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 <contrib/dev/acpica/include/acpi.h> 45 #include <contrib/dev/acpica/include/accommon.h> 46 #include <contrib/dev/acpica/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 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