256 lines
6.8 KiB
C
256 lines
6.8 KiB
C
/******************************************************************************
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*
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* Module Name: oslibcfs - C library OSL for file I/O
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2015, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <contrib/dev/acpica/include/acpi.h>
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#include <stdio.h>
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#include <stdarg.h>
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#define _COMPONENT ACPI_OS_SERVICES
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ACPI_MODULE_NAME ("oslibcfs")
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/*******************************************************************************
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*
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* FUNCTION: AcpiOsOpenFile
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*
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* PARAMETERS: Path - File path
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* Modes - File operation type
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*
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* RETURN: File descriptor.
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*
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* DESCRIPTION: Open a file for reading (ACPI_FILE_READING) or/and writing
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* (ACPI_FILE_WRITING).
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*
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******************************************************************************/
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ACPI_FILE
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AcpiOsOpenFile (
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const char *Path,
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UINT8 Modes)
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{
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ACPI_FILE File;
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UINT32 i = 0;
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char ModesStr[4];
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if (Modes & ACPI_FILE_READING)
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{
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ModesStr[i++] = 'r';
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}
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if (Modes & ACPI_FILE_WRITING)
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{
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ModesStr[i++] = 'w';
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}
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if (Modes & ACPI_FILE_BINARY)
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{
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ModesStr[i++] = 'b';
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}
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ModesStr[i++] = '\0';
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File = fopen (Path, ModesStr);
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if (!File)
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{
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perror ("Could not open file");
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}
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return (File);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiOsCloseFile
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*
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* PARAMETERS: File - An open file descriptor
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*
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* RETURN: None.
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*
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* DESCRIPTION: Close a file opened via AcpiOsOpenFile.
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*
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******************************************************************************/
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void
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AcpiOsCloseFile (
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ACPI_FILE File)
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{
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fclose (File);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiOsReadFile
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*
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* PARAMETERS: File - An open file descriptor
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* Buffer - Data buffer
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* Size - Data block size
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* Count - Number of data blocks
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*
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* RETURN: Number of bytes actually read.
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*
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* DESCRIPTION: Read from a file.
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*
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******************************************************************************/
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int
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AcpiOsReadFile (
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ACPI_FILE File,
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void *Buffer,
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ACPI_SIZE Size,
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ACPI_SIZE Count)
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{
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int Length;
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Length = fread (Buffer, Size, Count, File);
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if (Length < 0)
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{
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perror ("Error reading file");
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}
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return (Length);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiOsWriteFile
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*
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* PARAMETERS: File - An open file descriptor
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* Buffer - Data buffer
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* Size - Data block size
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* Count - Number of data blocks
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*
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* RETURN: Number of bytes actually written.
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*
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* DESCRIPTION: Write to a file.
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*
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******************************************************************************/
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int
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AcpiOsWriteFile (
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ACPI_FILE File,
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void *Buffer,
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ACPI_SIZE Size,
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ACPI_SIZE Count)
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{
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int Length;
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Length = fwrite (Buffer, Size, Count, File);
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if (Length < 0)
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{
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perror ("Error writing file");
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}
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return (Length);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiOsGetFileOffset
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*
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* PARAMETERS: File - An open file descriptor
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*
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* RETURN: Current file pointer position.
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*
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* DESCRIPTION: Get current file offset.
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*
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******************************************************************************/
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long
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AcpiOsGetFileOffset (
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ACPI_FILE File)
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{
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long Offset;
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Offset = ftell (File);
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return (Offset);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiOsSetFileOffset
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*
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* PARAMETERS: File - An open file descriptor
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* Offset - New file offset
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* From - From begin/end of file
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*
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* RETURN: Status
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*
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* DESCRIPTION: Set current file offset.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiOsSetFileOffset (
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ACPI_FILE File,
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long Offset,
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UINT8 From)
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{
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int Ret = 0;
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if (From == ACPI_FILE_BEGIN)
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{
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Ret = fseek (File, Offset, SEEK_SET);
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}
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if (From == ACPI_FILE_END)
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{
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Ret = fseek (File, Offset, SEEK_END);
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}
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if (Ret < 0)
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{
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return (AE_ERROR);
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}
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else
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{
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return (AE_OK);
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}
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}
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