FdPrintf.h (1804B)
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 #ifndef __FdPrintf_h__ 8 #define __FdPrintf_h__ 9 10 #include <cstdarg> 11 12 #ifdef _WIN32 13 typedef void* platform_handle_t; 14 #else 15 typedef int platform_handle_t; 16 #endif 17 18 /* 19 * We can't use libc's (f)printf because it would reenter in replace_malloc, 20 * So use a custom and simplified version. Only %p, %zu, %s and %% are 21 * supported, %zu, %s, support width specifiers. 22 */ 23 int VSNPrintf(char* aBuf, size_t aSize, const char* aFormat, va_list aArgs) 24 #ifdef __GNUC__ 25 __attribute__((format(printf, 3, 0))) 26 #endif 27 ; 28 29 int SNPrintf(char* aBuf, size_t aSize, const char* aFormat, ...) 30 #ifdef __GNUC__ 31 __attribute__((format(printf, 3, 4))) 32 #endif 33 ; 34 35 /* 36 * /!\ These functions use a fixed-size internal buffer. The caller is 37 * expected to not use a format string that may overflow. 38 * The aFd argument is a file descriptor on UNIX and a native win32 file 39 * handle on Windows (from CreateFile). We can't use the windows POSIX 40 * APIs is that they don't support O_APPEND in a multi-process-safe way, 41 * while CreateFile does. 42 */ 43 void VFdPrintf(platform_handle_t aFd, const char* aFormat, va_list aArgs) 44 #ifdef __GNUC__ 45 __attribute__((format(printf, 2, 0))) 46 #endif 47 ; 48 49 void FdPrintf(platform_handle_t aFd, const char* aFormat, ...) 50 #ifdef __GNUC__ 51 __attribute__((format(printf, 2, 3))) 52 #endif 53 ; 54 55 // Write buffer contents without formatting (eg for use with SNPrintf). 56 void FdPuts(platform_handle_t aFd, const char* aBuf, size_t aLen); 57 58 #endif /* __FdPrintf_h__ */