| 1 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\ |
| 2 | * This is GNU Go, a Go program. Contact gnugo@gnu.org, or see * |
| 3 | * http://www.gnu.org/software/gnugo/ for more information. * |
| 4 | * * |
| 5 | * Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, * |
| 6 | * 2008 and 2009 by the Free Software Foundation. * |
| 7 | * * |
| 8 | * This program is free software; you can redistribute it and/or * |
| 9 | * modify it under the terms of the GNU General Public License as * |
| 10 | * published by the Free Software Foundation - version 3 or * |
| 11 | * (at your option) any later version. * |
| 12 | * * |
| 13 | * This program is distributed in the hope that it will be useful, * |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
| 16 | * GNU General Public License in file COPYING for more details. * |
| 17 | * * |
| 18 | * You should have received a copy of the GNU General Public * |
| 19 | * License along with this program; if not, write to the Free * |
| 20 | * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * |
| 21 | * Boston, MA 02111, USA. * |
| 22 | \* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ |
| 23 | |
| 24 | /* Workaround M$ Windows C library deficiency: it cannot handle |
| 25 | * sockets as stdio streams. So we do this ourselves, more or less. |
| 26 | * |
| 27 | * Call winsocket_activate(...) with socket handle to use. After this |
| 28 | * fake stream NULL will work over the socket, while other streams |
| 29 | * will (hopefully) keep working as usual. |
| 30 | */ |
| 31 | |
| 32 | #define WINSOCKET_H_INTERNAL_INCLUSION |
| 33 | |
| 34 | #include "winsocket.h" |
| 35 | |
| 36 | |
| 37 | #if USE_WINDOWS_SOCKET_CLUDGE |
| 38 | |
| 39 | |
| 40 | #include <assert.h> |
| 41 | #include <stdarg.h> |
| 42 | #include <stdio.h> |
| 43 | #include <string.h> |
| 44 | |
| 45 | #include <winsock.h> |
| 46 | |
| 47 | |
| 48 | static int socket_handle = 0; |
| 49 | static int socket_end_of_file = 0; |
| 50 | |
| 51 | |
| 52 | void |
| 53 | winsocket_activate(int _socket_handle) |
| 54 | { |
| 55 | assert(socket_handle == 0); |
| 56 | socket_handle = _socket_handle; |
| 57 | } |
| 58 | |
| 59 | |
| 60 | /* Miscellaneous functions. */ |
| 61 | |
| 62 | void |
| 63 | winsocket_setbuf(FILE *file, char *buffer) |
| 64 | { |
| 65 | if (file != NULL) |
| 66 | setbuf(file, buffer); |
| 67 | else |
| 68 | assert(socket_handle != 0); |
| 69 | } |
| 70 | |
| 71 | |
| 72 | int |
| 73 | winsocket_fflush(FILE *file) |
| 74 | { |
| 75 | if (file != NULL) |
| 76 | return fflush(file); |
| 77 | else { |
| 78 | assert(socket_handle != 0); |
| 79 | return 0; |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | |
| 84 | int |
| 85 | winsocket_feof(FILE *file) |
| 86 | { |
| 87 | if (file != NULL) |
| 88 | return feof(file); |
| 89 | else { |
| 90 | assert(socket_handle != 0); |
| 91 | return socket_end_of_file; |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | |
| 96 | int |
| 97 | winsocket_fclose(FILE *file) |
| 98 | { |
| 99 | if (file != NULL) |
| 100 | return fclose(file); |
| 101 | else { |
| 102 | assert(socket_handle != 0); |
| 103 | return 0; |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | |
| 108 | /* Input functions. */ |
| 109 | |
| 110 | size_t |
| 111 | winsocket_fread(void *buffer, size_t size, size_t num_items, FILE *file) |
| 112 | { |
| 113 | if (file != NULL) |
| 114 | return fread(buffer, size, num_items, file); |
| 115 | else { |
| 116 | assert(socket_handle != 0); |
| 117 | if (recv(socket_handle, (char *) buffer, size * num_items, 0) |
| 118 | == size * num_items) |
| 119 | return num_items; |
| 120 | else { |
| 121 | socket_end_of_file = 1; |
| 122 | return EOF; |
| 123 | } |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | |
| 128 | char * |
| 129 | winsocket_fgets(char *buffer, int size, FILE *file) |
| 130 | { |
| 131 | if (file != NULL) |
| 132 | return fgets(buffer, size, file); |
| 133 | else { |
| 134 | /* FIXME: Optimize if reading char-by-char is too slow. */ |
| 135 | int stored_length; |
| 136 | |
| 137 | for (stored_length = 0; stored_length < size - 1; stored_length) { |
| 138 | if (recv(socket_handle, buffer + stored_length, 1, 0) != 1) { |
| 139 | socket_end_of_file = 1; |
| 140 | break; |
| 141 | } |
| 142 | |
| 143 | if (buffer[stored_length++] == '\n') |
| 144 | break; |
| 145 | } |
| 146 | |
| 147 | if (stored_length == 0) |
| 148 | return NULL; |
| 149 | |
| 150 | buffer[stored_length + 1] = 0; |
| 151 | return buffer; |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | |
| 156 | /* Output functions. */ |
| 157 | |
| 158 | size_t |
| 159 | winsocket_fwrite(const void *buffer, size_t size, size_t num_items, |
| 160 | FILE *file) |
| 161 | { |
| 162 | if (file != NULL) |
| 163 | return fwrite(buffer, size, num_items, file); |
| 164 | else { |
| 165 | assert(socket_handle != 0); |
| 166 | return ((send(socket_handle, (const char *) buffer, size * num_items, 0) |
| 167 | == size * num_items) |
| 168 | ? num_items : EOF); |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | |
| 173 | int |
| 174 | winsocket_fputc(int character, FILE *file) |
| 175 | { |
| 176 | if (file != NULL) |
| 177 | return fputc(character, file); |
| 178 | else { |
| 179 | assert(socket_handle != 0); |
| 180 | return (send(socket_handle, (const char *) &character, 1, 0) == 1 |
| 181 | ? character : EOF); |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | |
| 186 | int |
| 187 | winsocket_fputs(const char *string, FILE *file) |
| 188 | { |
| 189 | if (file != NULL) |
| 190 | return fputs(string, file); |
| 191 | else { |
| 192 | int length = strlen(string); |
| 193 | |
| 194 | assert(socket_handle != 0); |
| 195 | return send(socket_handle, string, length, 0) == length ? length : EOF; |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | |
| 200 | int |
| 201 | winsocket_fprintf(FILE *file, const char *format_string, ...) |
| 202 | { |
| 203 | va_list arguments; |
| 204 | int result; |
| 205 | |
| 206 | va_start(arguments, format_string); |
| 207 | result = winsocket_vfprintf(file, format_string, arguments); |
| 208 | va_end(arguments); |
| 209 | |
| 210 | return result; |
| 211 | } |
| 212 | |
| 213 | |
| 214 | int |
| 215 | winsocket_vfprintf(FILE *file, const char *format_string, va_list arguments) |
| 216 | { |
| 217 | if (file != NULL) |
| 218 | return vfprintf(file, format_string, arguments); |
| 219 | else { |
| 220 | char buffer[0x1000]; |
| 221 | int length = _vsnprintf(buffer, sizeof buffer, format_string, arguments); |
| 222 | |
| 223 | assert(socket_handle != 0); |
| 224 | return send(socket_handle, buffer, length, 0) == length ? length : -1; |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | |
| 229 | #endif /* USE_WINDOWS_SOCKET_CLUDGE */ |
| 230 | |
| 231 | |
| 232 | /* |
| 233 | * Local Variables: |
| 234 | * tab-width: 8 |
| 235 | * c-basic-offset: 2 |
| 236 | * End: |
| 237 | */ |