expressionbase.c

   1 #include "expressionbase.h"
   2 #include <stdlib.h>
   3
   4 ExpressionBase *new_expression_base() {
   5     ExpressionBase *base = malloc(sizeof(ExpressionBase));
   6     return base;
   7 }
   8
   9 void add_tail(ExpressionBase *base, Expression *expr) {
  10     expr->next = 0;
  11     expr->prev = 0;
  12
  13     if (base->last) {
  14         base->last->next = expr;
  15         expr->prev = base->last;
  16     }
  17     if (base->first == 0) base->first = expr;
  18     base->last = expr;
  19     return;
  20 }