File: | glx/single2.c |
Location: | line 177, 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 = (GLfloat *) realloc(cx->feedbackBuf, |
66 | (size_t) size |
67 | * __GLX_SIZE_FLOAT324); |
68 | if (!cx->feedbackBuf) { |
69 | cl->client->errorValue = size; |
70 | return BadAlloc11; |
71 | } |
72 | cx->feedbackBufSize = size; |
73 | } |
74 | glFeedbackBuffer(size, type, cx->feedbackBuf); |
75 | cx->hasUnflushedCommands = GL_TRUE0x1; |
76 | return Success0; |
77 | } |
78 | |
79 | int |
80 | __glXDisp_SelectBuffer(__GLXclientState * cl, GLbyte * pc) |
81 | { |
82 | ClientPtr client = cl->client; |
83 | __GLXcontext *cx; |
84 | GLsizei size; |
85 | int error; |
86 | |
87 | 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); |
88 | |
89 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
90 | if (!cx) { |
91 | return error; |
92 | } |
93 | |
94 | pc += __GLX_SINGLE_HDR_SIZE8; |
95 | size = *(GLsizei *) (pc + 0); |
96 | if (cx->selectBufSize < size) { |
97 | cx->selectBuf = (GLuint *) realloc(cx->selectBuf, |
98 | (size_t) size * __GLX_SIZE_CARD324); |
99 | if (!cx->selectBuf) { |
100 | cl->client->errorValue = size; |
101 | return BadAlloc11; |
102 | } |
103 | cx->selectBufSize = size; |
104 | } |
105 | glSelectBuffer(size, cx->selectBuf); |
106 | cx->hasUnflushedCommands = GL_TRUE0x1; |
107 | return Success0; |
108 | } |
109 | |
110 | int |
111 | __glXDisp_RenderMode(__GLXclientState * cl, GLbyte * pc) |
112 | { |
113 | ClientPtr client = cl->client; |
114 | xGLXRenderModeReply reply; |
115 | __GLXcontext *cx; |
116 | GLint nitems = 0, retBytes = 0, retval, newModeCheck; |
117 | GLubyte *retBuffer = NULL((void*)0); |
118 | GLenum newMode; |
119 | int error; |
120 | |
121 | 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); |
122 | |
123 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
124 | if (!cx) { |
125 | return error; |
126 | } |
127 | |
128 | pc += __GLX_SINGLE_HDR_SIZE8; |
129 | newMode = *(GLenum *) pc; |
130 | retval = glRenderMode(newMode); |
131 | |
132 | /* Check that render mode worked */ |
133 | glGetIntegerv(GL_RENDER_MODE0x0C40, &newModeCheck); |
134 | if (newModeCheck != newMode) { |
135 | /* Render mode change failed. Bail */ |
136 | newMode = newModeCheck; |
137 | goto noChangeAllowed; |
138 | } |
139 | |
140 | /* |
141 | ** Render mode might have still failed if we get here. But in this |
142 | ** case we can't really tell, nor does it matter. If it did fail, it |
143 | ** will return 0, and thus we won't send any data across the wire. |
144 | */ |
145 | |
146 | switch (cx->renderMode) { |
147 | case GL_RENDER0x1C00: |
148 | cx->renderMode = newMode; |
149 | break; |
150 | case GL_FEEDBACK0x1C01: |
151 | if (retval < 0) { |
152 | /* Overflow happened. Copy the entire buffer */ |
153 | nitems = cx->feedbackBufSize; |
154 | } |
155 | else { |
156 | nitems = retval; |
157 | } |
158 | retBytes = nitems * __GLX_SIZE_FLOAT324; |
159 | retBuffer = (GLubyte *) cx->feedbackBuf; |
160 | cx->renderMode = newMode; |
161 | break; |
162 | case GL_SELECT0x1C02: |
163 | if (retval < 0) { |
164 | /* Overflow happened. Copy the entire buffer */ |
165 | nitems = cx->selectBufSize; |
166 | } |
167 | else { |
168 | GLuint *bp = cx->selectBuf; |
169 | GLint i; |
170 | |
171 | /* |
172 | ** Figure out how many bytes of data need to be sent. Parse |
173 | ** the selection buffer to determine this fact as the |
174 | ** return value is the number of hits, not the number of |
175 | ** items in the buffer. |
176 | */ |
177 | nitems = 0; |
Value stored to 'nitems' is never read | |
178 | i = retval; |
179 | while (--i >= 0) { |
180 | GLuint n; |
181 | |
182 | /* Parse select data for this hit */ |
183 | n = *bp; |
184 | bp += 3 + n; |
185 | } |
186 | nitems = bp - cx->selectBuf; |
187 | } |
188 | retBytes = nitems * __GLX_SIZE_CARD324; |
189 | retBuffer = (GLubyte *) cx->selectBuf; |
190 | cx->renderMode = newMode; |
191 | break; |
192 | } |
193 | |
194 | /* |
195 | ** First reply is the number of elements returned in the feedback or |
196 | ** selection array, as per the API for glRenderMode itself. |
197 | */ |
198 | noChangeAllowed:; |
199 | reply = (xGLXRenderModeReply) { |
200 | .type = X_Reply1, |
201 | .sequenceNumber = client->sequence, |
202 | .length = nitems, |
203 | .retval = retval, |
204 | .size = nitems, |
205 | .newMode = newMode |
206 | }; |
207 | WriteToClient(client, sz_xGLXRenderModeReply32, &reply); |
208 | if (retBytes) { |
209 | WriteToClient(client, retBytes, retBuffer); |
210 | } |
211 | return Success0; |
212 | } |
213 | |
214 | int |
215 | __glXDisp_Flush(__GLXclientState * cl, GLbyte * pc) |
216 | { |
217 | ClientPtr client = cl->client; |
218 | __GLXcontext *cx; |
219 | int error; |
220 | |
221 | REQUEST_SIZE_MATCH(xGLXSingleReq)if ((sizeof(xGLXSingleReq) >> 2) != client->req_len) return(16); |
222 | |
223 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
224 | if (!cx) { |
225 | return error; |
226 | } |
227 | |
228 | glFlush(); |
229 | cx->hasUnflushedCommands = GL_FALSE0x0; |
230 | return Success0; |
231 | } |
232 | |
233 | int |
234 | __glXDisp_Finish(__GLXclientState * cl, GLbyte * pc) |
235 | { |
236 | ClientPtr client = cl->client; |
237 | __GLXcontext *cx; |
238 | int error; |
239 | |
240 | REQUEST_SIZE_MATCH(xGLXSingleReq)if ((sizeof(xGLXSingleReq) >> 2) != client->req_len) return(16); |
241 | |
242 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
243 | if (!cx) { |
244 | return error; |
245 | } |
246 | |
247 | /* Do a local glFinish */ |
248 | glFinish(); |
249 | cx->hasUnflushedCommands = GL_FALSE0x0; |
250 | |
251 | /* Send empty reply packet to indicate finish is finished */ |
252 | client = cl->client; |
253 | __GLX_BEGIN_REPLY(0)__glXReply.length = (((0)+3) & (GLuint)~3) >> 2; __glXReply .type = 1; __glXReply.sequenceNumber = client->sequence;; |
254 | __GLX_SEND_HEADER()WriteToClient (client, 32, &__glXReply);; |
255 | return Success0; |
256 | } |
257 | |
258 | #define SEPARATOR" " " " |
259 | |
260 | char * |
261 | __glXcombine_strings(const char *cext_string, const char *sext_string) |
262 | { |
263 | size_t clen, slen; |
264 | char *combo_string, *token, *s1; |
265 | const char *s2, *end; |
266 | |
267 | /* safeguard to prevent potentially fatal errors in the string functions */ |
268 | if (!cext_string) |
269 | cext_string = ""; |
270 | if (!sext_string) |
271 | sext_string = ""; |
272 | |
273 | /* |
274 | ** String can't be longer than min(cstring, sstring) |
275 | ** pull tokens out of shortest string |
276 | ** include space in combo_string for final separator and null terminator |
277 | */ |
278 | clen = strlen(cext_string); |
279 | slen = strlen(sext_string); |
280 | if (clen > slen) { |
281 | combo_string = (char *) malloc(slen + 2); |
282 | s1 = (char *) malloc(slen + 2); |
283 | if (s1) |
284 | strcpy(s1, sext_string)__builtin___strcpy_chk (s1, sext_string, __builtin_object_size (s1, 2 > 1 ? 1 : 0)); |
285 | s2 = cext_string; |
286 | } |
287 | else { |
288 | combo_string = (char *) malloc(clen + 2); |
289 | s1 = (char *) malloc(clen + 2); |
290 | if (s1) |
291 | strcpy(s1, cext_string)__builtin___strcpy_chk (s1, cext_string, __builtin_object_size (s1, 2 > 1 ? 1 : 0)); |
292 | s2 = sext_string; |
293 | } |
294 | if (!combo_string || !s1) { |
295 | free(combo_string); |
296 | free(s1); |
297 | return NULL((void*)0); |
298 | } |
299 | combo_string[0] = '\0'; |
300 | |
301 | /* Get first extension token */ |
302 | token = strtok(s1, SEPARATOR" "); |
303 | while (token != NULL((void*)0)) { |
304 | |
305 | /* |
306 | ** if token in second string then save it |
307 | ** beware of extension names which are prefixes of other extension names |
308 | */ |
309 | const char *p = s2; |
310 | |
311 | end = p + strlen(p); |
312 | while (p < end) { |
313 | size_t n = strcspn(p, SEPARATOR" "); |
314 | |
315 | if ((strlen(token) == n) && (strncmp(token, p, n) == 0)) { |
316 | combo_string = strcat(combo_string, token)__builtin___strcat_chk (combo_string, token, __builtin_object_size (combo_string, 2 > 1 ? 1 : 0)); |
317 | combo_string = strcat(combo_string, SEPARATOR)__builtin___strcat_chk (combo_string, " ", __builtin_object_size (combo_string, 2 > 1 ? 1 : 0)); |
318 | } |
319 | p += (n + 1); |
320 | } |
321 | |
322 | /* Get next extension token */ |
323 | token = strtok(NULL((void*)0), SEPARATOR" "); |
324 | } |
325 | free(s1); |
326 | return combo_string; |
327 | } |
328 | |
329 | int |
330 | DoGetString(__GLXclientState * cl, GLbyte * pc, GLboolean need_swap) |
331 | { |
332 | ClientPtr client = cl->client; |
333 | __GLXcontext *cx; |
334 | GLenum name; |
335 | const char *string; |
336 | |
337 | __GLX_DECLARE_SWAP_VARIABLESGLbyte sw; |
338 | int error; |
339 | char *buf = NULL((void*)0), *buf1 = NULL((void*)0); |
340 | GLint length = 0; |
341 | |
342 | 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); |
343 | |
344 | /* If the client has the opposite byte order, swap the contextTag and |
345 | * the name. |
346 | */ |
347 | if (need_swap) { |
348 | __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;; |
349 | __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;; |
350 | } |
351 | |
352 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
353 | if (!cx) { |
354 | return error; |
355 | } |
356 | |
357 | pc += __GLX_SINGLE_HDR_SIZE8; |
358 | name = *(GLenum *) (pc + 0); |
359 | string = (const char *) glGetString(name); |
360 | |
361 | if (string == NULL((void*)0)) |
362 | string = ""; |
363 | |
364 | /* |
365 | ** Restrict extensions to those that are supported by both the |
366 | ** implementation and the connection. That is, return the |
367 | ** intersection of client, server, and core extension strings. |
368 | */ |
369 | if (name == GL_EXTENSIONS0x1F03) { |
370 | buf1 = __glXcombine_strings(string, cl->GLClientextensions); |
371 | buf = __glXcombine_strings(buf1, cx->pGlxScreen->GLextensions); |
372 | free(buf1); |
373 | string = buf; |
374 | } |
375 | else if (name == GL_VERSION0x1F02) { |
376 | if (atof(string) > atof(GLServerVersion)) { |
377 | if (asprintf(&buf, "%s (%s)", GLServerVersion, string) == -1) { |
378 | string = GLServerVersion; |
379 | } |
380 | else { |
381 | string = buf; |
382 | } |
383 | } |
384 | } |
385 | if (string) { |
386 | length = strlen((const char *) string) + 1; |
387 | } |
388 | |
389 | __GLX_BEGIN_REPLY(length)__glXReply.length = (((length)+3) & (GLuint)~3) >> 2 ; __glXReply.type = 1; __glXReply.sequenceNumber = client-> sequence;; |
390 | __GLX_PUT_SIZE(length)__glXReply.size = (length);; |
391 | |
392 | if (need_swap) { |
393 | __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;; |
394 | __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;;; |
395 | } |
396 | |
397 | __GLX_SEND_HEADER()WriteToClient (client, 32, &__glXReply);; |
398 | WriteToClient(client, length, string); |
399 | free(buf); |
400 | |
401 | return Success0; |
402 | } |
403 | |
404 | int |
405 | __glXDisp_GetString(__GLXclientState * cl, GLbyte * pc) |
406 | { |
407 | return DoGetString(cl, pc, GL_FALSE0x0); |
408 | } |