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6655819c99
Add more format specifiers to FdPrintf: %, s and add width and precision specifiers. Differential Revision: https://phabricator.services.mozilla.com/D87829
27 lines
1.1 KiB
C
27 lines
1.1 KiB
C
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef __FdPrintf_h__
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#define __FdPrintf_h__
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/* We can't use libc's (f)printf because it would reenter in replace_malloc,
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* So use a custom and simplified version. Only %p, %zu, %s and %% are
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* supported, %zu, %s, support width specifiers.
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*
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* /!\ This function used a fixed-size internal buffer. The caller is
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* expected to not use a format string that may overflow.
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* The aFd argument is a file descriptor on UNIX and a native win32 file
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* handle on Windows (from CreateFile). We can't use the windows POSIX
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* APIs is that they don't support O_APPEND in a multi-process-safe way,
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* while CreateFile does.
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*/
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extern void FdPrintf(intptr_t aFd, const char* aFormat, ...)
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#ifdef __GNUC__
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__attribute__((format(printf, 2, 3)))
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#endif
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;
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#endif /* __FdPrintf_h__ */
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