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c491d8ee C |
1 | (* |
2 | * Copyright 2010, INRIA, University of Copenhagen | |
3 | * Julia Lawall, Rene Rydhof Hansen, Gilles Muller, Nicolas Palix | |
4 | * Copyright 2005-2009, Ecole des Mines de Nantes, University of Copenhagen | |
5 | * Yoann Padioleau, Julia Lawall, Rene Rydhof Hansen, Henrik Stuart, Gilles Muller, Nicolas Palix | |
6 | * This file is part of Coccinelle. | |
7 | * | |
8 | * Coccinelle is free software: you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation, according to version 2 of the License. | |
11 | * | |
12 | * Coccinelle is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with Coccinelle. If not, see <http://www.gnu.org/licenses/>. | |
19 | * | |
20 | * The authors reserve the right to distribute this or future versions of | |
21 | * Coccinelle under other licenses. | |
22 | *) | |
23 | ||
24 | ||
34e49164 C |
25 | { |
26 | open Parser_cocci_menhir | |
27 | module D = Data | |
28 | module Ast = Ast_cocci | |
29 | module Ast0 = Ast0_cocci | |
30 | module P = Parse_aux | |
31 | exception Lexical of string | |
32 | let tok = Lexing.lexeme | |
33 | ||
34 | let line = ref 1 | |
35 | let logical_line = ref 0 | |
36 | ||
37 | (* ---------------------------------------------------------------------- *) | |
38 | (* control codes *) | |
39 | ||
40 | (* Defined in data.ml | |
41 | type line_type = MINUS | OPTMINUS | UNIQUEMINUS | PLUS | CONTEXT | UNIQUE | OPT | |
42 | *) | |
43 | ||
44 | let current_line_type = ref (D.CONTEXT,!line,!logical_line) | |
45 | ||
46 | let prev_plus = ref false | |
47 | let line_start = ref 0 (* offset of the beginning of the line *) | |
48 | let get_current_line_type lexbuf = | |
49 | let (c,l,ll) = !current_line_type in | |
50 | let lex_start = Lexing.lexeme_start lexbuf in | |
51 | let preceeding_spaces = | |
52 | if !line_start < 0 then 0 else lex_start - !line_start in | |
708f4980 | 53 | (*line_start := -1;*) |
951c7801 | 54 | prev_plus := (c = D.PLUS) or (c = D.PLUSPLUS); |
34e49164 C |
55 | (c,l,ll,lex_start,preceeding_spaces,[],[],Ast0.NoMetaPos) |
56 | let current_line_started = ref false | |
57 | let col_zero = ref true | |
58 | ||
59 | let reset_line lexbuf = | |
60 | line := !line + 1; | |
61 | current_line_type := (D.CONTEXT,!line,!logical_line); | |
62 | current_line_started := false; | |
63 | col_zero := true; | |
64 | line_start := Lexing.lexeme_start lexbuf + 1 | |
65 | ||
66 | let started_line = ref (-1) | |
67 | ||
68 | let start_line seen_char = | |
69 | current_line_started := true; | |
70 | col_zero := false; | |
71 | (if seen_char && not(!line = !started_line) | |
72 | then | |
73 | begin | |
74 | started_line := !line; | |
75 | logical_line := !logical_line + 1 | |
76 | end) | |
77 | ||
78 | let pass_zero _ = col_zero := false | |
79 | ||
80 | let lexerr s1 s2 = raise (Lexical (Printf.sprintf "%s%s" s1 s2)) | |
81 | ||
82 | let add_current_line_type x = | |
83 | match (x,!current_line_type) with | |
84 | (D.MINUS,(D.CONTEXT,ln,lln)) -> | |
85 | current_line_type := (D.MINUS,ln,lln) | |
86 | | (D.MINUS,(D.UNIQUE,ln,lln)) -> | |
87 | current_line_type := (D.UNIQUEMINUS,ln,lln) | |
88 | | (D.MINUS,(D.OPT,ln,lln)) -> | |
89 | current_line_type := (D.OPTMINUS,ln,lln) | |
90 | | (D.PLUS,(D.CONTEXT,ln,lln)) -> | |
91 | current_line_type := (D.PLUS,ln,lln) | |
951c7801 C |
92 | | (D.PLUSPLUS,(D.CONTEXT,ln,lln)) -> |
93 | current_line_type := (D.PLUSPLUS,ln,lln) | |
34e49164 C |
94 | | (D.UNIQUE,(D.CONTEXT,ln,lln)) -> |
95 | current_line_type := (D.UNIQUE,ln,lln) | |
96 | | (D.OPT,(D.CONTEXT,ln,lln)) -> | |
97 | current_line_type := (D.OPT,ln,lln) | |
98 | | _ -> lexerr "invalid control character combination" "" | |
99 | ||
100 | let check_minus_context_linetype s = | |
101 | match !current_line_type with | |
951c7801 | 102 | (D.PLUS,_,_) | (D.PLUSPLUS,_,_) -> lexerr "invalid in a + context: " s |
34e49164 C |
103 | | _ -> () |
104 | ||
105 | let check_context_linetype s = | |
106 | match !current_line_type with | |
107 | (D.CONTEXT,_,_) -> () | |
108 | | _ -> lexerr "invalid in a nonempty context: " s | |
109 | ||
110 | let check_plus_linetype s = | |
111 | match !current_line_type with | |
951c7801 | 112 | (D.PLUS,_,_) | (D.PLUSPLUS,_,_) -> () |
34e49164 C |
113 | | _ -> lexerr "invalid in a non + context: " s |
114 | ||
115 | let check_arity_context_linetype s = | |
116 | match !current_line_type with | |
951c7801 C |
117 | (D.CONTEXT,_,_) | (D.PLUS,_,_) | (D.PLUSPLUS,_,_) |
118 | | (D.UNIQUE,_,_) | (D.OPT,_,_) -> () | |
34e49164 C |
119 | | _ -> lexerr "invalid in a nonempty context: " s |
120 | ||
aa721442 C |
121 | let check_comment s = |
122 | if not !current_line_started | |
123 | then lexerr "+ expected at the beginning of the line" s | |
124 | ||
34e49164 C |
125 | let process_include start finish str = |
126 | (match !current_line_type with | |
951c7801 | 127 | (D.PLUS,_,_) | (D.PLUSPLUS,_,_) -> |
34e49164 C |
128 | (try |
129 | let _ = Str.search_forward (Str.regexp "\\.\\.\\.") str start in | |
130 | lexerr "... not allowed in + include" "" | |
131 | with Not_found -> ()) | |
132 | | _ -> ()); | |
133 | String.sub str (start + 1) (finish - start - 1) | |
134 | ||
135 | (* ---------------------------------------------------------------------- *) | |
136 | type pm = PATCH | MATCH | UNKNOWN | |
137 | ||
138 | let pm = ref UNKNOWN | |
139 | ||
140 | let patch_or_match = function | |
141 | PATCH -> | |
7f004419 C |
142 | if not !D.ignore_patch_or_match |
143 | then | |
144 | (match !pm with | |
145 | MATCH -> | |
146 | lexerr "- or + not allowed in the first column for a match" "" | |
147 | | PATCH -> () | |
148 | | UNKNOWN -> Flag.sgrep_mode2 := false; pm := PATCH) | |
34e49164 | 149 | | MATCH -> |
7f004419 C |
150 | if not !D.ignore_patch_or_match |
151 | then | |
152 | (match !pm with | |
153 | PATCH -> lexerr "* not allowed in the first column for a patch" "" | |
154 | | MATCH -> () | |
155 | | UNKNOWN -> Flag.sgrep_mode2 := true; pm := MATCH) | |
34e49164 C |
156 | | _ -> failwith "unexpected argument" |
157 | ||
158 | (* ---------------------------------------------------------------------- *) | |
159 | (* identifiers, including metavariables *) | |
160 | ||
161 | let metavariables = (Hashtbl.create(100) : (string, D.clt -> token) Hashtbl.t) | |
162 | ||
163 | let all_metavariables = | |
164 | (Hashtbl.create(100) : (string,(string * (D.clt -> token)) list) Hashtbl.t) | |
165 | ||
166 | let type_names = (Hashtbl.create(100) : (string, D.clt -> token) Hashtbl.t) | |
167 | ||
168 | let declarer_names = (Hashtbl.create(100) : (string, D.clt -> token) Hashtbl.t) | |
169 | ||
170 | let iterator_names = (Hashtbl.create(100) : (string, D.clt -> token) Hashtbl.t) | |
171 | ||
172 | let rule_names = (Hashtbl.create(100) : (string, unit) Hashtbl.t) | |
173 | ||
174 | let check_var s linetype = | |
175 | let fail _ = | |
176 | if (!Data.in_prolog || !Data.in_rule_name) && | |
177 | Str.string_match (Str.regexp "<.*>") s 0 | |
178 | then TPathIsoFile s | |
179 | else | |
180 | try (Hashtbl.find metavariables s) linetype | |
181 | with Not_found -> | |
182 | (try (Hashtbl.find type_names s) linetype | |
183 | with Not_found -> | |
184 | (try (Hashtbl.find declarer_names s) linetype | |
faf9a90c | 185 | with Not_found -> |
34e49164 C |
186 | (try (Hashtbl.find iterator_names s) linetype |
187 | with Not_found -> TIdent (s,linetype)))) in | |
188 | if !Data.in_meta or !Data.in_rule_name | |
189 | then (try Hashtbl.find rule_names s; TRuleName s with Not_found -> fail()) | |
190 | else fail() | |
191 | ||
192 | let id_tokens lexbuf = | |
193 | let s = tok lexbuf in | |
194 | let linetype = get_current_line_type lexbuf in | |
195 | let in_rule_name = !Data.in_rule_name in | |
978fd7e5 | 196 | let in_meta = !Data.in_meta && not !Data.saw_struct in |
34e49164 C |
197 | let in_iso = !Data.in_iso in |
198 | let in_prolog = !Data.in_prolog in | |
199 | match s with | |
200 | "identifier" when in_meta -> check_arity_context_linetype s; TIdentifier | |
201 | | "type" when in_meta -> check_arity_context_linetype s; TType | |
202 | | "parameter" when in_meta -> check_arity_context_linetype s; TParameter | |
203 | | "constant" when in_meta -> check_arity_context_linetype s; TConstant | |
faf9a90c C |
204 | | "generated" when in_rule_name && not (!Flag.make_hrule = None) -> |
205 | check_arity_context_linetype s; TGenerated | |
34e49164 C |
206 | | "expression" when in_meta || in_rule_name -> |
207 | check_arity_context_linetype s; TExpression | |
413ffc02 C |
208 | | "declaration" when in_meta || in_rule_name -> |
209 | check_arity_context_linetype s; TDeclaration | |
210 | | "field" when in_meta || in_rule_name -> | |
211 | check_arity_context_linetype s; TField | |
113803cf C |
212 | | "initialiser" when in_meta || in_rule_name -> |
213 | check_arity_context_linetype s; TInitialiser | |
214 | | "initializer" when in_meta || in_rule_name -> | |
215 | check_arity_context_linetype s; TInitialiser | |
34e49164 C |
216 | | "idexpression" when in_meta -> |
217 | check_arity_context_linetype s; TIdExpression | |
218 | | "statement" when in_meta -> check_arity_context_linetype s; TStatement | |
219 | | "function" when in_meta -> check_arity_context_linetype s; TFunction | |
220 | | "local" when in_meta -> check_arity_context_linetype s; TLocal | |
221 | | "list" when in_meta -> check_arity_context_linetype s; Tlist | |
222 | | "fresh" when in_meta -> check_arity_context_linetype s; TFresh | |
223 | | "typedef" when in_meta -> check_arity_context_linetype s; TTypedef | |
224 | | "declarer" when in_meta -> check_arity_context_linetype s; TDeclarer | |
225 | | "iterator" when in_meta -> check_arity_context_linetype s; TIterator | |
226 | | "name" when in_meta -> check_arity_context_linetype s; TName | |
227 | | "position" when in_meta -> check_arity_context_linetype s; TPosition | |
228 | | "any" when in_meta -> check_arity_context_linetype s; TPosAny | |
229 | | "pure" when in_meta && in_iso -> | |
230 | check_arity_context_linetype s; TPure | |
231 | | "context" when in_meta && in_iso -> | |
232 | check_arity_context_linetype s; TContext | |
233 | | "error" when in_meta -> check_arity_context_linetype s; TError | |
234 | | "words" when in_meta -> check_context_linetype s; TWords | |
235 | ||
236 | | "using" when in_rule_name || in_prolog -> check_context_linetype s; TUsing | |
ae4735db C |
237 | | "virtual" when in_prolog or in_rule_name or in_meta -> |
238 | (* don't want to allow virtual as a rule name *) | |
239 | check_context_linetype s; TVirtual | |
34e49164 C |
240 | | "disable" when in_rule_name -> check_context_linetype s; TDisable |
241 | | "extends" when in_rule_name -> check_context_linetype s; TExtends | |
242 | | "depends" when in_rule_name -> check_context_linetype s; TDepends | |
243 | | "on" when in_rule_name -> check_context_linetype s; TOn | |
244 | | "ever" when in_rule_name -> check_context_linetype s; TEver | |
245 | | "never" when in_rule_name -> check_context_linetype s; TNever | |
978fd7e5 | 246 | (* exists and forall for when are reparsed in parse_cocci.ml *) |
34e49164 C |
247 | | "exists" when in_rule_name -> check_context_linetype s; TExists |
248 | | "forall" when in_rule_name -> check_context_linetype s; TForall | |
b1b2de81 C |
249 | | "script" when in_rule_name -> check_context_linetype s; TScript |
250 | | "initialize" when in_rule_name -> check_context_linetype s; TInitialize | |
251 | | "finalize" when in_rule_name -> check_context_linetype s; TFinalize | |
34e49164 C |
252 | |
253 | | "char" -> Tchar linetype | |
254 | | "short" -> Tshort linetype | |
255 | | "int" -> Tint linetype | |
256 | | "double" -> Tdouble linetype | |
257 | | "float" -> Tfloat linetype | |
258 | | "long" -> Tlong linetype | |
259 | | "void" -> Tvoid linetype | |
1eddfd50 C |
260 | | "size_t" -> Tsize_t linetype |
261 | | "ssize_t" -> Tssize_t linetype | |
262 | | "ptrdiff_t" -> Tptrdiff_t linetype | |
978fd7e5 C |
263 | (* in_meta is only for the first keyword; drop it now to allow any type |
264 | name *) | |
265 | | "struct" -> Data.saw_struct := true; Tstruct linetype | |
266 | | "union" -> Data.saw_struct := true; Tunion linetype | |
267 | | "enum" -> Data.saw_struct := true; Tenum linetype | |
34e49164 C |
268 | | "unsigned" -> Tunsigned linetype |
269 | | "signed" -> Tsigned linetype | |
faf9a90c | 270 | |
34e49164 C |
271 | | "auto" -> Tauto linetype |
272 | | "register" -> Tregister linetype | |
273 | | "extern" -> Textern linetype | |
274 | | "static" -> Tstatic linetype | |
275 | | "inline" -> Tinline linetype | |
276 | | "typedef" -> Ttypedef linetype | |
277 | ||
278 | | "const" -> Tconst linetype | |
279 | | "volatile" -> Tvolatile linetype | |
280 | ||
281 | | "if" -> TIf linetype | |
282 | | "else" -> TElse linetype | |
283 | | "while" -> TWhile linetype | |
284 | | "do" -> TDo linetype | |
285 | | "for" -> TFor linetype | |
286 | | "switch" -> TSwitch linetype | |
287 | | "case" -> TCase linetype | |
288 | | "default" -> TDefault linetype | |
289 | | "return" -> TReturn linetype | |
290 | | "break" -> TBreak linetype | |
291 | | "continue" -> TContinue linetype | |
292 | | "goto" -> TGoto linetype | |
293 | ||
294 | | "sizeof" -> TSizeof linetype | |
295 | ||
aba5c457 C |
296 | | "Expression" when !Data.in_iso -> TIsoExpression |
297 | | "ArgExpression" when !Data.in_iso -> TIsoArgExpression | |
298 | | "TestExpression" when !Data.in_iso -> TIsoTestExpression | |
299 | | "ToTestExpression" when !Data.in_iso -> TIsoToTestExpression | |
300 | | "Statement" when !Data.in_iso -> TIsoStatement | |
301 | | "Declaration" when !Data.in_iso -> TIsoDeclaration | |
302 | | "Type" when !Data.in_iso -> TIsoType | |
303 | | "TopLevel" when !Data.in_iso -> TIsoTopLevel | |
304 | ||
305 | | "_" when !Data.in_meta -> TUnderscore | |
34e49164 C |
306 | |
307 | | s -> check_var s linetype | |
308 | ||
309 | let mkassign op lexbuf = | |
310 | TAssign (Ast.OpAssign op, (get_current_line_type lexbuf)) | |
311 | ||
312 | let init _ = | |
313 | line := 1; | |
314 | logical_line := 0; | |
315 | prev_plus := false; | |
316 | line_start := 0; | |
317 | current_line_started := false; | |
c3e37e97 | 318 | current_line_type := (D.CONTEXT,0,0); |
34e49164 C |
319 | col_zero := true; |
320 | pm := UNKNOWN; | |
321 | Data.in_rule_name := false; | |
322 | Data.in_meta := false; | |
323 | Data.in_prolog := false; | |
978fd7e5 | 324 | Data.saw_struct := false; |
34e49164 C |
325 | Data.inheritable_positions := []; |
326 | Hashtbl.clear all_metavariables; | |
327 | Hashtbl.clear Data.all_metadecls; | |
328 | Hashtbl.clear metavariables; | |
329 | Hashtbl.clear type_names; | |
330 | Hashtbl.clear rule_names; | |
708f4980 C |
331 | Hashtbl.clear iterator_names; |
332 | Hashtbl.clear declarer_names; | |
34e49164 C |
333 | let get_name (_,x) = x in |
334 | Data.add_id_meta := | |
335 | (fun name constraints pure -> | |
336 | let fn clt = TMetaId(name,constraints,pure,clt) in | |
337 | Hashtbl.replace metavariables (get_name name) fn); | |
ae4735db C |
338 | Data.add_virt_id_meta_found := |
339 | (fun name vl -> | |
340 | let fn clt = TIdent(vl,clt) in | |
341 | Hashtbl.replace metavariables name fn); | |
342 | Data.add_virt_id_meta_not_found := | |
343 | (fun name pure -> | |
344 | let fn clt = TMetaId(name,Ast.IdNoConstraint,pure,clt) in | |
345 | Hashtbl.replace metavariables (get_name name) fn); | |
b1b2de81 C |
346 | Data.add_fresh_id_meta := |
347 | (fun name -> | |
951c7801 | 348 | let fn clt = TMetaId(name,Ast.IdNoConstraint,Ast0.Impure,clt) in |
b1b2de81 | 349 | Hashtbl.replace metavariables (get_name name) fn); |
34e49164 C |
350 | Data.add_type_meta := |
351 | (fun name pure -> | |
352 | let fn clt = TMetaType(name,pure,clt) in | |
353 | Hashtbl.replace metavariables (get_name name) fn); | |
113803cf C |
354 | Data.add_init_meta := |
355 | (fun name pure -> | |
356 | let fn clt = TMetaInit(name,pure,clt) in | |
357 | Hashtbl.replace metavariables (get_name name) fn); | |
34e49164 C |
358 | Data.add_param_meta := |
359 | (function name -> function pure -> | |
360 | let fn clt = TMetaParam(name,pure,clt) in | |
361 | Hashtbl.replace metavariables (get_name name) fn); | |
362 | Data.add_paramlist_meta := | |
363 | (function name -> function lenname -> function pure -> | |
364 | let fn clt = TMetaParamList(name,lenname,pure,clt) in | |
365 | Hashtbl.replace metavariables (get_name name) fn); | |
366 | Data.add_const_meta := | |
367 | (fun tyopt name constraints pure -> | |
368 | let fn clt = TMetaConst(name,constraints,pure,tyopt,clt) in | |
369 | Hashtbl.replace metavariables (get_name name) fn); | |
370 | Data.add_err_meta := | |
371 | (fun name constraints pure -> | |
372 | let fn clt = TMetaErr(name,constraints,pure,clt) in | |
373 | Hashtbl.replace metavariables (get_name name) fn); | |
374 | Data.add_exp_meta := | |
375 | (fun tyopt name constraints pure -> | |
376 | let fn clt = TMetaExp(name,constraints,pure,tyopt,clt) in | |
377 | Hashtbl.replace metavariables (get_name name) fn); | |
378 | Data.add_idexp_meta := | |
379 | (fun tyopt name constraints pure -> | |
380 | let fn clt = TMetaIdExp(name,constraints,pure,tyopt,clt) in | |
381 | Hashtbl.replace metavariables (get_name name) fn); | |
382 | Data.add_local_idexp_meta := | |
383 | (fun tyopt name constraints pure -> | |
384 | let fn clt = TMetaLocalIdExp(name,constraints,pure,tyopt,clt) in | |
385 | Hashtbl.replace metavariables (get_name name) fn); | |
386 | Data.add_explist_meta := | |
387 | (function name -> function lenname -> function pure -> | |
388 | let fn clt = TMetaExpList(name,lenname,pure,clt) in | |
389 | Hashtbl.replace metavariables (get_name name) fn); | |
413ffc02 C |
390 | Data.add_decl_meta := |
391 | (function name -> function pure -> | |
392 | let fn clt = TMetaDecl(name,pure,clt) in | |
393 | Hashtbl.replace metavariables (get_name name) fn); | |
394 | Data.add_field_meta := | |
395 | (function name -> function pure -> | |
396 | let fn clt = TMetaField(name,pure,clt) in | |
397 | Hashtbl.replace metavariables (get_name name) fn); | |
34e49164 C |
398 | Data.add_stm_meta := |
399 | (function name -> function pure -> | |
400 | let fn clt = TMetaStm(name,pure,clt) in | |
401 | Hashtbl.replace metavariables (get_name name) fn); | |
402 | Data.add_stmlist_meta := | |
403 | (function name -> function pure -> | |
404 | let fn clt = TMetaStmList(name,pure,clt) in | |
405 | Hashtbl.replace metavariables (get_name name) fn); | |
406 | Data.add_func_meta := | |
407 | (fun name constraints pure -> | |
408 | let fn clt = TMetaFunc(name,constraints,pure,clt) in | |
409 | Hashtbl.replace metavariables (get_name name) fn); | |
410 | Data.add_local_func_meta := | |
411 | (fun name constraints pure -> | |
412 | let fn clt = TMetaLocalFunc(name,constraints,pure,clt) in | |
413 | Hashtbl.replace metavariables (get_name name) fn); | |
414 | Data.add_iterator_meta := | |
415 | (fun name constraints pure -> | |
416 | let fn clt = TMetaIterator(name,constraints,pure,clt) in | |
417 | Hashtbl.replace metavariables (get_name name) fn); | |
418 | Data.add_declarer_meta := | |
419 | (fun name constraints pure -> | |
420 | let fn clt = TMetaDeclarer(name,constraints,pure,clt) in | |
421 | Hashtbl.replace metavariables (get_name name) fn); | |
422 | Data.add_pos_meta := | |
423 | (fun name constraints any -> | |
424 | let fn ((d,ln,_,_,_,_,_,_) as clt) = | |
425 | (if d = Data.PLUS | |
426 | then | |
427 | failwith | |
428 | (Printf.sprintf "%d: positions only allowed in minus code" ln)); | |
429 | TMetaPos(name,constraints,any,clt) in | |
430 | Hashtbl.replace metavariables (get_name name) fn); | |
431 | Data.add_type_name := | |
432 | (function name -> | |
433 | let fn clt = TTypeId(name,clt) in | |
434 | Hashtbl.replace type_names name fn); | |
435 | Data.add_declarer_name := | |
436 | (function name -> | |
437 | let fn clt = TDeclarerId(name,clt) in | |
438 | Hashtbl.replace declarer_names name fn); | |
439 | Data.add_iterator_name := | |
440 | (function name -> | |
441 | let fn clt = TIteratorId(name,clt) in | |
442 | Hashtbl.replace iterator_names name fn); | |
443 | Data.init_rule := (function _ -> Hashtbl.clear metavariables); | |
444 | Data.install_bindings := | |
445 | (function parent -> | |
446 | List.iter (function (name,fn) -> Hashtbl.add metavariables name fn) | |
447 | (Hashtbl.find all_metavariables parent)) | |
448 | ||
5636bb2c C |
449 | (* the following is needed to properly tokenize include files. Because an |
450 | include file is included after seeing a @, so current_line_started is true. | |
451 | Current_line_started is not important for parsing the name of a rule, so we | |
452 | don't have to reset this value to true after parsing an included file. *) | |
453 | let include_init _ = | |
454 | current_line_started := false | |
455 | ||
34e49164 C |
456 | let drop_spaces s = |
457 | let len = String.length s in | |
458 | let rec loop n = | |
459 | if n = len | |
460 | then n | |
461 | else | |
462 | if List.mem (String.get s n) [' ';'\t'] | |
463 | then loop (n+1) | |
464 | else n in | |
465 | let start = loop 0 in | |
466 | String.sub s start (len - start) | |
467 | } | |
468 | ||
469 | (* ---------------------------------------------------------------------- *) | |
470 | (* tokens *) | |
471 | ||
472 | let letter = ['A'-'Z' 'a'-'z' '_'] | |
473 | let digit = ['0'-'9'] | |
474 | ||
475 | let dec = ['0'-'9'] | |
476 | let oct = ['0'-'7'] | |
477 | let hex = ['0'-'9' 'a'-'f' 'A'-'F'] | |
478 | ||
479 | let decimal = ('0' | (['1'-'9'] dec*)) | |
480 | let octal = ['0'] oct+ | |
faf9a90c | 481 | let hexa = ("0x" |"0X") hex+ |
34e49164 C |
482 | |
483 | let pent = dec+ | |
484 | let pfract = dec+ | |
485 | let sign = ['-' '+'] | |
486 | let exp = ['e''E'] sign? dec+ | |
487 | let real = pent exp | ((pent? '.' pfract | pent '.' pfract? ) exp?) | |
488 | ||
489 | ||
490 | rule token = parse | |
c3e37e97 C |
491 | | [' ' '\t']* ['\n' '\r' '\011' '\012'] |
492 | { let cls = !current_line_started in | |
493 | ||
494 | if not cls | |
495 | then | |
496 | begin | |
497 | match !current_line_type with | |
498 | (D.PLUS,_,_) | (D.PLUSPLUS,_,_) -> | |
499 | let info = get_current_line_type lexbuf in | |
500 | reset_line lexbuf; | |
501 | TPragma (Ast.Noindent "", info) | |
502 | | _ -> reset_line lexbuf; token lexbuf | |
503 | end | |
504 | else (reset_line lexbuf; token lexbuf) } | |
505 | ||
506 | | [' ' '\t' ]+ { start_line false; token lexbuf } | |
507 | ||
508 | | "//" [^ '\n']* { | |
509 | match !current_line_type with | |
510 | (D.PLUS,_,_) | (D.PLUSPLUS,_,_) -> | |
511 | TPragma (Ast.Indent (tok lexbuf), get_current_line_type lexbuf) | |
512 | | _ -> start_line false; token lexbuf } | |
34e49164 C |
513 | |
514 | | "@@" { start_line true; TArobArob } | |
515 | | "@" { pass_zero(); | |
516 | if !Data.in_rule_name or not !current_line_started | |
517 | then (start_line true; TArob) | |
518 | else (check_minus_context_linetype "@"; TPArob) } | |
519 | ||
951c7801 C |
520 | | "~=" { start_line true; TTildeEq (get_current_line_type lexbuf) } |
521 | | "!~=" { start_line true; TTildeExclEq (get_current_line_type lexbuf) } | |
34e49164 C |
522 | | "WHEN" | "when" |
523 | { start_line true; check_minus_context_linetype (tok lexbuf); | |
524 | TWhen (get_current_line_type lexbuf) } | |
525 | ||
526 | | "..." | |
527 | { start_line true; check_minus_context_linetype (tok lexbuf); | |
528 | TEllipsis (get_current_line_type lexbuf) } | |
529 | (* | |
530 | | "ooo" | |
531 | { start_line true; check_minus_context_linetype (tok lexbuf); | |
532 | TCircles (get_current_line_type lexbuf) } | |
533 | ||
534 | | "***" | |
535 | { start_line true; check_minus_context_linetype (tok lexbuf); | |
536 | TStars (get_current_line_type lexbuf) } | |
537 | *) | |
538 | | "<..." { start_line true; check_context_linetype (tok lexbuf); | |
539 | TOEllipsis (get_current_line_type lexbuf) } | |
540 | | "...>" { start_line true; check_context_linetype (tok lexbuf); | |
541 | TCEllipsis (get_current_line_type lexbuf) } | |
5636bb2c | 542 | | "<+..." { start_line true; check_minus_context_linetype (tok lexbuf); |
34e49164 | 543 | TPOEllipsis (get_current_line_type lexbuf) } |
5636bb2c | 544 | | "...+>" { start_line true; check_minus_context_linetype (tok lexbuf); |
34e49164 C |
545 | TPCEllipsis (get_current_line_type lexbuf) } |
546 | (* | |
547 | | "<ooo" { start_line true; check_context_linetype (tok lexbuf); | |
548 | TOCircles (get_current_line_type lexbuf) } | |
549 | | "ooo>" { start_line true; check_context_linetype (tok lexbuf); | |
550 | TCCircles (get_current_line_type lexbuf) } | |
551 | ||
552 | | "<***" { start_line true; check_context_linetype (tok lexbuf); | |
553 | TOStars (get_current_line_type lexbuf) } | |
554 | | "***>" { start_line true; check_context_linetype (tok lexbuf); | |
555 | TCStars (get_current_line_type lexbuf) } | |
556 | *) | |
557 | | "-" { pass_zero(); | |
558 | if !current_line_started | |
559 | then (start_line true; TMinus (get_current_line_type lexbuf)) | |
560 | else (patch_or_match PATCH; | |
561 | add_current_line_type D.MINUS; token lexbuf) } | |
562 | | "+" { pass_zero(); | |
563 | if !current_line_started | |
564 | then (start_line true; TPlus (get_current_line_type lexbuf)) | |
565 | else if !Data.in_meta | |
566 | then TPlus0 | |
567 | else (patch_or_match PATCH; | |
568 | add_current_line_type D.PLUS; token lexbuf) } | |
569 | | "?" { pass_zero(); | |
570 | if !current_line_started | |
571 | then (start_line true; TWhy (get_current_line_type lexbuf)) | |
572 | else if !Data.in_meta | |
573 | then TWhy0 | |
574 | else (add_current_line_type D.OPT; token lexbuf) } | |
575 | | "!" { pass_zero(); | |
576 | if !current_line_started | |
577 | then (start_line true; TBang (get_current_line_type lexbuf)) | |
578 | else if !Data.in_meta | |
579 | then TBang0 | |
580 | else (add_current_line_type D.UNIQUE; token lexbuf) } | |
aba5c457 | 581 | | "(" { if !Data.in_meta or not !col_zero |
34e49164 C |
582 | then (start_line true; TOPar (get_current_line_type lexbuf)) |
583 | else | |
584 | (start_line true; check_context_linetype (tok lexbuf); | |
585 | TOPar0 (get_current_line_type lexbuf))} | |
586 | | "\\(" { start_line true; TOPar0 (get_current_line_type lexbuf) } | |
587 | | "|" { if not (!col_zero) | |
588 | then (start_line true; TOr(get_current_line_type lexbuf)) | |
589 | else (start_line true; | |
590 | check_context_linetype (tok lexbuf); | |
591 | TMid0 (get_current_line_type lexbuf))} | |
592 | | "\\|" { start_line true; TMid0 (get_current_line_type lexbuf) } | |
593 | | ")" { if not !col_zero | |
594 | then (start_line true; TCPar (get_current_line_type lexbuf)) | |
595 | else | |
596 | (start_line true; check_context_linetype (tok lexbuf); | |
597 | TCPar0 (get_current_line_type lexbuf))} | |
598 | | "\\)" { start_line true; TCPar0 (get_current_line_type lexbuf) } | |
599 | ||
600 | | '[' { start_line true; TOCro (get_current_line_type lexbuf) } | |
601 | | ']' { start_line true; TCCro (get_current_line_type lexbuf) } | |
602 | | '{' { start_line true; TOBrace (get_current_line_type lexbuf) } | |
603 | | '}' { start_line true; TCBrace (get_current_line_type lexbuf) } | |
604 | ||
605 | | "->" { start_line true; TPtrOp (get_current_line_type lexbuf) } | |
606 | | '.' { start_line true; TDot (get_current_line_type lexbuf) } | |
607 | | ',' { start_line true; TComma (get_current_line_type lexbuf) } | |
608 | | ";" { start_line true; | |
609 | if !Data.in_meta | |
610 | then TMPtVirg (* works better with tokens_all *) | |
611 | else TPtVirg (get_current_line_type lexbuf) } | |
612 | ||
faf9a90c | 613 | |
34e49164 C |
614 | | '*' { pass_zero(); |
615 | if !current_line_started | |
616 | then | |
617 | (start_line true; TMul (get_current_line_type lexbuf)) | |
618 | else | |
619 | (patch_or_match MATCH; | |
620 | add_current_line_type D.MINUS; token lexbuf) } | |
621 | | '/' { start_line true; | |
faf9a90c | 622 | TDmOp (Ast.Div,get_current_line_type lexbuf) } |
34e49164 | 623 | | '%' { start_line true; |
faf9a90c C |
624 | TDmOp (Ast.Mod,get_current_line_type lexbuf) } |
625 | | '~' { start_line true; TTilde (get_current_line_type lexbuf) } | |
626 | ||
951c7801 C |
627 | | "++" { pass_zero(); |
628 | if !current_line_started | |
629 | then | |
630 | (start_line true; TInc (get_current_line_type lexbuf)) | |
631 | else (patch_or_match PATCH; | |
632 | add_current_line_type D.PLUSPLUS; token lexbuf) } | |
34e49164 | 633 | | "--" { start_line true; TDec (get_current_line_type lexbuf) } |
faf9a90c C |
634 | |
635 | | "=" { start_line true; TEq (get_current_line_type lexbuf) } | |
636 | ||
34e49164 C |
637 | | "-=" { start_line true; mkassign Ast.Minus lexbuf } |
638 | | "+=" { start_line true; mkassign Ast.Plus lexbuf } | |
faf9a90c | 639 | |
34e49164 C |
640 | | "*=" { start_line true; mkassign Ast.Mul lexbuf } |
641 | | "/=" { start_line true; mkassign Ast.Div lexbuf } | |
642 | | "%=" { start_line true; mkassign Ast.Mod lexbuf } | |
faf9a90c | 643 | |
34e49164 C |
644 | | "&=" { start_line true; mkassign Ast.And lexbuf } |
645 | | "|=" { start_line true; mkassign Ast.Or lexbuf } | |
646 | | "^=" { start_line true; mkassign Ast.Xor lexbuf } | |
faf9a90c | 647 | |
34e49164 C |
648 | | "<<=" { start_line true; mkassign Ast.DecLeft lexbuf } |
649 | | ">>=" { start_line true; mkassign Ast.DecRight lexbuf } | |
650 | ||
651 | | ":" { start_line true; TDotDot (get_current_line_type lexbuf) } | |
faf9a90c | 652 | |
951c7801 C |
653 | | "==" { start_line true; TEqEq (get_current_line_type lexbuf) } |
654 | | "!=" { start_line true; TNotEq (get_current_line_type lexbuf) } | |
34e49164 C |
655 | | ">=" { start_line true; |
656 | TLogOp(Ast.SupEq,get_current_line_type lexbuf) } | |
657 | | "<=" { start_line true; | |
5636bb2c C |
658 | if !Data.in_meta |
659 | then TSub(get_current_line_type lexbuf) | |
660 | else TLogOp(Ast.InfEq,get_current_line_type lexbuf) } | |
34e49164 | 661 | | "<" { start_line true; |
faf9a90c | 662 | TLogOp(Ast.Inf,get_current_line_type lexbuf) } |
34e49164 C |
663 | | ">" { start_line true; |
664 | TLogOp(Ast.Sup,get_current_line_type lexbuf) } | |
faf9a90c C |
665 | |
666 | | "&&" { start_line true; TAndLog (get_current_line_type lexbuf) } | |
34e49164 | 667 | | "||" { start_line true; TOrLog (get_current_line_type lexbuf) } |
faf9a90c | 668 | |
34e49164 | 669 | | ">>" { start_line true; |
413ffc02 | 670 | TShROp(Ast.DecRight,get_current_line_type lexbuf) } |
34e49164 | 671 | | "<<" { start_line true; |
413ffc02 | 672 | TShLOp(Ast.DecLeft,get_current_line_type lexbuf) } |
faf9a90c | 673 | |
34e49164 C |
674 | | "&" { start_line true; TAnd (get_current_line_type lexbuf) } |
675 | | "^" { start_line true; TXor(get_current_line_type lexbuf) } | |
676 | ||
978fd7e5 | 677 | | "##" { start_line true; TCppConcatOp } |
708f4980 | 678 | | (( ("#" [' ' '\t']* "define" [' ' '\t']+)) as def) |
faf9a90c | 679 | ( (letter (letter |digit)*) as ident) |
34e49164 C |
680 | { start_line true; |
681 | let (arity,line,lline,offset,col,strbef,straft,pos) as lt = | |
682 | get_current_line_type lexbuf in | |
708f4980 | 683 | let off = String.length def in |
34e49164 C |
684 | (* -1 in the code below because the ident is not at the line start *) |
685 | TDefine | |
686 | (lt, | |
687 | check_var ident | |
708f4980 C |
688 | (arity,line,lline,offset+off,col+off,[],[],Ast0.NoMetaPos)) } |
689 | | (( ("#" [' ' '\t']* "define" [' ' '\t']+)) as def) | |
faf9a90c | 690 | ( (letter (letter | digit)*) as ident) |
34e49164 C |
691 | '(' |
692 | { start_line true; | |
693 | let (arity,line,lline,offset,col,strbef,straft,pos) as lt = | |
694 | get_current_line_type lexbuf in | |
708f4980 | 695 | let off = String.length def in |
34e49164 C |
696 | TDefineParam |
697 | (lt, | |
698 | check_var ident | |
699 | (* why pos here but not above? *) | |
708f4980 C |
700 | (arity,line,lline,offset+off,col+off,strbef,straft,pos), |
701 | offset + off + (String.length ident), | |
702 | col + off + (String.length ident)) } | |
34e49164 C |
703 | | "#" [' ' '\t']* "include" [' ' '\t']* '"' [^ '"']+ '"' |
704 | { TIncludeL | |
705 | (let str = tok lexbuf in | |
706 | let start = String.index str '"' in | |
707 | let finish = String.rindex str '"' in | |
708 | start_line true; | |
709 | (process_include start finish str,get_current_line_type lexbuf)) } | |
710 | | "#" [' ' '\t']* "include" [' ' '\t']* '<' [^ '>']+ '>' | |
711 | { TIncludeNL | |
712 | (let str = tok lexbuf in | |
713 | let start = String.index str '<' in | |
714 | let finish = String.rindex str '>' in | |
715 | start_line true; | |
716 | (process_include start finish str,get_current_line_type lexbuf)) } | |
717 | | "#" [' ' '\t']* "if" [^'\n']* | |
718 | | "#" [' ' '\t']* "ifdef" [^'\n']* | |
719 | | "#" [' ' '\t']* "ifndef" [^'\n']* | |
720 | | "#" [' ' '\t']* "else" [^'\n']* | |
721 | | "#" [' ' '\t']* "elif" [^'\n']* | |
722 | | "#" [' ' '\t']* "endif" [^'\n']* | |
723 | | "#" [' ' '\t']* "error" [^'\n']* | |
724 | { start_line true; check_plus_linetype (tok lexbuf); | |
c3e37e97 | 725 | TPragma (Ast.Noindent(tok lexbuf), get_current_line_type lexbuf) } |
0708f913 C |
726 | | "/*" |
727 | { start_line true; check_plus_linetype (tok lexbuf); | |
728 | (* second argument to TPragma is not quite right, because | |
aa721442 | 729 | it represents only the first token of the comment, but that |
0708f913 | 730 | should be good enough *) |
c3e37e97 C |
731 | TPragma (Ast.Indent("/*"^(comment lexbuf)), |
732 | get_current_line_type lexbuf) } | |
34e49164 C |
733 | | "---" [^'\n']* |
734 | { (if !current_line_started | |
735 | then lexerr "--- must be at the beginning of the line" ""); | |
736 | start_line true; | |
737 | TMinusFile | |
738 | (let str = tok lexbuf in | |
739 | (drop_spaces(String.sub str 3 (String.length str - 3)), | |
740 | (get_current_line_type lexbuf))) } | |
741 | | "+++" [^'\n']* | |
742 | { (if !current_line_started | |
743 | then lexerr "+++ must be at the beginning of the line" ""); | |
744 | start_line true; | |
745 | TPlusFile | |
746 | (let str = tok lexbuf in | |
747 | (drop_spaces(String.sub str 3 (String.length str - 3)), | |
748 | (get_current_line_type lexbuf))) } | |
749 | ||
750 | | letter (letter | digit)* | |
faf9a90c | 751 | { start_line true; id_tokens lexbuf } |
34e49164 C |
752 | |
753 | | "'" { start_line true; | |
754 | TChar(char lexbuf,get_current_line_type lexbuf) } | |
755 | | '"' { start_line true; | |
756 | TString(string lexbuf,(get_current_line_type lexbuf)) } | |
757 | | (real as x) { start_line true; | |
758 | TFloat(x,(get_current_line_type lexbuf)) } | |
faf9a90c C |
759 | | ((( decimal | hexa | octal) |
760 | ( ['u' 'U'] | |
761 | | ['l' 'L'] | |
34e49164 C |
762 | | (['l' 'L'] ['u' 'U']) |
763 | | (['u' 'U'] ['l' 'L']) | |
764 | | (['u' 'U'] ['l' 'L'] ['l' 'L']) | |
765 | | (['l' 'L'] ['l' 'L']) | |
766 | )? | |
767 | ) as x) { start_line true; TInt(x,(get_current_line_type lexbuf)) } | |
768 | ||
769 | | "<=>" { TIso } | |
770 | | "=>" { TRightIso } | |
771 | ||
772 | | eof { EOF } | |
773 | ||
774 | | _ { lexerr "unrecognised symbol, in token rule: " (tok lexbuf) } | |
775 | ||
776 | ||
777 | and char = parse | |
778 | | (_ as x) "'" { String.make 1 x } | |
779 | | (("\\" (oct | oct oct | oct oct oct)) as x "'") { x } | |
780 | | (("\\x" (hex | hex hex)) as x "'") { x } | |
781 | | (("\\" (_ as v)) as x "'") | |
782 | { (match v with | |
783 | | 'n' -> () | 't' -> () | 'v' -> () | 'b' -> () | |
784 | | 'r' -> () | 'f' -> () | 'a' -> () | |
785 | | '\\' -> () | '?' -> () | '\'' -> () | '"' -> () | |
786 | | 'e' -> () | |
787 | | _ -> lexerr "unrecognised symbol: " (tok lexbuf) | |
788 | ); | |
789 | x | |
faf9a90c | 790 | } |
34e49164 C |
791 | | _ { lexerr "unrecognised symbol: " (tok lexbuf) } |
792 | ||
793 | and string = parse | |
794 | | '"' { "" } | |
795 | | (_ as x) { Common.string_of_char x ^ string lexbuf } | |
796 | | ("\\" (oct | oct oct | oct oct oct)) as x { x ^ string lexbuf } | |
797 | | ("\\x" (hex | hex hex)) as x { x ^ string lexbuf } | |
faf9a90c C |
798 | | ("\\" (_ as v)) as x |
799 | { | |
34e49164 | 800 | (match v with |
9f8e26f4 C |
801 | | 'n' -> () | 't' -> () | 'v' -> () | 'b' -> () | 'r' -> () |
802 | | 'f' -> () | 'a' -> () | |
803 | | '\\' -> () | '?' -> () | '\'' -> () | '"' -> () | |
804 | | 'e' -> () | |
805 | | '\n' -> () | |
806 | | '(' -> () | '|' -> () | ')' -> () | |
807 | | _ -> lexerr "unrecognised symbol:" (tok lexbuf) | |
34e49164 C |
808 | ); |
809 | x ^ string lexbuf | |
810 | } | |
811 | | _ { lexerr "unrecognised symbol: " (tok lexbuf) } | |
0708f913 C |
812 | |
813 | and comment = parse | |
aa721442 | 814 | | "*/" { let s = tok lexbuf in check_comment s; start_line true; s } |
0708f913 | 815 | | ['\n' '\r' '\011' '\012'] |
aa721442 C |
816 | { let s = tok lexbuf in |
817 | (* even blank line should have a + *) | |
818 | check_comment s; | |
819 | reset_line lexbuf; s ^ comment lexbuf } | |
0708f913 C |
820 | | "+" { pass_zero(); |
821 | if !current_line_started | |
822 | then (start_line true; let s = tok lexbuf in s^(comment lexbuf)) | |
aa721442 | 823 | else (start_line true; comment lexbuf) } |
0708f913 | 824 | (* noteopti: *) |
aa721442 C |
825 | | [^ '*'] |
826 | { let s = tok lexbuf in | |
827 | check_comment s; start_line true; s ^ comment lexbuf } | |
828 | | [ '*'] | |
829 | { let s = tok lexbuf in | |
830 | check_comment s; start_line true; s ^ comment lexbuf } | |
951c7801 | 831 | | _ |
0708f913 C |
832 | { start_line true; let s = tok lexbuf in |
833 | Common.pr2 ("LEXER: unrecognised symbol in comment:"^s); | |
834 | s ^ comment lexbuf | |
835 | } | |
836 |