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616915dd | 1 | /* |
2 | ** LCLint - annotation-assisted static program checker | |
3 | ** Copyright (C) 1994-2000 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 | ** tokentable.c | |
26 | ** | |
27 | ** Larch processors token table | |
28 | ** This table stores predefined tokens for LCL. | |
29 | */ | |
30 | ||
31 | # include "lclintMacros.nf" | |
32 | # include "llbasic.h" | |
33 | # include "lcltokentable.h" | |
34 | ||
35 | static long unsigned MaxToken; | |
36 | static /*@only@*/ /*@null@*/ o_ltoken *LCLTokenTable = NULL; | |
37 | ||
38 | static void AllocTokenTable (void) | |
39 | /*@globals LCLTokenTable@*/ | |
40 | /*@modifies LCLTokenTable, MaxToken@*/; | |
41 | ||
42 | ltoken | |
43 | LCLInsertToken (ltokenCode cod, lsymbol sym, lsymbol rTxt, | |
44 | bool isPredefined) | |
45 | { | |
46 | /* | |
47 | ** If the token is already in the token table, it is returned. Otherwise, | |
48 | ** the token is inserted into the table and then returned. | |
49 | ** | |
50 | ** A new TokenTable is allocated when: | |
51 | ** . The TokenTable[] is empty (initial case) | |
52 | ** . The location where to insert the token is not in TokenTable[] | |
53 | */ | |
54 | ||
55 | setCodePoint (); | |
56 | ||
57 | while (sym >= MaxToken) | |
58 | { | |
59 | setCodePoint (); | |
60 | /* No more space available. Allocate more. */ | |
61 | AllocTokenTable (); | |
62 | } | |
63 | ||
64 | llassert (LCLTokenTable != NULL); | |
65 | ||
66 | if (ltoken_isUndefined (LCLTokenTable[sym])) | |
67 | { | |
68 | LCLTokenTable[sym] = ltoken_create (cod, sym); | |
69 | ltoken_setRawText (LCLTokenTable[sym], rTxt); | |
70 | ltoken_setDefined (LCLTokenTable[sym], isPredefined); | |
71 | return LCLTokenTable[sym]; | |
72 | } | |
73 | ||
74 | return LCLTokenTable[sym]; | |
75 | } | |
76 | ||
77 | void LCLUpdateToken (ltokenCode cod, lsymbol sym, bool def) | |
78 | { | |
79 | llassert (LCLTokenTable != NULL); | |
80 | ||
81 | if (!ltoken_isUndefined (LCLTokenTable[sym])) | |
82 | { | |
83 | ltoken_setCode (LCLTokenTable[sym], cod); | |
84 | ltoken_setDefined (LCLTokenTable[sym], def); | |
85 | } | |
86 | else | |
87 | { | |
88 | llfatalbug (message ("LCLUpdateToken: %s", | |
89 | cstring_fromChars (lsymbol_toChars (sym)))); | |
90 | } | |
91 | } | |
92 | ||
93 | void LCLSetTokenHasSyn (lsymbol sym, bool syn) | |
94 | { | |
95 | llassert (LCLTokenTable != NULL); | |
96 | ||
97 | if (!ltoken_isUndefined (LCLTokenTable[sym])) | |
98 | { | |
99 | ltoken_setHasSyn (LCLTokenTable[sym], syn); | |
100 | } | |
101 | else | |
102 | { | |
103 | llfatalbug (message ("LCLSetTokenHasSyn: null token (%d)", (int)sym)); | |
104 | } | |
105 | } | |
106 | ||
107 | ltoken LCLGetToken (lsymbol sym) | |
108 | { | |
109 | llassert (LCLTokenTable != NULL); | |
110 | llassert (sym < MaxToken); | |
111 | ||
112 | return LCLTokenTable[sym]; | |
113 | } | |
114 | ||
115 | #if 0 | |
116 | bool LCLTokenTableContainsToken (ltoken tok) | |
117 | { | |
118 | unsigned long i; | |
119 | ||
120 | if (LCLTokenTable != NULL) { | |
121 | for (i = 0; i < MaxToken; i++) { | |
122 | if (LCLTokenTable[i] == tok) { | |
123 | return TRUE; | |
124 | } | |
125 | } | |
126 | } | |
127 | ||
128 | return FALSE; | |
129 | } | |
130 | # endif | |
131 | ||
132 | /*@exposed@*/ ltoken | |
133 | LCLReserveToken (ltokenCode cod, char *txt) | |
134 | { | |
135 | /* | |
136 | ** The same context that was active when the string-handle | |
137 | ** was derived by a previous call to lsymbol_fromChars (), | |
138 | ** must be established. | |
139 | */ | |
140 | lsymbol sym; | |
141 | ||
142 | setCodePoint (); | |
143 | sym = lsymbol_fromChars (txt); | |
144 | ||
145 | /* | |
146 | ** Reserved tokens never have raw text like synonyms. | |
147 | */ | |
148 | ||
149 | return (LCLInsertToken (cod, sym, lsymbol_undefined, TRUE)); | |
150 | } | |
151 | ||
152 | static void | |
153 | AllocTokenTable (void) /*@globals LCLTokenTable; @*/ | |
154 | { | |
155 | long unsigned oldSize, newSize; | |
156 | long unsigned int i; | |
157 | ||
158 | oldSize = MaxToken; | |
159 | ||
160 | if (oldSize == 0) | |
161 | { | |
162 | newSize = INITTOKENTABLE; | |
163 | llassert (LCLTokenTable == NULL); | |
164 | LCLTokenTable = (ltoken *) dmalloc (newSize * sizeof (*LCLTokenTable)); | |
165 | } | |
166 | else | |
167 | { | |
168 | o_ltoken *oldLCLTokenTable = LCLTokenTable; | |
169 | ||
170 | llassert (oldLCLTokenTable != NULL); | |
171 | ||
172 | newSize = (long unsigned) (DELTATOKENTABLE * oldSize); | |
173 | LCLTokenTable = (ltoken *) dmalloc (newSize * sizeof (*LCLTokenTable)); | |
174 | ||
175 | for (i = 0; i < oldSize; i++) | |
176 | { | |
177 | LCLTokenTable[i] = oldLCLTokenTable[i]; | |
178 | } | |
179 | ||
180 | sfree (oldLCLTokenTable); | |
181 | } | |
182 | ||
183 | MaxToken = newSize; | |
184 | ||
185 | /*@+loopexec@*/ | |
186 | for (i = oldSize; i < newSize; i++) | |
187 | { | |
188 | LCLTokenTable[i] = ltoken_undefined; | |
189 | } | |
190 | /*@=loopexec@*/ | |
191 | /*@-compdef@*/ } /*=compdef@*/ | |
192 | ||
193 | void | |
194 | LCLTokenTableInit (void) | |
195 | { | |
196 | MaxToken = 0; | |
197 | } | |
198 | ||
199 | void | |
200 | LCLTokenTableCleanup (void) | |
201 | { | |
202 | ||
203 | if (LCLTokenTable != NULL) | |
204 | { | |
205 | long unsigned i; | |
206 | ||
207 | for (i = 0; i < MaxToken; i++) | |
208 | { | |
209 | ltoken tok = LCLTokenTable[i]; | |
210 | ||
211 | LCLTokenTable[i] = NULL; | |
212 | /*@-dependenttrans@*/ ltoken_free (tok); | |
213 | /*@=dependenttrans@*/ | |
214 | } | |
215 | ||
216 | sfree (LCLTokenTable); | |
217 | LCLTokenTable = NULL; | |
218 | } | |
219 | ||
220 | } | |
221 | ||
222 | ||
223 | ||
224 | ||
225 | ||
226 | ||
227 | ||
228 | ||
229 | ||
230 |