amxmodx/compiler/scasm/cexpr.h

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/* AMX Assembler
* Copyright (C)2004 David "BAILOPAN" Anderson
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*
* Version: $Id$
*/
#ifndef _INCLUDE_CEXPR_H
#define _INCLUDE_CEXPR_H
/* This class is used for a single expression element
* It reads in a symbol and evaluates it.
*/
typedef enum
{
Token_None,
Token_Or,
Token_Xor,
Token_And,
Token_Shr,
Token_Shl,
Token_Mod,
Token_Div,
Token_Mul,
Token_Sub,
Token_Add,
Token_Not,
/* End */
Tokens_Total,
} OpToken;
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typedef enum
{
Val_None,
Val_Error,
Val_String,
Val_String_Hex,
Val_String_Number,
Val_Number_Hex,
Val_Number,
Val_Block,
Val_Hex,
Val_Float,
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} cExprType;
class CExpr
{
public:
CExpr();
CExpr(ErrorMngr *e);
CExpr(ErrorMngr *e, std::string &text);
void Set(std::string &text);
const char *GetString(int *d=NULL);
int Analyze();
cExprType Evaluate(int symNum = 0);
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cExprType GetType();
int GetNumber();
float GetFloat() { return fData; }
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int Size();
void Clear();
void Not();
void Oper(OpToken op, CExpr &e);
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~CExpr();
private:
void Update();
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char IsHex(char c);
char IsLiteral(char c);
int DeHex(std::string blk);
private:
char *block;
std::string data;
cExprType type;
float fData;
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int numVal;
bool bDone;
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private:
ErrorMngr *CError;
};
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#endif //_INCLUDE_CEXPR_H