1228753Smm/*- 2228753Smm * Copyright (c) 2003-2007 Tim Kientzle 3228753Smm * All rights reserved. 4228753Smm * 5228753Smm * Redistribution and use in source and binary forms, with or without 6228753Smm * modification, are permitted provided that the following conditions 7228753Smm * are met: 8228753Smm * 1. Redistributions of source code must retain the above copyright 9228753Smm * notice, this list of conditions and the following disclaimer. 10228753Smm * 2. Redistributions in binary form must reproduce the above copyright 11228753Smm * notice, this list of conditions and the following disclaimer in the 12228753Smm * documentation and/or other materials provided with the distribution. 13228753Smm * 14228753Smm * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 15228753Smm * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16228753Smm * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17228753Smm * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 18228753Smm * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19228753Smm * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20228753Smm * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21228753Smm * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22228753Smm * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23228753Smm * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24228753Smm */ 25228753Smm 26228753Smm#include "archive_platform.h" 27229592Smm__FBSDID("$FreeBSD$"); 28228753Smm 29228753Smm#include "archive.h" 30228753Smm#include "archive_entry.h" 31228753Smm#include "archive_private.h" 32228753Smm#include "archive_read_private.h" 33228753Smm 34228753Smmstatic int archive_read_format_empty_bid(struct archive_read *); 35228753Smmstatic int archive_read_format_empty_read_data(struct archive_read *, 36228753Smm const void **, size_t *, off_t *); 37228753Smmstatic int archive_read_format_empty_read_header(struct archive_read *, 38228753Smm struct archive_entry *); 39228753Smmint 40228753Smmarchive_read_support_format_empty(struct archive *_a) 41228753Smm{ 42228753Smm struct archive_read *a = (struct archive_read *)_a; 43228753Smm int r; 44228753Smm 45228753Smm r = __archive_read_register_format(a, 46228753Smm NULL, 47228753Smm NULL, 48228753Smm archive_read_format_empty_bid, 49228753Smm NULL, 50228753Smm archive_read_format_empty_read_header, 51228753Smm archive_read_format_empty_read_data, 52228753Smm NULL, 53228753Smm NULL); 54228753Smm 55228753Smm return (r); 56228753Smm} 57228753Smm 58228753Smm 59228753Smmstatic int 60228753Smmarchive_read_format_empty_bid(struct archive_read *a) 61228753Smm{ 62228753Smm ssize_t avail; 63228753Smm 64228753Smm (void)__archive_read_ahead(a, 1, &avail); 65228753Smm if (avail != 0) 66228753Smm return (-1); 67228753Smm return (1); 68228753Smm} 69228753Smm 70228753Smmstatic int 71228753Smmarchive_read_format_empty_read_header(struct archive_read *a, 72228753Smm struct archive_entry *entry) 73228753Smm{ 74228753Smm (void)a; /* UNUSED */ 75228753Smm (void)entry; /* UNUSED */ 76228753Smm 77228753Smm a->archive.archive_format = ARCHIVE_FORMAT_EMPTY; 78228753Smm a->archive.archive_format_name = "Empty file"; 79228753Smm 80228753Smm return (ARCHIVE_EOF); 81228753Smm} 82228753Smm 83228753Smmstatic int 84228753Smmarchive_read_format_empty_read_data(struct archive_read *a, 85228753Smm const void **buff, size_t *size, off_t *offset) 86228753Smm{ 87228753Smm (void)a; /* UNUSED */ 88228753Smm (void)buff; /* UNUSED */ 89228753Smm (void)size; /* UNUSED */ 90228753Smm (void)offset; /* UNUSED */ 91228753Smm 92228753Smm return (ARCHIVE_EOF); 93228753Smm} 94