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616915dd | 1 | /* |
11db3170 | 2 | ** Splint - annotation-assisted static program checker |
c59f5181 | 3 | ** Copyright (C) 1994-2003 University of Virginia, |
616915dd | 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 | ** | |
155af98d | 20 | ** For information on splint: info@splint.org |
21 | ** To report a bug: splint-bug@splint.org | |
11db3170 | 22 | ** For more information: http://www.splint.org |
616915dd | 23 | */ |
24 | /* | |
25 | ** lclscan.c | |
26 | ** | |
27 | ** Deliver tokens one at a time | |
28 | ** | |
29 | ** METHOD: | |
30 | ** The input arrives via LSLScanFreshToken (). | |
31 | ** The output is reported via LSLScanNextToken (). | |
32 | ** | |
33 | ** The tokens are built in module ScanLine. | |
34 | ** The tokens are delivered from this module. | |
35 | ** Meantimes, they are saved in a static array. | |
36 | ** | |
37 | ** The tokenizing is split off from the delivery of tokens | |
38 | ** to facilitate incremental scanning at a later date. | |
39 | ** The essential is that scanline () can be called or not | |
40 | ** if the input text is dirty or not. Clean lines cause | |
41 | ** tokens to be played out from the saved token list (not | |
42 | ** yet implemented in this version). | |
43 | */ | |
44 | ||
1b8ae690 | 45 | # include "splintMacros.nf" |
b73d1009 | 46 | # include "basic.h" |
616915dd | 47 | |
48 | /*@-redecl@*/ /* from llgrammar.y */ | |
49 | extern bool g_inTypeDef; | |
50 | /*@=redecl@*/ | |
51 | ||
52 | /*@ignore@*/ | |
53 | # include "llgrammar2.h" /* hack to force real include */ | |
54 | /*@end@*/ | |
55 | ||
56 | # include "lclscan.h" | |
57 | # include "scanline.h" | |
58 | # include "lclscanline.h" | |
59 | # include "lcltokentable.h" | |
60 | ||
28bf4b0b | 61 | static inputStream scanFile; /* file to scan */ |
616915dd | 62 | static o_ltoken TokenList[MAXLINE]; /* available tokens */ |
63 | static bool restore = FALSE; /* wasn't static! */ | |
64 | static YYSTYPE restoretok; | |
65 | static int nextToken; /* next available token */ | |
66 | static int lastToken; /* next available slot */ | |
67 | ||
68 | static /*@dependent@*/ /*@null@*/ char *line; /* input text */ | |
69 | static unsigned int lineNumber; /* current line number */ | |
70 | ||
71 | ltokenCode yllex (void) | |
72 | /*@globals killed restoretok@*/ | |
73 | { | |
74 | lsymbol tokenSym; | |
75 | ||
76 | if (restore) | |
77 | { | |
78 | yllval = restoretok; | |
79 | restore = FALSE; | |
80 | } | |
81 | else | |
82 | { | |
83 | yllval.ltok = ltoken_copy (LCLScanNextToken ()); | |
84 | } | |
85 | ||
86 | tokenSym = ltoken_getText (yllval.ltok); | |
87 | ||
88 | if (ltoken_getCode (yllval.ltok) == simpleId) | |
89 | { | |
90 | if (g_inTypeDef) | |
91 | { | |
92 | ltoken_setCode (yllval.ltok, LLT_TYPEDEF_NAME); | |
93 | LCLUpdateToken (LLT_TYPEDEF_NAME, tokenSym, | |
94 | ltoken_isStateDefined (yllval.ltok)); | |
95 | } | |
96 | else | |
97 | { | |
98 | /* or if it is already declared as a type, so | |
99 | typedef int foo; typedef foo bar; works*/ | |
100 | if (symtable_exists (g_symtab, tokenSym)) | |
101 | { | |
102 | if (typeInfo_exists (symtable_typeInfo (g_symtab, tokenSym))) | |
103 | { | |
104 | ltoken_setCode (yllval.ltok, LLT_TYPEDEF_NAME); | |
105 | LCLUpdateToken (LLT_TYPEDEF_NAME, tokenSym, | |
106 | ltoken_isStateDefined (yllval.ltok)); | |
107 | } | |
108 | } | |
109 | } | |
110 | } | |
111 | ||
112 | return (ltoken_getCode (yllval.ltok)); | |
113 | } | |
114 | ||
115 | /* useful for scanning LCL init files and LSL init files ? */ | |
116 | ||
117 | /*@dependent@*/ ltoken | |
118 | LCLScanNextToken (void) | |
119 | { | |
120 | ltoken ret; | |
121 | ||
122 | if (nextToken < lastToken) | |
123 | { | |
124 | ret = TokenList[nextToken++]; | |
125 | } | |
126 | else | |
127 | { | |
128 | lastToken = 0; | |
129 | lineNumber++; | |
28bf4b0b | 130 | line = inputStream_nextLine (scanFile); |
616915dd | 131 | |
132 | if (line != (char *) 0) | |
133 | { | |
134 | ||
135 | LCLScanLine (line); | |
136 | nextToken = 0; | |
137 | ret = LCLScanNextToken (); | |
138 | return ret; | |
139 | } | |
140 | else | |
141 | { | |
142 | ret = LCLScanEofToken (); | |
143 | } | |
144 | } | |
145 | ||
146 | ||
147 | return ret; | |
148 | } | |
149 | ||
150 | static /*@exposed@*/ /*@dependent@*/ ltoken | |
151 | LCLScanLookAhead (void) | |
152 | { | |
153 | if (nextToken < lastToken) | |
154 | { | |
155 | return TokenList[nextToken]; | |
156 | } | |
157 | else | |
158 | { | |
159 | lastToken = 0; | |
28bf4b0b | 160 | line = inputStream_nextLine (scanFile); |
616915dd | 161 | if (line != (char *) 0) |
162 | { | |
163 | LCLScanLine (line); | |
164 | nextToken = 0; | |
165 | return LCLScanLookAhead (); | |
166 | } | |
167 | else | |
168 | { | |
169 | return LCLScanEofToken (); | |
170 | } | |
171 | } | |
172 | } | |
173 | ||
174 | void | |
175 | LCLScanFreshToken (/*@only@*/ ltoken tok) | |
176 | { | |
177 | if (lastToken < MAXLINE) | |
178 | { | |
179 | TokenList[lastToken++] = tok; | |
180 | } | |
181 | else | |
182 | { | |
183 | llbugexitlit ("LCLScanFreshToken: out of range"); | |
184 | } | |
185 | } | |
186 | ||
28bf4b0b | 187 | inputStream LCLScanSource (void) |
616915dd | 188 | { |
189 | return scanFile; | |
190 | } | |
191 | ||
192 | ||
193 | void | |
194 | LCLScanInit (void) | |
195 | { | |
196 | } | |
197 | ||
198 | void | |
28bf4b0b | 199 | LCLScanReset (inputStream s) |
616915dd | 200 | { |
201 | scanFile = s; | |
202 | lastToken = 0; | |
203 | nextToken = lastToken + 1; | |
204 | lineNumber = 0; | |
205 | } | |
206 | ||
207 | void | |
208 | LCLScanCleanup (void) | |
209 | { | |
210 | } | |
211 | ||
212 |