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File indexing completed on 2025-05-11 08:24:15

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002 
0003 /**
0004  *  @file
0005  *
0006  *  @brief Read a Vector
0007  *  @ingroup libcsupport
0008  */
0009 
0010 /*
0011  *  COPYRIGHT (c) 1989-2011.
0012  *  On-Line Applications Research Corporation (OAR).
0013  *
0014  * Redistribution and use in source and binary forms, with or without
0015  * modification, are permitted provided that the following conditions
0016  * are met:
0017  * 1. Redistributions of source code must retain the above copyright
0018  *    notice, this list of conditions and the following disclaimer.
0019  * 2. Redistributions in binary form must reproduce the above copyright
0020  *    notice, this list of conditions and the following disclaimer in the
0021  *    documentation and/or other materials provided with the distribution.
0022  *
0023  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0024  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0025  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0026  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0027  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0028  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0029  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0030  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0031  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0032  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0033  * POSSIBILITY OF SUCH DAMAGE.
0034  */
0035 
0036 #ifdef HAVE_CONFIG_H
0037 #include "config.h"
0038 #endif
0039 
0040 #include <sys/uio.h>
0041 
0042 #include <rtems/libio_.h>
0043 
0044 static ssize_t readv_adapter(
0045   rtems_libio_t      *iop,
0046   const struct iovec *iov,
0047   int                 iovcnt,
0048   ssize_t             total
0049 )
0050 {
0051   return ( *iop->pathinfo.handlers->readv_h )( iop, iov, iovcnt, total );
0052 }
0053 
0054 /**
0055  *  readv() - POSIX 1003.1 - Read a Vector
0056  *
0057  *  OpenGroup URL:
0058  *
0059  *  http://www.opengroup.org/onlinepubs/009695399/functions/readv.html
0060  */
0061 ssize_t readv(
0062   int                 fd,
0063   const struct iovec *iov,
0064   int                 iovcnt
0065 )
0066 {
0067   return rtems_libio_iovec_eval(
0068     fd,
0069     iov,
0070     iovcnt,
0071     LIBIO_FLAGS_READ,
0072     readv_adapter
0073   );
0074 }