Page 104 - DCAP507_SYSTEM_SOFTWARE

System Software

Notes  The position notation is utilized for the parameters. The parameter &INDEV has been
transformed to ?1, &BUFADR has been converted to ?2.

 When the ?n notation is renowned in a line from DEFTAB, a simple indexing operation
provides the property argument from ARGTAB.

Algorithm:

 The procedure DEFINE, which is called when the start of a macro definition is recognized,
makes the suitable entries in DEFTAB and NAMTAB.

 EXPAND is called to set up the argument values in ARGTAB and expand macro invocation
statement.
 The procedure GETLINE gets the next line to be processed.

 This line may occur from DEFTAB or from the input file, based upon whether the Boolean
variable EXPANDING is set to TRUE or FALSE.

Contd...

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