/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
*
*  ========================================================================
*
* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
*               DESCRIBE IT HERE!
*
****************************************************************************/


typedef union cs_info {
    struct do_entry     *do_parms;      // iterative DO-loop
    struct case_entry   *cases;         // SELECT statement and computed GOTO
    sym_id              rb;             // REMOTE BLOCKs
    unsigned_32         do_term;        // for DO WHILE
} cs_info;

typedef struct csnode {
    struct csnode       *link;
    union cs_info       cs_info;
    label_id            branch;
    label_id            bottom;
    label_id            cycle;
    unsigned_16         block;
    byte                typ;
    char                label;
} csnode;

typedef union cs_label {
    sym_id              st_label;
    label_id            g_label;
} cs_label;

typedef struct case_entry {
    struct case_entry   *link;
    union cs_label      label;
    intstar4            low;
    intstar4            high;
#if _OPT_CG == _ON
    sym_id              sel_expr;
#endif
    byte                sel_type;
    bool                multi_case;
} case_entry;

typedef struct do_entry {
    sym_id              do_parm;
    unsigned_32         do_term;
#if _OPT_CG == _OFF
    sym_id              do_cb;
    byte                do_type;
#else
    sym_id              increment;
    sym_id              iteration;
    intstar4            incr_value;
#endif
} do_entry;

enum {
    CS_EMPTY_LIST,
    CS_IF,
    CS_ELSEIF,
    CS_ELSE,
    CS_GUESS,
    CS_ADMIT,
    CS_SELECT,
    CS_CASE,
    CS_OTHERWISE,
    CS_ATEND,
    CS_REMOTEBLOCK,
    CS_LOOP,
    CS_WHILE,
    CS_DO,
    CS_COMPUTED_GOTO,
    CS_DO_WHILE
};
