contrib/libarchive-2.0/libarchive/archive_read_data_into_buffer.c

   1 /*-
   2  * Copyright (c) 2003-2007 Tim Kientzle
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17  * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
  18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "archive_platform.h"
  27 __FBSDID("$FreeBSD: src/lib/libarchive/archive_read_data_into_buffer.c,v 1.6 2007/01/09 08:05:55 kientzle Exp $");
  28
  29 #ifdef HAVE_STRING_H
  30 #include <string.h>
  31 #endif
  32
  33 #include "archive.h"
  34
  35 int
  36 archive_read_data_into_buffer(struct archive *a, void *d, ssize_t len)
  37 {
  38         char *dest;
  39         ssize_t bytes_read, total_bytes;
  40
  41         dest = (char *)d;
  42         total_bytes = 0;
  43         bytes_read = archive_read_data(a, dest, len);
  44         while (bytes_read > 0) {
  45                 total_bytes += bytes_read;
  46                 bytes_read = archive_read_data(a, dest + total_bytes,
  47                     len - total_bytes);
  48         }
  49         return (ARCHIVE_OK);
  50 }