一个开源的sip源代码

				/* $Id: file.hpp 122 2006-01-18 23:32:27Z bennylp $  */
				/* 
				 * Copyright (C)2003-2006 Benny Prijono 
				 *
				 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
				 */
				#ifndef __PJPP_FILE_HPP__
				#define __PJPP_FILE_HPP__
				
				#include 
				#include 
				#include 
				#include 
				
				//
				// File API.
				//
				class Pj_File_API
				{
				public:
				    //
				    // Check file existance.
				    //
				    static bool file_exists(const char *filename)
				    {
				        return pj_file_exists(filename) != 0;
				    }
				
				    //
				    // Get file size.
				    //
				    static pj_off_t file_size(const char *filename)
				    {
				        return pj_file_size(filename);
				    }
				
				    //
				    // Delete file.
				    //
				    static pj_status_t file_delete(const char *filename)
				    {
				        return pj_file_delete(filename);
				    }
				
				    //
				    // Move/rename file.
				    //
				    static pj_status_t file_move(const char *oldname, const char *newname)
				    {
				        return pj_file_move(oldname, newname);
				    }
				
				    //
				    // Get stat.
				    //
				    static pj_status_t file_stat(const char *filename, pj_file_stat *buf)
				    {
				        return pj_file_getstat(filename, buf);
				    }
				};
				
				
				//
				// File.
				//
				class Pj_File : public Pj_Object
				{
				public:
				    //
				    // Offset type to be used in setpos.
				    //
				    enum Offset_Type
				    {
				        PJ_SEEK_SET = PJ_SEEK_SET,
				        PJ_SEEK_CUR = PJ_SEEK_CUR,
				        PJ_SEEK_END = PJ_SEEK_END,
				    };
				
				    //
				    // Default constructor.
				    //
				    Pj_File()
				        : hnd_(0)
				    {
				    }
				
				    //
				    // Construct and open a file.
				    //
				    Pj_File(Pj_Pool *pool, const char *filename,
				            unsigned access = PJ_O_RDONLY)
				    : hnd_(NULL)
				    {
				        open(pool, filename, access);
				    }
				
				    //
				    // Destructor closes the file.
				    //
				    ~Pj_File()
				    {
				        close();
				    }
				
				    //
				    // Open a file.
				    //
				    pj_status_t open(Pj_Pool *pool, const char *filename, 
				                     unsigned access = PJ_O_RDONLY )
				    {
				        close();
				        return pj_file_open(pool->pool_(), filename, access, &hnd_);
				    }
				
				    //
				    // Close a file.
				    //
				    void close()
				    {
				        if (hnd_ != 0) {
				            pj_file_close(hnd_);
				            hnd_ = 0;
				        }
				    }
				
				    //
				    // Write data.
				    //
				    pj_ssize_t write(const void *buff, pj_size_t size)
				    {
				        pj_ssize_t bytes = size;
				        if (pj_file_write(hnd_, buff, &bytes) != PJ_SUCCESS)
				            return -1;
				        return bytes;
				    }
				
				    //
				    // Read data.
				    //
				    pj_ssize_t read(void *buf, pj_size_t size)
				    {
				        pj_ssize_t bytes = size;
				        if (pj_file_read(hnd_, buf, &bytes) != PJ_SUCCESS)
				            return -1;
				        return bytes;
				    }
				
				    //
				    // Set file position.
				    //
				    pj_status_t setpos(pj_off_t offset, Offset_Type whence)
				    {
				        return pj_file_setpos(hnd_, offset, 
				                              (enum pj_file_seek_type)whence);
				    }
				
				    //
				    // Get file position.
				    //
				    pj_off_t getpos()
				    {
				        pj_off_t pos;
				        if (pj_file_getpos(hnd_, &pos) != PJ_SUCCESS)
				            return -1;
				        return pos;
				    }
				
				private:
				    pj_oshandle_t hnd_;
				};
				
				
				
				#endif  /* __PJPP_FILE_HPP__ */