convert.h

本人收集整理的一份c/c++跨平台网络库

#ifndef UTILS_BASE_CONVERT_H_
#define UTILS_BASE_CONVERT_H_

#ifdef WIN32

#include <string>
#include <windows.h>
#include <malloc.h>

#ifndef NO_ATL
#include <atlstr.h>
#endif // NO_ATL

#include "basictypes.h"

class Utf8 {
public:
#ifndef NO_ATL
	explicit Utf8(const CString & str) {
    *this = str;
  }
#else
	explicit Utf8(const wchar_t *str) {
	*this = str;
	}
#endif

  explicit Utf8() {}
#ifndef NO_ATL
  inline Utf8& operator =(const CString & str) {
    // TODO: deal with errors
    int len8 = WideCharToMultiByte(CP_UTF8, 0, str.GetString(), str.GetLength(),
                                   NULL, 0, NULL, NULL);
    char * ns = static_cast<char*>(_alloca(len8));
    WideCharToMultiByte(CP_UTF8, 0, str.GetString(), str.GetLength(),
                        ns, len8, NULL, NULL);
    str_.assign(ns, len8);
    return *this;
  }
#else
inline Utf8& operator =(const wchar_t *str) {
    // TODO: deal with errors
    int len8 = WideCharToMultiByte(CP_UTF8, 0, str, (int)wcslen(str),
                                   NULL, 0, NULL, NULL);
    char * ns = static_cast<char*>(_alloca(len8));
    WideCharToMultiByte(CP_UTF8, 0, str, (int)wcslen(str),
                        ns, len8, NULL, NULL);
    str_.assign(ns, len8);
    return *this;
  }
#endif // NO_ATL

  inline operator const std::string & () const {
    return str_;
  }

  inline const char * AsSz() const {
    return str_.c_str();
  }

  // Deprecated
  inline const std::string & AsString() const {
    return str_;
  }

  // Deprecated
  inline int Len8() const {
    return (int)str_.length();
  }

private:
  DISALLOW_EVIL_CONSTRUCTORS(Utf8);
  std::string str_;
};

class Utf16 {
public:
  explicit Utf16(const std::string & str) {
    // TODO: deal with errors
    int len16 = MultiByteToWideChar(CP_UTF8, 0, str.data(), -1,
                                    NULL, 0);
#ifndef NO_ATL
    wchar_t * ws = cstr_.GetBuffer(len16);
	MultiByteToWideChar(CP_UTF8, 0, str.data(), str.length(), ws, len16);
    cstr_.ReleaseBuffer(len16);
#else
	str_ = new wchar_t[len16];
	MultiByteToWideChar(CP_UTF8, 0, str.data(), -1, str_, len16);
#endif
  }

#ifndef NO_ATL
  inline operator const CString & () const {
    return cstr_;
  }
    // Deprecated
  inline const CString & AsCString() const {
    return cstr_;
  }
  // Deprecated
  inline int Len16() const {
    return cstr_.GetLength();
  }
  inline const wchar_t * AsWz() const {
    return cstr_.GetString();
  }
#else
  ~Utf16() {
    delete[] str_;
  }
  inline const wchar_t * AsWz() const {
    return str_;
  }
#endif

private:
  DISALLOW_EVIL_CONSTRUCTORS(Utf16);
#ifndef NO_ATL
  CString cstr_;
#else
  wchar_t *str_;
#endif
};

#endif //WIN32

#endif  // UTILS_BASE_CONVERT_H_