2a59d07ef2
Only 2 differences with original release: add return type to main int disassem.cpp popPosStack() add cast to intptr_t
138 lines
4.6 KiB
C
138 lines
4.6 KiB
C
/*
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* File: ast.h
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* Purpose: definition of the abstract syntax tree ADT.
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* Date: September 1993
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* (C) Cristina Cifuentes
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*/
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#define operandSize 20
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/* The following definitions and types define the Conditional Expression
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* attributed syntax tree, as defined by the following EBNF:
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CondExp ::= CondTerm AND CondTerm | CondTerm
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CondTerm ::= (CondFactor op CondFactor)
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CondFactor ::= Identifier | ! CondFactor
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Identifier ::= globalVar | register | localVar | parameter | constant
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op ::= <= | < | = | != | > | >=
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*/
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/* Conditional Expression enumeration nodes and operators */
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typedef enum {
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BOOLEAN_OP, /* condOps */
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NEGATION, /* not (2's complement) */
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ADDRESSOF, /* addressOf (&) */
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DEREFERENCE, /* contents of (*) */
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IDENTIFIER, /* {register | local | param | constant | global} */
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/* The following are only available to C programs */
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POST_INC, /* ++ (post increment) */
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POST_DEC, /* -- (post decrement) */
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PRE_INC, /* ++ (pre increment) */
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PRE_DEC, /* -- (pre decrement) */
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} condNodeType;
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typedef enum {
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GLOB_VAR, /* global variable */
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REGISTER, /* register */
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LOCAL_VAR, /* negative disp */
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PARAM, /* positive disp */
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GLOB_VAR_IDX, /* indexed global variable *//*** should merge w/glob-var*/
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CONSTANT, /* constant */
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STRING, /* string */
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LONG_VAR, /* long variable */
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FUNCTION, /* function */
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OTHER /* other **** tmp solution */
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} condId;
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typedef enum {
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/* For conditional expressions */
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LESS_EQUAL = 0, /* <= */
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LESS, /* < */
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EQUAL, /* == */
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NOT_EQUAL, /* != */
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GREATER, /* > */
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GREATER_EQUAL, /* >= */
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/* For general expressions */
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AND, /* & */
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OR, /* | */
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XOR, /* ^ */
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NOT, /* ~ */ /* 1's complement */
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ADD, /* + */
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SUB, /* - */
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MUL, /* * */
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DIV, /* / */
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SHR, /* >> */
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SHL, /* << */
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MOD, /* % */
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DBL_AND, /* && */
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DBL_OR, /* || */
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DUMMY, /* */
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} condOp;
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/* High-level BOOLEAN conditions for iJB..iJNS icodes */
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static condOp condOpJCond[12] = {LESS, LESS_EQUAL, GREATER_EQUAL, GREATER,
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EQUAL, NOT_EQUAL, LESS, GREATER_EQUAL,
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LESS_EQUAL, GREATER, GREATER_EQUAL, LESS};
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static condOp invCondOpJCond[12] = {GREATER_EQUAL, GREATER, LESS, LESS_EQUAL,
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NOT_EQUAL, EQUAL, GREATER_EQUAL, LESS,
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GREATER, LESS_EQUAL, LESS, GREATER_EQUAL};
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/* Register types */
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typedef enum {
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BYTE_REG, WORD_REG
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} regType;
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typedef struct
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{
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condId idType;
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regType regiType; /* for REGISTER only */
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union _idNode {
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Int regiIdx; /* index into localId, REGISTER */
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Int globIdx; /* index into symtab for GLOB_VAR */
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Int localIdx; /* idx into localId, LOCAL_VAR */
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Int paramIdx; /* idx into args symtab, PARAMS */
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Int idxGlbIdx; /* idx into localId, GLOB_VAR_IDX */
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struct _kte { /* for CONSTANT only */
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dword kte; /* value of the constant */
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byte size; /* #bytes size constant */
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} kte;
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dword strIdx; /* idx into image, for STRING */
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Int longIdx; /* idx into LOCAL_ID table, LONG_VAR*/
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struct _call { /* for FUNCTION only */
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struct _proc *proc;
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struct _STKFRAME *args;
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} call;
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struct { /* for OTHER; tmp struct */
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byte seg; /* segment */
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byte regi; /* index mode */
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int16 off; /* offset */
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} other;
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} idNode;
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} IDENTTYPE;
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/* Expression data type */
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typedef struct _condExpr {
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condNodeType type; /* Conditional Expression Node Type */
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union _exprNode { /* Different cond expr nodes */
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struct { /* for BOOLEAN_OP */
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condOp op;
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struct _condExpr *lhs;
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struct _condExpr *rhs;
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} boolExpr;
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struct _condExpr *unaryExp; /* for NEGATION,ADDRESSOF,DEREFERENCE*/
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IDENTTYPE ident; /* for IDENTIFIER */
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} expr;
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} COND_EXPR;
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/* Sequence of conditional expression data type */
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/*** NOTE: not used at present ****/
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typedef struct _condExpSeq {
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COND_EXPR *expr;
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struct _condExpSeq *next;
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} SEQ_COND_EXPR;
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