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1/*
2 This file is part of libmicrohttpd
3 Copyright (C) 2014-2016 Karlson2k (Evgeny Grin)
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18
19*/
20
21/**
22 * @file microhttpd/mhd_compat.h
23 * @brief Header for platform missing functions.
24 * @author Karlson2k (Evgeny Grin)
25 *
26 * Provides compatibility for platforms with some missing
27 * functionality.
28 * Any functions can be implemented as macro on some platforms
29 * unless explicitly marked otherwise.
30 * Any function argument can be skipped in macro, so avoid
31 * variable modification in function parameters.
32 */
33
34#ifndef MHD_COMPAT_H
35#define MHD_COMPAT_H 1
36
37#include "mhd_options.h"
38#include <stdlib.h>
39#ifdef HAVE_STRING_H /* for strerror() */
40#include <string.h>
41#endif /* HAVE_STRING_H */
42
43 /* MHD_strerror_ is strerror */
44#define MHD_strerror_(errnum) strerror((errnum))
45
46/* Platform-independent snprintf name */
47#if defined(HAVE_SNPRINTF)
48#define MHD_snprintf_ snprintf
49#else /* ! HAVE_SNPRINTF */
50#if defined(_WIN32) && ! defined(__CYGWIN__)
51/* Emulate snprintf function on W32 */
52int W32_snprintf(char *__restrict s, size_t n, const char *__restrict format, ...);
53#define MHD_snprintf_ W32_snprintf
54#else /* ! _WIN32 || __CYGWIN__ */
55#error Your platform does not support snprintf() and MHD does not know how to emulate it on your platform.
56#endif /* ! _WIN32 || __CYGWIN__ */
57#endif /* ! HAVE_SNPRINTF */
58
59#ifdef HAVE_RANDOM
60/**
61 * Generate pseudo random number at least 30-bit wide.
62 * @return pseudo random number at least 30-bit wide.
63 */
64#define MHD_random_() random()
65#else /* HAVE_RANDOM */
66#ifdef HAVE_RAND
67/**
68 * Generate pseudo random number at least 30-bit wide.
69 * @return pseudo random number at least 30-bit wide.
70 */
71#define MHD_random_() ( (((long)rand()) << 15) + (long)rand() )
72#endif /* HAVE_RAND */
73#endif /* HAVE_RANDOM */
74
75#ifdef HAVE_CALLOC
76/**
77 * MHD_calloc_ is platform-independent calloc()
78 */
79#define MHD_calloc_(n,s) calloc((n),(s))
80#else /* ! HAVE_CALLOC */
81/**
82 * MHD_calloc_ is platform-independent calloc()
83 */
84void *MHD_calloc_(size_t nelem, size_t elsize);
85#endif /* ! HAVE_CALLOC */
86
87#endif /* MHD_COMPAT_H */