iqgen: updated cython bindings for l1ca

Updated cython bindings for GPS L1 C/A message generation.

Author: valeri-atamaniouk

python/swiftnav/bits.pyx

@@ -12,10 +12,23 @@
 Bit field packing, unpacking and utility functions.
 
 """
-
+from swiftnav.bits cimport parity as c_parity
 
 def parity(x):
-  raise NotImplementedError
+  '''
+  Cython wrapper for parity function
+
+  Parameters
+  ----------
+  x : int
+    Value for parity computation
+
+  Returns
+  -------
+  int
+    Parity value: 1 or 0.
+  '''
+  return c_parity(x)
 
 def getbitu(buff,  pos,  length):
   raise NotImplementedError

python/swiftnav/ephemeris.pyx

@@ -24,12 +24,19 @@ cdef class Ephemeris:
 
   def __init__(self, **kwargs):
     memset(&self._thisptr, 0, sizeof(ephemeris_t))
-    self._thisptr.sid = kwargs.pop('sid')
-    self._thisptr.toe = kwargs.pop('toe')
-    self._thisptr.ura = kwargs.pop('ura')
-    self._thisptr.fit_interval = kwargs.pop('fit_interval')
-    self._thisptr.valid = kwargs.pop('valid')
-    self._thisptr.healthy = kwargs.pop('healthy')
+
+    if 'sid' in kwargs:
+      self._thisptr.sid = kwargs.pop('sid')
+    if 'toe' in kwargs:
+      self._thisptr.toe = kwargs.pop('toe')
+    if 'ura' in kwargs:
+      self._thisptr.ura = kwargs.pop('ura')
+    if 'fit_interval' in kwargs:
+      self._thisptr.fit_interval = kwargs.pop('fit_interval')
+    if 'valid' in kwargs:
+      self._thisptr.valid = kwargs.pop('valid')
+    if 'healthy' in kwargs:
+      self._thisptr.healthy = kwargs.pop('healthy')
     if 'kepler' in kwargs:
       self._thisptr.kepler = kwargs.pop('kepler')
     elif 'xyz' in kwargs:

python/swiftnav/nav_msg.pxd

@@ -44,3 +44,4 @@ cdef extern from "libswiftnav/nav_msg.h":
 
 cdef class NavMsg:
   cdef nav_msg_t _thisptr
+

python/swiftnav/nav_msg.pyx

@@ -9,7 +9,6 @@
 
 # cython: embedsignature=True
 
-from ephemeris cimport ephemeris_t
 from fmt_utils import fmt_repr
 from time cimport gps_time_t
 from signal cimport gnss_signal_t
@@ -42,7 +41,8 @@ cdef class NavMsg:
 
   def process_subframe(self, sid, d):
     cdef gps_l1ca_decoded_data_t tmp_d = d._thisptr
-    return process_subframe(&self._thisptr, sid, &tmp_d)
+    cdef gnss_signal_t tmp_sid = sid._thisptr
+    return process_subframe(&self._thisptr, tmp_sid, &tmp_d)
 
   def __richcmp__(self, other, op):
     """