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
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
|
#!/usr/bin/python
import sys
import re
import idl
def libxl_C_instance_of(ty, instancename):
if isinstance(ty, idl.Aggregate) and ty.typename is None:
if instancename is None:
return libxl_C_type_define(ty)
else:
return libxl_C_type_define(ty) + " " + instancename
s = ""
if isinstance(ty, idl.Array):
s += libxl_C_instance_of(ty.lenvar.type, ty.lenvar.name) + ";\n"
return s + ty.typename + " " + instancename
def libxl_C_type_define(ty, indent = ""):
s = ""
if isinstance(ty, idl.Enumeration):
if ty.typename is None:
s += "enum {\n"
else:
s += "typedef enum %s {\n" % ty.typename
for v in ty.values:
x = "%s = %d" % (v.name, v.value)
x = x.replace("\n", "\n ")
s += " " + x + ",\n"
if ty.typename is None:
s += "}"
else:
s += "} %s" % ty.typename
elif isinstance(ty, idl.Aggregate):
if isinstance(ty, idl.KeyedUnion):
s += libxl_C_instance_of(ty.keyvar.type, ty.keyvar.name) + ";\n"
if ty.typename is None:
s += "%s {\n" % ty.kind
else:
s += "typedef %s %s {\n" % (ty.kind, ty.typename)
for f in ty.fields:
x = libxl_C_instance_of(f.type, f.name)
if f.const:
x = "const " + x
x = x.replace("\n", "\n ")
s += " " + x + ";\n"
if ty.typename is None:
s += "}"
else:
s += "} %s" % ty.typename
else:
raise NotImplementedError("%s" % type(ty))
return s.replace("\n", "\n%s" % indent)
def libxl_C_type_dispose(ty, v, indent = " ", parent = None):
s = ""
if isinstance(ty, idl.KeyedUnion):
if parent is None:
raise Exception("KeyedUnion type must have a parent")
s += "switch (%s) {\n" % (parent + ty.keyvar.name)
for f in ty.fields:
(nparent,fexpr) = ty.member(v, f, parent is None)
s += "case %s:\n" % f.enumname
s += libxl_C_type_dispose(f.type, fexpr, indent + " ", nparent)
s += " break;\n"
s += "}\n"
elif isinstance(ty, idl.Array):
if parent is None:
raise Exception("Array type must have a parent")
if ty.elem_type.dispose_fn is not None:
s += "{\n"
s += " int i;\n"
s += " for (i=0; i<%s; i++)\n" % (parent + ty.lenvar.name)
s += libxl_C_type_dispose(ty.elem_type, v+"[i]",
indent + " ", parent)
if ty.dispose_fn is not None:
if ty.elem_type.dispose_fn is not None:
s += " "
s += "%s(%s);\n" % (ty.dispose_fn, ty.pass_arg(v, parent is None))
if ty.elem_type.dispose_fn is not None:
s += "}\n"
elif isinstance(ty, idl.Struct) and (parent is None or ty.dispose_fn is None):
for f in [f for f in ty.fields if not f.const]:
(nparent,fexpr) = ty.member(v, f, parent is None)
s += libxl_C_type_dispose(f.type, fexpr, "", nparent)
else:
if ty.dispose_fn is not None:
s += "%s(%s);\n" % (ty.dispose_fn, ty.pass_arg(v, parent is None))
if s != "":
s = indent + s
return s.replace("\n", "\n%s" % indent).rstrip(indent)
def libxl_init_members(ty, nesting = 0):
"""Returns a list of members of ty which require a separate init"""
if isinstance(ty, idl.Aggregate):
return [f for f in ty.fields if not f.const and isinstance(f.type,idl.KeyedUnion)]
else:
return []
def _libxl_C_type_init(ty, v, indent = " ", parent = None, subinit=False):
s = ""
if isinstance(ty, idl.KeyedUnion):
if parent is None:
raise Exception("KeyedUnion type must have a parent")
if subinit:
s += "switch (%s) {\n" % (parent + ty.keyvar.name)
for f in ty.fields:
(nparent,fexpr) = ty.member(v, f, parent is None)
s += "case %s:\n" % f.enumname
s += _libxl_C_type_init(f.type, fexpr, " ", nparent)
s += " break;\n"
s += "}\n"
else:
if ty.keyvar.init_val:
s += "%s = %s;\n" % (parent + ty.keyvar.name, ty.keyvar.init_val)
elif ty.keyvar.type.init_val:
s += "%s = %s;\n" % (parent + ty.keyvar.name, ty.keyvar.type.init_val)
elif isinstance(ty, idl.Struct) and (parent is None or ty.init_fn is None):
for f in [f for f in ty.fields if not f.const]:
(nparent,fexpr) = ty.member(v, f, parent is None)
if f.init_val is not None:
s += "%s = %s;\n" % (fexpr, f.init_val)
else:
s += _libxl_C_type_init(f.type, fexpr, "", nparent)
else:
if ty.init_val is not None:
s += "%s = %s;\n" % (ty.pass_arg(v, parent is None), ty.init_val)
elif ty.init_fn is not None:
s += "%s(%s);\n" % (ty.init_fn, ty.pass_arg(v, parent is None))
if s != "":
s = indent + s
return s.replace("\n", "\n%s" % indent).rstrip(indent)
def libxl_C_type_init(ty):
s = ""
s += "void %s(%s)\n" % (ty.init_fn, ty.make_arg("p", passby=idl.PASS_BY_REFERENCE))
s += "{\n"
s += " memset(p, '\\0', sizeof(*p));\n"
s += _libxl_C_type_init(ty, "p")
s += "}\n"
s += "\n"
return s
def libxl_C_type_member_init(ty, field):
if not isinstance(field.type, idl.KeyedUnion):
raise Exception("Only KeyedUnion is supported for member init")
ku = field.type
s = ""
s += "void %s(%s, %s)\n" % (ty.init_fn + "_" + ku.keyvar.name,
ty.make_arg("p", passby=idl.PASS_BY_REFERENCE),
ku.keyvar.type.make_arg(ku.keyvar.name))
s += "{\n"
if ku.keyvar.init_val is not None:
init_val = ku.keyvar.init_val
elif ku.keyvar.type.init_val is not None:
init_val = ku.keyvar.type.init_val
else:
init_val = None
(nparent,fexpr) = ty.member(ty.pass_arg("p"), ku.keyvar, isref=True)
if init_val is not None:
s += " assert(%s == %s);\n" % (fexpr, init_val)
else:
s += " assert(!%s);\n" % (fexpr)
s += " %s = %s;\n" % (fexpr, ku.keyvar.name)
(nparent,fexpr) = ty.member(ty.pass_arg("p"), field, isref=True)
s += _libxl_C_type_init(ku, fexpr, parent=nparent, subinit=True)
s += "}\n"
s += "\n"
return s
def libxl_C_type_gen_json(ty, v, indent = " ", parent = None):
s = ""
if parent is None:
s += "yajl_gen_status s;\n"
if isinstance(ty, idl.Array):
if parent is None:
raise Exception("Array type must have a parent")
s += "{\n"
s += " int i;\n"
s += " s = yajl_gen_array_open(hand);\n"
s += " if (s != yajl_gen_status_ok)\n"
s += " goto out;\n"
s += " for (i=0; i<%s; i++) {\n" % (parent + ty.lenvar.name)
s += libxl_C_type_gen_json(ty.elem_type, v+"[i]",
indent + " ", parent)
s += " }\n"
s += " s = yajl_gen_array_close(hand);\n"
s += " if (s != yajl_gen_status_ok)\n"
s += " goto out;\n"
s += "}\n"
elif isinstance(ty, idl.Enumeration):
s += "s = libxl__yajl_gen_enum(hand, %s_to_string(%s));\n" % (ty.typename, ty.pass_arg(v, parent is None))
s += "if (s != yajl_gen_status_ok)\n"
s += " goto out;\n"
elif isinstance(ty, idl.KeyedUnion):
if parent is None:
raise Exception("KeyedUnion type must have a parent")
s += "switch (%s) {\n" % (parent + ty.keyvar.name)
for f in ty.fields:
(nparent,fexpr) = ty.member(v, f, parent is None)
s += "case %s:\n" % f.enumname
s += libxl_C_type_gen_json(f.type, fexpr, indent + " ", nparent)
s += " break;\n"
s += "}\n"
elif isinstance(ty, idl.Struct) and (parent is None or ty.json_fn is None):
s += "s = yajl_gen_map_open(hand);\n"
s += "if (s != yajl_gen_status_ok)\n"
s += " goto out;\n"
for f in [f for f in ty.fields if not f.const]:
(nparent,fexpr) = ty.member(v, f, parent is None)
s += "s = yajl_gen_string(hand, (const unsigned char *)\"%s\", sizeof(\"%s\")-1);\n" % (f.name, f.name)
s += "if (s != yajl_gen_status_ok)\n"
s += " goto out;\n"
s += libxl_C_type_gen_json(f.type, fexpr, "", nparent)
s += "s = yajl_gen_map_close(hand);\n"
s += "if (s != yajl_gen_status_ok)\n"
s += " goto out;\n"
else:
if ty.json_fn is not None:
s += "s = %s(hand, %s);\n" % (ty.json_fn, ty.pass_arg(v, parent is None))
s += "if (s != yajl_gen_status_ok)\n"
s += " goto out;\n"
if parent is None:
s += "out:\n"
s += "return s;\n"
if s != "":
s = indent + s
return s.replace("\n", "\n%s" % indent).rstrip(indent)
def libxl_C_type_to_json(ty, v, indent = " "):
s = ""
gen = "(libxl__gen_json_callback)&%s_gen_json" % ty.typename
s += "return libxl__object_to_json(ctx, \"%s\", %s, (void *)%s);\n" % (ty.typename, gen, ty.pass_arg(v, passby=idl.PASS_BY_REFERENCE))
if s != "":
s = indent + s
return s.replace("\n", "\n%s" % indent).rstrip(indent)
def libxl_C_enum_to_string(ty, e, indent = " "):
s = ""
s += "switch(%s) {\n" % e
for v in ty.values:
s += " case %s:\n" % (v.name)
s += " return \"%s\";\n" % (v.valuename.lower())
s += " default:\n "
s += " return NULL;\n"
s += "}\n"
if s != "":
s = indent + s
return s.replace("\n", "\n%s" % indent).rstrip(indent)
def libxl_C_enum_strings(ty, indent=""):
s = ""
s += "libxl_enum_string_table %s_string_table[] = {\n" % (ty.typename)
for v in ty.values:
s += " { .s = \"%s\", .v = %s },\n" % (v.valuename.lower(), v.name)
s += " { NULL, -1 },\n"
s += "};\n"
s += "\n"
if s != "":
s = indent + s
return s.replace("\n", "\n%s" % indent).rstrip(indent)
def libxl_C_enum_from_string(ty, str, e, indent = " "):
s = ""
s += "return libxl__enum_from_string(%s_string_table,\n" % ty.typename
s += " %s, (int *)%s);\n" % (str, e)
if s != "":
s = indent + s
return s.replace("\n", "\n%s" % indent).rstrip(indent)
if __name__ == '__main__':
if len(sys.argv) != 5:
print >>sys.stderr, "Usage: gentypes.py <idl> <header> <header-json> <implementation>"
sys.exit(1)
(_, idlname, header, header_json, impl) = sys.argv
(builtins,types) = idl.parse(idlname)
print "outputting libxl type definitions to %s" % header
f = open(header, "w")
header_define = header.upper().replace('.','_')
f.write("""#ifndef %s
#define %s
/*
* DO NOT EDIT.
*
* This file is autogenerated by
* "%s"
*/
""" % (header_define, header_define, " ".join(sys.argv)))
for ty in types:
f.write(libxl_C_type_define(ty) + ";\n")
if ty.dispose_fn is not None:
f.write("%svoid %s(%s);\n" % (ty.hidden(), ty.dispose_fn, ty.make_arg("p")))
if ty.init_fn is not None:
f.write("%svoid %s(%s);\n" % (ty.hidden(), ty.init_fn, ty.make_arg("p")))
for field in libxl_init_members(ty):
if not isinstance(field.type, idl.KeyedUnion):
raise Exception("Only KeyedUnion is supported for member init")
ku = field.type
f.write("%svoid %s(%s, %s);\n" % (ty.hidden(), ty.init_fn + "_" + ku.keyvar.name,
ty.make_arg("p"),
ku.keyvar.type.make_arg(ku.keyvar.name)))
if ty.json_fn is not None:
f.write("%schar *%s_to_json(libxl_ctx *ctx, %s);\n" % (ty.hidden(), ty.typename, ty.make_arg("p")))
if isinstance(ty, idl.Enumeration):
f.write("%sconst char *%s_to_string(%s);\n" % (ty.hidden(), ty.typename, ty.make_arg("p")))
f.write("%sint %s_from_string(const char *s, %s);\n" % (ty.hidden(), ty.typename, ty.make_arg("e", passby=idl.PASS_BY_REFERENCE)))
f.write("%sextern libxl_enum_string_table %s_string_table[];\n" % (ty.hidden(), ty.typename))
f.write("\n")
f.write("""#endif /* %s */\n""" % (header_define))
f.close()
print "outputting libxl JSON definitions to %s" % header_json
f = open(header_json, "w")
header_json_define = header_json.upper().replace('.','_')
f.write("""#ifndef %s
#define %s
/*
* DO NOT EDIT.
*
* This file is autogenerated by
* "%s"
*/
""" % (header_json_define, header_json_define, " ".join(sys.argv)))
for ty in [ty for ty in types if ty.json_fn is not None]:
f.write("%syajl_gen_status %s_gen_json(yajl_gen hand, %s);\n" % (ty.hidden(), ty.typename, ty.make_arg("p", passby=idl.PASS_BY_REFERENCE)))
f.write("\n")
f.write("""#endif /* %s */\n""" % header_json_define)
f.close()
print "outputting libxl type implementations to %s" % impl
f = open(impl, "w")
f.write("""
/* DO NOT EDIT.
*
* This file is autogenerated by
* "%s"
*/
#include "libxl_osdeps.h"
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "libxl_internal.h"
#define LIBXL_DTOR_POISON 0xa5
""" % " ".join(sys.argv))
for ty in [t for t in types if t.dispose_fn is not None and t.autogenerate_dispose_fn]:
f.write("void %s(%s)\n" % (ty.dispose_fn, ty.make_arg("p")))
f.write("{\n")
f.write(libxl_C_type_dispose(ty, "p"))
f.write(" memset(p, LIBXL_DTOR_POISON, sizeof(*p));\n")
f.write("}\n")
f.write("\n")
for ty in [t for t in types if t.init_fn is not None and t.autogenerate_init_fn]:
f.write(libxl_C_type_init(ty))
for field in libxl_init_members(ty):
f.write(libxl_C_type_member_init(ty, field))
for ty in [t for t in types if isinstance(t,idl.Enumeration)]:
f.write("const char *%s_to_string(%s e)\n" % (ty.typename, ty.typename))
f.write("{\n")
f.write(libxl_C_enum_to_string(ty, "e"))
f.write("}\n")
f.write("\n")
f.write(libxl_C_enum_strings(ty))
f.write("int %s_from_string(const char *s, %s *e)\n" % (ty.typename, ty.typename))
f.write("{\n")
f.write(libxl_C_enum_from_string(ty, "s", "e"))
f.write("}\n")
f.write("\n")
for ty in [t for t in types if t.json_fn is not None]:
f.write("yajl_gen_status %s_gen_json(yajl_gen hand, %s)\n" % (ty.typename, ty.make_arg("p", passby=idl.PASS_BY_REFERENCE)))
f.write("{\n")
f.write(libxl_C_type_gen_json(ty, "p"))
f.write("}\n")
f.write("\n")
f.write("char *%s_to_json(libxl_ctx *ctx, %s)\n" % (ty.typename, ty.make_arg("p")))
f.write("{\n")
f.write(libxl_C_type_to_json(ty, "p"))
f.write("}\n")
f.write("\n")
f.close()
|
