212 Chapter 5
Storing and Retrieving Test Results
Using the To/From File Objects
I/O Transaction Format
An I/O transaction to write data is usually in the following format:
<action> <encoding> <expression list> <format> <EOL>
Table 5-1 describes the most common actions: READ, WRITE, EXECUTE,
and WAIT.
Note There are also a number of actions for I/O ⇒ Advanced I/O
Operations that you can examine by exploring the objects in the menu.
Encodings and formats refer to the way data is packaged and sent. For
instance, a TEXT encoding sends data as ASCII characters. The TEXT
encoding could be formatted in a number of ways. For example, to send a
string of letters and numbers to a file, a
WRITE TEXT STRING transaction
would send the entire string represented by ASCII characters. A
WRITE
TEXT REAL
transaction would only extract the Real numbers from the same
string and send them using ASCII characters for the individual digits. Table
5-2 provides brief explanations of encodings.
Table 5-1. Types of I/O Transactions
Action Explanation
READ Reads data from the specified source using the specified
encoding and format.
WRITE Writes data to the specified target using the specified
encoding format.
EXECUTE Executes a specific command. For example, EXECUTE
REWIND repositions a file read or write pointer to the
beginning of the file without erasing the contents.
EXECUTE CLOSE closes an open file.
WAIT Waits the specified number of seconds before the next
transaction.
To Next Page
Loading...
Need help?
General
