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ln
firmware
Commits
06df747a
Verified
Commit
06df747a
authored
5 years ago
by
rahix
Browse files
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refactor(api): Restructure API generation script
Signed-off-by:
Rahix
<
rahix@rahix.de
>
parent
15bb6ac6
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1 changed file
epicardium/api/genapi.py
+145
-146
145 additions, 146 deletions
epicardium/api/genapi.py
with
145 additions
and
146 deletions
epicardium/api/genapi.py
+
145
−
146
View file @
06df747a
import
argparse
import
contextlib
import
os
import
re
import
subprocess
MATCH_DECLARATION
=
re
.
compile
(
r
"
__GENERATE_API \$ __GEN_ID_(?P<id>\w+) \$ (?P<type>\w+(?:\*+|\s+))(?P<name>.+?)\((?P<args>.*?)\) \$
"
,
re
.
DOTALL
|
re
.
MULTILINE
,
)
MATCH_ARGS
=
re
.
compile
(
r
"
(?P<type>\w+(?:\*+|\s+))(?P<name>\w+),
"
)
def
parse_declarations
(
source
):
"""
Parse all declarations in the given source.
"""
declarations
=
[]
for
decl
in
MATCH_DECLARATION
.
finditer
(
source
):
id
=
decl
.
group
(
"
id
"
)
return_type
=
decl
.
group
(
"
type
"
).
strip
()
name
=
decl
.
group
(
"
name
"
)
args
=
[]
args_str
=
decl
.
group
(
"
args
"
)
# Parse arguments
for
arg
in
MATCH_ARGS
.
finditer
(
args_str
+
"
,
"
):
arg_type
=
arg
.
group
(
"
type
"
).
strip
()
arg_name
=
arg
.
group
(
"
name
"
)
args
.
append
({
"
type
"
:
arg_type
,
"
name
"
:
arg_name
,
"
sizeof
"
:
"
sizeof({})
"
.
format
(
arg_type
),
})
declarations
.
append
({
"
id
"
:
id
,
"
return_type
"
:
return_type
,
"
name
"
:
name
,
"
args
"
:
args
,
"
args_str
"
:
args_str
,
})
return
declarations
def
sizeof
(
args
):
"""
Return a string that describes the size of a list of arguments.
"""
return
"
+
"
.
join
(
a
[
"
sizeof
"
]
for
a
in
args
)
if
args
!=
[]
else
"
0
"
def
main
():
parser
=
argparse
.
ArgumentParser
(
...
...
@@ -20,169 +63,125 @@ def main():
)
args
=
parser
.
parse_args
()
with
contextlib
.
ExitStack
()
as
cx
:
# Run the preprocessor on the header file to get the API definitions.
#
# For this, we first need a source to include the header which contains
# an alternative definition of the `API` macro that marks definitions in
# a way we can find later on.
api_src
=
"""
\
# Run the preprocessor on the header file to get the API definitions.
#
# For this, we first need a source to include the header which contains
# an alternative definition of the `API` macro that marks definitions in
# a way we can find later on.
api_src
=
"""
\
#define API(id, def) __GENERATE_API $ __GEN_ID_##id $ def $
#include
"
{header}
"
"""
.
format
(
header
=
os
.
path
.
relpath
(
args
.
header
)
)
# Evaluate the preprocessor
source
=
subprocess
.
check_output
(
[
"
gcc
"
,
"
-E
"
,
"
-
"
],
input
=
api_src
.
encode
()
).
decode
()
# Parse the header for API definitions
matcher
=
re
.
compile
(
r
"
__GENERATE_API \$ __GEN_ID_(?P<id>\w+) \$ (?P<type>\w+(?:\*+|\s+))(?P<decl>.+?)\((?P<args>.*?)\) \$
"
,
re
.
DOTALL
|
re
.
MULTILINE
,
)
header
=
os
.
path
.
relpath
(
args
.
header
)
)
args_matcher
=
re
.
compile
(
r
"
(?P<type>(?:const )?\w+(?:\*+|\s+))(?P<name>\w+),
"
)
# Evaluate the preprocessor
source
=
subprocess
.
check_output
(
[
"
gcc
"
,
"
-E
"
,
"
-
"
],
input
=
api_src
.
encode
()
).
decode
()
# Open output files
f_client
=
cx
.
enter_context
(
open
(
args
.
client
,
"
w
"
))
f_server
=
cx
.
enter_context
(
open
(
args
.
server
,
"
w
"
))
declarations
=
parse_declarations
(
source
)
fmt_header
=
{
"
header
"
:
os
.
path
.
basename
(
args
.
header
)
}
print
(
"""
\
# Generate Client {{{
with
open
(
args
.
client
,
"
w
"
)
as
f_client
:
tmp
=
"""
\
#include <stdio.h>
#include
"
{}
"
#include
"
{
header
}
"
#include
"
api/caller.h
"
"""
.
format
(
os
.
path
.
basename
(
args
.
header
)
),
file
=
f_client
)
"""
f_client
.
write
(
tmp
.
format
(
**
fmt_header
))
print
(
"""
\
#include <stdio.h>
#include
"
{}
"
for
decl
in
declarations
:
decl
[
"
total_size
"
]
=
sizeof
(
decl
[
"
args
"
])
tmp
=
"""
\
void __api_dispatch_call(uint32_t id, void*buffer)
{{
switch (id) {{
"""
.
format
(
os
.
path
.
basename
(
args
.
header
)
),
file
=
f_server
)
for
match
in
matcher
.
finditer
(
source
):
api_id
=
match
.
group
(
"
id
"
)
api_return
=
match
.
group
(
"
type
"
).
strip
()
api_decl
=
match
.
group
(
"
decl
"
)
api_args
=
match
.
group
(
"
args
"
)
api_args_names
=
[]
api_args_types
=
[]
api_args_sizes
=
[]
# Destructure args
for
match
in
args_matcher
.
finditer
(
api_args
+
"
,
"
):
arg_type
=
match
.
group
(
"
type
"
).
strip
()
arg_name
=
match
.
group
(
"
name
"
)
api_args_names
.
append
(
arg_name
)
api_args_types
.
append
(
arg_type
)
api_args_sizes
.
append
(
"
sizeof({})
"
.
format
(
arg_type
))
print
(
"""
\
/* Autogenerated stub for {id} */
{ret
} {cdecl
}({
c
args})
{ret
urn_type} {name
}({args
_str
})
{{
const int size = {total_size};
void*buffer;
const int size = {total_size};
void*buffer;
buffer = _api_call_start({id}, size);
/* TODO: Check if buffer is no NULL */
"""
.
format
(
id
=
api_id
,
ret
=
api_return
,
cdecl
=
api_decl
,
cargs
=
api_args
,
total_size
=
"
+
"
.
join
(
api_args_sizes
)
if
api_args_sizes
!=
[]
else
"
0
"
,
),
file
=
f_client
,
)
if
api_return
!=
"
void
"
:
print
(
"""
\
case {id}:
*(({ret}*)buffer) = {cdecl}(
"""
.
format
(
id
=
api_id
,
ret
=
api_return
,
cdecl
=
api_decl
),
file
=
f_server
,
)
buffer = _api_call_start({id}, size);
/* TODO: Check if buffer is not NULL */
"""
f_client
.
write
(
tmp
.
format
(
**
decl
))
for
i
,
arg
in
enumerate
(
decl
[
"
args
"
]):
arg
[
"
offset
"
]
=
sizeof
(
decl
[
"
args
"
][:
i
])
tmp
=
"""
\
*({type}*)(buffer + {offset}) = {name};
"""
f_client
.
write
(
tmp
.
format
(
**
arg
))
if
decl
[
"
return_type
"
]
==
"
void
"
:
# Don't return if return type is void
tmp
=
"""
\
_api_call_transact(buffer);
}}
"""
f_client
.
write
(
tmp
.
format
(
**
decl
))
else
:
print
(
"""
\
case {id}:
{cdecl}(
"""
.
format
(
id
=
api_id
,
ret
=
api_return
,
cdecl
=
api_decl
),
file
=
f_server
,
)
for
i
,
(
arg
,
ty
)
in
enumerate
(
zip
(
api_args_names
,
api_args_types
)):
print
(
"""
*({type}*)(buffer + {offset}) = {arg};
"""
.
format
(
type
=
ty
,
offset
=
"
+
"
.
join
(
api_args_sizes
[:
i
])
if
i
>
0
else
"
0
"
,
arg
=
arg
,
),
file
=
f_client
,
)
if
i
!=
0
:
print
(
"
,
"
,
file
=
f_server
)
print
(
"""
\
*({type}*)(buffer + {offset})
"""
.
format
(
type
=
ty
,
offset
=
"
+
"
.
join
(
api_args_sizes
[:
i
])
if
i
>
0
else
"
0
"
,
),
file
=
f_server
,
end
=
""
,
)
print
(
"""
);
break;
"""
.
format
(
cdecl
=
api_decl
,
args
=
"
,
"
.
join
(
api_args_names
),
),
file
=
f_server
,
)
if
api_return
!=
"
void
"
:
print
(
"""
return *({ret}*)_api_call_transact(buffer);
tmp
=
"""
\
return *({return_type}*)_api_call_transact(buffer);
}}
"""
.
format
(
id
=
api_id
,
ret
=
api_return
,
),
file
=
f_client
,
)
"""
f_client
.
write
(
tmp
.
format
(
**
decl
))
# END: Generate Client }}}
# Generate Dispatcher {{{
with
open
(
args
.
server
,
"
w
"
)
as
f_dispatcher
:
tmp
=
"""
\
#include <stdio.h>
#include
"
{header}
"
void __api_dispatch_call(uint32_t id, void*buffer)
{{
switch (id) {{
"""
f_dispatcher
.
write
(
tmp
.
format
(
**
fmt_header
))
for
decl
in
declarations
:
if
decl
[
"
return_type
"
]
==
"
void
"
:
tmp
=
"""
\
case {id}:
{name}(
"""
f_dispatcher
.
write
(
tmp
.
format
(
**
decl
))
else
:
print
(
"""
_api_call_transact(buffer);
tmp
=
"""
\
case {id}:
*(({return_type}*)buffer) = {name}(
"""
f_dispatcher
.
write
(
tmp
.
format
(
**
decl
))
for
i
,
arg
in
enumerate
(
decl
[
"
args
"
]):
arg
[
"
comma
"
]
=
""
if
i
==
0
else
"
,
"
arg
[
"
offset
"
]
=
sizeof
(
decl
[
"
args
"
][:
i
])
tmp
=
"""
{comma}
*({type}*)(buffer + {offset})
"""
f_dispatcher
.
write
(
tmp
.
format
(
**
arg
))
tmp
=
"""
);
break;
"""
f_dispatcher
.
write
(
tmp
.
format
(
**
decl
))
tmp
=
"""
\
default:
/* TODO: Better error handling */
printf(
"
Error: API function %x is unknown!!
\\
n
"
, id);
break;
}}
}}
"""
.
format
(
id
=
api_id
,
),
file
=
f_client
,
)
print
(
"""
\
default:
printf(
"
Error: API function %x is unknown!!
\\
n
"
, {id});
break;
}}
}}
"""
.
format
(
id
=
api_id
,
),
file
=
f_server
)
"""
f_dispatcher
.
write
(
tmp
.
format
(
**
fmt_header
))
# END: Generate Dispatcher }}}
if
__name__
==
"
__main__
"
:
...
...
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