def _wrhd_special(self, name, val):
"""Provide write access to special header items of type '?' to _rdhd"""
if name == 'freqs':
h = self.haccess(name, 'write')
o = _miriad.hwrite(h, 0, val[0], 'i')
offset = 8
for i,v in enumerate(val[1:]):
if i % 3 == 0: o = _miriad.hwrite(h, offset, v, 'i')
else: o = _miriad.hwrite(h, offset, v, 'd')
offset += 8
_miriad.hdaccess(h)
else: raise ValueError('Unknown special header: ' + name)
def _wrhd_special(self, name, val):
"""Provide write access to special header items of type '?' to _rdhd"""
if name == 'freqs':
h = self.haccess(name, 'write')
o = _miriad.hwrite(h, 0, val[0], 'i')
offset = 8
for i,v in enumerate(val[1:]):
if i % 3 == 0: o = _miriad.hwrite(h, offset, v, 'i')
else: o = _miriad.hwrite(h, offset, v, 'd')
offset += 8
_miriad.hdaccess(h)
else: raise ValueError('Unknown special header: ' + name)
def _wrhd(self, name, val):
"""Provide write access to header items via low-level calls."""
type = itemtable[name]
if type == '?': return self._wrhd_special(name, val)
h = self.haccess(name, 'write')
if len(type) == 1:
try: len(val)
except(TypeError): val = [val]
if type == 'a': offset = 0
else: offset = _miriad.hwrite_init(h, type)
for v in val: offset += _miriad.hwrite(h, offset, v, type)
else:
offset = _miriad.hwrite_init(h, 'b')
for v, t in zip(val,type): offset += _miriad.hwrite(h,offset,v,t)
_miriad.hdaccess(h)
def _wrhd(self, name, val):
"""Provide write access to header items via low-level calls."""
type = itemtable[name]
if type == '?': return self._wrhd_special(name, val)
h = self.haccess(name, 'write')
if len(type) == 1:
try: len(val)
except(TypeError): val = [val]
if type == 'a': offset = 0
else: offset = _miriad.hwrite_init(h, type)
for v in val: offset += _miriad.hwrite(h, offset, v, type)
else:
offset = _miriad.hwrite_init(h, 'b')
for v, t in zip(val,type): offset += _miriad.hwrite(h,offset,v,t)
_miriad.hdaccess(h)
