File: unparse_hrule.ml

package info (click to toggle)
coccinelle 1.0.8.deb-5
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, sid
  • size: 26,148 kB
  • sloc: ml: 136,392; ansic: 23,594; sh: 2,189; makefile: 2,157; perl: 1,576; lisp: 840; python: 823; awk: 70; csh: 12
file content (561 lines) | stat: -rw-r--r-- 20,899 bytes parent folder | download
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
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
(*
 * Copyright (C) 2010, University of Copenhagen DIKU and INRIA.
 * Copyright (C) 2006, 2007 Julia Lawall
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License (GPL)
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * file license.txt for more details.
 *
 * This file was part of Coccinelle.
 *)

module Ast = Ast_cocci
module V = Visitor_ast

let error x s =
  failwith
    (Printf.sprintf "unparse_hrule: line: %d, %s" (Ast.get_line x) s)

let names = ref ([] : (string * int ref) list)

let started_files = ref ([] : (string * bool) list)
let typedefs = ref ([] : (string * string list ref) list)
let current_outfile = ref ""

let prefix = "_cocci_"

(* ----------------------------------------------------------------------- *)
(* Create rule to check for header include *)

let print_header_rule pr srcfile =
  match Str.split (Str.regexp "/") srcfile with
    [x] ->
      pr "@header@\n@@\n\n#include \"";
      pr x; pr "\"\n\n"; true
  | l ->
      let rec loop = function
	  [] -> false
	| [x] ->
	    pr "@header@\n@@\n\n#include \"";
	    pr x; pr "\"\n\n"; true
	| "include"::(x::xs) ->
	    pr "@header@\n@@\n\n#include <";
	    let x =
	      if Str.string_match (Str.regexp "asm-") x 0 then "asm" else x in
	    pr (String.concat "/" (x::xs));
	    pr ">\n\n"; true
	| x::xs -> loop xs in
      loop l

(* ----------------------------------------------------------------------- *)
(* Print check that we are not in the defining function *)

let print_check_rule pr function_name function_name_count header_req =
  (if header_req
  then pr (Printf.sprintf "@same_%s depends on header@\n" function_name_count)
  else pr (Printf.sprintf "@same_%s@\n" function_name_count));
  pr "position p;\n";
  pr "@@\n\n";
  pr function_name; pr "@p(...) { ... }\n\n"

(* ----------------------------------------------------------------------- *)
(* get parameters of the matched function *)

let rec env_lookup fn = function
    [] -> failwith "no binding"
  | (nm,vl)::rest when fn nm -> vl
  | _::rest -> env_lookup fn rest

let get_paramst env =
  let argname = ref ("","") in
  let fn ((_,nm) as name) =
    if nm = "ARGS"
    then (argname := name; true)
    else false in
  match env_lookup fn env with
    Ast_c.MetaParamListVal(paramst) -> (paramst,!argname)
  | _ -> failwith "not possible"

let get_function_name rule env =
  let donothing r k e = k e in
  let option_default = [] in
  let bind = Common.union_set in
  let do_any_list_list r any_list_list =
    List.fold_left
      (List.fold_left
	 (function prev -> function cur ->
	   bind (r.V.combiner_anything cur) prev))
      [] any_list_list in
  let mcode r mc =
    match Ast.get_mcodekind mc with
      Ast.MINUS(_,_,_,any_list_list) ->
	(match any_list_list with
	  Ast.NOREPLACEMENT -> []
	| Ast.REPLACEMENT(any_list_list,_) ->
	    do_any_list_list r any_list_list)
    | Ast.CONTEXT(_,any_befaft) ->
	(match any_befaft with
	  Ast.BEFORE(any_list_list,_) | Ast.AFTER(any_list_list,_) ->
	    do_any_list_list r any_list_list
	| Ast.BEFOREAFTER(ba,aa,_) ->
	    bind (do_any_list_list r ba) (do_any_list_list r aa)
	| Ast.NOTHING -> [])
    | Ast.PLUS _ -> [] in
  let expression r k e =
    bind (k e)
    (match Ast.unwrap e with
      Ast.FunCall(fn,lp,args,rp) ->
	(match Ast.unwrap args with
	  [e] ->
	    (match Ast.unwrap e with
	      Ast.MetaExprList(nm,_,_,_,_) ->
		(match (Ast.unwrap_mcode nm,Ast.get_mcodekind nm) with
		  ((_,"ARGS"), Ast.PLUS _) ->
		    (match Ast.unwrap fn with
		      Ast.Ident(id) ->
			(match Ast.unwrap id with
			  Ast.MetaId(nm,_,_,_)
			| Ast.MetaFunc(nm,_,_,_)
			| Ast.MetaLocalFunc(nm,_,_,_) ->
			    [Ast.unwrap_mcode nm]
			| _ -> [])
		    | _ -> [])
		| _ -> [])
	    | _ -> [])
	| _ -> [])
    | _ -> []) in
  let names =
    (V.combiner bind option_default
      mcode mcode mcode mcode mcode mcode mcode mcode mcode
      mcode mcode mcode mcode mcode
      donothing donothing donothing donothing donothing donothing
      donothing expression donothing donothing donothing donothing donothing
      donothing donothing donothing donothing donothing donothing donothing
      donothing
      donothing donothing donothing donothing donothing).V.combiner_top_level
      rule in
  match names with
    [name] ->
      (match env_lookup (function nm -> nm = name) env with
	Ast_c.MetaIdVal(s) | Ast_c.MetaFuncVal(s)
      | Ast_c.MetaLocalFuncVal(s) -> s
      |	_ -> error rule "not possible")
  | _ -> error rule "inconsistent rule generation"

(* ----------------------------------------------------------------------- *)
(* Print metavariable declarations *)

let rec print_typedef pr = function
    (Ast_c.TypeName(name,_),_) ->
      let s = Ast_c.str_of_name name in
      let typedefs =
	try List.assoc !current_outfile !typedefs
	with Not_found ->
	  let td = ref [] in
	  typedefs := (!current_outfile,td)::!typedefs;
	  td in
      if not (List.mem s !typedefs)
      then (typedefs := s::!typedefs; pr "typedef "; pr s; pr ";\n")
  | (Ast_c.Pointer(_,ty),_) -> print_typedef pr ty
  | _ -> ()

let rewrap_str s ii =
  {ii with Ast_c.pinfo =
    (match ii.Ast_c.pinfo with
      Ast_c.OriginTok pi ->
	Ast_c.OriginTok { pi with Common.str = s;}
    | Ast_c.ExpandedTok (pi,vpi) ->
	Ast_c.ExpandedTok ({ pi with Common.str = s;},vpi)
    | Ast_c.FakeTok (_,vpi) -> Ast_c.FakeTok (s,vpi)
    | Ast_c.AbstractLineTok pi ->
	Ast_c.AbstractLineTok { pi with Common.str = s;})}

let rewrap_prefix_name prefix name =
  match name with
  | Ast_c.RegularName (s, iiname) ->
      let iis = Common.tuple_of_list1 iiname in
      let iis' = rewrap_str (prefix^s) iis in
      Ast_c.RegularName (prefix ^ s, [iis'])
  | Ast_c.CppConcatenatedName _ | Ast_c.CppVariadicName _
  | Ast_c.CppIdentBuilder _
      -> raise Common.Todo


let print_metavar pr = function
  | {Ast_c.p_namei = Some name;
     p_type = (_,(Ast_c.Pointer(_,(Ast_c.BaseType(Ast_c.Void),_)),_));
    }
    ->
      let param = Ast_c.str_of_name name in
      pr ("expression "^prefix); pr param
  | ({Ast_c.p_namei = Some name; p_type = (_,ty)} : Ast_c.parameterType) ->

      let name' = rewrap_prefix_name prefix name in

      print_typedef pr ty;

      Pretty_print_c.pp_param_gen
	(function x ->
	  let str = Ast_c.str_of_info x in
	  if not (List.mem str ["const";"volatile"])
	  then pr str)
	(function _ -> pr " ")
        {Ast_c.p_register = (false,[]);
         p_namei = Some name';
         p_type = (({Ast_c.const = false; Ast_c.volatile = false},[]),ty)
        }
  | _ -> failwith "function must have named parameters"

let make_exp = function
    ({Ast_c.p_namei = Some name; p_type = ty}, comma_ii) ->
      let no_info = (None,Ast_c.NotTest) in

      let name' = rewrap_prefix_name prefix name in

      let exp =
	((Ast_c.Ident (name'),ref no_info),Ast_c.noii) in
      (name,(Common.Left exp,comma_ii))
  | _ -> failwith "bad parameter"

let print_extra_typedefs pr env =
  let bigf =
    { Visitor_c.default_visitor_c with
      Visitor_c.ktype = (fun (k, bigf) ty ->
	match ty with
	  (_,((Ast_c.TypeName(_,_),_) as ty)) -> print_typedef pr ty
	| _ -> k ty) } in
  List.iter
    (function (_,vl) ->
      match vl with
	Ast_c.MetaIdVal(_) | Ast_c.MetaFuncVal(_)
      | Ast_c.MetaAssignOpVal(_) | Ast_c.MetaBinaryOpVal(_)
      | Ast_c.MetaLocalFuncVal(_) -> ()
      | Ast_c.MetaExprVal(exp,_,_) -> Visitor_c.vk_expr bigf exp
      | Ast_c.MetaExprListVal(args) -> Visitor_c.vk_argument_list bigf args
      | Ast_c.MetaParamVal(param) -> Visitor_c.vk_param bigf param
      | Ast_c.MetaParamListVal(params) -> Visitor_c.vk_param_list bigf params
      | Ast_c.MetaDParamListVal(params) ->
	  Visitor_c.vk_define_params bigf params

      | Ast_c.MetaTypeVal(ty) -> Visitor_c.vk_type bigf ty
      | Ast_c.MetaInitVal(ty) -> Visitor_c.vk_ini bigf ty
      | Ast_c.MetaInitListVal(ty) -> Visitor_c.vk_ini_list bigf ty
      | Ast_c.MetaDeclVal(decl,_) -> Visitor_c.vk_decl bigf decl
      | Ast_c.MetaFieldVal(field) -> Visitor_c.vk_struct_field bigf field
      | Ast_c.MetaFieldListVal(fields) ->
	  Visitor_c.vk_struct_fields bigf fields
      | Ast_c.MetaFmtVal(fmt) -> Visitor_c.vk_string_format bigf fmt
      | Ast_c.MetaFragListVal(frags) ->
	  Visitor_c.vk_string_fragments bigf frags
      | Ast_c.MetaStmtVal(stm,_,_) -> Visitor_c.vk_statement bigf stm
      | Ast_c.MetaStmtListVal(stms,_) ->
	  Visitor_c.vk_statement_sequencable_list bigf stms
      | Ast_c.MetaPosVal _ | Ast_c.MetaPosValList _ | Ast_c.MetaComValList _
      | Ast_c.MetaListlenVal _ -> ()
      | Ast_c.MetaNoVal -> failwith "referencing a metavar with no value")
    env

let rename argids env =
  let argenv = List.map (function name ->
    let arg = Ast_c.str_of_name name in
    (arg,prefix^arg)
  ) argids in
  let lookup x = try List.assoc x argenv with Not_found -> x in
  let bigf =
    { Visitor_c.default_visitor_c_s with
    Visitor_c.kexpr_s = (fun (k,bigf) e ->
      match e with
	((Ast_c.Ident (name), info), []) ->

          (* pad: assert is_regular_ident ? *)
          let s = Ast_c.str_of_name name in
          let ii = Ast_c.info_of_name name in
	  let new_name = lookup s in
          let new_id = Ast_c.RegularName (new_name, [rewrap_str new_name ii]) in
	  ((Ast_c.Ident (new_id), info), Ast_c.noii)
      | _ -> k e) } in
  List.map
    (function (x,vl) ->
      (x,
       match vl with
	 Ast_c.MetaIdVal(_) | Ast_c.MetaFuncVal(_)
       | Ast_c.MetaAssignOpVal(_) | Ast_c.MetaBinaryOpVal(_)
       | Ast_c.MetaLocalFuncVal(_) -> vl
       | Ast_c.MetaExprVal(exp,c,ty) ->
	   Ast_c.MetaExprVal(Visitor_c.vk_expr_s bigf exp,c,ty)
       | Ast_c.MetaExprListVal(args) ->
	   Ast_c.MetaExprListVal(Visitor_c.vk_arguments_s bigf args)
       | Ast_c.MetaParamVal(param) ->
	   Ast_c.MetaParamVal(Visitor_c.vk_param_s bigf param)
       | Ast_c.MetaParamListVal(params) ->
	   Ast_c.MetaParamListVal(Visitor_c.vk_params_s bigf params)
       | Ast_c.MetaDParamListVal(params) ->
	   Ast_c.MetaDParamListVal(Visitor_c.vk_define_params_s bigf params)

       | Ast_c.MetaTypeVal(ty) ->
	   Ast_c.MetaTypeVal(Visitor_c.vk_type_s bigf ty)
       | Ast_c.MetaInitVal(ini) ->
	   Ast_c.MetaInitVal(Visitor_c.vk_ini_s bigf ini)
       | Ast_c.MetaInitListVal(ini) ->
	   Ast_c.MetaInitListVal(Visitor_c.vk_inis_s bigf ini)
       | Ast_c.MetaDeclVal(stm,original) ->
	   Ast_c.MetaDeclVal(Visitor_c.vk_decl_s bigf stm,
			     Visitor_c.vk_decl_s bigf original)
       | Ast_c.MetaFieldVal(stm) ->
	   Ast_c.MetaFieldVal(Visitor_c.vk_struct_field_s bigf stm)
       | Ast_c.MetaFieldListVal(stm) ->
	   Ast_c.MetaFieldListVal(Visitor_c.vk_struct_fields_s bigf stm)
       | Ast_c.MetaFmtVal(fmt) ->
	   Ast_c.MetaFmtVal(Visitor_c.vk_string_format_s bigf fmt)
       | Ast_c.MetaFragListVal(frags) ->
	   Ast_c.MetaFragListVal(Visitor_c.vk_string_fragments_s bigf frags)
       | Ast_c.MetaStmtVal(stm,original,ty) ->
	   Ast_c.MetaStmtVal(Visitor_c.vk_statement_s bigf stm,
			     Visitor_c.vk_statement_s bigf original,ty)
       | Ast_c.MetaStmtListVal(stm,ty) ->
	   Ast_c.MetaStmtListVal
	     (Visitor_c.vk_statement_sequencable_list_s bigf stm,ty)
       | Ast_c.MetaPosVal _ | Ast_c.MetaPosValList _ | Ast_c.MetaComValList _
       | Ast_c.MetaListlenVal _ -> vl
       | Ast_c.MetaNoVal -> failwith "referencing a metavar with no value"))
    env

let print_one_type pr env ty =
  match Common.map_option Ast.unwrap (Ast.typeC_of_fullType_opt ty) with
    Some (Ast_cocci.MetaType(name,cstr,keep,inherited)) ->
      (try
	match List.assoc name env with
	  Ast_c.MetaTypeVal ty ->
	    Pretty_print_c.pp_type_gen
	      (function x -> pr (Ast_c.str_of_info x))
	      (function _ -> pr " ")
	      ty
        | _ -> failwith "impossible"
      with Not_found -> pr (Ast_cocci.string_of_fullType ty))
  | _ -> pr (Ast_cocci.string_of_fullType ty)

let print_types pr env = function
    None -> ()
  | Some [ty] -> print_one_type pr env ty
  | Some types ->
      pr "{";
      Common.print_between (function _ -> pr ", ") (print_one_type pr env)
	types;
      pr "}"

let pp_len pr len =
  let pp_name (_,n) = pr n in
  match len with
    Ast.AnyLen -> ()
  | Ast.MetaLen (len,_) -> pr "["; pp_name len; pr "]"
  | Ast.CstLen len -> pr "["; pr (string_of_int len); pr "]"

let pp_meta_decl pr env decl =
  let no_arity = function Ast.NONE -> () | _ -> failwith "no arity allowed" in
  let pp_name (_,n) = pr n in
  match decl with
    Ast.MetaMetaDecl(ar, name) ->
      (* ignore virtual *)
      no_arity ar; pr "metavariable "; pp_name name; pr ";\n"
  | Ast.MetaIdDecl(ar, name) ->
      (* ignore virtual *)
      no_arity ar; pr "identifier "; pp_name name; pr ";\n"
  | Ast.MetaFreshIdDecl(name, Ast.NoVal) ->
      pr "fresh identifier "; pp_name name; pr ";\n"
  | Ast.MetaFreshIdDecl(name, Ast.StringSeed x) ->
      pr "fresh identifier "; pp_name name; pr " = \""; pr x; pr "\";\n"
  | Ast.MetaFreshIdDecl(name, Ast.ListSeed x) ->
      failwith "unparse_hrule: not supported"
  | Ast.MetaTypeDecl(ar, name) ->
      no_arity ar; pr "type "; pp_name name; pr ";\n"
  | Ast.MetaInitDecl(ar, name) ->
      no_arity ar; pr "initialiser "; pp_name name; pr ";\n"
  | Ast.MetaInitListDecl(ar, name, len) ->
      no_arity ar; pr "initialiser list "; pp_len pr len; pp_name name;
      pr ";\n"
  | Ast.MetaListlenDecl(name) -> ()
  | Ast.MetaParamDecl(ar, name) ->
      no_arity ar; pr "parameter "; pp_name name; pr ";\n"
  | Ast.MetaParamListDecl(ar, name, len) ->
      no_arity ar; pr "parameter list "; pp_len pr len; pp_name name; pr ";\n"
  | Ast.MetaDParamListDecl(ar, name, len) ->
      no_arity ar; pr "identifier list "; pp_len pr len; pp_name name; pr ";\n"
  | Ast.MetaBinaryOperatorDecl(ar, name) ->
      no_arity ar; pr "binary operator "; pp_name name; pr ";\n"
  | Ast.MetaAssignmentOperatorDecl(ar, name) ->
      no_arity ar; pr "assignment operator "; pp_name name; pr ";\n"
  | Ast.MetaConstDecl(ar, name, types) ->
      no_arity ar; pr "constant "; print_types pr env types;
      pp_name name; pr ";\n"
  | Ast.MetaErrDecl(ar, name) ->
      no_arity ar; pr "error "; pp_name name; pr ";\n"
  | Ast.MetaExpDecl(ar, name, None, _bitfield) ->
      no_arity ar; pr "expression "; pp_name name; pr ";\n"
  | Ast.MetaExpDecl(ar, name, types, _bitfield) ->
      no_arity ar; print_types pr env types; pp_name name; pr ";\n"
  | Ast.MetaIdExpDecl(ar, name, types) ->
      no_arity ar; pr "idexpression ";
      print_types pr env types; pp_name name; pr ";\n"
  | Ast.MetaLocalIdExpDecl(ar, name, types) ->
      no_arity ar; pr "local idexpression ";
      print_types pr env types; pp_name name; pr ";\n"
  | Ast.MetaGlobalIdExpDecl(ar, name, types) ->
      no_arity ar; pr "global idexpression ";
      print_types pr env types; pp_name name; pr ";\n"
  | Ast.MetaExpListDecl(ar, name, len) ->
      no_arity ar; pr "parameter list "; pp_len pr len; pp_name name; pr ";\n"
  | Ast.MetaDeclDecl(ar, name) ->
      no_arity ar; pr "declaration "; pp_name name; pr ";\n"
  | Ast.MetaFieldDecl(ar, name) ->
      no_arity ar; pr "field "; pp_name name; pr ";\n"
  | Ast.MetaFieldListDecl(ar, name, len) ->
      no_arity ar; pr "field list "; pp_len pr len; pp_name name; pr ";\n"
  | Ast.MetaStmDecl(ar, name) ->
      no_arity ar; pr "statement "; pp_name name; pr ";\n"
  | Ast.MetaStmListDecl(ar, name, len) ->
      no_arity ar; pr "statement list "; pp_len pr len; pp_name name; pr ";\n"
  | Ast.MetaFuncDecl(ar, name) ->
      no_arity ar; pr "function "; pp_name name; pr ";\n"
  | Ast.MetaLocalFuncDecl(ar, name) ->
      no_arity ar; pr "local function "; pp_name name; pr ";\n"
  | Ast.MetaPosDecl(ar, name) ->
      no_arity ar; pr "position "; pp_name name; pr ";\n"
  | Ast.MetaComDecl(ar, name) ->
      no_arity ar; pr "comments "; pp_name name; pr ";\n"
  | Ast.MetaFmtDecl(ar, name) ->
      no_arity ar; pr "format "; pp_name name; pr ";\n"
  | Ast.MetaFragListDecl(ar, name, len) ->
      no_arity ar; pr "format list "; pp_len pr len; pp_name name; pr ";\n"
  | Ast.MetaAnalysisDecl(code, name) ->
      pr "analysis"; pr code; pr " "; pp_name name; pr ";\n"
  | Ast.MetaDeclarerDecl(ar, name) ->
      no_arity ar; pr "declarer "; pp_name name; pr ";\n"
  | Ast.MetaIteratorDecl(ar, name) ->
      no_arity ar; pr "iterator "; pp_name name; pr ";\n"
  | Ast.MetaScriptDecl(_, name) -> failwith "script metavariable"

let print_metavariables pr local_metas paramst env header_req function_name =
  (if header_req
  then pr "@depends on header@\n"
  else pr "@@\n");
  pr (Printf.sprintf "position _p!=same_%s.p;\n" function_name);
  pr "identifier _f;\n";
  let rec loop = function
      [] | [{Ast_c.p_type =(_,(Ast_c.BaseType(Ast_c.Void),_))},_] -> []
    | ((first,_) as f)::rest ->
	print_metavar pr first; pr ";\n";
	(make_exp f) :: loop rest in
  let args = loop paramst in
  print_extra_typedefs pr env;
  List.iter (pp_meta_decl pr env) local_metas;
  pr "@@\n\n";
  args

(* ----------------------------------------------------------------------- *)
(* print_start/end *)

let print_start pr =
  pr "_f@_p(...) { <+...\n"

let print_end pr =
  pr "\n...+> }\n"

(* ----------------------------------------------------------------------- *)
(* Print call to the defined function *)

let print_param_name pr = function
    {Ast_c.p_namei = Some name} -> pr (Ast_c.str_of_name name)
  | _ -> failwith "function must have named parameters"

let pp_def_gen pr defn isexp =
  let {Ast_c.f_name = name; f_type = (_, (paramst, (b, iib))); } = defn in
  pr (Ast_c.str_of_name name); pr "(";
  (if b then failwith "not handling variable argument functions");
  (match paramst with
    [] | [{Ast_c.p_type = (_,(Ast_c.BaseType(Ast_c.Void),_))},_] -> ()
  | (first,_)::rest ->
      print_param_name pr first;
      List.iter (function (x,_) -> pr ", "; print_param_name pr x) rest);
  pr ")"; if not isexp then pr ";"

(* ----------------------------------------------------------------------- *)
(* Entry point *)

let pp_rule local_metas ast env srcfile =
  let (paramst,args_name) = get_paramst env in
  (* get rule information *)
  let (rule,printable) =
    match ast with
      Ast.CocciRule(_,_,[body],_,_) -> (* could extend to use attributes *)
	(body,
	 match Ast.unwrap body with
	   Ast.NONDECL(s) -> [[Ast.StatementTag s]]
	 | Ast.CODE(ss) -> [[Ast.StmtDotsTag ss]]
	 | _ -> error body "bad rule body")
    | _ -> failwith "bad rule" in
  (* create the output file *)
  let outdir =
    match !Flag.make_hrule with
      Some outdir -> outdir
    | None -> error rule "not possible" in
  let function_name = get_function_name rule env in
  let function_name_count =
    try
      let cell = List.assoc function_name !names in
      let ct = !cell in
      cell := ct + 1;
      function_name ^ (string_of_int ct)
    with Not_found ->
      let cell = ref 1 in
      names := (function_name,cell) :: !names;
      function_name in
  let outfile = outdir ^ "/" ^
    (if !Flag.hrule_per_file
    then Filename.chop_extension (Filename.basename srcfile)
    else function_name_count) in
  let escape_re = Str.regexp_string "/" in
  let dir = if !Flag.dir = "" then Filename.dirname srcfile else !Flag.dir in
  let outdirfile = Str.global_replace escape_re "_"dir in
  let outfile = outfile ^ outdirfile ^ ".cocci" in
  let saved_header_req =
    try let res = List.assoc outfile !started_files in Some res
    with Not_found -> None in
  current_outfile := outfile;
  Common.with_open_outfile_append outfile (fun (pr,chan) ->
    let header_req =
      match saved_header_req with
	Some x -> x
      |	None ->
	  let res = print_header_rule pr srcfile in
	  started_files := (outfile,res)::!started_files;
	  res in
    print_check_rule pr function_name function_name_count header_req;
    let env' = List.map (fun (a, b) -> (Ast_cocci.make_mcode a, b)) env in
    let args =
      print_metavariables pr local_metas paramst env' header_req
	function_name_count in
    let (argids,args) = List.split args in
    let env = rename argids env in
    let env = (args_name,Ast_c.MetaExprListVal args)::env in
    print_start pr;
    (* for printing C tokens *)
    let pr_c info =
      match Ast_c.pinfo_of_info info with
	Ast_c.AbstractLineTok _ -> pr (Ast_c.str_of_info info)
      | Ast_c.FakeTok (s,_) -> pr s
      |	_ ->
	  Printf.printf "line: %s\n" (Dumper.dump info);
	  error rule "not an abstract line" in
    let pr_space _ = pr " " in
    Unparse_cocci.pp_list_list_any
      ([env], (fun s _ _ _ _ -> pr s), pr_c, pr_space, pr_space, pr,
       (fun _ _ -> ()), (function _ -> ()), (function _ -> ()),
       (function _ -> ()))
      true printable Unparse_cocci.InPlace;
    print_end pr;
    pr "\n")