#ifndef    __SYMTAB_H
#define    __SYMTAB_H


#ifdef __cplusplus
extern "C" {
#endif

/******************************
  SYMBOL is a node of symlist:
 */
typedef struct symbol SYMBOL;
struct symbol
{
  char *name;          /* Variable name */
  int   type;          /* VARIABLE, SECTION, REPO, NUMERICAL, STRING, PATH */
  union
  {
    int   value;       /* for NUMERICAL */
    char *string;      /* for STRING */
    char *path;        /* for PATH */
  } u;

  struct symbol *list; /* The list of variables. Used for SECTION and REPO */

  struct symbol *next; /* Next Symbol */
};

/**********************************************
  SYMTAB is an entry of the stack of symlists:
 */
typedef struct symtab SYMTAB;
struct symtab
{
  SYMBOL **symlist;
  struct symtab *next; /* Next Entry */
};


extern SYMBOL *symlist;

extern void init_symtab( void );
extern void push_symlist( SYMBOL **head );
extern void pop_symlist( void );
extern void fini_symtab( void );

extern void reverse_symlist( SYMBOL **head );
extern void remove_consts( SYMBOL **head );

//debug
extern void print_symlist( int indent, SYMBOL *head );

extern SYMBOL *install( const char *s, int type, ... );
extern SYMBOL *lookup( const char *s );
extern SYMBOL *lookup_section( const char *s );
extern SYMBOL *lookup_repo( const char *s );

extern SYMBOL *assign_value( SYMBOL *dest, SYMBOL *src );



#ifdef __cplusplus
}
#endif

#endif  /* __SYMTAB_H */