File: | glx/single2.c |
Location: | line 174, column 13 |
Description: | Value stored to 'nitems' is never read |
1 | /* |
2 | * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008) |
3 | * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved. |
4 | * |
5 | * Permission is hereby granted, free of charge, to any person obtaining a |
6 | * copy of this software and associated documentation files (the "Software"), |
7 | * to deal in the Software without restriction, including without limitation |
8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
9 | * and/or sell copies of the Software, and to permit persons to whom the |
10 | * Software is furnished to do so, subject to the following conditions: |
11 | * |
12 | * The above copyright notice including the dates of first publication and |
13 | * either this permission notice or a reference to |
14 | * http://oss.sgi.com/projects/FreeB/ |
15 | * shall be included in all copies or substantial portions of the Software. |
16 | * |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
18 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
20 | * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
21 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF |
22 | * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
23 | * SOFTWARE. |
24 | * |
25 | * Except as contained in this notice, the name of Silicon Graphics, Inc. |
26 | * shall not be used in advertising or otherwise to promote the sale, use or |
27 | * other dealings in this Software without prior written authorization from |
28 | * Silicon Graphics, Inc. |
29 | */ |
30 | |
31 | #ifdef HAVE_DIX_CONFIG_H1 |
32 | #include <dix-config.h> |
33 | #endif |
34 | |
35 | #include <string.h> |
36 | #include <stdio.h> |
37 | #include <stdlib.h> |
38 | |
39 | #include "glxserver.h" |
40 | #include "glxutil.h" |
41 | #include "glxext.h" |
42 | #include "indirect_dispatch.h" |
43 | #include "unpack.h" |
44 | |
45 | int |
46 | __glXDisp_FeedbackBuffer(__GLXclientState * cl, GLbyte * pc) |
47 | { |
48 | ClientPtr client = cl->client; |
49 | GLsizei size; |
50 | GLenum type; |
51 | __GLXcontext *cx; |
52 | int error; |
53 | |
54 | REQUEST_FIXED_SIZE(xGLXSingleReq, 8)if (((sizeof(xGLXSingleReq) >> 2) > client->req_len ) || (((8) >> 2) >= client->req_len) || ((((uint64_t ) sizeof(xGLXSingleReq) + (8) + 3) >> 2) != (uint64_t) client ->req_len)) return(16); |
55 | |
56 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
57 | if (!cx) { |
58 | return error; |
59 | } |
60 | |
61 | pc += __GLX_SINGLE_HDR_SIZE8; |
62 | size = *(GLsizei *) (pc + 0); |
63 | type = *(GLenum *) (pc + 4); |
64 | if (cx->feedbackBufSize < size) { |
65 | cx->feedbackBuf = reallocarrayxreallocarray(cx->feedbackBuf, |
66 | (size_t) size, __GLX_SIZE_FLOAT324); |
67 | if (!cx->feedbackBuf) { |
68 | cl->client->errorValue = size; |
69 | return BadAlloc11; |
70 | } |
71 | cx->feedbackBufSize = size; |
72 | } |
73 | glFeedbackBuffer(size, type, cx->feedbackBuf); |
74 | return Success0; |
75 | } |
76 | |
77 | int |
78 | __glXDisp_SelectBuffer(__GLXclientState * cl, GLbyte * pc) |
79 | { |
80 | ClientPtr client = cl->client; |
81 | __GLXcontext *cx; |
82 | GLsizei size; |
83 | int error; |
84 | |
85 | REQUEST_FIXED_SIZE(xGLXSingleReq, 4)if (((sizeof(xGLXSingleReq) >> 2) > client->req_len ) || (((4) >> 2) >= client->req_len) || ((((uint64_t ) sizeof(xGLXSingleReq) + (4) + 3) >> 2) != (uint64_t) client ->req_len)) return(16); |
86 | |
87 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
88 | if (!cx) { |
89 | return error; |
90 | } |
91 | |
92 | pc += __GLX_SINGLE_HDR_SIZE8; |
93 | size = *(GLsizei *) (pc + 0); |
94 | if (cx->selectBufSize < size) { |
95 | cx->selectBuf = reallocarrayxreallocarray(cx->selectBuf, |
96 | (size_t) size, __GLX_SIZE_CARD324); |
97 | if (!cx->selectBuf) { |
98 | cl->client->errorValue = size; |
99 | return BadAlloc11; |
100 | } |
101 | cx->selectBufSize = size; |
102 | } |
103 | glSelectBuffer(size, cx->selectBuf); |
104 | return Success0; |
105 | } |
106 | |
107 | int |
108 | __glXDisp_RenderMode(__GLXclientState * cl, GLbyte * pc) |
109 | { |
110 | ClientPtr client = cl->client; |
111 | xGLXRenderModeReply reply; |
112 | __GLXcontext *cx; |
113 | GLint nitems = 0, retBytes = 0, retval, newModeCheck; |
114 | GLubyte *retBuffer = NULL((void*)0); |
115 | GLenum newMode; |
116 | int error; |
117 | |
118 | REQUEST_FIXED_SIZE(xGLXSingleReq, 4)if (((sizeof(xGLXSingleReq) >> 2) > client->req_len ) || (((4) >> 2) >= client->req_len) || ((((uint64_t ) sizeof(xGLXSingleReq) + (4) + 3) >> 2) != (uint64_t) client ->req_len)) return(16); |
119 | |
120 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
121 | if (!cx) { |
122 | return error; |
123 | } |
124 | |
125 | pc += __GLX_SINGLE_HDR_SIZE8; |
126 | newMode = *(GLenum *) pc; |
127 | retval = glRenderMode(newMode); |
128 | |
129 | /* Check that render mode worked */ |
130 | glGetIntegerv(GL_RENDER_MODE0x0C40, &newModeCheck); |
131 | if (newModeCheck != newMode) { |
132 | /* Render mode change failed. Bail */ |
133 | newMode = newModeCheck; |
134 | goto noChangeAllowed; |
135 | } |
136 | |
137 | /* |
138 | ** Render mode might have still failed if we get here. But in this |
139 | ** case we can't really tell, nor does it matter. If it did fail, it |
140 | ** will return 0, and thus we won't send any data across the wire. |
141 | */ |
142 | |
143 | switch (cx->renderMode) { |
144 | case GL_RENDER0x1C00: |
145 | cx->renderMode = newMode; |
146 | break; |
147 | case GL_FEEDBACK0x1C01: |
148 | if (retval < 0) { |
149 | /* Overflow happened. Copy the entire buffer */ |
150 | nitems = cx->feedbackBufSize; |
151 | } |
152 | else { |
153 | nitems = retval; |
154 | } |
155 | retBytes = nitems * __GLX_SIZE_FLOAT324; |
156 | retBuffer = (GLubyte *) cx->feedbackBuf; |
157 | cx->renderMode = newMode; |
158 | break; |
159 | case GL_SELECT0x1C02: |
160 | if (retval < 0) { |
161 | /* Overflow happened. Copy the entire buffer */ |
162 | nitems = cx->selectBufSize; |
163 | } |
164 | else { |
165 | GLuint *bp = cx->selectBuf; |
166 | GLint i; |
167 | |
168 | /* |
169 | ** Figure out how many bytes of data need to be sent. Parse |
170 | ** the selection buffer to determine this fact as the |
171 | ** return value is the number of hits, not the number of |
172 | ** items in the buffer. |
173 | */ |
174 | nitems = 0; |
Value stored to 'nitems' is never read | |
175 | i = retval; |
176 | while (--i >= 0) { |
177 | GLuint n; |
178 | |
179 | /* Parse select data for this hit */ |
180 | n = *bp; |
181 | bp += 3 + n; |
182 | } |
183 | nitems = bp - cx->selectBuf; |
184 | } |
185 | retBytes = nitems * __GLX_SIZE_CARD324; |
186 | retBuffer = (GLubyte *) cx->selectBuf; |
187 | cx->renderMode = newMode; |
188 | break; |
189 | } |
190 | |
191 | /* |
192 | ** First reply is the number of elements returned in the feedback or |
193 | ** selection array, as per the API for glRenderMode itself. |
194 | */ |
195 | noChangeAllowed:; |
196 | reply = (xGLXRenderModeReply) { |
197 | .type = X_Reply1, |
198 | .sequenceNumber = client->sequence, |
199 | .length = nitems, |
200 | .retval = retval, |
201 | .size = nitems, |
202 | .newMode = newMode |
203 | }; |
204 | WriteToClient(client, sz_xGLXRenderModeReply32, &reply); |
205 | if (retBytes) { |
206 | WriteToClient(client, retBytes, retBuffer); |
207 | } |
208 | return Success0; |
209 | } |
210 | |
211 | int |
212 | __glXDisp_Flush(__GLXclientState * cl, GLbyte * pc) |
213 | { |
214 | ClientPtr client = cl->client; |
215 | __GLXcontext *cx; |
216 | int error; |
217 | |
218 | REQUEST_SIZE_MATCH(xGLXSingleReq)if ((sizeof(xGLXSingleReq) >> 2) != client->req_len) return(16); |
219 | |
220 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
221 | if (!cx) { |
222 | return error; |
223 | } |
224 | |
225 | glFlush(); |
226 | return Success0; |
227 | } |
228 | |
229 | int |
230 | __glXDisp_Finish(__GLXclientState * cl, GLbyte * pc) |
231 | { |
232 | ClientPtr client = cl->client; |
233 | __GLXcontext *cx; |
234 | int error; |
235 | |
236 | REQUEST_SIZE_MATCH(xGLXSingleReq)if ((sizeof(xGLXSingleReq) >> 2) != client->req_len) return(16); |
237 | |
238 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
239 | if (!cx) { |
240 | return error; |
241 | } |
242 | |
243 | /* Do a local glFinish */ |
244 | glFinish(); |
245 | |
246 | /* Send empty reply packet to indicate finish is finished */ |
247 | client = cl->client; |
248 | __GLX_BEGIN_REPLY(0)__glXReply.length = (((0)+3) & (GLuint)~3) >> 2; __glXReply .type = 1; __glXReply.sequenceNumber = client->sequence;; |
249 | __GLX_SEND_HEADER()WriteToClient (client, 32, &__glXReply);; |
250 | return Success0; |
251 | } |
252 | |
253 | #define SEPARATOR" " " " |
254 | |
255 | char * |
256 | __glXcombine_strings(const char *cext_string, const char *sext_string) |
257 | { |
258 | size_t clen, slen; |
259 | char *combo_string, *token, *s1; |
260 | const char *s2, *end; |
261 | |
262 | /* safeguard to prevent potentially fatal errors in the string functions */ |
263 | if (!cext_string) |
264 | cext_string = ""; |
265 | if (!sext_string) |
266 | sext_string = ""; |
267 | |
268 | /* |
269 | ** String can't be longer than min(cstring, sstring) |
270 | ** pull tokens out of shortest string |
271 | ** include space in combo_string for final separator and null terminator |
272 | */ |
273 | clen = strlen(cext_string); |
274 | slen = strlen(sext_string); |
275 | if (clen > slen) { |
276 | combo_string = (char *) malloc(slen + 2); |
277 | s1 = (char *) malloc(slen + 2); |
278 | if (s1) |
279 | strcpy(s1, sext_string)__builtin___strcpy_chk (s1, sext_string, __builtin_object_size (s1, 2 > 1 ? 1 : 0)); |
280 | s2 = cext_string; |
281 | } |
282 | else { |
283 | combo_string = (char *) malloc(clen + 2); |
284 | s1 = (char *) malloc(clen + 2); |
285 | if (s1) |
286 | strcpy(s1, cext_string)__builtin___strcpy_chk (s1, cext_string, __builtin_object_size (s1, 2 > 1 ? 1 : 0)); |
287 | s2 = sext_string; |
288 | } |
289 | if (!combo_string || !s1) { |
290 | free(combo_string); |
291 | free(s1); |
292 | return NULL((void*)0); |
293 | } |
294 | combo_string[0] = '\0'; |
295 | |
296 | /* Get first extension token */ |
297 | token = strtok(s1, SEPARATOR" "); |
298 | while (token != NULL((void*)0)) { |
299 | |
300 | /* |
301 | ** if token in second string then save it |
302 | ** beware of extension names which are prefixes of other extension names |
303 | */ |
304 | const char *p = s2; |
305 | |
306 | end = p + strlen(p); |
307 | while (p < end) { |
308 | size_t n = strcspn(p, SEPARATOR" "); |
309 | |
310 | if ((strlen(token) == n) && (strncmp(token, p, n) == 0)) { |
311 | combo_string = strcat(combo_string, token)__builtin___strcat_chk (combo_string, token, __builtin_object_size (combo_string, 2 > 1 ? 1 : 0)); |
312 | combo_string = strcat(combo_string, SEPARATOR)__builtin___strcat_chk (combo_string, " ", __builtin_object_size (combo_string, 2 > 1 ? 1 : 0)); |
313 | } |
314 | p += (n + 1); |
315 | } |
316 | |
317 | /* Get next extension token */ |
318 | token = strtok(NULL((void*)0), SEPARATOR" "); |
319 | } |
320 | free(s1); |
321 | return combo_string; |
322 | } |
323 | |
324 | int |
325 | DoGetString(__GLXclientState * cl, GLbyte * pc, GLboolean need_swap) |
326 | { |
327 | ClientPtr client = cl->client; |
328 | __GLXcontext *cx; |
329 | GLenum name; |
330 | const char *string; |
331 | |
332 | __GLX_DECLARE_SWAP_VARIABLESGLbyte sw; |
333 | int error; |
334 | char *buf = NULL((void*)0), *buf1 = NULL((void*)0); |
335 | GLint length = 0; |
336 | |
337 | REQUEST_FIXED_SIZE(xGLXSingleReq, 4)if (((sizeof(xGLXSingleReq) >> 2) > client->req_len ) || (((4) >> 2) >= client->req_len) || ((((uint64_t ) sizeof(xGLXSingleReq) + (4) + 3) >> 2) != (uint64_t) client ->req_len)) return(16); |
338 | |
339 | /* If the client has the opposite byte order, swap the contextTag and |
340 | * the name. |
341 | */ |
342 | if (need_swap) { |
343 | __GLX_SWAP_INT(pc + 4)sw = ((GLbyte *)(pc + 4))[0]; ((GLbyte *)(pc + 4))[0] = ((GLbyte *)(pc + 4))[3]; ((GLbyte *)(pc + 4))[3] = sw; sw = ((GLbyte * )(pc + 4))[1]; ((GLbyte *)(pc + 4))[1] = ((GLbyte *)(pc + 4)) [2]; ((GLbyte *)(pc + 4))[2] = sw;; |
344 | __GLX_SWAP_INT(pc + __GLX_SINGLE_HDR_SIZE)sw = ((GLbyte *)(pc + 8))[0]; ((GLbyte *)(pc + 8))[0] = ((GLbyte *)(pc + 8))[3]; ((GLbyte *)(pc + 8))[3] = sw; sw = ((GLbyte * )(pc + 8))[1]; ((GLbyte *)(pc + 8))[1] = ((GLbyte *)(pc + 8)) [2]; ((GLbyte *)(pc + 8))[2] = sw;; |
345 | } |
346 | |
347 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
348 | if (!cx) { |
349 | return error; |
350 | } |
351 | |
352 | pc += __GLX_SINGLE_HDR_SIZE8; |
353 | name = *(GLenum *) (pc + 0); |
354 | string = (const char *) glGetString(name); |
355 | |
356 | if (string == NULL((void*)0)) |
357 | string = ""; |
358 | |
359 | /* |
360 | ** Restrict extensions to those that are supported by both the |
361 | ** implementation and the connection. That is, return the |
362 | ** intersection of client, server, and core extension strings. |
363 | */ |
364 | if (name == GL_EXTENSIONS0x1F03) { |
365 | buf1 = __glXcombine_strings(string, cl->GLClientextensions); |
366 | buf = __glXcombine_strings(buf1, cx->pGlxScreen->GLextensions); |
367 | free(buf1); |
368 | string = buf; |
369 | } |
370 | else if (name == GL_VERSION0x1F02) { |
371 | if (atof(string) > atof(GLServerVersion)) { |
372 | if (asprintf(&buf, "%s (%s)", GLServerVersion, string) == -1) { |
373 | string = GLServerVersion; |
374 | } |
375 | else { |
376 | string = buf; |
377 | } |
378 | } |
379 | } |
380 | if (string) { |
381 | length = strlen((const char *) string) + 1; |
382 | } |
383 | |
384 | __GLX_BEGIN_REPLY(length)__glXReply.length = (((length)+3) & (GLuint)~3) >> 2 ; __glXReply.type = 1; __glXReply.sequenceNumber = client-> sequence;; |
385 | __GLX_PUT_SIZE(length)__glXReply.size = (length);; |
386 | |
387 | if (need_swap) { |
388 | __GLX_SWAP_REPLY_SIZE()sw = ((GLbyte *)(&__glXReply.size))[0]; ((GLbyte *)(& __glXReply.size))[0] = ((GLbyte *)(&__glXReply.size))[3]; ((GLbyte *)(&__glXReply.size))[3] = sw; sw = ((GLbyte *) (&__glXReply.size))[1]; ((GLbyte *)(&__glXReply.size) )[1] = ((GLbyte *)(&__glXReply.size))[2]; ((GLbyte *)(& __glXReply.size))[2] = sw;; |
389 | __GLX_SWAP_REPLY_HEADER()sw = ((GLbyte *)(&__glXReply.sequenceNumber))[0]; ((GLbyte *)(&__glXReply.sequenceNumber))[0] = ((GLbyte *)(&__glXReply .sequenceNumber))[1]; ((GLbyte *)(&__glXReply.sequenceNumber ))[1] = sw;; sw = ((GLbyte *)(&__glXReply.length))[0]; (( GLbyte *)(&__glXReply.length))[0] = ((GLbyte *)(&__glXReply .length))[3]; ((GLbyte *)(&__glXReply.length))[3] = sw; sw = ((GLbyte *)(&__glXReply.length))[1]; ((GLbyte *)(& __glXReply.length))[1] = ((GLbyte *)(&__glXReply.length)) [2]; ((GLbyte *)(&__glXReply.length))[2] = sw;;; |
390 | } |
391 | |
392 | __GLX_SEND_HEADER()WriteToClient (client, 32, &__glXReply);; |
393 | WriteToClient(client, length, string); |
394 | free(buf); |
395 | |
396 | return Success0; |
397 | } |
398 | |
399 | int |
400 | __glXDisp_GetString(__GLXclientState * cl, GLbyte * pc) |
401 | { |
402 | return DoGetString(cl, pc, GL_FALSE0x0); |
403 | } |