Changes for new UNIX-specific built-in module 'select' and new header for

interfaces to variants of select() system call, "myselect.h".  This includes
adding fileno() methods to files, sockets and stdwin.

Include/myselect.h

+/***********************************************************
+Copyright 1991, 1992 by Stichting Mathematisch Centrum, Amsterdam, The
+Netherlands.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its 
+documentation for any purpose and without fee is hereby granted, 
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in 
+supporting documentation, and that the names of Stichting Mathematisch
+Centrum or CWI not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior permission.
+
+STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
+THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
+FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+******************************************************************/
+
+/* Common definitions for files that use the BSD select system call.
+   This is so complicated because every UNIX variant requires that
+   you include a different set of headers.  Customizing this one file
+   should be easier than patching each of the files using select()... */
+
+
+/* XXX You may have to include some of these only if not already included */
+#include <sys/types.h>
+#include <sys/time.h> /* Implies <time.h> everywhere, as far as I know */
+#include <sys/param.h>
+
+
+/* Hacks for various systems that need hand-holding... */
+
+#ifdef _SEQUENT_
+#include <sys/select.h>
+/* Sequent doesn't seem to define struct timezone anywhere?!?! */
+struct timezone {
+    int tz_minuteswest;
+    int tz_dsttime;
+};
+#endif
+
+#ifdef _AIX /* I *think* this works */
+/* AIX defines fd_set in a separate file.  Sigh... */
+#include <sys/select.h>
+#endif
+
+
+
+/* (Very) old versions of BSD don't define the FD_* set of macros.
+   The following will usually do... */
+
+#ifndef	FD_SETSIZE
+#define	FD_SETSIZE	256
+#endif
+
+#ifndef FD_SET
+
+typedef long	fd_mask;
+
+#define NFDBITS	(sizeof(fd_mask) * NBBY)	/* bits per mask */
+#ifndef howmany
+#define	howmany(x, y)	(((x)+((y)-1))/(y))
+#endif
+
+typedef	struct fd_set {
+	fd_mask	fds_bits[howmany(FD_SETSIZE, NFDBITS)];
+} fd_set;
+
+#define	FD_SET(n, p)	((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
+#define	FD_CLR(n, p)	((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
+#define	FD_ISSET(n, p)	((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
+#define FD_ZERO(p)	bzero((char *)(p), sizeof(*(p)))
+
+#endif /* FD_SET */

Modules/config.c.in

@@ -34,7 +34,7 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #ifdef __DATE__
 #define DATE __DATE__
 #else
-#define DATE ">= 3 Jun 1992"
+#define DATE ">= 23 Jun 1992"
 #endif
 
 #include <stdio.h>
@@ -122,6 +122,7 @@ extern void initposix();
 extern void initpwd();
 extern void initgrp();
 extern void initmarshal();
+extern void initselect();
 
 #ifdef USE_AUDIO
 extern void initaudio();
@@ -171,6 +172,7 @@ struct {
 	{"pwd",		initpwd},
 	{"grp",		initgrp},
 	{"marshal",	initmarshal},
+	{"select",	initselect},
 
 
 	/* Optional modules */

Modules/selectmodule.c

+/***********************************************************
+Copyright 1991, 1992 by Stichting Mathematisch Centrum, Amsterdam, The
+Netherlands.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its 
+documentation for any purpose and without fee is hereby granted, 
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in 
+supporting documentation, and that the names of Stichting Mathematisch
+Centrum or CWI not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior permission.
+
+STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
+THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
+FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+******************************************************************/
+
+/* select - Module containing unix select(2) call */
+
+#include "allobjects.h"
+#include "modsupport.h"
+#include "compile.h"
+#include "ceval.h"
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/param.h>
+
+/* XXX Maybe you need to define the FD_* macros here when porting this code */
+
+static object *SelectError;
+
+/* XXX This module should be re-entrant! */
+static object *fd2obj[FD_SETSIZE];
+
+static
+list2set(list, set)
+    object *list;
+    fd_set *set;
+{
+    int i, len, v, max=-1;
+    object *o, *filenomethod, *fno;
+    
+    FD_ZERO(set);
+    len = getlistsize(list);
+    for( i=0; i<len; i++ ) {
+	o = getlistitem(list, i);
+	if ( is_intobject(o) ) {
+	    v = getintvalue(o);
+	} else if ( (filenomethod = getattr(o, "fileno")) != NULL ) {
+	    fno = call_object(filenomethod, NULL);
+	    if ( fno == NULL )
+		return -1;
+	    if ( !is_intobject(fno) ) {
+		err_badarg();
+		return -1;
+	    }
+	    v = getintvalue(fno);
+	    DECREF(fno);
+	} else {
+	    err_badarg();
+	    return -1;
+	}
+	if ( v >= FD_SETSIZE ) {
+	    err_setstr(SystemError, "FD_SETSIZE too low in select()");
+	    return -1;
+	}
+	if ( v > max ) max = v;
+	FD_SET(v, set);
+	fd2obj[v] = o;
+    }
+    return max+1;
+}
+
+static object *
+set2list(set, max)
+    fd_set *set;
+    int max;
+{
+    int i, num=0;
+    object *list, *o;
+
+    for(i=0; i<max; i++)
+      if ( FD_ISSET(i,set) )
+	num++;
+    list = newlistobject(num);
+    num = 0;
+    for(i=0; i<max; i++)
+      if ( FD_ISSET(i,set) ) {
+	  if ( i > FD_SETSIZE ) {
+	      err_setstr(SystemError, "FD_SETSIZE too low in select()");
+	      return NULL;
+	  }
+	  o = fd2obj[i];
+	  if ( o == 0 ) {
+	      err_setstr(SystemError,
+			 "Bad filedescriptor returned from select()");
+	      return NULL;
+	  }
+	  INCREF(o);
+	  setlistitem(list, num, o);
+	  num++;
+    }
+    return list;
+}
+    
+static object *
+select_select(self, args)
+    object *self;
+    object *args;
+{
+    object *ifdlist, *ofdlist, *efdlist;
+    fd_set ifdset, ofdset, efdset;
+    double timeout;
+    struct timeval tv, *tvp;
+    int seconds;
+    int imax, omax, emax, max;
+    int n;
+
+
+    /* Get args. Looks funny because of optional timeout argument */
+    if ( getargs(args, "(OOOd)", &ifdlist, &ofdlist, &efdlist, &timeout) ) {
+	seconds = (int)timeout;
+	timeout = timeout - (double)seconds;
+	tv.tv_sec = seconds;
+	tv.tv_usec = (int)(timeout*1000000.0);
+	tvp = &tv;
+    } else {
+	/* Doesn't have 4 args, that means no timeout */
+	err_clear();
+	if (!getargs(args, "(OOO)", &ifdlist, &ofdlist, &efdlist) )
+	  return 0;
+	tvp = (struct timeval *)0;
+    }
+    if ( !is_listobject(ifdlist) || !is_listobject(ofdlist) ||
+	!is_listobject(efdlist) ) {
+	err_badarg();
+	return 0;
+    }
+
+    bzero((char *)fd2obj, sizeof(fd2obj)); /* Not really needed */
+    
+    /* Convert lists to fd_sets, and get maximum fd number */
+    if( (imax=list2set(ifdlist, &ifdset)) < 0 )
+      return 0;
+    if( (omax=list2set(ofdlist, &ofdset)) < 0 )
+      return 0;
+    if( (emax=list2set(efdlist, &efdset)) < 0 )
+      return 0;
+    max = imax;
+    if ( omax > max ) max = omax;
+    if ( emax > max ) max = emax;
+
+    n = select(max, &ifdset, &ofdset, &efdset, tvp);
+
+    if ( n < 0 ) {
+	err_errno(SelectError);
+	return 0;
+    }
+
+    if ( n == 0 )
+      imax = omax = emax = 0; /* Speedup hack */
+
+    ifdlist = set2list(&ifdset, imax);
+    ofdlist = set2list(&ofdset, omax);
+    efdlist = set2list(&efdset, emax);
+
+    return mkvalue("OOO", ifdlist, ofdlist, efdlist);
+}
+
+
+static struct methodlist select_methods[] = {
+    { "select",	select_select },
+    { 0,	0 },
+};
+
+
+void
+initselect()
+{
+	object *m, *d;
+	m = initmodule("select", select_methods);
+	d = getmoduledict(m);
+	SelectError = newstringobject("select.error");
+	if ( SelectError == NULL || dictinsert(d, "error", SelectError) )
+	  fatal("Cannot define select.error");
+}

Modules/socketmodule.c

@@ -73,17 +73,13 @@ Socket methods:
 #include "allobjects.h"
 #include "modsupport.h"
 
+#include "myselect.h" /* Implies <sys/types.h>, <sys/time.h>, <sys/param.h> */
+
 #include <signal.h>
-#include <sys/types.h>
 #include <sys/socket.h>
-#include <sys/time.h> /* Needed for struct timeval */
 #include <netinet/in.h>
 #include <sys/un.h>
 #include <netdb.h>
-#ifdef _AIX /* I *think* this works */
-/* AIX defines fd_set in a separate file.  Sigh... */
-#include <sys/select.h>
-#endif
 
 
 /* Global variable holding the exception type for errors detected
@@ -526,6 +522,19 @@ sock_connect(s, args)
 }
 
 
+/* s.fileno() method */
+
+static object *
+sock_fileno(s, args)
+	sockobject *s;
+	object *args;
+{
+	if (!getnoarg(args))
+		return NULL;
+	return newintobject((long) s->sock_fd);
+}
+
+
 /* s.listen(n) method */
 
 static object *
@@ -699,6 +708,7 @@ static struct methodlist sock_methods[] = {
 	{"bind",	sock_bind},
 	{"close",	sock_close},
 	{"connect",	sock_connect},
+	{"fileno",	sock_fileno},
 	{"listen",	sock_listen},
 	{"makefile",	sock_makefile},
 	{"recv",	sock_recv},

Modules/stdwinmodule.c

@@ -2102,11 +2102,27 @@ stdwin_getscrmm(self, args)
 	return makepoint(width, height);
 }
 
+#ifdef unix
+static object *
+stdwin_connectionnumber(self, args)
+	object *self;
+	object *args;
+{
+	if (!getnoarg(args))
+		return NULL;
+	return newintobject((long) wconnectionnumber());
+}
+#endif
+
 static struct methodlist stdwin_methods[] = {
 	{"askfile",		stdwin_askfile},
 	{"askstr",		stdwin_askstr},
 	{"askync",		stdwin_askync},
 	{"fetchcolor",		stdwin_fetchcolor},
+#ifdef unix
+	{"fileno",		stdwin_connectionnumber},
+	{"connectionnumber",	stdwin_connectionnumber},
+#endif
 	{"fleep",		stdwin_fleep},
 	{"getactive",		stdwin_getactive},
 	{"getcutbuffer",	stdwin_getcutbuffer},

Modules/timemodule.c

@@ -68,14 +68,6 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #include <errno.h>
 #endif
 
-#ifdef _SEQUENT_
-#include <sys/select.h>
-struct timezone {
-    int tz_minuteswest;
-    int tz_dsttime;
-};
-#endif
-
 /* Time methods */
 
 static object *
@@ -285,10 +277,7 @@ millitimer()
 
 #ifdef BSD_TIME
 
-#ifdef _AIX /* I *think* this works */
-/* AIX defines fd_set in a separate file.  Sigh... */
-#include <sys/select.h>
-#endif
+#include "myselect.h" /* Implies <sys/types.h>, <sys/time.h>, <sys/param.h> */
 
 long
 millitimer()

Objects/fileobject.c

@@ -221,6 +221,16 @@ file_tell(f, args)
 	return newintobject(offset);
 }
 
+static object *
+file_fileno(f, args)
+	fileobject *f;
+	object *args;
+{
+	if (!getnoarg(args))
+		return NULL;
+	return newintobject((long) fileno(f->f_fp));
+}
+
 static object *
 file_flush(f, args)
 	fileobject *f;
@@ -462,6 +472,7 @@ file_write(f, args)
 static struct methodlist file_methods[] = {
 	{"close",	file_close},
 	{"flush",	file_flush},
+	{"fileno",	file_fileno},
 	{"isatty",	file_isatty},
 	{"read",	file_read},
 	{"readline",	file_readline},