Difference between revisions of "BINOPEN()"

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==See Also==
 
==See Also==
[[BIN2I()]], [[BIN2L()]], [[BIN2W]], [[BINCLOSE()]], [[BINCREATE()]], [[BINREAD()]], [[BINSEEK()]], [[BINWRITE()]], [[FCLOSE()]], [[FOPEN()]], [[I2BIN()]], [[L2BIN()]]
+
[[BIN2I()]], [[BIN2L()]], [[BIN2W()]], [[BINCLOSE()]], [[BINCREATE()]], [[BINREAD()]], [[BINSEEK()]], [[BINWRITE()]], [[FCLOSE()]], [[FOPEN()]], [[I2BIN()]], [[L2BIN()]]
  
  

Revision as of 12:20, 24 March 2009

Class

Binary File Access


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)


Products

Recital Database Server, Recital Mirage Server, Recital Terminal Developer