blob: a893b3a89bc470d06856ab3424c0efac0446e648 [file] [log] [blame]
# C generation
import datetime
import os
import time
import sys
from io import StringIO
import shutil
datestring = datetime.datetime.utcfromtimestamp(
int(os.environ.get('SOURCE_DATE_EPOCH', time.time())))
input_filename = 'inputfil'
top_boilerplate = '''\
/*
* VLIB API definitions {datestring}
* Input file: {input_filename}
* Automatically generated: please edit the input file NOT this file!
*/
#include <stdbool.h>
#if defined(vl_msg_id)||defined(vl_union_id) \\
|| defined(vl_printfun) ||defined(vl_endianfun) \\
|| defined(vl_api_version)||defined(vl_typedefs) \\
|| defined(vl_msg_name)||defined(vl_msg_name_crc_list) \\
|| defined(vl_api_version_tuple)
/* ok, something was selected */
#else
#warning no content included from {input_filename}
#endif
#define VL_API_PACKED(x) x __attribute__ ((packed))
'''
bottom_boilerplate = '''\
/****** API CRC (whole file) *****/
#ifdef vl_api_version
vl_api_version({input_filename}, {file_crc:#08x})
#endif
'''
def msg_ids(s):
output = '''\
/****** Message ID / handler enum ******/
#ifdef vl_msg_id
'''
for t in s['Define']:
output += "vl_msg_id(VL_API_%s, vl_api_%s_t_handler)\n" % \
(t.name.upper(), t.name)
output += "#endif"
return output
def msg_names(s):
output = '''\
/****** Message names ******/
#ifdef vl_msg_name
'''
for t in s['Define']:
dont_trace = 0 if t.dont_trace else 1
output += "vl_msg_name(vl_api_%s_t, %d)\n" % (t.name, dont_trace)
output += "#endif"
return output
def msg_name_crc_list(s, suffix):
output = '''\
/****** Message name, crc list ******/
#ifdef vl_msg_name_crc_list
'''
output += "#define foreach_vl_msg_name_crc_%s " % suffix
for t in s['Define']:
output += "\\\n_(VL_API_%s, %s, %08x) " % \
(t.name.upper(), t.name, t.crc)
output += "\n#endif"
return output
def api2c(fieldtype):
mappingtable = {'string': 'vl_api_string_t', }
if fieldtype in mappingtable:
return mappingtable[fieldtype]
return fieldtype
def typedefs(filename):
output = '''\
/****** Typedefs ******/
#ifdef vl_typedefs
#include "{include}.api_types.h"
#endif
'''.format(include=filename)
return output
format_strings = {'u8': '%u',
'bool': '%u',
'i8': '%d',
'u16': '%u',
'i16': '%d',
'u32': '%u',
'i32': '%ld',
'u64': '%llu',
'i64': '%lld',
'f64': '%.2f'}
noprint_fields = {'_vl_msg_id': None,
'client_index': None,
'context': None}
class Printfun():
_dispatch = {}
def __init__(self, stream):
self.stream = stream
def print_string(self, o, stream):
write = stream.write
if o.modern_vla:
write(' if (vl_api_string_len(&a->{f}) > 0) {{\n'
.format(f=o.fieldname))
write(' s = format(s, "\\n%U{f}: %.*s", '
'format_white_space, indent, '
'vl_api_string_len(&a->{f}) - 1, '
'vl_api_from_api_string(&a->{f}));\n'.format(f=o.fieldname))
write(' } else {\n')
write(' s = format(s, "\\n%U{f}:", '
'format_white_space, indent);\n'.format(f=o.fieldname))
write(' }\n')
else:
write(' s = format(s, "\\n%U{f}: %s", '
'format_white_space, indent, a->{f});\n'
.format(f=o.fieldname))
def print_field(self, o, stream):
write = stream.write
if o.fieldname in noprint_fields:
return
if o.fieldtype in format_strings:
f = format_strings[o.fieldtype]
write(' s = format(s, "\\n%U{n}: {f}", '
'format_white_space, indent, a->{n});\n'
.format(n=o.fieldname, f=f))
else:
write(' s = format(s, "\\n%U{n}: %U", '
'format_white_space, indent, '
'format_{t}, &a->{n}, indent);\n'
.format(n=o.fieldname, t=o.fieldtype))
_dispatch['Field'] = print_field
def print_array(self, o, stream):
write = stream.write
forloop = '''\
for (i = 0; i < {lfield}; i++) {{
s = format(s, "\\n%U{n}: %U",
format_white_space, indent, format_{t}, &a->{n}[i], indent);
}}
'''
forloop_format = '''\
for (i = 0; i < {lfield}; i++) {{
s = format(s, "\\n%U{n}: {t}",
format_white_space, indent, a->{n}[i]);
}}
'''
if o.fieldtype == 'string':
return self.print_string(o, stream)
if o.fieldtype == 'u8':
if o.lengthfield:
write(' s = format(s, "\\n%U{n}: %U", format_white_space, '
'indent, format_hex_bytes, a->{n}, a->{lfield});\n'
.format(n=o.fieldname, lfield=o.lengthfield))
else:
write(' s = format(s, "\\n%U{n}: %U", format_white_space, '
'indent, format_hex_bytes, a, {lfield});\n'
.format(n=o.fieldname, lfield=o.length))
return
lfield = 'a->' + o.lengthfield if o.lengthfield else o.length
if o.fieldtype in format_strings:
write(forloop_format.format(lfield=lfield,
t=format_strings[o.fieldtype],
n=o.fieldname))
else:
write(forloop.format(lfield=lfield, t=o.fieldtype, n=o.fieldname))
_dispatch['Array'] = print_array
def print_alias(self, k, v, stream):
write = stream.write
if ('length' in v.alias and v.alias['length'] and
v.alias['type'] == 'u8'):
write(' return format(s, "%U", format_hex_bytes, a, {});\n'
.format(v.alias['length']))
elif v.alias['type'] in format_strings:
write(' return format(s, "{}", *a);\n'
.format(format_strings[v.alias['type']]))
else:
write(' return format(s, "{} (print not implemented)");\n'
.format(k))
def print_enum(self, o, stream):
write = stream.write
write(" switch(*a) {\n")
for b in o:
write(" case %s:\n" % b[1])
write(' return format(s, "{}");\n'.format(b[0]))
write(' }\n')
_dispatch['Enum'] = print_enum
def print_obj(self, o, stream):
write = stream.write
if o.type in self._dispatch:
self._dispatch[o.type](self, o, stream)
else:
write(' s = format(s, "\\n{} {} {} (print not implemented");\n'
.format(o.type, o.fieldtype, o.fieldname))
def printfun(objs, stream, modulename):
write = stream.write
h = '''\
/****** Print functions *****/
#ifdef vl_printfun
#ifndef included_{module}_printfun
#define included_{module}_printfun
#ifdef LP64
#define _uword_fmt \"%lld\"
#define _uword_cast (long long)
#else
#define _uword_fmt \"%ld\"
#define _uword_cast long
#endif
'''
signature = '''\
static inline void *vl_api_{name}_t_print (vl_api_{name}_t *a, void *handle)
{{
u8 *s = 0;
u32 indent __attribute__((unused)) = 2;
int i __attribute__((unused));
'''
h = h.format(module=modulename)
write(h)
pp = Printfun(stream)
for t in objs:
if t.manual_print:
write("/***** manual: vl_api_%s_t_print *****/\n\n" % t.name)
continue
write(signature.format(name=t.name))
write(' /* Message definition: vl_api_{}_t: */\n'.format(t.name))
write(" s = format(s, \"vl_api_%s_t:\");\n" % t.name)
for o in t.block:
pp.print_obj(o, stream)
write(' vec_add1(s, 0);\n')
write(' vl_print (handle, (char *)s);\n')
write(' vec_free (s);\n')
write(' return handle;\n')
write('}\n\n')
write("\n#endif")
write("\n#endif /* vl_printfun */\n")
return ''
def printfun_types(objs, stream, modulename):
write = stream.write
pp = Printfun(stream)
h = '''\
/****** Print functions *****/
#ifdef vl_printfun
#ifndef included_{module}_printfun_types
#define included_{module}_printfun_types
'''
h = h.format(module=modulename)
write(h)
signature = '''\
static inline u8 *format_vl_api_{name}_t (u8 *s, va_list * args)
{{
vl_api_{name}_t *a = va_arg (*args, vl_api_{name}_t *);
u32 indent __attribute__((unused)) = va_arg (*args, u32);
int i __attribute__((unused));
indent += 2;
'''
for t in objs:
if t.__class__.__name__ == 'Enum':
write(signature.format(name=t.name))
pp.print_enum(t.block, stream)
write(' return s;\n')
write('}\n\n')
continue
if t.manual_print:
write("/***** manual: vl_api_%s_t_print *****/\n\n" % t.name)
continue
if t.__class__.__name__ == 'Using':
write(signature.format(name=t.name))
pp.print_alias(t.name, t, stream)
write('}\n\n')
continue
write(signature.format(name=t.name))
for o in t.block:
pp.print_obj(o, stream)
write(' return s;\n')
write('}\n\n')
write("\n#endif")
write("\n#endif /* vl_printfun_types */\n")
def imports(imports):
output = '/* Imported API files */\n'
output += '#ifndef vl_api_version\n'
for i in imports:
s = i.filename.replace('plugins/', '')
output += '#include <{}.h>\n'.format(s)
output += '#endif\n'
return output
endian_strings = {
'u16': 'clib_net_to_host_u16',
'u32': 'clib_net_to_host_u32',
'u64': 'clib_net_to_host_u64',
'i16': 'clib_net_to_host_i16',
'i32': 'clib_net_to_host_i32',
'i64': 'clib_net_to_host_i64',
'f64': 'clib_net_to_host_f64',
}
def endianfun_array(o):
forloop = '''\
for (i = 0; i < {length}; i++) {{
a->{name}[i] = {format}(a->{name}[i]);
}}
'''
forloop_format = '''\
for (i = 0; i < {length}; i++) {{
{type}_endian(&a->{name}[i]);
}}
'''
output = ''
if o.fieldtype == 'u8' or o.fieldtype == 'string':
output += ' /* a->{n} = a->{n} (no-op) */\n'.format(n=o.fieldname)
else:
lfield = 'a->' + o.lengthfield if o.lengthfield else o.length
if o.fieldtype in endian_strings:
output += (forloop
.format(length=lfield,
format=endian_strings[o.fieldtype],
name=o.fieldname))
else:
output += (forloop_format
.format(length=lfield, type=o.fieldtype,
name=o.fieldname))
return output
def endianfun_obj(o):
output = ''
if o.type == 'Array':
return endianfun_array(o)
elif o.type != 'Field':
output += (' s = format(s, "\\n{} {} {} (print not implemented");\n'
.format(o.type, o.fieldtype, o.fieldname))
return output
if o.fieldtype in endian_strings:
output += (' a->{name} = {format}(a->{name});\n'
.format(name=o.fieldname,
format=endian_strings[o.fieldtype]))
elif o.fieldtype.startswith('vl_api_'):
output += (' {type}_endian(&a->{name});\n'
.format(type=o.fieldtype, name=o.fieldname))
else:
output += ' /* a->{n} = a->{n} (no-op) */\n'.format(n=o.fieldname)
return output
def endianfun(objs, modulename):
output = '''\
/****** Endian swap functions *****/\n\
#ifdef vl_endianfun
#ifndef included_{module}_endianfun
#define included_{module}_endianfun
#undef clib_net_to_host_uword
#ifdef LP64
#define clib_net_to_host_uword clib_net_to_host_u64
#else
#define clib_net_to_host_uword clib_net_to_host_u32
#endif
'''
output = output.format(module=modulename)
signature = '''\
static inline void vl_api_{name}_t_endian (vl_api_{name}_t *a)
{{
int i __attribute__((unused));
'''
for t in objs:
if t.__class__.__name__ == 'Enum':
output += signature.format(name=t.name)
if t.enumtype in endian_strings:
output += (' *a = {}(*a);\n'
.format(endian_strings[t.enumtype]))
else:
output += (' /* a->{name} = a->{name} (no-op) */\n'
.format(name=t.name))
output += '}\n\n'
continue
if t.manual_endian:
output += "/***** manual: vl_api_%s_t_endian *****/\n\n" % t.name
continue
if t.__class__.__name__ == 'Using':
output += signature.format(name=t.name)
if ('length' in t.alias and t.alias['length'] and
t.alias['type'] == 'u8'):
output += (' /* a->{name} = a->{name} (no-op) */\n'
.format(name=t.name))
elif t.alias['type'] in format_strings:
output += (' *a = {}(*a);\n'
.format(endian_strings[t.alias['type']]))
else:
output += ' /* Not Implemented yet {} */'.format(t.name)
output += '}\n\n'
continue
output += signature.format(name=t.name)
for o in t.block:
output += endianfun_obj(o)
output += '}\n\n'
output += "\n#endif"
output += "\n#endif /* vl_endianfun */\n\n"
return output
def version_tuple(s, module):
output = '''\
/****** Version tuple *****/
#ifdef vl_api_version_tuple
'''
if 'version' in s['Option']:
v = s['Option']['version']
(major, minor, patch) = v.split('.')
output += "vl_api_version_tuple(%s, %s, %s, %s)\n" % \
(module, major, minor, patch)
output += "\n#endif /* vl_api_version_tuple */\n\n"
return output
def generate_include_enum(s, module, stream):
write = stream.write
if len(s['Define']):
write('typedef enum {\n')
for t in s['Define']:
write(' VL_API_{},\n'.format(t.name.upper()))
write(' VL_MSG_FIRST_AVAILABLE\n')
write('}} vl_api_{}_enum_t;\n'.format(module))
#
# Generate separate API _types file.
#
def generate_include_types(s, module, stream):
write = stream.write
write('#ifndef included_{module}_api_types_h\n'.format(module=module))
write('#define included_{module}_api_types_h\n'.format(module=module))
if len(s['Import']):
write('/* Imported API files */\n')
for i in s['Import']:
filename = i.filename.replace('plugins/', '')
write('#include <{}_types.h>\n'.format(filename))
for o in s['types'] + s['Define']:
tname = o.__class__.__name__
if tname == 'Using':
if 'length' in o.alias:
write('typedef %s vl_api_%s_t[%s];\n' % (o.alias['type'], o.name, o.alias['length']))
else:
write('typedef %s vl_api_%s_t;\n' % (o.alias['type'], o.name))
elif tname == 'Enum':
if o.enumtype == 'u32':
write("typedef enum {\n")
else:
write("typedef enum __attribute__((packed)) {\n")
for b in o.block:
write(" %s = %s,\n" % (b[0], b[1]))
write('} vl_api_%s_t;\n' % o.name)
if o.enumtype != 'u32':
size1 = 'sizeof(vl_api_%s_t)' % o.name
size2 = 'sizeof(%s)' % o.enumtype
err_str = 'size of API enum %s is wrong' % o.name
write('STATIC_ASSERT(%s == %s, "%s");\n'
% (size1, size2, err_str))
else:
if tname == 'Union':
write("typedef union __attribute__ ((packed)) _vl_api_%s {\n" % o.name)
else:
write(("typedef struct __attribute__ ((packed)) _vl_api_%s {\n")
% o.name)
for b in o.block:
if b.type == 'Option':
continue
if b.type == 'Field':
write(" %s %s;\n" % (api2c(b.fieldtype),
b.fieldname))
elif b.type == 'Array':
if b.lengthfield:
write(" %s %s[0];\n" % (api2c(b.fieldtype),
b.fieldname))
else:
# Fixed length strings decay to nul terminated u8
if b.fieldtype == 'string':
if b.modern_vla:
write(' {} {};\n'
.format(api2c(b.fieldtype),
b.fieldname))
else:
write(' u8 {}[{}];\n'
.format(b.fieldname, b.length))
else:
write(" %s %s[%s];\n" %
(api2c(b.fieldtype), b.fieldname,
b.length))
else:
raise ValueError("Error in processing type {} for {}"
.format(b, o.name))
write('} vl_api_%s_t;\n' % o.name)
for t in s['Define']:
write('#define VL_API_{ID}_CRC "{n}_{crc:08x}"\n'
.format(n=t.name, ID=t.name.upper(), crc=t.crc))
write("\n#endif\n")
def generate_c_boilerplate(services, defines, file_crc, module, stream):
write = stream.write
hdr = '''\
#define vl_endianfun /* define message structures */
#include "{module}.api.h"
#undef vl_endianfun
/* instantiate all the print functions we know about */
#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
#define vl_printfun
#include "{module}.api.h"
#undef vl_printfun
'''
write(hdr.format(module=module))
write('static u16\n')
write('setup_message_id_table (void) {\n')
write(' api_main_t *am = my_api_main;\n')
write(' u16 msg_id_base = vl_msg_api_get_msg_ids ("{}_{crc:08x}", VL_MSG_FIRST_AVAILABLE);\n'
.format(module, crc=file_crc))
for d in defines:
write(' vl_msg_api_add_msg_name_crc (am, "{n}_{crc:08x}",\n'
' VL_API_{ID} + msg_id_base);\n'
.format(n=d.name, ID=d.name.upper(), crc=d.crc))
for s in services:
write(' vl_msg_api_set_handlers(VL_API_{ID} + msg_id_base, "{n}",\n'
' vl_api_{n}_t_handler, vl_noop_handler,\n'
' vl_api_{n}_t_endian, vl_api_{n}_t_print,\n'
' sizeof(vl_api_{n}_t), 1);\n'
.format(n=s.caller, ID=s.caller.upper()))
write(' return msg_id_base;\n')
write('}\n')
def generate_c_test_plugin_boilerplate(services, defines, file_crc, module, stream):
write = stream.write
define_hash = {d.name:d for d in defines}
replies = {}
hdr = '''\
#define vl_endianfun /* define message structures */
#include "{module}.api.h"
#undef vl_endianfun
/* instantiate all the print functions we know about */
#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
#define vl_printfun
#include "{module}.api.h"
#undef vl_printfun
'''
write(hdr.format(module=module))
for s in services:
try:
d = define_hash[s.reply]
except:
continue
if d.manual_print:
write('/* Manual definition requested for: vl_api_{n}_t_handler() */\n'
.format(n=s.reply))
continue
if not define_hash[s.caller].autoreply:
write('/* Only autoreply is supported (vl_api_{n}_t_handler()) */\n'
.format(n=s.reply))
continue
write('#ifndef VL_API_{n}_T_HANDLER\n'.format(n=s.reply.upper()))
write('static void\n')
write('vl_api_{n}_t_handler (vl_api_{n}_t * mp) {{\n'.format(n=s.reply))
write(' vat_main_t * vam = {}_test_main.vat_main;\n'.format(module))
write(' i32 retval = ntohl(mp->retval);\n')
write(' if (vam->async_mode) {\n')
write(' vam->async_errors += (retval < 0);\n')
write(' } else {\n')
write(' vam->retval = retval;\n')
write(' vam->result_ready = 1;\n')
write(' }\n')
write('}\n')
write('#endif\n')
for e in s.events:
if define_hash[e].manual_print:
continue
write('static void\n')
write('vl_api_{n}_t_handler (vl_api_{n}_t * mp) {{\n'.format(n=e))
write(' vl_print(0, "{n} event called:");\n'.format(n=e))
write(' vl_api_{n}_t_print(mp, 0);\n'.format(n=e))
write('}\n')
write('static void\n')
write('setup_message_id_table (vat_main_t * vam, u16 msg_id_base) {\n')
for s in services:
write(' vl_msg_api_set_handlers(VL_API_{ID} + msg_id_base, "{n}",\n'
' vl_api_{n}_t_handler, vl_noop_handler,\n'
' vl_api_{n}_t_endian, vl_api_{n}_t_print,\n'
' sizeof(vl_api_{n}_t), 1);\n'
.format(n=s.reply, ID=s.reply.upper()))
write(' hash_set_mem (vam->function_by_name, "{n}", api_{n});\n'.format(n=s.caller))
try:
write(' hash_set_mem (vam->help_by_name, "{n}", "{help}");\n'
.format(n=s.caller, help=define_hash[s.caller].options['vat_help']))
except:
pass
# Events
for e in s.events:
write(' vl_msg_api_set_handlers(VL_API_{ID} + msg_id_base, "{n}",\n'
' vl_api_{n}_t_handler, vl_noop_handler,\n'
' vl_api_{n}_t_endian, vl_api_{n}_t_print,\n'
' sizeof(vl_api_{n}_t), 1);\n'
.format(n=e, ID=e.upper()))
write('}\n')
write('clib_error_t * vat_plugin_register (vat_main_t *vam)\n')
write('{\n')
write(' {n}_test_main_t * mainp = &{n}_test_main;\n'.format(n=module))
write(' mainp->vat_main = vam;\n')
write(' mainp->msg_id_base = vl_client_get_first_plugin_msg_id ("{n}_{crc:08x}");\n'
.format(n=module, crc=file_crc))
write(' if (mainp->msg_id_base == (u16) ~0)\n')
write(' return clib_error_return (0, "{} plugin not loaded...");\n'.format(module))
write(' setup_message_id_table (vam, mainp->msg_id_base);\n')
write('#ifdef VL_API_LOCAL_SETUP_MESSAGE_ID_TABLE\n')
write(' VL_API_LOCAL_SETUP_MESSAGE_ID_TABLE(vam);\n')
write('#endif\n')
write(' return 0;\n')
write('}\n')
#
# Plugin entry point
#
def run(args, input_filename, s):
stream = StringIO()
if not args.outputdir:
sys.stderr.write('Missing --outputdir argument')
return None
basename = os.path.basename(input_filename)
filename, file_extension = os.path.splitext(basename)
modulename = filename.replace('.', '_')
filename_enum = os.path.join(args.outputdir + '/' + basename + '_enum.h')
filename_types = os.path.join(args.outputdir + '/' + basename + '_types.h')
filename_c = os.path.join(args.outputdir + '/' + basename + '.c')
filename_c_test = os.path.join(args.outputdir + '/' + basename + '_test.c')
# Generate separate types file
st = StringIO()
generate_include_types(s, modulename, st)
with open (filename_types, 'w') as fd:
st.seek (0)
shutil.copyfileobj (st, fd)
st.close()
# Generate separate enum file
st = StringIO()
generate_include_enum(s, modulename, st)
with open (filename_enum, 'w') as fd:
st.seek (0)
shutil.copyfileobj (st, fd)
st.close()
# Generate separate C file
st = StringIO()
generate_c_boilerplate(s['Service'], s['Define'], s['file_crc'],
modulename, st)
with open (filename_c, 'w') as fd:
st.seek (0)
shutil.copyfileobj(st, fd)
st.close()
# Generate separate C test file
# This is only supported for plugins at the moment
st = StringIO()
generate_c_test_plugin_boilerplate(s['Service'], s['Define'], s['file_crc'],
modulename, st)
with open (filename_c_test, 'w') as fd:
st.seek (0)
shutil.copyfileobj(st, fd)
st.close()
output = top_boilerplate.format(datestring=datestring,
input_filename=basename)
output += imports(s['Import'])
output += msg_ids(s)
output += msg_names(s)
output += msg_name_crc_list(s, filename)
output += typedefs(modulename)
printfun_types(s['types'], stream, modulename)
printfun(s['Define'], stream, modulename)
output += stream.getvalue()
stream.close()
output += endianfun(s['types'] + s['Define'], modulename)
output += version_tuple(s, basename)
output += bottom_boilerplate.format(input_filename=basename,
file_crc=s['file_crc'])
return output