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1 | (* |
2 | * Copyright 2005-2008, Ecole des Mines de Nantes, University of Copenhagen | |
3 | * Yoann Padioleau, Julia Lawall, Rene Rydhof Hansen, Henrik Stuart, Gilles Muller | |
4 | * This file is part of Coccinelle. | |
5 | * | |
6 | * Coccinelle is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, according to version 2 of the License. | |
9 | * | |
10 | * Coccinelle is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with Coccinelle. If not, see <http://www.gnu.org/licenses/>. | |
17 | * | |
18 | * The authors reserve the right to distribute this or future versions of | |
19 | * Coccinelle under other licenses. | |
20 | *) | |
21 | ||
22 | ||
23 | (* for metavariables in general, but here because needed for metatypes *) | |
24 | type inherited = bool (* true if inherited *) | |
25 | type keep_binding = Unitary (* need no info *) | |
26 | | Nonunitary (* need an env entry *) | Saved (* need a witness *) | |
27 | ||
28 | type typeC = | |
29 | ConstVol of const_vol * typeC | |
30 | | BaseType of baseType * sign option | |
31 | | Pointer of typeC | |
32 | | FunctionPointer of typeC (* only return type *) | |
33 | | Array of typeC (* drop size info *) | |
34 | | StructUnionName of structUnion * bool (* true if a metaId *) * string | |
35 | | TypeName of string | |
36 | | MetaType of (string * string) * keep_binding * inherited | |
37 | | Unknown (* for metavariables of type expression *^* *) | |
38 | ||
39 | and tagged_string = string | |
40 | ||
41 | and baseType = VoidType | CharType | ShortType | IntType | DoubleType | |
42 | | FloatType | LongType | BoolType | |
43 | ||
44 | and structUnion = Struct | Union | |
45 | ||
46 | and sign = Signed | Unsigned | |
47 | ||
48 | and const_vol = Const | Volatile | |
49 | ||
50 | (* --------------------------------------------------------------------- *) | |
51 | (* Printer *) | |
52 | open Format | |
53 | ||
54 | let rec typeC = function | |
55 | ConstVol(cv,ty) -> const_vol cv; typeC ty | |
56 | | BaseType(ty,None) -> baseType ty | |
57 | | BaseType(ty,Some sgn) -> sign sgn; baseType ty | |
58 | | Pointer(ty) -> typeC ty; print_string "*" | |
59 | | FunctionPointer(ty) -> typeC ty; print_string "(*)(...)" | |
60 | | Array(ty) -> typeC ty; print_string "[] " | |
61 | | StructUnionName(kind,mv,name) -> | |
62 | structUnion kind; print_string name; print_string " " | |
63 | | TypeName(name) -> print_string name; print_string " " | |
64 | | MetaType((rule,name),keep,inherited) -> | |
65 | print_string "<"; print_string name; print_string ">"; print_string " "; | |
66 | (* | |
67 | let print_unitary = function | |
68 | Unitary -> print_string "unitary" | |
69 | | Nonunitary -> print_string "nonunitary" | |
70 | | Saved -> print_string "saved" in | |
71 | print_string "/* "; | |
72 | print_string "keep:"; print_unitary keep; | |
73 | print_string " inherited:"; print_bool inherited; | |
74 | print_string " */" | |
75 | *) | |
76 | | Unknown -> print_string "unknown " | |
77 | ||
78 | and baseType = function | |
79 | VoidType -> print_string "void " | |
80 | | CharType -> print_string "char " | |
81 | | ShortType -> print_string "short " | |
82 | | IntType -> print_string "int " | |
83 | | DoubleType -> print_string "double " | |
84 | | FloatType -> print_string "float " | |
85 | | LongType -> print_string "long " | |
86 | | BoolType -> print_string "bool " | |
87 | ||
88 | and structUnion = function | |
89 | Struct -> print_string "struct " | |
90 | | Union -> print_string "union " | |
91 | ||
92 | and sign = function | |
93 | Signed -> print_string "signed " | |
94 | | Unsigned -> print_string "unsigned " | |
95 | ||
96 | and const_vol = function | |
97 | Const -> print_string "const " | |
98 | | Volatile -> print_string "volatile " | |
99 | ||
100 | (* t1 should be less informative than t1, eg t1 = Pointer(Unknown) and t2 = | |
101 | Pointer(int) *) | |
102 | (* only used in iso *) | |
103 | (* needs to do something for MetaType *) | |
104 | let compatible t1 = function | |
105 | None -> t1 = Unknown | |
106 | | Some t2 -> | |
107 | let rec loop = function | |
108 | (Unknown,_) -> true | |
109 | | (ConstVol(cv1,ty1),ConstVol(cv2,ty2)) when cv1 = cv2 -> | |
110 | loop(ty1,ty2) | |
111 | | (Pointer(ty1),Pointer(ty2)) -> loop(ty1,ty2) | |
112 | | (FunctionPointer(ty1),_) -> false (* not enough info *) | |
113 | | (_,FunctionPointer(ty2)) -> false (* not enough info *) | |
114 | | (Array(ty1),Array(ty2)) -> loop(ty1,ty2) | |
115 | | (_,_) -> t1=t2 in | |
116 | loop (t1,t2) | |
117 |