diff options
| author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
|---|---|---|
| committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
| commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
| tree | 10027f336435511475e392454359edea8e25895d /mfbt/IntegerPrintfMacros.h | |
| parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
| download | uxp-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.gz | |
Add m-esr52 at 52.6.0
Diffstat (limited to 'mfbt/IntegerPrintfMacros.h')
| -rw-r--r-- | mfbt/IntegerPrintfMacros.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/mfbt/IntegerPrintfMacros.h b/mfbt/IntegerPrintfMacros.h new file mode 100644 index 0000000000..c534a0ba2c --- /dev/null +++ b/mfbt/IntegerPrintfMacros.h @@ -0,0 +1,52 @@ +/* -*- 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, e.g. mozilla/Logging.h. 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 + +#endif /* mozilla_IntegerPrintfMacros_h_ */ |