mingw/include/curl/curlrules.h

   1 #ifndef __CURL_CURLRULES_H
   2 #define __CURL_CURLRULES_H
   3 /***************************************************************************
   4  *                                  _   _ ____  _
   5  *  Project                     ___| | | |  _ \| |
   6  *                             / __| | | | |_) | |
   7  *                            | (__| |_| |  _ <| |___
   8  *                             \___|\___/|_| \_\_____|
   9  *
  10  * Copyright (C) 1998 - 2011, 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 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  ***************************************************************************/
  24
  25 /* ================================================================ */
  26 /*                    COMPILE TIME SANITY CHECKS                    */
  27 /* ================================================================ */
  28
  29 /*
  30  * NOTE 1:
  31  * -------
  32  *
  33  * All checks done in this file are intentionally placed in a public
  34  * header file which is pulled by curl/curl.h when an application is
  35  * being built using an already built libcurl library. Additionally
  36  * this file is also included and used when building the library.
  37  *
  38  * If compilation fails on this file it is certainly sure that the
  39  * problem is elsewhere. It could be a problem in the curlbuild.h
  40  * header file, or simply that you are using different compilation
  41  * settings than those used to build the library.
  42  *
  43  * Nothing in this file is intended to be modified or adjusted by the
  44  * curl library user nor by the curl library builder.
  45  *
  46  * Do not deactivate any check, these are done to make sure that the
  47  * library is properly built and used.
  48  *
  49  * You can find further help on the libcurl development mailing list:
  50  * http://cool.haxx.se/mailman/listinfo/curl-library/
  51  *
  52  * NOTE 2
  53  * ------
  54  *
  55  * Some of the following compile time checks are based on the fact
  56  * that the dimension of a constant array can not be a negative one.
  57  * In this way if the compile time verification fails, the compilation
  58  * will fail issuing an error. The error description wording is compiler
  59  * dependent but it will be quite similar to one of the following:
  60  *
  61  *   "negative subscript or subscript is too large"
  62  *   "array must have at least one element"
  63  *   "-1 is an illegal array size"
  64  *   "size of array is negative"
  65  *
  66  * If you are building an application which tries to use an already
  67  * built libcurl library and you are getting this kind of errors on
  68  * this file, it is a clear indication that there is a mismatch between
  69  * how the library was built and how you are trying to use it for your
  70  * application. Your already compiled or binary library provider is the
  71  * only one who can give you the details you need to properly use it.
  72  */
  73
  74 /*
  75  * Verify that some macros are actually defined.
  76  */
  77
  78 #ifndef CURL_SIZEOF_LONG
  79 #  error "CURL_SIZEOF_LONG definition is missing!"
  80    Error Compilation_aborted_CURL_SIZEOF_LONG_is_missing
  81 #endif
  82
  83 #ifndef CURL_TYPEOF_CURL_SOCKLEN_T
  84 #  error "CURL_TYPEOF_CURL_SOCKLEN_T definition is missing!"
  85    Error Compilation_aborted_CURL_TYPEOF_CURL_SOCKLEN_T_is_missing
  86 #endif
  87
  88 #ifndef CURL_SIZEOF_CURL_SOCKLEN_T
  89 #  error "CURL_SIZEOF_CURL_SOCKLEN_T definition is missing!"
  90    Error Compilation_aborted_CURL_SIZEOF_CURL_SOCKLEN_T_is_missing
  91 #endif
  92
  93 #ifndef CURL_TYPEOF_CURL_OFF_T
  94 #  error "CURL_TYPEOF_CURL_OFF_T definition is missing!"
  95    Error Compilation_aborted_CURL_TYPEOF_CURL_OFF_T_is_missing
  96 #endif
  97
  98 #ifndef CURL_FORMAT_CURL_OFF_T
  99 #  error "CURL_FORMAT_CURL_OFF_T definition is missing!"
 100    Error Compilation_aborted_CURL_FORMAT_CURL_OFF_T_is_missing
 101 #endif
 102
 103 #ifndef CURL_FORMAT_CURL_OFF_TU
 104 #  error "CURL_FORMAT_CURL_OFF_TU definition is missing!"
 105    Error Compilation_aborted_CURL_FORMAT_CURL_OFF_TU_is_missing
 106 #endif
 107
 108 #ifndef CURL_FORMAT_OFF_T
 109 #  error "CURL_FORMAT_OFF_T definition is missing!"
 110    Error Compilation_aborted_CURL_FORMAT_OFF_T_is_missing
 111 #endif
 112
 113 #ifndef CURL_SIZEOF_CURL_OFF_T
 114 #  error "CURL_SIZEOF_CURL_OFF_T definition is missing!"
 115    Error Compilation_aborted_CURL_SIZEOF_CURL_OFF_T_is_missing
 116 #endif
 117
 118 #ifndef CURL_SUFFIX_CURL_OFF_T
 119 #  error "CURL_SUFFIX_CURL_OFF_T definition is missing!"
 120    Error Compilation_aborted_CURL_SUFFIX_CURL_OFF_T_is_missing
 121 #endif
 122
 123 #ifndef CURL_SUFFIX_CURL_OFF_TU
 124 #  error "CURL_SUFFIX_CURL_OFF_TU definition is missing!"
 125    Error Compilation_aborted_CURL_SUFFIX_CURL_OFF_TU_is_missing
 126 #endif
 127
 128 /*
 129  * Macros private to this header file.
 130  */
 131
 132 #define CurlchkszEQ(t, s) sizeof(t) == s ? 1 : -1
 133
 134 #define CurlchkszGE(t1, t2) sizeof(t1) >= sizeof(t2) ? 1 : -1
 135
 136 /*
 137  * Verify that the size previously defined and expected for long
 138  * is the same as the one reported by sizeof() at compile time.
 139  */
 140
 141 typedef char
 142   __curl_rule_01__
 143     [CurlchkszEQ(long, CURL_SIZEOF_LONG)];
 144
 145 /*
 146  * Verify that the size previously defined and expected for
 147  * curl_off_t is actually the the same as the one reported
 148  * by sizeof() at compile time.
 149  */
 150
 151 typedef char
 152   __curl_rule_02__
 153     [CurlchkszEQ(curl_off_t, CURL_SIZEOF_CURL_OFF_T)];
 154
 155 /*
 156  * Verify at compile time that the size of curl_off_t as reported
 157  * by sizeof() is greater or equal than the one reported for long
 158  * for the current compilation.
 159  */
 160
 161 typedef char
 162   __curl_rule_03__
 163     [CurlchkszGE(curl_off_t, long)];
 164
 165 /*
 166  * Verify that the size previously defined and expected for
 167  * curl_socklen_t is actually the the same as the one reported
 168  * by sizeof() at compile time.
 169  */
 170
 171 typedef char
 172   __curl_rule_04__
 173     [CurlchkszEQ(curl_socklen_t, CURL_SIZEOF_CURL_SOCKLEN_T)];
 174
 175 /*
 176  * Verify at compile time that the size of curl_socklen_t as reported
 177  * by sizeof() is greater or equal than the one reported for int for
 178  * the current compilation.
 179  */
 180
 181 typedef char
 182   __curl_rule_05__
 183     [CurlchkszGE(curl_socklen_t, int)];
 184
 185 /* ================================================================ */
 186 /*          EXTERNALLY AND INTERNALLY VISIBLE DEFINITIONS           */
 187 /* ================================================================ */
 188
 189 /*
 190  * CURL_ISOCPP and CURL_OFF_T_C definitions are done here in order to allow
 191  * these to be visible and exported by the external libcurl interface API,
 192  * while also making them visible to the library internals, simply including
 193  * setup.h, without actually needing to include curl.h internally.
 194  * If some day this section would grow big enough, all this should be moved
 195  * to its own header file.
 196  */
 197
 198 /*
 199  * Figure out if we can use the ## preprocessor operator, which is supported
 200  * by ISO/ANSI C and C++. Some compilers support it without setting __STDC__
 201  * or  __cplusplus so we need to carefully check for them too.
 202  */
 203
 204 #if defined(__STDC__) || defined(_MSC_VER) || defined(__cplusplus) || \
 205   defined(__HP_aCC) || defined(__BORLANDC__) || defined(__LCC__) || \
 206   defined(__POCC__) || defined(__SALFORDC__) || defined(__HIGHC__) || \
 207   defined(__ILEC400__)
 208   /* This compiler is believed to have an ISO compatible preprocessor */
 209 #define CURL_ISOCPP
 210 #else
 211   /* This compiler is believed NOT to have an ISO compatible preprocessor */
 212 #undef CURL_ISOCPP
 213 #endif
 214
 215 /*
 216  * Macros for minimum-width signed and unsigned curl_off_t integer constants.
 217  */
 218
 219 #if defined(__BORLANDC__) && (__BORLANDC__ == 0x0551)
 220 #  define __CURL_OFF_T_C_HLPR2(x) x
 221 #  define __CURL_OFF_T_C_HLPR1(x) __CURL_OFF_T_C_HLPR2(x)
 222 #  define CURL_OFF_T_C(Val)  __CURL_OFF_T_C_HLPR1(Val) ## \
 223                              __CURL_OFF_T_C_HLPR1(CURL_SUFFIX_CURL_OFF_T)
 224 #  define CURL_OFF_TU_C(Val) __CURL_OFF_T_C_HLPR1(Val) ## \
 225                              __CURL_OFF_T_C_HLPR1(CURL_SUFFIX_CURL_OFF_TU)
 226 #else
 227 #  ifdef CURL_ISOCPP
 228 #    define __CURL_OFF_T_C_HLPR2(Val,Suffix) Val ## Suffix
 229 #  else
 230 #    define __CURL_OFF_T_C_HLPR2(Val,Suffix) Val/**/Suffix
 231 #  endif
 232 #  define __CURL_OFF_T_C_HLPR1(Val,Suffix) __CURL_OFF_T_C_HLPR2(Val,Suffix)
 233 #  define CURL_OFF_T_C(Val)  __CURL_OFF_T_C_HLPR1(Val,CURL_SUFFIX_CURL_OFF_T)
 234 #  define CURL_OFF_TU_C(Val) __CURL_OFF_T_C_HLPR1(Val,CURL_SUFFIX_CURL_OFF_TU)
 235 #endif
 236
 237 /*
 238  * Get rid of macros private to this header file.
 239  */
 240
 241 #undef CurlchkszEQ
 242 #undef CurlchkszGE
 243
 244 /*
 245  * Get rid of macros not intended to exist beyond this point.
 246  */
 247
 248 #undef CURL_PULL_WS2TCPIP_H
 249 #undef CURL_PULL_SYS_TYPES_H
 250 #undef CURL_PULL_SYS_SOCKET_H
 251 #undef CURL_PULL_STDINT_H
 252 #undef CURL_PULL_INTTYPES_H
 253
 254 #undef CURL_TYPEOF_CURL_SOCKLEN_T
 255 #undef CURL_TYPEOF_CURL_OFF_T
 256
 257 #ifdef CURL_NO_OLDIES
 258 #undef CURL_FORMAT_OFF_T /* not required since 7.19.0 - obsoleted in 7.20.0 */
 259 #endif
 260
 261 #endif /* __CURL_CURLRULES_H */