| 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 * |
| 11 | * or (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 | /* This program uses two pipes to communicate with the |
| 25 | * GNU Go client. To an external client it appears to |
| 26 | * be a gtp engine. It accomplishes this by intercepting |
| 27 | * gtp commands and passing them on to GNU Go. |
| 28 | * |
| 29 | * This program in and of itself is not useful but it |
| 30 | * can be the basis of useful programs. Example: hack |
| 31 | * in gmp.c and get a gtp / gmp mediator. |
| 32 | * |
| 33 | * Pipe a: client --> gnugo |
| 34 | * Pipe b: gnugo --> client |
| 35 | */ |
| 36 | |
| 37 | #include <stdio.h> |
| 38 | #include <unistd.h> |
| 39 | #include <string.h> |
| 40 | |
| 41 | void error(const char *msg); |
| 42 | #define TELL_GNUGO(x) if (verbose) fprintf(stderr, "%s", x); \ |
| 43 | if (fprintf(to_gnugo_stream, "%s", x) < 0) \ |
| 44 | error ("can't write command in to_gnugo_stream"); \ |
| 45 | fflush(to_gnugo_stream); |
| 46 | #define ASK_GNUGO(x) if (!fgets(x, 128, from_gnugo_stream)) \ |
| 47 | error("can't get response"); |
| 48 | int |
| 49 | main() |
| 50 | { |
| 51 | int pfd_a[2]; |
| 52 | int pfd_b[2]; |
| 53 | char gnugo_line[128], client_line[128]; |
| 54 | int length = 0; |
| 55 | int verbose = 1; |
| 56 | FILE *to_gnugo_stream, *from_gnugo_stream; |
| 57 | |
| 58 | if (pipe(pfd_a) == -1) |
| 59 | error("can't open pipe a"); |
| 60 | if (pipe(pfd_b) == -1) |
| 61 | error("can't open pipe b"); |
| 62 | switch (fork()) { |
| 63 | case -1: |
| 64 | error("fork failed (try chopsticks)"); |
| 65 | case 0: |
| 66 | /* Attach pipe a to stdin */ |
| 67 | if (dup2(pfd_a[0], 0) == -1) |
| 68 | error("dup pfd_a[0] failed"); |
| 69 | /* attach pipe b to stdout" */ |
| 70 | if (dup2(pfd_b[1], 1) == -1) |
| 71 | error("dup pfd_b[1] failed"); |
| 72 | execlp("gnugo", "gnugo", "--mode", "gtp", "--quiet", NULL); |
| 73 | error("execlp failed"); |
| 74 | } |
| 75 | /* We use stderr to communicate with the client since stdout is needed. */ |
| 76 | /* Attach pipe a to to_gnugo_stream */ |
| 77 | to_gnugo_stream = fdopen(pfd_a[1], "w"); |
| 78 | /* Attach pipe b to from_gnugo_stream */ |
| 79 | from_gnugo_stream = fdopen(pfd_b[0], "r"); |
| 80 | |
| 81 | while (1) { |
| 82 | int length = 0; |
| 83 | if (!fgets(client_line, 128, stdin) |
| 84 | || !strncmp(client_line, "quit", 4)) { |
| 85 | TELL_GNUGO("quit\n"); |
| 86 | return 1; |
| 87 | } |
| 88 | if (!strncmp(client_line, "genmove_black", 13)) { |
| 89 | char *token; |
| 90 | const char delimiters[] = " \t\r\n"; |
| 91 | float value1, value2; |
| 92 | |
| 93 | TELL_GNUGO("top_moves_black\n"); |
| 94 | ASK_GNUGO(gnugo_line); |
| 95 | token = strtok(gnugo_line, delimiters); |
| 96 | token = strtok(NULL, delimiters); |
| 97 | TELL_GNUGO("black "); |
| 98 | TELL_GNUGO(token); |
| 99 | TELL_GNUGO("\n"); |
| 100 | ASK_GNUGO(gnugo_line); |
| 101 | while (length != 1) { |
| 102 | ASK_GNUGO(gnugo_line); |
| 103 | length = strlen(gnugo_line); |
| 104 | printf(gnugo_line); |
| 105 | fflush(stdout); |
| 106 | } |
| 107 | } |
| 108 | else { |
| 109 | TELL_GNUGO(client_line); |
| 110 | while (length != 1) { |
| 111 | ASK_GNUGO(gnugo_line); |
| 112 | length = strlen(gnugo_line); |
| 113 | printf(gnugo_line); |
| 114 | fflush(stdout); |
| 115 | } |
| 116 | } |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | void |
| 121 | error(const char *msg) |
| 122 | { |
| 123 | fprintf(stderr, "vanilla: %s\n", msg); |
| 124 | abort(); |
| 125 | } |
| 126 | |
| 127 | |
| 128 | |
| 129 | /* |
| 130 | * Local Variables: |
| 131 | * tab-width: 8 |
| 132 | * c-basic-offset: 2 |
| 133 | * End: |
| 134 | */ |