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src/globals.h

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+/****************************************************/
+/* File: globals.h                                  */
+/* Global types and vars for TINY compiler          */
+/* must come before other include files             */
+/* Compiler Construction: Principles and Practice   */
+/* Kenneth C. Louden                                */
+/****************************************************/
+
+#ifndef _GLOBALS_H_
+#define _GLOBALS_H_
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+#ifndef TRUE
+#define TRUE 1
+#endif
+
+/* MAXRESERVED = the number of reserved words */
+#define MAXRESERVED 8
+
+typedef enum 
+    /* book-keeping tokens */
+   {ENDFILE,ERROR,
+    /* reserved words */
+    IF,THEN,ELSE,END,REPEAT,UNTIL,READ,WRITE,
+    /* multicharacter tokens */
+    ID,NUM,
+    /* special symbols */
+    ASSIGN,EQ,LT,PLUS,MINUS,TIMES,OVER,LPAREN,RPAREN,SEMI
+   } TokenType;
+
+extern FILE* source; /* source code text file */
+extern FILE* listing; /* listing output text file */
+extern FILE* code; /* code text file for TM simulator */
+
+extern int lineno; /* source line number for listing */
+
+/**************************************************/
+/***********   Syntax tree for parsing ************/
+/**************************************************/
+
+typedef enum {StmtK,ExpK} NodeKind;
+typedef enum {IfK,RepeatK,AssignK,ReadK,WriteK} StmtKind;
+typedef enum {OpK,ConstK,IdK} ExpKind;
+
+/* ExpType is used for type checking */
+typedef enum {Void,Integer,Boolean} ExpType;
+
+#define MAXCHILDREN 3
+
+typedef struct treeNode
+   { struct treeNode * child[MAXCHILDREN];
+     struct treeNode * sibling;
+     int lineno;
+     NodeKind nodekind;
+     union { StmtKind stmt; ExpKind exp;} kind;
+     union { TokenType op;
+             int val;
+             char * name; } attr;
+     ExpType type; /* for type checking of exps */
+   } TreeNode;
+
+/**************************************************/
+/***********   Flags for tracing       ************/
+/**************************************************/
+
+/* EchoSource = TRUE causes the source program to
+ * be echoed to the listing file with line numbers
+ * during parsing
+ */
+extern int EchoSource;
+
+/* TraceScan = TRUE causes token information to be
+ * printed to the listing file as each token is
+ * recognized by the scanner
+ */
+extern int TraceScan;
+
+/* TraceParse = TRUE causes the syntax tree to be
+ * printed to the listing file in linearized form
+ * (using indents for children)
+ */
+extern int TraceParse;
+
+/* TraceAnalyze = TRUE causes symbol table inserts
+ * and lookups to be reported to the listing file
+ */
+extern int TraceAnalyze;
+
+/* TraceCode = TRUE causes comments to be written
+ * to the TM code file as code is generated
+ */
+extern int TraceCode;
+
+/* Error = TRUE prevents further passes if an error occurs */
+extern int Error; 
+#endif