#ifndef LANGSCAN_C_H
#define LANGSCAN_C_H

#define LANGSCAN_C_TOKEN_LIST \
     LANGSCAN_C_TOKEN(classdecl) \
     LANGSCAN_C_TOKEN(classdef) \
     LANGSCAN_C_TOKEN(classref) \
     LANGSCAN_C_TOKEN(preproc_beg) \
     LANGSCAN_C_TOKEN(preproc_end) \
     LANGSCAN_C_TOKEN(character) \
     LANGSCAN_C_TOKEN(integer) \
     LANGSCAN_C_TOKEN(floating) \
     LANGSCAN_C_TOKEN(string) \
     LANGSCAN_C_TOKEN(ident) \
     LANGSCAN_C_TOKEN(punct) \
     LANGSCAN_C_TOKEN(comment) \
     LANGSCAN_C_TOKEN(space)

typedef enum {
  langscan_c_eof = 0,
#define LANGSCAN_C_TOKEN(name) langscan_c_##name,
  LANGSCAN_C_TOKEN_LIST
#undef LANGSCAN_C_TOKEN
} langscan_c_token_t;

typedef struct {
  int beg_lineno;
  int beg_columnno;
  int beg_byteno;
  int end_lineno;
  int end_columnno;
  int end_byteno;
  int eof;
  char *text;
  int leng;
  size_t (*user_read)(void **user_data_p, char *buf, size_t maxlen);
  void *user_data;
} langscan_c_lex_extra_t;

typedef struct langscan_c_tokenizer_tag {
  langscan_c_lex_extra_t *extra;
  void *scanner;
} langscan_c_tokenizer_t;

typedef size_t (*user_read_t)(void **user_data_p, char *buf, size_t maxlen);

langscan_c_tokenizer_t *langscan_c_make_tokenizer(user_read_t user_read, void *user_data);
langscan_c_token_t langscan_c_get_token(langscan_c_tokenizer_t *tokenizer);
void langscan_c_free_tokenizer(langscan_c_tokenizer_t *tokenizer);

user_read_t langscan_c_tokenizer_get_user_read(langscan_c_tokenizer_t *tokenizer);
void *langscan_c_tokenizer_get_user_data(langscan_c_tokenizer_t *tokenizer);

const char *langscan_c_token_name(langscan_c_token_t token);
#define langscan_c_curtoken_beg_lineno(tokenizer) ((tokenizer)->extra->beg_lineno)
#define langscan_c_curtoken_beg_columnno(tokenizer) ((tokenizer)->extra->beg_columnno)
#define langscan_c_curtoken_beg_byteno(tokenizer) ((tokenizer)->extra->beg_byteno)
#define langscan_c_curtoken_end_lineno(tokenizer) ((tokenizer)->extra->end_lineno)
#define langscan_c_curtoken_end_columnno(tokenizer) ((tokenizer)->extra->end_columnno)
#define langscan_c_curtoken_end_byteno(tokenizer) ((tokenizer)->extra->end_byteno)
#define langscan_c_curtoken_text(tokenizer) ((tokenizer)->extra->text)
#define langscan_c_curtoken_leng(tokenizer) ((tokenizer)->extra->leng)

void langscan_c_extract_functions(langscan_c_tokenizer_t *);

#endif