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74 lines
2.6 KiB
74 lines
2.6 KiB
/* $IdPath$ |
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* Expression handling header file |
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* |
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* Copyright (C) 2001 Michael Urman, Peter Johnson |
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* |
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* This file is part of YASM. |
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* |
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* YASM is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* YASM is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU 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 this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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#ifndef YASM_EXPR_H |
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#define YASM_EXPR_H |
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typedef struct ExprItem ExprItem; |
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/*@only@*/ expr *expr_new(ExprOp, /*@only@*/ ExprItem *, |
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/*@only@*/ /*@null@*/ ExprItem *); |
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/*@only@*/ ExprItem *ExprSym(/*@keep@*/ symrec *); |
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/*@only@*/ ExprItem *ExprExpr(/*@keep@*/ expr *); |
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/*@only@*/ ExprItem *ExprInt(/*@keep@*/ intnum *); |
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/*@only@*/ ExprItem *ExprFloat(/*@keep@*/ floatnum *); |
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/*@only@*/ ExprItem *ExprReg(unsigned char reg, unsigned char size); |
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#define expr_new_tree(l,o,r) \ |
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expr_new ((o), ExprExpr(l), ExprExpr(r)) |
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#define expr_new_branch(o,r) \ |
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expr_new ((o), ExprExpr(r), (ExprItem *)NULL) |
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#define expr_new_ident(r) \ |
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expr_new (EXPR_IDENT, (r), (ExprItem *)NULL) |
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/* allocates and makes an exact duplicate of e */ |
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/*@null@*/ expr *expr_copy(const expr *e); |
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void expr_delete(/*@only@*/ /*@null@*/ expr *e); |
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/* Expands all (symrec) equ's in the expression into full expression |
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* instances. |
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*/ |
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void expr_expand_equ(expr *e); |
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/* Simplifies the expression e as much as possible, eliminating extraneous |
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* branches and simplifying integer-only subexpressions. |
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*/ |
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/*@only@*/ /*@null@*/ expr *expr_simplify(/*@returned@*/ /*@only@*/ /*@null@*/ |
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expr *e); |
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/* Gets the integer value of e if the expression is just an integer. If the |
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* expression is more complex (contains anything other than integers, ie |
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* floats, non-valued labels, registers), returns NULL. |
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*/ |
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/*@dependent@*/ /*@null@*/ const intnum *expr_get_intnum(expr **ep); |
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/* Gets the symrec value of e if the expression is just an integer. If the |
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* expression is more complex, returns NULL. Simplifies the expr first if |
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* simplify is nonzero. |
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*/ |
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/*@dependent@*/ /*@null@*/ const symrec *expr_get_symrec(expr **ep, |
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int simplify); |
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void expr_print(FILE *f, /*@null@*/ expr *); |
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#endif
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