
        if (str.equals(" "))
            return "
                -1 & quot;
        ;
        return str;
    }
}