File: | glx/single2swap.c |
Location: | line 185, 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 "glxserver.h" |
36 | #include "glxutil.h" |
37 | #include "glxext.h" |
38 | #include "indirect_dispatch.h" |
39 | #include "unpack.h" |
40 | |
41 | int |
42 | __glXDispSwap_FeedbackBuffer(__GLXclientState * cl, GLbyte * pc) |
43 | { |
44 | ClientPtr client = cl->client; |
45 | GLsizei size; |
46 | GLenum type; |
47 | |
48 | __GLX_DECLARE_SWAP_VARIABLESGLbyte sw; |
49 | __GLXcontext *cx; |
50 | int error; |
51 | |
52 | 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); |
53 | |
54 | __GLX_SWAP_INT(&((xGLXSingleReq *) pc)->contextTag)sw = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag)) [0]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag)) [0] = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag) )[3]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag) )[3] = sw; sw = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[1]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[1] = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[2]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[2] = sw;; |
55 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
56 | if (!cx) { |
57 | return error; |
58 | } |
59 | |
60 | pc += __GLX_SINGLE_HDR_SIZE8; |
61 | __GLX_SWAP_INT(pc + 0)sw = ((GLbyte *)(pc + 0))[0]; ((GLbyte *)(pc + 0))[0] = ((GLbyte *)(pc + 0))[3]; ((GLbyte *)(pc + 0))[3] = sw; sw = ((GLbyte * )(pc + 0))[1]; ((GLbyte *)(pc + 0))[1] = ((GLbyte *)(pc + 0)) [2]; ((GLbyte *)(pc + 0))[2] = sw;; |
62 | __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;; |
63 | size = *(GLsizei *) (pc + 0); |
64 | type = *(GLenum *) (pc + 4); |
65 | if (cx->feedbackBufSize < size) { |
66 | cx->feedbackBuf = reallocarrayxreallocarray(cx->feedbackBuf, |
67 | (size_t) size, __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 | return Success0; |
76 | } |
77 | |
78 | int |
79 | __glXDispSwap_SelectBuffer(__GLXclientState * cl, GLbyte * pc) |
80 | { |
81 | ClientPtr client = cl->client; |
82 | __GLXcontext *cx; |
83 | GLsizei size; |
84 | |
85 | __GLX_DECLARE_SWAP_VARIABLESGLbyte sw; |
86 | int error; |
87 | |
88 | 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); |
89 | |
90 | __GLX_SWAP_INT(&((xGLXSingleReq *) pc)->contextTag)sw = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag)) [0]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag)) [0] = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag) )[3]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag) )[3] = sw; sw = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[1]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[1] = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[2]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[2] = sw;; |
91 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
92 | if (!cx) { |
93 | return error; |
94 | } |
95 | |
96 | pc += __GLX_SINGLE_HDR_SIZE8; |
97 | __GLX_SWAP_INT(pc + 0)sw = ((GLbyte *)(pc + 0))[0]; ((GLbyte *)(pc + 0))[0] = ((GLbyte *)(pc + 0))[3]; ((GLbyte *)(pc + 0))[3] = sw; sw = ((GLbyte * )(pc + 0))[1]; ((GLbyte *)(pc + 0))[1] = ((GLbyte *)(pc + 0)) [2]; ((GLbyte *)(pc + 0))[2] = sw;; |
98 | size = *(GLsizei *) (pc + 0); |
99 | if (cx->selectBufSize < size) { |
100 | cx->selectBuf = reallocarrayxreallocarray(cx->selectBuf, |
101 | (size_t) size, __GLX_SIZE_CARD324); |
102 | if (!cx->selectBuf) { |
103 | cl->client->errorValue = size; |
104 | return BadAlloc11; |
105 | } |
106 | cx->selectBufSize = size; |
107 | } |
108 | glSelectBuffer(size, cx->selectBuf); |
109 | return Success0; |
110 | } |
111 | |
112 | int |
113 | __glXDispSwap_RenderMode(__GLXclientState * cl, GLbyte * pc) |
114 | { |
115 | ClientPtr client = cl->client; |
116 | __GLXcontext *cx; |
117 | xGLXRenderModeReply reply; |
118 | GLint nitems = 0, retBytes = 0, retval, newModeCheck; |
119 | GLubyte *retBuffer = NULL((void*)0); |
120 | GLenum newMode; |
121 | |
122 | __GLX_DECLARE_SWAP_VARIABLESGLbyte sw; |
123 | __GLX_DECLARE_SWAP_ARRAY_VARIABLESGLbyte *swapPC; GLbyte *swapEnd; |
124 | int error; |
125 | |
126 | 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); |
127 | |
128 | __GLX_SWAP_INT(&((xGLXSingleReq *) pc)->contextTag)sw = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag)) [0]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag)) [0] = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag) )[3]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag) )[3] = sw; sw = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[1]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[1] = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[2]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[2] = sw;; |
129 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
130 | if (!cx) { |
131 | return error; |
132 | } |
133 | |
134 | pc += __GLX_SINGLE_HDR_SIZE8; |
135 | __GLX_SWAP_INT(pc)sw = ((GLbyte *)(pc))[0]; ((GLbyte *)(pc))[0] = ((GLbyte *)(pc ))[3]; ((GLbyte *)(pc))[3] = sw; sw = ((GLbyte *)(pc))[1]; (( GLbyte *)(pc))[1] = ((GLbyte *)(pc))[2]; ((GLbyte *)(pc))[2] = sw;; |
136 | newMode = *(GLenum *) pc; |
137 | retval = glRenderMode(newMode); |
138 | |
139 | /* Check that render mode worked */ |
140 | glGetIntegerv(GL_RENDER_MODE0x0C40, &newModeCheck); |
141 | if (newModeCheck != newMode) { |
142 | /* Render mode change failed. Bail */ |
143 | newMode = newModeCheck; |
144 | goto noChangeAllowed; |
145 | } |
146 | |
147 | /* |
148 | ** Render mode might have still failed if we get here. But in this |
149 | ** case we can't really tell, nor does it matter. If it did fail, it |
150 | ** will return 0, and thus we won't send any data across the wire. |
151 | */ |
152 | |
153 | switch (cx->renderMode) { |
154 | case GL_RENDER0x1C00: |
155 | cx->renderMode = newMode; |
156 | break; |
157 | case GL_FEEDBACK0x1C01: |
158 | if (retval < 0) { |
159 | /* Overflow happened. Copy the entire buffer */ |
160 | nitems = cx->feedbackBufSize; |
161 | } |
162 | else { |
163 | nitems = retval; |
164 | } |
165 | retBytes = nitems * __GLX_SIZE_FLOAT324; |
166 | retBuffer = (GLubyte *) cx->feedbackBuf; |
167 | __GLX_SWAP_FLOAT_ARRAY((GLbyte *) retBuffer, nitems)swapPC = ((GLbyte *)((GLbyte *) retBuffer)); swapEnd = ((GLbyte *)((GLbyte *) retBuffer)) + (nitems)*4; while (swapPC < swapEnd ) { sw = ((GLbyte *)(swapPC))[0]; ((GLbyte *)(swapPC))[0] = ( (GLbyte *)(swapPC))[3]; ((GLbyte *)(swapPC))[3] = sw; sw = (( GLbyte *)(swapPC))[1]; ((GLbyte *)(swapPC))[1] = ((GLbyte *)( swapPC))[2]; ((GLbyte *)(swapPC))[2] = sw;; swapPC += 4; }; |
168 | cx->renderMode = newMode; |
169 | break; |
170 | case GL_SELECT0x1C02: |
171 | if (retval < 0) { |
172 | /* Overflow happened. Copy the entire buffer */ |
173 | nitems = cx->selectBufSize; |
174 | } |
175 | else { |
176 | GLuint *bp = cx->selectBuf; |
177 | GLint i; |
178 | |
179 | /* |
180 | ** Figure out how many bytes of data need to be sent. Parse |
181 | ** the selection buffer to determine this fact as the |
182 | ** return value is the number of hits, not the number of |
183 | ** items in the buffer. |
184 | */ |
185 | nitems = 0; |
Value stored to 'nitems' is never read | |
186 | i = retval; |
187 | while (--i >= 0) { |
188 | GLuint n; |
189 | |
190 | /* Parse select data for this hit */ |
191 | n = *bp; |
192 | bp += 3 + n; |
193 | } |
194 | nitems = bp - cx->selectBuf; |
195 | } |
196 | retBytes = nitems * __GLX_SIZE_CARD324; |
197 | retBuffer = (GLubyte *) cx->selectBuf; |
198 | __GLX_SWAP_INT_ARRAY((GLbyte *) retBuffer, nitems)swapPC = ((GLbyte *)((GLbyte *) retBuffer)); swapEnd = ((GLbyte *)((GLbyte *) retBuffer)) + (nitems)*4; while (swapPC < swapEnd ) { sw = ((GLbyte *)(swapPC))[0]; ((GLbyte *)(swapPC))[0] = ( (GLbyte *)(swapPC))[3]; ((GLbyte *)(swapPC))[3] = sw; sw = (( GLbyte *)(swapPC))[1]; ((GLbyte *)(swapPC))[1] = ((GLbyte *)( swapPC))[2]; ((GLbyte *)(swapPC))[2] = sw;; swapPC += 4; }; |
199 | cx->renderMode = newMode; |
200 | break; |
201 | } |
202 | |
203 | /* |
204 | ** First reply is the number of elements returned in the feedback or |
205 | ** selection array, as per the API for glRenderMode itself. |
206 | */ |
207 | noChangeAllowed:; |
208 | reply = (xGLXRenderModeReply) { |
209 | .type = X_Reply1, |
210 | .sequenceNumber = client->sequence, |
211 | .length = nitems, |
212 | .retval = retval, |
213 | .size = nitems, |
214 | .newMode = newMode |
215 | }; |
216 | __GLX_SWAP_SHORT(&reply.sequenceNumber)sw = ((GLbyte *)(&reply.sequenceNumber))[0]; ((GLbyte *)( &reply.sequenceNumber))[0] = ((GLbyte *)(&reply.sequenceNumber ))[1]; ((GLbyte *)(&reply.sequenceNumber))[1] = sw;; |
217 | __GLX_SWAP_INT(&reply.length)sw = ((GLbyte *)(&reply.length))[0]; ((GLbyte *)(&reply .length))[0] = ((GLbyte *)(&reply.length))[3]; ((GLbyte * )(&reply.length))[3] = sw; sw = ((GLbyte *)(&reply.length ))[1]; ((GLbyte *)(&reply.length))[1] = ((GLbyte *)(& reply.length))[2]; ((GLbyte *)(&reply.length))[2] = sw;; |
218 | __GLX_SWAP_INT(&reply.retval)sw = ((GLbyte *)(&reply.retval))[0]; ((GLbyte *)(&reply .retval))[0] = ((GLbyte *)(&reply.retval))[3]; ((GLbyte * )(&reply.retval))[3] = sw; sw = ((GLbyte *)(&reply.retval ))[1]; ((GLbyte *)(&reply.retval))[1] = ((GLbyte *)(& reply.retval))[2]; ((GLbyte *)(&reply.retval))[2] = sw;; |
219 | __GLX_SWAP_INT(&reply.size)sw = ((GLbyte *)(&reply.size))[0]; ((GLbyte *)(&reply .size))[0] = ((GLbyte *)(&reply.size))[3]; ((GLbyte *)(& reply.size))[3] = sw; sw = ((GLbyte *)(&reply.size))[1]; ( (GLbyte *)(&reply.size))[1] = ((GLbyte *)(&reply.size ))[2]; ((GLbyte *)(&reply.size))[2] = sw;; |
220 | __GLX_SWAP_INT(&reply.newMode)sw = ((GLbyte *)(&reply.newMode))[0]; ((GLbyte *)(&reply .newMode))[0] = ((GLbyte *)(&reply.newMode))[3]; ((GLbyte *)(&reply.newMode))[3] = sw; sw = ((GLbyte *)(&reply .newMode))[1]; ((GLbyte *)(&reply.newMode))[1] = ((GLbyte *)(&reply.newMode))[2]; ((GLbyte *)(&reply.newMode)) [2] = sw;; |
221 | WriteToClient(client, sz_xGLXRenderModeReply32, &reply); |
222 | if (retBytes) { |
223 | WriteToClient(client, retBytes, retBuffer); |
224 | } |
225 | return Success0; |
226 | } |
227 | |
228 | int |
229 | __glXDispSwap_Flush(__GLXclientState * cl, GLbyte * pc) |
230 | { |
231 | ClientPtr client = cl->client; |
232 | __GLXcontext *cx; |
233 | int error; |
234 | |
235 | __GLX_DECLARE_SWAP_VARIABLESGLbyte sw; |
236 | |
237 | REQUEST_SIZE_MATCH(xGLXSingleReq)if ((sizeof(xGLXSingleReq) >> 2) != client->req_len) return(16); |
238 | |
239 | __GLX_SWAP_INT(&((xGLXSingleReq *) pc)->contextTag)sw = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag)) [0]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag)) [0] = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag) )[3]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag) )[3] = sw; sw = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[1]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[1] = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[2]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[2] = sw;; |
240 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
241 | if (!cx) { |
242 | return error; |
243 | } |
244 | |
245 | glFlush(); |
246 | return Success0; |
247 | } |
248 | |
249 | int |
250 | __glXDispSwap_Finish(__GLXclientState * cl, GLbyte * pc) |
251 | { |
252 | ClientPtr client = cl->client; |
253 | __GLXcontext *cx; |
254 | int error; |
255 | |
256 | __GLX_DECLARE_SWAP_VARIABLESGLbyte sw; |
257 | |
258 | REQUEST_SIZE_MATCH(xGLXSingleReq)if ((sizeof(xGLXSingleReq) >> 2) != client->req_len) return(16); |
259 | |
260 | __GLX_SWAP_INT(&((xGLXSingleReq *) pc)->contextTag)sw = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag)) [0]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag)) [0] = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag) )[3]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag) )[3] = sw; sw = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[1]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[1] = ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[2]; ((GLbyte *)(&((xGLXSingleReq *) pc)->contextTag ))[2] = sw;; |
261 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc)(((xGLXSingleReq*)pc)->contextTag), &error); |
262 | if (!cx) { |
263 | return error; |
264 | } |
265 | |
266 | /* Do a local glFinish */ |
267 | glFinish(); |
268 | |
269 | /* Send empty reply packet to indicate finish is finished */ |
270 | __GLX_BEGIN_REPLY(0)__glXReply.length = (((0)+3) & (GLuint)~3) >> 2; __glXReply .type = 1; __glXReply.sequenceNumber = client->sequence;; |
271 | __GLX_PUT_RETVAL(0)__glXReply.retval = (0);; |
272 | __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;;; |
273 | __GLX_SEND_HEADER()WriteToClient (client, 32, &__glXReply);; |
274 | |
275 | return Success0; |
276 | } |
277 | |
278 | int |
279 | __glXDispSwap_GetString(__GLXclientState * cl, GLbyte * pc) |
280 | { |
281 | return DoGetString(cl, pc, GL_TRUE0x1); |
282 | } |