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Diffstat (limited to '')
| -rw-r--r-- | mozglue/misc/IntegerPrintfMacros.h | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/mozglue/misc/IntegerPrintfMacros.h b/mozglue/misc/IntegerPrintfMacros.h new file mode 100644 index 0000000000..acf33eb85c --- /dev/null +++ b/mozglue/misc/IntegerPrintfMacros.h @@ -0,0 +1,84 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* Implements the C99 <inttypes.h> interface. */ + +#ifndef mozilla_IntegerPrintfMacros_h_ +#define mozilla_IntegerPrintfMacros_h_ + +/* + * These macros should not be used with the NSPR printf-like functions or their + * users. If you need to use NSPR's facilities, see the comment on + * supported formats at the top of nsprpub/pr/include/prprf.h. + */ + +/* + * scanf is a footgun: if the input number exceeds the bounds of the target + * type, behavior is undefined (in the compiler sense: that is, this code + * could overwrite your hard drive with zeroes): + * + * uint8_t u; + * sscanf("256", "%" SCNu8, &u); // BAD + * + * For this reason, *never* use the SCN* macros provided by this header! + */ + +#include <inttypes.h> + +/* + * Fix up Android's broken [u]intptr_t inttype macros. Android's PRI*PTR + * macros are defined as "ld", but sizeof(long) is 8 and sizeof(intptr_t) + * is 4 on 32-bit Android. TestTypeTraits.cpp asserts that these new macro + * definitions match the actual type sizes seen at compile time. + */ +#if defined(ANDROID) && !defined(__LP64__) +# undef PRIdPTR /* intptr_t */ +# define PRIdPTR "d" /* intptr_t */ +# undef PRIiPTR /* intptr_t */ +# define PRIiPTR "i" /* intptr_t */ +# undef PRIoPTR /* uintptr_t */ +# define PRIoPTR "o" /* uintptr_t */ +# undef PRIuPTR /* uintptr_t */ +# define PRIuPTR "u" /* uintptr_t */ +# undef PRIxPTR /* uintptr_t */ +# define PRIxPTR "x" /* uintptr_t */ +# undef PRIXPTR /* uintptr_t */ +# define PRIXPTR "X" /* uintptr_t */ +#endif + +/* + * Fix up Android's broken macros for [u]int_fastN_t. On ARM64, Android's + * PRI*FAST16/32 macros are defined as "d", but the types themselves are defined + * as long and unsigned long. + */ +#if defined(ANDROID) && defined(__LP64__) +# undef PRIdFAST16 /* int_fast16_t */ +# define PRIdFAST16 PRId64 /* int_fast16_t */ +# undef PRIiFAST16 /* int_fast16_t */ +# define PRIiFAST16 PRIi64 /* int_fast16_t */ +# undef PRIoFAST16 /* uint_fast16_t */ +# define PRIoFAST16 PRIo64 /* uint_fast16_t */ +# undef PRIuFAST16 /* uint_fast16_t */ +# define PRIuFAST16 PRIu64 /* uint_fast16_t */ +# undef PRIxFAST16 /* uint_fast16_t */ +# define PRIxFAST16 PRIx64 /* uint_fast16_t */ +# undef PRIXFAST16 /* uint_fast16_t */ +# define PRIXFAST16 PRIX64 /* uint_fast16_t */ +# undef PRIdFAST32 /* int_fast32_t */ +# define PRIdFAST32 PRId64 /* int_fast32_t */ +# undef PRIiFAST32 /* int_fast32_t */ +# define PRIiFAST32 PRIi64 /* int_fast32_t */ +# undef PRIoFAST32 /* uint_fast32_t */ +# define PRIoFAST32 PRIo64 /* uint_fast32_t */ +# undef PRIuFAST32 /* uint_fast32_t */ +# define PRIuFAST32 PRIu64 /* uint_fast32_t */ +# undef PRIxFAST32 /* uint_fast32_t */ +# define PRIxFAST32 PRIx64 /* uint_fast32_t */ +# undef PRIXFAST32 /* uint_fast32_t */ +# define PRIXFAST32 PRIX64 /* uint_fast32_t */ +#endif + +#endif /* mozilla_IntegerPrintfMacros_h_ */ |