boolean processFile()

in HSQL/src/org/hsqldb1/util/CodeSwitcher.java [321:491]
125 lines of code
33 McCabe index (conditional complexity)

    boolean processFile(String name) {

        File    f         = new File(name);
        File    fnew      = new File(name + ".new");
        int     state     = 0;    // 0=normal 1=inside_if 2=inside_else
        boolean switchoff = false;
        boolean working   = false;

        try {
            Vector v  = getFileLines(f);
            Vector v1 = new Vector(v.size());

            for (int i = 0; i < v.size(); i++) {
                v1.addElement(v.elementAt(i));
            }

            for (int i = 0; i < v.size(); i++) {
                String line = (String) v.elementAt(i);

                if (line == null) {
                    break;
                }

                if (working) {
                    if (line.equals("/*") || line.equals("*/")) {
                        v.removeElementAt(i--);

                        continue;
                    }
                }

                if (line.startsWith("//#")) {
                    if (line.startsWith("//#ifdef ")) {
                        if (state != 0) {
                            printError("'#ifdef' not allowed inside '#ifdef'");

                            return false;
                        }

                        state = 1;

                        String s = line.substring(9);

                        if (vSwitchOn.indexOf(s) != -1) {
                            working   = true;
                            switchoff = false;
                        } else if (vSwitchOff.indexOf(s) != -1) {
                            working = true;

                            v.insertElementAt("/*", ++i);

                            switchoff = true;
                        }

                        if (vSwitches.indexOf(s) == -1) {
                            vSwitches.addElement(s);
                        }
                    } else if (line.startsWith("//#ifndef ")) {
                        if (state != 0) {
                            printError(
                                "'#ifndef' not allowed inside '#ifdef'");

                            return false;
                        }

                        state = 1;

                        String s = line.substring(10);

                        if (vSwitchOff.indexOf(s) != -1) {
                            working   = true;
                            switchoff = false;
                        } else if (vSwitchOn.indexOf(s) != -1) {
                            working = true;

                            v.insertElementAt("/*", ++i);

                            switchoff = true;
                        }

                        if (vSwitches.indexOf(s) == -1) {
                            vSwitches.addElement(s);
                        }
                    } else if (line.startsWith("//#else")) {
                        if (state != 1) {
                            printError("'#else' without '#ifdef'");

                            return false;
                        }

                        state = 2;

                        if (!working) {}
                        else if (switchoff) {
                            if (v.elementAt(i - 1).equals("")) {
                                v.insertElementAt("*/", i - 1);

                                i++;
                            } else {
                                v.insertElementAt("*/", i++);
                            }

                            switchoff = false;
                        } else {
                            v.insertElementAt("/*", ++i);

                            switchoff = true;
                        }
                    } else if (line.startsWith("//#endif")) {
                        if (state == 0) {
                            printError("'#endif' without '#ifdef'");

                            return false;
                        }

                        state = 0;

                        if (working && switchoff) {
                            if (v.elementAt(i - 1).equals("")) {
                                v.insertElementAt("*/", i - 1);

                                i++;
                            } else {
                                v.insertElementAt("*/", i++);
                            }
                        }

                        working = false;
                    } else {}
                }
            }

            if (state != 0) {
                printError("'#endif' missing");

                return false;
            }

            boolean filechanged = false;

            for (int i = 0; i < v.size(); i++) {
                if (!v1.elementAt(i).equals(v.elementAt(i))) {
                    filechanged = true;

                    break;
                }
            }

            if (!filechanged) {
                return true;
            }

            writeFileLines(v, fnew);

            File fbak = new File(name + ".bak");

            fbak.delete();
            f.renameTo(fbak);

            File fcopy = new File(name);

            fnew.renameTo(fcopy);
            fbak.delete();

            return true;
        } catch (Exception e) {
            printError(e.toString());

            return false;
        }
    }