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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
* This is GNU Go, a Go program. Contact gnugo@gnu.org, or see *
* http://www.gnu.org/software/gnugo/ for more information. *
* *
* Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, *
* 2008 and 2009 by the Free Software Foundation. *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License as *
* published by the Free Software Foundation - version 3 or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License in file COPYING for more details. *
* *
* You should have received a copy of the GNU General Public *
* License along with this program; if not, write to the Free *
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, *
* Boston, MA 02111, USA. *
\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* Workaround M$ Windows C library deficiency: it cannot handle
* sockets as stdio streams. So we do this ourselves, more or less.
*
* Call winsocket_activate(...) with socket handle to use. After this
* fake stream NULL will work over the socket, while other streams
* will (hopefully) keep working as usual.
*/
#define WINSOCKET_H_INTERNAL_INCLUSION
#include "winsocket.h"
#if USE_WINDOWS_SOCKET_CLUDGE
#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <winsock.h>
static int socket_handle = 0;
static int socket_end_of_file = 0;
void
winsocket_activate(int _socket_handle)
{
assert(socket_handle == 0);
socket_handle = _socket_handle;
}
/* Miscellaneous functions. */
void
winsocket_setbuf(FILE *file, char *buffer)
{
if (file != NULL)
setbuf(file, buffer);
else
assert(socket_handle != 0);
}
int
winsocket_fflush(FILE *file)
{
if (file != NULL)
return fflush(file);
else {
assert(socket_handle != 0);
return 0;
}
}
int
winsocket_feof(FILE *file)
{
if (file != NULL)
return feof(file);
else {
assert(socket_handle != 0);
return socket_end_of_file;
}
}
int
winsocket_fclose(FILE *file)
{
if (file != NULL)
return fclose(file);
else {
assert(socket_handle != 0);
return 0;
}
}
/* Input functions. */
size_t
winsocket_fread(void *buffer, size_t size, size_t num_items, FILE *file)
{
if (file != NULL)
return fread(buffer, size, num_items, file);
else {
assert(socket_handle != 0);
if (recv(socket_handle, (char *) buffer, size * num_items, 0)
== size * num_items)
return num_items;
else {
socket_end_of_file = 1;
return EOF;
}
}
}
char *
winsocket_fgets(char *buffer, int size, FILE *file)
{
if (file != NULL)
return fgets(buffer, size, file);
else {
/* FIXME: Optimize if reading char-by-char is too slow. */
int stored_length;
for (stored_length = 0; stored_length < size - 1; stored_length) {
if (recv(socket_handle, buffer + stored_length, 1, 0) != 1) {
socket_end_of_file = 1;
break;
}
if (buffer[stored_length++] == '\n')
break;
}
if (stored_length == 0)
return NULL;
buffer[stored_length + 1] = 0;
return buffer;
}
}
/* Output functions. */
size_t
winsocket_fwrite(const void *buffer, size_t size, size_t num_items,
FILE *file)
{
if (file != NULL)
return fwrite(buffer, size, num_items, file);
else {
assert(socket_handle != 0);
return ((send(socket_handle, (const char *) buffer, size * num_items, 0)
== size * num_items)
? num_items : EOF);
}
}
int
winsocket_fputc(int character, FILE *file)
{
if (file != NULL)
return fputc(character, file);
else {
assert(socket_handle != 0);
return (send(socket_handle, (const char *) &character, 1, 0) == 1
? character : EOF);
}
}
int
winsocket_fputs(const char *string, FILE *file)
{
if (file != NULL)
return fputs(string, file);
else {
int length = strlen(string);
assert(socket_handle != 0);
return send(socket_handle, string, length, 0) == length ? length : EOF;
}
}
int
winsocket_fprintf(FILE *file, const char *format_string, ...)
{
va_list arguments;
int result;
va_start(arguments, format_string);
result = winsocket_vfprintf(file, format_string, arguments);
va_end(arguments);
return result;
}
int
winsocket_vfprintf(FILE *file, const char *format_string, va_list arguments)
{
if (file != NULL)
return vfprintf(file, format_string, arguments);
else {
char buffer[0x1000];
int length = _vsnprintf(buffer, sizeof buffer, format_string, arguments);
assert(socket_handle != 0);
return send(socket_handle, buffer, length, 0) == length ? length : -1;
}
}
#endif /* USE_WINDOWS_SOCKET_CLUDGE */
/*
* Local Variables:
* tab-width: 8
* c-basic-offset: 2
* End:
*/
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