--- /dev/null
+#ifndef _PSI_CALC_H
+#define _PSI_CALC_H
+
+int psi_calc_num_exp(num_exp *exp, impl_val *strct, impl_val *res);
+
+static inline zend_long psi_long_num_exp(num_exp *exp, impl_val *strct) {
+ impl_val val = {0};
+
+ switch (psi_calc_num_exp(exp, strct, &val)) {
+ case PSI_T_UINT8: return val.u8;
+ case PSI_T_UINT16: return val.u16;
+ case PSI_T_UINT32: return val.u32;
+ case PSI_T_UINT64: return val.u64; /* FIXME */
+ case PSI_T_INT8: return val.i8;
+ case PSI_T_INT16: return val.i16;
+ case PSI_T_INT32: return val.i32;
+ case PSI_T_INT64: return val.i64;
+ case PSI_T_FLOAT: return val.fval;
+ case PSI_T_DOUBLE: return val.dval;
+ EMPTY_SWITCH_DEFAULT_CASE();
+ }
+ return 0;
+}
+
+int psi_calc_add(int t1, impl_val *v1, int t2, impl_val *v2, impl_val *res);
+int psi_calc_sub(int t1, impl_val *v1, int t2, impl_val *v2, impl_val *res);
+int psi_calc_mul(int t1, impl_val *v1, int t2, impl_val *v2, impl_val *res);
+int psi_calc_div(int t1, impl_val *v1, int t2, impl_val *v2, impl_val *res);
+
+#endif