X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=tclmain.c;h=7e5ae24619365d8b36900401eee1c0e197861515;hb=df5d5526e333bd83a4f656840e7bb57df4bd7f9d;hp=203d8aa2923e8d0186860abfa1cb0a79bdc5e125;hpb=075ab693cfc579ae9dbefd78d32d852e7b18d306;p=ir-tcl-moved-to-github.git

diff --git a/tclmain.c b/tclmain.c
index 203d8aa..7e5ae24 100644
--- a/tclmain.c
+++ b/tclmain.c
@@ -1,16 +1,42 @@
 /*
  * IR toolkit for tcl/tk
  * (c) Index Data 1995
+ * Sebastian Hammer, Adam Dickmeiss
+ *
+ * $Log: tclmain.c,v $
+ * 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.
  *
- * $Id: tclmain.c,v 1.1 1995-03-06 17:05:34 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;
 
+/* 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, int interactive);
+
 int Tcl_AppInit (Tcl_Interp *interp)
 {
     if (Tcl_Init(interp) == TCL_ERROR)
@@ -24,28 +50,155 @@ 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);
+    if (argc == 2)
+        fileName = argv[1];
 
-    if (argc != 2)
+    if (Tcl_AppInit(interp) != TCL_OK) {
+        fprintf(stderr, "Tcl_AppInit failed: %s\n", interp->result);
+    }
+    for (i=0; i<MAX_CALLBACK; i++)
     {
-        fprintf (stderr, "Script file expected\n");
-        exit (1);
+        callback_table[i].r_handle = NULL;
+        callback_table[i].w_handle = NULL;
+        callback_table[i].x_handle = NULL;
     }
-    fileName = argv[1];
-    if (fileName == NULL)
+    if (fileName)
     {
-        fprintf (stderr, "No filename specified\n");
-        exit (1);
+        code = Tcl_EvalFile (interp, fileName);
+        if (*interp->result != 0)
+            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);
     }
-    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);
     exit (0);
 }
 
+void tcl_mainloop (Tcl_Interp *interp, int interactive)
+{
+    int i;
+    int res;
+    Tcl_DString command;
+    static fd_set fdset_tcl_r;
+    static fd_set fdset_tcl_w;
+    static fd_set fdset_tcl_x;
+    int min_fd;
+
+    min_fd = interactive ? 3 : 0;
+    if (interactive)
+    {
+        Tcl_DStringInit (&command);
+        printf ("[TCL]"); fflush (stdout);
+    }
+    while (1)
+    {
+        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=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].w_handle);
+                (*callback_table[i].w_handle) (callback_table[i].obj);
+            }
+            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))
+        {
+            char input_buf[256];
+            int 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);
+                if (code)
+                    printf ("[ERR:%s]\n", interp->result);
+                else
+                    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].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].r_handle = NULL;
+    callback_table[fd].w_handle = NULL;
+    callback_table[fd].x_handle = NULL;
+}