simplexml.cpp

著名的Parser库Spirit在VC6上的Port

//
// XML grammar implemented with Spirit (http://spirit.sourceforge.net/)
//
// Copyright (c) 2001, Daniel C. Nuffer, All rights reserved

#include <boost/spirit/spirit.hpp>
#include <iostream>

using namespace spirit;
using namespace std;

static void
Parse(rule<const char*> const& rule_, char const* expr)
{
    cout << "/////////////////////////////////////////////////////////\n\n";

    parse_info<char const*> result = parse(expr, rule_);

    if (result.full)
    {
        cout << "\t\t" << expr << " Parses OK\n\n\n";
    }
    else
    {
        cout << "\t\t" << expr << " Fails Parsing\n";
        cout << "\t\t";
        for (int i = 0; i < (result.stop - expr); i++)
            cout << " ";
        cout << "^--Here\n\n\n";
    }
}

typedef chset<unsigned char> chset_t;
typedef chlit<unsigned char> chlit_t;

int
main()
{

    // Start grammar definition
    rule<const char*>    prolog, element, Misc, Reference,
                CData, doctypedecl, XMLDecl, SDDecl, VersionInfo, EncodingDecl,
                VersionNum, Eq, EmptyElemTag, STag, content, ETag, Attribute,
                AttValue, CharData, Comment, CDSect,
                CharRef, EntityRef, EncName, document,
                Name, Comment1, S;

    // This is the start rule for XML
    document =         prolog >> element >> *Misc;
    chset_t Char("\x9\xA\xD\x20-\xFF");

    chset_t Sch("\x20\x9\xD\xA");
    S =                 +(Sch);
    chset_t Letter("\x41-\x5A\x61-\x7A\xC0-\xD6\xD8-\xF6\xF8-\xFF");

    chset_t Digit("0-9");
    chlit_t Extender('\xB7');


    chset_t NameChar = Letter | Digit | chset_t("._:-") | Extender;
    Name =             (Letter | '_' | ':') >> *(NameChar);

    AttValue =   '"' >> *((anychar - (chset_t('<') | '&' | '"')) | Reference)
                            >> '"'
              | '\'' >> *((anychar - (chset_t('<') | '&' | '\'')) | Reference)
                            >> '\'';

    chset_t CharDataChar (anychar - (chset_t('<') | chset_t('&')));
    CharData =        *(CharDataChar - str_p("]]>"));

    Comment1 = *((Char - ch_p('-')) | (ch_p('-') >> (Char - ch_p('-'))));
    Comment =        str_p("<!--") >> Comment1 >> str_p("-->");

    CDSect =            str_p("<![CDATA[") >> CData >> str_p("]]>");
    CData =            *(Char - str_p("]]>"));

    prolog =            !XMLDecl >> *Misc >> !(doctypedecl >> *Misc);
    XMLDecl =        str_p("<?xml") >> VersionInfo >> !EncodingDecl >> !SDDecl >> !S >> str_p("?>");
    VersionInfo =    S >> str_p("version") >> Eq >> (ch_p('\'') >> VersionNum >>'\''
                            | ch_p('"') >> VersionNum >> '"');
    Eq =                !S >> '=' >> !S;
    chset_t VersionNumCh("A-Za-z0-9_.:-");
    VersionNum =    +(VersionNumCh);
    Misc =            Comment | S;

    doctypedecl =    str_p("<!DOCTYPE") >> *(Char - (chset_t('[') | '>')) >> !('[' >> *(Char - ']') >> ']') >> '>';

    SDDecl =            S >> str_p("standalone") >> Eq >> ((ch_p('\'') >> (str_p("yes") | str_p("no")) >> '\'')
                            | (ch_p('"') >> (str_p("yes") | str_p("no")) >> '"'));

    element =        EmptyElemTag
                        | STag >> content >> ETag;

    STag =            '<' >> Name >> *(S >> Attribute) >> !S >> '>';
    Attribute =        Name >> Eq >> AttValue;
    ETag =            str_p("</") >> Name >> !S >> '>';
    content =        !CharData >> *((element | Reference | CDSect | Comment) >> !CharData);
    EmptyElemTag =    '<' >> Name >> *(S >> Attribute) >> !S >> str_p("/>");

    CharRef =        str_p("&#") >> +digit >> ';'
                        | str_p("&#x") >> +xdigit >> ';';

    Reference =        EntityRef | CharRef;
    EntityRef =        '&' >> Name >> ';';

    EncodingDecl =    S >> str_p("encoding") >> Eq >> (ch_p('"') >> EncName >> '"' |
                            ch_p('\'') >> EncName >> '\'');
    chset_t EncNameCh = VersionNumCh - chset_t(':');
    EncName =        alpha >> *(EncNameCh);





    cout << "The following should fail parsing:\n";

    Parse(document, "<!-- declarations for <head> & <body> -->");

    Parse(document,
            "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>"
            "<!DOCTYPE greeting ["
                "<!ELEMENT greeting (#PCDATA)>"
            "]>"
            "<greeting>Hello, world!</greeting>"
            "<!-- B+, B, or B--->");

    Parse(document,
            "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>"
            "<!DOCTYPE greeting [<!ELEMENT greeting (#PCDATA)>]>"
            "<greetingHello, world!</greeting>");

    Parse(document,
            "<?xml version=\"1.0\"? >"
            " <greeting>Hello, world!</greeting>");

    Parse(document,
            "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>"
            "<!DOCTYPE greeting [<!ELEMENT greeting (#PCDATA)>]>"
            "<![CDATA[<greeting>Hello, world!</greeting>]]>");

    cout << "The following should parse OK:\n";

    Parse(document,
            "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>"
            "<!DOCTYPE greeting [<!ELEMENT greeting (#PCDATA)>]>"
            "<greeting>Hello, world!</greeting>");

    Parse(document,
            "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>"
            "<!DOCTYPE greeting [<!ELEMENT greeting (#PCDATA)>]>"
            "<greeting>Hello, world!</greeting>"
            "<!-- declarations for <head> & <body> -->");

    Parse(CDSect,
            "<![CDATA[<greeting>Hello, world!</greeting>]]>");

    Parse(document,
            "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>"
            "<!DOCTYPE greeting ["
                "<!ELEMENT greeting (#PCDATA)>"
            "]>"
            "<greeting>Hello, world!"
                "<![CDATA[<greeting>Hello, world!</greeting>]]>"
            "</greeting>");

    Parse(document,
            "<?xml version=\"1.0\"?>"
            " <greeting>Hello, world!</greeting>");

    Parse(document, "<greeting>Hello, world!</greeting>");

    Parse(document,
            "<?xml version=\"1.0\"?> "
            "<!DOCTYPE greeting SYSTEM \"hello.dtd\"> "
            "<greeting>Hello, world!</greeting>");

    Parse(document,
            "<?xml version=\"1.0\" standalone='yes'?> "
            "<greeting>Hello, world!</greeting>");

    Parse(document,
            "<?xml version=\"1.0\" standalone='yes'?> "
            "<!DOCTYPE greeting SYSTEM \"hello.dtd\"> "
            "<greeting>Hello, world!</greeting>");

    Parse(document,
                        "<?xml version=\"1.0\" encoding=\"ISO8859-1\" ?>"
                            "<note>"
                                  "<to>Tove</to>"
                                "<from>Jani</from>"
                                "<heading>Reminder</heading>"
                                "<body>Don't forget me this weekend!</body>"
                            "</note>" );

    Parse(document,
                       "<?xml version=\"1.0\"?>"
                            "<!DOCTYPE note ["
                                "<!ELEMENT note    (to,from,heading,body)>"
                                "<!ELEMENT to      (#PCDATA)>"
                                "<!ELEMENT from    (#PCDATA)>"
                                "<!ELEMENT heading (#PCDATA)>"
                                "<!ELEMENT body    (#PCDATA)>"
                            "]>"
                            "<note>"
                                "<to>Tove</to>"
                                "<from>Jani</from>"
                                "<heading>Reminder</heading>"
                                 "<body>Don't forget me this weekend!</body>"
                             "</note>");

    return 0;
}