1 #ifndef CURLINC_TYPECHECK_GCC_H 2 #define CURLINC_TYPECHECK_GCC_H 3 /*************************************************************************** 4 * _ _ ____ _ 5 * Project ___| | | | _ \| | 6 * / __| | | | |_) | | 7 * | (__| |_| | _ <| |___ 8 * \___|\___/|_| \_\_____| 9 * 10 * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al. 11 * 12 * This software is licensed as described in the file COPYING, which 13 * you should have received as part of this distribution. The terms 14 * are also available at https://curl.haxx.se/docs/copyright.html. 15 * 16 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 17 * copies of the Software, and permit persons to whom the Software is 18 * furnished to do so, under the terms of the COPYING file. 19 * 20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 21 * KIND, either express or implied. 22 * 23 ***************************************************************************/ 24 25 /* wraps curl_easy_setopt() with typechecking */ 26 27 /* To add a new kind of warning, add an 28 * if(curlcheck_sometype_option(_curl_opt)) 29 * if(!curlcheck_sometype(value)) 30 * _curl_easy_setopt_err_sometype(); 31 * block and define curlcheck_sometype_option, curlcheck_sometype and 32 * _curl_easy_setopt_err_sometype below 33 * 34 * NOTE: We use two nested 'if' statements here instead of the && operator, in 35 * order to work around gcc bug #32061. It affects only gcc 4.3.x/4.4.x 36 * when compiling with -Wlogical-op. 37 * 38 * To add an option that uses the same type as an existing option, you'll just 39 * need to extend the appropriate _curl_*_option macro 40 */ 41 #define curl_easy_setopt(handle, option, value) \ 42 __extension__({ \ 43 __typeof__(option) _curl_opt = option; \ 44 if(__builtin_constant_p(_curl_opt)) { \ 45 if(curlcheck_long_option(_curl_opt)) \ 46 if(!curlcheck_long(value)) \ 47 _curl_easy_setopt_err_long(); \ 48 if(curlcheck_off_t_option(_curl_opt)) \ 49 if(!curlcheck_off_t(value)) \ 50 _curl_easy_setopt_err_curl_off_t(); \ 51 if(curlcheck_string_option(_curl_opt)) \ 52 if(!curlcheck_string(value)) \ 53 _curl_easy_setopt_err_string(); \ 54 if(curlcheck_write_cb_option(_curl_opt)) \ 55 if(!curlcheck_write_cb(value)) \ 56 _curl_easy_setopt_err_write_callback(); \ 57 if((_curl_opt) == CURLOPT_RESOLVER_START_FUNCTION) \ 58 if(!curlcheck_resolver_start_callback(value)) \ 59 _curl_easy_setopt_err_resolver_start_callback(); \ 60 if((_curl_opt) == CURLOPT_READFUNCTION) \ 61 if(!curlcheck_read_cb(value)) \ 62 _curl_easy_setopt_err_read_cb(); \ 63 if((_curl_opt) == CURLOPT_IOCTLFUNCTION) \ 64 if(!curlcheck_ioctl_cb(value)) \ 65 _curl_easy_setopt_err_ioctl_cb(); \ 66 if((_curl_opt) == CURLOPT_SOCKOPTFUNCTION) \ 67 if(!curlcheck_sockopt_cb(value)) \ 68 _curl_easy_setopt_err_sockopt_cb(); \ 69 if((_curl_opt) == CURLOPT_OPENSOCKETFUNCTION) \ 70 if(!curlcheck_opensocket_cb(value)) \ 71 _curl_easy_setopt_err_opensocket_cb(); \ 72 if((_curl_opt) == CURLOPT_PROGRESSFUNCTION) \ 73 if(!curlcheck_progress_cb(value)) \ 74 _curl_easy_setopt_err_progress_cb(); \ 75 if((_curl_opt) == CURLOPT_DEBUGFUNCTION) \ 76 if(!curlcheck_debug_cb(value)) \ 77 _curl_easy_setopt_err_debug_cb(); \ 78 if((_curl_opt) == CURLOPT_SSL_CTX_FUNCTION) \ 79 if(!curlcheck_ssl_ctx_cb(value)) \ 80 _curl_easy_setopt_err_ssl_ctx_cb(); \ 81 if(curlcheck_conv_cb_option(_curl_opt)) \ 82 if(!curlcheck_conv_cb(value)) \ 83 _curl_easy_setopt_err_conv_cb(); \ 84 if((_curl_opt) == CURLOPT_SEEKFUNCTION) \ 85 if(!curlcheck_seek_cb(value)) \ 86 _curl_easy_setopt_err_seek_cb(); \ 87 if(curlcheck_cb_data_option(_curl_opt)) \ 88 if(!curlcheck_cb_data(value)) \ 89 _curl_easy_setopt_err_cb_data(); \ 90 if((_curl_opt) == CURLOPT_ERRORBUFFER) \ 91 if(!curlcheck_error_buffer(value)) \ 92 _curl_easy_setopt_err_error_buffer(); \ 93 if((_curl_opt) == CURLOPT_STDERR) \ 94 if(!curlcheck_FILE(value)) \ 95 _curl_easy_setopt_err_FILE(); \ 96 if(curlcheck_postfields_option(_curl_opt)) \ 97 if(!curlcheck_postfields(value)) \ 98 _curl_easy_setopt_err_postfields(); \ 99 if((_curl_opt) == CURLOPT_HTTPPOST) \ 100 if(!curlcheck_arr((value), struct curl_httppost)) \ 101 _curl_easy_setopt_err_curl_httpost(); \ 102 if((_curl_opt) == CURLOPT_MIMEPOST) \ 103 if(!curlcheck_ptr((value), curl_mime)) \ 104 _curl_easy_setopt_err_curl_mimepost(); \ 105 if(curlcheck_slist_option(_curl_opt)) \ 106 if(!curlcheck_arr((value), struct curl_slist)) \ 107 _curl_easy_setopt_err_curl_slist(); \ 108 if((_curl_opt) == CURLOPT_SHARE) \ 109 if(!curlcheck_ptr((value), CURLSH)) \ 110 _curl_easy_setopt_err_CURLSH(); \ 111 } \ 112 curl_easy_setopt(handle, _curl_opt, value); \ 113 }) 114 115 /* wraps curl_easy_getinfo() with typechecking */ 116 #define curl_easy_getinfo(handle, info, arg) \ 117 __extension__({ \ 118 __typeof__(info) _curl_info = info; \ 119 if(__builtin_constant_p(_curl_info)) { \ 120 if(curlcheck_string_info(_curl_info)) \ 121 if(!curlcheck_arr((arg), char *)) \ 122 _curl_easy_getinfo_err_string(); \ 123 if(curlcheck_long_info(_curl_info)) \ 124 if(!curlcheck_arr((arg), long)) \ 125 _curl_easy_getinfo_err_long(); \ 126 if(curlcheck_double_info(_curl_info)) \ 127 if(!curlcheck_arr((arg), double)) \ 128 _curl_easy_getinfo_err_double(); \ 129 if(curlcheck_slist_info(_curl_info)) \ 130 if(!curlcheck_arr((arg), struct curl_slist *)) \ 131 _curl_easy_getinfo_err_curl_slist(); \ 132 if(curlcheck_tlssessioninfo_info(_curl_info)) \ 133 if(!curlcheck_arr((arg), struct curl_tlssessioninfo *)) \ 134 _curl_easy_getinfo_err_curl_tlssesssioninfo(); \ 135 if(curlcheck_certinfo_info(_curl_info)) \ 136 if(!curlcheck_arr((arg), struct curl_certinfo *)) \ 137 _curl_easy_getinfo_err_curl_certinfo(); \ 138 if(curlcheck_socket_info(_curl_info)) \ 139 if(!curlcheck_arr((arg), curl_socket_t)) \ 140 _curl_easy_getinfo_err_curl_socket(); \ 141 if(curlcheck_off_t_info(_curl_info)) \ 142 if(!curlcheck_arr((arg), curl_off_t)) \ 143 _curl_easy_getinfo_err_curl_off_t(); \ 144 } \ 145 curl_easy_getinfo(handle, _curl_info, arg); \ 146 }) 147 148 /* 149 * For now, just make sure that the functions are called with three arguments 150 */ 151 #define curl_share_setopt(share,opt,param) curl_share_setopt(share,opt,param) 152 #define curl_multi_setopt(handle,opt,param) curl_multi_setopt(handle,opt,param) 153 154 155 /* the actual warnings, triggered by calling the _curl_easy_setopt_err* 156 * functions */ 157 158 /* To define a new warning, use _CURL_WARNING(identifier, "message") */ 159 #define CURLWARNING(id, message) \ 160 static void __attribute__((__warning__(message))) \ 161 __attribute__((__unused__)) __attribute__((__noinline__)) \ 162 id(void) { __asm__(""); } 163 164 CURLWARNING(_curl_easy_setopt_err_long, 165 "curl_easy_setopt expects a long argument for this option") 166 CURLWARNING(_curl_easy_setopt_err_curl_off_t, 167 "curl_easy_setopt expects a curl_off_t argument for this option") 168 CURLWARNING(_curl_easy_setopt_err_string, 169 "curl_easy_setopt expects a " 170 "string ('char *' or char[]) argument for this option" 171 ) 172 CURLWARNING(_curl_easy_setopt_err_write_callback, 173 "curl_easy_setopt expects a curl_write_callback argument for this option") 174 CURLWARNING(_curl_easy_setopt_err_resolver_start_callback, 175 "curl_easy_setopt expects a " 176 "curl_resolver_start_callback argument for this option" 177 ) 178 CURLWARNING(_curl_easy_setopt_err_read_cb, 179 "curl_easy_setopt expects a curl_read_callback argument for this option") 180 CURLWARNING(_curl_easy_setopt_err_ioctl_cb, 181 "curl_easy_setopt expects a curl_ioctl_callback argument for this option") 182 CURLWARNING(_curl_easy_setopt_err_sockopt_cb, 183 "curl_easy_setopt expects a curl_sockopt_callback argument for this option") 184 CURLWARNING(_curl_easy_setopt_err_opensocket_cb, 185 "curl_easy_setopt expects a " 186 "curl_opensocket_callback argument for this option" 187 ) 188 CURLWARNING(_curl_easy_setopt_err_progress_cb, 189 "curl_easy_setopt expects a curl_progress_callback argument for this option") 190 CURLWARNING(_curl_easy_setopt_err_debug_cb, 191 "curl_easy_setopt expects a curl_debug_callback argument for this option") 192 CURLWARNING(_curl_easy_setopt_err_ssl_ctx_cb, 193 "curl_easy_setopt expects a curl_ssl_ctx_callback argument for this option") 194 CURLWARNING(_curl_easy_setopt_err_conv_cb, 195 "curl_easy_setopt expects a curl_conv_callback argument for this option") 196 CURLWARNING(_curl_easy_setopt_err_seek_cb, 197 "curl_easy_setopt expects a curl_seek_callback argument for this option") 198 CURLWARNING(_curl_easy_setopt_err_cb_data, 199 "curl_easy_setopt expects a " 200 "private data pointer as argument for this option") 201 CURLWARNING(_curl_easy_setopt_err_error_buffer, 202 "curl_easy_setopt expects a " 203 "char buffer of CURL_ERROR_SIZE as argument for this option") 204 CURLWARNING(_curl_easy_setopt_err_FILE, 205 "curl_easy_setopt expects a 'FILE *' argument for this option") 206 CURLWARNING(_curl_easy_setopt_err_postfields, 207 "curl_easy_setopt expects a 'void *' or 'char *' argument for this option") 208 CURLWARNING(_curl_easy_setopt_err_curl_httpost, 209 "curl_easy_setopt expects a 'struct curl_httppost *' " 210 "argument for this option") 211 CURLWARNING(_curl_easy_setopt_err_curl_mimepost, 212 "curl_easy_setopt expects a 'curl_mime *' " 213 "argument for this option") 214 CURLWARNING(_curl_easy_setopt_err_curl_slist, 215 "curl_easy_setopt expects a 'struct curl_slist *' argument for this option") 216 CURLWARNING(_curl_easy_setopt_err_CURLSH, 217 "curl_easy_setopt expects a CURLSH* argument for this option") 218 219 CURLWARNING(_curl_easy_getinfo_err_string, 220 "curl_easy_getinfo expects a pointer to 'char *' for this info") 221 CURLWARNING(_curl_easy_getinfo_err_long, 222 "curl_easy_getinfo expects a pointer to long for this info") 223 CURLWARNING(_curl_easy_getinfo_err_double, 224 "curl_easy_getinfo expects a pointer to double for this info") 225 CURLWARNING(_curl_easy_getinfo_err_curl_slist, 226 "curl_easy_getinfo expects a pointer to 'struct curl_slist *' for this info") 227 CURLWARNING(_curl_easy_getinfo_err_curl_tlssesssioninfo, 228 "curl_easy_getinfo expects a pointer to " 229 "'struct curl_tlssessioninfo *' for this info") 230 CURLWARNING(_curl_easy_getinfo_err_curl_certinfo, 231 "curl_easy_getinfo expects a pointer to " 232 "'struct curl_certinfo *' for this info") 233 CURLWARNING(_curl_easy_getinfo_err_curl_socket, 234 "curl_easy_getinfo expects a pointer to curl_socket_t for this info") 235 CURLWARNING(_curl_easy_getinfo_err_curl_off_t, 236 "curl_easy_getinfo expects a pointer to curl_off_t for this info") 237 238 /* groups of curl_easy_setops options that take the same type of argument */ 239 240 /* To add a new option to one of the groups, just add 241 * (option) == CURLOPT_SOMETHING 242 * to the or-expression. If the option takes a long or curl_off_t, you don't 243 * have to do anything 244 */ 245 246 /* evaluates to true if option takes a long argument */ 247 #define curlcheck_long_option(option) \ 248 (0 < (option) && (option) < CURLOPTTYPE_OBJECTPOINT) 249 250 #define curlcheck_off_t_option(option) \ 251 (((option) > CURLOPTTYPE_OFF_T) && ((option) < CURLOPTTYPE_BLOB)) 252 253 /* evaluates to true if option takes a char* argument */ 254 #define curlcheck_string_option(option) \ 255 ((option) == CURLOPT_ABSTRACT_UNIX_SOCKET || \ 256 (option) == CURLOPT_ACCEPT_ENCODING || \ 257 (option) == CURLOPT_ALTSVC || \ 258 (option) == CURLOPT_CAINFO || \ 259 (option) == CURLOPT_CAPATH || \ 260 (option) == CURLOPT_COOKIE || \ 261 (option) == CURLOPT_COOKIEFILE || \ 262 (option) == CURLOPT_COOKIEJAR || \ 263 (option) == CURLOPT_COOKIELIST || \ 264 (option) == CURLOPT_CRLFILE || \ 265 (option) == CURLOPT_CUSTOMREQUEST || \ 266 (option) == CURLOPT_DEFAULT_PROTOCOL || \ 267 (option) == CURLOPT_DNS_INTERFACE || \ 268 (option) == CURLOPT_DNS_LOCAL_IP4 || \ 269 (option) == CURLOPT_DNS_LOCAL_IP6 || \ 270 (option) == CURLOPT_DNS_SERVERS || \ 271 (option) == CURLOPT_DOH_URL || \ 272 (option) == CURLOPT_EGDSOCKET || \ 273 (option) == CURLOPT_FTPPORT || \ 274 (option) == CURLOPT_FTP_ACCOUNT || \ 275 (option) == CURLOPT_FTP_ALTERNATIVE_TO_USER || \ 276 (option) == CURLOPT_INTERFACE || \ 277 (option) == CURLOPT_ISSUERCERT || \ 278 (option) == CURLOPT_KEYPASSWD || \ 279 (option) == CURLOPT_KRBLEVEL || \ 280 (option) == CURLOPT_LOGIN_OPTIONS || \ 281 (option) == CURLOPT_MAIL_AUTH || \ 282 (option) == CURLOPT_MAIL_FROM || \ 283 (option) == CURLOPT_NETRC_FILE || \ 284 (option) == CURLOPT_NOPROXY || \ 285 (option) == CURLOPT_PASSWORD || \ 286 (option) == CURLOPT_PINNEDPUBLICKEY || \ 287 (option) == CURLOPT_PRE_PROXY || \ 288 (option) == CURLOPT_PROXY || \ 289 (option) == CURLOPT_PROXYPASSWORD || \ 290 (option) == CURLOPT_PROXYUSERNAME || \ 291 (option) == CURLOPT_PROXYUSERPWD || \ 292 (option) == CURLOPT_PROXY_CAINFO || \ 293 (option) == CURLOPT_PROXY_CAPATH || \ 294 (option) == CURLOPT_PROXY_CRLFILE || \ 295 (option) == CURLOPT_PROXY_KEYPASSWD || \ 296 (option) == CURLOPT_PROXY_PINNEDPUBLICKEY || \ 297 (option) == CURLOPT_PROXY_SERVICE_NAME || \ 298 (option) == CURLOPT_PROXY_SSLCERT || \ 299 (option) == CURLOPT_PROXY_SSLCERTTYPE || \ 300 (option) == CURLOPT_PROXY_SSLKEY || \ 301 (option) == CURLOPT_PROXY_SSLKEYTYPE || \ 302 (option) == CURLOPT_PROXY_SSL_CIPHER_LIST || \ 303 (option) == CURLOPT_PROXY_TLS13_CIPHERS || \ 304 (option) == CURLOPT_PROXY_TLSAUTH_PASSWORD || \ 305 (option) == CURLOPT_PROXY_TLSAUTH_TYPE || \ 306 (option) == CURLOPT_PROXY_TLSAUTH_USERNAME || \ 307 (option) == CURLOPT_RANDOM_FILE || \ 308 (option) == CURLOPT_RANGE || \ 309 (option) == CURLOPT_REFERER || \ 310 (option) == CURLOPT_REQUEST_TARGET || \ 311 (option) == CURLOPT_RTSP_SESSION_ID || \ 312 (option) == CURLOPT_RTSP_STREAM_URI || \ 313 (option) == CURLOPT_RTSP_TRANSPORT || \ 314 (option) == CURLOPT_SASL_AUTHZID || \ 315 (option) == CURLOPT_SERVICE_NAME || \ 316 (option) == CURLOPT_SOCKS5_GSSAPI_SERVICE || \ 317 (option) == CURLOPT_SSH_HOST_PUBLIC_KEY_MD5 || \ 318 (option) == CURLOPT_SSH_KNOWNHOSTS || \ 319 (option) == CURLOPT_SSH_PRIVATE_KEYFILE || \ 320 (option) == CURLOPT_SSH_PUBLIC_KEYFILE || \ 321 (option) == CURLOPT_SSLCERT || \ 322 (option) == CURLOPT_SSLCERTTYPE || \ 323 (option) == CURLOPT_SSLENGINE || \ 324 (option) == CURLOPT_SSLKEY || \ 325 (option) == CURLOPT_SSLKEYTYPE || \ 326 (option) == CURLOPT_SSL_CIPHER_LIST || \ 327 (option) == CURLOPT_TLS13_CIPHERS || \ 328 (option) == CURLOPT_TLSAUTH_PASSWORD || \ 329 (option) == CURLOPT_TLSAUTH_TYPE || \ 330 (option) == CURLOPT_TLSAUTH_USERNAME || \ 331 (option) == CURLOPT_UNIX_SOCKET_PATH || \ 332 (option) == CURLOPT_URL || \ 333 (option) == CURLOPT_USERAGENT || \ 334 (option) == CURLOPT_USERNAME || \ 335 (option) == CURLOPT_USERPWD || \ 336 (option) == CURLOPT_XOAUTH2_BEARER || \ 337 0) 338 339 /* evaluates to true if option takes a curl_write_callback argument */ 340 #define curlcheck_write_cb_option(option) \ 341 ((option) == CURLOPT_HEADERFUNCTION || \ 342 (option) == CURLOPT_WRITEFUNCTION) 343 344 /* evaluates to true if option takes a curl_conv_callback argument */ 345 #define curlcheck_conv_cb_option(option) \ 346 ((option) == CURLOPT_CONV_TO_NETWORK_FUNCTION || \ 347 (option) == CURLOPT_CONV_FROM_NETWORK_FUNCTION || \ 348 (option) == CURLOPT_CONV_FROM_UTF8_FUNCTION) 349 350 /* evaluates to true if option takes a data argument to pass to a callback */ 351 #define curlcheck_cb_data_option(option) \ 352 ((option) == CURLOPT_CHUNK_DATA || \ 353 (option) == CURLOPT_CLOSESOCKETDATA || \ 354 (option) == CURLOPT_DEBUGDATA || \ 355 (option) == CURLOPT_FNMATCH_DATA || \ 356 (option) == CURLOPT_HEADERDATA || \ 357 (option) == CURLOPT_INTERLEAVEDATA || \ 358 (option) == CURLOPT_IOCTLDATA || \ 359 (option) == CURLOPT_OPENSOCKETDATA || \ 360 (option) == CURLOPT_PRIVATE || \ 361 (option) == CURLOPT_PROGRESSDATA || \ 362 (option) == CURLOPT_READDATA || \ 363 (option) == CURLOPT_SEEKDATA || \ 364 (option) == CURLOPT_SOCKOPTDATA || \ 365 (option) == CURLOPT_SSH_KEYDATA || \ 366 (option) == CURLOPT_SSL_CTX_DATA || \ 367 (option) == CURLOPT_WRITEDATA || \ 368 (option) == CURLOPT_RESOLVER_START_DATA || \ 369 (option) == CURLOPT_TRAILERDATA || \ 370 0) 371 372 /* evaluates to true if option takes a POST data argument (void* or char*) */ 373 #define curlcheck_postfields_option(option) \ 374 ((option) == CURLOPT_POSTFIELDS || \ 375 (option) == CURLOPT_COPYPOSTFIELDS || \ 376 0) 377 378 /* evaluates to true if option takes a struct curl_slist * argument */ 379 #define curlcheck_slist_option(option) \ 380 ((option) == CURLOPT_HTTP200ALIASES || \ 381 (option) == CURLOPT_HTTPHEADER || \ 382 (option) == CURLOPT_MAIL_RCPT || \ 383 (option) == CURLOPT_POSTQUOTE || \ 384 (option) == CURLOPT_PREQUOTE || \ 385 (option) == CURLOPT_PROXYHEADER || \ 386 (option) == CURLOPT_QUOTE || \ 387 (option) == CURLOPT_RESOLVE || \ 388 (option) == CURLOPT_TELNETOPTIONS || \ 389 (option) == CURLOPT_CONNECT_TO || \ 390 0) 391 392 /* groups of curl_easy_getinfo infos that take the same type of argument */ 393 394 /* evaluates to true if info expects a pointer to char * argument */ 395 #define curlcheck_string_info(info) \ 396 (CURLINFO_STRING < (info) && (info) < CURLINFO_LONG && \ 397 (info) != CURLINFO_PRIVATE) 398 399 /* evaluates to true if info expects a pointer to long argument */ 400 #define curlcheck_long_info(info) \ 401 (CURLINFO_LONG < (info) && (info) < CURLINFO_DOUBLE) 402 403 /* evaluates to true if info expects a pointer to double argument */ 404 #define curlcheck_double_info(info) \ 405 (CURLINFO_DOUBLE < (info) && (info) < CURLINFO_SLIST) 406 407 /* true if info expects a pointer to struct curl_slist * argument */ 408 #define curlcheck_slist_info(info) \ 409 (((info) == CURLINFO_SSL_ENGINES) || ((info) == CURLINFO_COOKIELIST)) 410 411 /* true if info expects a pointer to struct curl_tlssessioninfo * argument */ 412 #define curlcheck_tlssessioninfo_info(info) \ 413 (((info) == CURLINFO_TLS_SSL_PTR) || ((info) == CURLINFO_TLS_SESSION)) 414 415 /* true if info expects a pointer to struct curl_certinfo * argument */ 416 #define curlcheck_certinfo_info(info) ((info) == CURLINFO_CERTINFO) 417 418 /* true if info expects a pointer to struct curl_socket_t argument */ 419 #define curlcheck_socket_info(info) \ 420 (CURLINFO_SOCKET < (info) && (info) < CURLINFO_OFF_T) 421 422 /* true if info expects a pointer to curl_off_t argument */ 423 #define curlcheck_off_t_info(info) \ 424 (CURLINFO_OFF_T < (info)) 425 426 427 /* typecheck helpers -- check whether given expression has requested type*/ 428 429 /* For pointers, you can use the curlcheck_ptr/curlcheck_arr macros, 430 * otherwise define a new macro. Search for __builtin_types_compatible_p 431 * in the GCC manual. 432 * NOTE: these macros MUST NOT EVALUATE their arguments! The argument is 433 * the actual expression passed to the curl_easy_setopt macro. This 434 * means that you can only apply the sizeof and __typeof__ operators, no 435 * == or whatsoever. 436 */ 437 438 /* XXX: should evaluate to true if expr is a pointer */ 439 #define curlcheck_any_ptr(expr) \ 440 (sizeof(expr) == sizeof(void *)) 441 442 /* evaluates to true if expr is NULL */ 443 /* XXX: must not evaluate expr, so this check is not accurate */ 444 #define curlcheck_NULL(expr) \ 445 (__builtin_types_compatible_p(__typeof__(expr), __typeof__(NULL))) 446 447 /* evaluates to true if expr is type*, const type* or NULL */ 448 #define curlcheck_ptr(expr, type) \ 449 (curlcheck_NULL(expr) || \ 450 __builtin_types_compatible_p(__typeof__(expr), type *) || \ 451 __builtin_types_compatible_p(__typeof__(expr), const type *)) 452 453 /* evaluates to true if expr is one of type[], type*, NULL or const type* */ 454 #define curlcheck_arr(expr, type) \ 455 (curlcheck_ptr((expr), type) || \ 456 __builtin_types_compatible_p(__typeof__(expr), type [])) 457 458 /* evaluates to true if expr is a string */ 459 #define curlcheck_string(expr) \ 460 (curlcheck_arr((expr), char) || \ 461 curlcheck_arr((expr), signed char) || \ 462 curlcheck_arr((expr), unsigned char)) 463 464 /* evaluates to true if expr is a long (no matter the signedness) 465 * XXX: for now, int is also accepted (and therefore short and char, which 466 * are promoted to int when passed to a variadic function) */ 467 #define curlcheck_long(expr) \ 468 (__builtin_types_compatible_p(__typeof__(expr), long) || \ 469 __builtin_types_compatible_p(__typeof__(expr), signed long) || \ 470 __builtin_types_compatible_p(__typeof__(expr), unsigned long) || \ 471 __builtin_types_compatible_p(__typeof__(expr), int) || \ 472 __builtin_types_compatible_p(__typeof__(expr), signed int) || \ 473 __builtin_types_compatible_p(__typeof__(expr), unsigned int) || \ 474 __builtin_types_compatible_p(__typeof__(expr), short) || \ 475 __builtin_types_compatible_p(__typeof__(expr), signed short) || \ 476 __builtin_types_compatible_p(__typeof__(expr), unsigned short) || \ 477 __builtin_types_compatible_p(__typeof__(expr), char) || \ 478 __builtin_types_compatible_p(__typeof__(expr), signed char) || \ 479 __builtin_types_compatible_p(__typeof__(expr), unsigned char)) 480 481 /* evaluates to true if expr is of type curl_off_t */ 482 #define curlcheck_off_t(expr) \ 483 (__builtin_types_compatible_p(__typeof__(expr), curl_off_t)) 484 485 /* evaluates to true if expr is abuffer suitable for CURLOPT_ERRORBUFFER */ 486 /* XXX: also check size of an char[] array? */ 487 #define curlcheck_error_buffer(expr) \ 488 (curlcheck_NULL(expr) || \ 489 __builtin_types_compatible_p(__typeof__(expr), char *) || \ 490 __builtin_types_compatible_p(__typeof__(expr), char[])) 491 492 /* evaluates to true if expr is of type (const) void* or (const) FILE* */ 493 #if 0 494 #define curlcheck_cb_data(expr) \ 495 (curlcheck_ptr((expr), void) || \ 496 curlcheck_ptr((expr), FILE)) 497 #else /* be less strict */ 498 #define curlcheck_cb_data(expr) \ 499 curlcheck_any_ptr(expr) 500 #endif 501 502 /* evaluates to true if expr is of type FILE* */ 503 #define curlcheck_FILE(expr) \ 504 (curlcheck_NULL(expr) || \ 505 (__builtin_types_compatible_p(__typeof__(expr), FILE *))) 506 507 /* evaluates to true if expr can be passed as POST data (void* or char*) */ 508 #define curlcheck_postfields(expr) \ 509 (curlcheck_ptr((expr), void) || \ 510 curlcheck_arr((expr), char) || \ 511 curlcheck_arr((expr), unsigned char)) 512 513 /* helper: __builtin_types_compatible_p distinguishes between functions and 514 * function pointers, hide it */ 515 #define curlcheck_cb_compatible(func, type) \ 516 (__builtin_types_compatible_p(__typeof__(func), type) || \ 517 __builtin_types_compatible_p(__typeof__(func) *, type)) 518 519 /* evaluates to true if expr is of type curl_resolver_start_callback */ 520 #define curlcheck_resolver_start_callback(expr) \ 521 (curlcheck_NULL(expr) || \ 522 curlcheck_cb_compatible((expr), curl_resolver_start_callback)) 523 524 /* evaluates to true if expr is of type curl_read_callback or "similar" */ 525 #define curlcheck_read_cb(expr) \ 526 (curlcheck_NULL(expr) || \ 527 curlcheck_cb_compatible((expr), __typeof__(fread) *) || \ 528 curlcheck_cb_compatible((expr), curl_read_callback) || \ 529 curlcheck_cb_compatible((expr), _curl_read_callback1) || \ 530 curlcheck_cb_compatible((expr), _curl_read_callback2) || \ 531 curlcheck_cb_compatible((expr), _curl_read_callback3) || \ 532 curlcheck_cb_compatible((expr), _curl_read_callback4) || \ 533 curlcheck_cb_compatible((expr), _curl_read_callback5) || \ 534 curlcheck_cb_compatible((expr), _curl_read_callback6)) 535 typedef size_t (*_curl_read_callback1)(char *, size_t, size_t, void *); 536 typedef size_t (*_curl_read_callback2)(char *, size_t, size_t, const void *); 537 typedef size_t (*_curl_read_callback3)(char *, size_t, size_t, FILE *); 538 typedef size_t (*_curl_read_callback4)(void *, size_t, size_t, void *); 539 typedef size_t (*_curl_read_callback5)(void *, size_t, size_t, const void *); 540 typedef size_t (*_curl_read_callback6)(void *, size_t, size_t, FILE *); 541 542 /* evaluates to true if expr is of type curl_write_callback or "similar" */ 543 #define curlcheck_write_cb(expr) \ 544 (curlcheck_read_cb(expr) || \ 545 curlcheck_cb_compatible((expr), __typeof__(fwrite) *) || \ 546 curlcheck_cb_compatible((expr), curl_write_callback) || \ 547 curlcheck_cb_compatible((expr), _curl_write_callback1) || \ 548 curlcheck_cb_compatible((expr), _curl_write_callback2) || \ 549 curlcheck_cb_compatible((expr), _curl_write_callback3) || \ 550 curlcheck_cb_compatible((expr), _curl_write_callback4) || \ 551 curlcheck_cb_compatible((expr), _curl_write_callback5) || \ 552 curlcheck_cb_compatible((expr), _curl_write_callback6)) 553 typedef size_t (*_curl_write_callback1)(const char *, size_t, size_t, void *); 554 typedef size_t (*_curl_write_callback2)(const char *, size_t, size_t, 555 const void *); 556 typedef size_t (*_curl_write_callback3)(const char *, size_t, size_t, FILE *); 557 typedef size_t (*_curl_write_callback4)(const void *, size_t, size_t, void *); 558 typedef size_t (*_curl_write_callback5)(const void *, size_t, size_t, 559 const void *); 560 typedef size_t (*_curl_write_callback6)(const void *, size_t, size_t, FILE *); 561 562 /* evaluates to true if expr is of type curl_ioctl_callback or "similar" */ 563 #define curlcheck_ioctl_cb(expr) \ 564 (curlcheck_NULL(expr) || \ 565 curlcheck_cb_compatible((expr), curl_ioctl_callback) || \ 566 curlcheck_cb_compatible((expr), _curl_ioctl_callback1) || \ 567 curlcheck_cb_compatible((expr), _curl_ioctl_callback2) || \ 568 curlcheck_cb_compatible((expr), _curl_ioctl_callback3) || \ 569 curlcheck_cb_compatible((expr), _curl_ioctl_callback4)) 570 typedef curlioerr (*_curl_ioctl_callback1)(CURL *, int, void *); 571 typedef curlioerr (*_curl_ioctl_callback2)(CURL *, int, const void *); 572 typedef curlioerr (*_curl_ioctl_callback3)(CURL *, curliocmd, void *); 573 typedef curlioerr (*_curl_ioctl_callback4)(CURL *, curliocmd, const void *); 574 575 /* evaluates to true if expr is of type curl_sockopt_callback or "similar" */ 576 #define curlcheck_sockopt_cb(expr) \ 577 (curlcheck_NULL(expr) || \ 578 curlcheck_cb_compatible((expr), curl_sockopt_callback) || \ 579 curlcheck_cb_compatible((expr), _curl_sockopt_callback1) || \ 580 curlcheck_cb_compatible((expr), _curl_sockopt_callback2)) 581 typedef int (*_curl_sockopt_callback1)(void *, curl_socket_t, curlsocktype); 582 typedef int (*_curl_sockopt_callback2)(const void *, curl_socket_t, 583 curlsocktype); 584 585 /* evaluates to true if expr is of type curl_opensocket_callback or 586 "similar" */ 587 #define curlcheck_opensocket_cb(expr) \ 588 (curlcheck_NULL(expr) || \ 589 curlcheck_cb_compatible((expr), curl_opensocket_callback) || \ 590 curlcheck_cb_compatible((expr), _curl_opensocket_callback1) || \ 591 curlcheck_cb_compatible((expr), _curl_opensocket_callback2) || \ 592 curlcheck_cb_compatible((expr), _curl_opensocket_callback3) || \ 593 curlcheck_cb_compatible((expr), _curl_opensocket_callback4)) 594 typedef curl_socket_t (*_curl_opensocket_callback1) 595 (void *, curlsocktype, struct curl_sockaddr *); 596 typedef curl_socket_t (*_curl_opensocket_callback2) 597 (void *, curlsocktype, const struct curl_sockaddr *); 598 typedef curl_socket_t (*_curl_opensocket_callback3) 599 (const void *, curlsocktype, struct curl_sockaddr *); 600 typedef curl_socket_t (*_curl_opensocket_callback4) 601 (const void *, curlsocktype, const struct curl_sockaddr *); 602 603 /* evaluates to true if expr is of type curl_progress_callback or "similar" */ 604 #define curlcheck_progress_cb(expr) \ 605 (curlcheck_NULL(expr) || \ 606 curlcheck_cb_compatible((expr), curl_progress_callback) || \ 607 curlcheck_cb_compatible((expr), _curl_progress_callback1) || \ 608 curlcheck_cb_compatible((expr), _curl_progress_callback2)) 609 typedef int (*_curl_progress_callback1)(void *, 610 double, double, double, double); 611 typedef int (*_curl_progress_callback2)(const void *, 612 double, double, double, double); 613 614 /* evaluates to true if expr is of type curl_debug_callback or "similar" */ 615 #define curlcheck_debug_cb(expr) \ 616 (curlcheck_NULL(expr) || \ 617 curlcheck_cb_compatible((expr), curl_debug_callback) || \ 618 curlcheck_cb_compatible((expr), _curl_debug_callback1) || \ 619 curlcheck_cb_compatible((expr), _curl_debug_callback2) || \ 620 curlcheck_cb_compatible((expr), _curl_debug_callback3) || \ 621 curlcheck_cb_compatible((expr), _curl_debug_callback4) || \ 622 curlcheck_cb_compatible((expr), _curl_debug_callback5) || \ 623 curlcheck_cb_compatible((expr), _curl_debug_callback6) || \ 624 curlcheck_cb_compatible((expr), _curl_debug_callback7) || \ 625 curlcheck_cb_compatible((expr), _curl_debug_callback8)) 626 typedef int (*_curl_debug_callback1) (CURL *, 627 curl_infotype, char *, size_t, void *); 628 typedef int (*_curl_debug_callback2) (CURL *, 629 curl_infotype, char *, size_t, const void *); 630 typedef int (*_curl_debug_callback3) (CURL *, 631 curl_infotype, const char *, size_t, void *); 632 typedef int (*_curl_debug_callback4) (CURL *, 633 curl_infotype, const char *, size_t, const void *); 634 typedef int (*_curl_debug_callback5) (CURL *, 635 curl_infotype, unsigned char *, size_t, void *); 636 typedef int (*_curl_debug_callback6) (CURL *, 637 curl_infotype, unsigned char *, size_t, const void *); 638 typedef int (*_curl_debug_callback7) (CURL *, 639 curl_infotype, const unsigned char *, size_t, void *); 640 typedef int (*_curl_debug_callback8) (CURL *, 641 curl_infotype, const unsigned char *, size_t, const void *); 642 643 /* evaluates to true if expr is of type curl_ssl_ctx_callback or "similar" */ 644 /* this is getting even messier... */ 645 #define curlcheck_ssl_ctx_cb(expr) \ 646 (curlcheck_NULL(expr) || \ 647 curlcheck_cb_compatible((expr), curl_ssl_ctx_callback) || \ 648 curlcheck_cb_compatible((expr), _curl_ssl_ctx_callback1) || \ 649 curlcheck_cb_compatible((expr), _curl_ssl_ctx_callback2) || \ 650 curlcheck_cb_compatible((expr), _curl_ssl_ctx_callback3) || \ 651 curlcheck_cb_compatible((expr), _curl_ssl_ctx_callback4) || \ 652 curlcheck_cb_compatible((expr), _curl_ssl_ctx_callback5) || \ 653 curlcheck_cb_compatible((expr), _curl_ssl_ctx_callback6) || \ 654 curlcheck_cb_compatible((expr), _curl_ssl_ctx_callback7) || \ 655 curlcheck_cb_compatible((expr), _curl_ssl_ctx_callback8)) 656 typedef CURLcode (*_curl_ssl_ctx_callback1)(CURL *, void *, void *); 657 typedef CURLcode (*_curl_ssl_ctx_callback2)(CURL *, void *, const void *); 658 typedef CURLcode (*_curl_ssl_ctx_callback3)(CURL *, const void *, void *); 659 typedef CURLcode (*_curl_ssl_ctx_callback4)(CURL *, const void *, 660 const void *); 661 #ifdef HEADER_SSL_H 662 /* hack: if we included OpenSSL's ssl.h, we know about SSL_CTX 663 * this will of course break if we're included before OpenSSL headers... 664 */ 665 typedef CURLcode (*_curl_ssl_ctx_callback5)(CURL *, SSL_CTX, void *); 666 typedef CURLcode (*_curl_ssl_ctx_callback6)(CURL *, SSL_CTX, const void *); 667 typedef CURLcode (*_curl_ssl_ctx_callback7)(CURL *, const SSL_CTX, void *); 668 typedef CURLcode (*_curl_ssl_ctx_callback8)(CURL *, const SSL_CTX, 669 const void *); 670 #else 671 typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback5; 672 typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback6; 673 typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback7; 674 typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback8; 675 #endif 676 677 /* evaluates to true if expr is of type curl_conv_callback or "similar" */ 678 #define curlcheck_conv_cb(expr) \ 679 (curlcheck_NULL(expr) || \ 680 curlcheck_cb_compatible((expr), curl_conv_callback) || \ 681 curlcheck_cb_compatible((expr), _curl_conv_callback1) || \ 682 curlcheck_cb_compatible((expr), _curl_conv_callback2) || \ 683 curlcheck_cb_compatible((expr), _curl_conv_callback3) || \ 684 curlcheck_cb_compatible((expr), _curl_conv_callback4)) 685 typedef CURLcode (*_curl_conv_callback1)(char *, size_t length); 686 typedef CURLcode (*_curl_conv_callback2)(const char *, size_t length); 687 typedef CURLcode (*_curl_conv_callback3)(void *, size_t length); 688 typedef CURLcode (*_curl_conv_callback4)(const void *, size_t length); 689 690 /* evaluates to true if expr is of type curl_seek_callback or "similar" */ 691 #define curlcheck_seek_cb(expr) \ 692 (curlcheck_NULL(expr) || \ 693 curlcheck_cb_compatible((expr), curl_seek_callback) || \ 694 curlcheck_cb_compatible((expr), _curl_seek_callback1) || \ 695 curlcheck_cb_compatible((expr), _curl_seek_callback2)) 696 typedef CURLcode (*_curl_seek_callback1)(void *, curl_off_t, int); 697 typedef CURLcode (*_curl_seek_callback2)(const void *, curl_off_t, int); 698 699 700 #endif /* CURLINC_TYPECHECK_GCC_H */ 701