xref: /reactos/dll/win32/kernel32/client/file/lfile.c (revision cc439606) 
1 /*
2  * COPYRIGHT:       See COPYING in the top level directory
3  * PROJECT:         ReactOS system libraries
4  * FILE:            dll/win32/kernel32/client/file/lfile.c
5  * PURPOSE:         Find functions
6  * PROGRAMMER:      Ariadne ( ariadne@xs4all.nl)
7  * UPDATE HISTORY:
8  *                  Created 01/11/98
9  */
10 
11 #include <k32.h>
12 #define NDEBUG
13 #include <debug.h>
14 
15 /*
16  * @implemented
17  */
18 long
19 WINAPI
20 _hread(HFILE hFile, LPVOID lpBuffer, long lBytes)
21 {
22     DWORD NumberOfBytesRead;
23 
24     if (!ReadFile(LongToHandle(hFile),
25                   lpBuffer,
26                   (DWORD) lBytes,
27                   &NumberOfBytesRead,
28                   NULL))
29     {
30         return HFILE_ERROR;
31     }
32     return NumberOfBytesRead;
33 }
34 
35 
36 /*
37  * @implemented
38  */
39 long
40 WINAPI
41 _hwrite(HFILE hFile, LPCSTR lpBuffer, long lBytes)
42 {
43     DWORD NumberOfBytesWritten;
44 
45     if (lBytes == 0)
46     {
47         if (!SetEndOfFile((HANDLE)(ULONG_PTR) hFile))
48         {
49             return HFILE_ERROR;
50         }
51         return 0;
52     }
53     if (!WriteFile(LongToHandle(hFile),
54                    (LPVOID) lpBuffer,
55                    (DWORD) lBytes,
56                    &NumberOfBytesWritten,
57                    NULL))
58     {
59         return HFILE_ERROR;
60     }
61     return NumberOfBytesWritten;
62 }
63 
64 
65 /*
66  * @implemented
67  */
68 HFILE
69 WINAPI
70 _lopen(LPCSTR lpPathName, int iReadWrite)
71 {
72     DWORD dwAccess, dwSharing, dwCreation;
73 
74     if (iReadWrite & OF_CREATE)
75     {
76         dwCreation = CREATE_ALWAYS;
77         dwAccess = GENERIC_READ | GENERIC_WRITE;
78     }
79     else
80     {
81         dwCreation = OPEN_EXISTING;
82         switch(iReadWrite & 0x03)
83         {
84             case OF_READ:      dwAccess = GENERIC_READ; break;
85             case OF_WRITE:     dwAccess = GENERIC_WRITE; break;
86             case OF_READWRITE: dwAccess = GENERIC_READ | GENERIC_WRITE; break;
87             default:           dwAccess = 0; break;
88         }
89     }
90 
91     switch(iReadWrite & 0x70)
92     {
93         case OF_SHARE_EXCLUSIVE:  dwSharing = 0; break;
94         case OF_SHARE_DENY_WRITE: dwSharing = FILE_SHARE_READ; break;
95         case OF_SHARE_DENY_READ:  dwSharing = FILE_SHARE_WRITE; break;
96         case OF_SHARE_DENY_NONE:
97         case OF_SHARE_COMPAT:
98         default:                  dwSharing = FILE_SHARE_READ | FILE_SHARE_WRITE; break;
99     }
100 
101     return (HFILE)(ULONG_PTR) CreateFileA(lpPathName,
102                                dwAccess,
103                                dwSharing,
104                                NULL,
105                                dwCreation,
106                                FILE_ATTRIBUTE_NORMAL,
107                                NULL);
108 }
109 
110 
111 /*
112  * @implemented
113  */
114 HFILE
115 WINAPI
116 _lcreat(LPCSTR lpPathName, int iAttribute)
117 {
118     HANDLE hFile;
119 
120     iAttribute &= FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM;
121     hFile = CreateFileA(lpPathName,
122                         GENERIC_READ | GENERIC_WRITE,
123                         (FILE_SHARE_READ | FILE_SHARE_WRITE),
124                         NULL,
125                         CREATE_ALWAYS,
126                         iAttribute,
127                         NULL);
128 
129     return HandleToLong(hFile);
130 }
131 
132 
133 /*
134  * @implemented
135  */
136 int
137 WINAPI
138 _lclose(HFILE hFile)
139 {
140     return CloseHandle(LongToHandle(hFile)) ? 0 : HFILE_ERROR;
141 }
142 
143 
144 /*
145  * @implemented
146  */
147 LONG
148 WINAPI
149 _llseek(HFILE hFile, LONG lOffset, int iOrigin)
150 {
151     return SetFilePointer(LongToHandle(hFile),
152                           lOffset,
153                           NULL,
154                           (DWORD) iOrigin);
155 }
156 
157 /* EOF */
158