node.h

/*
@author: Huzaifa Naseer
*/

#ifndef NODE_H
#define NODE_H

enum node_type_e {
  NODE_COMMAND, /* Command */
  NODE_VAR,     /* variable name (or simple, a word)*/
};

enum val_type_e {
  VAL_SINT = 1, /* signed integer */
  VAL_UINT,     /* unsigned integer */
  VAL_SSLONG,   /* signed long long */
  VAL_ULLONG,   /* unsigned long long */
  VAL_FLOAT,    /* float */
  VAL_LDOUBLE,  /* long double */
  VAL_CHR,      /* char */
  VAL_STR,      /* str, (char pointer)*/
};

union symval_u {
  long sint;
  unsigned long uint;
  long long sllong;
  unsigned long long ullong;
  double sfloat;
  long double ldouble;
  char chr;
  char *str;
};

struct node_s {
  enum node_type_e type;      /* node type */
  enum val_type_e val_type;   /* value type */
  union symval_u val;         /* value */
  int children;               /* Number of child nodes */
  struct node_s *first_child; /* first child node */
  struct node_s *next_sibling,
      *prev_sibling; /* Pointers to next/prev siblings*/
};

struct node_s *new_node(enum node_type_e type);
void add_child_node(struct node_s *parent, struct node_s *child);
void free_node_tree(struct node_s *node);
void set_node_val_str(struct node_s *node, char *val);

#endif