diff options
Diffstat (limited to 'tools/power/acpi/os_specific/service_layers/oslibcfs.c')
| -rw-r--r-- | tools/power/acpi/os_specific/service_layers/oslibcfs.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/tools/power/acpi/os_specific/service_layers/oslibcfs.c b/tools/power/acpi/os_specific/service_layers/oslibcfs.c new file mode 100644 index 000000000000..2da0ce885c8c --- /dev/null +++ b/tools/power/acpi/os_specific/service_layers/oslibcfs.c @@ -0,0 +1,214 @@ +/****************************************************************************** + * + * Module Name: oslibcfs - C library OSL for file IO + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2014, 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; + char modes_str[4]; + u32 i = 0; + + 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 - File descriptor + * + * RETURN: None. + * + * DESCRIPTION: Close a file. + * + ******************************************************************************/ + +void acpi_os_close_file(ACPI_FILE file) +{ + fclose(file); +} + +/******************************************************************************* + * + * FUNCTION: acpi_os_read_file + * + * PARAMETERS: file - File descriptor + * buffer - Data buffer + * size - Data block size + * count - Number of data blocks + * + * RETURN: Size of successfully read buffer. + * + * DESCRIPTION: Read 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 - File descriptor + * buffer - Data buffer + * size - Data block size + * count - Number of data blocks + * + * RETURN: Size of successfully written buffer. + * + * DESCRIPTION: Write 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 - File descriptor + * + * RETURN: Size of current 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 - File descriptor + * offset - 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); + } +} |