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#!/usr/bin/env python
"""
Generate function define macros.
"""
from __future__ import print_function
import string
import sys
import os
# type -> (<c type if used as parameter>, <c type if used as ret type>,
# <function to get value from array>,
# <function to set value to the ret_object>,
# <function to set value to array>,
# <default_ret_value>)
type_table = {
"string": ("const char*",
"char*",
"json_array_get_string_or_null_element",
"searpc_set_string_to_ret_object",
"json_array_add_string_or_null_element",
"NULL"),
"int": ("int",
"int",
"json_array_get_int_element",
"searpc_set_int_to_ret_object",
"json_array_add_int_element",
"-1"),
"int64": ("gint64",
"gint64",
"json_array_get_int_element",
"searpc_set_int_to_ret_object",
"json_array_add_int_element",
"-1"),
"object": ("GObject*",
"GObject*",
"",
"searpc_set_object_to_ret_object",
"",
"NULL"),
"objlist": ("GList*",
"GList*",
"",
"searpc_set_objlist_to_ret_object",
"",
"NULL"),
"json": ("const json_t*",
"json_t*",
"json_array_get_json_or_null_element",
"searpc_set_json_to_ret_object",
"json_array_add_json_or_null_element",
"NULL"),
}
marshal_template = r"""
static char *
${marshal_name} (void *func, json_t *param_array, gsize *ret_len)
{
GError *error = NULL;
${get_parameters}
${func_call}
json_t *object = json_object ();
${convert_ret}
return searpc_marshal_set_ret_common (object, ret_len, error);
}
"""
def generate_marshal(ret_type, arg_types):
ret_type_item = type_table[ret_type]
ret_type_in_c = ret_type_item[1]
template = string.Template(marshal_template)
if len(arg_types) == 0:
marshal_name = "marshal_" + ret_type + "__void"
else:
marshal_name = "marshal_" + ret_type + "__" + ('_'.join(arg_types))
get_parameters = ""
for i, arg_type in enumerate(arg_types):
type_item = type_table[arg_type]
stmt = " %s param%d = %s (param_array, %d);\n" %(
type_item[0], i+1, type_item[2], i+1)
get_parameters += stmt
# func_prototype should be something like
# GList* (*)(const char*, int, GError **)
func_prototype = ret_type_in_c + " (*)("
for arg_type in arg_types:
func_prototype += type_table[arg_type][0] + ", "
func_prototype += "GError **)"
func_args = ""
for i in range(1, len(arg_types)+1):
func_args += "param%d, " % (i)
func_args += "&error"
func_call = "%s ret = ((%s)func) (%s);" % (ret_type_in_c, func_prototype,
func_args)
convert_ret = "%s (object, ret);" % ret_type_item[3]
return template.substitute(marshal_name=marshal_name,
get_parameters=get_parameters,
func_call=func_call,
convert_ret=convert_ret)
def write_file(f, s):
f.write(s)
f.write('\n')
def gen_marshal_functions(f):
for item in func_table:
write_file(f, generate_marshal(item[0], item[1]))
marshal_register_item = r"""
{
searpc_server_register_marshal (${signature_name}(), ${marshal_name});
}
"""
def generate_marshal_register_item(ret_type, arg_types):
if len(arg_types) == 0:
marshal_name = "marshal_" + ret_type + "__void"
else:
marshal_name = "marshal_" + ret_type + "__" + ('_'.join(arg_types))
if len(arg_types) == 0:
signature_name = "searpc_signature_" + ret_type + "__void"
else:
signature_name = "searpc_signature_" + ret_type + "__" + (
'_'.join(arg_types))
return string.Template(marshal_register_item).substitute(
marshal_name=marshal_name,
signature_name=signature_name)
def gen_marshal_register_function(f):
write_file(f, "static void register_marshals()""")
write_file(f, "{")
for item in func_table:
write_file(f, generate_marshal_register_item(item[0], item[1]))
write_file(f, "}")
signature_template = r"""
inline static gchar *
${signature_name}()
{
return searpc_compute_signature (${args});
}
"""
def generate_signature(ret_type, arg_types):
ret_type_item = type_table[ret_type]
ret_type_in_c = ret_type_item[1]
if len(arg_types) == 0:
signature_name = "searpc_signature_" + ret_type + "__void"
else:
signature_name = "searpc_signature_" + ret_type + "__" + (
'_'.join(arg_types))
args = "\"" + ret_type + "\"" + ", " + str(len(arg_types))
for arg_type in arg_types:
args += ", " + "\"" + arg_type + "\""
template = string.Template(signature_template)
return template.substitute(signature_name=signature_name, args=args)
def gen_signature_list():
with open('searpc-signature.h', 'w') as f:
for item in func_table:
write_file(f, generate_signature(item[0], item[1]))
if __name__ == "__main__":
import argparse
parser = argparse.ArgumentParser(description='Generate function signatures and marshals for using Searpc')
parser.add_argument('rpc_mod_file', nargs='?', help='the RPC module file name (default: rpc_table)')
args = parser.parse_args()
sys.path.append(os.getcwd())
# load function table
if args.rpc_mod_file:
abspath = os.path.abspath(args.rpc_mod_file)
with open(abspath, 'r') as fp:
exec(fp.read())
print("loaded func_table from %s" % abspath)
else:
# load from default rpc_table.py
from rpc_table import func_table
# gen code
with open('searpc-marshal.h', 'w') as marshal:
gen_marshal_functions(marshal)
gen_marshal_register_function(marshal)
gen_signature_list()
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