| 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 | } |