1 /****************************************************************************** 2 * 3 * Module Name: cfsize - Common get file size function 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2016, 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 MERCHANTIBILITY 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 #include <stdio.h> 48 49 #define _COMPONENT ACPI_TOOLS 50 ACPI_MODULE_NAME ("cmfsize") 51 52 53 /******************************************************************************* 54 * 55 * FUNCTION: CmGetFileSize 56 * 57 * PARAMETERS: File - Open file descriptor 58 * 59 * RETURN: File Size. On error, -1 (ACPI_UINT32_MAX) 60 * 61 * DESCRIPTION: Get the size of a file. Uses seek-to-EOF. File must be open. 62 * Does not disturb the current file pointer. 63 * 64 ******************************************************************************/ 65 66 UINT32 67 CmGetFileSize ( 68 ACPI_FILE File) 69 { 70 long FileSize; 71 long CurrentOffset; 72 ACPI_STATUS Status; 73 74 75 /* Save the current file pointer, seek to EOF to obtain file size */ 76 77 CurrentOffset = AcpiOsGetFileOffset (File); 78 if (CurrentOffset < 0) 79 { 80 goto OffsetError; 81 } 82 83 Status = AcpiOsSetFileOffset (File, 0, ACPI_FILE_END); 84 if (ACPI_FAILURE (Status)) 85 { 86 goto SeekError; 87 } 88 89 FileSize = AcpiOsGetFileOffset (File); 90 if (FileSize < 0) 91 { 92 goto OffsetError; 93 } 94 95 /* Restore original file pointer */ 96 97 Status = AcpiOsSetFileOffset (File, CurrentOffset, ACPI_FILE_BEGIN); 98 if (ACPI_FAILURE (Status)) 99 { 100 goto SeekError; 101 } 102 103 return ((UINT32) FileSize); 104 105 106 OffsetError: 107 AcpiLogError ("Could not get file offset"); 108 return (ACPI_UINT32_MAX); 109 110 SeekError: 111 AcpiLogError ("Could not set file offset"); 112 return (ACPI_UINT32_MAX); 113 } 114