105 lines
2.8 KiB
C
105 lines
2.8 KiB
C
/****************************************************/
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/* File: globals.h */
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/* Global types and vars for TINY compiler */
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/* must come before other include files */
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/* Compiler Construction: Principles and Practice */
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/* Kenneth C. Louden */
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/****************************************************/
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#ifndef _GLOBALS_H_
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#define _GLOBALS_H_
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <string.h>
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#ifndef FALSE
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#define FALSE 0
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#endif
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#ifndef TRUE
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#define TRUE 1
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#endif
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/* MAXRESERVED = the number of reserved words */
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#define MAXRESERVED 6
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typedef enum
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/* book-keeping tokens */
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{ENDFILE,ERROR,
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/* reserved words */
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IF,ELSE,WHILE,RETURN,INT,VOID,
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/* multicharacter tokens */
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ID,NUM,
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/* special symbols */
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ASSIGN,EQ,NE,LT,LE,GT,GE,PLUS,MINUS,TIMES,OVER,LPAREN,RPAREN,LBRACE,RBRACE,LCURLY,RCURLY,SEMI,COMMA
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} TokenType;
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extern FILE* source; /* source code text file */
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extern FILE* listing; /* listing output text file */
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extern FILE* code; /* code text file for TM simulator */
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extern int lineno; /* source line number for listing */
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/**************************************************/
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/*********** Syntax tree for parsing ************/
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/**************************************************/
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typedef enum {StmtK,ExpK} NodeKind;
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typedef enum {IfK,RepeatK,AssignK,ReadK,WriteK} StmtKind;
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typedef enum {OpK,ConstK,IdK} ExpKind;
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/* ExpType is used for type checking */
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typedef enum {Void,Integer,Boolean} ExpType;
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#define MAXCHILDREN 3
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typedef struct treeNode
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{ struct treeNode * child[MAXCHILDREN];
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struct treeNode * sibling;
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int lineno;
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NodeKind nodekind;
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union { StmtKind stmt; ExpKind exp;} kind;
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union { TokenType op;
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int val;
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char * name; } attr;
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ExpType type; /* for type checking of exps */
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} TreeNode;
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/**************************************************/
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/*********** Flags for tracing ************/
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/**************************************************/
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/* EchoSource = TRUE causes the source program to
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* be echoed to the listing file with line numbers
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* during parsing
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*/
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extern int EchoSource;
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/* TraceScan = TRUE causes token information to be
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* printed to the listing file as each token is
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* recognized by the scanner
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*/
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extern int TraceScan;
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/* TraceParse = TRUE causes the syntax tree to be
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* printed to the listing file in linearized form
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* (using indents for children)
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*/
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extern int TraceParse;
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/* TraceAnalyze = TRUE causes symbol table inserts
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* and lookups to be reported to the listing file
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*/
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extern int TraceAnalyze;
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/* TraceCode = TRUE causes comments to be written
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* to the TM code file as code is generated
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*/
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extern int TraceCode;
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/* Error = TRUE prevents further passes if an error occurs */
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extern int Error;
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#endif
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