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typecheck-gcc.h
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#ifndef __CURL_TYPECHECK_GCC_H #define __CURL_TYPECHECK_GCC_H /*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al. * * This software is licensed as described in the file COPYING, which * you should have received as part of this distribution. The terms * are also available at https://curl.haxx.se/docs/copyright.html. * * You may opt to use, copy, modify, merge, publish, distribute and/or sell * copies of the Software, and permit persons to whom the Software is * furnished to do so, under the terms of the COPYING file. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ***************************************************************************/ /* wraps curl_easy_setopt() with typechecking */ /* To add a new kind of warning, add an * if(_curl_is_sometype_option(_curl_opt)) * if(!_curl_is_sometype(value)) * _curl_easy_setopt_err_sometype(); * block and define _curl_is_sometype_option, _curl_is_sometype and * _curl_easy_setopt_err_sometype below * * NOTE: We use two nested 'if' statements here instead of the && operator, in * order to work around gcc bug #32061. It affects only gcc 4.3.x/4.4.x * when compiling with -Wlogical-op. * * To add an option that uses the same type as an existing option, you'll just * need to extend the appropriate _curl_*_option macro */ #define curl_easy_setopt(handle, option, value) \ __extension__ ({ \ __typeof__(option) _curl_opt = option; \ if(__builtin_constant_p(_curl_opt)) { \ if(_curl_is_long_option(_curl_opt)) \ if(!_curl_is_long(value)) \ _curl_easy_setopt_err_long(); \ if(_curl_is_off_t_option(_curl_opt)) \ if(!_curl_is_off_t(value)) \ _curl_easy_setopt_err_curl_off_t(); \ if(_curl_is_string_option(_curl_opt)) \ if(!_curl_is_string(value)) \ _curl_easy_setopt_err_string(); \ if(_curl_is_write_cb_option(_curl_opt)) \ if(!_curl_is_write_cb(value)) \ _curl_easy_setopt_err_write_callback(); \ if((_curl_opt) == CURLOPT_RESOLVER_START_FUNCTION) \ if(!_curl_is_resolver_start_callback(value)) \ _curl_easy_setopt_err_resolver_start_callback(); \ if((_curl_opt) == CURLOPT_READFUNCTION) \ if(!_curl_is_read_cb(value)) \ _curl_easy_setopt_err_read_cb(); \ if((_curl_opt) == CURLOPT_IOCTLFUNCTION) \ if(!_curl_is_ioctl_cb(value)) \ _curl_easy_setopt_err_ioctl_cb(); \ if((_curl_opt) == CURLOPT_SOCKOPTFUNCTION) \ if(!_curl_is_sockopt_cb(value)) \ _curl_easy_setopt_err_sockopt_cb(); \ if((_curl_opt) == CURLOPT_OPENSOCKETFUNCTION) \ if(!_curl_is_opensocket_cb(value)) \ _curl_easy_setopt_err_opensocket_cb(); \ if((_curl_opt) == CURLOPT_PROGRESSFUNCTION) \ if(!_curl_is_progress_cb(value)) \ _curl_easy_setopt_err_progress_cb(); \ if((_curl_opt) == CURLOPT_DEBUGFUNCTION) \ if(!_curl_is_debug_cb(value)) \ _curl_easy_setopt_err_debug_cb(); \ if((_curl_opt) == CURLOPT_SSL_CTX_FUNCTION) \ if(!_curl_is_ssl_ctx_cb(value)) \ _curl_easy_setopt_err_ssl_ctx_cb(); \ if(_curl_is_conv_cb_option(_curl_opt)) \ if(!_curl_is_conv_cb(value)) \ _curl_easy_setopt_err_conv_cb(); \ if((_curl_opt) == CURLOPT_SEEKFUNCTION) \ if(!_curl_is_seek_cb(value)) \ _curl_easy_setopt_err_seek_cb(); \ if(_curl_is_cb_data_option(_curl_opt)) \ if(!_curl_is_cb_data(value)) \ _curl_easy_setopt_err_cb_data(); \ if((_curl_opt) == CURLOPT_ERRORBUFFER) \ if(!_curl_is_error_buffer(value)) \ _curl_easy_setopt_err_error_buffer(); \ if((_curl_opt) == CURLOPT_STDERR) \ if(!_curl_is_FILE(value)) \ _curl_easy_setopt_err_FILE(); \ if(_curl_is_postfields_option(_curl_opt)) \ if(!_curl_is_postfields(value)) \ _curl_easy_setopt_err_postfields(); \ if((_curl_opt) == CURLOPT_HTTPPOST) \ if(!_curl_is_arr((value), struct curl_httppost)) \ _curl_easy_setopt_err_curl_httpost(); \ if((_curl_opt) == CURLOPT_MIMEPOST) \ if(!_curl_is_ptr((value), curl_mime)) \ _curl_easy_setopt_err_curl_mimepost(); \ if(_curl_is_slist_option(_curl_opt)) \ if(!_curl_is_arr((value), struct curl_slist)) \ _curl_easy_setopt_err_curl_slist(); \ if((_curl_opt) == CURLOPT_SHARE) \ if(!_curl_is_ptr((value), CURLSH)) \ _curl_easy_setopt_err_CURLSH(); \ } \ curl_easy_setopt(handle, _curl_opt, value); \ }) /* wraps curl_easy_getinfo() with typechecking */ /* FIXME: don't allow const pointers */ #define curl_easy_getinfo(handle, info, arg) \ __extension__ ({ \ __typeof__(info) _curl_info = info; \ if(__builtin_constant_p(_curl_info)) { \ if(_curl_is_string_info(_curl_info)) \ if(!_curl_is_arr((arg), char *)) \ _curl_easy_getinfo_err_string(); \ if(_curl_is_long_info(_curl_info)) \ if(!_curl_is_arr((arg), long)) \ _curl_easy_getinfo_err_long(); \ if(_curl_is_double_info(_curl_info)) \ if(!_curl_is_arr((arg), double)) \ _curl_easy_getinfo_err_double(); \ if(_curl_is_slist_info(_curl_info)) \ if(!_curl_is_arr((arg), struct curl_slist *)) \ _curl_easy_getinfo_err_curl_slist(); \ if(_curl_is_tlssessioninfo_info(_curl_info)) \ if(!_curl_is_arr((arg), struct curl_tlssessioninfo *)) \ _curl_easy_getinfo_err_curl_tlssesssioninfo(); \ if(_curl_is_certinfo_info(_curl_info)) \ if(!_curl_is_arr((arg), struct curl_certinfo *)) \ _curl_easy_getinfo_err_curl_certinfo(); \ if(_curl_is_socket_info(_curl_info)) \ if(!_curl_is_arr((arg), curl_socket_t)) \ _curl_easy_getinfo_err_curl_socket(); \ if(_curl_is_off_t_info(_curl_info)) \ if(!_curl_is_arr((arg), curl_off_t)) \ _curl_easy_getinfo_err_curl_off_t(); \ } \ curl_easy_getinfo(handle, _curl_info, arg); \ }) /* TODO: typechecking for curl_share_setopt() and curl_multi_setopt(), * for now just make sure that the functions are called with three * arguments */ #define curl_share_setopt(share,opt,param) curl_share_setopt(share,opt,param) #define curl_multi_setopt(handle,opt,param) curl_multi_setopt(handle,opt,param) /* the actual warnings, triggered by calling the _curl_easy_setopt_err* * functions */ /* To define a new warning, use _CURL_WARNING(identifier, "message") */ #define _CURL_WARNING(id, message) \ static void __attribute__((__warning__(message))) \ __attribute__((__unused__)) __attribute__((__noinline__)) \ id(void) { __asm__(""); } _CURL_WARNING(_curl_easy_setopt_err_long, "curl_easy_setopt expects a long argument for this option") _CURL_WARNING(_curl_easy_setopt_err_curl_off_t, "curl_easy_setopt expects a curl_off_t argument for this option") _CURL_WARNING(_curl_easy_setopt_err_string, "curl_easy_setopt expects a " "string ('char *' or char[]) argument for this option" ) _CURL_WARNING(_curl_easy_setopt_err_write_callback, "curl_easy_setopt expects a curl_write_callback argument for this option") _CURL_WARNING(_curl_easy_setopt_err_resolver_start_callback, "curl_easy_setopt expects a " "curl_resolver_start_callback argument for this option" ) _CURL_WARNING(_curl_easy_setopt_err_read_cb, "curl_easy_setopt expects a curl_read_callback argument for this option") _CURL_WARNING(_curl_easy_setopt_err_ioctl_cb, "curl_easy_setopt expects a curl_ioctl_callback argument for this option") _CURL_WARNING(_curl_easy_setopt_err_sockopt_cb, "curl_easy_setopt expects a curl_sockopt_callback argument for this option") _CURL_WARNING(_curl_easy_setopt_err_opensocket_cb, "curl_easy_setopt expects a " "curl_opensocket_callback argument for this option" ) _CURL_WARNING(_curl_easy_setopt_err_progress_cb, "curl_easy_setopt expects a curl_progress_callback argument for this option") _CURL_WARNING(_curl_easy_setopt_err_debug_cb, "curl_easy_setopt expects a curl_debug_callback argument for this option") _CURL_WARNING(_curl_easy_setopt_err_ssl_ctx_cb, "curl_easy_setopt expects a curl_ssl_ctx_callback argument for this option") _CURL_WARNING(_curl_easy_setopt_err_conv_cb, "curl_easy_setopt expects a curl_conv_callback argument for this option") _CURL_WARNING(_curl_easy_setopt_err_seek_cb, "curl_easy_setopt expects a curl_seek_callback argument for this option") _CURL_WARNING(_curl_easy_setopt_err_cb_data, "curl_easy_setopt expects a " "private data pointer as argument for this option") _CURL_WARNING(_curl_easy_setopt_err_error_buffer, "curl_easy_setopt expects a " "char buffer of CURL_ERROR_SIZE as argument for this option") _CURL_WARNING(_curl_easy_setopt_err_FILE, "curl_easy_setopt expects a 'FILE *' argument for this option") _CURL_WARNING(_curl_easy_setopt_err_postfields, "curl_easy_setopt expects a 'void *' or 'char *' argument for this option") _CURL_WARNING(_curl_easy_setopt_err_curl_httpost, "curl_easy_setopt expects a 'struct curl_httppost *' " "argument for this option") _CURL_WARNING(_curl_easy_setopt_err_curl_mimepost, "curl_easy_setopt expects a 'curl_mime *' " "argument for this option") _CURL_WARNING(_curl_easy_setopt_err_curl_slist, "curl_easy_setopt expects a 'struct curl_slist *' argument for this option") _CURL_WARNING(_curl_easy_setopt_err_CURLSH, "curl_easy_setopt expects a CURLSH* argument for this option") _CURL_WARNING(_curl_easy_getinfo_err_string, "curl_easy_getinfo expects a pointer to 'char *' for this info") _CURL_WARNING(_curl_easy_getinfo_err_long, "curl_easy_getinfo expects a pointer to long for this info") _CURL_WARNING(_curl_easy_getinfo_err_double, "curl_easy_getinfo expects a pointer to double for this info") _CURL_WARNING(_curl_easy_getinfo_err_curl_slist, "curl_easy_getinfo expects a pointer to 'struct curl_slist *' for this info") _CURL_WARNING(_curl_easy_getinfo_err_curl_tlssesssioninfo, "curl_easy_getinfo expects a pointer to " "'struct curl_tlssessioninfo *' for this info") _CURL_WARNING(_curl_easy_getinfo_err_curl_certinfo, "curl_easy_getinfo expects a pointer to " "'struct curl_certinfo *' for this info") _CURL_WARNING(_curl_easy_getinfo_err_curl_socket, "curl_easy_getinfo expects a pointer to curl_socket_t for this info") _CURL_WARNING(_curl_easy_getinfo_err_curl_off_t, "curl_easy_getinfo expects a pointer to curl_off_t for this info") /* groups of curl_easy_setops options that take the same type of argument */ /* To add a new option to one of the groups, just add * (option) == CURLOPT_SOMETHING * to the or-expression. If the option takes a long or curl_off_t, you don't * have to do anything */ /* evaluates to true if option takes a long argument */ #define _curl_is_long_option(option) \ (0 < (option) && (option) < CURLOPTTYPE_OBJECTPOINT) #define _curl_is_off_t_option(option) \ ((option) > CURLOPTTYPE_OFF_T) /* evaluates to true if option takes a char* argument */ #define _curl_is_string_option(option) \ ((option) == CURLOPT_ABSTRACT_UNIX_SOCKET || \ (option) == CURLOPT_ACCEPT_ENCODING || \ (option) == CURLOPT_CAINFO || \ (option) == CURLOPT_CAPATH || \ (option) == CURLOPT_COOKIE || \ (option) == CURLOPT_COOKIEFILE || \ (option) == CURLOPT_COOKIEJAR || \ (option) == CURLOPT_COOKIELIST || \ (option) == CURLOPT_CRLFILE || \ (option) == CURLOPT_CUSTOMREQUEST || \ (option) == CURLOPT_DEFAULT_PROTOCOL || \ (option) == CURLOPT_DNS_INTERFACE || \ (option) == CURLOPT_DNS_LOCAL_IP4 || \ (option) == CURLOPT_DNS_LOCAL_IP6 || \ (option) == CURLOPT_DNS_SERVERS || \ (option) == CURLOPT_EGDSOCKET || \ (option) == CURLOPT_FTPPORT || \ (option) == CURLOPT_FTP_ACCOUNT || \ (option) == CURLOPT_FTP_ALTERNATIVE_TO_USER || \ (option) == CURLOPT_INTERFACE || \ (option) == CURLOPT_ISSUERCERT || \ (option) == CURLOPT_KEYPASSWD || \ (option) == CURLOPT_KRBLEVEL || \ (option) == CURLOPT_LOGIN_OPTIONS || \ (option) == CURLOPT_MAIL_AUTH || \ (option) == CURLOPT_MAIL_FROM || \ (option) == CURLOPT_NETRC_FILE || \ (option) == CURLOPT_NOPROXY || \ (option) == CURLOPT_PASSWORD || \ (option) == CURLOPT_PINNEDPUBLICKEY || \ (option) == CURLOPT_PRE_PROXY || \ (option) == CURLOPT_PROXY || \ (option) == CURLOPT_PROXYPASSWORD || \ (option) == CURLOPT_PROXYUSERNAME || \ (option) == CURLOPT_PROXYUSERPWD || \ (option) == CURLOPT_PROXY_CAINFO || \ (option) == CURLOPT_PROXY_CAPATH || \ (option) == CURLOPT_PROXY_CRLFILE || \ (option) == CURLOPT_PROXY_KEYPASSWD || \ (option) == CURLOPT_PROXY_PINNEDPUBLICKEY || \ (option) == CURLOPT_PROXY_SERVICE_NAME || \ (option) == CURLOPT_PROXY_SSLCERT || \ (option) == CURLOPT_PROXY_SSLCERTTYPE || \ (option) == CURLOPT_PROXY_SSLKEY || \ (option) == CURLOPT_PROXY_SSLKEYTYPE || \ (option) == CURLOPT_PROXY_SSL_CIPHER_LIST || \ (option) == CURLOPT_PROXY_TLSAUTH_PASSWORD || \ (option) == CURLOPT_PROXY_TLSAUTH_USERNAME || \ (option) == CURLOPT_PROXY_TLSAUTH_TYPE || \ (option) == CURLOPT_RANDOM_FILE || \ (option) == CURLOPT_RANGE || \ (option) == CURLOPT_REFERER || \ (option) == CURLOPT_RTSP_SESSION_ID || \ (option) == CURLOPT_RTSP_STREAM_URI || \ (option) == CURLOPT_RTSP_TRANSPORT || \ (option) == CURLOPT_SERVICE_NAME || \ (option) == CURLOPT_SOCKS5_GSSAPI_SERVICE || \ (option) == CURLOPT_SSH_HOST_PUBLIC_KEY_MD5 || \ (option) == CURLOPT_SSH_KNOWNHOSTS || \ (option) == CURLOPT_SSH_PRIVATE_KEYFILE || \ (option) == CURLOPT_SSH_PUBLIC_KEYFILE || \ (option) == CURLOPT_SSLCERT || \ (option) == CURLOPT_SSLCERTTYPE || \ (option) == CURLOPT_SSLENGINE || \ (option) == CURLOPT_SSLKEY || \ (option) == CURLOPT_SSLKEYTYPE || \ (option) == CURLOPT_SSL_CIPHER_LIST || \ (option) == CURLOPT_TLSAUTH_PASSWORD || \ (option) == CURLOPT_TLSAUTH_TYPE || \ (option) == CURLOPT_TLSAUTH_USERNAME || \ (option) == CURLOPT_UNIX_SOCKET_PATH || \ (option) == CURLOPT_URL || \ (option) == CURLOPT_USERAGENT || \ (option) == CURLOPT_USERNAME || \ (option) == CURLOPT_USERPWD || \ (option) == CURLOPT_XOAUTH2_BEARER || \ 0) /* evaluates to true if option takes a curl_write_callback argument */ #define _curl_is_write_cb_option(option) \ ((option) == CURLOPT_HEADERFUNCTION || \ (option) == CURLOPT_WRITEFUNCTION) /* evaluates to true if option takes a curl_conv_callback argument */ #define _curl_is_conv_cb_option(option) \ ((option) == CURLOPT_CONV_TO_NETWORK_FUNCTION || \ (option) == CURLOPT_CONV_FROM_NETWORK_FUNCTION || \ (option) == CURLOPT_CONV_FROM_UTF8_FUNCTION) /* evaluates to true if option takes a data argument to pass to a callback */ #define _curl_is_cb_data_option(option) \ ((option) == CURLOPT_CHUNK_DATA || \ (option) == CURLOPT_CLOSESOCKETDATA || \ (option) == CURLOPT_DEBUGDATA || \ (option) == CURLOPT_FNMATCH_DATA || \ (option) == CURLOPT_HEADERDATA || \ (option) == CURLOPT_INTERLEAVEDATA || \ (option) == CURLOPT_IOCTLDATA || \ (option) == CURLOPT_OPENSOCKETDATA || \ (option) == CURLOPT_PRIVATE || \ (option) == CURLOPT_PROGRESSDATA || \ (option) == CURLOPT_READDATA || \ (option) == CURLOPT_SEEKDATA || \ (option) == CURLOPT_SOCKOPTDATA || \ (option) == CURLOPT_SSH_KEYDATA || \ (option) == CURLOPT_SSL_CTX_DATA || \ (option) == CURLOPT_WRITEDATA || \ (option) == CURLOPT_RESOLVER_START_DATA || \ 0) /* evaluates to true if option takes a POST data argument (void* or char*) */ #define _curl_is_postfields_option(option) \ ((option) == CURLOPT_POSTFIELDS || \ (option) == CURLOPT_COPYPOSTFIELDS || \ 0) /* evaluates to true if option takes a struct curl_slist * argument */ #define _curl_is_slist_option(option) \ ((option) == CURLOPT_HTTP200ALIASES || \ (option) == CURLOPT_HTTPHEADER || \ (option) == CURLOPT_MAIL_RCPT || \ (option) == CURLOPT_POSTQUOTE || \ (option) == CURLOPT_PREQUOTE || \ (option) == CURLOPT_PROXYHEADER || \ (option) == CURLOPT_QUOTE || \ (option) == CURLOPT_RESOLVE || \ (option) == CURLOPT_TELNETOPTIONS || \ 0) /* groups of curl_easy_getinfo infos that take the same type of argument */ /* evaluates to true if info expects a pointer to char * argument */ #define _curl_is_string_info(info) \ (CURLINFO_STRING < (info) && (info) < CURLINFO_LONG) /* evaluates to true if info expects a pointer to long argument */ #define _curl_is_long_info(info) \ (CURLINFO_LONG < (info) && (info) < CURLINFO_DOUBLE) /* evaluates to true if info expects a pointer to double argument */ #define _curl_is_double_info(info) \ (CURLINFO_DOUBLE < (info) && (info) < CURLINFO_SLIST) /* true if info expects a pointer to struct curl_slist * argument */ #define _curl_is_slist_info(info) \ (((info) == CURLINFO_SSL_ENGINES) || ((info) == CURLINFO_COOKIELIST)) /* true if info expects a pointer to struct curl_tlssessioninfo * argument */ #define _curl_is_tlssessioninfo_info(info) \ (((info) == CURLINFO_TLS_SSL_PTR) || ((info) == CURLINFO_TLS_SESSION)) /* true if info expects a pointer to struct curl_certinfo * argument */ #define _curl_is_certinfo_info(info) ((info) == CURLINFO_CERTINFO) /* true if info expects a pointer to struct curl_socket_t argument */ #define _curl_is_socket_info(info) \ (CURLINFO_SOCKET < (info) && (info) < CURLINFO_OFF_T) /* true if info expects a pointer to curl_off_t argument */ #define _curl_is_off_t_info(info) \ (CURLINFO_OFF_T < (info)) /* typecheck helpers -- check whether given expression has requested type*/ /* For pointers, you can use the _curl_is_ptr/_curl_is_arr macros, * otherwise define a new macro. Search for __builtin_types_compatible_p * in the GCC manual. * NOTE: these macros MUST NOT EVALUATE their arguments! The argument is * the actual expression passed to the curl_easy_setopt macro. This * means that you can only apply the sizeof and __typeof__ operators, no * == or whatsoever. */ /* XXX: should evaluate to true if expr is a pointer */ #define _curl_is_any_ptr(expr) \ (sizeof(expr) == sizeof(void *)) /* evaluates to true if expr is NULL */ /* XXX: must not evaluate expr, so this check is not accurate */ #define _curl_is_NULL(expr) \ (__builtin_types_compatible_p(__typeof__(expr), __typeof__(NULL))) /* evaluates to true if expr is type*, const type* or NULL */ #define _curl_is_ptr(expr, type) \ (_curl_is_NULL(expr) || \ __builtin_types_compatible_p(__typeof__(expr), type *) || \ __builtin_types_compatible_p(__typeof__(expr), const type *)) /* evaluates to true if expr is one of type[], type*, NULL or const type* */ #define _curl_is_arr(expr, type) \ (_curl_is_ptr((expr), type) || \ __builtin_types_compatible_p(__typeof__(expr), type [])) /* evaluates to true if expr is a string */ #define _curl_is_string(expr) \ (_curl_is_arr((expr), char) || \ _curl_is_arr((expr), signed char) || \ _curl_is_arr((expr), unsigned char)) /* evaluates to true if expr is a long (no matter the signedness) * XXX: for now, int is also accepted (and therefore short and char, which * are promoted to int when passed to a variadic function) */ #define _curl_is_long(expr) \ (__builtin_types_compatible_p(__typeof__(expr), long) || \ __builtin_types_compatible_p(__typeof__(expr), signed long) || \ __builtin_types_compatible_p(__typeof__(expr), unsigned long) || \ __builtin_types_compatible_p(__typeof__(expr), int) || \ __builtin_types_compatible_p(__typeof__(expr), signed int) || \ __builtin_types_compatible_p(__typeof__(expr), unsigned int) || \ __builtin_types_compatible_p(__typeof__(expr), short) || \ __builtin_types_compatible_p(__typeof__(expr), signed short) || \ __builtin_types_compatible_p(__typeof__(expr), unsigned short) || \ __builtin_types_compatible_p(__typeof__(expr), char) || \ __builtin_types_compatible_p(__typeof__(expr), signed char) || \ __builtin_types_compatible_p(__typeof__(expr), unsigned char)) /* evaluates to true if expr is of type curl_off_t */ #define _curl_is_off_t(expr) \ (__builtin_types_compatible_p(__typeof__(expr), curl_off_t)) /* evaluates to true if expr is abuffer suitable for CURLOPT_ERRORBUFFER */ /* XXX: also check size of an char[] array? */ #define _curl_is_error_buffer(expr) \ (_curl_is_NULL(expr) || \ __builtin_types_compatible_p(__typeof__(expr), char *) || \ __builtin_types_compatible_p(__typeof__(expr), char[])) /* evaluates to true if expr is of type (const) void* or (const) FILE* */ #if 0 #define _curl_is_cb_data(expr) \ (_curl_is_ptr((expr), void) || \ _curl_is_ptr((expr), FILE)) #else /* be less strict */ #define _curl_is_cb_data(expr) \ _curl_is_any_ptr(expr) #endif /* evaluates to true if expr is of type FILE* */ #define _curl_is_FILE(expr) \ (_curl_is_NULL(expr) || \ (__builtin_types_compatible_p(__typeof__(expr), FILE *))) /* evaluates to true if expr can be passed as POST data (void* or char*) */ #define _curl_is_postfields(expr) \ (_curl_is_ptr((expr), void) || \ _curl_is_arr((expr), char)) /* FIXME: the whole callback checking is messy... * The idea is to tolerate char vs. void and const vs. not const * pointers in arguments at least */ /* helper: __builtin_types_compatible_p distinguishes between functions and * function pointers, hide it */ #define _curl_callback_compatible(func, type) \ (__builtin_types_compatible_p(__typeof__(func), type) || \ __builtin_types_compatible_p(__typeof__(func) *, type)) /* evaluates to true if expr is of type curl_resolver_start_callback */ #define _curl_is_resolver_start_callback(expr) \ (_curl_is_NULL(expr) || \ _curl_callback_compatible((expr), curl_resolver_start_callback)) /* evaluates to true if expr is of type curl_read_callback or "similar" */ #define _curl_is_read_cb(expr) \ (_curl_is_NULL(expr) || \ _curl_callback_compatible((expr), __typeof__(fread) *) || \ _curl_callback_compatible((expr), curl_read_callback) || \ _curl_callback_compatible((expr), _curl_read_callback1) || \ _curl_callback_compatible((expr), _curl_read_callback2) || \ _curl_callback_compatible((expr), _curl_read_callback3) || \ _curl_callback_compatible((expr), _curl_read_callback4) || \ _curl_callback_compatible((expr), _curl_read_callback5) || \ _curl_callback_compatible((expr), _curl_read_callback6)) typedef size_t (*_curl_read_callback1)(char *, size_t, size_t, void *); typedef size_t (*_curl_read_callback2)(char *, size_t, size_t, const void *); typedef size_t (*_curl_read_callback3)(char *, size_t, size_t, FILE *); typedef size_t (*_curl_read_callback4)(void *, size_t, size_t, void *); typedef size_t (*_curl_read_callback5)(void *, size_t, size_t, const void *); typedef size_t (*_curl_read_callback6)(void *, size_t, size_t, FILE *); /* evaluates to true if expr is of type curl_write_callback or "similar" */ #define _curl_is_write_cb(expr) \ (_curl_is_read_cb(expr) || \ _curl_callback_compatible((expr), __typeof__(fwrite) *) || \ _curl_callback_compatible((expr), curl_write_callback) || \ _curl_callback_compatible((expr), _curl_write_callback1) || \ _curl_callback_compatible((expr), _curl_write_callback2) || \ _curl_callback_compatible((expr), _curl_write_callback3) || \ _curl_callback_compatible((expr), _curl_write_callback4) || \ _curl_callback_compatible((expr), _curl_write_callback5) || \ _curl_callback_compatible((expr), _curl_write_callback6)) typedef size_t (*_curl_write_callback1)(const char *, size_t, size_t, void *); typedef size_t (*_curl_write_callback2)(const char *, size_t, size_t, const void *); typedef size_t (*_curl_write_callback3)(const char *, size_t, size_t, FILE *); typedef size_t (*_curl_write_callback4)(const void *, size_t, size_t, void *); typedef size_t (*_curl_write_callback5)(const void *, size_t, size_t, const void *); typedef size_t (*_curl_write_callback6)(const void *, size_t, size_t, FILE *); /* evaluates to true if expr is of type curl_ioctl_callback or "similar" */ #define _curl_is_ioctl_cb(expr) \ (_curl_is_NULL(expr) || \ _curl_callback_compatible((expr), curl_ioctl_callback) || \ _curl_callback_compatible((expr), _curl_ioctl_callback1) || \ _curl_callback_compatible((expr), _curl_ioctl_callback2) || \ _curl_callback_compatible((expr), _curl_ioctl_callback3) || \ _curl_callback_compatible((expr), _curl_ioctl_callback4)) typedef curlioerr (*_curl_ioctl_callback1)(CURL *, int, void *); typedef curlioerr (*_curl_ioctl_callback2)(CURL *, int, const void *); typedef curlioerr (*_curl_ioctl_callback3)(CURL *, curliocmd, void *); typedef curlioerr (*_curl_ioctl_callback4)(CURL *, curliocmd, const void *); /* evaluates to true if expr is of type curl_sockopt_callback or "similar" */ #define _curl_is_sockopt_cb(expr) \ (_curl_is_NULL(expr) || \ _curl_callback_compatible((expr), curl_sockopt_callback) || \ _curl_callback_compatible((expr), _curl_sockopt_callback1) || \ _curl_callback_compatible((expr), _curl_sockopt_callback2)) typedef int (*_curl_sockopt_callback1)(void *, curl_socket_t, curlsocktype); typedef int (*_curl_sockopt_callback2)(const void *, curl_socket_t, curlsocktype); /* evaluates to true if expr is of type curl_opensocket_callback or "similar" */ #define _curl_is_opensocket_cb(expr) \ (_curl_is_NULL(expr) || \ _curl_callback_compatible((expr), curl_opensocket_callback) || \ _curl_callback_compatible((expr), _curl_opensocket_callback1) || \ _curl_callback_compatible((expr), _curl_opensocket_callback2) || \ _curl_callback_compatible((expr), _curl_opensocket_callback3) || \ _curl_callback_compatible((expr), _curl_opensocket_callback4)) typedef curl_socket_t (*_curl_opensocket_callback1) (void *, curlsocktype, struct curl_sockaddr *); typedef curl_socket_t (*_curl_opensocket_callback2) (void *, curlsocktype, const struct curl_sockaddr *); typedef curl_socket_t (*_curl_opensocket_callback3) (const void *, curlsocktype, struct curl_sockaddr *); typedef curl_socket_t (*_curl_opensocket_callback4) (const void *, curlsocktype, const struct curl_sockaddr *); /* evaluates to true if expr is of type curl_progress_callback or "similar" */ #define _curl_is_progress_cb(expr) \ (_curl_is_NULL(expr) || \ _curl_callback_compatible((expr), curl_progress_callback) || \ _curl_callback_compatible((expr), _curl_progress_callback1) || \ _curl_callback_compatible((expr), _curl_progress_callback2)) typedef int (*_curl_progress_callback1)(void *, double, double, double, double); typedef int (*_curl_progress_callback2)(const void *, double, double, double, double); /* evaluates to true if expr is of type curl_debug_callback or "similar" */ #define _curl_is_debug_cb(expr) \ (_curl_is_NULL(expr) || \ _curl_callback_compatible((expr), curl_debug_callback) || \ _curl_callback_compatible((expr), _curl_debug_callback1) || \ _curl_callback_compatible((expr), _curl_debug_callback2) || \ _curl_callback_compatible((expr), _curl_debug_callback3) || \ _curl_callback_compatible((expr), _curl_debug_callback4) || \ _curl_callback_compatible((expr), _curl_debug_callback5) || \ _curl_callback_compatible((expr), _curl_debug_callback6) || \ _curl_callback_compatible((expr), _curl_debug_callback7) || \ _curl_callback_compatible((expr), _curl_debug_callback8)) typedef int (*_curl_debug_callback1) (CURL *, curl_infotype, char *, size_t, void *); typedef int (*_curl_debug_callback2) (CURL *, curl_infotype, char *, size_t, const void *); typedef int (*_curl_debug_callback3) (CURL *, curl_infotype, const char *, size_t, void *); typedef int (*_curl_debug_callback4) (CURL *, curl_infotype, const char *, size_t, const void *); typedef int (*_curl_debug_callback5) (CURL *, curl_infotype, unsigned char *, size_t, void *); typedef int (*_curl_debug_callback6) (CURL *, curl_infotype, unsigned char *, size_t, const void *); typedef int (*_curl_debug_callback7) (CURL *, curl_infotype, const unsigned char *, size_t, void *); typedef int (*_curl_debug_callback8) (CURL *, curl_infotype, const unsigned char *, size_t, const void *); /* evaluates to true if expr is of type curl_ssl_ctx_callback or "similar" */ /* this is getting even messier... */ #define _curl_is_ssl_ctx_cb(expr) \ (_curl_is_NULL(expr) || \ _curl_callback_compatible((expr), curl_ssl_ctx_callback) || \ _curl_callback_compatible((expr), _curl_ssl_ctx_callback1) || \ _curl_callback_compatible((expr), _curl_ssl_ctx_callback2) || \ _curl_callback_compatible((expr), _curl_ssl_ctx_callback3) || \ _curl_callback_compatible((expr), _curl_ssl_ctx_callback4) || \ _curl_callback_compatible((expr), _curl_ssl_ctx_callback5) || \ _curl_callback_compatible((expr), _curl_ssl_ctx_callback6) || \ _curl_callback_compatible((expr), _curl_ssl_ctx_callback7) || \ _curl_callback_compatible((expr), _curl_ssl_ctx_callback8)) typedef CURLcode (*_curl_ssl_ctx_callback1)(CURL *, void *, void *); typedef CURLcode (*_curl_ssl_ctx_callback2)(CURL *, void *, const void *); typedef CURLcode (*_curl_ssl_ctx_callback3)(CURL *, const void *, void *); typedef CURLcode (*_curl_ssl_ctx_callback4)(CURL *, const void *, const void *); #ifdef HEADER_SSL_H /* hack: if we included OpenSSL's ssl.h, we know about SSL_CTX * this will of course break if we're included before OpenSSL headers... */ typedef CURLcode (*_curl_ssl_ctx_callback5)(CURL *, SSL_CTX, void *); typedef CURLcode (*_curl_ssl_ctx_callback6)(CURL *, SSL_CTX, const void *); typedef CURLcode (*_curl_ssl_ctx_callback7)(CURL *, const SSL_CTX, void *); typedef CURLcode (*_curl_ssl_ctx_callback8)(CURL *, const SSL_CTX, const void *); #else typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback5; typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback6; typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback7; typedef _curl_ssl_ctx_callback1 _curl_ssl_ctx_callback8; #endif /* evaluates to true if expr is of type curl_conv_callback or "similar" */ #define _curl_is_conv_cb(expr) \ (_curl_is_NULL(expr) || \ _curl_callback_compatible((expr), curl_conv_callback) || \ _curl_callback_compatible((expr), _curl_conv_callback1) || \ _curl_callback_compatible((expr), _curl_conv_callback2) || \ _curl_callback_compatible((expr), _curl_conv_callback3) || \ _curl_callback_compatible((expr), _curl_conv_callback4)) typedef CURLcode (*_curl_conv_callback1)(char *, size_t length); typedef CURLcode (*_curl_conv_callback2)(const char *, size_t length); typedef CURLcode (*_curl_conv_callback3)(void *, size_t length); typedef CURLcode (*_curl_conv_callback4)(const void *, size_t length); /* evaluates to true if expr is of type curl_seek_callback or "similar" */ #define _curl_is_seek_cb(expr) \ (_curl_is_NULL(expr) || \ _curl_callback_compatible((expr), curl_seek_callback) || \ _curl_callback_compatible((expr), _curl_seek_callback1) || \ _curl_callback_compatible((expr), _curl_seek_callback2)) typedef CURLcode (*_curl_seek_callback1)(void *, curl_off_t, int); typedef CURLcode (*_curl_seek_callback2)(const void *, curl_off_t, int); #endif /* __CURL_TYPECHECK_GCC_H */
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