File: | glx/single2.c |
Location: | line 176, 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 | cx->hasUnflushedCommands = GL_TRUE0x1; |
75 | return Success0; |
76 | } |
77 | |
78 | int |
79 | __glXDisp_SelectBuffer(__GLXclientState * cl, GLbyte * pc) |
80 | { |
81 | ClientPtr client = cl->client; |
82 | __GLXcontext *cx; |
83 | GLsizei size; |
84 | int error; |
85 | |
86 | 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); |
87 | |
88 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
89 | if (!cx) { |
90 | return error; |
91 | } |
92 | |
93 | pc += __GLX_SINGLE_HDR_SIZE8; |
94 | size = *(GLsizei *) (pc + 0); |
95 | if (cx->selectBufSize < size) { |
96 | cx->selectBuf = reallocarrayxreallocarray(cx->selectBuf, |
97 | (size_t) size, __GLX_SIZE_CARD324); |
98 | if (!cx->selectBuf) { |
99 | cl->client->errorValue = size; |
100 | return BadAlloc11; |
101 | } |
102 | cx->selectBufSize = size; |
103 | } |
104 | glSelectBuffer(size, cx->selectBuf); |
105 | cx->hasUnflushedCommands = GL_TRUE0x1; |
106 | return Success0; |
107 | } |
108 | |
109 | int |
110 | __glXDisp_RenderMode(__GLXclientState * cl, GLbyte * pc) |
111 | { |
112 | ClientPtr client = cl->client; |
113 | xGLXRenderModeReply reply; |
114 | __GLXcontext *cx; |
115 | GLint nitems = 0, retBytes = 0, retval, newModeCheck; |
116 | GLubyte *retBuffer = NULL((void*)0); |
117 | GLenum newMode; |
118 | int error; |
119 | |
120 | 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); |
121 | |
122 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
123 | if (!cx) { |
124 | return error; |
125 | } |
126 | |
127 | pc += __GLX_SINGLE_HDR_SIZE8; |
128 | newMode = *(GLenum *) pc; |
129 | retval = glRenderMode(newMode); |
130 | |
131 | /* Check that render mode worked */ |
132 | glGetIntegerv(GL_RENDER_MODE0x0C40, &newModeCheck); |
133 | if (newModeCheck != newMode) { |
134 | /* Render mode change failed. Bail */ |
135 | newMode = newModeCheck; |
136 | goto noChangeAllowed; |
137 | } |
138 | |
139 | /* |
140 | ** Render mode might have still failed if we get here. But in this |
141 | ** case we can't really tell, nor does it matter. If it did fail, it |
142 | ** will return 0, and thus we won't send any data across the wire. |
143 | */ |
144 | |
145 | switch (cx->renderMode) { |
146 | case GL_RENDER0x1C00: |
147 | cx->renderMode = newMode; |
148 | break; |
149 | case GL_FEEDBACK0x1C01: |
150 | if (retval < 0) { |
151 | /* Overflow happened. Copy the entire buffer */ |
152 | nitems = cx->feedbackBufSize; |
153 | } |
154 | else { |
155 | nitems = retval; |
156 | } |
157 | retBytes = nitems * __GLX_SIZE_FLOAT324; |
158 | retBuffer = (GLubyte *) cx->feedbackBuf; |
159 | cx->renderMode = newMode; |
160 | break; |
161 | case GL_SELECT0x1C02: |
162 | if (retval < 0) { |
163 | /* Overflow happened. Copy the entire buffer */ |
164 | nitems = cx->selectBufSize; |
165 | } |
166 | else { |
167 | GLuint *bp = cx->selectBuf; |
168 | GLint i; |
169 | |
170 | /* |
171 | ** Figure out how many bytes of data need to be sent. Parse |
172 | ** the selection buffer to determine this fact as the |
173 | ** return value is the number of hits, not the number of |
174 | ** items in the buffer. |
175 | */ |
176 | nitems = 0; |
Value stored to 'nitems' is never read | |
177 | i = retval; |
178 | while (--i >= 0) { |
179 | GLuint n; |
180 | |
181 | /* Parse select data for this hit */ |
182 | n = *bp; |
183 | bp += 3 + n; |
184 | } |
185 | nitems = bp - cx->selectBuf; |
186 | } |
187 | retBytes = nitems * __GLX_SIZE_CARD324; |
188 | retBuffer = (GLubyte *) cx->selectBuf; |
189 | cx->renderMode = newMode; |
190 | break; |
191 | } |
192 | |
193 | /* |
194 | ** First reply is the number of elements returned in the feedback or |
195 | ** selection array, as per the API for glRenderMode itself. |
196 | */ |
197 | noChangeAllowed:; |
198 | reply = (xGLXRenderModeReply) { |
199 | .type = X_Reply1, |
200 | .sequenceNumber = client->sequence, |
201 | .length = nitems, |
202 | .retval = retval, |
203 | .size = nitems, |
204 | .newMode = newMode |
205 | }; |
206 | WriteToClient(client, sz_xGLXRenderModeReply32, &reply); |
207 | if (retBytes) { |
208 | WriteToClient(client, retBytes, retBuffer); |
209 | } |
210 | return Success0; |
211 | } |
212 | |
213 | int |
214 | __glXDisp_Flush(__GLXclientState * cl, GLbyte * pc) |
215 | { |
216 | ClientPtr client = cl->client; |
217 | __GLXcontext *cx; |
218 | int error; |
219 | |
220 | REQUEST_SIZE_MATCH(xGLXSingleReq)if ((sizeof(xGLXSingleReq) >> 2) != client->req_len) return(16); |
221 | |
222 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
223 | if (!cx) { |
224 | return error; |
225 | } |
226 | |
227 | glFlush(); |
228 | cx->hasUnflushedCommands = GL_FALSE0x0; |
229 | return Success0; |
230 | } |
231 | |
232 | int |
233 | __glXDisp_Finish(__GLXclientState * cl, GLbyte * pc) |
234 | { |
235 | ClientPtr client = cl->client; |
236 | __GLXcontext *cx; |
237 | int error; |
238 | |
239 | REQUEST_SIZE_MATCH(xGLXSingleReq)if ((sizeof(xGLXSingleReq) >> 2) != client->req_len) return(16); |
240 | |
241 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
242 | if (!cx) { |
243 | return error; |
244 | } |
245 | |
246 | /* Do a local glFinish */ |
247 | glFinish(); |
248 | cx->hasUnflushedCommands = GL_FALSE0x0; |
249 | |
250 | /* Send empty reply packet to indicate finish is finished */ |
251 | client = cl->client; |
252 | __GLX_BEGIN_REPLY(0)__glXReply.length = (((0)+3) & (GLuint)~3) >> 2; __glXReply .type = 1; __glXReply.sequenceNumber = client->sequence;; |
253 | __GLX_SEND_HEADER()WriteToClient (client, 32, &__glXReply);; |
254 | return Success0; |
255 | } |
256 | |
257 | #define SEPARATOR" " " " |
258 | |
259 | char * |
260 | __glXcombine_strings(const char *cext_string, const char *sext_string) |
261 | { |
262 | size_t clen, slen; |
263 | char *combo_string, *token, *s1; |
264 | const char *s2, *end; |
265 | |
266 | /* safeguard to prevent potentially fatal errors in the string functions */ |
267 | if (!cext_string) |
268 | cext_string = ""; |
269 | if (!sext_string) |
270 | sext_string = ""; |
271 | |
272 | /* |
273 | ** String can't be longer than min(cstring, sstring) |
274 | ** pull tokens out of shortest string |
275 | ** include space in combo_string for final separator and null terminator |
276 | */ |
277 | clen = strlen(cext_string); |
278 | slen = strlen(sext_string); |
279 | if (clen > slen) { |
280 | combo_string = (char *) malloc(slen + 2); |
281 | s1 = (char *) malloc(slen + 2); |
282 | if (s1) |
283 | strcpy(s1, sext_string)__builtin___strcpy_chk (s1, sext_string, __builtin_object_size (s1, 2 > 1 ? 1 : 0)); |
284 | s2 = cext_string; |
285 | } |
286 | else { |
287 | combo_string = (char *) malloc(clen + 2); |
288 | s1 = (char *) malloc(clen + 2); |
289 | if (s1) |
290 | strcpy(s1, cext_string)__builtin___strcpy_chk (s1, cext_string, __builtin_object_size (s1, 2 > 1 ? 1 : 0)); |
291 | s2 = sext_string; |
292 | } |
293 | if (!combo_string || !s1) { |
294 | free(combo_string); |
295 | free(s1); |
296 | return NULL((void*)0); |
297 | } |
298 | combo_string[0] = '\0'; |
299 | |
300 | /* Get first extension token */ |
301 | token = strtok(s1, SEPARATOR" "); |
302 | while (token != NULL((void*)0)) { |
303 | |
304 | /* |
305 | ** if token in second string then save it |
306 | ** beware of extension names which are prefixes of other extension names |
307 | */ |
308 | const char *p = s2; |
309 | |
310 | end = p + strlen(p); |
311 | while (p < end) { |
312 | size_t n = strcspn(p, SEPARATOR" "); |
313 | |
314 | if ((strlen(token) == n) && (strncmp(token, p, n) == 0)) { |
315 | combo_string = strcat(combo_string, token)__builtin___strcat_chk (combo_string, token, __builtin_object_size (combo_string, 2 > 1 ? 1 : 0)); |
316 | combo_string = strcat(combo_string, SEPARATOR)__builtin___strcat_chk (combo_string, " ", __builtin_object_size (combo_string, 2 > 1 ? 1 : 0)); |
317 | } |
318 | p += (n + 1); |
319 | } |
320 | |
321 | /* Get next extension token */ |
322 | token = strtok(NULL((void*)0), SEPARATOR" "); |
323 | } |
324 | free(s1); |
325 | return combo_string; |
326 | } |
327 | |
328 | int |
329 | DoGetString(__GLXclientState * cl, GLbyte * pc, GLboolean need_swap) |
330 | { |
331 | ClientPtr client = cl->client; |
332 | __GLXcontext *cx; |
333 | GLenum name; |
334 | const char *string; |
335 | |
336 | __GLX_DECLARE_SWAP_VARIABLESGLbyte sw; |
337 | int error; |
338 | char *buf = NULL((void*)0), *buf1 = NULL((void*)0); |
339 | GLint length = 0; |
340 | |
341 | 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); |
342 | |
343 | /* If the client has the opposite byte order, swap the contextTag and |
344 | * the name. |
345 | */ |
346 | if (need_swap) { |
347 | __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;; |
348 | __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;; |
349 | } |
350 | |
351 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
352 | if (!cx) { |
353 | return error; |
354 | } |
355 | |
356 | pc += __GLX_SINGLE_HDR_SIZE8; |
357 | name = *(GLenum *) (pc + 0); |
358 | string = (const char *) glGetString(name); |
359 | |
360 | if (string == NULL((void*)0)) |
361 | string = ""; |
362 | |
363 | /* |
364 | ** Restrict extensions to those that are supported by both the |
365 | ** implementation and the connection. That is, return the |
366 | ** intersection of client, server, and core extension strings. |
367 | */ |
368 | if (name == GL_EXTENSIONS0x1F03) { |
369 | buf1 = __glXcombine_strings(string, cl->GLClientextensions); |
370 | buf = __glXcombine_strings(buf1, cx->pGlxScreen->GLextensions); |
371 | free(buf1); |
372 | string = buf; |
373 | } |
374 | else if (name == GL_VERSION0x1F02) { |
375 | if (atof(string) > atof(GLServerVersion)) { |
376 | if (asprintf(&buf, "%s (%s)", GLServerVersion, string) == -1) { |
377 | string = GLServerVersion; |
378 | } |
379 | else { |
380 | string = buf; |
381 | } |
382 | } |
383 | } |
384 | if (string) { |
385 | length = strlen((const char *) string) + 1; |
386 | } |
387 | |
388 | __GLX_BEGIN_REPLY(length)__glXReply.length = (((length)+3) & (GLuint)~3) >> 2 ; __glXReply.type = 1; __glXReply.sequenceNumber = client-> sequence;; |
389 | __GLX_PUT_SIZE(length)__glXReply.size = (length);; |
390 | |
391 | if (need_swap) { |
392 | __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;; |
393 | __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;;; |
394 | } |
395 | |
396 | __GLX_SEND_HEADER()WriteToClient (client, 32, &__glXReply);; |
397 | WriteToClient(client, length, string); |
398 | free(buf); |
399 | |
400 | return Success0; |
401 | } |
402 | |
403 | int |
404 | __glXDisp_GetString(__GLXclientState * cl, GLbyte * pc) |
405 | { |
406 | return DoGetString(cl, pc, GL_FALSE0x0); |
407 | } |