ReactOS 0.4.15-dev-8219-ge8b88cf
rand_s.c
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1/*
2 * PROJECT: ReactOS CRT library
3 * LICENSE: GPL-2.0+ (https://spdx.org/licenses/GPL-2.0+)
4 * PURPOSE: rand_s implementation
5 * COPYRIGHT: Copyright 2010 Sylvain Petreolle <spetreolle@yahoo.fr>
6 * Copyright 2015 Christoph von Wittich <christoph_vw@reactos.org>
7 * Copyright 2015 Pierre Schweitzer <pierre@reactos.org>
8 */
9
10#include <precomp.h>
11
12typedef BOOLEAN (WINAPI *PFN_SystemFunction036)(PVOID, ULONG); // RtlGenRandom
14
15/*********************************************************************
16 * rand_s (MSVCRT.@)
17 */
18int CDECL rand_s(unsigned int *pval)
19{
20 HINSTANCE hadvapi32;
21
22 if (!pval)
23 {
24 _invalid_parameter(NULL,_CRT_WIDE("rand_s"),_CRT_WIDE(__FILE__),__LINE__, 0);
25 *_errno() = EINVAL;
26 return EINVAL;
27 }
28
29 *pval = 0;
30
32 {
33 PFN_SystemFunction036 pSystemFunction036;
34
35 hadvapi32 = LoadLibraryA("advapi32.dll");
36 if (!hadvapi32)
37 {
38 _invalid_parameter(NULL,_CRT_WIDE("rand_s"),_CRT_WIDE(__FILE__),__LINE__, 0);
39 *_errno() = EINVAL;
40 return EINVAL;
41 }
42
43 pSystemFunction036 = (void*)GetProcAddress(hadvapi32, "SystemFunction036");
44 if (!pSystemFunction036)
45 {
46 _invalid_parameter(NULL,_CRT_WIDE("rand_s"),_CRT_WIDE(__FILE__),__LINE__, 0);
47 *_errno() = EINVAL;
48 FreeLibrary(hadvapi32);
49 return EINVAL;
50 }
51
52 g_pfnSystemFunction036 = pSystemFunction036;
53 }
54
55 if (!g_pfnSystemFunction036(pval, sizeof(*pval)))
56 {
57 _invalid_parameter(NULL,_CRT_WIDE("rand_s"),_CRT_WIDE(__FILE__),__LINE__, 0);
58 *_errno() = EINVAL;
59 return EINVAL;
60 }
61
62 return 0;
63}
64
65// Small hack: import stub to allow GCC's stdc++ to link
66#if defined(__GNUC__) && (DLL_EXPORT_VERSION < 0x600)
67#ifdef WIN64
68const void* __imp_rand_s = rand_s;
69#else
70const void* _imp_rand_s = rand_s;
71#endif
72#endif
#define EINVAL
Definition: acclib.h:90
#define _CRT_WIDE(_String)
Definition: crtdefs.h:55
#define NULL
Definition: types.h:112
#define CDECL
Definition: compat.h:29
#define GetProcAddress(x, y)
Definition: compat.h:753
#define FreeLibrary(x)
Definition: compat.h:748
HINSTANCE WINAPI DECLSPEC_HOTPATCH LoadLibraryA(LPCSTR lpLibFileName)
Definition: loader.c:111
#define BOOLEAN
Definition: pedump.c:73
void _invalid_parameter(const wchar_t *expression, const wchar_t *function, const wchar_t *file, unsigned int line, uintptr_t pReserved)
_CRTIMP int *__cdecl _errno(void)
Definition: errno.c:17
PFN_SystemFunction036 g_pfnSystemFunction036
Definition: rand_s.c:13
int CDECL rand_s(unsigned int *pval)
Definition: rand_s.c:18
BOOLEAN(WINAPI * PFN_SystemFunction036)(PVOID, ULONG)
Definition: rand_s.c:12
void * PVOID
Definition: typedefs.h:50
uint32_t ULONG
Definition: typedefs.h:59
#define WINAPI
Definition: msvc.h:6