mirror of
https://github.com/curl/curl.git
synced 2024-12-09 06:30:06 +08:00
81 lines
1.7 KiB
C
81 lines
1.7 KiB
C
|
|
/* $Id$ */
|
|
|
|
/* Copyright 1998 by the Massachusetts Institute of Technology.
|
|
*
|
|
* Permission to use, copy, modify, and distribute this
|
|
* software and its documentation for any purpose and without
|
|
* fee is hereby granted, provided that the above copyright
|
|
* notice appear in all copies and that both that copyright
|
|
* notice and this permission notice appear in supporting
|
|
* documentation, and that the name of M.I.T. not be used in
|
|
* advertising or publicity pertaining to distribution of the
|
|
* software without specific, written prior permission.
|
|
* M.I.T. makes no representations about the suitability of
|
|
* this software for any purpose. It is provided "as is"
|
|
* without express or implied warranty.
|
|
*/
|
|
|
|
#include "ares_setup.h"
|
|
|
|
#ifdef HAVE_LIMITS_H
|
|
# include <limits.h>
|
|
#endif
|
|
|
|
#include "ares.h"
|
|
#include "ares_private.h"
|
|
|
|
#ifndef HAVE_WRITEV
|
|
ssize_t ares_writev(ares_socket_t s, const struct iovec *iov, int iovcnt)
|
|
{
|
|
char *buffer, *bp;
|
|
int i;
|
|
size_t bytes = 0;
|
|
ssize_t result;
|
|
|
|
/* Validate iovcnt */
|
|
if (iovcnt <= 0)
|
|
{
|
|
SET_ERRNO(EINVAL);
|
|
return (-1);
|
|
}
|
|
|
|
/* Validate and find the sum of the iov_len values in the iov array */
|
|
for (i = 0; i < iovcnt; i++)
|
|
{
|
|
if (iov[i].iov_len > INT_MAX - bytes)
|
|
{
|
|
SET_ERRNO(EINVAL);
|
|
return (-1);
|
|
}
|
|
bytes += iov[i].iov_len;
|
|
}
|
|
|
|
if (bytes == 0)
|
|
return (0);
|
|
|
|
/* Allocate a temporary buffer to hold the data */
|
|
buffer = malloc(bytes);
|
|
if (!buffer)
|
|
{
|
|
SET_ERRNO(ENOMEM);
|
|
return (-1);
|
|
}
|
|
|
|
/* Copy the data into buffer */
|
|
for (bp = buffer, i = 0; i < iovcnt; ++i)
|
|
{
|
|
memcpy (bp, iov[i].iov_base, iov[i].iov_len);
|
|
bp += iov[i].iov_len;
|
|
}
|
|
|
|
/* Send buffer contents */
|
|
result = swrite(s, buffer, bytes);
|
|
|
|
free(buffer);
|
|
|
|
return (result);
|
|
}
|
|
#endif
|
|
|