BINOPEN()

Purpose

Function to open a binary file

Syntax

BINOPEN(<expC>,<expN>)

See Also

BIN2I(), BIN2L(), BIN2W(), BINCLOSE(), BINCREATE(), BINFILETOSTR(), BINREAD(), BINSEEK(), BINSTRTOFILE(), BINWRITE(), FCLOSE(), FOPEN(), I2BIN(), L2BIN()

Description

The BINOPEN() function opens an existing binary file. The <expC> is the name of the file to be opened. The <expN> is the mode in which the file will be opened. The open mode options are:

Mode	Description
0	Read-only
1	Write-only
2	Read/write

BINOPEN() returns a file descriptor if it has opened the file successfully, or a -1 if unsuccessful. Since the file descriptor is used to identify open binary files, the BINOPEN() return value should always be assigned to a memory variable. The binary conversion functions may be used in conjunction with the binary file functions.

Example

fd = binopen("file.obj", 2)
count = binread(fd, 4)
count = bin2l(count)
count = l2bin(count + 1)
binseek(fd, 512, 0)
binwrite(fd, count)
binclose(fd)