// mk4str.h --
// $Id$
// This is part of Metakit, see http://www.equi4.com/metakit/

/** @file
 * Declarations of the string package.
 */

#ifndef __MK4STR_H__
#define __MK4STR_H__

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

#if defined(q4_MFC)                      // Microsoft Foundation Classes

#if defined(_WINDOWS)
#include <afxwin.h>
#else
#include <afxcoll.h>
#endif

#if defined(_MSC_VER) && (_MSC_VER == 800)
// MSVC 1.52 thinks a typedef has no constructor, use define instead
#define c4_String CString
#elif defined(_MSC_VER) && (_MSC_VER >= 1300)
// VC 7.0 does not like "class" (6-2-2002, Zhang Dehua)
typedef CString c4_String;
#else
typedef class CString c4_String;
#endif

#elif defined(q4_STD)                    // STL and standard strings

#include <string>

#if !defined (d4_std)           // the default is to use namespaces
#define d4_std std
#endif

    /// STL-based string class, modeled after the MFC version
class c4_String : public d4_std::string
{
    typedef d4_std::string string;

public:
    c4_String ();
    c4_String (char ch, int nDup =1);
    c4_String (const char* str);
    c4_String (const void* ptr, int len);
    c4_String (const d4_std::string& s);
    c4_String (const c4_String& s);
    ~c4_String ();

    const c4_String& operator= (const c4_String&);

    operator const char* () const;

    char operator[] (int i) const;
    
    friend c4_String operator+ (const c4_String&, const c4_String&);
    friend c4_String operator+ (const c4_String&, const char*);
    friend c4_String operator+ (const char*, const c4_String&);

    const c4_String& operator+= (const c4_String& s);
    const c4_String& operator+= (const char* s);
    
    int GetLength() const;
    bool IsEmpty() const;
    void Empty();
    
    c4_String Mid(int nFirst, int nCount =25000) const;
    c4_String Left(int nCount) const;
    c4_String Right(int nCount) const;
                    
    int Compare(const char* str) const;
    int CompareNoCase(const char* str) const;
    
    bool operator< (const c4_String& str) const;

    int Find(char ch) const;
    int ReverseFind(char ch) const;
    int FindOneOf(const char* set) const;
    
    int Find(const char* sub) const;
    
    c4_String SpanIncluding(const char* set) const;
    c4_String SpanExcluding(const char* set) const;
};

bool operator== (const c4_String&, const c4_String&);
bool operator!= (const c4_String&, const c4_String&);
    
d4_inline bool operator== (const c4_String& s1, const char* s2);
d4_inline bool operator== (const char* s1, const c4_String& s2);

d4_inline bool operator!= (const c4_String& s1, const char* s2);
d4_inline bool operator!= (const char* s1, const c4_String& s2);

#else                           // Universal replacement classes

    /// An efficient string class, modeled after the MFC version
class c4_String
{
public:
    c4_String ();
    c4_String (char ch, int nDup =1);
    c4_String (const char* str);
    c4_String (const unsigned char* str);
    c4_String (const void* ptr, int len);
    c4_String (const c4_String& s);
    ~c4_String ();

    const c4_String& operator= (const c4_String&);

    operator const char* () const;
    operator const unsigned char* () const;
    
    char operator[] (int i) const;
    
    friend c4_String operator+ (const c4_String&, const c4_String&);
    friend c4_String operator+ (const c4_String&, const char*);
    friend c4_String operator+ (const char*, const c4_String&);
//  friend c4_String operator+ (const c4_String&, char);
//  friend c4_String operator+ (char, const c4_String&);

    const c4_String& operator+= (const c4_String& s);
    const c4_String& operator+= (const char* s);
//  const c4_String& operator+= (char c);
    
    int GetLength() const;
    bool IsEmpty() const;
    void Empty(); // free up the data
    
    c4_String Mid(int nFirst, int nCount =25000) const;
    c4_String Left(int nCount) const; // first nCount chars
    c4_String Right(int nCount) const; // last nCount chars
                    
    friend bool operator== (const c4_String&, const c4_String&); // memcmp
    friend bool operator!= (const c4_String&, const c4_String&); // opposite
    
        // only defined for strings having no zero bytes inside them:
        
    int Compare(const char* str) const; // strcmp
    int CompareNoCase(const char* str) const; // stricmp
    
    bool operator< (const c4_String& str) const;

    int Find(char ch) const; // strchr
    int ReverseFind(char ch) const; // strrchr
    int FindOneOf(const char* set) const; // strpbrk
    
    int Find(const char* sub) const; // strstr
    
    c4_String SpanIncluding(const char* set) const; // strspn
    c4_String SpanExcluding(const char* set) const; // strcspn
    
private:
    void Init(const void* p, int n);
    const char* Data() const;
    int FullLength() const;
    
    unsigned char* _value;
};

bool operator== (const c4_String& s1, const char* s2);
bool operator== (const char* s1, const c4_String& s2);

bool operator!= (const c4_String& s1, const char* s2);
bool operator!= (const char* s1, const c4_String& s2);

#endif // q4_MFC elif q4_STD else q4_UNIV

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

#if defined(q4_INLINE)
#include "mk4str.inl"
#endif

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

#endif // __MK4STR_H__
