【IT168 技术文章】

    一、实例
    在《CPPUNIT基本原理》中举了一个简单的例子，在这个实例的基础上，另外写了一个稍微复杂的例子用作 cppunit的测试

    这个实例包含一个Write2File cpp，一个Write2File h文件，功能是实现从一个文件复制内容到另一个文件。具体实现如下：

    Write2File.cpp的代码：

    #include "Write2File.h" 

    Write2File::Write2File()

    {

    }

    Write2File::~Write2File()

    {

    }

    int Write2File::Process()        //主过程

    {

            ReadCfgFile( );

            if( ReadFileSrc() )

            {

            return -1;

            }

            if( WriteFileOut() )

            {

            return -1;

            }

            return 0;

    }

    int Write2File::ReadCfgFile()         //这个函数本来是想实现从配置文件中获取输出目录和输出目录的，后来简化了这段代码，直接将路径赋值给变量了。

    {

            strcpy( SrcPath , m_srcp );

            strcpy( OutPath , m_outp );

            return 0;

    }

    int Write2File::ReadFileSrc()         //读取源文件的内容

    {

            FILE *fp = NULL;

            memset( SrcFilename , 0 ,sizeof( SrcFilename ) );

            sprintf( SrcFilename , "%s/test_src.txt" , SrcPath );

            if( ( fp = fopen( SrcFilename , "r" ) ) == NULL )

            {

            printf( "Open srcfile error :%s\n" , SrcFilename );

           return -1;     

            }

            fnum = stat(SrcFilename,&statbuf);

            if( fnum < 0 )  

            {  

            printf("there   need   size   of   file\n");  
   
            }

            fnum = statbuf.st_size;         //源文件的大小

            fread( m_Buf , statbuf.st_size, 1 , fp );

            fclose( fp );

            return 0;

    }

    int Write2File::WriteFileOut()         //将读取的内容输入到输出文件

    {

            FILE *fp = NULL;

            memset( OutFilename , 0 , sizeof(OutFilename ) );

            sprintf( OutFilename , "%s/test_out.txt", OutPath );

            if( access(OutFilename , F_OK) == 0 ) unlink( OutFilename );

            if( ( fp = fopen(OutFilename , "a+") ) == NULL )

            {

            printf("Read file %s error!\n",OutFilename );

            return -1;

            }

            fwrite( m_Buf , statbuf.st_size , 1 , fp );
   
            fclose( fp );

            return 0;

    }

    int main(int argc , const char **argv)         

    {

            Write2File writefile;

            if( argc!=3 )

            {

                    printf( "ERROR,Example: Write2File srcpath outpath \n" );

                    return -1;

            }

            m_argc = argc;

            strcpy( m_srcp , argv[1] );

            strcpy( m_outp , argv[2] );
   
            //m_srcp = argv;

            writefile.Process();

            return 0;

    }

    Write2File.h的代码：

    #include <stdlib.h>

    #include <math.h>

    #include <iostream.h>

    #include <unistd.h>

    #include <sys/stat.h>

    #include <sstream>

    class Write2File

    {

    public:

            Write2File();

            ~Write2File();

    public:

            char m_Buf[m_BufSize];

    //protected:

            int ReadCfgFile();

            int Process();

            int ReadFileSrc();

            int WriteFileOut();

            char SrcPath[256];

            char OutPath[256];

            char SrcFilename[256];

            char OutFilename[256];

            char Logfile[256];

            char Logfilepath[256];

            char Logfilename[256];

            struct   stat   statbuf; 

            int fnum;

    };

            int m_argc;

        char m_srcp[256];

        char m_outp[256];