oslibcfs.c revision 306536 
1/******************************************************************************
2 *
3 * Module Name: oslibcfs - C library OSL for file I/O
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2016, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions, and the following disclaimer,
16 *    without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 *    substantially similar to the "NO WARRANTY" disclaimer below
19 *    ("Disclaimer") and any redistribution must be conditioned upon
20 *    including a substantially similar Disclaimer requirement for further
21 *    binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 *    of any contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44#include <contrib/dev/acpica/include/acpi.h>
45#include <stdio.h>
46#include <stdarg.h>
47
48#define _COMPONENT          ACPI_OS_SERVICES
49        ACPI_MODULE_NAME    ("oslibcfs")
50
51
52/*******************************************************************************
53 *
54 * FUNCTION:    AcpiOsOpenFile
55 *
56 * PARAMETERS:  Path                - File path
57 *              Modes               - File operation type
58 *
59 * RETURN:      File descriptor.
60 *
61 * DESCRIPTION: Open a file for reading (ACPI_FILE_READING) or/and writing
62 *              (ACPI_FILE_WRITING).
63 *
64 ******************************************************************************/
65
66ACPI_FILE
67AcpiOsOpenFile (
68    const char              *Path,
69    UINT8                   Modes)
70{
71    ACPI_FILE               File;
72    UINT32                  i = 0;
73    char                    ModesStr[4];
74
75
76    if (Modes & ACPI_FILE_READING)
77    {
78        ModesStr[i++] = 'r';
79    }
80    if (Modes & ACPI_FILE_WRITING)
81    {
82        ModesStr[i++] = 'w';
83    }
84
85    if (Modes & ACPI_FILE_BINARY)
86    {
87        ModesStr[i++] = 'b';
88    }
89
90    ModesStr[i++] = '\0';
91
92    File = fopen (Path, ModesStr);
93    if (!File)
94    {
95        perror ("Could not open file");
96    }
97
98    return (File);
99}
100
101
102/*******************************************************************************
103 *
104 * FUNCTION:    AcpiOsCloseFile
105 *
106 * PARAMETERS:  File                - An open file descriptor
107 *
108 * RETURN:      None.
109 *
110 * DESCRIPTION: Close a file opened via AcpiOsOpenFile.
111 *
112 ******************************************************************************/
113
114void
115AcpiOsCloseFile (
116    ACPI_FILE               File)
117{
118
119    fclose (File);
120}
121
122
123/*******************************************************************************
124 *
125 * FUNCTION:    AcpiOsReadFile
126 *
127 * PARAMETERS:  File                - An open file descriptor
128 *              Buffer              - Data buffer
129 *              Size                - Data block size
130 *              Count               - Number of data blocks
131 *
132 * RETURN:      Number of bytes actually read.
133 *
134 * DESCRIPTION: Read from a file.
135 *
136 ******************************************************************************/
137
138int
139AcpiOsReadFile (
140    ACPI_FILE               File,
141    void                    *Buffer,
142    ACPI_SIZE               Size,
143    ACPI_SIZE               Count)
144{
145    int                     Length;
146
147
148    Length = fread (Buffer, Size, Count, File);
149    if (Length < 0)
150    {
151        perror ("Error reading file");
152    }
153
154    return (Length);
155}
156
157
158/*******************************************************************************
159 *
160 * FUNCTION:    AcpiOsWriteFile
161 *
162 * PARAMETERS:  File                - An open file descriptor
163 *              Buffer              - Data buffer
164 *              Size                - Data block size
165 *              Count               - Number of data blocks
166 *
167 * RETURN:      Number of bytes actually written.
168 *
169 * DESCRIPTION: Write to a file.
170 *
171 ******************************************************************************/
172
173int
174AcpiOsWriteFile (
175    ACPI_FILE               File,
176    void                    *Buffer,
177    ACPI_SIZE               Size,
178    ACPI_SIZE               Count)
179{
180    int                     Length;
181
182
183    Length = fwrite (Buffer, Size, Count, File);
184    if (Length < 0)
185    {
186        perror ("Error writing file");
187    }
188
189    return (Length);
190}
191
192
193/*******************************************************************************
194 *
195 * FUNCTION:    AcpiOsGetFileOffset
196 *
197 * PARAMETERS:  File                - An open file descriptor
198 *
199 * RETURN:      Current file pointer position.
200 *
201 * DESCRIPTION: Get current file offset.
202 *
203 ******************************************************************************/
204
205long
206AcpiOsGetFileOffset (
207    ACPI_FILE               File)
208{
209    long                    Offset;
210
211
212    Offset = ftell (File);
213    return (Offset);
214}
215
216
217/*******************************************************************************
218 *
219 * FUNCTION:    AcpiOsSetFileOffset
220 *
221 * PARAMETERS:  File                - An open file descriptor
222 *              Offset              - New file offset
223 *              From                - From begin/end of file
224 *
225 * RETURN:      Status
226 *
227 * DESCRIPTION: Set current file offset.
228 *
229 ******************************************************************************/
230
231ACPI_STATUS
232AcpiOsSetFileOffset (
233    ACPI_FILE               File,
234    long                    Offset,
235    UINT8                   From)
236{
237    int                     Ret = 0;
238
239
240    if (From == ACPI_FILE_BEGIN)
241    {
242        Ret = fseek (File, Offset, SEEK_SET);
243    }
244
245    if (From == ACPI_FILE_END)
246    {
247        Ret = fseek (File, Offset, SEEK_END);
248    }
249
250    if (Ret < 0)
251    {
252        return (AE_ERROR);
253    }
254    else
255    {
256        return (AE_OK);
257    }
258}
259