Mercurial > hg > ucx / file revision

# Stream Operations

UCX provides some utilities for routine tasks.

The most useful utilities are the *stream copy* functions, which provide a simple way to copy all - or a
bounded amount of - data from one stream to another. Since the read/write functions of a UCX buffer are
fully compatible with stream read/write functions, you can easily transfer data from file or network streams to
a UCX buffer or vice-versa.

The following example shows, how easy it is to read the contents of a file into a buffer:
```c
FILE *inputfile = fopen(infilename, "r");
if (inputfile) {
    CxBuffer fbuf;
    cxBufferInit(&fbuf, NULL, 4096, NULL, CX_BUFFER_AUTO_EXTEND);
    cx_stream_copy(inputfile, &fbuf,
                   (cx_read_func) fread,
                   cxBufferWriteFunc);
    fclose(inputfile);
    
    // ... do something meaningful with the contents ...
    
    cxBufferDestroy(&fbuf);
} else {
    perror("Error opening input file");
    if (fout != stdout) {
        fclose(fout);
    }
}
```

## Undocumented Symbols (TODO)
### cx_stream_bncopy
### cx_stream_ncopy