Sometimes you need information about a variable beside the content of that variable. You want to know the length of the data inside the variable or the Data Type. There are some functions in ACL/E which were created for that purpose.
To get information about variables you can use three predefined function variables:
VDEFINE VAR,8 SET VAR,'HELLO' SET M,&MSIZE_OF(&VAR)
Variable &M will contain 8, the maximum possible length of variable &VAR, as defined in the VDEFINE statement.
VDEFINE VAR,10 SET VAR,'HELLO' SET S,&SIZE_OF(&VAR)
Variable &S will contain 5, the length of the value currently kept in variable &VAR
Note: The variable name must be entered without '&'.
Possible values are:
ARRAY Indicates that this is an array variable BIN Indicates that this is a binary variable. CHAR Indicates that this is a character variable. UPCHAR Indicates that this is an uppercase character variable. HEX Indicates that this is a hexadecimal variable. NOTRUNC Indicates that the variable will not be stripped of trailing blanks when substitution takes place. NUM Indicates that this is a numeric variable. UNDEFINED Indicates that this variable is not defined. This value can be attached to the ones above: ACL Indicates that the variable was defined in ACL/E
VDEFINE VAR,8,TYPE=CHAR SET VAR,'HELLO' SET T,&SIZE_OF(VAR) <--- without '&'
Variable &T will contain string 'CHAR ACL'.