* Sync up to trunk head (r64921).
[reactos.git] / lib / sdk / crt / stdlib / errno.c
1 /*
2 * COPYRIGHT: See COPYING in the top level directory
3 * PROJECT: ReactOS system libraries
4 * FILE: lib/crt/errno.c
5 * PURPOSE: Unknown
6 * PROGRAMER: Unknown
7 *
8 */
9 #include <precomp.h>
10 #include "doserrmap.h"
11 #include <errno.h>
12 #include <internal/wine/msvcrt.h>
13
14 static _invalid_parameter_handler invalid_parameter_handler = NULL;
15
16 /*********************************************************************
17 * _errno (MSVCRT.@)
18 */
19 int CDECL *_errno(void)
20 {
21 return &(msvcrt_get_thread_data()->thread_errno);
22 }
23
24 /*********************************************************************
25 * __doserrno (MSVCRT.@)
26 */
27 unsigned long* CDECL __doserrno(void)
28 {
29 return &(msvcrt_get_thread_data()->thread_doserrno);
30 }
31
32 /*********************************************************************
33 * _get_errno (MSVCRT.@)
34 */
35 errno_t CDECL _get_errno(int *pValue)
36 {
37 if (!pValue)
38 return EINVAL;
39
40 *pValue = *_errno();
41 return 0;
42 }
43
44 /*********************************************************************
45 * _get_doserrno (MSVCRT.@)
46 */
47 errno_t CDECL _get_doserrno(unsigned long *pValue)
48 {
49 if (!pValue)
50 return EINVAL;
51
52 *pValue = *__doserrno();
53 return 0;
54 }
55
56 /*********************************************************************
57 * _set_errno (MSVCRT.@)
58 */
59 errno_t CDECL _set_errno(int value)
60 {
61 *_errno() = value;
62 return 0;
63 }
64
65 /*********************************************************************
66 * _set_doserrno (MSVCRT.@)
67 */
68 errno_t CDECL _set_doserrno(unsigned long value)
69 {
70 *__doserrno() = value;
71 return 0;
72 }
73
74 /*
75 * This function sets both doserrno to the passed in OS error code
76 * and also maps this to an appropriate errno code. The mapping
77 * has been deduced automagically by running this functions, which
78 * exists in MSVCRT but is undocumented, on all the error codes in
79 * winerror.h.
80 */
81 void CDECL _dosmaperr(unsigned long oserror)
82 {
83 int pos, base, lim;
84
85 _set_doserrno(oserror);
86
87 /* Use binary chop to find the corresponding errno code */
88 for (base=0, lim=sizeof(doserrmap)/sizeof(doserrmap[0]); lim; lim >>= 1) {
89 pos = base+(lim >> 1);
90 if (doserrmap[pos].winerr == oserror) {
91 _set_errno(doserrmap[pos].en);
92 return;
93 } else if (doserrmap[pos].winerr < oserror) {
94 base = pos + 1;
95 --lim;
96 }
97 }
98 /* EINVAL appears to be the default */
99 _set_errno(EINVAL);
100 }
101
102 /******************************************************************************
103 * _set_error_mode (MSVCRT.@)
104 *
105 * Set the error mode, which describes where the C run-time writes error
106 * messages.
107 *
108 * PARAMS
109 * mode - the new error mode
110 *
111 * RETURNS
112 * The old error mode.
113 *
114 */
115 int msvcrt_error_mode = MSVCRT__OUT_TO_DEFAULT;
116
117 int CDECL _set_error_mode(int mode)
118 {
119 const int old = msvcrt_error_mode;
120 if ( MSVCRT__REPORT_ERRMODE != mode ) {
121 msvcrt_error_mode = mode;
122 }
123 return old;
124 }
125
126 /******************************************************************************
127 * _seterrormode (MSVCRT.@)
128 */
129 void CDECL _seterrormode(int mode)
130 {
131 SetErrorMode( mode );
132 }
133
134 /******************************************************************************
135 * _invalid_parameter (MSVCRT.@)
136 */
137 void __cdecl _invalid_parameter(const wchar_t *expr, const wchar_t *func,
138 const wchar_t *file, unsigned int line, uintptr_t arg)
139 {
140 if (invalid_parameter_handler) invalid_parameter_handler( expr, func, file, line, arg );
141 else
142 {
143 ERR( "%s:%u %s: %s %lx\n", debugstr_w(file), line, debugstr_w(func), debugstr_w(expr), arg );
144 #if _MSVCR_VER > 0 // FIXME: possible improvement: use a global variable in the DLL
145 RaiseException( STATUS_INVALID_CRUNTIME_PARAMETER, EXCEPTION_NONCONTINUABLE, 0, NULL );
146 #endif
147 }
148 }
149
150 /* _get_invalid_parameter_handler - not exported in native msvcrt, added in msvcr80 */
151 _invalid_parameter_handler CDECL _get_invalid_parameter_handler(void)
152 {
153 TRACE("\n");
154 return invalid_parameter_handler;
155 }
156
157 /* _set_invalid_parameter_handler - not exproted in native msvcrt, added in msvcr80 */
158 _invalid_parameter_handler CDECL _set_invalid_parameter_handler(
159 _invalid_parameter_handler handler)
160 {
161 _invalid_parameter_handler old = invalid_parameter_handler;
162
163 TRACE("(%p)\n", handler);
164
165 invalid_parameter_handler = handler;
166 return old;
167 }