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3814599d | 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 | ** functionConstraint.c | |
26 | */ | |
27 | ||
28 | # include "lclintMacros.nf" | |
29 | # include "basic.h" | |
3814599d | 30 | |
31 | static /*@only@*/ /*@notnull@*/ /*@special@*/ functionConstraint /*@i32 need special? @*/ | |
32 | functionConstraint_alloc (functionConstraintKind kind) /*@defines result->kind@*/ | |
33 | { | |
34 | functionConstraint res = (functionConstraint) dmalloc (sizeof (*res)); | |
35 | ||
36 | res->kind = kind; | |
37 | return res; | |
38 | } | |
39 | ||
40 | extern functionConstraint functionConstraint_createBufferConstraint (constraintList buf) | |
41 | { | |
42 | functionConstraint res = functionConstraint_alloc (FCT_BUFFER); | |
43 | res->constraint.buffer = buf; | |
44 | return res; | |
45 | } | |
46 | ||
47 | extern functionConstraint functionConstraint_createMetaStateConstraint (metaStateConstraint msc) | |
48 | { | |
49 | functionConstraint res = functionConstraint_alloc (FCT_METASTATE); | |
50 | res->constraint.metastate = msc; | |
51 | return res; | |
52 | } | |
53 | ||
ba45e1e4 | 54 | extern functionConstraint functionConstraint_conjoin (functionConstraint f1, functionConstraint f2) |
55 | { | |
56 | functionConstraint res = functionConstraint_alloc (FCT_CONJUNCT); | |
57 | res->constraint.conjunct.op1 = f1; | |
58 | res->constraint.conjunct.op2 = f2; | |
59 | DPRINTF (("Conjoining ==> %s", | |
60 | functionConstraint_unparse (res))); | |
61 | return res; | |
62 | } | |
63 | ||
3814599d | 64 | /*@only@*/ cstring functionConstraint_unparse (functionConstraint p) |
65 | { | |
66 | if (functionConstraint_isDefined (p)) | |
67 | { | |
68 | switch (p->kind) | |
69 | { | |
70 | case FCT_BUFFER: | |
71 | return constraintList_unparse (p->constraint.buffer); | |
72 | case FCT_METASTATE: | |
73 | return metaStateConstraint_unparse (p->constraint.metastate); | |
ba45e1e4 | 74 | case FCT_CONJUNCT: |
75 | return message ("%q /\\ %q", | |
76 | functionConstraint_unparse (p->constraint.conjunct.op1), | |
77 | functionConstraint_unparse (p->constraint.conjunct.op2)); | |
3814599d | 78 | BADDEFAULT; |
79 | } | |
80 | BADBRANCH; | |
81 | } | |
82 | else | |
83 | { | |
84 | return cstring_makeLiteral ("< empty constraint >"); | |
85 | } | |
86 | } | |
87 | ||
88 | extern constraintList functionConstraint_getBufferConstraint (functionConstraint node) | |
89 | { | |
90 | llassert (functionConstraint_isDefined (node)); | |
ba45e1e4 | 91 | |
92 | if (node->kind == FCT_CONJUNCT) | |
93 | { | |
94 | if (functionConstraint_hasBufferConstraint (node->constraint.conjunct.op1)) | |
95 | { | |
96 | return functionConstraint_getBufferConstraint (node->constraint.conjunct.op1); | |
97 | } | |
98 | else | |
99 | { | |
100 | llassert (functionConstraint_hasBufferConstraint (node->constraint.conjunct.op2)); | |
101 | return functionConstraint_getBufferConstraint (node->constraint.conjunct.op2); | |
102 | } | |
103 | } | |
104 | ||
3814599d | 105 | llassert (node->kind == FCT_BUFFER); |
106 | return node->constraint.buffer; | |
107 | } | |
108 | ||
109 | extern metaStateConstraint functionConstraint_getMetaStateConstraint (functionConstraint node) | |
110 | { | |
111 | llassert (functionConstraint_isDefined (node)); | |
ba45e1e4 | 112 | |
113 | if (node->kind == FCT_CONJUNCT) | |
114 | { | |
115 | if (functionConstraint_hasMetaStateConstraint (node->constraint.conjunct.op1)) | |
116 | { | |
117 | return functionConstraint_getMetaStateConstraint (node->constraint.conjunct.op1); | |
118 | } | |
119 | else | |
120 | { | |
121 | llassert (functionConstraint_hasMetaStateConstraint (node->constraint.conjunct.op2)); | |
122 | return functionConstraint_getMetaStateConstraint (node->constraint.conjunct.op2); | |
123 | } | |
124 | } | |
125 | ||
3814599d | 126 | llassert (node->kind == FCT_METASTATE); |
127 | return node->constraint.metastate; | |
128 | } | |
129 | ||
130 | extern bool functionConstraint_hasBufferConstraint (functionConstraint node) | |
131 | { | |
ba45e1e4 | 132 | if (functionConstraint_isDefined (node)) |
133 | { | |
134 | return node->kind == FCT_BUFFER | |
135 | || (node->kind == FCT_CONJUNCT | |
136 | && (functionConstraint_hasBufferConstraint (node->constraint.conjunct.op1) | |
137 | || functionConstraint_hasBufferConstraint (node->constraint.conjunct.op2))); | |
138 | } | |
139 | else | |
140 | { | |
141 | return FALSE; | |
142 | } | |
143 | } | |
144 | ||
145 | extern bool functionConstraint_hasMetaStateConstraint (functionConstraint node) | |
146 | { | |
147 | if (functionConstraint_isDefined (node)) | |
148 | { | |
149 | return node->kind == FCT_METASTATE | |
150 | || (node->kind == FCT_CONJUNCT | |
151 | && (functionConstraint_hasMetaStateConstraint (node->constraint.conjunct.op1) | |
152 | || functionConstraint_hasMetaStateConstraint (node->constraint.conjunct.op2))); | |
153 | } | |
154 | else | |
155 | { | |
156 | return FALSE; | |
157 | } | |
3814599d | 158 | } |
159 | ||
160 | extern functionConstraint functionConstraint_copy (functionConstraint node) | |
161 | { | |
162 | if (functionConstraint_isDefined (node)) | |
163 | { | |
164 | switch (node->kind) | |
165 | { | |
166 | case FCT_BUFFER: | |
167 | return functionConstraint_createBufferConstraint (constraintList_copy (node->constraint.buffer)); | |
168 | case FCT_METASTATE: | |
169 | return functionConstraint_createMetaStateConstraint (metaStateConstraint_copy (node->constraint.metastate)); | |
ba45e1e4 | 170 | case FCT_CONJUNCT: |
171 | return functionConstraint_conjoin (functionConstraint_copy (node->constraint.conjunct.op1), | |
172 | functionConstraint_copy (node->constraint.conjunct.op2)); | |
3814599d | 173 | } |
174 | ||
175 | BADBRANCH; | |
176 | } | |
177 | else | |
178 | { | |
179 | return functionConstraint_undefined; | |
180 | } | |
181 | } | |
182 | ||
183 | extern void functionConstraint_free (/*@only@*/ functionConstraint node) | |
184 | { | |
185 | if (functionConstraint_isDefined (node)) | |
186 | { | |
187 | switch (node->kind) | |
188 | { | |
189 | case FCT_BUFFER: | |
190 | constraintList_free (node->constraint.buffer); | |
191 | break; | |
192 | case FCT_METASTATE: | |
193 | metaStateConstraint_free (node->constraint.metastate); | |
194 | break; | |
ba45e1e4 | 195 | case FCT_CONJUNCT: |
196 | functionConstraint_free (node->constraint.conjunct.op1); | |
197 | functionConstraint_free (node->constraint.conjunct.op2); | |
3120b462 | 198 | break; |
199 | BADDEFAULT; | |
3814599d | 200 | } |
201 | ||
202 | sfree (node); | |
203 | } | |
204 | } | |
ba45e1e4 | 205 | |
206 | ||
207 | ||
208 | ||
209 | ||
210 | ||
211 | ||
212 | ||
213 |