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28bf4b0b | 1 | /* |
2 | ** LCLint - annotation-assisted static program checker | |
3 | ** Copyright (C) 1994-2001 University of Virginia, | |
4 | ** Massachusetts Institute of Technology | |
5 | ** | |
6 | ** This program is free software; you can redistribute it and/or modify it | |
7 | ** under the terms of the GNU General Public License as published by the | |
8 | ** Free Software Foundation; either version 2 of the License, or (at your | |
9 | ** option) any later version. | |
10 | ** | |
11 | ** This program is distributed in the hope that it will be useful, but | |
12 | ** WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | ** General Public License for more details. | |
15 | ** | |
16 | ** The GNU General Public License is available from http://www.gnu.org/ or | |
17 | ** the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
18 | ** MA 02111-1307, USA. | |
19 | ** | |
20 | ** For information on lclint: lclint-request@cs.virginia.edu | |
21 | ** To report a bug: lclint-bug@cs.virginia.edu | |
22 | ** For more information: http://lclint.cs.virginia.edu | |
23 | */ | |
24 | /* | |
25 | ** mtContextNode.c | |
26 | */ | |
27 | ||
28 | # include "lclintMacros.nf" | |
29 | # include "basic.h" | |
30 | # include "mtgrammar.h" | |
31 | ||
32 | static bool mtContextNode_matchesType (mtContextNode, ctype) /*@*/ ; | |
33 | ||
34 | static /*@observer@*/ cstring mtContextKind_unparse (mtContextKind ck) | |
35 | { | |
36 | switch (ck) | |
37 | { | |
38 | case MTC_ANY: return cstring_makeLiteralTemp ("any"); | |
39 | case MTC_PARAM: return cstring_makeLiteralTemp ("param"); | |
b072092f | 40 | case MTC_RESULT: return cstring_makeLiteralTemp ("result"); |
28bf4b0b | 41 | case MTC_REFERENCE: return cstring_makeLiteralTemp ("reference"); |
42 | case MTC_CLAUSE: return cstring_makeLiteralTemp ("clause"); | |
43 | } | |
44 | ||
45 | BADBRANCH; | |
46 | } | |
47 | ||
48 | static mtContextNode mtContextNode_create (mtContextKind context, ctype ct) | |
49 | { | |
50 | mtContextNode res = (mtContextNode) dmalloc (sizeof (*res)); | |
51 | res->context = context; | |
52 | res->type = ct; | |
53 | DPRINTF (("Create: %s", mtContextNode_unparse (res))); | |
54 | return res; | |
55 | } | |
56 | ||
57 | extern mtContextNode mtContextNode_createAny () | |
58 | { | |
59 | return mtContextNode_create (MTC_ANY, ctype_unknown); | |
60 | } | |
61 | ||
62 | extern mtContextNode mtContextNode_createParameter (ctype ct) | |
63 | { | |
64 | return mtContextNode_create (MTC_PARAM, ct); | |
65 | } | |
66 | ||
b072092f | 67 | extern mtContextNode mtContextNode_createResult (ctype ct) |
68 | { | |
69 | return mtContextNode_create (MTC_RESULT, ct); | |
70 | } | |
71 | ||
28bf4b0b | 72 | extern mtContextNode mtContextNode_createReference (ctype ct) |
73 | { | |
74 | return mtContextNode_create (MTC_REFERENCE, ct); | |
75 | } | |
76 | ||
77 | extern mtContextNode mtContextNode_createClause (ctype ct) | |
78 | { | |
79 | return mtContextNode_create (MTC_CLAUSE, ct); | |
80 | } | |
81 | ||
82 | extern void mtContextNode_free (/*@only@*/ mtContextNode node) | |
83 | { | |
84 | sfree (node); | |
85 | } | |
86 | ||
87 | bool mtContextNode_matchesEntry (mtContextNode context, uentry ue) | |
88 | { | |
89 | ctype ct; | |
90 | ||
91 | llassert (mtContextNode_isDefined (context)); | |
92 | ||
93 | DPRINTF (("Matches context: %s / %s", | |
94 | mtContextNode_unparse (context), uentry_unparse (ue))); | |
95 | ||
96 | switch (context->context) | |
97 | { | |
98 | case MTC_ANY: break; /* everything matches */ | |
b072092f | 99 | case MTC_RESULT: |
100 | if (!uentry_isFunction (ue)) | |
101 | { | |
102 | return FALSE; | |
103 | } | |
104 | break; | |
28bf4b0b | 105 | case MTC_PARAM: |
106 | if (!uentry_isParam (ue)) | |
107 | { | |
108 | return FALSE; | |
109 | } | |
110 | break; | |
111 | case MTC_REFERENCE: | |
112 | break; | |
113 | case MTC_CLAUSE: | |
114 | BADBRANCH; | |
115 | } | |
116 | ||
117 | if (uentry_isFunction (ue)) | |
118 | { | |
119 | ct = ctype_getReturnType (uentry_getType (ue)); | |
120 | } | |
121 | else | |
122 | { | |
123 | ct = uentry_getType (ue); | |
124 | } | |
125 | ||
126 | return mtContextNode_matchesType (context, ct); | |
127 | } | |
128 | ||
129 | bool mtContextNode_matchesRef (mtContextNode context, sRef sr) | |
130 | { | |
131 | ctype ct; | |
132 | ||
133 | llassert (mtContextNode_isDefined (context)); | |
134 | ||
135 | DPRINTF (("Matches context: %s / %s", | |
136 | mtContextNode_unparse (context), sRef_unparse (sr))); | |
137 | ||
138 | switch (context->context) | |
139 | { | |
140 | case MTC_ANY: break; /* everything matches */ | |
b072092f | 141 | case MTC_RESULT: |
142 | DPRINTF (("Result? %s / %s", | |
143 | sRef_unparseFull (sr), | |
144 | bool_unparse (sRef_isResult (sr)))); | |
145 | return sRef_isResult (sr); | |
28bf4b0b | 146 | case MTC_PARAM: |
147 | if (!sRef_isParam (sr)) | |
148 | { | |
149 | return FALSE; | |
150 | } | |
151 | break; | |
152 | case MTC_REFERENCE: | |
153 | break; | |
154 | case MTC_CLAUSE: | |
155 | BADBRANCH; | |
156 | } | |
157 | ||
158 | ct = sRef_getType (sr); | |
159 | return mtContextNode_matchesType (context, ct); | |
160 | } | |
161 | ||
162 | bool mtContextNode_matchesRefStrict (mtContextNode context, sRef s) | |
163 | { | |
164 | if (mtContextNode_matchesRef (context, s)) | |
165 | { | |
166 | if (ctype_isKnown (context->type) | |
167 | && (ctype_isUnknown (sRef_getType (s)) | |
168 | || ctype_isVoidPointer (sRef_getType (s)))) | |
169 | { | |
170 | return FALSE; | |
171 | } | |
172 | else | |
173 | { | |
174 | return TRUE; | |
175 | } | |
176 | } | |
177 | ||
178 | return FALSE; | |
179 | } | |
180 | ||
181 | bool mtContextNode_matchesType (mtContextNode context, ctype ct) | |
182 | { | |
183 | DPRINTF (("Context type...")); | |
184 | ||
185 | if (!ctype_match (context->type, ct)) | |
186 | { | |
187 | DPRINTF (("Type mismatch: %s / %s", | |
188 | ctype_unparse (context->type), | |
189 | ctype_unparse (ct))); | |
190 | return FALSE; | |
191 | } | |
192 | else | |
193 | { | |
194 | DPRINTF (("Type okay: %s / %s", | |
195 | ctype_unparse (context->type), | |
196 | ctype_unparse (ct))); | |
197 | } | |
198 | ||
199 | return TRUE; | |
200 | } | |
201 | ||
202 | cstring mtContextNode_unparse (mtContextNode node) | |
203 | { | |
204 | if (ctype_isKnown (node->type)) | |
205 | { | |
206 | return message ("%s %s", mtContextKind_unparse (node->context), | |
207 | ctype_unparse (node->type)); | |
208 | } | |
209 | else | |
210 | { | |
211 | return message ("%s", mtContextKind_unparse (node->context)); | |
212 | } | |
213 | } | |
214 | ||
215 | bool mtContextNode_isClause (mtContextNode n) | |
216 | { | |
217 | llassert (mtContextNode_isDefined (n)); | |
218 | return (n->context == MTC_CLAUSE); | |
219 | } | |
220 | ||
221 | bool mtContextNode_isParameter (mtContextNode n) | |
222 | { | |
223 | llassert (mtContextNode_isDefined (n)); | |
224 | return (n->context == MTC_PARAM); | |
225 | } | |
226 | ||
b072092f | 227 | bool mtContextNode_isReference (mtContextNode n) |
28bf4b0b | 228 | { |
229 | llassert (mtContextNode_isDefined (n)); | |
230 | return (n->context == MTC_REFERENCE); | |
231 | } | |
232 | ||
b072092f | 233 | bool mtContextNode_isResult (mtContextNode n) |
234 | { | |
235 | llassert (mtContextNode_isDefined (n)); | |
236 | return (n->context == MTC_RESULT); | |
237 | } | |
238 | ||
28bf4b0b | 239 | |
240 | ||
241 |