mfbt/IntegerPrintfMacros.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 /* Implements the C99 <inttypes.h> interface. */
   8
   9 #ifndef mozilla_IntegerPrintfMacros_h_
  10 #define mozilla_IntegerPrintfMacros_h_
  11
  12 /*
  13  * These macros should not be used with the NSPR printf-like functions or their
  14  * users.  If you need to use NSPR's facilities, see the comment on
  15  * supported formats at the top of nsprpub/pr/include/prprf.h.
  16  */
  17
  18 /*
  19  * scanf is a footgun: if the input number exceeds the bounds of the target
  20  * type, behavior is undefined (in the compiler sense: that is, this code
  21  * could overwrite your hard drive with zeroes):
  22  *
  23  *   uint8_t u;
  24  *   sscanf("256", "%" SCNu8, &u); // BAD
  25  *
  26  * For this reason, *never* use the SCN* macros provided by this header!
  27  */
  28
  29 #include <inttypes.h>
  30
  31 /*
  32  * Fix up Android's broken [u]intptr_t inttype macros. Android's PRI*PTR
  33  * macros are defined as "ld", but sizeof(long) is 8 and sizeof(intptr_t)
  34  * is 4 on 32-bit Android. TestTypeTraits.cpp asserts that these new macro
  35  * definitions match the actual type sizes seen at compile time.
  36  */
  37 #if defined(ANDROID) && !defined(__LP64__)
  38 #  undef PRIdPTR      /* intptr_t  */
  39 #  define PRIdPTR "d" /* intptr_t  */
  40 #  undef PRIiPTR      /* intptr_t  */
  41 #  define PRIiPTR "i" /* intptr_t  */
  42 #  undef PRIoPTR      /* uintptr_t */
  43 #  define PRIoPTR "o" /* uintptr_t */
  44 #  undef PRIuPTR      /* uintptr_t */
  45 #  define PRIuPTR "u" /* uintptr_t */
  46 #  undef PRIxPTR      /* uintptr_t */
  47 #  define PRIxPTR "x" /* uintptr_t */
  48 #  undef PRIXPTR      /* uintptr_t */
  49 #  define PRIXPTR "X" /* uintptr_t */
  50 #endif
  51
  52 /*
  53  * Fix up Android's broken macros for [u]int_fastN_t. On ARM64, Android's
  54  * PRI*FAST16/32 macros are defined as "d", but the types themselves are defined
  55  * as long and unsigned long.
  56  */
  57 #if defined(ANDROID) && defined(__LP64__)
  58 #  undef PRIdFAST16         /* int_fast16_t */
  59 #  define PRIdFAST16 PRId64 /* int_fast16_t */
  60 #  undef PRIiFAST16         /* int_fast16_t */
  61 #  define PRIiFAST16 PRIi64 /* int_fast16_t */
  62 #  undef PRIoFAST16         /* uint_fast16_t */
  63 #  define PRIoFAST16 PRIo64 /* uint_fast16_t */
  64 #  undef PRIuFAST16         /* uint_fast16_t */
  65 #  define PRIuFAST16 PRIu64 /* uint_fast16_t */
  66 #  undef PRIxFAST16         /* uint_fast16_t */
  67 #  define PRIxFAST16 PRIx64 /* uint_fast16_t */
  68 #  undef PRIXFAST16         /* uint_fast16_t */
  69 #  define PRIXFAST16 PRIX64 /* uint_fast16_t */
  70 #  undef PRIdFAST32         /* int_fast32_t */
  71 #  define PRIdFAST32 PRId64 /* int_fast32_t */
  72 #  undef PRIiFAST32         /* int_fast32_t */
  73 #  define PRIiFAST32 PRIi64 /* int_fast32_t */
  74 #  undef PRIoFAST32         /* uint_fast32_t */
  75 #  define PRIoFAST32 PRIo64 /* uint_fast32_t */
  76 #  undef PRIuFAST32         /* uint_fast32_t */
  77 #  define PRIuFAST32 PRIu64 /* uint_fast32_t */
  78 #  undef PRIxFAST32         /* uint_fast32_t */
  79 #  define PRIxFAST32 PRIx64 /* uint_fast32_t */
  80 #  undef PRIXFAST32         /* uint_fast32_t */
  81 #  define PRIXFAST32 PRIX64 /* uint_fast32_t */
  82 #endif
  83
  84 #endif /* mozilla_IntegerPrintfMacros_h_ */