scan.h

Go to the documentation of this file.

 
#ifndef SCAN_H
#define SCAN_H
 
#include <stdbool.h>
 
#include "types/identifier.h"
#include "types/number.h"
 
typedef enum
{
 T_EOF,
 // Arithmetic Operators
 T_PLUS,
 T_MINUS,
 T_STAR,
 T_SLASH,
 T_EXPONENT,
 // Comparison Operators
 T_EQ,
 T_NEQ,
 T_LT,
 T_GT,
 T_LE,
 T_GE,
 // Logical Operators
 T_AND,
 T_OR,
 T_XOR,
 T_NAND,
 T_NOR,
 T_XNOR,
 // Literals
 T_TRUE,
 T_FALSE,
 T_BYTE_LITERAL,
 T_CHAR_LITERAL,
 T_SHORT_LITERAL,
 T_INTEGER_LITERAL,
 T_LONG_LITERAL,
 // Types
 T_VOID,
 T_BOOL,
 T_BYTE,
 T_CHAR,
 T_SHORT,
 T_INT,
 T_LONG,
 // Assignment
 T_ASSIGN,
 // Keywords
 T_PRINT,
 T_IF,
 T_ELSE,
 T_WHILE,
 T_FOR,
 T_RETURN,
 // Miscellaneous
 T_SEMICOLON,
 T_LEFT_PAREN,
 T_RIGHT_PAREN,
 T_LEFT_BRACE,
 T_RIGHT_BRACE,
 T_IDENTIFIER,
 T_LVALUE_IDENTIFIER,
 T_AST_GLUE,
 T_FUNCTION_DECLARATION,
 T_FUNCTION_CALL,
} TokenType;
 
#define NUMBER_LITERAL_BASE_PREFIX '0'
#define NUMBER_LITERAL_BIN_PREFIX 'b'
#define NUMBER_LITERAL_OCT_PREFIX 'o'
#define NUMBER_LITERAL_HEX_PREFIX 'x'
#define NUMBER_LITERAL_LONG_SUFFIX 'L'
 
#define NUMBER_LITERAL_SPACING_SEPARATOR '\''
#define NUMBER_LITERAL_BASE_SEPARATOR '#'
 
static char* tokenStrings[] = {"EOF",
 "+",
 "-",
 "*",
 "/",
 "**",
 "==",
 "!=",
 "<",
 ">",
 "<=",
 ">=",
 "and",
 "or",
 "xor",
 "nand",
 "nor",
 "xnor",
 "true",
 "false",
 "byte literal",
 "character literal",
 "short literal",
 "integer literal",
 "long literal",
 "void",
 "bool",
 "byte",
 "char",
 "short",
 "int",
 "long",
 "=",
 "print",
 "if",
 "else",
 "while",
 "for",
 "return",
 ";",
 "(",
 ")",
 "{",
 "}",
 "identifier",
 "lvalue identifier",
 "ast glue",
 "function",
 "function call"};
 
#define TOKENTYPE_IS_BINARY_ARITHMETIC(type) (type >= T_PLUS && type <= T_EXPONENT)
 
#define TOKENTYPE_IS_TYPE(type) (type >= T_VOID && type <= T_LONG)
 
#define TOKENTYPE_IS_NUMBER_TYPE(tt) \
 ((tt >= T_BOOL && tt <= T_LONG) || (T_TRUE <= tt && tt <= T_LONG_LITERAL))
 
#define TOKENTYPE_IS_LITERAL(type) (type >= T_TRUE && type <= T_LONG_LITERAL)
 
#define TOKENTYPE_IS_BOOL_LITERAL(type) (type >= T_TRUE && type <= T_FALSE)
 
#define TOKENTYPE_IS_IDENTIFIER(type) (type >= T_IDENTIFIER && type <= T_LVALUE_IDENTIFIER)
 
#define TOKENTYPE_IS_COMPARATOR(type) (type >= T_EQ && type <= T_GE)
 
#define TOKENTYPE_IS_LOGICAL_OPERATOR(type) (type >= T_AND && type <= T_XNOR)
 
#define number_literal_type long long int
 
#define MAX_NUMBER_LITERAL_DIGITS 19
 
typedef struct position {
 char filename[256];
 int line_number;
 int char_number;
} position;
 
typedef struct Token {
 TokenType type;
 position pos;
 union {
 Number number_value;
 char symbol_name[MAX_IDENTIFIER_LENGTH];
 } value;
} Token;
 
char next(void);
void put_back_into_stream(char c);
bool scan(Token* t);
 
#endif /* SCAN_H */