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/******************************************************************************
** COPYRIGHT NOTICE
** (c) 2012 The Johns Hopkins University Applied Physics Laboratory
** All rights reserved.
**
** This material may only be used, modified, or reproduced by or for the
** U.S. Government pursuant to the license rights granted under
** FAR clause 52.227-14 or DFARS clauses 252.227-7013/7014
**
** For any other permissions, please contact the Legal Office at JHU/APL.
******************************************************************************/
/*****************************************************************************
**
** File Name: expr.h
**
** Description: This file contains the definitions, prototypes, constants, and
** other information necessary for DTNMP actors to construct and
** evaluate expressions.
**
** Notes:
**
** Assumptions:
** 1. For the time being, we only support unsigned long as a data type.
** 2. For the time being, we assume operators are binary operators.
**
** Modification History:
** MM/DD/YY AUTHOR DESCRIPTION
** -------- ------------ ---------------------------------------------
** 07/28/13 E. Birrane Initial Implementation
*****************************************************************************/
#ifndef EXPR_H_
#define EXPR_H_
#include "ion_if.h"
#include "nm_types.h"
#include "shared/primitives/mid.h"
/* 3 bits */
#define EXPR_TYPE_INT32 0
#define EXPR_TYPE_UINT32 1
#define EXPR_TYPE_VAST 2
#define EXPR_TYPE_UVAST 3
#define EXPR_TYPE_REAL32 4
#define EXPR_TYPE_REAL64 5
#define EXPR_TYPE_BLOB 6
#define EXPR_TYPE_STRING 7
/*
Literal... I need to know
: Type
: Value (pre-defined or in the OID structure.)
OID reserved for LITERAL. Parm 1 is type. Parm 2 is value.
Operator I need to know: This can be hard-coded to MID/OID.
- Operands (1, 2, 3)
- Result type
*/
typedef struct
{
int type;
uint8_t *value;
uint64_t length;
} expr_result_t;
expr_result_t *expr_get_value(mid_t *mid);
expr_result_t *expr_apply_binary_op(mid_t *op, expr_result_t *expr1, expr_result_t *expr2);
expr_result_t *expr_eval(Lyst expr);
void expr_release(expr_result_t result);
#endif /* EXPR_H_ */
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