Event loop in tclmain.c rewritten. New method searchStatus.

[ir-tcl-moved-to-github.git] / tclmain.c

diff --git a/tclmain.c b/tclmain.c
index c782cf4..7e5ae24 100644 (file)
--- a/tclmain.c
+++ b/tclmain.c
@@ -1,9 +1,13 @@
 /*
  * IR toolkit for tcl/tk
  * (c) Index Data 1995
+ * Sebastian Hammer, Adam Dickmeiss
  *
  * $Log: tclmain.c,v $
- * Revision 1.4  1995-03-17 07:50:31  adam
+ * Revision 1.5  1995-03-20 08:53:30  adam
+ * Event loop in tclmain.c rewritten. New method searchStatus.
+ *
+ * Revision 1.4  1995/03/17  07:50:31  adam
  * Headers have changed a little.
  *
  */
@@ -19,9 +23,19 @@
 
 static char *fileName = NULL;
 
-static fd_set fdset_tcl;
+/* select(2) callbacks */
+struct callback {
+    void (*r_handle)(void *p);
+    void (*w_handle)(void *p);
+    void (*x_handle)(void *p);
+    void *obj;
+};
+#define MAX_CALLBACK 200
+
+static struct callback callback_table[MAX_CALLBACK];
+static int max_fd = 3;            /* don't worry: it will grow... */
 
-void tcl_mainloop (Tcl_Interp *interp);
+void tcl_mainloop (Tcl_Interp *interp, int interactive);
 
 int Tcl_AppInit (Tcl_Interp *interp)
 {
@@ -36,6 +50,7 @@ int main (int argc, char **argv)
 {
     Tcl_Interp *interp;
     int code;
+    int i;
 
     interp = Tcl_CreateInterp();
     Tcl_SetVar (interp, "tcl_interactive", "0", TCL_GLOBAL_ONLY);
@@ -45,6 +60,12 @@ int main (int argc, char **argv)
     if (Tcl_AppInit(interp) != TCL_OK) {
         fprintf(stderr, "Tcl_AppInit failed: %s\n", interp->result);
     }
+    for (i=0; i<MAX_CALLBACK; i++)
+    {
+        callback_table[i].r_handle = NULL;
+        callback_table[i].w_handle = NULL;
+        callback_table[i].x_handle = NULL;
+    }
     if (fileName)
     {
         code = Tcl_EvalFile (interp, fileName);
@@ -52,56 +73,90 @@ int main (int argc, char **argv)
             printf ("%s\n", interp->result);
         if (code != TCL_OK)
             exit (1);
+        tcl_mainloop (interp, 0);
+    }
+    else
+    {
+        Tcl_SetVar (interp, "tcl_interactive", "1", TCL_GLOBAL_ONLY);
+        tcl_mainloop (interp, 1);
     }
-    Tcl_SetVar (interp, "tcl_interactive", "1", TCL_GLOBAL_ONLY);
-    tcl_mainloop (interp);
     exit (0);
 }
 
-struct callback {
-    void (*handle)(void *p);
-    void *obj;
-};
-
-#define MAX_CALLBACK 20
-
-struct callback callback_table[MAX_CALLBACK];
-
-void tcl_mainloop (Tcl_Interp *interp)
+void tcl_mainloop (Tcl_Interp *interp, int interactive)
 {
     int i;
     int res;
-    int count;
-    char input_buf[256];
     Tcl_DString command;
+    static fd_set fdset_tcl_r;
+    static fd_set fdset_tcl_w;
+    static fd_set fdset_tcl_x;
+    int min_fd;
 
-    for (i=0; i<MAX_CALLBACK; i++)
-        callback_table[i].handle = NULL;
-    Tcl_DStringInit (&command);
-    printf ("[TCL]"); fflush (stdout);
+    min_fd = interactive ? 3 : 0;
+    if (interactive)
+    {
+        Tcl_DStringInit (&command);
+        printf ("[TCL]"); fflush (stdout);
+    }
     while (1)
     {
-        FD_ZERO (&fdset_tcl);
-        FD_SET (0, &fdset_tcl);
-        for (i=3; i<MAX_CALLBACK; i++)
-            if (callback_table[i].handle)
-                FD_SET (i, &fdset_tcl);
-        if ((res = select(MAX_CALLBACK+1, &fdset_tcl, 0, 0, 0)) < 0)
+        FD_ZERO (&fdset_tcl_r);
+        FD_ZERO (&fdset_tcl_w);
+        FD_ZERO (&fdset_tcl_x);
+        if (interactive)
+            FD_SET (0, &fdset_tcl_r);
+        for (res=0, i=min_fd; i<=max_fd; i++)
+        {
+            if (callback_table[i].w_handle)
+            {
+                FD_SET (i, &fdset_tcl_w);
+                res++;
+            }
+            if (callback_table[i].r_handle)
+            {
+                FD_SET (i, &fdset_tcl_r);
+                res++;
+            }
+            if (callback_table[i].x_handle)
+            {
+                FD_SET (i, &fdset_tcl_x);
+                res++;
+            }
+        }
+        if (!interactive && !res)
+            return;
+        if ((res = select(max_fd+1, &fdset_tcl_r, &fdset_tcl_w, 
+                          &fdset_tcl_x, 0)) < 0)
         {
             perror("select");
             exit(1);
         }
         if (!res)
             continue;
-        for (i=3; i<MAX_CALLBACK; i++)
-            if (FD_ISSET (i, &fdset_tcl))
+        for (i=min_fd; i<=max_fd; i++)
+        {
+            if (FD_ISSET (i, &fdset_tcl_r))
+            {
+                assert (callback_table[i].r_handle);
+                (*callback_table[i].r_handle) (callback_table[i].obj);
+            }
+            if (FD_ISSET (i, &fdset_tcl_w))
             {
-                assert (callback_table[i].handle);
-                (*callback_table[i].handle) (callback_table[i].obj);
+                assert (callback_table[i].w_handle);
+                (*callback_table[i].w_handle) (callback_table[i].obj);
             }
-        if (FD_ISSET(0, &fdset_tcl))
+            if (FD_ISSET (i, &fdset_tcl_x))
+            {
+                assert (callback_table[i].x_handle);
+                (*callback_table[i].x_handle) (callback_table[i].obj);
+            }
+        }
+        if (interactive && FD_ISSET(0, &fdset_tcl_r))
         {
-            count = read (0, input_buf, 256);
+            char input_buf[256];
+            int count = read (0, input_buf, 256);
+
             if (count <= 0)
                 exit (0);
             Tcl_DStringAppend (&command, input_buf, count);
@@ -122,10 +177,28 @@ void tcl_mainloop (Tcl_Interp *interp)
 void ir_select_add (int fd, void *obj)
 {
     callback_table[fd].obj = obj;
-    callback_table[fd].handle = ir_select_proc;
+    callback_table[fd].r_handle = ir_select_read;
+    callback_table[fd].w_handle = NULL;
+    callback_table[fd].x_handle = NULL;
+    if (fd > max_fd)
+        max_fd = fd;
+}
+
+void ir_select_add_write (int fd, void *obj)
+{
+    callback_table[fd].w_handle = ir_select_write;
+    if (fd > max_fd)
+        max_fd = fd;
+}
+
+void ir_select_remove_write (int fd, void *obj)
+{
+    callback_table[fd].w_handle = NULL;
 }
 
 void ir_select_remove (int fd, void *obj)
 {
-    callback_table[fd].handle = NULL;
+    callback_table[fd].r_handle = NULL;
+    callback_table[fd].w_handle = NULL;
+    callback_table[fd].x_handle = NULL;
 }