Difference between revisions of "BINOPEN()"

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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:
 
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:
  
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Revision as of 12:12, 1 February 2013

Purpose

Function to open a binary file

Syntax

BINOPEN([<expC>,<expN>])

See Also

BIN2I(), BIN2L(), BIN2W(), BINCLOSE(), BINCREATE(), BINREAD(), BINSEEK(), 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")
count = binread(fd, 4)
count = bin2l(count)
count = l2bin(count + 1)
binseek(fd, 512, 0)
binwrite(fd, count)
binclose(fd)