Changeset 5923:ef0306350890

Timestamp:

08/15/07 09:58:45 (6 years ago)

Author:

'Martin Albrecht <malb@…

Branch:

default

Message:

set _zero/_one_element for RealField?

File:

• sage/rings/real_mpfr.pyx (modified) (3 diffs)

sage/rings/real_mpfr.pyx

@@ -165 +165 @@
 
     def __init__(self, int prec=53, int sci_not=0, rnd="RNDN"):
+        cdef RealNumber rn
+
         if prec < MPFR_PREC_MIN or prec > MPFR_PREC_MAX:
             raise ValueError, "prec (=%s) must be >= %s and <= %s."%(
@@ -179 +181 @@
         ParentWithGens.__init__(self, self, tuple([]), False)
 
+        # hack, we cannot call the constructor here
+        rn = PY_NEW(RealNumber)
+        rn._parent = self
+        mpfr_init2(rn.value, self.__prec)
+        rn.init = 1
+        mpfr_set_d(rn.value, 0.0, self.rnd)
+        self._zero_element = rn
+
+        rn = PY_NEW(RealNumber)
+        rn._parent = self
+        mpfr_init2(rn.value, self.__prec)
+        rn.init = 1
+        mpfr_set_d(rn.value, 1.0, self.rnd)
+        self._one_element = rn
+
     cdef RealNumber _new(self):
         """
@@ -530 +547 @@
         """
         cdef RealNumber x
-        x = PY_NEW(RealNumber)
+        x = PY_NEW(RealNumber) 
         x._parent = self._parent
         mpfr_init2(x.value, (<RealField>self._parent).__prec)