Annotation of embedaddon/php/ext/zip/lib/zip_file_get_offset.c, revision 1.1
1.1 ! misho 1: /*
! 2: zip_file_get_offset.c -- get offset of file data in archive.
! 3: Copyright (C) 1999-2007 Dieter Baron and Thomas Klausner
! 4:
! 5: This file is part of libzip, a library to manipulate ZIP archives.
! 6: The authors can be contacted at <libzip@nih.at>
! 7:
! 8: Redistribution and use in source and binary forms, with or without
! 9: modification, are permitted provided that the following conditions
! 10: are met:
! 11: 1. Redistributions of source code must retain the above copyright
! 12: notice, this list of conditions and the following disclaimer.
! 13: 2. Redistributions in binary form must reproduce the above copyright
! 14: notice, this list of conditions and the following disclaimer in
! 15: the documentation and/or other materials provided with the
! 16: distribution.
! 17: 3. The names of the authors may not be used to endorse or promote
! 18: products derived from this software without specific prior
! 19: written permission.
! 20:
! 21: THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
! 22: OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
! 23: WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 24: ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
! 25: DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 26: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
! 27: GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 28: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
! 29: IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
! 30: OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
! 31: IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 32: */
! 33:
! 34:
! 35:
! 36: #include <stdio.h>
! 37: #include <stdlib.h>
! 38: #include <string.h>
! 39: #include <errno.h>
! 40: #include <sys/types.h>
! 41: #include <sys/stat.h>
! 42:
! 43: #include "zipint.h"
! 44:
! 45:
! 46:
! 47: /* _zip_file_get_offset(za, ze):
! 48: Returns the offset of the file data for entry ze.
! 49:
! 50: On error, fills in za->error and returns 0.
! 51: */
! 52:
! 53: unsigned int
! 54: _zip_file_get_offset(struct zip *za, int idx)
! 55: {
! 56: struct zip_dirent de;
! 57: unsigned int offset;
! 58:
! 59: offset = za->cdir->entry[idx].offset;
! 60:
! 61: if (fseeko(za->zp, offset, SEEK_SET) != 0) {
! 62: _zip_error_set(&za->error, ZIP_ER_SEEK, errno);
! 63: return 0;
! 64: }
! 65:
! 66: if (_zip_dirent_read(&de, za->zp, NULL, NULL, 1, &za->error) != 0)
! 67: return 0;
! 68:
! 69: offset += LENTRYSIZE + de.filename_len + de.extrafield_len;
! 70:
! 71: _zip_dirent_finalize(&de);
! 72:
! 73: return offset;
! 74: }
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