Lexer.h

#include "string_t.h"

#include <signal.h>

#define CRASH_NOW()  raise(SIGSEGV); 

#define EOT -9999

#define Is_EndOfFile(str,pos) at(str,pos) == EOF

/*#define NL_CHECK(pos)     if (NULL_CHECK(pos))    \

  {                  \

  pos = 0;         \

  line_no++;       \

  }

  */

//#define ALPHA_NUM_CHECK(pos) ((CHAR_AT(pos, line_no) >= 'a' && CHAR_AT(pos, line_no) <= 'z') || (CHAR_AT(pos, line_no) >= 'A' && CHAR_AT(pos, line_no) <= 'Z') || (CHAR_AT(pos, line_no) >= '0' && CHAR_AT(pos, line_no) <= '9'))

/* Macro Values for Tokens */

#define ELIPPSIS 0x1000

#define ADD_ASSIGN 0x1001

#define INC_OP 0x1002

#define SUB_ASSIGN 0x1003

#define DEC_OP 0x1004

#define DIV_ASSIGN 0x1005

#define MUL_ASSIGN 0x1006

#define MOD_ASSIGN 0x1007

#define AND_ASSIGN 0x1008

#define XOR_ASSIGN 0x1009

#define OR_ASSIGN 0x1010

#define NOT_ASSIGN 0x1011

#define RIGHT_OP 0x1012

#define LEFT_OP 0x1013

#define EQ_EQ_COND 0x1014

#define GRT_EQ_OP 0x1015

#define LESR_EQ_OP 0x1016

#define ID 0x2015

#define STROBJ 0x2016

#define INT_CONST 0x2017

#define CHAR_CONST 0x2018

#define F_CONST 0x2019

#define OCTAL_CONST 0x2020

#define USIGN_INT_CONST 0x2021

#define LONG_INT_CONST 0x2021

#define LONG_DOUBLE_CONST 0x2022

#define E_F_CONST 0x2023 // extended float const

#define ERR 0xff00

#define NOT_FOUND 0xff01

/* Keyword token */

#define AUTO 0

#define BREAK 1

#define CASE 2

#define CHAR 3

#define CONST 4

#define CONTINUE 5

#define DEFAULT 6

#define DO 7

#define DOUBLE 8

#define ELSE 9

#define ENUM 10

#define EXTERN 11

#define FLOAT 12

#define FOR 13

#define GOTO 14

#define IF 15

#define INT 16

#define LONG 17

#define REGISTER 18

#define RETURN 19

#define SHORT 20

#define SIGNED 21

#define SIZEOF 22

#define STATIC 23

#define STRUCT 24

#define SWITCH 25

#define TYPEDEF 26

#define UNION 27

#define UNSIGNED 28

#define VOID 29

#define VOLATILE 30

#define WHILE 31

int keyword_check(string_t str, bool *is_keyword);

int getTokenByPos(string_t str, int *k, string_t metadata);

#define NO_PREPROCESSOR 1

#ifdef NO_PREPROCESSOR

bool is_first(string_t str, char c);

#define is_prep(i)   if(is_first(str,i, '#')) \

{                                    \

   while (at(str, i) != '\n')         \

   {   pos++;                        \

line_no++; }                    \

}                                    \

#endif