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// Copyright (c) 2008 Roberto Raggi <roberto.raggi@gmail.com>

//

// Permission is hereby granted, free of charge, to any person obtaining a copy

// of this software and associated documentation files (the "Software"), to deal

// in the Software without restriction, including without limitation the rights

// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

// copies of the Software, and to permit persons to whom the Software is

// furnished to do so, subject to the following conditions:

//

// The above copyright notice and this permission notice shall be included in

// all copies or substantial portions of the Software.

//

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

// THE SOFTWARE.

#include "Literals.h"

#include <cstring>

#include <algorithm>

#include <iostream>

using namespace CPlusPlus;

////////////////////////////////////////////////////////////////////////////////

Literal::Literal(const char *chars, unsigned size)

    : _index(0), _next(0)

{

    _chars = new char[size + 1];

    std::strncpy(_chars, chars, size);

    _chars[size] = '\0';

    _size = size;

    _hashCode = hashCode(_chars, _size);

}

Literal::~Literal()

{ delete[] _chars; }

bool Literal::isEqualTo(const Literal *other) const

{

    if (! other)

        return false;

    else if (this == other)

        return true;

    else if (hashCode() != other->hashCode())

        return false;

    else if (size() != other->size())

        return false;

    return ! std::strcmp(chars(), other->chars());

}

Literal::iterator Literal::begin() const

{ return _chars; }

Literal::iterator Literal::end() const

{ return _chars + _size; }

const char *Literal::chars() const

{ return _chars; }

char Literal::at(unsigned index) const

{ return _chars[index]; }

unsigned Literal::size() const

{ return _size; }

unsigned Literal::hashCode() const

{ return _hashCode; }

unsigned Literal::hashCode(const char *chars, unsigned size)

{

    unsigned h = 0;

    for (unsigned i = 0; i < size; ++i)

        h = (h >> 5) - h + chars[i];

    return h;

}

////////////////////////////////////////////////////////////////////////////////

StringLiteral::StringLiteral(const char *chars, unsigned size)

    : Literal(chars, size)

{ }

StringLiteral::~StringLiteral()

{ }

////////////////////////////////////////////////////////////////////////////////

enum {

    NumericLiteralIsChar,

    NumericLiteralIsWideChar,

    NumericLiteralIsInt,

    NumericLiteralIsFloat,

    NumericLiteralIsDouble,

    NumericLiteralIsLongDouble,

    NumericLiteralIsLong,

    NumericLiteralIsLongLong

};

NumericLiteral::NumericLiteral(const char *chars, unsigned size)

    : Literal(chars, size), _flags(0)

{

    f._type = NumericLiteralIsInt;

    if (chars[0] == '\'') {

        f._type = NumericLiteralIsChar;

    } else if (size > 1 && chars[0] == 'L' && chars[1] == '\'') {

        f._type = NumericLiteralIsWideChar;

    } else if (size > 1 && chars[0] == '0' && (chars[1] == 'x' || chars[1] == 'X')) {

        f._isHex = true;

    } else {

        const char *begin = chars;

        const char *end = begin + size;

        bool done = false;

        const char *it = end - 1;

        for (; it != begin - 1 && ! done; --it) {

            switch (*it) {

            case 'l': case 'L': // long suffix

            case 'u': case 'U': // unsigned suffix

            case 'f': case 'F': // floating suffix

                break;

            default:

                done = true;

                break;

            } // switch

        }

        for (const char *dot = it; it != begin - 1; --it) {

            if (*dot == '.')

                f._type = NumericLiteralIsDouble;

        }

        for (++it; it != end; ++it) {

            if (*it == 'l' || *it == 'L') {

                if (f._type == NumericLiteralIsDouble) {

                    f._type = NumericLiteralIsLongDouble;

                } else if (it + 1 != end && (it[1] == 'l' || it[1] == 'L')) {

                    ++it;

                    f._type = NumericLiteralIsLongLong;

                } else {

                    f._type = NumericLiteralIsLong;

                }

            } else if (*it == 'f' || *it == 'F') {

                f._type = NumericLiteralIsFloat;

            } else if (*it == 'u' || *it == 'U') {

                f._isUnsigned = true;

            }

        }

    }

}

NumericLiteral::~NumericLiteral()

{ }

bool NumericLiteral::isHex() const

{ return f._isHex; }

bool NumericLiteral::isUnsigned() const

{ return f._isUnsigned; }

bool NumericLiteral::isChar() const

{ return f._type == NumericLiteralIsChar; }

bool NumericLiteral::isWideChar() const

{ return f._type == NumericLiteralIsWideChar; }

bool NumericLiteral::isInt() const

{ return f._type == NumericLiteralIsInt; }

bool NumericLiteral::isFloat() const

{ return f._type == NumericLiteralIsFloat; }

bool NumericLiteral::isDouble() const

{ return f._type == NumericLiteralIsDouble; }

bool NumericLiteral::isLongDouble() const

{ return f._type == NumericLiteralIsLongDouble; }

bool NumericLiteral::isLong() const

{ return f._type == NumericLiteralIsLong; }

bool NumericLiteral::isLongLong() const

{ return f._type == NumericLiteralIsLongLong; }

////////////////////////////////////////////////////////////////////////////////

Identifier::Identifier(const char *chars, unsigned size)

    : Literal(chars, size)

{ }

Identifier::~Identifier()

{ }