ast.c

   1 #include <stdlib.h>
   2 #include "ast.h"
   3
   4 AstNode *
   5 ast_node_new(int kind, int type, int linenum, Symbol *symbol)
   6 {
   7     int i;
   8     AstNode *node;
   9
  10     node = (AstNode *) malloc (sizeof(AstNode));
  11
  12     node->kind = kind;
  13     node->type = type;
  14     node->linenum = linenum;
  15     node->symbol = symbol;
  16
  17     for (i = 0; i < 3; i++)
  18         node->children[i] = NULL;
  19     node->next = NULL;
  20
  21     return node;
  22 }
  23
  24 void
  25 ast_node_destroy(AstNode *node)
  26 {
  27     int i;
  28
  29     if (node == NULL)
  30         return;
  31
  32     for (i = 0; i < 3; i++)
  33         ast_node_destroy(node->children[i]);
  34     ast_node_destroy(node->next);
  35
  36     free(node);
  37 }
  38