sse client to listen commands (from mapedit)

game/globals.h

@@ -39,7 +39,7 @@
 #define E_MENU_SELECT 36
 #define E_CLOSE_MAP 37
 #define E_CLOSE_GEN 38
-#define E_HACKER 39
+#define E_EXTERNAL_MSG 40 //external message arrived from sse_listener
 
 //side flags
 

game/skeldal.c

@@ -280,6 +280,10 @@ INIS sinit[]=
 int last_ms_cursor=-1;
 int vmode=2;
 
+#include <platform/sse_receiver.h>
+
+static SSE_RECEIVER *sse_receiver = NULL;
+static MTQUEUE *mtqueue = NULL;
 
 void purge_temps(char _) {
     temp_storage_clear();
@@ -741,7 +745,8 @@ void done_skeldal(void)
         cur_config = NULL;
     }
   kill_timer();
-
+  if (sse_receiver) sse_receiver_stop(sse_receiver);
+  if (mtqueue) mtqueue_destroy(mtqueue);
   }
 
 
@@ -980,6 +985,38 @@ void show_loading_picture(char *filename)
   ablock_free(p);
   }
 
+void sse_listener_watch(EVENT_MSG *msg, void **userdata) {
+    if (msg->msg == E_WATCH) {
+        char *s = mtqueue_pop(mtqueue);
+        if (s) {
+            send_message(E_EXTERNAL_MSG, s);
+            free(s);
+        }
+    }
+}
+void sse_listener_init(const char *hostport) {
+
+    char *host = local_strdup(hostport);
+    char *port = strrchr(host,':');
+    if (port == NULL) {
+        port = local_strdup("80");
+    } else {
+        *port = 0;
+        ++port;
+    }
+
+    MTQUEUE *q = mtqueue_create();
+    SSE_RECEIVER *rcv = sse_receiver_install(q, host, port);
+
+    if (rcv == NULL) {
+        mtqueue_destroy(q);
+        return;
+    }
+    mtqueue = q;
+    sse_receiver = rcv;
+    send_message(E_ADD, E_WATCH, sse_listener_watch);
+
+}
 
 void init_skeldal(const INI_CONFIG *cfg)
   {
@@ -989,10 +1026,11 @@ void init_skeldal(const INI_CONFIG *cfg)
 
   cti_texty();
   timer_tree.next=NULL;
-  init_events();  
+  init_events();
 
   steam_init();
 
+
   char verr = game_display_init(ini_section_open(cfg, "video"), "Skeldal");
   if (!verr)
      {
@@ -1120,15 +1158,21 @@ char doNotLoadMapState=0;
 static int reload_map_handler(EVENT_MSG *msg,void **usr)
 {
 extern char running_battle;
-  if (msg->msg==E_RELOADMAP)
+  if (msg->msg==E_EXTERNAL_MSG)
   {
-	int i;
+    const char *m = va_arg(msg->data, const char *);
-	ReloadMapInfo *minfo=va_arg(msg->data, ReloadMapInfo *);
+    char fname[13];
-	const char *fname=minfo->fname;
+    int sector;
-	int sektor=minfo->sektor;
+    int i;
-	strcopy_n(loadlevel.name,fname,sizeof(loadlevel.name));
+
-	loadlevel.start_pos=sektor;
+    if (sscanf(m, "RELOAD %12s %d", fname, &sector) != 2) return 0;
-    for(i=0;i<POCET_POSTAV;i++)postavy[i].sektor=loadlevel.start_pos;
+
+    strcopy_n(loadlevel.name,fname,sizeof(loadlevel.name));
+	loadlevel.start_pos=sector;
+    for(i=0;i<POCET_POSTAV;i++) {
+        postavy[i].sektor=loadlevel.start_pos;
+        postavy[i].groupnum = 1;
+    }
     SEND_LOG("(WIZARD) Load map '%s' %d",loadlevel.name,loadlevel.start_pos);
     unwire_proc();
     if (battle) konec_kola();
@@ -1751,6 +1795,10 @@ int skeldal_entry_point(const SKELDAL_CONFIG *start_cfg)
     enable_achievements(1);
   }
 
+  if (start_cfg->sse_hostport) {
+      sse_listener_init(start_cfg->sse_hostport);
+  }
+
   start_check();
   purge_temps(1);
   clrscr();

game/skeldal.h

@@ -13,6 +13,7 @@ typedef struct {
     const char *config_path;
     const char *lang_path;
 
+    const char *sse_hostport;
 
 } SKELDAL_CONFIG;
 

platform/CMakeLists.txt

@@ -12,17 +12,19 @@ target_sources(skeldal_platform PRIVATE
     timer.cpp
     getopt.c
     achievements.cpp
+    mtqueue.cpp
+    sse_receiver.cpp
 )
 
-set(all_libs 
+set(all_libs
-    skeldal_main 
+    skeldal_main
-    skeldal_libs 
+    skeldal_libs
     skeldal_platform
     skeldal_sdl
     skeldal_libs
      ${SDL2_LIBRARIES}
      ${STANDARD_LIBRARIES})
-     
+
 if(WIN32)
     target_sources(skeldal_platform PRIVATE
         windows/save_folder.cpp
@@ -35,7 +37,7 @@ if(WIN32)
         windows/skeldal.rc
     )
     target_compile_definitions(skeldal_platform PRIVATE PLATFORM_WINDOWS)
-    if(STEAM_ENABLED) 
+    if(STEAM_ENABLED)
         if(CMAKE_SIZEOF_VOID_P EQUAL 8)
             # 64-bit
             set(STEAMLIB ${STEAMWORKS_SDK_DIR}/redistributable_bin/win64/steam_api64.lib)
@@ -49,7 +51,7 @@ if(WIN32)
         set(STEAMLIB "")
         set(STEAMDLL "")
     endif()
-    
+
     target_link_libraries(skeldal ${all_libs} ${STEAMLIB})
 
     if(STEAMDLL)
@@ -69,7 +71,7 @@ elseif(UNIX AND NOT APPLE)
         linux/app_start.cpp
     )
     target_compile_definitions(skeldal_bin PRIVATE PLATFORM_LINUX)
-    if(STEAM_ENABLED) 
+    if(STEAM_ENABLED)
         if(CMAKE_SIZEOF_VOID_P EQUAL 8)
             # 64-bit
             set(STEAMLIB ${STEAMWORKS_SDK_DIR}/redistributable_bin/linux64/libsteam_api.so)
@@ -83,10 +85,10 @@ elseif(UNIX AND NOT APPLE)
         COMMAND ${CMAKE_COMMAND} -E copy
                 ${CMAKE_CURRENT_LIST_DIR}/linux/skeldal.sh
                 ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/skeldal.sh)
-    target_link_libraries(skeldal_bin ${all_libs} ${STEAMLIB})    
+    target_link_libraries(skeldal_bin ${all_libs} ${STEAMLIB})
     message(STATUS "Building for Linux")
 
-elseif(APPLE)   
+elseif(APPLE)
     target_sources(skeldal_platform PRIVATE
         mac_os/save_folder.cpp
     )
@@ -96,10 +98,10 @@ elseif(APPLE)
     )
     target_compile_definitions(mylib PRIVATE PLATFORM_MACOS)
     set(STEAMLIB ${STEAMWORKS_SDK_DIR}/redistributable_bin/osx/libsteam_api.dylib)
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated-declarations")  
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated-declarations")
     message(STATUS "Building for macOS")
     target_link_libraries(skeldal ${all_libs} ${STEAMLIB})
-else() 
+else()
     error("Platform not detected, please add new platform here")
 endif()
 set_property(TARGET skeldal_platform PROPERTY CXX_STANDARD 20)

platform/linux/app_start.cpp

@@ -19,6 +19,7 @@ void show_help(const char *arg0) {
            "-a <adv>        path for adventure file (.adv)\n"
            "-l <lang>       set language (cz|en)\n"
            "-s <directory>  generate string-tables (for localization) and exit\n"
+           "-L <host:port>  connect to host:port to listen commands (mapedit)\n"
            "-h              this help\n");
     exit(1);
 }
@@ -33,13 +34,15 @@ int main(int argc, char **argv) {
     std::string adv_config_file;
     std::string gen_stringtable_path;
     std::string lang;
-    for (int optchr = -1; (optchr = getopt(argc, argv, "hf:a:s:l:")) != -1; ) {
+    std::string sse_hostport;
+    for (int optchr = -1; (optchr = getopt(argc, argv, "hf:a:s:l:L:")) != -1; ) {
         switch (optchr) {
             case 'f': config_name = optarg;break;
             case 'a': adv_config_file = optarg;break;
             case 'h': show_help(argv[0]);break;
             case 'l': lang = optarg;break;
             case 's': gen_stringtable_path = optarg;break;
+            case 'L': sse_hostport = optarg;break;
             default: show_help_short();
                      return 1;
         }
@@ -53,6 +56,7 @@ int main(int argc, char **argv) {
     cfg.adventure_path = adv_config_file.empty()?NULL:adv_config_file.c_str();
     cfg.config_path = config_name.c_str();
     cfg.lang_path = lang.empty()?NULL:lang.c_str();
+    cfg.sse_hostport = sse_hostport.c_str();
     try {
 
         if (!gen_stringtable_path.empty()) {

platform/mtqueue.cpp

@@ -0,0 +1,44 @@
+#include "mtqueue.h"
+
+#include <cstring>
+#include <malloc.h>
+#include <memory>
+#include <mutex>
+#include <queue>
+struct StringDeleter {
+    void operator()(char *x) {
+        free(x);
+    }
+};
+
+std::unique_ptr<char, StringDeleter> alloc_string(const char *x) {
+    return std::unique_ptr<char, StringDeleter>(strdup(x));
+}
+
+
+typedef struct tag_mtqueue {
+    std::queue<std::unique_ptr<char, StringDeleter> > _q;
+    std::mutex _mx;
+
+
+} MTQUEUE;
+
+MTQUEUE *mtqueue_create() {
+    return new MTQUEUE();
+}
+void mtqueue_push(MTQUEUE *q, const char *message) {
+    std::lock_guard _(q->_mx);
+    q->_q.push(alloc_string(message));
+}
+char *mtqueue_pop(MTQUEUE *q) {
+    std::lock_guard _(q->_mx);
+    if (q->_q.empty()) return NULL;
+    else {
+        char *c = q->_q.front().release();
+        q->_q.pop();
+        return c;
+    }
+}
+void mtqueue_destroy(MTQUEUE *q) {
+    delete q;
+}

platform/mtqueue.h

@@ -0,0 +1,32 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+typedef struct tag_mtqueue MTQUEUE;
+///Create multithread queue
+MTQUEUE *mtqueue_create();
+///push to queue (string is copied)
+/**
+ * @param q queue
+ * @param message message (string is copied)
+ */
+void mtqueue_push(MTQUEUE *q, const char *message);
+///pop from the queue
+/**
+ *
+ * @param q queue
+ * @return NULL, if queue is empty, or string. You have to release
+ * string by calling free() when you finish.
+ */
+char *mtqueue_pop(MTQUEUE *q);
+
+///destroy the queue
+void mtqueue_destroy(MTQUEUE *q);
+
+
+#ifdef __cplusplus
+}
+#endif

platform/sse_receiver.cpp

@@ -0,0 +1,142 @@
+#include "sse_receiver.h"
+
+#include <atomic>
+#include <thread>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <functional>
+
+#ifdef _WIN32
+  #include <winsock2.h>
+  #include <ws2tcpip.h>
+  #pragma comment(lib, "ws2_32.lib")
+  typedef SOCKET sock_t;
+  #define CLOSESOCK closesocket
+  #define sock_init() { WSADATA wsa; WSAStartup(MAKEWORD(2,2), &wsa); }
+  #define sock_cleanup() WSACleanup()
+  #define SHUT_RD SD_RECEIVE
+#else
+  #include <unistd.h>
+  #include <sys/types.h>
+  #include <sys/socket.h>
+  #include <netdb.h>
+  #include <fcntl.h>
+  typedef int sock_t;
+  #define INVALID_SOCKET -1
+  #define CLOSESOCK close
+  #define sock_init()
+  #define sock_cleanup()
+#endif
+
+#define BUFFER_SIZE 1024
+
+
+void sse_client_loop(const char *host, const char *port, std::function<void(const char *)> callback, std::stop_token tkn) {
+    sock_init();
+
+    struct addrinfo hints = {}, *res = NULL;
+    hints.ai_family = AF_INET;
+    hints.ai_socktype = SOCK_STREAM;
+
+    if (getaddrinfo(host, port, &hints, &res) != 0) {
+        perror("getaddrinfo");
+        return;
+    }
+
+    sock_t sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
+    if (sock == INVALID_SOCKET) {
+        perror("socket");
+        freeaddrinfo(res);
+        return;
+    }
+
+
+
+    if (connect(sock, res->ai_addr, res->ai_addrlen) != 0) {
+        perror("connect");
+        CLOSESOCK(sock);
+        freeaddrinfo(res);
+        return;
+    }
+
+
+    freeaddrinfo(res);
+
+    {
+        std::stop_callback _cb(tkn, [&]{
+            shutdown(sock, SHUT_RD);
+        });
+
+        // Send HTTP GET request
+        char req[512];
+        snprintf(req, sizeof(req),
+                 "GET /command HTTP/1.1\r\n"
+                 "Host: %s\r\n"
+                 "Accept: text/event-stream\r\n"
+                 "Connection: keep-alive\r\n\r\n", host);
+        send(sock, req, strlen(req), 0);
+
+        // Read response and extract "data: " lines
+        char buffer[BUFFER_SIZE];
+        int buf_len = 0;
+
+        while (!tkn.stop_requested()) {
+            int n = recv(sock, buffer + buf_len, BUFFER_SIZE - buf_len - 1, 0);
+            if (n <= 0) {
+                break;
+            }
+
+            buf_len += n;
+            buffer[buf_len] = '\0';
+
+            char *line_start = buffer;
+            while (1) {
+                char *newline = strstr(line_start, "\n");
+                if (!newline) break;
+
+                *newline = '\0';
+
+                if (strncmp(line_start, "data: ", 6) == 0) {
+                    callback(line_start + 6);
+                }
+
+                line_start = newline + 1;
+            }
+
+            // Move leftover data to start
+            buf_len = strlen(line_start);
+            memmove(buffer, line_start, buf_len);
+        }
+
+    }
+    CLOSESOCK(sock);
+    sock_cleanup();
+    return;
+}
+
+
+
+
+typedef struct tag_sse_receiver {
+    std::jthread thr;
+}
+SSE_RECEIVER;
+
+SSE_RECEIVER *sse_receiver_install(MTQUEUE *q, const char *host, const char *port) {
+    SSE_RECEIVER *sse = new SSE_RECEIVER;
+    sse->thr = std::jthread([sse, q, host = std::string(host), port = std::string(port)](std::stop_token tkn){
+        while (!tkn.stop_requested()) {
+            std::this_thread::sleep_for(std::chrono::seconds(2));
+            sse_client_loop(host.c_str(), port.c_str(), [q](const char *msg){
+                mtqueue_push(q, msg);
+            }, tkn);
+        }
+    });
+    return sse;
+}
+void sse_receiver_stop(SSE_RECEIVER *inst) {
+    delete inst;
+}
+

platform/sse_receiver.h

@@ -0,0 +1,30 @@
+#pragma once
+
+#include "mtqueue.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct tag_sse_receiver SSE_RECEIVER;
+
+///Install sse receiver
+/**
+ * @param q mtqueue, which receives messages received by the receiver
+ * @param host host
+ * @param port port
+ * @return pointer to instance of receiver
+ */
+SSE_RECEIVER *sse_receiver_install(MTQUEUE *q, const char *host, const char *port);
+
+///Stops the receiver
+/**
+ * @param inst instance of receiver
+ * @note the associated queue is not destroyed
+ */
+void sse_receiver_stop(SSE_RECEIVER *inst);
+
+
+#ifdef __cplusplus
+}
+#endif

platform/windows/app_start.cpp

@@ -10,7 +10,7 @@
 #include <shellapi.h>
 
 void show_help(std::ostream &out, const char *arg0) {
-    out << 
+    out <<
             "Brany Skeldalu (Gates of Skeldal) portable game player\n"
             "Copyright (c) 2025 Ondrej Novak. All rights reserved.\n\n"
             "This work is licensed under the terms of the MIT license.\n"
@@ -22,7 +22,8 @@ void show_help(std::ostream &out, const char *arg0) {
            "-a <adv>        path for adventure file (.adv)\n"
            "-l <lang>       set language (cz|en)\n"
            "-s <directory>  generate string-tables (for localization) and exit\n"
-           "-h              this help\n";    
+           "-L <host:port>  connect to host:port to listen commands (mapedit)\n"
+           "-h              this help\n";
 }
 
 void show_help_short(std::ostream &out) {
@@ -30,20 +31,22 @@ void show_help_short(std::ostream &out) {
 }
 
 
-int main(int argc, char **argv) {    
+int main(int argc, char **argv) {
     std::string config_name = SKELDALINI;
     std::string adv_config_file;
     std::string gen_stringtable_path;
     std::string lang;
+    std::string sse_hostport;
     std::ostringstream console;
-    for (int optchr = -1; (optchr = getopt(argc, argv, "hf:a:s:l:")) != -1; ) {
+    for (int optchr = -1; (optchr = getopt(argc, argv, "hf:a:s:l:L:")) != -1; ) {
         switch (optchr) {
             case 'f': config_name = optarg;break;
             case 'a': adv_config_file = optarg;break;
             case 'h': show_help(console, argv[0]);break;
             case 'l': lang = optarg;break;
             case 's': gen_stringtable_path = optarg;break;
-            default:  show_help_short(console);break;                    
+            case 'L': sse_hostport = optarg;break;
+            default:  show_help_short(console);break;
         }
     }
 
@@ -52,7 +55,7 @@ int main(int argc, char **argv) {
         show_help(console, argv[0]);
     }
 
-    SKELDAL_CONFIG cfg;
+    SKELDAL_CONFIG cfg = {};
     cfg.short_help = []{};
     cfg.show_error = [](const char *txt) {
         char buff[MAX_PATH];
@@ -63,6 +66,7 @@ int main(int argc, char **argv) {
     cfg.adventure_path = adv_config_file.empty()?NULL:adv_config_file.c_str();
     cfg.config_path = config_name.c_str();
     cfg.lang_path = lang.empty()?NULL:lang.c_str();
+    cfg.sse_hostport = sse_hostport.c_str();
 
     {
         std::string msg = console.str();