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import os
import glob
import json
from jinja2 import Template
MONTAGELIB = os.path.join('../..', 'MontageLib')
CTYPE = {}
CTYPE['int'] = 'int '
CTYPE['int*'] = 'int *'
CTYPE['integer'] = 'int '
CTYPE['char'] = 'char '
CTYPE['string'] = 'char *'
CTYPE['string*'] = 'char *'
CTYPE['boolean'] = 'int '
CTYPE['boolean*'] = 'int *'
CTYPE['double'] = 'double '
CTYPE['double*'] = 'double *'
PTYPE = {}
PTYPE['int'] = 'int'
PTYPE['int*'] = 'np.ndarray'
PTYPE['integer'] = 'int'
PTYPE['char'] = 'str'
PTYPE['string'] = 'str'
PTYPE['string*'] = 'str'
PTYPE['boolean'] = 'bool'
PTYPE['boolean*'] = 'np.ndarray'
PTYPE['double'] = 'float'
PTYPE['double*'] = 'np.ndarray'
with open('templates/template.pxd', 'r') as f:
template_pxd = Template(f.read())
with open('templates/template.pyx', 'r') as f:
template_pyx = Template(f.read())
with open('templates/template_main.pyx', 'r') as f:
template_main_pyx = Template(f.read())
functions = []
for json_file in glob.glob(os.path.join(MONTAGELIB, '*', '*.json')):
print("Parsing {0}...".format(json_file))
with open(json_file, 'r') as fjson:
data = json.load(fjson)
if data['return'] is None:
continue
# We set up our own dictionary that we will then pass on to the jinja2
# templates.
function = {}
# The name and description of the function
function['name'] = data['function']
function['summary'] = data['desc']
# We now compile a list of arguments with defaults and arguments without
# defaults - this is used in several places below. The arguments without
# defaults come first.
sorted_args = [arg for arg in data['arguments'] if 'default' not in arg]
sorted_args += [arg for arg in data['arguments'] if 'default' in arg]
# We now set up the lists of arguments.
# Normal list of arguments
function['arguments'] = [arg['name'] for arg in data['arguments']]
# List of arguments to use in the C function declaration (functions
# defined using cdef).
function['arguments_cdef'] = []
# List of arguments to use when calling the cdef wrapper from the normal
# Cython function - this has to include converting string arguments to
# bytes strings with .encode('ascii') and converting arrays with e.g.
# .data.as_doubles.
function['arguments_py_to_cdef'] = []
for arg in data['arguments']:
argument = "{0}{1}".format(CTYPE[arg['type']], arg['name'])
function['arguments_cdef'].append(argument)
function['arguments_with_defaults'] = []
for arg in sorted_args:
if 'default' in arg:
function['arguments_with_defaults'].append(arg['name'] + '=' + repr(arg['default']))
else:
function['arguments_with_defaults'].append(arg['name'])
function['array'] = []
function['arguments_py_to_cdef'] = []
for arg in data['arguments']:
if arg['type'] == 'double*':
function['array'].append("cdef _array.array {0}_arr = _array.array('d', {0})".format(arg['name']))
function['arguments_py_to_cdef'].append('{0}_arr.data.as_doubles'.format(arg['name']))
elif arg['type'] == 'int*':
function['array'].append("cdef _array.array {0}_arr = _array.array('i', {0})".format(arg['name']))
function['arguments_py_to_cdef'].append('{0}_arr.data.as_ints'.format(arg['name']))
elif arg['type'] == 'boolean*':
function['array'].append("cdef _array.array {0}_arr = _array.array('i', {0})".format(arg['name']))
function['arguments_py_to_cdef'].append('{0}_arr.data.as_ints'.format(arg['name']))
else:
if 'string' in arg['type']:
function['arguments_py_to_cdef'].append(arg['name'] + ".encode('ascii')")
else:
function['arguments_py_to_cdef'].append(arg['name'])
function['struct_vars'] = []
function['struct_vars_decl'] = []
for ret in data['return']:
struct_var = "{0}{1}".format(CTYPE[ret['type']], ret['name'])
function['struct_vars'].append(ret['name'])
function['struct_vars_decl'].append(struct_var)
function['docstring_arguments'] = []
for inp in sorted_args:
arg = {}
arg['name'] = inp['name']
arg['type'] = PTYPE[inp['type']]
if 'default' in inp:
arg['type'] += ", optional"
arg['description'] = inp['desc']
function['docstring_arguments'].append(arg)
function['return_arguments'] = []
for ret in data['return']:
arg = {}
arg['name'] = ret['name']
arg['type'] = PTYPE[ret['type']]
arg['description'] = ret['desc']
function['return_arguments'].append(arg)
functions.append(function)
with open('MontagePy/wrappers.pxd', 'w') as f:
f.write(template_pxd.render(functions=functions))
with open('MontagePy/_wrappers.pyx', 'w') as f:
f.write(template_pyx.render(functions=functions))
with open('MontagePy/main.pyx', 'w') as f:
f.write(template_main_pyx.render(functions=functions))
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