1 /******************************************************************************
3 * Module Name: oslibcfs - C library OSL for file I/O
5 *****************************************************************************/
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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 ******************************************************************************/
76 if (Modes & ACPI_FILE_READING)
80 if (Modes & ACPI_FILE_WRITING)
84 if (Modes & ACPI_FILE_BINARY)
91 File = fopen (Path, ModesStr);
94 perror ("Could not open file");
101 /*******************************************************************************
103 * FUNCTION: AcpiOsCloseFile
105 * PARAMETERS: File - An open file descriptor
109 * DESCRIPTION: Close a file opened via AcpiOsOpenFile.
111 ******************************************************************************/
121 /*******************************************************************************
123 * FUNCTION: AcpiOsReadFile
125 * PARAMETERS: File - An open file descriptor
126 * Buffer - Data buffer
127 * Size - Data block size
128 * Count - Number of data blocks
130 * RETURN: Number of bytes actually read.
132 * DESCRIPTION: Read from a file.
134 ******************************************************************************/
146 Length = fread (Buffer, Size, Count, File);
149 perror ("Error reading file");
156 /*******************************************************************************
158 * FUNCTION: AcpiOsWriteFile
160 * PARAMETERS: File - An open file descriptor
161 * Buffer - Data buffer
162 * Size - Data block size
163 * Count - Number of data blocks
165 * RETURN: Number of bytes actually written.
167 * DESCRIPTION: Write to a file.
169 ******************************************************************************/
181 Length = fwrite (Buffer, Size, Count, File);
184 perror ("Error writing file");
191 /*******************************************************************************
193 * FUNCTION: AcpiOsGetFileOffset
195 * PARAMETERS: File - An open file descriptor
197 * RETURN: Current file pointer position.
199 * DESCRIPTION: Get current file offset.
201 ******************************************************************************/
204 AcpiOsGetFileOffset (
210 Offset = ftell (File);
215 /*******************************************************************************
217 * FUNCTION: AcpiOsSetFileOffset
219 * PARAMETERS: File - An open file descriptor
220 * Offset - New file offset
221 * From - From begin/end of file
225 * DESCRIPTION: Set current file offset.
227 ******************************************************************************/
230 AcpiOsSetFileOffset (
238 if (From == ACPI_FILE_BEGIN)
240 Ret = fseek (File, Offset, SEEK_SET);
242 if (From == ACPI_FILE_END)
244 Ret = fseek (File, Offset, SEEK_END);