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/******************************************************************************
*
* Module Name: oslibcfs - C library OSL for file I/O
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2015, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include <stdio.h>
#include <stdarg.h>
#define _COMPONENT ACPI_OS_SERVICES
ACPI_MODULE_NAME("oslibcfs")
/*******************************************************************************
*
* FUNCTION: acpi_os_open_file
*
* PARAMETERS: path - File path
* modes - File operation type
*
* RETURN: File descriptor.
*
* DESCRIPTION: Open a file for reading (ACPI_FILE_READING) or/and writing
* (ACPI_FILE_WRITING).
*
******************************************************************************/
ACPI_FILE acpi_os_open_file(const char *path, u8 modes)
{
ACPI_FILE file;
u32 i = 0;
char modes_str[4];
if (modes & ACPI_FILE_READING) {
modes_str[i++] = 'r';
}
if (modes & ACPI_FILE_WRITING) {
modes_str[i++] = 'w';
}
if (modes & ACPI_FILE_BINARY) {
modes_str[i++] = 'b';
}
modes_str[i++] = '\0';
file = fopen(path, modes_str);
if (!file) {
perror("Could not open file");
}
return (file);
}
/*******************************************************************************
*
* FUNCTION: acpi_os_close_file
*
* PARAMETERS: file - An open file descriptor
*
* RETURN: None.
*
* DESCRIPTION: Close a file opened via acpi_os_open_file.
*
******************************************************************************/
void acpi_os_close_file(ACPI_FILE file)
{
fclose(file);
}
/*******************************************************************************
*
* FUNCTION: acpi_os_read_file
*
* PARAMETERS: file - An open file descriptor
* buffer - Data buffer
* size - Data block size
* count - Number of data blocks
*
* RETURN: Number of bytes actually read.
*
* DESCRIPTION: Read from a file.
*
******************************************************************************/
int
acpi_os_read_file(ACPI_FILE file, void *buffer, acpi_size size, acpi_size count)
{
int length;
length = fread(buffer, size, count, file);
if (length < 0) {
perror("Error reading file");
}
return (length);
}
/*******************************************************************************
*
* FUNCTION: acpi_os_write_file
*
* PARAMETERS: file - An open file descriptor
* buffer - Data buffer
* size - Data block size
* count - Number of data blocks
*
* RETURN: Number of bytes actually written.
*
* DESCRIPTION: Write to a file.
*
******************************************************************************/
int
acpi_os_write_file(ACPI_FILE file,
void *buffer, acpi_size size, acpi_size count)
{
int length;
length = fwrite(buffer, size, count, file);
if (length < 0) {
perror("Error writing file");
}
return (length);
}
/*******************************************************************************
*
* FUNCTION: acpi_os_get_file_offset
*
* PARAMETERS: file - An open file descriptor
*
* RETURN: Current file pointer position.
*
* DESCRIPTION: Get current file offset.
*
******************************************************************************/
long acpi_os_get_file_offset(ACPI_FILE file)
{
long offset;
offset = ftell(file);
return (offset);
}
/*******************************************************************************
*
* FUNCTION: acpi_os_set_file_offset
*
* PARAMETERS: file - An open file descriptor
* offset - New file offset
* from - From begin/end of file
*
* RETURN: Status
*
* DESCRIPTION: Set current file offset.
*
******************************************************************************/
acpi_status acpi_os_set_file_offset(ACPI_FILE file, long offset, u8 from)
{
int ret = 0;
if (from == ACPI_FILE_BEGIN) {
ret = fseek(file, offset, SEEK_SET);
}
if (from == ACPI_FILE_END) {
ret = fseek(file, offset, SEEK_END);
}
if (ret < 0) {
return (AE_ERROR);
} else {
return (AE_OK);
}
}
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