2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2010, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * See files README, COPYING and CREDITS in the root of the source
23 * tree for related information and legal notices. It is expected
24 * that future projects/authors will amend these files as needed.
28 * w32io.c: POSIX I/O emulation layer for Windows
30 * Known contributors to this file:
31 * Ron Koenderink, 2007
32 * Markus Armbruster, 2007-2009
36 * POSIX sockets are file descriptors. Windows sockets are something
37 * else, with a separate set of functions to operate on them. To
38 * present a more POSIX-like interface to our application code, we
39 * provide a compatibility layer that wraps file descriptors around
52 int (*w32_close_function)(int) = _close;
53 int (*w32_read_function)(int, void *, unsigned) = _read;
54 int (*w32_write_function)(int, const void *, unsigned) = _write;
57 * POSIX equivalent for readv
58 * Modelled after the GNU's libc/sysdeps/posix/readv.c
61 readv(int fd, const struct iovec *iov, int iovcnt)
64 unsigned char *buffer, *buffer_location;
65 size_t total_bytes = 0;
69 for (i = 0; i < iovcnt; i++) {
70 total_bytes += iov[i].iov_len;
73 buffer = malloc(total_bytes);
74 if (buffer == NULL && total_bytes != 0) {
79 bytes_read = read(fd, buffer, total_bytes);
85 bytes_left = bytes_read;
86 buffer_location = buffer;
87 for (i = 0; i < iovcnt; i++) {
88 size_t copy = MIN(iov[i].iov_len, bytes_left);
90 memcpy(iov[i].iov_base, buffer_location, copy);
92 buffer_location += copy;
103 * POSIX equivalent for writev
104 * Modelled after the GNU's libc/sysdeps/posix/writev.c
107 writev(int fd, const struct iovec *iov, int iovcnt)
110 unsigned char *buffer, *buffer_location;
111 size_t total_bytes = 0;
114 for (i = 0; i < iovcnt; i++)
115 total_bytes += iov[i].iov_len;
117 buffer = malloc(total_bytes);
118 if (buffer == NULL && total_bytes != 0) {
123 buffer_location = buffer;
124 for (i = 0; i < iovcnt; i++) {
125 memcpy(buffer_location, iov[i].iov_base, iov[i].iov_len);
126 buffer_location += iov[i].iov_len;
129 bytes_written = write(fd, buffer, total_bytes);
131 return bytes_written;