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/*
* Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <config.h>
#include "roken.h"
/*
* Like read but never return partial data.
*/
#ifndef _WIN32
ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL
net_read (rk_socket_t fd, void *buf, size_t nbytes)
{
char *cbuf = (char *)buf;
ssize_t count;
size_t rem = nbytes;
while (rem > 0) {
count = read (fd, cbuf, rem);
if (count < 0) {
if (errno == EINTR)
continue;
else
return count;
} else if (count == 0) {
return count;
}
cbuf += count;
rem -= count;
}
return nbytes;
}
#else
ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL
net_read(rk_socket_t sock, void *buf, size_t nbytes)
{
char *cbuf = (char *)buf;
ssize_t count;
size_t rem = nbytes;
#ifdef SOCKET_IS_NOT_AN_FD
int use_read = 0;
#endif
while (rem > 0) {
#ifdef SOCKET_IS_NOT_AN_FD
if (use_read)
count = _read (sock, cbuf, rem);
else
count = recv (sock, cbuf, rem, 0);
if (use_read == 0 &&
rk_IS_SOCKET_ERROR(count) &&
(rk_SOCK_ERRNO == WSANOTINITIALISED ||
rk_SOCK_ERRNO == WSAENOTSOCK)) {
use_read = 1;
count = _read (sock, cbuf, rem);
}
#else
count = recv (sock, cbuf, rem, 0);
#endif
if (count < 0) {
/* With WinSock, the error EINTR (WSAEINTR), is used to
indicate that a blocking call was cancelled using
WSACancelBlockingCall(). */
#ifndef HAVE_WINSOCK
if (rk_SOCK_ERRNO == EINTR)
continue;
#endif
return count;
} else if (count == 0) {
return count;
}
cbuf += count;
rem -= count;
}
return nbytes;
}
#endif
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