project_files/frontlib/ipc/gameconn.c
author Wuzzy <Wuzzy2@mail.ru>
Fri, 17 May 2019 16:54:30 +0200
changeset 15013 b35a036d6b97
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permissions -rw-r--r--
Disable VIDEOREC if trying to build it with BUILD_ENGINE_C in release builds
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/*
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 * Hedgewars, a free turn based strategy game
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 * Copyright (C) 2012 Simeon Maxein <smaxein@googlemail.com>
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 *
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 * This program is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU General Public License
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 * as published by the Free Software Foundation; either version 2
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 * of the License, or (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
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 */
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#include "gameconn.h"
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#include "ipcbase.h"
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#include "ipcprotocol.h"
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#include "../util/logging.h"
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#include "../util/util.h"
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#include "../hwconsts.h"
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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typedef enum {
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    AWAIT_CONNECTION,
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    CONNECTED,
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    FINISHED
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} gameconn_state;
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struct _flib_gameconn {
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    flib_ipcbase *ipcBase;
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    flib_vector *configBuffer;
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    flib_vector *demoBuffer;
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    char *playerName;
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    gameconn_state state;
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    bool netgame;
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    int disconnectReason;
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    void (*onConnectCb)(void* context);
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    void *onConnectCtx;
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    void (*onDisconnectCb)(void* context, int reason);
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    void *onDisconnectCtx;
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    void (*onErrorMessageCb)(void* context, const char *msg);
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    void *onErrorMessageCtx;
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    void (*onChatCb)(void* context, const char *msg, bool teamchat);
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    void *onChatCtx;
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    void (*onGameRecordedCb)(void *context, const uint8_t *record, size_t size, bool isSavegame);
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    void *onGameRecordedCtx;
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    void (*onEngineMessageCb)(void *context, const uint8_t *em, size_t size);
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    void *onEngineMessageCtx;
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    bool running;
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    bool destroyRequested;
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};
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static void defaultCallback_onErrorMessage(void* context, const char *msg) {
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    flib_log_w("Error from engine (no callback set): %s", msg);
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}
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static void clearCallbacks(flib_gameconn *conn) {
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    flib_gameconn_onConnect(conn, NULL, NULL);
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    flib_gameconn_onDisconnect(conn, NULL, NULL);
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    flib_gameconn_onErrorMessage(conn, NULL, NULL);
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    flib_gameconn_onChat(conn, NULL, NULL);
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    flib_gameconn_onGameRecorded(conn, NULL, NULL);
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    flib_gameconn_onEngineMessage(conn, NULL, NULL);
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}
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static flib_gameconn *flib_gameconn_create_partial(bool record, const char *playerName, bool netGame) {
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    flib_gameconn *result = NULL;
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    flib_gameconn *tempConn = flib_calloc(1, sizeof(flib_gameconn));
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    if(tempConn) {
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        tempConn->ipcBase = flib_ipcbase_create();
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        tempConn->configBuffer = flib_vector_create();
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        tempConn->playerName = flib_strdupnull(playerName);
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        if(tempConn->ipcBase && tempConn->configBuffer && tempConn->playerName) {
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            if(record) {
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                tempConn->demoBuffer = flib_vector_create();
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            }
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            tempConn->state = AWAIT_CONNECTION;
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            tempConn->netgame = netGame;
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            tempConn->disconnectReason = GAME_END_ERROR;
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            clearCallbacks(tempConn);
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            result = tempConn;
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            tempConn = NULL;
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        }
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    }
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    flib_gameconn_destroy(tempConn);
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    return result;
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}
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flib_gameconn *flib_gameconn_create(const char *playerName, const flib_gamesetup *setup, bool netgame) {
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    if(log_badargs_if2(playerName==NULL, setup==NULL)) {
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        return NULL;
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    }
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    flib_gameconn *result = NULL;
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    flib_gameconn *tempConn = flib_gameconn_create_partial(true, playerName, netgame);
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    if(tempConn) {
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        if(flib_ipc_append_fullconfig(tempConn->configBuffer, setup, netgame)) {
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            flib_log_e("Error generating full game configuration for the engine.");
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        } else {
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            result = tempConn;
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            tempConn = NULL;
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        }
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    }
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    flib_gameconn_destroy(tempConn);
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    return result;
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}
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flib_gameconn *flib_gameconn_create_playdemo(const uint8_t *demoFileContent, size_t size) {
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    if(log_badargs_if(demoFileContent==NULL && size>0)) {
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        return NULL;
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    }
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    flib_gameconn *result = NULL;
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    flib_gameconn *tempConn = flib_gameconn_create_partial(false, "Player", false);
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    if(tempConn) {
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        if(!flib_vector_append(tempConn->configBuffer, demoFileContent, size)) {
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            result = tempConn;
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            tempConn = NULL;
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        }
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    }
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    flib_gameconn_destroy(tempConn);
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    return result;
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}
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flib_gameconn *flib_gameconn_create_loadgame(const char *playerName, const uint8_t *saveFileContent, size_t size) {
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    if(log_badargs_if(saveFileContent==NULL && size>0)) {
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        return NULL;
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    }
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    flib_gameconn *result = NULL;
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    flib_gameconn *tempConn = flib_gameconn_create_partial(true, playerName, false);
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    if(tempConn) {
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        if(!flib_vector_append(tempConn->configBuffer, saveFileContent, size)) {
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            result = tempConn;
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            tempConn = NULL;
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        }
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    }
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    flib_gameconn_destroy(tempConn);
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    return result;
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}
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flib_gameconn *flib_gameconn_create_campaign(const char *playerName, const char *seed, const char *script) {
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    if(log_badargs_if3(playerName==NULL, seed==NULL, script==NULL)) {
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        return NULL;
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    }
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    flib_gameconn *result = NULL;
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    flib_gameconn *tempConn = flib_gameconn_create_partial(true, playerName, false);
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    if(tempConn) {
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        if(!flib_ipc_append_message(tempConn->configBuffer, "TL")
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                && !flib_ipc_append_seed(tempConn->configBuffer, seed)
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                && !flib_ipc_append_script(tempConn->configBuffer, script)
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                && !flib_ipc_append_message(tempConn->configBuffer, "!")) {
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            result = tempConn;
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            tempConn = NULL;
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        }
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    }
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    flib_gameconn_destroy(tempConn);
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    return result;
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}
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void flib_gameconn_destroy(flib_gameconn *conn) {
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    if(conn) {
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        if(conn->running) {
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            /*
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             * The function was called from a callback, so the tick function is still running
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             * and we delay the actual destruction. We ensure no further callbacks will be
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             * sent to prevent surprises.
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             */
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            clearCallbacks(conn);
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            conn->destroyRequested = true;
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        } else {
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            flib_ipcbase_destroy(conn->ipcBase);
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            flib_vector_destroy(conn->configBuffer);
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            flib_vector_destroy(conn->demoBuffer);
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            free(conn->playerName);
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            free(conn);
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        }
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    }
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}
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int flib_gameconn_getport(flib_gameconn *conn) {
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    if(log_badargs_if(conn==NULL)) {
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        return 0;
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    }
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    return flib_ipcbase_port(conn->ipcBase);
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}
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static void demo_append(flib_gameconn *conn, const void *data, size_t len) {
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    if(conn->demoBuffer) {
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        if(flib_vector_append(conn->demoBuffer, data, len)) {
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            flib_log_e("Error recording demo: Out of memory.");
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            flib_vector_destroy(conn->demoBuffer);
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            conn->demoBuffer = NULL;
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        }
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    }
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}
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static int format_chatmessage(uint8_t buffer[257], const char *playerName, const char *message) {
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    size_t msglen = strlen(message);
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    // If the message starts with /me, it will be displayed differently.
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    bool meMessage = msglen >= 4 && !memcmp(message, "/me ", 4);
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    const char *template = meMessage ? "s\x02* %s %s  " : "s\x01%s: %s  ";
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    int size = snprintf((char*)buffer+1, 256, template, playerName, meMessage ? message+4 : message);
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    if(log_e_if(size<=0, "printf error")) {
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        return -1;
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    } else {
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        buffer[0] = size>255 ? 255 : size;
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        return 0;
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    }
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}
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static void demo_append_chatmessage(flib_gameconn *conn, const char *message) {
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    // Chat messages are reformatted to make them look as if they were received, not sent.
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    uint8_t converted[257];
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    if(!format_chatmessage(converted, conn->playerName, message)) {
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        demo_append(conn, converted, converted[0]+1);
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    }
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}
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static void demo_replace_gamemode(flib_buffer buf, char gamemode) {
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    size_t msgStart = 0;
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    uint8_t *data = (uint8_t*)buf.data;
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    while(msgStart+2 < buf.size) {
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        if(!memcmp(data+msgStart, "\x02T", 2)) {
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            data[msgStart+2] = gamemode;
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        }
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        msgStart += (uint8_t)data[msgStart]+1;
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    }
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}
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int flib_gameconn_send_enginemsg(flib_gameconn *conn, const uint8_t *data, size_t len) {
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    if(log_badargs_if2(conn==NULL, data==NULL && len>0)) {
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        return -1;
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    }
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    int result = flib_ipcbase_send_raw(conn->ipcBase, data, len);
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    if(!result) {
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        demo_append(conn, data, len);
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    }
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    return result;
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}
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int flib_gameconn_send_textmsg(flib_gameconn *conn, int msgtype, const char *msg) {
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    if(log_badargs_if2(conn==NULL, msg==NULL)) {
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        return -1;
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    }
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    int result = -1;
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    uint8_t converted[257];
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    int size = snprintf((char*)converted+1, 256, "s%c%s", (char)msgtype, msg);
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    if(size>0) {
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        converted[0] = size>255 ? 255 : size;
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        if(!flib_ipcbase_send_raw(conn->ipcBase, converted, converted[0]+1)) {
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            demo_append(conn, converted, converted[0]+1);
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            result = 0;
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        }
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    }
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    return result;
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}
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int flib_gameconn_send_chatmsg(flib_gameconn *conn, const char *playername, const char *msg) {
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    if(log_badargs_if3(conn==NULL, playername==NULL, msg==NULL)) {
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        return -1;
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    }
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    uint8_t converted[257];
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    if(!format_chatmessage(converted, playername, msg)
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            && !flib_ipcbase_send_raw(conn->ipcBase, converted, converted[0]+1)) {
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        demo_append(conn, converted, converted[0]+1);
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        return 0;
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    }
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    return -1;
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}
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   284
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int flib_gameconn_send_quit(flib_gameconn *conn) {
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    return flib_gameconn_send_cmd(conn, "efinish");
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}
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int flib_gameconn_send_cmd(flib_gameconn *conn, const char *cmdString) {
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    if(log_badargs_if2(conn==NULL, cmdString==NULL)) {
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        return -1;
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    }
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    int result = -1;
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    uint8_t converted[256];
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    size_t msglen = strlen(cmdString);
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    if(!log_e_if(msglen>255, "Message too long: %s", cmdString)) {
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        strcpy((char*)converted+1, cmdString);
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        converted[0] = msglen;
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        if(!flib_ipcbase_send_raw(conn->ipcBase, converted, msglen+1)) {
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            demo_append(conn, converted, msglen+1);
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            result = 0;
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        }
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    }
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    return result;
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   305
}
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/**
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 * This macro generates a callback setter function. It uses the name of the callback to
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 * automatically generate the function name and the fields to set, so a consistent naming
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 * convention needs to be enforced (not that that is a bad thing). If null is passed as
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 * callback to the generated function, the defaultCb will be set instead (with conn
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 * as the context).
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 */
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#define GENERATE_CB_SETTER(cbName, cbParameterTypes, defaultCb) \
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    void flib_gameconn_##cbName(flib_gameconn *conn, void (*callback)cbParameterTypes, void *context) { \
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        if(!log_badargs_if(conn==NULL)) { \
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            conn->cbName##Cb = callback ? callback : &defaultCb; \
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            conn->cbName##Ctx = callback ? context : conn; \
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        } \
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    }
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   321
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/**
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 * Generate a callback setter function like GENERATE_CB_SETTER, and automatically generate a
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 * no-op callback function as well that is used as default.
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 */
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#define GENERATE_CB_SETTER_AND_DEFAULT(cbName, cbParameterTypes) \
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    static void _noop_callback_##cbName cbParameterTypes {} \
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    GENERATE_CB_SETTER(cbName, cbParameterTypes, _noop_callback_##cbName)
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   329
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GENERATE_CB_SETTER_AND_DEFAULT(onConnect, (void *context));
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GENERATE_CB_SETTER_AND_DEFAULT(onDisconnect, (void* context, int reason));
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GENERATE_CB_SETTER(onErrorMessage, (void* context, const char *msg), defaultCallback_onErrorMessage);
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GENERATE_CB_SETTER_AND_DEFAULT(onChat, (void* context, const char *msg, bool teamchat));
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GENERATE_CB_SETTER_AND_DEFAULT(onGameRecorded, (void *context, const uint8_t *record, size_t size, bool isSavegame));
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GENERATE_CB_SETTER_AND_DEFAULT(onEngineMessage, (void *context, const uint8_t *em, size_t size));
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#undef GENERATE_CB_SETTER_AND_DEFAULT
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#undef GENERATE_CB_SETTER
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   339
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static void flib_gameconn_wrappedtick(flib_gameconn *conn) {
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    if(conn->state == AWAIT_CONNECTION) {
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   342
        flib_ipcbase_accept(conn->ipcBase);
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        switch(flib_ipcbase_state(conn->ipcBase)) {
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   344
        case IPC_CONNECTED:
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            {
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                flib_constbuffer configBuffer = flib_vector_as_constbuffer(conn->configBuffer);
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                if(flib_ipcbase_send_raw(conn->ipcBase, configBuffer.data, configBuffer.size)) {
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                    conn->state = FINISHED;
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                    conn->onDisconnectCb(conn->onDisconnectCtx, GAME_END_ERROR);
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                    return;
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   351
                } else {
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   352
                    demo_append(conn, configBuffer.data, configBuffer.size);
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   353
                    conn->state = CONNECTED;
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   354
                    conn->onConnectCb(conn->onConnectCtx);
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   355
                    if(conn->destroyRequested) {
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   356
                        return;
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   357
                    }
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   358
                }
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            }
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            break;
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   361
        case IPC_NOT_CONNECTED:
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            conn->state = FINISHED;
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            conn->onDisconnectCb(conn->onDisconnectCtx, GAME_END_ERROR);
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            return;
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   365
        default:
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            break;
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   367
        }
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    }
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   369
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   370
    if(conn->state == CONNECTED) {
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   371
        uint8_t msgbuffer[257];
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   372
        int len;
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        while(!conn->destroyRequested && (len = flib_ipcbase_recv_message(conn->ipcBase, msgbuffer))>=0) {
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            if(len<2) {
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                flib_log_w("Received short message from IPC (<2 bytes)");
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                continue;
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   377
            }
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   378
            switch(msgbuffer[1]) {
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   379
            case '?':   // Ping
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   380
                // The pong is already part of the config message
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   381
                break;
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   382
            case 'C':   // Config query
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   383
                // And we already send the config message on connecting.
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   384
                break;
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   385
            case 'E':   // Error message
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   386
                if(len>=3) {
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   387
                    msgbuffer[len-2] = 0;
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   388
                    conn->onErrorMessageCb(conn->onErrorMessageCtx, (char*)msgbuffer+2);
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   389
                }
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   390
                break;
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   391
            case 'i':   // Statistics
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   392
                // TODO stats
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   393
                break;
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   394
            case 'Q':   // Game interrupted
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   395
            case 'H':   // Game halted
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   396
            case 'q':   // game finished
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   397
                {
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   398
                    int reason = msgbuffer[1]=='Q' ? GAME_END_INTERRUPTED : msgbuffer[1]=='H' ? GAME_END_HALTED : GAME_END_FINISHED;
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   399
                    conn->disconnectReason = reason;
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   400
                    bool savegame = (reason != GAME_END_FINISHED) && !conn->netgame;
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   401
                    if(conn->demoBuffer) {
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   402
                        flib_buffer demoBuffer = flib_vector_as_buffer(conn->demoBuffer);
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   403
                        demo_replace_gamemode(demoBuffer, savegame ? 'S' : 'D');
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   404
                        conn->onGameRecordedCb(conn->onGameRecordedCtx, demoBuffer.data, demoBuffer.size, savegame);
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   405
                        if(conn->destroyRequested) {
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   406
                            return;
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diff changeset
   407
                        }
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diff changeset
   408
                    }
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diff changeset
   409
                    return;
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diff changeset
   410
                }
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   411
            case 's':   // Chat message
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diff changeset
   412
                if(len>=3) {
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   413
                    msgbuffer[len-2] = 0;
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   414
                    demo_append_chatmessage(conn, (char*)msgbuffer+2);
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diff changeset
   415
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   416
                    conn->onChatCb(conn->onChatCtx, (char*)msgbuffer+2, false);
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diff changeset
   417
                }
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diff changeset
   418
                break;
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   419
            case 'b':   // Teamchat message
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diff changeset
   420
                if(len>=3) {
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diff changeset
   421
                    msgbuffer[len-2] = 0;
de822cd3df3a fixwhitespace and dos2unix
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diff changeset
   422
                    conn->onChatCb(conn->onChatCtx, (char*)msgbuffer+2, true);
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diff changeset
   423
                }
de822cd3df3a fixwhitespace and dos2unix
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diff changeset
   424
                break;
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diff changeset
   425
            default:    // Engine message
de822cd3df3a fixwhitespace and dos2unix
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   426
                demo_append(conn, msgbuffer, len);
de822cd3df3a fixwhitespace and dos2unix
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diff changeset
   427
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diff changeset
   428
                conn->onEngineMessageCb(conn->onEngineMessageCtx, msgbuffer, len);
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diff changeset
   429
                break;
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diff changeset
   430
            }
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diff changeset
   431
        }
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diff changeset
   432
    }
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diff changeset
   433
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diff changeset
   434
    if(flib_ipcbase_state(conn->ipcBase) == IPC_NOT_CONNECTED) {
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   435
        conn->state = FINISHED;
de822cd3df3a fixwhitespace and dos2unix
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diff changeset
   436
        conn->onDisconnectCb(conn->onDisconnectCtx, conn->disconnectReason);
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diff changeset
   437
    }
de822cd3df3a fixwhitespace and dos2unix
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diff changeset
   438
}
de822cd3df3a fixwhitespace and dos2unix
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diff changeset
   439
de822cd3df3a fixwhitespace and dos2unix
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diff changeset
   440
void flib_gameconn_tick(flib_gameconn *conn) {
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   441
    if(!log_badargs_if(conn == NULL)
de822cd3df3a fixwhitespace and dos2unix
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   442
            && !log_w_if(conn->running, "Call to flib_gameconn_tick from a callback")
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diff changeset
   443
            && !log_w_if(conn->state == FINISHED, "We are already done.")) {
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diff changeset
   444
        conn->running = true;
de822cd3df3a fixwhitespace and dos2unix
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diff changeset
   445
        flib_gameconn_wrappedtick(conn);
de822cd3df3a fixwhitespace and dos2unix
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diff changeset
   446
        conn->running = false;
de822cd3df3a fixwhitespace and dos2unix
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diff changeset
   447
de822cd3df3a fixwhitespace and dos2unix
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diff changeset
   448
        if(conn->destroyRequested) {
de822cd3df3a fixwhitespace and dos2unix
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diff changeset
   449
            flib_gameconn_destroy(conn);
de822cd3df3a fixwhitespace and dos2unix
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diff changeset
   450
        }
de822cd3df3a fixwhitespace and dos2unix
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diff changeset
   451
    }
de822cd3df3a fixwhitespace and dos2unix
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diff changeset
   452
}