Bug Summary

File:cfgscan.c
Location:line 220, column 4
Description:Value stored to 'stop' is never read

Annotated Source Code

1/************************************************************
2 Copyright (c) 1994 by Silicon Graphics Computer Systems, Inc.
3
4 Permission to use, copy, modify, and distribute this
5 software and its documentation for any purpose and without
6 fee is hereby granted, provided that the above copyright
7 notice appear in all copies and that both that copyright
8 notice and this permission notice appear in supporting
9 documentation, and that the name of Silicon Graphics not be
10 used in advertising or publicity pertaining to distribution
11 of the software without specific prior written permission.
12 Silicon Graphics makes no representation about the suitability
13 of this software for any purpose. It is provided "as is"
14 without any express or implied warranty.
15
16 SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
17 SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
18 AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
19 GRAPHICS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
20 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
21 DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
22 OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH
23 THE USE OR PERFORMANCE OF THIS SOFTWARE.
24
25 ********************************************************/
26
27#include <stdio.h>
28#include <stdlib.h>
29#include <ctype.h>
30#include <X11/Xos.h>
31#include <X11/X.h>
32#include <X11/extensions/XKB.h>
33
34#include "tokens.h"
35#include "xkbevd.h"
36
37FILE *yyin = NULL((void*)0);
38
39static char scanFileBuf[1024];
40char * scanFile= scanFileBuf;
41int lineNum= 0;
42
43int scanInt;
44char *scanIntStr;
45int scanIntClass;
46
47char *scanStr = NULL((void*)0);
48int scanStrLine= 0;
49
50#define BUFSIZE512 512
51static int nInBuf = 0;
52static char buf[BUFSIZE512];
53
54#ifdef DEBUG
55
56extern unsigned debugFlags;
57
58static char *
59tokText(int tok)
60{
61static char buf[32];
62
63 switch (tok) {
64 case END_OF_FILE0: sprintf(buf, "END_OF_FILE");break;
65 case ERROR255: sprintf(buf, "ERROR"); break;
66
67 case BELL1: sprintf(buf, "BELL"); break;
68 case ACCESSX2: sprintf(buf, "ACCESSX"); break;
69 case MESSAGE3: sprintf(buf, "MESSAGE"); break;
70
71 case NONE20: sprintf(buf, "NONE"); break;
72 case IGNORE21: sprintf(buf, "IGNORE"); break;
73 case ECHO22: sprintf(buf, "ECHO"); break;
74 case PRINT_EV23: sprintf(buf, "PRINT_EV"); break;
75 case SHELL24: sprintf(buf, "SHELL"); break;
76 case SOUND25: sprintf(buf, "SOUND"); break;
77
78 case EQUALS40: sprintf(buf, "EQUALS"); break;
79 case PLUS41: sprintf(buf, "PLUS"); break;
80 case MINUS42: sprintf(buf, "MINUS"); break;
81 case DIVIDE43: sprintf(buf, "DIVIDE"); break;
82 case TIMES44: sprintf(buf, "TIMES"); break;
83 case OBRACE45: sprintf(buf, "OBRACE"); break;
84 case CBRACE46: sprintf(buf, "CBRACE"); break;
85 case OPAREN47: sprintf(buf, "OPAREN"); break;
86 case CPAREN48: sprintf(buf, "CPAREN"); break;
87 case OBRACKET49: sprintf(buf, "OBRACKET");break;
88 case CBRACKET50: sprintf(buf, "CBRACKET");break;
89 case DOT51: sprintf(buf, "DOT"); break;
90 case COMMA52: sprintf(buf, "COMMA"); break;
91 case SEMI53: sprintf(buf, "SEMI"); break;
92 case EXCLAM54: sprintf(buf, "EXCLAM"); break;
93 case INVERT55: sprintf(buf, "INVERT"); break;
94
95 case STRING60: sprintf(buf, "STRING (%s)",scanStr); break;
96 case INTEGER61: sprintf(buf, "INTEGER (0x%x)",scanInt); break;
97 case FLOAT62: sprintf(buf, "FLOAT (%d.%d)",
98 scanInt/XkbGeomPtsPerMM10,
99 scanInt%XkbGeomPtsPerMM10);break;
100 case IDENT63: sprintf(buf, "IDENT (%s)",scanStr); break;
101 case KEYNAME64: sprintf(buf, "KEYNAME (%s)",scanStr); break;
102 default: sprintf(buf, "UNKNOWN"); break;
103 }
104 return buf;
105}
106#endif
107
108int
109setScanState(const char *file, int line)
110{
111 if (file!=NULL((void*)0))
112 strncpy(scanFile,file,1024);
113 if (line>=0)
114 lineNum= line;
115 return 1;
116}
117
118static int
119yyGetString(void)
120{
121int ch;
122
123 nInBuf = 0;
124 while ( ((ch=getc(yyin)_IO_getc (yyin))!=EOF(-1)) && (ch!='"') ) {
125 if ( ch == '\\' ) {
126 if ((ch = getc(yyin)_IO_getc (yyin))!=EOF(-1)) {
127 if ( ch=='n' ) ch = '\n';
128 else if ( ch == 't' ) ch = '\t';
129 else if ( ch == 'v' ) ch = '\v';
130 else if ( ch == 'b' ) ch = '\b';
131 else if ( ch == 'r' ) ch = '\r';
132 else if ( ch == 'f' ) ch = '\f';
133 else if ( ch == 'e' ) ch = '\033';
134 else if ( ch == '0' ) {
135 int tmp,stop;
136 ch = stop = 0;
137 if (((tmp=getc(yyin)_IO_getc (yyin))!=EOF(-1)) && (isdigit(tmp)((*__ctype_b_loc ())[(int) ((tmp))] & (unsigned short int
) _ISdigit)) &&
138 (tmp!='8') && (tmp!='9')) {
139 ch= (ch*8)+(tmp-'0');
140 }
141 else {
142 stop= 1;
143 ungetc(tmp,yyin);
144 }
145 if ((!stop) && ((tmp=getc(yyin)_IO_getc (yyin))!=EOF(-1)) && (isdigit(tmp)((*__ctype_b_loc ())[(int) ((tmp))] & (unsigned short int
) _ISdigit)) &&
146 (tmp!='8') && (tmp!='9')) {
147 ch= (ch*8)+(tmp-'0');
148 }
149 else {
150 stop= 1;
151 ungetc(tmp,yyin);
152 }
153 if ((!stop) && ((tmp=getc(yyin)_IO_getc (yyin))!=EOF(-1)) && (isdigit(tmp)((*__ctype_b_loc ())[(int) ((tmp))] & (unsigned short int
) _ISdigit)) &&
154 (tmp!='8') && (tmp!='9')) {
155 ch= (ch*8)+(tmp-'0');
156 }
157 else {
158 stop= 1;
159 ungetc(tmp,yyin);
160 }
161 }
162 }
163 else return ERROR255;
164 }
165
166 if ( nInBuf < BUFSIZE512-1 )
167 buf[nInBuf++] = ch;
168 }
169 if ( ch == '"' ) {
170 buf[nInBuf++] = '\0';
171 if ( scanStr )
172 free( scanStr );
173 scanStr = uStringDup(buf)(strdup(buf));
174 scanStrLine = lineNum;
175 return STRING60;
176 }
177 return ERROR255;
178}
179
180static int
181yyGetKeyName(void)
182{
183int ch;
184
185 nInBuf = 0;
186 while ( ((ch=getc(yyin)_IO_getc (yyin))!=EOF(-1)) && (ch!='>') ) {
187 if ( ch == '\\' ) {
188 if ((ch = getc(yyin)_IO_getc (yyin))!=EOF(-1)) {
189 if ( ch=='n' ) ch = '\n';
190 else if ( ch == 't' ) ch = '\t';
191 else if ( ch == 'v' ) ch = '\v';
192 else if ( ch == 'b' ) ch = '\b';
193 else if ( ch == 'r' ) ch = '\r';
194 else if ( ch == 'f' ) ch = '\f';
195 else if ( ch == 'e' ) ch = '\033';
196 else if ( ch == '0' ) {
197 int tmp,stop;
198 ch = stop = 0;
199 if (((tmp=getc(yyin)_IO_getc (yyin))!=EOF(-1)) && (isdigit(tmp)((*__ctype_b_loc ())[(int) ((tmp))] & (unsigned short int
) _ISdigit)) &&
200 (tmp!='8') && (tmp!='9')) {
201 ch= (ch*8)+(tmp-'0');
202 }
203 else {
204 stop= 1;
205 ungetc(tmp,yyin);
206 }
207 if ((!stop) && ((tmp=getc(yyin)_IO_getc (yyin))!=EOF(-1)) && (isdigit(tmp)((*__ctype_b_loc ())[(int) ((tmp))] & (unsigned short int
) _ISdigit)) &&
208 (tmp!='8') && (tmp!='9')) {
209 ch= (ch*8)+(tmp-'0');
210 }
211 else {
212 stop= 1;
213 ungetc(tmp,yyin);
214 }
215 if ((!stop) && ((tmp=getc(yyin)_IO_getc (yyin))!=EOF(-1)) && (isdigit(tmp)((*__ctype_b_loc ())[(int) ((tmp))] & (unsigned short int
) _ISdigit)) &&
216 (tmp!='8') && (tmp!='9')) {
217 ch= (ch*8)+(tmp-'0');
218 }
219 else {
220 stop= 1;
Value stored to 'stop' is never read
221 ungetc(tmp,yyin);
222 }
223 }
224 }
225 else return ERROR255;
226 }
227
228 if ( nInBuf < BUFSIZE512-1 )
229 buf[nInBuf++] = ch;
230 }
231 if (( ch == '>' )&&(nInBuf<5)) {
232 buf[nInBuf++] = '\0';
233 if ( scanStr )
234 free( scanStr );
235 scanStr = uStringDup(buf)(strdup(buf));
236 scanStrLine = lineNum;
237 return KEYNAME64;
238 }
239 return ERROR255;
240}
241
242static struct _Keyword {
243 const char *keyword;
244 int token;
245} keywords[] = {
246 { "bell", BELL1 },
247 { "accessx", ACCESSX2 },
248 { "message", MESSAGE3 },
249 { "none", NONE20 },
250 { "ignore", IGNORE21 },
251 { "echo", ECHO22 },
252 { "printevent", PRINT_EV23 },
253 { "shell", SHELL24 },
254 { "sound", SOUND25 }
255};
256static int numKeywords = sizeof(keywords)/sizeof(struct _Keyword);
257
258static int
259yyGetIdent(int first)
260{
261int ch,i,found;
262int rtrn = -1;
263
264 buf[0] = first; nInBuf = 1;
265 while ( ((ch=getc(yyin)_IO_getc (yyin))!=EOF(-1)) && (isalnum(ch)((*__ctype_b_loc ())[(int) ((ch))] & (unsigned short int)
_ISalnum)||(ch=='_')) ) {
266 if ( nInBuf < BUFSIZE512 - 1 )
267 buf[nInBuf++] = ch;
268 }
269 buf[nInBuf++] = '\0';
270 found= 0;
271
272 for (i=0;(!found)&&(i<numKeywords);i++) {
273 if (uStrCaseCmp(buf,keywords[i].keyword)(strcasecmp(buf,keywords[i].keyword))==0) {
274 rtrn= keywords[i].token;
275 found= 1;
276 }
277 }
278 if (!found) {
279 if ( scanStr )
280 free( scanStr );
281 scanStr = uStringDup(buf)(strdup(buf));
282 scanStrLine = lineNum;
283 rtrn = IDENT63;
284 }
285
286 if ( (ch!=EOF(-1)) && (!isspace(ch)((*__ctype_b_loc ())[(int) ((ch))] & (unsigned short int)
_ISspace)) )
287 ungetc( ch, yyin );
288 else if ( ch=='\n' )
289 lineNum++;
290
291 return rtrn;
292}
293
294static int
295yyGetNumber(int ch)
296{
297int isFloat= 0;
298
299 buf[0]= ch;
300 nInBuf= 1;
301 while (((ch=getc(yyin)_IO_getc (yyin))!=EOF(-1))&&(isxdigit(ch)((*__ctype_b_loc ())[(int) ((ch))] & (unsigned short int)
_ISxdigit)||((nInBuf==1)&&(ch=='x')))) {
302 buf[nInBuf++]= ch;
303 }
304 if (ch=='.') {
305 isFloat= 1;
306 buf[nInBuf++]= ch;
307 while (((ch=getc(yyin)_IO_getc (yyin))!=EOF(-1))&&(isxdigit(ch)((*__ctype_b_loc ())[(int) ((ch))] & (unsigned short int)
_ISxdigit))) {
308 buf[nInBuf++]= ch;
309 }
310 }
311 buf[nInBuf++]= '\0';
312 if ((ch!=EOF(-1))&&(!isspace(ch)((*__ctype_b_loc ())[(int) ((ch))] & (unsigned short int)
_ISspace)))
313 ungetc( ch, yyin );
314
315 if (isFloat) {
316 float tmp;
317 if (sscanf(buf,"%g",&tmp)==1) {
318 scanInt= tmp*XkbGeomPtsPerMM10;
319 return FLOAT62;
320 }
321 }
322 else if ( sscanf(buf,"%i",&scanInt)==1 )
323 return INTEGER61;
324 fprintf(stderrstderr,"Malformed number %s\n",buf);
325 return ERROR255;
326}
327
328int
329yylex(void)
330{
331int ch;
332int rtrn;
333
334 do {
335 ch = getc(yyin)_IO_getc (yyin);
336 if ( ch == '\n' ) {
337 lineNum++;
338 }
339 else if ( ch=='/' ) { /* handle C++ style double-/ comments */
340 int newch= getc(yyin)_IO_getc (yyin);
341 if (newch=='/') {
342 do {
343 ch= getc(yyin)_IO_getc (yyin);
344 } while ((ch!='\n')&&(ch!=EOF(-1)));
345 lineNum++;
346 }
347 else if (newch!=EOF(-1)) {
348 ungetc(newch,yyin);
349 }
350 }
351 } while ((ch!=EOF(-1))&&(isspace(ch)((*__ctype_b_loc ())[(int) ((ch))] & (unsigned short int)
_ISspace)));
352 if ( ch == '=' ) rtrn = EQUALS40;
353 else if ( ch == '+' ) rtrn = PLUS41;
354 else if ( ch == '-' ) rtrn = MINUS42;
355 else if ( ch == '/' ) rtrn = DIVIDE43;
356 else if ( ch == '*' ) rtrn = TIMES44;
357 else if ( ch == '{' ) rtrn = OBRACE45;
358 else if ( ch == '}' ) rtrn = CBRACE46;
359 else if ( ch == '(' ) rtrn = OPAREN47;
360 else if ( ch == ')' ) rtrn = CPAREN48;
361 else if ( ch == '[' ) rtrn = OBRACKET49;
362 else if ( ch == ']' ) rtrn = CBRACKET50;
363 else if ( ch == '.' ) rtrn = DOT51;
364 else if ( ch == ',' ) rtrn = COMMA52;
365 else if ( ch == ';' ) rtrn = SEMI53;
366 else if ( ch == '!' ) rtrn = EXCLAM54;
367 else if ( ch == '~' ) rtrn = INVERT55;
368 else if ( ch == '"' ) rtrn = yyGetString();
369 else if ( ch == '<' ) rtrn = yyGetKeyName();
370 else if ( isalpha(ch)((*__ctype_b_loc ())[(int) ((ch))] & (unsigned short int)
_ISalpha) || (ch=='_')) rtrn = yyGetIdent(ch);
371 else if ( isdigit(ch)((*__ctype_b_loc ())[(int) ((ch))] & (unsigned short int)
_ISdigit) ) rtrn = yyGetNumber(ch);
372 else if ( ch == EOF(-1) ) rtrn = END_OF_FILE0;
373 else {
374 fprintf(stderrstderr,"Unexpected character %c (%d) in input stream\n",ch,ch);
375 rtrn = ERROR255;
376 }
377#ifdef DEBUG
378 if (debugFlags&0x2)
379 fprintf(stderrstderr,"scan: %s\n",tokText(rtrn));
380#endif
381 return rtrn;
382}