Intel 05-1832-002 User Manual

208

open a file

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! Description

The dx_fileopen( ) function opens a file specified by filep, and prepares the file for reading and 
writing, as specified by flags. See the _open function in the Microsoft Visual C++ Run-Time 
Library Reference for more information.

Use dx_fileopen( ) instead of _open to ensure the compatibility of applications with the libraries 
across various versions of Visual C++.

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! Cautions

When using 

 to record WAVE files, you cannot use the O_APPEND mode with 

dx_fileopen( ), because for each record, a WAVE file header will be created. 

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! Errors

If this function returns -1 to indicate failure, a system error has occurred; use dx_fileerrno( ) to 
obtain the system error value. Refer to the dx_fileerrno( ) function for a list of the possible system 
error values.

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! Example

/* Play a voice file. Terminate on receiving 4 digits or at end of file*/

#include <fcntl.h>

#include <srllib.h>

#include <dxxxlib.h>

#include <windows.h>

int dx_fileopen(filep, flags, pmode)

const char *filep

filename

int flags

type of operations allowed

int pmode

permission mode

file handle if success
-1 if failure

srllib.h
dxxxlib.h

File Manipulation

synchronous

DM3, Springware