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读写文件

2018-06-17 21:32:31来源：未知阅读 ()

1.读文件

FILE *fp_in = NULL;
fp_in = fopen("test.h264", "rb");
if (!fp_in) 
{
    printf("Could not open input stream\n");
    return -1;
}

unsigned char *in_buffer;
in_buffer = new unsigned char[4096 * 4];

unsigned char *cur_ptr = NULL;
int cur_size = 0;

while (feof(fp_in) == 0)
{
    cur_size = fread(in_buffer, 1, 4096 * 4, fp_in);
    if (cur_size == 0)
        break;

    cur_ptr = in_buffer;

    //input_stream_data(cur_ptr, cur_size) ;

    Sleep(10);
}

fclose(fp_in);

delete[] in_buffer;
in_buffer = NULL;

2.写文件

写文件主要为以下：

FILE * outfile;
outfile = fopen("test.h264", "wb" );
if( outfile == NULL )
{
    printf("fopen error");
}   

fwrite( cur_ptr, sizeof( unsigned char ), cur_size, outfile );
    
fclose(outfile);

结合1、2,读写文件一起：

FILE *fp_in = NULL;
fp_in = fopen("test.h264", "rb");
if (!fp_in) 
{
    printf("Could not open input stream\n");
    return -1;
}

FILE * outfile;
outfile = fopen("out.h264", "wb" );
if( outfile == NULL )
{
    printf("fopen error");
} 

unsigned char *in_buffer;
in_buffer = new unsigned char[4096 * 4];

unsigned char *cur_ptr = NULL;
int cur_size = 0;

while (feof(fp_in) == 0)
{
    cur_size = fread(in_buffer, 1, 4096 * 4, fp_in);
    if (cur_size == 0)
        break;

    cur_ptr = in_buffer;

    fwrite( cur_ptr, sizeof( unsigned char ), cur_size, outfile );

    Sleep(10);
}

fclose(fp_in);
fclose(outfile);

delete[] in_buffer;
in_buffer = NULL;