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,
    // Pointer operators
    T_AMPERSAND,
    T_DEREFERENCE,
    // Literals
    T_TRUE,
    T_FALSE,
    T_CHAR_LITERAL,
    T_SHORT_LITERAL,
    T_INTEGER_LITERAL,
    T_LONG_LITERAL,
    // Types
    T_VOID,
    T_BOOL,
    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_COMMA,
    // T_LVALUE_IDENTIFIER,
    T_AST_GLUE,
    T_FUNCTION_DECLARATION,
    T_FUNCTION_CALL,
    // Enum End value
    TOKENTYPE_MAX
} 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", "+", "-", "*", "/", "pow", "==", "!=", "<", ">", "<=", ">=", "and", "or", "xor", "nand",
    "nor", "xnor", "&", "*", "true", "false", "character literal", "short literal",
    "integer literal", "long literal", "void", "bool", "char", "short", "int", "long", "=", "print",
    "if", "else", "while", "for", "return", ";", "(", ")", "{", "}", "identifier", ",",
    //    "lvalue identifier",
    "ast glue", "function", "function call", "TOKENTYPE_MAX"};
 
#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_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 token_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();
 
#endif /* SCAN_H */