Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.io.*;

public class Main {
    /**
     * The bit array representing the valid XML version characters.
     */
    public static final int[] VERSION_CHARACTER = { 0, 134176768, -2013265922, 134217726, };

    /**
     * Reads an XML declaration to get the encoding declaration value.
     * 
     * @param r
     *            a reader positioned at the start of an xml document
     * @param e
     *            the encoding to return by default or on error.
     */
    public static String getXMLDeclarationEncoding(Reader r, String e) throws IOException {
        int c;

        while (isXMLSpace((char) (c = r.read()))) {
            // skip space
        }

        if (c != '<') {
            return e;
        }
        if ((c = r.read()) != '?') {
            return e;
        }
        if ((c = r.read()) != 'x') {
            return e;
        }
        if ((c = r.read()) != 'm') {
            return e;
        }
        if ((c = r.read()) != 'l') {
            return e;
        }

        if (!isXMLSpace((char) (c = r.read()))) {
            return e;
        }

        while (isXMLSpace((char) (c = r.read()))) {
            // skip space
        }

        if (c != 'v') {
            return e;
        }
        if ((c = r.read()) != 'e') {
            return e;
        }
        if ((c = r.read()) != 'r') {
            return e;
        }
        if ((c = r.read()) != 's') {
            return e;
        }
        if ((c = r.read()) != 'i') {
            return e;
        }
        if ((c = r.read()) != 'o') {
            return e;
        }
        if ((c = r.read()) != 'n') {
            return e;
        }

        c = r.read();
        while (isXMLSpace((char) c)) {
            c = r.read();
        }

        if (c != '=') {
            return e;
        }

        while (isXMLSpace((char) (c = r.read()))) {
            // skip space
        }

        if (c != '"' && c != '\'') {
            return e;
        }
        char sc = (char) c;

        for (;;) {
            c = r.read();
            if (c == sc) {
                break;
            }
            if (!isXMLVersionCharacter((char) c)) {
                return e;
            }
        }

        if (!isXMLSpace((char) (c = r.read()))) {
            return e;
        }
        while (isXMLSpace((char) (c = r.read()))) {
            // skip space
        }

        if (c != 'e') {
            return e;
        }
        if ((c = r.read()) != 'n') {
            return e;
        }
        if ((c = r.read()) != 'c') {
            return e;
        }
        if ((c = r.read()) != 'o') {
            return e;
        }
        if ((c = r.read()) != 'd') {
            return e;
        }
        if ((c = r.read()) != 'i') {
            return e;
        }
        if ((c = r.read()) != 'n') {
            return e;
        }
        if ((c = r.read()) != 'g') {
            return e;
        }

        c = r.read();
        while (isXMLSpace((char) c)) {
            c = r.read();
        }

        if (c != '=') {
            return e;
        }

        while (isXMLSpace((char) (c = r.read()))) {
            // skip space
        }

        if (c != '"' && c != '\'') {
            return e;
        }
        sc = (char) c;

        StringBuffer enc = new StringBuffer();
        for (;;) {
            c = r.read();
            if (c == -1) {
                return e;
            }
            if (c == sc) {
                return enc.toString();
            }
            enc.append((char) c);
        }
    }

    /**
     * Tests whether the given character is a valid space.
     */
    public static boolean isXMLSpace(char c) {
        return (c <= 0x0020)
                && (((((1L << 0x0009) | (1L << 0x000A) | (1L << 0x000D) | (1L << 0x0020)) >> c) & 1L) != 0);
    }

    /**
     * Tests whether the given character is a valid XML version character.
     */
    public static boolean isXMLVersionCharacter(char c) {
        return (c < 128) && (VERSION_CHARACTER[c / 32] & (1 << (c % 32))) != 0;
    }
}