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/****************************************************************************
* fnsyntax.h
*
* This module contains all defines, typedefs, and prototypes for fnsyntax.cpp.
*
* This module is inspired by code by D. Skarda, T. Bily and R. Suzuki.
*
* from Persistence of Vision(tm) Ray Tracer version 3.6.
* Copyright 1991-2003 Persistence of Vision Team
* Copyright 2003-2004 Persistence of Vision Raytracer Pty. Ltd.
*---------------------------------------------------------------------------
* NOTICE: This source code file is provided so that users may experiment
* with enhancements to POV-Ray and to port the software to platforms other
* than those supported by the POV-Ray developers. There are strict rules
* regarding how you are permitted to use this file. These rules are contained
* in the distribution and derivative versions licenses which should have been
* provided with this file.
*
* These licences may be found online, linked from the end-user license
* agreement that is located at http://www.povray.org/povlegal.html
*---------------------------------------------------------------------------
* This program is based on the popular DKB raytracer version 2.12.
* DKBTrace was originally written by David K. Buck.
* DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins.
*---------------------------------------------------------------------------
* $File: //depot/povray/3.6-release/source/fnsyntax.h $
* $Revision: #2 $
* $Change: 2939 $
* $DateTime: 2004/07/04 13:43:26 $
* $Author: root $
* $Log$
*****************************************************************************/
#ifndef FNSYNTAX_H
#define FNSYNTAX_H
BEGIN_POV_NAMESPACE
// Caution: The compiler depends on the order of these constants!
enum
{
OP_NONE = 0, // 0
OP_CMP_EQ, // 1
OP_CMP_NE, // 2
OP_CMP_LT, // 3
OP_CMP_LE, // 4
OP_CMP_GT, // 5
OP_CMP_GE, // 6
OP_ADD, // 7
OP_SUB, // 8
OP_OR, // 9
OP_MUL, // 10
OP_DIV, // 11
OP_AND, // 12
OP_POW, // 13
OP_NEG, // 14
OP_NOT, // 15
OP_LEFTMOST, // 16
OP_FIRST, // 17
OP_CONSTANT, // 18
OP_VARIABLE, // 19
OP_DOT, // 20
OP_MEMBER, // 21
OP_CALL, // 22
OP_TRAP // 23
};
typedef struct ExprNodeStruct
{
struct ExprNodeStruct *parent;
struct ExprNodeStruct *child;
struct ExprNodeStruct *prev;
struct ExprNodeStruct *next;
int stage;
int op;
union
{
char *variable;
struct
{
char *name;
TOKEN token;
FUNCTION fn;
} call;
unsigned int trap;
DBL number;
};
} ExprNode;
ExprNode *FNSyntax_ParseExpression();
ExprNode *FNSyntax_GetTrapExpression(unsigned int);
void FNSyntax_DeleteExpression(ExprNode *);
END_POV_NAMESPACE
#endif
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