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147 lines
6.6 KiB
C
147 lines
6.6 KiB
C
/*****************************************************************************/
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/* */
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/* exprdefs.h */
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/* */
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/* Expression tree definitions */
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/* */
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/* */
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/* */
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/* (C) 1998-2010, Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#ifndef EXPRDEFS_H
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#define EXPRDEFS_H
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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/* Expression type masks */
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#define EXPR_TYPEMASK 0xC0
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#define EXPR_BINARYNODE 0x00
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#define EXPR_UNARYNODE 0x40
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#define EXPR_LEAFNODE 0x80
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/* Type of expression nodes */
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#define EXPR_NULL 0x00 /* Internal error or NULL node */
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/* Leaf node codes */
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#define EXPR_LITERAL (EXPR_LEAFNODE | 0x01)
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#define EXPR_SYMBOL (EXPR_LEAFNODE | 0x02)
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#define EXPR_SECTION (EXPR_LEAFNODE | 0x03)
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#define EXPR_SEGMENT (EXPR_LEAFNODE | 0x04) /* Linker only */
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#define EXPR_MEMAREA (EXPR_LEAFNODE | 0x05) /* Linker only */
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#define EXPR_ULABEL (EXPR_LEAFNODE | 0x06) /* Assembler only */
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/* Binary operations, left and right hand sides are valid */
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#define EXPR_PLUS (EXPR_BINARYNODE | 0x01)
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#define EXPR_MINUS (EXPR_BINARYNODE | 0x02)
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#define EXPR_MUL (EXPR_BINARYNODE | 0x03)
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#define EXPR_DIV (EXPR_BINARYNODE | 0x04)
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#define EXPR_MOD (EXPR_BINARYNODE | 0x05)
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#define EXPR_OR (EXPR_BINARYNODE | 0x06)
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#define EXPR_XOR (EXPR_BINARYNODE | 0x07)
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#define EXPR_AND (EXPR_BINARYNODE | 0x08)
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#define EXPR_SHL (EXPR_BINARYNODE | 0x09)
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#define EXPR_SHR (EXPR_BINARYNODE | 0x0A)
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#define EXPR_EQ (EXPR_BINARYNODE | 0x0B)
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#define EXPR_NE (EXPR_BINARYNODE | 0x0C)
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#define EXPR_LT (EXPR_BINARYNODE | 0x0D)
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#define EXPR_GT (EXPR_BINARYNODE | 0x0E)
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#define EXPR_LE (EXPR_BINARYNODE | 0x0F)
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#define EXPR_GE (EXPR_BINARYNODE | 0x10)
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#define EXPR_BOOLAND (EXPR_BINARYNODE | 0x11)
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#define EXPR_BOOLOR (EXPR_BINARYNODE | 0x12)
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#define EXPR_BOOLXOR (EXPR_BINARYNODE | 0x13)
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#define EXPR_MAX (EXPR_BINARYNODE | 0x14)
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#define EXPR_MIN (EXPR_BINARYNODE | 0x15)
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/* Unary operations, right hand side is empty */
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#define EXPR_UNARY_MINUS (EXPR_UNARYNODE | 0x01)
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#define EXPR_NOT (EXPR_UNARYNODE | 0x02)
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#define EXPR_SWAP (EXPR_UNARYNODE | 0x03)
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#define EXPR_BOOLNOT (EXPR_UNARYNODE | 0x04)
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#define EXPR_BYTE0 (EXPR_UNARYNODE | 0x08)
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#define EXPR_BYTE1 (EXPR_UNARYNODE | 0x09)
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#define EXPR_BYTE2 (EXPR_UNARYNODE | 0x0A)
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#define EXPR_BYTE3 (EXPR_UNARYNODE | 0x0B)
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#define EXPR_WORD0 (EXPR_UNARYNODE | 0x0C)
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#define EXPR_WORD1 (EXPR_UNARYNODE | 0x0D)
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/* The expression node itself */
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typedef struct ExprNode ExprNode;
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struct ExprNode {
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unsigned char Op; /* Operand/Type */
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ExprNode* Left; /* Left leaf */
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ExprNode* Right; /* Right leaf */
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struct ObjData* Obj; /* Object file reference (linker) */
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union {
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long IVal; /* If this is a int value */
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struct SymEntry* Sym; /* If this is a symbol */
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unsigned SecNum; /* If this is a section and Obj != 0 */
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unsigned ImpNum; /* If this is an import and Obj != 0 */
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struct Import* Imp; /* If this is an import and Obj == 0 */
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struct MemoryArea* Mem; /* If this is a memory area */
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struct Segment* Seg; /* If this is a segment */
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struct Section* Sec; /* If this is a section and Obj == 0 */
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} V;
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};
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/* Macros to determine the expression type */
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#define EXPR_IS_LEAF(Op) (((Op) & EXPR_TYPEMASK) == EXPR_LEAFNODE)
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#define EXPR_IS_UNARY(Op) (((Op) & EXPR_TYPEMASK) == EXPR_UNARYNODE)
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#define EXPR_IS_BINARY(OP) (((Op) & EXPR_TYPEMASK) == EXPR_BINARYNODE)
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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void DumpExpr (const ExprNode* Expr, const ExprNode* (*ResolveSym) (const struct SymEntry*));
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/* Dump an expression tree to stdout */
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/* End of exprdefs.h */
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#endif
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