File functions

File functions. More...

Functions
	fcreate (afile)
	Create a file on disk.
	fopen (afile)
	Open file.
	fseek (offset, origin)
	Reposition the read/write point in file.
	fread (char_no)
	Read from file.
	fwrite (data)
	Write to file.
	fclose ()
	Close file.

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Detailed Description

File functions.

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Function Documentation

fclose (   )

Close file. Close the previously opened file.

fcreate (  afile   )

Create a file on disk. Creates a file on disk with afile path and name. If the file already exists it will be overwritten with empty content. Parameters: afile  File to be created with complete path if not in Easy Control folder Example: fcreate("myfile.txt")

fopen (  afile   )

Open file. Open file afile. Allows full access for others. If the return value is 0 or greater, the function was successful and the value is the file handle of the opened file. A return value of -1 indicates that an error occurred. Only one file can be open at a time. Parameters: afile  File to be open Note: Do not forget to close the file using fclose() when you are done with it!! Example: fh=fopen("myfile")

fread (  char_no   )

Read from file. Read up to char_no characters (bytes) from the current position of the open file. Advances read/write point. Parameters: char_no  How many characters (bytes) to be read Example: a=fread(12)

fseek (  offset  , origin  )

Reposition the read/write point in file. Use fseek to reposition the read/write point in open file. Parameters: offset  Specifies the number of bytes from Origin where the file pointer should be positioned origin  Origin is a code with three possible values, denoting the beginning of the file, the end of the file, and the current position of the file pointer. Origin Action 0 The file pointer is positioned offset bytes from the beginning of the file. 1 The file pointer is positioned offset bytes from its current position. 2 The file pointer is positioned offset bytes from the end of the file. Example: fseek(215,0)

fwrite (  data   )

Write to file. Write data at the current position of the open file. Returns the number of bytes actually written. Advances read/write point. Parameters: data  Data to be written in file Example: t=fwrite("testing 123"&chr(13)&chr(10))

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