1 /******************************************************************************
3 * Module Name: oslibcfs - C library OSL for file IO
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2014, Intel Corp.
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23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
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48 #define _COMPONENT ACPI_OS_SERVICES
49 ACPI_MODULE_NAME ("oslibcfs")
52 /*******************************************************************************
54 * FUNCTION: AcpiOsOpenFile
56 * PARAMETERS: Path - File path
57 * Modes - File operation type
59 * RETURN: File descriptor.
61 * DESCRIPTION: Open a file for reading (ACPI_FILE_READING) or/and writing
62 * (ACPI_FILE_WRITING).
64 ******************************************************************************/
75 if (Modes & ACPI_FILE_READING)
79 if (Modes & ACPI_FILE_WRITING)
83 if (Modes & ACPI_FILE_BINARY)
89 File = fopen (Path, ModesStr);
92 perror ("Could not open file");
99 /*******************************************************************************
101 * FUNCTION: AcpiOsCloseFile
103 * PARAMETERS: File - File descriptor
107 * DESCRIPTION: Close a file.
109 ******************************************************************************/
119 /*******************************************************************************
121 * FUNCTION: AcpiOsReadFile
123 * PARAMETERS: File - File descriptor
124 * Buffer - Data buffer
125 * Size - Data block size
126 * Count - Number of data blocks
128 * RETURN: Size of successfully read buffer.
130 * DESCRIPTION: Read a file.
132 ******************************************************************************/
143 Length = fread (Buffer, Size, Count, File);
146 perror ("Error reading file");
153 /*******************************************************************************
155 * FUNCTION: AcpiOsWriteFile
157 * PARAMETERS: File - File descriptor
158 * Buffer - Data buffer
159 * Size - Data block size
160 * Count - Number of data blocks
162 * RETURN: Size of successfully written buffer.
164 * DESCRIPTION: Write a file.
166 ******************************************************************************/
177 Length = fwrite (Buffer, Size, Count, File);
180 perror ("Error writing file");
187 /*******************************************************************************
189 * FUNCTION: AcpiOsGetFileOffset
191 * PARAMETERS: File - File descriptor
193 * RETURN: Size of current position.
195 * DESCRIPTION: Get current file offset.
197 ******************************************************************************/
200 AcpiOsGetFileOffset (
205 Offset = ftell (File);
211 /*******************************************************************************
213 * FUNCTION: AcpiOsSetFileOffset
215 * PARAMETERS: File - File descriptor
216 * Offset - File offset
217 * From - From begin/end of file
221 * DESCRIPTION: Set current file offset.
223 ******************************************************************************/
226 AcpiOsSetFileOffset (
234 if (From == ACPI_FILE_BEGIN)
236 Ret = fseek (File, Offset, SEEK_SET);
238 if (From == ACPI_FILE_END)
240 Ret = fseek (File, Offset, SEEK_END);