94 lines
4.0 KiB
C++
94 lines
4.0 KiB
C++
#ifndef HGL_IO_FILE_OUTPUT_STREAM_INCLUDE
|
|
#define HGL_IO_FILE_OUTPUT_STREAM_INCLUDE
|
|
|
|
#include<hgl/io/OutputStream.h>
|
|
#include<hgl/io/FileAccess.h>
|
|
namespace hgl
|
|
{
|
|
namespace io
|
|
{
|
|
/**
|
|
* 文件输出流类
|
|
*/
|
|
class FileOutputStream:public OutputStream ///文件输出流类
|
|
{
|
|
protected:
|
|
|
|
SharedPtr<FileAccess> file; ///<文件访问指针
|
|
|
|
virtual bool OpenFile(const OSString &,FileOpenMode);
|
|
|
|
public:
|
|
|
|
FileOutputStream();
|
|
FileOutputStream(SharedPtr<FileAccess> &);
|
|
virtual ~FileOutputStream();
|
|
|
|
virtual bool Open(const OSString &fn,FileOpenMode mode){return OpenFile(fn,mode);} ///<打开文件，指定一个模式
|
|
virtual bool Open(const OSString &fn){return OpenFile(fn,fomOnlyWrite);} ///<打开文件
|
|
virtual bool Create(const OSString &fn){return OpenFile(fn,fomCreate);} ///<创建文件，如存在创建失败
|
|
virtual bool CreateTrunc(const OSString &fn){return OpenFile(fn,fomCreateTrunc);} ///<创建文件，如存在则抹去
|
|
virtual bool OpenAppend(const OSString &fn){return OpenFile(fn,fomAppend);} ///<打开文件，追加模式
|
|
|
|
virtual void Close(); ///<关闭文件
|
|
|
|
virtual int64 Write(const void *,int64); ///<写入数据
|
|
|
|
virtual bool CanSeek()const; ///<是否可移动访问指针
|
|
virtual bool CanRestart()const; ///<是否可复位访问
|
|
virtual bool CanSize()const; ///<是否可访问文件长度
|
|
|
|
virtual int64 Tell()const; ///<取当前位置
|
|
virtual int64 GetSize()const; ///<取得文件长度
|
|
virtual bool Restart(); ///<复位访问指针
|
|
virtual int64 Seek(int64,SeekOrigin=SeekOrigin::Begin); ///<移动访问指针
|
|
virtual int64 Available()const{return -1;} ///<可不受影响写入的字节数
|
|
|
|
virtual int64 Write(int64,const void *,int64); ///<在指定位置写入指定长度的数据
|
|
};//class FileOutputStream
|
|
|
|
/**
|
|
* 打开一个文件输出流
|
|
*/
|
|
class OpenFileOutputStream
|
|
{
|
|
FileOutputStream *fos;
|
|
|
|
public:
|
|
|
|
OpenFileOutputStream()
|
|
{
|
|
fos=nullptr;
|
|
}
|
|
|
|
/**
|
|
* 打开一个文件输出流构造函数
|
|
* @param filename 文件名
|
|
* @param mode 打开模式，默认只写(必然可读)
|
|
* @see FileOpenMode
|
|
*/
|
|
OpenFileOutputStream(const OSString &filename,FileOpenMode mode=fomOnlyWrite)
|
|
{
|
|
fos=new FileOutputStream();
|
|
|
|
if(!fos->Open(filename,mode))
|
|
{
|
|
delete fos;
|
|
fos=nullptr;
|
|
}
|
|
}
|
|
|
|
~OpenFileOutputStream()
|
|
{
|
|
SAFE_CLEAR(fos);
|
|
}
|
|
|
|
const bool operator !(){return !fos;}
|
|
operator FileOutputStream *(){return fos;}
|
|
FileOutputStream *operator &(){return fos;}
|
|
FileOutputStream *operator ->(){return fos;}
|
|
};//class OpenFileInputStream
|
|
}//namespace io
|
|
}//namespace hgl
|
|
#endif//HGL_IO_FILE_OUTPUT_STREAM_INCLUDE
|