1 #ifndef __CURL_CURLRULES_H 2 #define __CURL_CURLRULES_H 3 /*************************************************************************** 4 * _ _ ____ _ 5 * Project ___| | | | _ \| | 6 * / __| | | | |_) | | 7 * | (__| |_| | _ <| |___ 8 * \___|\___/|_| \_\_____| 9 * 10 * Copyright (C) 1998 - 2009, Daniel Stenberg, <daniel (at) 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 http://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 * $Id: curlrules.h,v 1.7 2009-10-27 16:56:20 yangtse Exp $ 24 ***************************************************************************/ 25 26 /* ================================================================ */ 27 /* COMPILE TIME SANITY CHECKS */ 28 /* ================================================================ */ 29 30 /* 31 * NOTE 1: 32 * ------- 33 * 34 * All checks done in this file are intentionally placed in a public 35 * header file which is pulled by curl/curl.h when an application is 36 * being built using an already built libcurl library. Additionally 37 * this file is also included and used when building the library. 38 * 39 * If compilation fails on this file it is certainly sure that the 40 * problem is elsewhere. It could be a problem in the curlbuild.h 41 * header file, or simply that you are using different compilation 42 * settings than those used to build the library. 43 * 44 * Nothing in this file is intended to be modified or adjusted by the 45 * curl library user nor by the curl library builder. 46 * 47 * Do not deactivate any check, these are done to make sure that the 48 * library is properly built and used. 49 * 50 * You can find further help on the libcurl development mailing list: 51 * http://cool.haxx.se/mailman/listinfo/curl-library/ 52 * 53 * NOTE 2 54 * ------ 55 * 56 * Some of the following compile time checks are based on the fact 57 * that the dimension of a constant array can not be a negative one. 58 * In this way if the compile time verification fails, the compilation 59 * will fail issuing an error. The error description wording is compiler 60 * dependent but it will be quite similar to one of the following: 61 * 62 * "negative subscript or subscript is too large" 63 * "array must have at least one element" 64 * "-1 is an illegal array size" 65 * "size of array is negative" 66 * 67 * If you are building an application which tries to use an already 68 * built libcurl library and you are getting this kind of errors on 69 * this file, it is a clear indication that there is a mismatch between 70 * how the library was built and how you are trying to use it for your 71 * application. Your already compiled or binary library provider is the 72 * only one who can give you the details you need to properly use it. 73 */ 74 75 /* 76 * Verify that some macros are actually defined. 77 */ 78 79 #ifndef CURL_SIZEOF_LONG 80 # error "CURL_SIZEOF_LONG definition is missing!" 81 Error Compilation_aborted_CURL_SIZEOF_LONG_is_missing 82 #endif 83 84 #ifndef CURL_TYPEOF_CURL_SOCKLEN_T 85 # error "CURL_TYPEOF_CURL_SOCKLEN_T definition is missing!" 86 Error Compilation_aborted_CURL_TYPEOF_CURL_SOCKLEN_T_is_missing 87 #endif 88 89 #ifndef CURL_SIZEOF_CURL_SOCKLEN_T 90 # error "CURL_SIZEOF_CURL_SOCKLEN_T definition is missing!" 91 Error Compilation_aborted_CURL_SIZEOF_CURL_SOCKLEN_T_is_missing 92 #endif 93 94 #ifndef CURL_TYPEOF_CURL_OFF_T 95 # error "CURL_TYPEOF_CURL_OFF_T definition is missing!" 96 Error Compilation_aborted_CURL_TYPEOF_CURL_OFF_T_is_missing 97 #endif 98 99 #ifndef CURL_FORMAT_CURL_OFF_T 100 # error "CURL_FORMAT_CURL_OFF_T definition is missing!" 101 Error Compilation_aborted_CURL_FORMAT_CURL_OFF_T_is_missing 102 #endif 103 104 #ifndef CURL_FORMAT_CURL_OFF_TU 105 # error "CURL_FORMAT_CURL_OFF_TU definition is missing!" 106 Error Compilation_aborted_CURL_FORMAT_CURL_OFF_TU_is_missing 107 #endif 108 109 #ifndef CURL_FORMAT_OFF_T 110 # error "CURL_FORMAT_OFF_T definition is missing!" 111 Error Compilation_aborted_CURL_FORMAT_OFF_T_is_missing 112 #endif 113 114 #ifndef CURL_SIZEOF_CURL_OFF_T 115 # error "CURL_SIZEOF_CURL_OFF_T definition is missing!" 116 Error Compilation_aborted_CURL_SIZEOF_CURL_OFF_T_is_missing 117 #endif 118 119 #ifndef CURL_SUFFIX_CURL_OFF_T 120 # error "CURL_SUFFIX_CURL_OFF_T definition is missing!" 121 Error Compilation_aborted_CURL_SUFFIX_CURL_OFF_T_is_missing 122 #endif 123 124 #ifndef CURL_SUFFIX_CURL_OFF_TU 125 # error "CURL_SUFFIX_CURL_OFF_TU definition is missing!" 126 Error Compilation_aborted_CURL_SUFFIX_CURL_OFF_TU_is_missing 127 #endif 128 129 /* 130 * Macros private to this header file. 131 */ 132 133 #define CurlchkszEQ(t, s) sizeof(t) == s ? 1 : -1 134 135 #define CurlchkszGE(t1, t2) sizeof(t1) >= sizeof(t2) ? 1 : -1 136 137 /* 138 * Verify that the size previously defined and expected for long 139 * is the same as the one reported by sizeof() at compile time. 140 */ 141 142 typedef char 143 __curl_rule_01__ 144 [CurlchkszEQ(long, CURL_SIZEOF_LONG)]; 145 146 /* 147 * Verify that the size previously defined and expected for 148 * curl_off_t is actually the the same as the one reported 149 * by sizeof() at compile time. 150 */ 151 152 typedef char 153 __curl_rule_02__ 154 [CurlchkszEQ(curl_off_t, CURL_SIZEOF_CURL_OFF_T)]; 155 156 /* 157 * Verify at compile time that the size of curl_off_t as reported 158 * by sizeof() is greater or equal than the one reported for long 159 * for the current compilation. 160 */ 161 162 typedef char 163 __curl_rule_03__ 164 [CurlchkszGE(curl_off_t, long)]; 165 166 /* 167 * Verify that the size previously defined and expected for 168 * curl_socklen_t is actually the the same as the one reported 169 * by sizeof() at compile time. 170 */ 171 172 typedef char 173 __curl_rule_04__ 174 [CurlchkszEQ(curl_socklen_t, CURL_SIZEOF_CURL_SOCKLEN_T)]; 175 176 /* 177 * Verify at compile time that the size of curl_socklen_t as reported 178 * by sizeof() is greater or equal than the one reported for int for 179 * the current compilation. 180 */ 181 182 typedef char 183 __curl_rule_05__ 184 [CurlchkszGE(curl_socklen_t, int)]; 185 186 /* ================================================================ */ 187 /* EXTERNALLY AND INTERNALLY VISIBLE DEFINITIONS */ 188 /* ================================================================ */ 189 190 /* 191 * CURL_ISOCPP and CURL_OFF_T_C definitions are done here in order to allow 192 * these to be visible and exported by the external libcurl interface API, 193 * while also making them visible to the library internals, simply including 194 * setup.h, without actually needing to include curl.h internally. 195 * If some day this section would grow big enough, all this should be moved 196 * to its own header file. 197 */ 198 199 /* 200 * Figure out if we can use the ## preprocessor operator, which is supported 201 * by ISO/ANSI C and C++. Some compilers support it without setting __STDC__ 202 * or __cplusplus so we need to carefully check for them too. 203 */ 204 205 #if defined(__STDC__) || defined(_MSC_VER) || defined(__cplusplus) || \ 206 defined(__HP_aCC) || defined(__BORLANDC__) || defined(__LCC__) || \ 207 defined(__POCC__) || defined(__SALFORDC__) || defined(__HIGHC__) || \ 208 defined(__ILEC400__) 209 /* This compiler is believed to have an ISO compatible preprocessor */ 210 #define CURL_ISOCPP 211 #else 212 /* This compiler is believed NOT to have an ISO compatible preprocessor */ 213 #undef CURL_ISOCPP 214 #endif 215 216 /* 217 * Macros for minimum-width signed and unsigned curl_off_t integer constants. 218 */ 219 220 #ifdef CURL_ISOCPP 221 # define __CURL_OFF_T_C_HELPER2(Val,Suffix) Val ## Suffix 222 #else 223 # define __CURL_OFF_T_C_HELPER2(Val,Suffix) Val/**/Suffix 224 #endif 225 #define __CURL_OFF_T_C_HELPER1(Val,Suffix) __CURL_OFF_T_C_HELPER2(Val,Suffix) 226 #define CURL_OFF_T_C(Val) __CURL_OFF_T_C_HELPER1(Val,CURL_SUFFIX_CURL_OFF_T) 227 #define CURL_OFF_TU_C(Val) __CURL_OFF_T_C_HELPER1(Val,CURL_SUFFIX_CURL_OFF_TU) 228 229 /* 230 * Get rid of macros private to this header file. 231 */ 232 233 #undef CurlchkszEQ 234 #undef CurlchkszGE 235 236 /* 237 * Get rid of macros not intended to exist beyond this point. 238 */ 239 240 #undef CURL_PULL_WS2TCPIP_H 241 #undef CURL_PULL_SYS_TYPES_H 242 #undef CURL_PULL_SYS_SOCKET_H 243 #undef CURL_PULL_STDINT_H 244 #undef CURL_PULL_INTTYPES_H 245 246 #undef CURL_TYPEOF_CURL_SOCKLEN_T 247 #undef CURL_TYPEOF_CURL_OFF_T 248 249 #endif /* __CURL_CURLRULES_H */ 250
