CWE-ou-minkata/Sources/Plasma/CoreLib/plString.h

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

Additional permissions under GNU GPL version 3 section 7

If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
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*==LICENSE==*/

#ifndef plString_Defined
#define plString_Defined

#include "HeadSpin.h"
#include <vector>

typedef unsigned int UniChar;

#define SSO_CHARS (16)
#define WHITESPACE_CHARS " \t\n\r"

template <typename _Ch>
class plStringBuffer
{
private:
    struct StringRef
    {
        unsigned int fRefs;
        const _Ch *fStringData;

        StringRef(const _Ch *data)
            : fRefs(1), fStringData(data) { }

        inline void AddRef() { ++fRefs; }
        inline void DecRef()
        {
            if (--fRefs == 0) {
                delete [] fStringData;
                delete this;
            }
        }
    };

    union {
        StringRef *fData;
        _Ch fShort[SSO_CHARS];
    };
    size_t fSize;

    bool IHaveACow() const { return fSize >= SSO_CHARS; }

public:
    plStringBuffer() : fSize(0) { memset(fShort, 0, sizeof(fShort)); }

    plStringBuffer(const plStringBuffer<_Ch> &copy) : fSize(copy.fSize)
    {
        memcpy(fShort, copy.fShort, sizeof(fShort));
        if (IHaveACow())
            fData->AddRef();
    }

    plStringBuffer(const _Ch *data, size_t size) : fSize(size)
    {
        memset(fShort, 0, sizeof(fShort));
        _Ch *copyData = IHaveACow() ? new _Ch[size + 1] : fShort;
        memcpy(copyData, data, size);
        copyData[size] = 0;

        if (IHaveACow())
            fData = new StringRef(copyData);
    }

    ~plStringBuffer<_Ch>()
    {
        if (IHaveACow())
            fData->DecRef();
    }

    plStringBuffer<_Ch> &operator=(const plStringBuffer<_Ch> &copy)
    {
        if (copy.IHaveACow())
            copy.fData->AddRef();
        if (IHaveACow())
            fData->DecRef();

        memcpy(fShort, copy.fShort, sizeof(fShort));
        fSize = copy.fSize;
        return *this;
    }

    const _Ch *GetData() const { return IHaveACow() ? fData->fStringData : fShort; }
    size_t GetSize() const { return fSize; }
    operator const _Ch *() const { return GetData(); }

    // From Haxxia with love
    // NOTE:  The client is expected to nul-terminate the returned buffer!
    _Ch *CreateWritableBuffer(size_t size)
    {
        if (IHaveACow())
            fData->DecRef();

        fSize = size;
        if (IHaveACow()) {
            _Ch *writable = new _Ch[fSize + 1];
            fData = new StringRef(writable);
            return writable;
        } else {
            return fShort;
        }
    }
};

typedef plStringBuffer<UniChar> plUnicodeBuffer;


class plString
{
public:
    enum {
        kSizeAuto = (size_t)(0x80000000)
    };
    static const plString Null;

private:
    plStringBuffer<char> fUtf8Buffer;

    void IConvertFromUtf8(const char *utf8, size_t size);
    void IConvertFromUtf16(const uint16_t *utf16, size_t size);
    void IConvertFromWchar(const wchar_t *wstr, size_t size);
    void IConvertFromUtf32(const UniChar *ustr, size_t size);
    void IConvertFromIso8859_1(const char *astr, size_t size);

public:
    plString() { }

    plString(const char *cstr) { IConvertFromUtf8(cstr, kSizeAuto); }
    plString(const plString &copy) : fUtf8Buffer(copy.fUtf8Buffer) { }
    plString(const plStringBuffer<char> &init) { operator=(init); }
    plString(const plUnicodeBuffer &init) { IConvertFromUtf32(init.GetData(), init.GetSize()); }

    plString &operator=(const char *cstr) { IConvertFromUtf8(cstr, kSizeAuto); return *this; }
    plString &operator=(const plString &copy) { fUtf8Buffer = copy.fUtf8Buffer; return *this; }
    plString &operator=(const plStringBuffer<char> &init);
    plString &operator=(const plUnicodeBuffer &init) { IConvertFromUtf32(init.GetData(), init.GetSize()); return *this; }

    plString &operator+=(const char *cstr) { return operator=(*this + cstr); }
    plString &operator+=(const plString &str) { return operator=(*this + str); }

    static inline plString FromUtf8(const char *utf8, size_t size = kSizeAuto)
    {
        plString str;
        str.IConvertFromUtf8(utf8, size);
        return str;
    }

    static inline plString FromUtf16(const uint16_t *utf16, size_t size = kSizeAuto)
    {
        plString str;
        str.IConvertFromUtf16(utf16, size);
        return str;
    }

    static inline plString FromWchar(const wchar_t *wstr, size_t size = kSizeAuto)
    {
        plString str;
        str.IConvertFromWchar(wstr, size);
        return str;
    }

    static inline plString FromIso8859_1(const char *astr, size_t size = kSizeAuto)
    {
        plString str;
        str.IConvertFromIso8859_1(astr, size);
        return str;
    }

    const char *c_str(const char *substitute = "") const
    { return IsEmpty() ? substitute : fUtf8Buffer.GetData(); }

    char CharAt(size_t position) const { return c_str()[position]; }

    plStringBuffer<char> ToUtf8() const { return fUtf8Buffer; }
    plStringBuffer<uint16_t> ToUtf16() const;
    plStringBuffer<wchar_t> ToWchar() const;
    plStringBuffer<char> ToIso8859_1() const;

    // For use in displaying characters in a GUI
    plUnicodeBuffer GetUnicodeArray() const;

    size_t GetSize() const { return fUtf8Buffer.GetSize(); }
    bool IsEmpty() const { return fUtf8Buffer.GetSize() == 0; }

    // TODO: Evaluate whether Plasma actually needs to distinguish between
    // empty and NULL strings.  Ideally, only IsEmpty should be required.
    bool IsNull() const { return IsEmpty(); }

    int ToInt(int base = 0) const;
    unsigned int ToUInt(int base = 0) const;
    float ToFloat() const;
    double ToDouble() const;

    static plString Format(const char *fmt, ...);
    static plString IFormat(const char *fmt, va_list vptr);

    enum CaseSensitivity {
        kCaseSensitive, kCaseInsensitive
    };

    int Compare(const plString &str, CaseSensitivity sense = kCaseSensitive) const
    {
        return (sense == kCaseSensitive) ? strcmp(c_str(), str.c_str())
                                         : stricmp(c_str(), str.c_str());
    }

    int Compare(const char *str, CaseSensitivity sense = kCaseSensitive) const
    {
        return (sense == kCaseSensitive) ? strcmp(c_str(), str)
                                         : stricmp(c_str(), str);
    }

    int CompareN(const plString &str, size_t count, CaseSensitivity sense = kCaseSensitive) const
    {
        return (sense == kCaseSensitive) ? strncmp(c_str(), str.c_str(), count)
                                         : strnicmp(c_str(), str.c_str(), count);
    }

    int CompareN(const char *str, size_t count, CaseSensitivity sense = kCaseSensitive) const
    {
        return (sense == kCaseSensitive) ? strncmp(c_str(), str, count)
                                         : strnicmp(c_str(), str, count);
    }

    int CompareI(const plString &str) const { return Compare(str, kCaseInsensitive); }
    int CompareI(const char *str) const { return Compare(str, kCaseInsensitive); }
    int CompareNI(const plString &str, size_t count) const { return CompareN(str, count, kCaseInsensitive); }
    int CompareNI(const char *str, size_t count) const { return CompareN(str, count, kCaseInsensitive); }

    bool operator<(const plString &other) const { return Compare(other) < 0; }
    bool operator==(const char *other) const { return Compare(other) == 0; }
    bool operator==(const plString &other) const { return Compare(other) == 0; }
    bool operator!=(const char *other) const { return Compare(other) != 0; }
    bool operator!=(const plString &other) const { return Compare(other) != 0; }

    int Find(char ch, CaseSensitivity sense = kCaseSensitive) const;
    int FindLast(char ch, CaseSensitivity sense = kCaseSensitive) const;

    int Find(const char *str, CaseSensitivity sense = kCaseSensitive) const;
    int Find(const plString &str, CaseSensitivity sense = kCaseSensitive) const
    { return Find(str.c_str(), sense); }

    plString TrimLeft(const char *charset = WHITESPACE_CHARS) const;
    plString TrimRight(const char *charset = WHITESPACE_CHARS) const;
    plString Trim(const char *charset = WHITESPACE_CHARS) const;

    plString Substr(int start, size_t size = kSizeAuto) const;
    plString Left(size_t size) const { return Substr(0, size); }
    plString Right(size_t size) const { return Substr(GetSize() - size, size); }

    // NOTE:  Does Compare(blah, kCaseInsensitive) make more sense?  If
    //        so, use that instead -- it's faster and more efficient!
    plString ToUpper() const;
    plString ToLower() const;

    // Should replace other tokenization methods.  The difference between Split
    // and Tokenize is that Tokenize never returns a blank string (it strips
    // all delimiters and only returns the pieces left between them), whereas
    // Split will split on a full string, returning whatever is left between.
    std::vector<plString> Split(const char *split, size_t maxSplits = kSizeAuto) const;
    std::vector<plString> Tokenize(const char *delims = WHITESPACE_CHARS) const;

    static plString Fill(size_t count, char c);

public:
    struct less
    {
        bool operator()(const plString &_L, const plString &_R) const
        { return _L.Compare(_R, kCaseSensitive) < 0; }
    };

    struct less_i
    {
        bool operator()(const plString &_L, const plString &_R) const
        { return _L.Compare(_R, kCaseInsensitive) < 0; }
    };

    struct equal
    {
        bool operator()(const plString &_L, const plString &_R) const
        { return _L.Compare(_R, kCaseSensitive) == 0; }
    };

    struct equal_i
    {
        bool operator()(const plString &_L, const plString &_R) const
        { return _L.Compare(_R, kCaseInsensitive) == 0; }
    };

private:
    friend plString operator+(const plString &left, const plString &right);
    friend plString operator+(const plString &left, const char *right);
    friend plString operator+(const char *left, const plString &right);
};

plString operator+(const plString &left, const plString &right);
plString operator+(const plString &left, const char *right);
plString operator+(const char *left, const plString &right);


class plStringStream
{
public:
    plStringStream() : fBufSize(256), fLength(0)
    {
        fBuffer = new char[fBufSize];
    }
    ~plStringStream() { delete [] fBuffer; }

    plStringStream &append(const char *data, size_t length);

    plStringStream &operator<<(const char *text);
    plStringStream &operator<<(int num);
    plStringStream &operator<<(unsigned int num);
    plStringStream &operator<<(char ch) { return append(&ch, 1); }

    plStringStream &operator<<(const plString &text)
    {
        return append(text.c_str(), text.GetSize());
    }

    size_t GetLength() const { return fLength; }
    plString GetString() { return plString::FromUtf8(fBuffer, fLength); }

private:
    char *fBuffer;
    size_t fBufSize;
    size_t fLength;
};

size_t ustrlen(const UniChar *ustr, size_t max = plString::kSizeAuto);

#endif //plString_Defined