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/* |
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* Expression Module |
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* by Tom Epperly |
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* Version: $Revision: 1.11 $ |
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* Version control file: $RCSfile: exprs.h,v $ |
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* Date last modified: $Date: 1998/02/05 16:36:00 $ |
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* Last modified by: $Author: ballan $ |
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* |
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* This file is part of the Ascend Language Interpreter. |
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* |
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* Copyright (C) 1990, 1993, 1994 Thomas Guthrie Epperly |
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* Copyright (C) 2006 Carnegie Mellon University |
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* |
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* The Ascend Language Interpreter is free software; you can redistribute |
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* it and/or modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of the |
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* License, or (at your option) any later version. |
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* |
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* The Ascend Language Interpreter is distributed in hope that it will be |
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with the program; if not, write to the Free Software Foundation, |
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* Inc., 675 Mass Ave, Cambridge, MA 02139 USA. Check the file named |
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* COPYING. |
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*/ |
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|
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/** @file |
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* Expression Module |
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* <pre> |
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* When #including exprs.h, make sure these files are #included first: |
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* #include "utilities/ascConfig.h" |
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* #include "fractions.h" |
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* #include "compiler.h" |
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* #include "dimen.h" |
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* #include "types.h" |
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* </pre> |
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*/ |
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|
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#ifndef ASC_EXPRS_H |
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#define ASC_EXPRS_H |
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|
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extern struct Expr *CreateVarExpr(struct Name *n); |
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/**< |
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* Create a name type expr node. |
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*/ |
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|
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extern void InitVarExpr(struct Expr *e, CONST struct Name *n); |
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/**< |
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* Given an empty expr node, initialize it to contain the name. |
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* Generally this is only used to init a temporary expr node |
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* that you want to be able to destroy later (or forget later) |
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* without destroying the contents -- in this case name. |
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* How you create and destroy e is your business. using stack space |
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* is suggested.<br><br> |
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* |
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* The problem with creating a varexpr with a name you want to keep |
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* after the node dies is that the name is destroyed when the node is. |
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*/ |
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|
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extern struct Expr *CreateOpExpr(enum Expr_enum t); |
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/**< |
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* Create an operator node. |
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*/ |
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|
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extern struct Expr *CreateSatisfiedExpr(struct Name *n, |
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double tol, |
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CONST dim_type *dims); |
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/**< |
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* Create an satisfied operator node. |
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*/ |
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|
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extern struct Expr *CreateFuncExpr(CONST struct Func *f); |
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/**< |
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* Create a function node. |
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*/ |
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|
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extern struct Expr *CreateIntExpr(long i); |
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/**< |
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* Create an integer node. |
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*/ |
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|
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extern struct Expr *CreateRealExpr(double r, CONST dim_type *dims); |
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/**< |
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* Create a real node with value r and dimensions "dims". |
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*/ |
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|
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extern struct Expr *CreateTrueExpr(void); |
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/**< |
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* Create a boolean node with value TRUE. |
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*/ |
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|
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extern struct Expr *CreateFalseExpr(void); |
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/**< |
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* Create a boolean node with value FALSE. |
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*/ |
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|
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extern struct Expr *CreateAnyExpr(void); |
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/**< |
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* Create a boolean node with undefined value. b_value will be 2. |
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*/ |
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|
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extern struct Expr *CreateSetExpr(struct Set *set); |
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/**< |
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* Create a set node. |
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*/ |
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|
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extern struct Expr *CreateSymbolExpr(symchar *sym); |
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/**< |
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* Create a symbol node. |
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*/ |
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|
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extern struct Expr *CreateQStringExpr(CONST char *qstring); |
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/**< |
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* Create a string node. The difference is that string may contain |
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* anything and are quoted as "qstring is string", whereas symbols |
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* are of the form 'symbol' and may have content restrictions. |
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*/ |
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|
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extern struct Expr *CreateBuiltin(enum Expr_enum t, struct Set *set); |
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/**< |
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* Create a node for SUM, PROD, UNION, etc.... |
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*/ |
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|
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extern void LinkExprs(struct Expr *cur, struct Expr *next); |
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/**< |
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* Link cur to next. |
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*/ |
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|
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extern unsigned long ExprListLength(CONST struct Expr *e); |
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/**< |
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* Traverse list to the end to find the length. |
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* Sometimes one would like to know the length a priori. |
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*/ |
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|
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#ifdef NDEBUG |
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#define NextExpr(e) ((e)->next) |
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#else |
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#define NextExpr(e) NextExprF(e) |
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#endif |
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/**< |
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* Return the expr node linked to e. |
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* @param e <code>CONST struct Expr*</code>, the expr to query. |
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* @return Returns the linked node as type <code>struct Expr*</code>. |
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* @see NextExprF() |
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*/ |
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extern struct Expr *NextExprF(CONST struct Expr *e); |
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/**< |
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* Return the expr node linked to e. |
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* Implementation function for NextExpr(). Do not use this function |
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* directly - use NextExpr() instead. |
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*/ |
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|
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#ifdef NDEBUG |
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#define ExprType(e) ((e)->t) |
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#else |
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#define ExprType(e) ExprTypeF(e) |
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#endif |
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/**< |
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* Return the type of e. |
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* @param e <code>CONST struct Expr*</code>, the expr to query. |
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* @return Returns the type as a <code>enum Expr_enum</code>. |
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* @see ExprTypeF() |
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*/ |
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extern enum Expr_enum ExprTypeF(CONST struct Expr *e); |
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/**< |
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* Return the type of e. |
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* Implementation function for ExprType(). Do not use this function |
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* directly - use ExprType() instead. |
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*/ |
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|
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#ifdef NDEBUG |
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#define ExprName(e) ((e)->v.nptr) |
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#else |
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#define ExprName(e) ExprNameF(e) |
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#endif |
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/**< |
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* Return the name field of a var type expr node. |
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* @param e <code>CONST struct Expr*</code>, the expr to query. |
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* @return Returns the name as a <code>CONST struct Name*</code>. |
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* @see ExprNameF() |
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*/ |
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extern CONST struct Name *ExprNameF(CONST struct Expr *e); |
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/**< |
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* Return the name field of a var type expr node. |
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* Implementation function for ExprName(). Do not use this function |
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* directly - use ExprName() instead. |
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*/ |
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|
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#ifdef NDEBUG |
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#define ExprFunc(e) ((e)->v.fptr) |
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#else |
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#define ExprFunc(e) ExprFuncF(e) |
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#endif |
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/**< |
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* Return the func field of a function type expr node. |
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* @param e <code>CONST struct Expr*</code>, the expr to query. |
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* @return Returns the func as a <code>CONST struct Func*</code>. |
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* @see ExprFuncF() |
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*/ |
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extern CONST struct Func *ExprFuncF(CONST struct Expr *e); |
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/**< |
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* Return the func field of a function type expr node. |
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* Implementation function for ExprFunc(). Do not use this function |
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* directly - use ExprFunc() instead. |
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*/ |
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|
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#ifdef NDEBUG |
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#define ExprIValue(e) ((e)->v.ivalue) |
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#else |
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#define ExprIValue(e) ExprIValueF(e) |
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#endif |
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/**< |
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* Return the integer value of a integer type expr node. |
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* @param e <code>CONST struct Expr*</code>, the expr to query. |
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* @return Returns the value as a <code>long</code>. |
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* @see ExprIValueF() |
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*/ |
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extern long ExprIValueF(CONST struct Expr *e); |
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/**< |
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* Return the integer value of a integer type expr node. |
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* Implementation function for ExprIValue(). Do not use this function |
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* directly - use ExprIValue() instead. |
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*/ |
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|
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#ifdef NDEBUG |
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#define ExprRValue(e) ((e)->v.r.rvalue) |
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#else |
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#define ExprRValue(e) ExprRValueF(e) |
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#endif |
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/**< |
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* Return the real value of a real type expr node. |
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* @param e <code>CONST struct Expr*</code>, the expr to query. |
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* @return Returns the value as a <code>double</code>. |
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* @see ExprRValueF() |
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*/ |
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extern double ExprRValueF(CONST struct Expr *e); |
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/**< |
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* Return the real value of a real type expr node. |
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* Implementation function for ExprRValue(). Do not use this function |
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* directly - use ExprRValue() instead. |
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*/ |
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|
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#ifdef NDEBUG |
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#define ExprRDimensions(e) ((e)->v.r.dimensions) |
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#else |
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#define ExprRDimensions(e) ExprRDimensionsF(e) |
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#endif |
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/**< |
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* Return the dimensions of a real type expr node. |
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* @param e <code>CONST struct Expr*</code>, the expr to query. |
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* @return Returns the value as a <code>CONST dim_type*</code>. |
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* @see ExprRDimensionsF() |
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*/ |
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extern CONST dim_type *ExprRDimensionsF(CONST struct Expr *e); |
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/**< |
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* Return the dimensions of a real type expr node. |
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* Implementation function for ExprRDimensions(). Do not use this function |
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* directly - use ExprRDimensions() instead. |
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*/ |
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|
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#ifdef NDEBUG |
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#define SatisfiedExprName(e) ((e)->v.se.sen) |
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#else |
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#define SatisfiedExprName(e) SatisfiedExprNameF(e) |
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#endif |
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/**< |
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* Return the name field of a var type satisfied expr node. |
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* @param e <code>CONST struct Expr*</code>, the expr to query. |
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* @return Returns the name as a <code>CONST struct Name*</code>. |
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* @see SatisfiedExprNameF() |
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*/ |
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extern CONST struct Name *SatisfiedExprNameF(CONST struct Expr *e); |
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/**< |
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* Return the name field of a var type satisfied expr node. |
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* Implementation function for SatisfiedExprName(). Do not use this function |
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* directly - use SatisfiedExprName() instead. |
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*/ |
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|
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#ifdef NDEBUG |
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#define SatisfiedExprRValue(e) ((e)->v.se.ser.rvalue) |
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#else |
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#define SatisfiedExprRValue(e) SatisfiedExprRValueF(e) |
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#endif |
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/**< |
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* Return the real value of a real type satisfied expr node. |
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* @param e <code>CONST struct Expr*</code>, the expr to query. |
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* @return Returns the value as a <code>double</code>. |
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* @see SatisfiedExprRValueF() |
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*/ |
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extern double SatisfiedExprRValueF(CONST struct Expr *e); |
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/**< |
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* Return the real value of a real type satisfied expr node. |
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* Implementation function for SatisfiedExprRValue(). Do not use this function |
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* directly - use SatisfiedExprRValue() instead. |
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*/ |
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|
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#ifdef NDEBUG |
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#define SatisfiedExprRDimensions(e) ((e)->v.se.ser.dimensions) |
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#else |
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#define SatisfiedExprRDimensions(e) SatisfiedExprRDimensionsF(e) |
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#endif |
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/**< |
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* Return the dimensions of a real type satisfied expr node. |
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* @param e <code>CONST struct Expr*</code>, the expr to query. |
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* @return Returns the dimension as a <code>CONST dim_type*</code>. |
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* @see SatisfiedExprRDimensionsF() |
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*/ |
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extern CONST dim_type *SatisfiedExprRDimensionsF(CONST struct Expr *e); |
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/**< |
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* Return the dimensions of a real type satisfied expr node. |
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* Implementation function for SatisfiedExprRDimensions(). Do not use this function |
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* directly - use SatisfiedExprRDimensions() instead. |
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*/ |
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|
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#ifdef NDEBUG |
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#define ExprBValue(e) ((e)->v.bvalue) |
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#else |
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#define ExprBValue(e) ExprBValueF(e) |
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#endif |
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/**< |
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* Return the boolean value of a boolean type satisfied expr node. |
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* Returns 1 if e is TRUE, 0 if e is FALSE, 2 if e is ANY. |
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* @param e <code>CONST struct Expr*</code>, the expr to query. |
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* @return Returns the value as an <code>int</code>. |
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* @see ExprBValueF() |
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*/ |
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extern int ExprBValueF(CONST struct Expr *e); |
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/**< |
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* Return 1 if e is TRUE, 0 if e is FALSE, 2 if e is ANY. |
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* Implementation function for ExprBValue(). Do not use this function |
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* directly - use ExprBValue() instead. |
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*/ |
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|
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#ifdef NDEBUG |
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#define ExprSValue(e) ((e)->v.s) |
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#else |
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#define ExprSValue(e) ExprSValueF(e) |
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#endif |
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/**< |
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* Return the set value of a set node type. |
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* @param e <code>CONST struct Expr*</code>, the expr to query. |
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* @return Returns the value as an <code>struct Set*</code>. |
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* @see ExprSValueF() |
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*/ |
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extern struct Set *ExprSValueF(CONST struct Expr *e); |
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/**< |
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* Return the set value of a set node type. |
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* Implementation function for ExprSValue(). Do not use this function |
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* directly - use ExprSValue() instead. |
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*/ |
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|
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#ifdef NDEBUG |
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#define ExprSymValue(e) ((e)->v.sym_ptr) |
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#else |
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#define ExprSymValue(e) ExprSymValueF(e) |
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#endif |
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/**< |
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* Return the symbol pointer value from a symbol node type. |
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* @param e <code>CONST struct Expr*</code>, the expr to query. |
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* @return Returns the value as an <code>symchar*</code>. |
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* @see ExprSymValueF() |
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*/ |
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extern symchar *ExprSymValueF(CONST struct Expr *e); |
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/**< |
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* Return the symbol pointer value from a symbol node type. |
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* Implementation function for ExprSymValue(). Do not use this function |
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* directly - use ExprSymValue() instead. |
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*/ |
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|
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#ifdef NDEBUG |
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#define ExprQStrValue(e) ((e)->v.sym_ptr) |
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#else |
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#define ExprQStrValue(e) ExprQStrValueF(e) |
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#endif |
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/**< |
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* Return the string pointer value from a string node type. |
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* The difference between a string and a symbol, is that the former |
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* may contain whitespace. The type is called e_qstring |
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* @param e <code>CONST struct Expr*</code>, the expr to query. |
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* @return Returns the value as an <code>CONST char*</code>. |
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* @see ExprQStrValueF() |
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*/ |
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extern CONST char *ExprQStrValueF(CONST struct Expr *e); |
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/**< |
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* Return the string pointer value from a string node type. |
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* The difference between a string and a symbol, is that the former |
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* may contain whitespace. The type is called e_qstring |
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* Implementation function for ExprQStrValue(). Do not use this function |
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* directly - use ExprQStrValue() instead. |
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*/ |
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|
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#ifdef NDEBUG |
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#define ExprBuiltinSet(e) ((e)->v.s) |
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#else |
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#define ExprBuiltinSet(e) ExprBuiltinSetF(e) |
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#endif |
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/**< |
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* Return the set argument for one of the builtin operations. |
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* SUM, PROD, CARD, etc.. |
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* @param e <code>CONST struct Expr*</code>, the expr to query. |
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* @return Returns the set as an <code>CONST struct Set*</code>. |
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* @see ExprBuiltinSetF() |
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*/ |
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extern CONST struct Set *ExprBuiltinSetF(CONST struct Expr *e); |
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/**< |
| 409 |
* Return the set argument for one of the builtin operations. |
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* SUM, PROD, CARD, etc. |
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* Implementation function for ExprBuiltinSet(). Do not use this function |
| 412 |
* directly - use ExprBuiltinSet() instead. |
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*/ |
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|
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extern struct Expr *CopyExprList(CONST struct Expr *e); |
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/**< |
| 417 |
* Make and return a copy of e. |
| 418 |
*/ |
| 419 |
|
| 420 |
extern void DestroyExprList(struct Expr *e); |
| 421 |
/**< |
| 422 |
* Deallocate all the memory associated with e. |
| 423 |
* Handles NULL input gracefully. |
| 424 |
*/ |
| 425 |
|
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extern struct Expr *JoinExprLists(struct Expr *e1, struct Expr *e2); |
| 427 |
/**< |
| 428 |
* Append list e2 to the end of e1. This returns e1, unless e1 |
| 429 |
* is NULL in which case it returns e2. |
| 430 |
*/ |
| 431 |
|
| 432 |
extern int ExprsEqual(CONST struct Expr *e1, CONST struct Expr *e2); |
| 433 |
/**< |
| 434 |
* Return TRUE if and only if e1 and e2 are structurally equivalent. |
| 435 |
*/ |
| 436 |
|
| 437 |
extern int CompareExprs(CONST struct Expr *e1, CONST struct Expr *e2); |
| 438 |
/**< |
| 439 |
* Compares2 expressions. |
| 440 |
* Return -1, 0, 1 as e1 is < == > e2. |
| 441 |
* Expressions being complicated things, this is not easily |
| 442 |
* explained. The expressions are being compared in the |
| 443 |
* absence of an instance context, so we're looking for |
| 444 |
* structural differences. |
| 445 |
* The NULL Expr > all Expr. |
| 446 |
*/ |
| 447 |
|
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extern void exprs_init_pool(void); |
| 449 |
/**< |
| 450 |
* Starts memory recycle. do not call twice before stopping recycle. |
| 451 |
*/ |
| 452 |
|
| 453 |
extern void exprs_destroy_pool(void); |
| 454 |
/**< |
| 455 |
* Stops memory recycle. do not call while ANY Expr are outstanding. |
| 456 |
*/ |
| 457 |
|
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extern void exprs_report_pool(void); |
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/**< |
| 460 |
* Write the pool report to ASCERR for the exprs pool. |
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*/ |
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|
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#endif /* ASC_EXPRS_H */ |
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