1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
#!/usr/bin/env python2
import argparse
import os
import sys
import logging
from vapi_c_gen import CField, CStruct, CSimpleType, CStructType, CMessage, \
json_to_c_header_name
from vapi_json_parser import JsonParser
class CppField(CField):
pass
class CppStruct(CStruct):
pass
class CppSimpleType (CSimpleType):
pass
class CppStructType (CStructType, CppStruct):
pass
class CppMessage (CMessage):
def get_swap_to_be_template_instantiation(self):
return "\n".join([
"template <> inline void vapi_swap_to_be<%s>(%s *msg)" %
(self.get_c_name(), self.get_c_name()),
"{",
" %s(msg);" % self.get_swap_to_be_func_name(),
"}",
])
def get_swap_to_host_template_instantiation(self):
return "\n".join([
"template <> inline void vapi_swap_to_host<%s>(%s *msg)" %
(self.get_c_name(), self.get_c_name()),
"{",
" %s(msg);" % self.get_swap_to_host_func_name(),
"}",
])
def get_alloc_template_instantiation(self):
return "\n".join([
"template <> inline %s* vapi_alloc<%s%s>"
"(Connection &con%s)" %
(self.get_c_name(), self.get_c_name(),
", size_t" * len(self.get_alloc_vla_param_names()),
"".join([", size_t %s" % n for n in
self.get_alloc_vla_param_names()])
),
"{",
" %s* result = %s(con.vapi_ctx%s);" %
(self.get_c_name(), self.get_alloc_func_name(),
"".join([", %s" % n
for n in self.get_alloc_vla_param_names()])),
"#if VAPI_CPP_DEBUG_LEAKS",
" con.on_shm_data_alloc(result);",
"#endif",
" return result;",
"}",
])
def get_cpp_name(self):
return "%s%s" % (self.name[0].upper(), self.name[1:])
def get_req_template_name(self):
if self.is_dump():
template = "Dump"
else:
template = "Request"
return "%s<%s, %s%s>" % (
template,
self.get_c_name(),
self.reply.get_c_name(),
"".join([", size_t"] * len(self.get_alloc_vla_param_names()))
)
def get_req_template_instantiation(self):
return "template class %s;" % self.get_req_template_name()
def get_type_alias(self):
return "using %s = %s;" % (
self.get_cpp_name(), self.get_req_template_name())
def get_reply_template_name(self):
return "Msg<%s>" % (self.get_c_name())
def get_reply_type_alias(self):
return "using %s = %s;" % (
self.get_cpp_name(), self.get_reply_template_name())
def get_msg_class_instantiation(self):
return "template class Msg<%s>;" % self.get_c_name()
def get_get_msg_id_t_instantiation(self):
return "\n".join([
("template <> inline vapi_msg_id_t vapi_get_msg_id_t<%s>()"
% self.get_c_name()),
"{",
" return ::%s; " % self.get_msg_id_name(),
"}",
"",
("template <> inline vapi_msg_id_t "
"vapi_get_msg_id_t<Msg<%s>>()" % self.get_c_name()),
"{",
" return ::%s; " % self.get_msg_id_name(),
"}",
])
def get_cpp_constructor(self):
return '\n'.join([
('static void __attribute__((constructor)) '
'__vapi_cpp_constructor_%s()'
% self.name),
'{',
(' vapi::vapi_msg_set_msg_id<%s>(%s);' % (
self.get_c_name(), self.get_msg_id_name())),
'}',
])
def gen_json_header(parser, logger, j, io, gen_h_prefix, add_debug_comments):
logger.info("Generating header `%s'" % io.name)
orig_stdout = sys.stdout
sys.stdout = io
d, f = os.path.split(j)
include_guard = "__included_hpp_%s" % (
f.replace(".", "_").replace("/", "_").replace("-", "_"))
print("#ifndef %s" % include_guard)
print("#define %s" % include_guard)
print("")
print("#include <vapi/vapi.hpp>")
print("#include <%s%s>" % (gen_h_prefix, json_to_c_header_name(f)))
print("")
print("namespace vapi {")
print("")
for m in parser.messages_by_json[j].values():
# utility functions need to go first, otherwise internal instantiation
# causes headaches ...
if add_debug_comments:
print("/* m.get_swap_to_be_template_instantiation() */")
print("%s" % m.get_swap_to_be_template_instantiation())
print("")
if add_debug_comments:
print("/* m.get_swap_to_host_template_instantiation() */")
print("%s" % m.get_swap_to_host_template_instantiation())
print("")
if add_debug_comments:
print("/* m.get_get_msg_id_t_instantiation() */")
print("%s" % m.get_get_msg_id_t_instantiation())
print("")
if add_debug_comments:
print("/* m.get_cpp_constructor() */")
print("%s" % m.get_cpp_constructor())
print("")
if not m.is_reply():
if add_debug_comments:
print("/* m.get_alloc_template_instantiation() */")
print("%s" % m.get_alloc_template_instantiation())
print("")
if add_debug_comments:
print("/* m.get_msg_class_instantiation() */")
print("%s" % m.get_msg_class_instantiation())
print("")
if m.is_reply():
if add_debug_comments:
print("/* m.get_reply_type_alias() */")
print("%s" % m.get_reply_type_alias())
continue
if add_debug_comments:
print("/* m.get_req_template_instantiation() */")
print("%s" % m.get_req_template_instantiation())
print("")
if add_debug_comments:
print("/* m.get_type_alias() */")
print("%s" % m.get_type_alias())
print("")
print("}") # namespace vapi
print("#endif")
sys.stdout = orig_stdout
def json_to_cpp_header_name(json_name):
if json_name.endswith(".json"):
return "%s.vapi.hpp" % os.path.splitext(json_name)[0]
raise Exception("Unexpected json name `%s'!" % json_name)
def gen_cpp_headers(parser, logger, prefix, gen_h_prefix, remove_path,
add_debug_comments=False):
if prefix == "" or prefix is None:
prefix = ""
else:
prefix = "%s/" % prefix
if gen_h_prefix is None:
gen_h_prefix = ""
else:
gen_h_prefix = "%s/" % gen_h_prefix
for j in parser.json_files:
if remove_path:
d, f = os.path.split(j)
else:
f = j
with open('%s%s' % (prefix, json_to_cpp_header_name(f)), "w") as io:
gen_json_header(parser, logger, j, io,
gen_h_prefix, add_debug_comments)
if __name__ == '__main__':
try:
verbose = int(os.getenv("V", 0))
except:
verbose = 0
if verbose >= 2:
log_level = 10
elif verbose == 1:
log_level = 20
else:
log_level = 40
logging.basicConfig(stream=sys.stdout, level=log_level)
logger = logging.getLogger("VAPI CPP GEN")
logger.setLevel(log_level)
argparser = argparse.ArgumentParser(description="VPP C++ API generator")
argparser.add_argument('files', metavar='api-file', action='append',
type=str, help='json api file'
'(may be specified multiple times)')
argparser.add_argument('--prefix', action='store', default=None,
help='path prefix')
argparser.add_argument('--gen-h-prefix', action='store', default=None,
help='generated C header prefix')
argparser.add_argument('--remove-path', action='store_true',
help='remove path from filename')
args = argparser.parse_args()
jsonparser = JsonParser(logger, args.files,
simple_type_class=CppSimpleType,
struct_type_class=CppStructType,
field_class=CppField,
message_class=CppMessage)
gen_cpp_headers(jsonparser, logger, args.prefix, args.gen_h_prefix,
args.remove_path)
for e in jsonparser.exceptions:
logger.warning(e)
|
