STADF

Prolog  

Control Block Contents  
   STADF DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  

STADF Prolog

 Name       : HCPSTADF
 Description: Syntax state definition area
 DSECT      : STADF
 Function   : The STADF contains information that describes a state
              that the syntax checking is in.  It indicates whether
              a token match is optional or not.  STADF is used in
              conjunction with CONDF and TOKDF to define a syntax
              tree.
 Created by : invocation of the HCPDOSYN macro.
 References : None
 Comments   : Note that STADF entries are unaligned.
              This requires that all of the DSs that would normally
              enforce alignment (like A and F) must specify an
              explicit length attribute in order to skip alignment.

STADF Control Block Content

STADF DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      STADF          Syntax state definition area
0000    0 Signed       2 STATKNUM       Number of TOKDFs under this STADF
0002    2 Bitstring    1 STADFLAG       Flag to mark conversion type
          1... ....      STADFOPT       X'80' Token match is optional
          .1.. ....      STADTERM       X'40' No STADFs follow this one
          ..1. ....      STADVEND       X'20' This is a valid end state
          ...1 ....      STADONEM       X'10' At least one match required
0003    3 Bitstring    1 *              Spare byte
0004    4 Signed       2 STADFNXT       Transition to next state (offset)
0006    6 Signed       2 STADFNUM       State # (for syntax chkr)
0008    8 Signed       4 STAMSSNG       Message if token is missing
000C   12 Character    1 STA$END (0)    The end
          0000000C       STADFLEN       *-STADF Length of STADF entry

STADF Storage Layout

          
*** STADF - Syntax state definition area
*
*     +-------------+------+------+-------------+-------------+
*   0 |  STATKNUM   |:DFLAG|//////|  STADFNXT   |  STADFNUM   |
*     +-------------+------+------+-------------+-------------+
*   8 |         STAMSSNG          |
*     +---------------------------+
*
*** STADF - Syntax state definition area

STADF Cross Reference

Symbol         Dspl Value
-------------- ---- -----
STA$END        000C
STADFLAG       0002
STADFLEN       000C 0000000C
STADFNUM       0006
STADFNXT       0004
STADFOPT       0002 80
STADONEM       0002 10
STADTERM       0002 40
STADVEND       0002 20
STAMSSNG       0008
STATKNUM       0000