1 /******************************************************************************
2 *
3 * Module Name: cmfsize - Common get file size function
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2023, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44 #include "acpi.h"
45 #include "accommon.h"
46 #include "acapps.h"
47
48 #define _COMPONENT ACPI_TOOLS
49 ACPI_MODULE_NAME ("cmfsize")
50
51
52 /*******************************************************************************
53 *
54 * FUNCTION: CmGetFileSize
55 *
56 * PARAMETERS: File - Open file descriptor
57 *
58 * RETURN: File Size. On error, -1 (ACPI_UINT32_MAX)
59 *
60 * DESCRIPTION: Get the size of a file. Uses seek-to-EOF. File must be open.
61 * Does not disturb the current file pointer.
62 *
63 ******************************************************************************/
64
65 UINT32
CmGetFileSize(ACPI_FILE File)66 CmGetFileSize (
67 ACPI_FILE File)
68 {
69 long FileSize;
70 long CurrentOffset;
71 ACPI_STATUS Status;
72
73
74 /* Save the current file pointer, seek to EOF to obtain file size */
75
76 CurrentOffset = ftell (File);
77 if (CurrentOffset < 0)
78 {
79 goto OffsetError;
80 }
81
82 Status = fseek (File, 0, SEEK_END);
83 if (ACPI_FAILURE (Status))
84 {
85 goto SeekError;
86 }
87
88 FileSize = ftell (File);
89 if (FileSize < 0)
90 {
91 goto OffsetError;
92 }
93
94 /* Restore original file pointer */
95
96 Status = fseek (File, CurrentOffset, SEEK_SET);
97 if (ACPI_FAILURE (Status))
98 {
99 goto SeekError;
100 }
101
102 return ((UINT32) FileSize);
103
104
105 OffsetError:
106 fprintf (stderr, "Could not get file offset\n");
107 return (ACPI_UINT32_MAX);
108
109 SeekError:
110 fprintf (stderr, "Could not set file offset\n");
111 return (ACPI_UINT32_MAX);
112 }
113