/*
 * 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 the Free Software Foundation; either version 2
 * of the License, or (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, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 */

/** \file
 * \ingroup string
 */

#ifndef __STR_STRING_H__
#define __STR_STRING_H__

#ifndef STR_NO_ASSERTD
#  undef assertd
#  define assertd(exp) ((void)NULL)
#endif

#include <limits.h>
#include <vector>

#include <cstdlib>
#include <cstring>

#ifdef WITH_CXX_GUARDEDALLOC
#  include "MEM_guardedalloc.h"
#endif

#ifdef _WIN32
#  define stricmp _stricmp
#endif

class STR_String;

typedef unsigned long dword;
typedef const STR_String &rcSTR_String;
typedef unsigned char byte;

/**
 * Smart String Value class. Is used by parser when an expression tree is build containing string.
 */

class STR_String {
 public:
  // Initialization
  STR_String();
  STR_String(char c);
  STR_String(char c, int len);
  STR_String(const char *str);
  STR_String(const char *str, int len);
  STR_String(const STR_String &str);
  STR_String(const STR_String &str, int len);
  STR_String(const char *src1, int src1_len, const char *src2, int src2_len);
  explicit STR_String(int val);
  explicit STR_String(dword val);
  explicit STR_String(float val);
  explicit STR_String(double val);
  inline ~STR_String()
  {
    delete[] this->m_data;
  }

  // Operations
  STR_String &Format(const char *fmt, ...)  // Set formatted text to string
#ifdef __GNUC__
      __attribute__((format(printf, 2, 3)))
#endif
      ;
  STR_String &FormatAdd(const char *fmt, ...)  // Add formatted text to string
#ifdef __GNUC__
      __attribute__((format(printf, 2, 3)))
#endif
      ;
  inline void Clear()
  {
    this->m_len = this->m_data[0] = 0;
  }
  inline const STR_String &Reverse()
  {
    for (int i1 = 0, i2 = this->m_len - 1; i1 < i2; i1++, i2--) {
      std::swap(this->m_data[i1], this->m_data[i2]);
    }
    return *this;
  }

  // Properties
  bool IsUpper() const;
  bool IsLower() const;
  inline bool IsEmpty() const
  {
    return this->m_len == 0;
  }
  inline int Length() const
  {
    return this->m_len;
  }

  // Data access
  inline STR_String &SetLength(int len)
  {
    AllocBuffer(len, true);
    this->m_len = len;
    this->m_data[len] = 0;
    return *this;
  }
  inline char GetAt(int pos) const
  {
    assertd(pos < this->m_len);
    return this->m_data[pos];
  }
  inline void SetAt(int pos, char c)
  {
    assertd(pos < this->m_len);
    this->m_data[pos] = c;
  }
  inline void SetAt(int pos, rcSTR_String str);
  inline void SetAt(int pos, int num, rcSTR_String str);
  void Replace(int pos, rcSTR_String str);
  void Replace(int pos, int num, rcSTR_String str);

  // Substrings
  inline STR_String Left(int num) const
  {
    num = (num < this->m_len ? num : this->m_len);
    return STR_String(this->m_data, num);
  }
  inline STR_String Right(int num) const
  {
    num = (num < this->m_len ? num : this->m_len);
    return STR_String(this->m_data + this->m_len - num, num);
  }
  inline STR_String Mid(int pos, int num = INT_MAX) const
  {
    pos = (pos < this->m_len ? pos : this->m_len);
    num = (num < (this->m_len - pos) ? num : (this->m_len - pos));
    return STR_String(this->m_data + pos, num);
  }

  // Comparison
  int Compare(rcSTR_String rhs) const;
  int CompareNoCase(rcSTR_String rhs) const;
  inline bool IsEqual(rcSTR_String rhs) const
  {
    return (Compare(rhs) == 0);
  }
  inline bool IsEqualNoCase(rcSTR_String rhs) const
  {
    return (CompareNoCase(rhs) == 0);
  }

  // Search/replace
  int Find(char c, int pos = 0) const;
  int Find(const char *str, int pos = 0) const;
  int Find(rcSTR_String str, int pos = 0) const;
  int RFind(char c) const;
  int FindOneOf(const char *set, int pos = 0) const;
  int RFindOneOf(const char *set, int pos = 0) const;

  std::vector<STR_String> Explode(char c) const;

  // Formatting
  STR_String &Upper();
  STR_String &Lower();
  STR_String &Capitalize();
  STR_String &TrimLeft();
  STR_String &TrimLeft(char *set);
  STR_String &TrimRight();
  STR_String &TrimRight(char *set);
  STR_String &Trim();
  STR_String &Trim(char *set);
  STR_String &TrimQuotes();

  // Conversions
  //  inline operator char*()                             { return this->m_data; }
  inline operator const char *() const
  {
    return this->m_data;
  }
  inline char *Ptr()
  {
    return this->m_data;
  }
  inline const char *ReadPtr() const
  {
    return this->m_data;
  }
  inline float ToFloat() const
  {
    float x = (float)(atof(this->m_data));
    return x;
  }
  inline int ToInt() const
  {
    return atoi(this->m_data);
  }

  // Operators
  inline rcSTR_String operator=(const byte *rhs)
  {
    return Copy((const char *)rhs, strlen((const char *)rhs));
  }
  inline rcSTR_String operator=(rcSTR_String rhs)
  {
    return Copy(rhs.ReadPtr(), rhs.Length());
  }
  inline rcSTR_String operator=(char rhs)
  {
    return Copy(&rhs, 1);
  }
  inline rcSTR_String operator=(const char *rhs)
  {
    return Copy(rhs, strlen(rhs));
  }

  inline rcSTR_String operator+=(const char *rhs)
  {
    return Concat(rhs, strlen(rhs));
  }
  inline rcSTR_String operator+=(rcSTR_String rhs)
  {
    return Concat(rhs.ReadPtr(), rhs.Length());
  }
  inline rcSTR_String operator+=(char rhs)
  {
    return Concat(&rhs, 1);
  }

  inline friend bool operator<(rcSTR_String lhs, rcSTR_String rhs)
  {
    return (strcmp(lhs, rhs) < 0);
  }
  inline friend bool operator<(rcSTR_String lhs, const char *rhs)
  {
    return (strcmp(lhs, rhs) < 0);
  }
  inline friend bool operator<(const char *lhs, rcSTR_String rhs)
  {
    return (strcmp(lhs, rhs) < 0);
  }
  inline friend bool operator>(rcSTR_String lhs, rcSTR_String rhs)
  {
    return (strcmp(lhs, rhs) > 0);
  }
  inline friend bool operator>(rcSTR_String lhs, const char *rhs)
  {
    return (strcmp(lhs, rhs) > 0);
  }
  inline friend bool operator>(const char *lhs, rcSTR_String rhs)
  {
    return (strcmp(lhs, rhs) > 0);
  }
  inline friend bool operator<=(rcSTR_String lhs, rcSTR_String rhs)
  {
    return (strcmp(lhs, rhs) <= 0);
  }
  inline friend bool operator<=(rcSTR_String lhs, const char *rhs)
  {
    return (strcmp(lhs, rhs) <= 0);
  }
  inline friend bool operator<=(const char *lhs, rcSTR_String rhs)
  {
    return (strcmp(lhs, rhs) <= 0);
  }
  inline friend bool operator>=(rcSTR_String lhs, rcSTR_String rhs)
  {
    return (strcmp(lhs, rhs) >= 0);
  }
  inline friend bool operator>=(rcSTR_String lhs, const char *rhs)
  {
    return (strcmp(lhs, rhs) >= 0);
  }
  inline friend bool operator>=(const char *lhs, rcSTR_String rhs)
  {
    return (strcmp(lhs, rhs) >= 0);
  }
  inline friend bool operator==(rcSTR_String lhs, rcSTR_String rhs)
  {
    return ((lhs.Length() == rhs.Length()) && (memcmp(lhs, rhs, lhs.Length()) == 0));
  }
  inline friend bool operator==(rcSTR_String lhs, const char *rhs)
  {
    return (strncmp(lhs, rhs, lhs.Length() + 1) == 0);
  }
  inline friend bool operator==(const char *lhs, rcSTR_String rhs)
  {
    return (strncmp(lhs, rhs, rhs.Length() + 1) == 0);
  }
  inline friend bool operator!=(rcSTR_String lhs, rcSTR_String rhs)
  {
    return ((lhs.Length() != rhs.Length()) || (memcmp(lhs, rhs, lhs.Length()) != 0));
  }
  inline friend bool operator!=(rcSTR_String lhs, const char *rhs)
  {
    return (strncmp(lhs, rhs, lhs.Length() + 1) != 0);
  }
  inline friend bool operator!=(const char *lhs, rcSTR_String rhs)
  {
    return (strncmp(lhs, rhs, rhs.Length() + 1) != 0);
  }

  // serializing
  // int           Serialize(pCStream stream);

 protected:
  // Implementation
  void AllocBuffer(int len, bool keep_contents);
  rcSTR_String Copy(const char *src, int len);
  rcSTR_String Concat(const char *data, int len);

  static bool isLower(char c)
  {
    return !isUpper(c);
  }
  static bool isUpper(char c)
  {
    return (c >= 'A') && (c <= 'Z');
  }
  static bool isSpace(char c)
  {
    return (c == ' ') || (c == '\t');
  }

  char *m_data;  // -> STR_String data
  int m_len;     // z Data length
  int m_max;     // Space in data buffer

#ifdef WITH_CXX_GUARDEDALLOC
  MEM_CXX_CLASS_ALLOC_FUNCS("CXX:STR_String")
#endif
};

inline STR_String operator+(rcSTR_String lhs, rcSTR_String rhs)
{
  return STR_String(lhs.ReadPtr(), lhs.Length(), rhs.ReadPtr(), rhs.Length());
}
inline STR_String operator+(rcSTR_String lhs, char rhs)
{
  return STR_String(lhs.ReadPtr(), lhs.Length(), &rhs, 1);
}
inline STR_String operator+(char lhs, rcSTR_String rhs)
{
  return STR_String(&lhs, 1, rhs.ReadPtr(), rhs.Length());
}
inline STR_String operator+(rcSTR_String lhs, const char *rhs)
{
  return STR_String(lhs.ReadPtr(), lhs.Length(), rhs, strlen(rhs));
}
inline STR_String operator+(const char *lhs, rcSTR_String rhs)
{
  return STR_String(lhs, strlen(lhs), rhs.ReadPtr(), rhs.Length());
}

#endif  //__STR_STRING_H__