cups/versioning.h

   1 /*
   2  * API versioning definitions for CUPS.
   3  *
   4  * Copyright © 2007-2018 by Apple Inc.
   5  *
   6  * Licensed under Apache License v2.0.  See the file "LICENSE" for more
   7  * information.
   8  */
   9
  10 #ifndef _CUPS_VERSIONING_H_
  11 #  define _CUPS_VERSIONING_H_
  12
  13 /*
  14  * This header defines several macros that add compiler-specific attributes for
  15  * functions:
  16  *
  17  *   - _CUPS_API_major_minor[_patch]: Specifies when an API became available by
  18  *     CUPS version.
  19  *   - _CUPS_DEPRECATED: Function is deprecated with no replacement.
  20  *   - _CUPS_DEPRECATED_MSG("message"): Function is deprecated and has a
  21  *     replacement.
  22  *   - _CUPS_FORMAT(format-index, additional-args-index): Function has a
  23  *     printf-style format argument followed by zero or more additional
  24  *     arguments.  Indices start at 1.
  25  *   - _CUPS_INTERNAL_MSG("msg"): Function is
  26  *   - _CUPS_NONNULL((arg list)): Specifies the comma-separated argument indices
  27  *     are assumed non-NULL.  Indices start at 1.
  28  *   - _CUPS_NORETURN: Specifies the function does not return.
  29  *   - _CUPS_PRIVATE: Specifies the function is private to CUPS.
  30  *   - _CUPS_PUBLIC: Specifies the function is public API.
  31  */
  32
  33 /*
  34  * Determine which compiler is being used and what annotation features are
  35  * available...
  36  */
  37
  38 #  ifdef __APPLE__
  39 #    include <os/availability.h>
  40 #  endif /* __APPLE__ */
  41
  42 #  ifdef __has_extension                /* Clang */
  43 #    define _CUPS_HAS_DEPRECATED
  44 #    define _CUPS_HAS_FORMAT
  45 #    define _CUPS_HAS_NORETURN
  46 #    define _CUPS_HAS_VISIBILITY
  47 #    if __has_extension(attribute_deprecated_with_message)
  48 #      define _CUPS_HAS_DEPRECATED_WITH_MESSAGE
  49 #    endif
  50 #    if __has_extension(attribute_unavailable_with_message)
  51 #      define _CUPS_HAS_UNAVAILABLE_WITH_MESSAGE
  52 #    endif
  53 #  elif defined(__GNUC__)               /* GCC and compatible */
  54 #    if __GNUC__ >= 3                   /* GCC 3.0 or higher */
  55 #      define _CUPS_HAS_DEPRECATED
  56 #      define _CUPS_HAS_FORMAT
  57 #      define _CUPS_HAS_NORETURN
  58 #      define _CUPS_HAS_VISIBILITY
  59 #    endif /* __GNUC__ >= 3 */
  60 #    if __GNUC__ >= 5                   /* GCC 5.x */
  61 #      define _CUPS_HAS_DEPRECATED_WITH_MESSAGE
  62 #    elif __GNUC__ == 4 && __GNUC_MINOR__ >= 5
  63                                         /* GCC 4.5 or higher */
  64 #      define _CUPS_HAS_DEPRECATED_WITH_MESSAGE
  65 #    endif /* __GNUC__ >= 5 */
  66 #  endif /* __has_extension */
  67
  68
  69 /*
  70  * Define _CUPS_PRIVATE and _CUPS_PUBLIC visibilty macros for private/public
  71  * functions...
  72  */
  73
  74 #  ifdef _CUPS_HAS_VISIBILITY
  75 #    define _CUPS_PRIVATE       __attribute__ ((visibility("hidden")))
  76 #    define _CUPS_PUBLIC        __attribute__ ((visibility("default")))
  77 #  elif defined(WIN32) && defined(LIBCUPS2_EXPORTS)
  78 #    define _CUPS_PRIVATE
  79 #    define _CUPS_PUBLIC        __declspec(dllexport)
  80 #  else
  81 #    define _CUPS_PRIVATE
  82 #    define _CUPS_PUBLIC
  83 #  endif /* _CUPS_HAS_VISIBILITY */
  84
  85
  86 /*
  87  * Define _CUPS_API_major_minor[_patch] availability macros for CUPS.
  88  *
  89  * Note: Using any of the _CUPS_API macros automatically adds _CUPS_PUBLIC.
  90  */
  91
  92 #  if defined(__APPLE__) && !defined(_CUPS_SOURCE) && !TARGET_OS_IOS
  93 /*
  94  * On Apple operating systems, the _CUPS_API_* constants are defined using the
  95  * API_ macros in <os/availability.h>.
  96  *
  97  * On iOS, we don't actually have libcups available directly, but the supplied
  98  * libcups_static target in the Xcode project supports building on iOS 11.0 and
  99  * later.
 100  */
 101 #    define _CUPS_API_1_1_19 API_AVAILABLE(macos(10.3), ios(11.0)) _CUPS_PUBLIC
 102 #    define _CUPS_API_1_1_20 API_AVAILABLE(macos(10.4), ios(11.0)) _CUPS_PUBLIC
 103 #    define _CUPS_API_1_1_21 API_AVAILABLE(macos(10.4), ios(11.0)) _CUPS_PUBLIC
 104 #    define _CUPS_API_1_2 API_AVAILABLE(macos(10.5), ios(11.0)) _CUPS_PUBLIC
 105 #    define _CUPS_API_1_3 API_AVAILABLE(macos(10.5), ios(11.0)) _CUPS_PUBLIC
 106 #    define _CUPS_API_1_4 API_AVAILABLE(macos(10.6), ios(11.0)) _CUPS_PUBLIC
 107 #    define _CUPS_API_1_5 API_AVAILABLE(macos(10.7), ios(11.0)) _CUPS_PUBLIC
 108 #    define _CUPS_API_1_6 API_AVAILABLE(macos(10.8), ios(11.0)) _CUPS_PUBLIC
 109 #    define _CUPS_API_1_7 API_AVAILABLE(macos(10.9), ios(11.0)) _CUPS_PUBLIC
 110 #    define _CUPS_API_2_0 API_AVAILABLE(macos(10.10), ios(11.0)) _CUPS_PUBLIC
 111 #    define _CUPS_API_2_2 API_AVAILABLE(macos(10.12), ios(11.0)) _CUPS_PUBLIC
 112 #    define _CUPS_API_2_2_4 API_AVAILABLE(macos(10.13), ios(11.0)) _CUPS_PUBLIC
 113 #    define _CUPS_API_2_2_7 API_AVAILABLE(macos(10.14), ios(11.0)) _CUPS_PUBLIC
 114 #    define _CUPS_API_2_3 _CUPS_PUBLIC
 115 #  else
 116 #    define _CUPS_API_1_1_19 _CUPS_PUBLIC
 117 #    define _CUPS_API_1_1_20 _CUPS_PUBLIC
 118 #    define _CUPS_API_1_1_21 _CUPS_PUBLIC
 119 #    define _CUPS_API_1_2 _CUPS_PUBLIC
 120 #    define _CUPS_API_1_3 _CUPS_PUBLIC
 121 #    define _CUPS_API_1_4 _CUPS_PUBLIC
 122 #    define _CUPS_API_1_5 _CUPS_PUBLIC
 123 #    define _CUPS_API_1_6 _CUPS_PUBLIC
 124 #    define _CUPS_API_1_7 _CUPS_PUBLIC
 125 #    define _CUPS_API_2_0 _CUPS_PUBLIC
 126 #    define _CUPS_API_2_2 _CUPS_PUBLIC
 127 #    define _CUPS_API_2_2_4 _CUPS_PUBLIC
 128 #    define _CUPS_API_2_2_7 _CUPS_PUBLIC
 129 #    define _CUPS_API_2_3 _CUPS_PUBLIC
 130 #  endif /* __APPLE__ && !_CUPS_SOURCE */
 131
 132
 133 /*
 134  * Define _CUPS_DEPRECATED and _CUPS_INTERNAL macros to mark old APIs as
 135  * "deprecated" or "unavailable" with messages so you get warnings/errors are
 136  * compile-time...
 137  *
 138  * Note: Using any of the _CUPS_DEPRECATED macros automatically adds
 139  * _CUPS_PUBLIC.
 140  */
 141
 142 #  if !defined(_CUPS_HAS_DEPRECATED) || (defined(_CUPS_SOURCE) && !defined(_CUPS_NO_DEPRECATED))
 143     /*
 144      * Don't mark functions deprecated if the compiler doesn't support it
 145      * or we are building CUPS source that doesn't care.
 146      */
 147 #    define _CUPS_DEPRECATED _CUPS_PUBLIC
 148 #    define _CUPS_DEPRECATED_MSG(m) _CUPS_PUBLIC
 149 #    define _CUPS_DEPRECATED_1_2_MSG(m) _CUPS_PUBLIC
 150 #    define _CUPS_DEPRECATED_1_6_MSG(m) _CUPS_PUBLIC
 151 #    define _CUPS_DEPRECATED_1_7_MSG(m) _CUPS_PUBLIC
 152 #    define _CUPS_DEPRECATED_2_2_MSG(m) _CUPS_PUBLIC
 153 #  elif defined(__APPLE__)
 154     /*
 155      * Compiler supports the unavailable attribute, so use it when the code
 156      * wants to exclude the use of deprecated API.
 157      */
 158 #    define _CUPS_DEPRECATED __attribute__ ((unavailable)) _CUPS_PUBLIC
 159 #    define _CUPS_DEPRECATED_MSG(m) __attribute__ ((unavailable(m))) _CUPS_PUBLIC
 160 #    define _CUPS_DEPRECATED_1_2_MSG(m) API_DEPRECATED(m, macos(10.2,10.5)) API_UNAVAILABLE(ios) _CUPS_PUBLIC
 161 #    define _CUPS_DEPRECATED_1_6_MSG(m) API_DEPRECATED(m, macos(10.2,10.8)) API_UNAVAILABLE(ios) _CUPS_PUBLIC
 162 #    define _CUPS_DEPRECATED_1_7_MSG(m) API_DEPRECATED(m, macos(10.2,10.9)) API_UNAVAILABLE(ios) _CUPS_PUBLIC
 163 #    define _CUPS_DEPRECATED_2_2_MSG(m) API_DEPRECATED(m, macos(10.2,10.12)) API_UNAVAILABLE(ios) _CUPS_PUBLIC
 164 #  elif defined(_CUPS_HAS_UNAVAILABLE_WITH_MESSAGE) && defined(_CUPS_NO_DEPRECATED)
 165     /*
 166      * Compiler supports the unavailable attribute, so use it when the code
 167      * wants to exclude the use of deprecated API.
 168      */
 169 #    define _CUPS_DEPRECATED __attribute__ ((unavailable)) _CUPS_PUBLIC
 170 #    define _CUPS_DEPRECATED_MSG(m) __attribute__ ((unavailable(m))) _CUPS_PUBLIC
 171 #    define _CUPS_DEPRECATED_1_2_MSG(m) __attribute__ ((unavailable(m))) _CUPS_PUBLIC
 172 #    define _CUPS_DEPRECATED_1_6_MSG(m) __attribute__ ((unavailable(m))) _CUPS_PUBLIC
 173 #    define _CUPS_DEPRECATED_1_7_MSG(m) __attribute__ ((unavailable(m))) _CUPS_PUBLIC
 174 #    define _CUPS_DEPRECATED_2_2_MSG(m) __attribute__ ((unavailable(m))) _CUPS_PUBLIC
 175 #  else
 176     /*
 177      * Compiler supports the deprecated attribute, so use it.
 178      */
 179 #    define _CUPS_DEPRECATED __attribute__ ((deprecated)) _CUPS_PUBLIC
 180 #    ifdef _CUPS_HAS_DEPRECATED_WITH_MESSAGE
 181 #      define _CUPS_DEPRECATED_MSG(m) __attribute__ ((deprecated(m))) _CUPS_PUBLIC
 182 #      define _CUPS_DEPRECATED_1_2_MSG(m) __attribute__ ((deprecated(m))) _CUPS_PUBLIC
 183 #      define _CUPS_DEPRECATED_1_6_MSG(m) __attribute__ ((deprecated(m))) _CUPS_PUBLIC
 184 #      define _CUPS_DEPRECATED_1_7_MSG(m) __attribute__ ((deprecated(m))) _CUPS_PUBLIC
 185 #      define _CUPS_DEPRECATED_2_2_MSG(m) __attribute__ ((deprecated(m))) _CUPS_PUBLIC
 186 #    else
 187 #      define _CUPS_DEPRECATED_MSG(m) __attribute__ ((deprecated)) _CUPS_PUBLIC
 188 #      define _CUPS_DEPRECATED_1_2_MSG(m) __attribute__ ((deprecated)) _CUPS_PUBLIC
 189 #      define _CUPS_DEPRECATED_1_6_MSG(m) __attribute__ ((deprecated)) _CUPS_PUBLIC
 190 #      define _CUPS_DEPRECATED_1_7_MSG(m) __attribute__ ((deprecated)) _CUPS_PUBLIC
 191 #      define _CUPS_DEPRECATED_2_2_MSG(m) __attribute__ ((deprecated)) _CUPS_PUBLIC
 192 #    endif /* _CUPS_HAS_DEPRECATED_WITH_MESSAGE */
 193 #  endif /* !_CUPS_HAS_DEPRECATED || (_CUPS_SOURCE && !_CUPS_NO_DEPRECATED) */
 194
 195
 196 /*
 197  * Define _CUPS_FORMAT macro for printf-style functions...
 198  */
 199
 200 #  ifdef _CUPS_HAS_FORMAT
 201 #    define _CUPS_FORMAT(a,b) __attribute__ ((__format__(__printf__, a,b)))
 202 #  else
 203 #    define _CUPS_FORMAT(a,b)
 204 #  endif /* _CUPS_HAS_FORMAT */
 205
 206
 207 /*
 208  * Define _CUPS_INTERNAL_MSG macro for private APIs that have (historical)
 209  * public visibility.
 210  *
 211  * Note: Using the _CUPS_INTERNAL_MSG macro automatically adds _CUPS_PUBLIC.
 212  */
 213
 214 #  ifdef _CUPS_SOURCE
 215 #    define _CUPS_INTERNAL_MSG(m) _CUPS_PUBLIC
 216 #  elif defined(_CUPS_HAS_UNAVAILABLE_WITH_MESSAGE)
 217 #    define _CUPS_INTERNAL_MSG(m) __attribute__ ((unavailable(m))) _CUPS_PUBLIC
 218 #  elif defined(_CUPS_HAS_DEPRECATED_WITH_MESSAGE)
 219 #    define _CUPS_INTERNAL_MSG(m) __attribute__ ((deprecated(m))) _CUPS_PUBLIC
 220 #  else
 221 #    define _CUPS_INTERNAL_MSG(m) __attribute__ ((deprecated)) _CUPS_PUBLIC
 222 #  endif /* _CUPS_SOURCE */
 223
 224
 225 /*
 226  * Define _CUPS_NONNULL macro for functions that don't expect non-null
 227  * arguments...
 228  */
 229
 230 #  ifdef _CUPS_HAS_NONNULL
 231 #    define _CUPS_NONNULL(...) __attribute__ ((nonnull(__VA_ARGS__)))
 232 #  else
 233 #    define _CUPS_NONNULL(...)
 234 #  endif /* _CUPS_HAS_FORMAT */
 235
 236
 237 /*
 238  * Define _CUPS_NORETURN macro for functions that don't return.
 239  */
 240
 241 #  ifdef _CUPS_HAS_NORETURN
 242 #    define _CUPS_NORETURN      __attribute__ ((noreturn))
 243 #  else
 244 #    define _CUPS_NORETURN
 245 #  endif /* _CUPS_HAS_NORETURN */
 246
 247
 248 #endif /* !_CUPS_VERSIONING_H_ */