Initrequests implemented with callback support.

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

diff --git a/tclmain.c b/tclmain.c
index 203d8aa..70d0db1 100644 (file)
--- a/tclmain.c
+++ b/tclmain.c
@@ -2,15 +2,24 @@
  * IR toolkit for tcl/tk
  * (c) Index Data 1995
  *
- * $Id: tclmain.c,v 1.1 1995-03-06 17:05:34 adam Exp $
+ * $Id: tclmain.c,v 1.2 1995-03-08 07:28:37 adam Exp $
  */
 
+#include <sys/time.h>
+#include <sys/types.h>
+#include <assert.h>
+#include <unistd.h>
+
 #include <tcl.h>
 
 #include "ir-tcl.h"
 
 static char *fileName = NULL;
 
+static fd_set fdset_tcl;
+
+void tcl_mainloop (Tcl_Interp *interp);
+
 int Tcl_AppInit (Tcl_Interp *interp)
 {
     if (Tcl_Init(interp) == TCL_ERROR)
@@ -40,12 +49,81 @@ int main (int argc, char **argv)
     }
     if (Tcl_AppInit(interp) != TCL_OK) {
         fprintf(stderr, "Tcl_AppInit failed: %s\n", interp->result);
-    }    
+    }
     code = Tcl_EvalFile (interp, fileName);
     if (*interp->result != 0)
         printf ("%s\n", interp->result);
     if (code != TCL_OK)
         exit (1);
+    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)
+{
+    int i;
+    int res;
+    int count;
+    char input_buf[256];
+    Tcl_DString command;
+
+    for (i=0; i<MAX_CALLBACK; i++)
+        callback_table[i].handle = NULL;
+    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)
+        {
+            perror("select");
+            exit(1);
+        }
+        if (!res)
+            continue;
+        for (i=3; i<MAX_CALLBACK; i++)
+            if (FD_ISSET (i, &fdset_tcl))
+            {
+                assert (callback_table[i].handle);
+                (*callback_table[i].handle) (callback_table[i].obj);
+            }
+        if (FD_ISSET(0, &fdset_tcl))
+        {
+            count = read (0, input_buf, 256);
+            if (count <= 0)
+                exit (0);
+            Tcl_DStringAppend (&command, input_buf, count);
+            if (Tcl_CommandComplete (Tcl_DStringValue (&command)))
+            {
+                int code = Tcl_Eval (interp, Tcl_DStringValue (&command));
+                Tcl_DStringFree (&command);
+                printf ("[RES:%s]\n", interp->result);
+                printf ("[TCL]"); fflush (stdout);
+            }
+        }
+    }
+}
+
+void ir_select_add (int fd, void *obj)
+{
+    callback_table[fd].obj = obj;
+    callback_table[fd].handle = ir_select_proc;
+}
+
+void ir_select_remove (int fd, void *obj)
+{
+    callback_table[fd].handle = NULL;
+}