Coverage Report

Created: 2025-07-23 08:18

/src/libzip/lib/zip_stat_index.c
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/*
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  zip_stat_index.c -- get information about file by index
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  Copyright (C) 1999-2024 Dieter Baron and Thomas Klausner
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  This file is part of libzip, a library to manipulate ZIP archives.
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  The authors can be contacted at <info@libzip.org>
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  Redistribution and use in source and binary forms, with or without
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  modification, are permitted provided that the following conditions
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  are met:
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  1. Redistributions of source code must retain the above copyright
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     notice, this list of conditions and the following disclaimer.
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  2. Redistributions in binary form must reproduce the above copyright
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     notice, this list of conditions and the following disclaimer in
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     the documentation and/or other materials provided with the
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     distribution.
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  3. The names of the authors may not be used to endorse or promote
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     products derived from this software without specific prior
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     written permission.
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  THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
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  OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
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  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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  IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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  IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "zipint.h"
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ZIP_EXTERN int
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zip_stat_index(zip_t *za, zip_uint64_t index, zip_flags_t flags, zip_stat_t *st) {
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    const char *name;
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    zip_dirent_t *de;
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    zip_entry_t *entry;
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    if ((de = _zip_get_dirent(za, index, flags, NULL)) == NULL) {
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        return -1;
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    }
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    if ((name = zip_get_name(za, index, flags)) == NULL) {
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        return -1;
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    }
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    entry = za->entry + index;
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    if ((flags & ZIP_FL_UNCHANGED) == 0 && ZIP_ENTRY_DATA_CHANGED(za->entry + index)) {
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        if (zip_source_stat(entry->source, st) < 0) {
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            zip_error_set(&za->error, ZIP_ER_CHANGED, 0);
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            return -1;
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        }
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        if (ZIP_CM_IS_DEFAULT(de->comp_method)) {
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            if (!(st->valid & ZIP_STAT_COMP_METHOD) || st->comp_method == ZIP_CM_STORE) {
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                st->valid &= ~(ZIP_STAT_COMP_SIZE|ZIP_STAT_COMP_METHOD);
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            }
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        }
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        else {
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            if ((st->valid & ZIP_STAT_COMP_METHOD) && st->comp_method != de->comp_method) {
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                st->valid &= ~ZIP_STAT_COMP_SIZE;
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            }
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            st->valid |= ZIP_STAT_COMP_METHOD;
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            st->comp_method = de->comp_method;
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        }
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        if (((st->valid & (ZIP_STAT_COMP_METHOD|ZIP_STAT_SIZE)) == (ZIP_STAT_COMP_METHOD|ZIP_STAT_SIZE)) && st->comp_method == ZIP_CM_STORE) {
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            st->valid |= ZIP_STAT_COMP_SIZE;
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            st->comp_size = st->size;
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        }
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        if (entry->changes != NULL && entry->changes->changed & ZIP_DIRENT_LAST_MOD) {
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            st->mtime = zip_dirent_get_last_mod_mtime(de);
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            st->valid |= ZIP_STAT_MTIME;
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        }
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    }
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    else {
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        zip_stat_init(st);
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        st->crc = de->crc;
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        st->size = de->uncomp_size;
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        st->mtime = zip_dirent_get_last_mod_mtime(de);
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        st->comp_size = de->comp_size;
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        st->comp_method = (zip_uint16_t)de->comp_method;
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        st->encryption_method = de->encryption_method;
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        st->valid = (de->crc_valid ? ZIP_STAT_CRC : 0) | ZIP_STAT_SIZE | ZIP_STAT_MTIME | ZIP_STAT_COMP_SIZE | ZIP_STAT_COMP_METHOD | ZIP_STAT_ENCRYPTION_METHOD;
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        if (entry->changes != NULL && entry->changes->changed & ZIP_DIRENT_COMP_METHOD) {
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            st->valid &= ~ZIP_STAT_COMP_SIZE;
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        }
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    }
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    if ((za->ch_flags & ZIP_AFL_WANT_TORRENTZIP) && (flags & ZIP_FL_UNCHANGED) == 0) {
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        if (za->torrent_mtime == 0) {
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            zip_dostime_t dostime = {0xbc00, 0x2198};
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            za->torrent_mtime = _zip_d2u_time(&dostime);
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        }
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        st->comp_method = ZIP_CM_DEFLATE;
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        st->mtime = za->torrent_mtime;
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        st->valid |= ZIP_STAT_MTIME | ZIP_STAT_COMP_METHOD;
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        st->valid &= ~ZIP_STAT_COMP_SIZE;
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    }
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    st->index = index;
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    st->name = name;
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    st->valid |= ZIP_STAT_INDEX | ZIP_STAT_NAME;
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    return 0;
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}