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#include <qregexp.h>

#include <qstring.h>

#include "qxmlutils_p.h"

QT_BEGIN_NAMESPACE

/* TODO:

 * - isNameChar() doesn't have to be public, it's only needed in

 *   qdom.cpp -- refactor fixedXmlName() to use isNCName()

 * - A lot of functions can be inlined.

 */

class QXmlCharRange

{

public:

    ushort min;

    ushort max;

};

typedef const QXmlCharRange *RangeIter;

/*!

  Performs a binary search between \a begin and \a end inclusive, to check whether \a

  c is contained. Remember that the QXmlCharRange instances must be in numeric order.

 */

bool QXmlUtils::rangeContains(RangeIter begin, RangeIter end, const QChar c)

{

    const ushort cp(c.unicode());

    // check the first two ranges "manually" as characters in that

    // range are checked very often and we avoid the binary search below.

    if (cp <= begin->max)

        return cp >= begin->min;

    ++begin;

    if (begin == end)

        return false;

    if (cp <= begin->max)

        return cp >= begin->min;

    while (begin != end) {

        int delta = (end - begin) / 2;

        RangeIter mid = begin + delta;

        if (mid->min > cp)

            end = mid;

        else if (mid->max < cp)

            begin = mid;

        else

            return true;

        if (delta == 0)

            break;

    }

    return false;

}

// [85] BaseChar ::= ...

static const QXmlCharRange g_base_begin[] =

{

    {0x0041, 0x005A}, {0x0061, 0x007A}, {0x00C0, 0x00D6}, {0x00D8, 0x00F6}, {0x00F8, 0x00FF},

    {0x0100, 0x0131}, {0x0134, 0x013E}, {0x0141, 0x0148}, {0x014A, 0x017E}, {0x0180, 0x01C3},

    {0x01CD, 0x01F0}, {0x01F4, 0x01F5}, {0x01FA, 0x0217}, {0x0250, 0x02A8}, {0x02BB, 0x02C1},

    {0x0386, 0x0386}, {0x0388, 0x038A}, {0x038C, 0x038C}, {0x038E, 0x03A1}, {0x03A3, 0x03CE},

    {0x03D0, 0x03D6}, {0x03DA, 0x03DA}, {0x03DC, 0x03DC}, {0x03DE, 0x03DE}, {0x03E0, 0x03E0},

    {0x03E2, 0x03F3}, {0x0401, 0x040C}, {0x040E, 0x044F}, {0x0451, 0x045C}, {0x045E, 0x0481},

    {0x0490, 0x04C4}, {0x04C7, 0x04C8}, {0x04CB, 0x04CC}, {0x04D0, 0x04EB}, {0x04EE, 0x04F5},

    {0x04F8, 0x04F9}, {0x0531, 0x0556}, {0x0559, 0x0559}, {0x0561, 0x0586}, {0x05D0, 0x05EA},

    {0x05F0, 0x05F2}, {0x0621, 0x063A}, {0x0641, 0x064A}, {0x0671, 0x06B7}, {0x06BA, 0x06BE},

    {0x06C0, 0x06CE}, {0x06D0, 0x06D3}, {0x06D5, 0x06D5}, {0x06E5, 0x06E6}, {0x0905, 0x0939},

    {0x093D, 0x093D}, {0x0958, 0x0961}, {0x0985, 0x098C}, {0x098F, 0x0990}, {0x0993, 0x09A8},

    {0x09AA, 0x09B0}, {0x09B2, 0x09B2}, {0x09B6, 0x09B9}, {0x09DC, 0x09DD}, {0x09DF, 0x09E1},

    {0x09F0, 0x09F1}, {0x0A05, 0x0A0A}, {0x0A0F, 0x0A10}, {0x0A13, 0x0A28}, {0x0A2A, 0x0A30},

    {0x0A32, 0x0A33}, {0x0A35, 0x0A36}, {0x0A38, 0x0A39}, {0x0A59, 0x0A5C}, {0x0A5E, 0x0A5E},

    {0x0A72, 0x0A74}, {0x0A85, 0x0A8B}, {0x0A8D, 0x0A8D}, {0x0A8F, 0x0A91}, {0x0A93, 0x0AA8},

    {0x0AAA, 0x0AB0}, {0x0AB2, 0x0AB3}, {0x0AB5, 0x0AB9}, {0x0ABD, 0x0ABD}, {0x0AE0, 0x0AE0},

    {0x0B05, 0x0B0C}, {0x0B0F, 0x0B10}, {0x0B13, 0x0B28}, {0x0B2A, 0x0B30}, {0x0B32, 0x0B33},

    {0x0B36, 0x0B39}, {0x0B3D, 0x0B3D}, {0x0B5C, 0x0B5D}, {0x0B5F, 0x0B61}, {0x0B85, 0x0B8A},

    {0x0B8E, 0x0B90}, {0x0B92, 0x0B95}, {0x0B99, 0x0B9A}, {0x0B9C, 0x0B9C}, {0x0B9E, 0x0B9F},

    {0x0BA3, 0x0BA4}, {0x0BA8, 0x0BAA}, {0x0BAE, 0x0BB5}, {0x0BB7, 0x0BB9}, {0x0C05, 0x0C0C},

    {0x0C0E, 0x0C10}, {0x0C12, 0x0C28}, {0x0C2A, 0x0C33}, {0x0C35, 0x0C39}, {0x0C60, 0x0C61},

    {0x0C85, 0x0C8C}, {0x0C8E, 0x0C90}, {0x0C92, 0x0CA8}, {0x0CAA, 0x0CB3}, {0x0CB5, 0x0CB9},

    {0x0CDE, 0x0CDE}, {0x0CE0, 0x0CE1}, {0x0D05, 0x0D0C}, {0x0D0E, 0x0D10}, {0x0D12, 0x0D28},

    {0x0D2A, 0x0D39}, {0x0D60, 0x0D61}, {0x0E01, 0x0E2E}, {0x0E30, 0x0E30}, {0x0E32, 0x0E33},

    {0x0E40, 0x0E45}, {0x0E81, 0x0E82}, {0x0E84, 0x0E84}, {0x0E87, 0x0E88}, {0x0E8A, 0x0E8A},

    {0x0E8D, 0x0E8D}, {0x0E94, 0x0E97}, {0x0E99, 0x0E9F}, {0x0EA1, 0x0EA3}, {0x0EA5, 0x0EA5},

    {0x0EA7, 0x0EA7}, {0x0EAA, 0x0EAB}, {0x0EAD, 0x0EAE}, {0x0EB0, 0x0EB0}, {0x0EB2, 0x0EB3},

    {0x0EBD, 0x0EBD}, {0x0EC0, 0x0EC4}, {0x0F40, 0x0F47}, {0x0F49, 0x0F69}, {0x10A0, 0x10C5},

    {0x10D0, 0x10F6}, {0x1100, 0x1100}, {0x1102, 0x1103}, {0x1105, 0x1107}, {0x1109, 0x1109},

    {0x110B, 0x110C}, {0x110E, 0x1112}, {0x113C, 0x113C}, {0x113E, 0x113E}, {0x1140, 0x1140},

    {0x114C, 0x114C}, {0x114E, 0x114E}, {0x1150, 0x1150}, {0x1154, 0x1155}, {0x1159, 0x1159},

    {0x115F, 0x1161}, {0x1163, 0x1163}, {0x1165, 0x1165}, {0x1167, 0x1167}, {0x1169, 0x1169},

    {0x116D, 0x116E}, {0x1172, 0x1173}, {0x1175, 0x1175}, {0x119E, 0x119E}, {0x11A8, 0x11A8},

    {0x11AB, 0x11AB}, {0x11AE, 0x11AF}, {0x11B7, 0x11B8}, {0x11BA, 0x11BA}, {0x11BC, 0x11C2},

    {0x11EB, 0x11EB}, {0x11F0, 0x11F0}, {0x11F9, 0x11F9}, {0x1E00, 0x1E9B}, {0x1EA0, 0x1EF9},

    {0x1F00, 0x1F15}, {0x1F18, 0x1F1D}, {0x1F20, 0x1F45}, {0x1F48, 0x1F4D}, {0x1F50, 0x1F57},

    {0x1F59, 0x1F59}, {0x1F5B, 0x1F5B}, {0x1F5D, 0x1F5D}, {0x1F5F, 0x1F7D}, {0x1F80, 0x1FB4},

    {0x1FB6, 0x1FBC}, {0x1FBE, 0x1FBE}, {0x1FC2, 0x1FC4}, {0x1FC6, 0x1FCC}, {0x1FD0, 0x1FD3},

    {0x1FD6, 0x1FDB}, {0x1FE0, 0x1FEC}, {0x1FF2, 0x1FF4}, {0x1FF6, 0x1FFC}, {0x2126, 0x2126},

    {0x212A, 0x212B}, {0x212E, 0x212E}, {0x2180, 0x2182}, {0x3041, 0x3094}, {0x30A1, 0x30FA},

    {0x3105, 0x312C}, {0xAC00, 0xD7A3}

};

static const RangeIter g_base_end = g_base_begin + sizeof(g_base_begin) / sizeof(QXmlCharRange);

static const QXmlCharRange g_ideographic_begin[] =

{

    {0x3007, 0x3007}, {0x3021, 0x3029}, {0x4E00, 0x9FA5}

};

static const RangeIter g_ideographic_end = g_ideographic_begin + sizeof(g_ideographic_begin) / sizeof(QXmlCharRange);

bool QXmlUtils::isIdeographic(const QChar c)

{

    return rangeContains(g_ideographic_begin, g_ideographic_end, c);

}

static const QXmlCharRange g_combining_begin[] =

{

    {0x0300, 0x0345}, {0x0360, 0x0361}, {0x0483, 0x0486}, {0x0591, 0x05A1}, {0x05A3, 0x05B9},

    {0x05BB, 0x05BD}, {0x05BF, 0x05BF}, {0x05C1, 0x05C2}, {0x05C4, 0x05C4}, {0x064B, 0x0652},

    {0x0670, 0x0670}, {0x06D6, 0x06DC}, {0x06DD, 0x06DF}, {0x06E0, 0x06E4}, {0x06E7, 0x06E8},

    {0x06EA, 0x06ED}, {0x0901, 0x0903}, {0x093C, 0x093C}, {0x093E, 0x094C}, {0x094D, 0x094D},

    {0x0951, 0x0954}, {0x0962, 0x0963}, {0x0981, 0x0983}, {0x09BC, 0x09BC}, {0x09BE, 0x09BE},

    {0x09BF, 0x09BF}, {0x09C0, 0x09C4}, {0x09C7, 0x09C8}, {0x09CB, 0x09CD}, {0x09D7, 0x09D7},

    {0x09E2, 0x09E3}, {0x0A02, 0x0A02}, {0x0A3C, 0x0A3C}, {0x0A3E, 0x0A3E}, {0x0A3F, 0x0A3F},

    {0x0A40, 0x0A42}, {0x0A47, 0x0A48}, {0x0A4B, 0x0A4D}, {0x0A70, 0x0A71}, {0x0A81, 0x0A83},

    {0x0ABC, 0x0ABC}, {0x0ABE, 0x0AC5}, {0x0AC7, 0x0AC9}, {0x0ACB, 0x0ACD}, {0x0B01, 0x0B03},

    {0x0B3C, 0x0B3C}, {0x0B3E, 0x0B43}, {0x0B47, 0x0B48}, {0x0B4B, 0x0B4D}, {0x0B56, 0x0B57},

    {0x0B82, 0x0B83}, {0x0BBE, 0x0BC2}, {0x0BC6, 0x0BC8}, {0x0BCA, 0x0BCD}, {0x0BD7, 0x0BD7},

    {0x0C01, 0x0C03}, {0x0C3E, 0x0C44}, {0x0C46, 0x0C48}, {0x0C4A, 0x0C4D}, {0x0C55, 0x0C56},

    {0x0C82, 0x0C83}, {0x0CBE, 0x0CC4}, {0x0CC6, 0x0CC8}, {0x0CCA, 0x0CCD}, {0x0CD5, 0x0CD6},

    {0x0D02, 0x0D03}, {0x0D3E, 0x0D43}, {0x0D46, 0x0D48}, {0x0D4A, 0x0D4D}, {0x0D57, 0x0D57},

    {0x0E31, 0x0E31}, {0x0E34, 0x0E3A}, {0x0E47, 0x0E4E}, {0x0EB1, 0x0EB1}, {0x0EB4, 0x0EB9},

    {0x0EBB, 0x0EBC}, {0x0EC8, 0x0ECD}, {0x0F18, 0x0F19}, {0x0F35, 0x0F35}, {0x0F37, 0x0F37},

    {0x0F39, 0x0F39}, {0x0F3E, 0x0F3E}, {0x0F3F, 0x0F3F}, {0x0F71, 0x0F84}, {0x0F86, 0x0F8B},

    {0x0F90, 0x0F95}, {0x0F97, 0x0F97}, {0x0F99, 0x0FAD}, {0x0FB1, 0x0FB7}, {0x0FB9, 0x0FB9},

    {0x20D0, 0x20DC}, {0x20E1, 0x20E1}, {0x302A, 0x302F}, {0x3099, 0x3099}, {0x309A, 0x309A}

};

static const RangeIter g_combining_end = g_combining_begin + sizeof(g_combining_begin) / sizeof(QXmlCharRange);

bool QXmlUtils::isCombiningChar(const QChar c)

{

    return rangeContains(g_combining_begin, g_combining_end, c);

}

// [88] Digit ::= ...

static const QXmlCharRange g_digit_begin[] =

{

    {0x0030, 0x0039}, {0x0660, 0x0669}, {0x06F0, 0x06F9}, {0x0966, 0x096F}, {0x09E6, 0x09EF},

    {0x0A66, 0x0A6F}, {0x0AE6, 0x0AEF}, {0x0B66, 0x0B6F}, {0x0BE7, 0x0BEF}, {0x0C66, 0x0C6F},

    {0x0CE6, 0x0CEF}, {0x0D66, 0x0D6F}, {0x0E50, 0x0E59}, {0x0ED0, 0x0ED9}, {0x0F20, 0x0F29}

};

static const RangeIter g_digit_end = g_digit_begin + sizeof(g_digit_begin) / sizeof(QXmlCharRange);

bool QXmlUtils::isDigit(const QChar c)

{

    return rangeContains(g_digit_begin, g_digit_end, c);

}

// [89] Extender ::= ...

static const QXmlCharRange g_extender_begin[] =

{

    {0x00B7, 0x00B7}, {0x02D0, 0x02D0}, {0x02D1, 0x02D1}, {0x0387, 0x0387}, {0x0640, 0x0640},

    {0x0E46, 0x0E46}, {0x0EC6, 0x0EC6}, {0x3005, 0x3005}, {0x3031, 0x3035}, {0x309D, 0x309E},

    {0x30FC, 0x30FE}

};

static const RangeIter g_extender_end = g_extender_begin + sizeof(g_extender_begin) / sizeof(QXmlCharRange);

bool QXmlUtils::isExtender(const QChar c)

{

    return rangeContains(g_extender_begin, g_extender_end, c);

}

bool QXmlUtils::isBaseChar(const QChar c)

{

    return rangeContains(g_base_begin, g_base_end, c);

}

/*!

   \internal

   Determines whether \a encName is a valid instance of production [81]EncName in the XML 1.0

   specification. If it is, true is returned, otherwise false.

    \sa \l {http://www.w3.org/TR/REC-xml/#NT-EncName}

           {Extensible Markup Language (XML) 1.0 (Fourth Edition), [81] EncName}

 */

bool QXmlUtils::isEncName(const QString &encName)

{

    /* Right, we here have a dependency on QRegExp. Writing a manual parser to

     * replace that regexp is probably a 70 lines so I prioritize this to when

     * the dependency is considered alarming, or when the rest of the bugs

     * are fixed. */

    const QRegExp encNameRegExp(QLatin1String("[A-Za-z][A-Za-z0-9._\\-]*"));

    Q_ASSERT(encNameRegExp.isValid());

    return encNameRegExp.exactMatch(encName);

}

/*!

 \internal

   Determines whether \a c is a valid instance of production [84]Letter in the XML 1.0

   specification. If it is, true is returned, otherwise false.

    \sa \l {http://www.w3.org/TR/REC-xml/#NT-Letter}

           {Extensible Markup Language (XML) 1.0 (Fourth Edition), [84] Letter}

 */

bool QXmlUtils::isLetter(const QChar c)

{

    return isBaseChar(c) || isIdeographic(c);

}

/*!

   \internal

   Determines whether \a c is a valid instance of production [2]Char in the XML 1.0

   specification. If it is, true is returned, otherwise false.

    \sa \l {http://www.w3.org/TR/REC-xml/#NT-Char}

           {Extensible Markup Language (XML) 1.0 (Fourth Edition), [2] Char}

 */

bool QXmlUtils::isChar(const QChar c)

{

    return (c.unicode() >= 0x0020 && c.unicode() <= 0xD7FF)

           || c.unicode() == 0x0009

           || c.unicode() == 0x000A

           || c.unicode() == 0x000D

           || (c.unicode() >= 0xE000 && c.unicode() <= 0xFFFD);

}

/*!

   \internal

   Determines whether \a c is a valid instance of

   production [4]NameChar in the XML 1.0 specification. If it

   is, true is returned, otherwise false.

    \sa \l {http://www.w3.org/TR/REC-xml/#NT-NameChar}

           {Extensible Markup Language (XML) 1.0 (Fourth Edition), [4] NameChar}

 */

bool QXmlUtils::isNameChar(const QChar c)

{

    return isBaseChar(c)

           || isDigit(c)

           || c.unicode() == '.'

           || c.unicode() == '-'

           || c.unicode() == '_'

           || c.unicode() == ':'

           || isCombiningChar(c)

           || isIdeographic(c)

           || isExtender(c);

}

/*!

   \internal

   Determines whether \a c is a valid instance of

   production [12] PubidLiteral in the XML 1.0 specification. If it

   is, true is returned, otherwise false.

    \sa \l {http://www.w3.org/TR/REC-xml/#NT-PubidLiteral}

           {Extensible Markup Language (XML) 1.0 (Fourth Edition), [12] PubidLiteral}

 */

bool QXmlUtils::isPublicID(const QString &candidate)

{

    const int len = candidate.length();

    for(int i = 0; i < len; ++i)

    {

        const ushort cp = candidate.at(i).unicode();

        if ((cp >= 'a' && cp <= 'z')

            || (cp >= 'A' && cp <= 'Z')

            || (cp >= '0' && cp <= '9'))

        {

            continue;

        }

        switch (cp)

        {

            /* Fallthrough all these. */

            case 0x20:

            case 0x0D:

            case 0x0A:

            case '-':

            case '\'':

            case '(':

            case ')':

            case '+':

            case ',':

            case '.':

            case '/':

            case ':':

            case '=':

            case '?':

            case ';':

            case '!':

            case '*':

            case '#':

            case '@':

            case '$':

            case '_':

            case '%':

                continue;

            default:

                return false;

        }

    }

    return true;

}

/*!

   \internal

   Determines whether \a c is a valid instance of

   production [4]NCName in the XML 1.0 Namespaces specification. If it

   is, true is returned, otherwise false.

    \sa \l {http://www.w3.org/TR/REC-xml-names/#NT-NCName}

           {W3CNamespaces in XML 1.0 (Second Edition), [4] NCName}

 */

bool QXmlUtils::isNCName(const QStringRef &ncName)

{

    if(ncName.isEmpty())

        return false;

    const QChar first(ncName.at(0));

    if(!QXmlUtils::isLetter(first) && first.unicode() != '_' && first.unicode() != ':')

        return false;

    const int len = ncName.size();

    for(int i = 0; i < len; ++i)

    {

        const QChar &at = ncName.at(i);

        if(!QXmlUtils::isNameChar(at) || at == QLatin1Char(':'))

            return false;

    }

    return true;

}

QT_END_NAMESPACE