1 | // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
2 | /****************************************************************************** |
3 | * |
4 | * Module Name: cmfsize - Common get file size function |
5 | * |
6 | * Copyright (C) 2000 - 2023, Intel Corp. |
7 | * |
8 | *****************************************************************************/ |
9 | |
10 | #include <acpi/acpi.h> |
11 | #include "accommon.h" |
12 | #include "acapps.h" |
13 | |
14 | #define _COMPONENT ACPI_TOOLS |
15 | ACPI_MODULE_NAME("cmfsize" ) |
16 | |
17 | /******************************************************************************* |
18 | * |
19 | * FUNCTION: cm_get_file_size |
20 | * |
21 | * PARAMETERS: file - Open file descriptor |
22 | * |
23 | * RETURN: File Size. On error, -1 (ACPI_UINT32_MAX) |
24 | * |
25 | * DESCRIPTION: Get the size of a file. Uses seek-to-EOF. File must be open. |
26 | * Does not disturb the current file pointer. |
27 | * |
28 | ******************************************************************************/ |
29 | u32 cm_get_file_size(ACPI_FILE file) |
30 | { |
31 | long file_size; |
32 | long current_offset; |
33 | acpi_status status; |
34 | |
35 | /* Save the current file pointer, seek to EOF to obtain file size */ |
36 | |
37 | current_offset = ftell(file); |
38 | if (current_offset < 0) { |
39 | goto offset_error; |
40 | } |
41 | |
42 | status = fseek(file, 0, SEEK_END); |
43 | if (ACPI_FAILURE(status)) { |
44 | goto seek_error; |
45 | } |
46 | |
47 | file_size = ftell(file); |
48 | if (file_size < 0) { |
49 | goto offset_error; |
50 | } |
51 | |
52 | /* Restore original file pointer */ |
53 | |
54 | status = fseek(file, current_offset, SEEK_SET); |
55 | if (ACPI_FAILURE(status)) { |
56 | goto seek_error; |
57 | } |
58 | |
59 | return ((u32)file_size); |
60 | |
61 | offset_error: |
62 | fprintf(stderr, "Could not get file offset\n" ); |
63 | return (ACPI_UINT32_MAX); |
64 | |
65 | seek_error: |
66 | fprintf(stderr, "Could not set file offset\n" ); |
67 | return (ACPI_UINT32_MAX); |
68 | } |
69 | |