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Fix NgSpice shared FFI duplication #94

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Fix NgSpice shared FFI duplication #94

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10 changes: 7 additions & 3 deletions PySpice/Spice/NgSpice/Shared.py
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Original file line number Diff line number Diff line change
Expand Up @@ -360,6 +360,8 @@ def __init__(self, ngspice_id=0, send_data=False):

##############################################

already_read_ffi = False

def _load_library(self):

if ConfigInstall.OS.on_windows:
Expand All @@ -369,9 +371,11 @@ def _load_library(self):
if 'SPICE_LIB_DIR' not in os.environ:
os.environ['SPICE_LIB_DIR'] = os.path.join(self.NGSPICE_PATH, 'share', 'ngspice')

api_path = os.path.join(os.path.dirname(__file__), 'api.h')
with open(api_path) as f:
ffi.cdef(f.read())
if not NgSpiceShared.already_read_ffi:
NgSpiceShared.already_read_ffi = True
api_path = os.path.join(os.path.dirname(__file__), 'api.h')
with open(api_path) as f:
ffi.cdef(f.read())

if not self._ngspice_id:
library_prefix = ''
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