git.sur5r.net Git - cc65/blob - src/common/exprdefs.h

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                                exprdefs.h                                 */
   4 /*                                                                           */
   5 /*                        Expression tree definitions                        */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 1998     Ullrich von Bassewitz                                        */
  10 /*              Wacholderweg 14                                              */
  11 /*              D-70597 Stuttgart                                            */
  12 /* EMail:       uz@musoftware.de                                             */
  13 /*                                                                           */
  14 /*                                                                           */
  15 /* This software is provided 'as-is', without any expressed or implied       */
  16 /* warranty.  In no event will the authors be held liable for any damages    */
  17 /* arising from the use of this software.                                    */
  18 /*                                                                           */
  19 /* Permission is granted to anyone to use this software for any purpose,     */
  20 /* including commercial applications, and to alter it and redistribute it    */
  21 /* freely, subject to the following restrictions:                            */
  22 /*                                                                           */
  23 /* 1. The origin of this software must not be misrepresented; you must not   */
  24 /*    claim that you wrote the original software. If you use this software   */
  25 /*    in a product, an acknowledgment in the product documentation would be  */
  26 /*    appreciated but is not required.                                       */
  27 /* 2. Altered source versions must be plainly marked as such, and must not   */
  28 /*    be misrepresented as being the original software.                      */
  29 /* 3. This notice may not be removed or altered from any source              */
  30 /*    distribution.                                                          */
  31 /*                                                                           */
  32 /*****************************************************************************/
  33
  34
  35
  36 #ifndef EXPRDEFS_H
  37 #define EXPRDEFS_H
  38
  39
  40
  41 /*****************************************************************************/
  42 /*                                   Data                                    */
  43 /*****************************************************************************/
  44
  45
  46
  47 /* Expression type masks */
  48 #define EXPR_TYPEMASK           0xC0
  49 #define EXPR_BINARYNODE         0x00
  50 #define EXPR_UNARYNODE          0x40
  51 #define EXPR_LEAFNODE           0x80
  52
  53 /* Type of expression nodes */
  54 #define EXPR_NULL               0x00    /* Internal error or NULL node */
  55
  56 /* Leaf node codes */
  57 #define EXPR_LITERAL            (EXPR_LEAFNODE | 0x01)
  58 #define EXPR_SYMBOL             (EXPR_LEAFNODE | 0x02)
  59 #define EXPR_SEGMENT            (EXPR_LEAFNODE | 0x03)
  60 #define EXPR_MEMAREA            (EXPR_LEAFNODE | 0x04)  /* Linker only */
  61 #define EXPR_ULABEL             (EXPR_LEAFNODE | 0x05)  /* Assembler only */
  62
  63 /* Binary operations, left and right hand sides are valid */
  64 #define EXPR_PLUS               (EXPR_BINARYNODE | 0x01)
  65 #define EXPR_MINUS              (EXPR_BINARYNODE | 0x02)
  66 #define EXPR_MUL                (EXPR_BINARYNODE | 0x03)
  67 #define EXPR_DIV                (EXPR_BINARYNODE | 0x04)
  68 #define EXPR_MOD                (EXPR_BINARYNODE | 0x05)
  69 #define EXPR_OR                 (EXPR_BINARYNODE | 0x06)
  70 #define EXPR_XOR                (EXPR_BINARYNODE | 0x07)
  71 #define EXPR_AND                (EXPR_BINARYNODE | 0x08)
  72 #define EXPR_SHL                (EXPR_BINARYNODE | 0x09)
  73 #define EXPR_SHR                (EXPR_BINARYNODE | 0x0A)
  74 #define EXPR_EQ                 (EXPR_BINARYNODE | 0x0B)
  75 #define EXPR_NE                 (EXPR_BINARYNODE | 0x0C)
  76 #define EXPR_LT                 (EXPR_BINARYNODE | 0x0D)
  77 #define EXPR_GT                 (EXPR_BINARYNODE | 0x0E)
  78 #define EXPR_LE                 (EXPR_BINARYNODE | 0x0F)
  79 #define EXPR_GE                 (EXPR_BINARYNODE | 0x10)
  80 #define EXPR_BAND               (EXPR_BINARYNODE | 0x11)
  81 #define EXPR_BOR                (EXPR_BINARYNODE | 0x12)
  82 #define EXPR_BXOR               (EXPR_BINARYNODE | 0x13)
  83
  84 /* Unary operations, right hand side is empty */
  85 #define EXPR_UNARY_MINUS        (EXPR_UNARYNODE | 0x01)
  86 #define EXPR_NOT                (EXPR_UNARYNODE | 0x02)
  87 #define EXPR_LOBYTE             (EXPR_UNARYNODE | 0x03)
  88 #define EXPR_HIBYTE             (EXPR_UNARYNODE | 0x04)
  89 #define EXPR_SWAP               (EXPR_UNARYNODE | 0x05)
  90 #define EXPR_BNOT               (EXPR_UNARYNODE | 0x06)
  91
  92
  93
  94 /* The expression node itself */
  95 typedef struct ExprNode_ ExprNode;
  96 struct ExprNode_ {
  97     unsigned char           Op;         /* Operand/Type */
  98     ExprNode*               Left;       /* Left leaf */
  99     ExprNode*               Right;      /* Right leaf */
 100     struct ObjData_*        Obj;        /* Object file reference (linker) */
 101     union {
 102         long                Val;        /* If this is a value */
 103         struct SymEntry_*   Sym;        /* If this is a symbol */
 104         unsigned            SegNum;     /* If this is a segment */
 105         unsigned            ImpNum;     /* If this is an import */
 106         struct Memory_*     MemArea;    /* If this is a memory area */
 107     } V;
 108 };
 109
 110
 111
 112 /* Macros to determine the expression type */
 113 #define EXPR_IS_LEAF(Op)        (((Op) & EXPR_TYPEMASK) == EXPR_LEAFNODE)
 114 #define EXPR_IS_UNARY(Op)       (((Op) & EXPR_TYPEMASK) == EXPR_UNARYNODE)
 115 #define EXPR_IS_BINARY(OP)      (((Op) & EXPR_TYPEMASK) == EXPR_BINARYNODE)
 116
 117
 118
 119 /* End of exprdefs.h */
 120
 121 #endif
 122
 123
 124