fix filename display on windows

readme.md

@@ -2,18 +2,21 @@
 
 **c**onsole **i**nterface **m**usic **p**layer
 
-A lightweight, keyboard-driven music player for the terminal, written in
-QuickBASIC (QB64). It plays audio files and M3U playlists directly from the
-command line, with a minimal two-line display showing playback state.
+A keyboard-driven music player for the terminal, written in QuickBASIC (QB64).
+It plays audio files and M3U playlists directly from the command line, featuring
+a minimal two-line display showing playback state and an IPC remote control
+interface.
 
 ## Features
 
-- Plays individual audio files or M3U playlists
-- Real-time progress bar and time display (elapsed or remaining)
-- Volume control and seeking via arrow keys
-- Shuffle and repeat modes
-- Cross-platform: works on Linux, macOS, and Windows
-- Unicode-aware display
+- Plays individual audio files or M3U playlists.
+- Real-time progress bar and time display (elapsed or remaining).
+- Volume control and seeking via arrow keys.
+- Shuffle and repeat modes.
+- **Client/Server IPC Architecture**: Control a running instance of `cimp` from
+  another terminal window or script.
+- Cross-platform: works on Linux, macOS, and Windows.
+- Unicode-aware display with support for full-width character width matching.
 
 ## Building
 
@@ -36,9 +39,12 @@ qb64 -x cimp.bas
 cimp [options] <file|playlist> [file2 ...]
 ```
 
-Pass one or more audio files or `.m3u` playlists. At least one file is required.
+Pass one or more audio files or `.m3u` playlists. At least one file is required
+unless sending a remote control command.
 
-### Options
+### Global & Server Options
+
+These flags control the primary player instance when launched.
 
 | Flag     | Long form      | Description                              |
 | -------- | -------------- | ---------------------------------------- |
@@ -47,21 +53,65 @@ Pass one or more audio files or `.m3u` playlists. At least one file is required.
 | `-r [1]` | `--repeat [1]` | Repeat all (`-r`) or repeat one (`-r 1`) |
 | `-n`     | `--nooutput`   | Run silently with no display             |
 
+### Remote Control (Client Mode) Commands
+
+If `cimp` is already running in a terminal, running it again with any of the
+following arguments will send an instruction to the active player instead of
+starting a new one:
+
+| Command                   | Description                                                |
+| ------------------------- | ---------------------------------------------------------- |
+| `--play`                  | Resume playback                                            |
+| `--pause`                 | Pause playback                                             |
+| `--stop`                  | Stop playback                                              |
+| `--next`                  | Skip to the next track                                     |
+| `--prev`                  | Skip to the previous track                                 |
+| `-v <n>` / `--volume <n>` | Remotely adjust volume (0–100)                             |
+| `--shuffle`               | Reshuffle the current playlist queue                       |
+| `--repeat`                | Set player to repeat all                                   |
+| `--repeat-1`              | Set player to repeat current track                         |
+| `--add <file>`            | Append a new file or playlist to the active queue          |
+| `--playlist`              | Fetch and print the current playback queue from the server |
+| `--quit`                  | Remotely close the running player instance                 |
+
 ### Examples
 
+#### Play a single file normally
+
 ```shell
-# Play a single file
 cimp song.mp3
+```
 
-# Play a playlist shuffled at 80% volume
-cimp -s -v 80 playlist.m3u
+### Remote control examples (Run from a separate terminal)
 
-# Play multiple files with repeat
-cimp -r track1.ogg track2.ogg track3.ogg
+#### Pause the music
+
+```shell
+cimp --pause
+```
+
+#### Lower the volume to 20%
+
+```shell
+cimp --volume 20
+```
+
+#### Add another track to the background player's active queue
+
+```shell
+cimp --add extra_track.flac
+```
+
+#### View the active playlist queue
+
+```shell
+cimp --playlist
 ```
 
 ## Keybindings
 
+When interacting directly with the player interface terminal, use these keys:
+
 | Key           | Action                                    |
 | ------------- | ----------------------------------------- |
 | `↑` / `↓`     | Volume up / down                          |
@@ -85,13 +135,19 @@ both compilers:
 
 ## Files
 
-| File          | Description                                                                  |
-| ------------- | ---------------------------------------------------------------------------- |
-| `cimp.bas`    | Main player — QB64-PE source                                                 |
-| `terminkey.h` | C library for cross-platform raw keyboard input and terminal width detection |
+| File          | Description                                                                             |
+| ------------- | --------------------------------------------------------------------------------------- |
+| `cimp.bas`    | Main player — QB64-PE source handling client/server states and UI                       |
+| `terminkey.h` | C library for cross-platform raw keyboard input, IPC pipes/sockets, and terminal sizing |
 
 ## Notes
 
+- **IPC Backend**: On Windows, IPC relies on Named Pipes (`\\.\pipe\cimp_ipc`).
+  On Linux/macOS, it binds to a local Unix Domain Socket at
+  `/tmp/cimp_ipc_<uid>.sock`.
 - M3U paths can be absolute or relative to the playlist file's directory.
 - Volume adjustment is non-linear for a more natural response and better control
   at lower ranges.
+
+```
+```

terminkey.h

@@ -3,11 +3,23 @@
 #ifdef _WIN32
     #include <windows.h>
     #include <conio.h>
+    #include <stdio.h>
+    #include <string.h>
+    #include <stdlib.h>
+    #include <stdint.h>
 #else
     #include <termios.h>
     #include <unistd.h>
     #include <fcntl.h>
     #include <sys/ioctl.h>
+    #include <sys/socket.h>
+    #include <sys/un.h>
+    #include <sys/types.h>
+    #include <stdio.h>
+    #include <string.h>
+    #include <stdlib.h>
+    #include <limits.h>
+    #include <stdint.h>
 #endif
 
 // Special key codes (unified across platforms)
@@ -21,8 +33,17 @@ void echooff();
 void echoon();
 int termwidth();
 
+int ipc_init();
+int ipc_check_message(uintptr_t buffer_ptr, int max_len);
+void ipc_send_message(const char* message);
+void ipc_cleanup();
+
 #ifdef _WIN32
 
+static HANDLE hServerPipe = INVALID_HANDLE_VALUE;
+static OVERLAPPED oOverlap;
+static BOOL fPendingIO = FALSE;
+
 int terminkey() {
     if (_kbhit()) {
         int ch = _getch();
@@ -65,8 +86,126 @@ int termwidth() {
     return -1;
 }
 
+int ipc_init() {
+    // Create a regular blocking pipe, but enable FILE_FLAG_OVERLAPPED for safe async I/O
+    hServerPipe = CreateNamedPipe(
+        "\\\\.\\pipe\\cimp_ipc",
+        PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
+        PIPE_TYPE_BYTE | PIPE_READMODE_BYTE, 
+        1,
+        4096,
+        4096,
+        0,
+        NULL
+    );
+    if (hServerPipe == INVALID_HANDLE_VALUE) {
+        DWORD err = GetLastError();
+        if (err == ERROR_ACCESS_DENIED || err == ERROR_PIPE_BUSY) {
+            return 0; // Already running (Client Mode)
+        }
+        return -1; // Other error
+    }
+
+    // Initialize the overlapped structure and create an event
+    memset(&oOverlap, 0, sizeof(OVERLAPPED));
+    oOverlap.hEvent = CreateEvent(NULL, TRUE, TRUE, NULL);
+    fPendingIO = FALSE;
+
+    return 1; // Server mode successfully started
+}
+
+int ipc_check_message(uintptr_t buffer_ptr, int max_len) {
+    if (hServerPipe == INVALID_HANDLE_VALUE) return 0;
+    
+    char* buffer = (char*)buffer_ptr;
+    DWORD bytesRead = 0;
+
+    if (!fPendingIO) {
+        // Start an asynchronous listen operation
+        if (!ConnectNamedPipe(hServerPipe, &oOverlap)) {
+            DWORD err = GetLastError();
+            if (err == ERROR_IO_PENDING) {
+                fPendingIO = TRUE;
+            } else if (err == ERROR_PIPE_CONNECTED) {
+                // Client already connected before we listened!
+                SetEvent(oOverlap.hEvent);
+                fPendingIO = TRUE;
+            }
+        }
+    }
+
+    if (fPendingIO) {
+        // Check if the connection event has triggered without waiting (0ms timeout)
+        if (WaitForSingleObject(oOverlap.hEvent, 0) == WAIT_OBJECT_0) {
+            DWORD cbRet = 0;
+            // Connection is ready, let's see if there is data
+            if (GetOverlappedResult(hServerPipe, &oOverlap, &cbRet, FALSE)) {
+                DWORD bytesAvail = 0;
+                if (PeekNamedPipe(hServerPipe, NULL, 0, NULL, &bytesAvail, NULL) && bytesAvail > 0) {
+                    // Data has arrived, read it synchronously
+                    BOOL success = ReadFile(hServerPipe, buffer, max_len - 1, &bytesRead, NULL);
+                    if (success && bytesRead > 0) {
+                        buffer[bytesRead] = '\0';
+                        
+                        // Clean up and reset for the next client connection
+                        DisconnectNamedPipe(hServerPipe);
+                        ResetEvent(oOverlap.hEvent);
+                        fPendingIO = FALSE;
+                        return (int)bytesRead;
+                    }
+                }
+            } else {
+                // Client disconnected or pipe broke before sending
+                DisconnectNamedPipe(hServerPipe);
+                ResetEvent(oOverlap.hEvent);
+                fPendingIO = FALSE;
+            }
+        }
+    }
+    return 0;
+}
+
+void ipc_send_message(const char* message) {
+    HANDLE hPipe = CreateFile(
+        "\\\\.\\pipe\\cimp_ipc",
+        GENERIC_WRITE,
+        0,
+        NULL,
+        OPEN_EXISTING,
+        0,
+        NULL
+    );
+    if (hPipe != INVALID_HANDLE_VALUE) {
+        DWORD bytesWritten = 0;
+        WriteFile(hPipe, message, strlen(message), &bytesWritten, NULL);
+        CloseHandle(hPipe);
+    }
+}
+
+void ipc_cleanup() {
+    if (hServerPipe != INVALID_HANDLE_VALUE) {
+        DisconnectNamedPipe(hServerPipe);
+        CloseHandle(hServerPipe);
+        hServerPipe = INVALID_HANDLE_VALUE;
+    }
+    if (oOverlap.hEvent != NULL) {
+        CloseHandle(oOverlap.hEvent);
+        oOverlap.hEvent = NULL;
+    }
+}
+
 #else
 
+static int server_fd = -1;
+static char socket_path[256] = "";
+
+static void get_socket_path() {
+    if (socket_path[0] == '\0') {
+        uid_t uid = getuid();
+        snprintf(socket_path, sizeof(socket_path), "/tmp/cimp_ipc_%u.sock", (unsigned int)uid);
+    }
+}
+
 int terminkey() {
     struct termios oldt, newt;
     int ch;
@@ -126,4 +265,102 @@ int termwidth() {
     return -1; 
 }
 
+int ipc_init() {
+    get_socket_path();
+    
+    int test_fd = socket(AF_UNIX, SOCK_STREAM, 0);
+    if (test_fd >= 0) {
+        struct sockaddr_un addr;
+        memset(&addr, 0, sizeof(addr));
+        addr.sun_family = AF_UNIX;
+        strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path) - 1);
+        if (connect(test_fd, (struct sockaddr*)&addr, sizeof(addr)) == 0) {
+            close(test_fd);
+            return 0; // Already running
+        }
+        close(test_fd);
+    }
+    
+    unlink(socket_path);
+    
+    server_fd = socket(AF_UNIX, SOCK_STREAM, 0);
+    if (server_fd < 0) {
+        return -1;
+    }
+    
+    int flags = fcntl(server_fd, F_GETFL, 0);
+    fcntl(server_fd, F_SETFL, flags | O_NONBLOCK);
+    
+    struct sockaddr_un addr;
+    memset(&addr, 0, sizeof(addr));
+    addr.sun_family = AF_UNIX;
+    strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path) - 1);
+    
+    if (bind(server_fd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
+        close(server_fd);
+        server_fd = -1;
+        return -1;
+    }
+    
+    if (listen(server_fd, 5) < 0) {
+        close(server_fd);
+        server_fd = -1;
+        unlink(socket_path);
+        return -1;
+    }
+    
+    return 1;
+}
+
+int ipc_check_message(uintptr_t buffer_ptr, int max_len) {
+    if (server_fd < 0) return 0;
+    
+    char* buffer = (char*)buffer_ptr;
+    int client_fd = accept(server_fd, NULL, NULL);
+    if (client_fd < 0) {
+        return 0;
+    }
+    
+    int total_read = 0;
+    while (total_read < max_len - 1) {
+        int r = read(client_fd, buffer + total_read, max_len - 1 - total_read);
+        if (r <= 0) break;
+        total_read += r;
+    }
+    buffer[total_read] = '\0';
+    close(client_fd);
+    return total_read;
+}
+
+void ipc_send_message(const char* message) {
+    get_socket_path();
+    int client_fd = socket(AF_UNIX, SOCK_STREAM, 0);
+    if (client_fd < 0) return;
+    
+    struct sockaddr_un addr;
+    memset(&addr, 0, sizeof(addr));
+    addr.sun_family = AF_UNIX;
+    strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path) - 1);
+    
+    if (connect(client_fd, (struct sockaddr*)&addr, sizeof(addr)) == 0) {
+        int total_written = 0;
+        int len = strlen(message);
+        while (total_written < len) {
+            int w = write(client_fd, message + total_written, len - total_written);
+            if (w <= 0) break;
+            total_written += w;
+        }
+    }
+    close(client_fd);
+}
+
+void ipc_cleanup() {
+    if (server_fd >= 0) {
+        close(server_fd);
+        server_fd = -1;
+    }
+    get_socket_path();
+    unlink(socket_path);
+}
+
 #endif

test_ipc.bas

@@ -0,0 +1,44 @@
+$console:only
+declare library "terminkey"
+    function ipc_init&()
+    function ipc_check_message%(byval buf as _offset, byval max_len as long)
+    sub ipc_send_message(buf as string)
+    sub ipc_cleanup()
+    sub get_absolute_path(rel_path as string, byval abs_path as _offset, byval max_len as long)
+end declare
+
+dim r as long
+r = ipc_init
+print "ipc_init returned:"; r
+
+if r = 1 then
+    print "We are the server! Waiting for a message..."
+    dim msg as string
+    msg = space$(100) + chr$(0)
+    dim start_time as double
+    start_time = timer
+    do while timer - start_time < 3
+        dim n as long
+        n = ipc_check_message(_offset(msg), 100)
+        if n > 0 then
+            print "Received: "; left$(msg, n)
+            exit do
+        end if
+        _limit 10
+    loop
+    ipc_cleanup
+elseif r = 0 then
+    print "We are the client! Sending a message..."
+    ipc_send_message "Hello from client!"
+else
+    print "Error initializing IPC"
+end if
+
+dim rel as string
+rel = "readme.md"
+dim abs_path as string
+abs_path = space$(512) + chr$(0)
+get_absolute_path rel, _offset(abs_path), 512
+print "Absolute path of '"; rel; "' is: '"; _trim$(abs_path); "'"
+
+system

todo.md

@@ -0,0 +1,12 @@
+# todo
+## ipc
+add ipc functionality so it's possible while the program runs to:
+- ~play next and previous track with `cimp --next` and `cimp --prev`~
+- ~change volume with `cimp --volume xx`~
+- ~add file to playlist with `cimp --add filename.ext`~
+- if started without `--add` it should clear the playlist and load and play the given file or playlist.
+- if given the flag `--playlist` it should output the song array as a playlist.
+- start stop pause and quit would be good, repeat as well.
+the c functions are ready in terminkey.h and an example of how it works is found in test_ipc.bas
+
+## recurcive add all music in folder