/*-----------------------------------------------------------------------------------------------
The MIT License (MIT)

Copyright (c) 2014-2020 Kim Kulling

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.
-----------------------------------------------------------------------------------------------*/
#pragma once

#include <openddlparser/OpenDDLCommon.h>

BEGIN_ODDLPARSER_NS

template <class T>
inline bool isUpperCase(T in) {
    return (in >= 'A' && in <= 'Z');
}

template <class T>
inline bool isLowerCase(T in) {
    return (in >= 'a' && in <= 'z');
}

template <class T>
inline bool isSpace(const T in) {
    return (' ' == in || '\t' == in);
}

template <class T>
inline bool isNewLine(const T in) {
    return ('\n' == in || ('\r' == in));
}

template <class T>
inline bool isSeparator(T in) {
    if (isSpace(in) || ',' == in || '{' == in || '}' == in || '[' == in || '(' == in || ')' == in) {
        return true;
    }
    return false;
}

const size_t CharTableSize = 256;

static const unsigned char chartype_table[CharTableSize] = {
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0, // 0-15
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0, // 16-31
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0, // 32-47
    1,
    1,
    1,
    1,
    1,
    1,
    1,
    1,
    1,
    1,
    1,
    0,
    0,
    0,
    0,
    0, // 48-63

    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0, // 64-79
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0, // 80-95
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0, // 96-111
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0, // 112-127

    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0, // > 127
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,

    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
};

template <class T>
inline bool isNumeric(const T in) {
    if (static_cast<size_t>(in) >= CharTableSize) {
        return '\0';
    }

    size_t idx = static_cast<size_t>(in);
    return idx < sizeof(chartype_table) && (chartype_table[idx] == 1);
}

template <class T>
inline bool isNotEndOfToken(T *in, T *end) {
    return ('}' != *in && ',' != *in && !isSpace(*in) && ')' != *in && in != end);
}

template <class T>
inline bool isInteger(T *in, T *end) {
    if (in != end) {
        if (*in == '-') {
            ++in;
        }
    }

    bool result(false);
    while (isNotEndOfToken(in, end)) {
        result = isNumeric(*in);
        if (!result) {
            break;
        }
        ++in;
    }

    return result;
}

template <class T>
inline bool isFloat(T *in, T *end) {
    if (in != end) {
        if (*in == '-') {
            ++in;
        }
    }

    // check for <1>.0f
    bool result(false);
    while (isNotEndOfToken(in, end)) {
        if (*in == '.') {
            result = true;
            break;
        }
        result = isNumeric(*in);
        if (!result) {
            return false;
        }
        ++in;
    }

    // check for 1<.>0f
    if (*in == '.') {
        ++in;
    } else {
        return false;
    }

    // check for 1.<0>f
    while (isNotEndOfToken(in, end)) {
        result = isNumeric(*in);
        if (!result) {
            return false;
        }
        ++in;
    }

    return result;
}

template <class T>
inline bool isCharacter(const T in) {
    return ((in >= 'a' && in <= 'z') || (in >= 'A' && in <= 'Z'));
}

template <class T>
inline bool isStringLiteral(const T in) {
    return (in == '\"');
}

template <class T>
inline bool isHexLiteral(T *in, T *end) {
    if (*in == '0') {
        if (in + 1 != end) {
            if (*(in + 1) == 'x' || *(in + 1) == 'X') {
                return true;
            }
        }
    }

    return false;
}

template <class T>
inline bool isReference(T *in, T *end) {
    if (*in == 'r') {
        if (*(in + 1) == 'e') {
            if (*(in + 2) == 'f') {
                if ((in + 2) != end) {
                    return true;
                }
            }
        }
    }

    return false;
}

template <class T>
inline bool isEndofLine(const T in) {
    return ('\n' == in);
}

template <class T>
inline static T *getNextSeparator(T *in, T *end) {
    while (in != end && !isSeparator(*in)) {
        ++in;
    }
    return in;
}

static const int ErrorHex2Decimal = 9999999;

inline int hex2Decimal(char in) {
    if (isNumeric(in)) {
        return (in - 48);
    }

    char hexCodeLower('a'), hexCodeUpper('A');
    for (int i = 0; i < 16; i++) {
        if (in == hexCodeLower + i || in == hexCodeUpper + i) {
            return (i + 10);
        }
    }

    return ErrorHex2Decimal;
}

template <class T>
inline bool isComment(T *in, T *end) {
    if (*in == '/') {
        if (in + 1 != end) {
            if (*(in + 1) == '/') {
                char *drive((in + 2));
                if ((isUpperCase<T>(*drive) || isLowerCase<T>(*drive)) && *(drive + 1) == '/') {
                    return false;
                } else {
                    return true;
                }
            }
        }
    }

    return false;
}

template <class T>
inline bool isCommentOpenTag(T *in, T *end) {
    if (*in == '/') {
        if (in + 1 != end) {
            if (*(in + 1) == '*') {
                return true;
            }
        }
    }

    return false;
}

template <class T>
inline bool isCommentCloseTag(T *in, T *end) {
    if (*in == '*') {
        if (in + 1 != end) {
            if (*(in + 1) == '/') {
                return true;
            }
        }
    }

    return false;
}

END_ODDLPARSER_NS
