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-rw-r--r--unix/tkUnixEvent.c53
1 files changed, 29 insertions, 24 deletions
diff --git a/unix/tkUnixEvent.c b/unix/tkUnixEvent.c
index d15d175..758f00e 100644
--- a/unix/tkUnixEvent.c
+++ b/unix/tkUnixEvent.c
@@ -9,7 +9,7 @@
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tkUnixEvent.c,v 1.11.2.6 2006/01/20 18:42:04 jenglish Exp $
+ * RCS: @(#) $Id: tkUnixEvent.c,v 1.11.2.7 2006/12/22 19:06:12 dkf Exp $
*/
#include "tkInt.h"
@@ -466,13 +466,12 @@ DisplayFileProc(clientData, flags)
*
* TkUnixDoOneXEvent --
*
- * This routine waits for an X event to be processed or for
- * a timeout to occur. The timeout is specified as an absolute
- * time. This routine is called when Tk needs to wait for a
- * particular X event without letting arbitrary events be
- * processed. The caller will typically call Tk_RestrictEvents
- * to set up an event filter before calling this routine. This
- * routine will service at most one event per invocation.
+ * This routine waits for an X event to be processed or for a timeout to
+ * occur. The timeout is specified as an absolute time. This routine is
+ * called when Tk needs to wait for a particular X event without letting
+ * arbitrary events be processed. The caller will typically call
+ * Tk_RestrictEvents to set up an event filter before calling this
+ * routine. This routine will service at most one event per invocation.
*
* Results:
* Returns 0 if the timeout has expired, otherwise returns 1.
@@ -485,14 +484,15 @@ DisplayFileProc(clientData, flags)
int
TkUnixDoOneXEvent(timePtr)
- Tcl_Time *timePtr; /* Specifies the absolute time when the
- * call should time out. */
+ Tcl_Time *timePtr; /* Specifies the absolute time when the call
+ * should time out. */
{
TkDisplay *dispPtr;
static fd_mask readMask[MASK_SIZE];
struct timeval blockTime, *timeoutPtr;
Tcl_Time now;
- int fd, index, bit, numFound, numFdBits = 0;
+ int fd, index, numFound, numFdBits = 0;
+ fd_mask bit;
/*
* Look for queued events first.
@@ -503,9 +503,9 @@ TkUnixDoOneXEvent(timePtr)
}
/*
- * Compute the next block time and check to see if we have timed out.
- * Note that HP-UX defines tv_sec to be unsigned so we have to be
- * careful in our arithmetic.
+ * Compute the next block time and check to see if we have timed out. Note
+ * that HP-UX defines tv_sec to be unsigned so we have to be careful in
+ * our arithmetic.
*/
if (timePtr) {
@@ -528,21 +528,26 @@ TkUnixDoOneXEvent(timePtr)
}
/*
- * Set up the select mask for all of the displays. If a display has
- * data pending, then we want to poll instead of blocking.
+ * Set up the select mask for all of the displays. If a display has data
+ * pending, then we want to poll instead of blocking.
*/
memset((VOID *) readMask, 0, MASK_SIZE*sizeof(fd_mask));
for (dispPtr = TkGetDisplayList(); dispPtr != NULL;
- dispPtr = dispPtr->nextPtr) {
+ dispPtr = dispPtr->nextPtr) {
XFlush(dispPtr->display);
if (QLength(dispPtr->display) > 0) {
blockTime.tv_sec = 0;
blockTime.tv_usec = 0;
}
fd = ConnectionNumber(dispPtr->display);
+
+ /*
+ * Assume there are always at least 'fd' bits in the 'readMask' array.
+ */
+
index = fd/(NBBY*sizeof(fd_mask));
- bit = 1 << (fd%(NBBY*sizeof(fd_mask)));
+ bit = ((fd_mask)1) << (fd%(NBBY*sizeof(fd_mask)));
readMask[index] |= bit;
if (numFdBits <= fd) {
numFdBits = fd+1;
@@ -553,8 +558,8 @@ TkUnixDoOneXEvent(timePtr)
timeoutPtr);
if (numFound <= 0) {
/*
- * Some systems don't clear the masks after an error, so
- * we have to do it here.
+ * Some systems don't clear the masks after an error, so we have to do
+ * it here.
*/
memset((VOID *) readMask, 0, MASK_SIZE*sizeof(fd_mask));
@@ -565,10 +570,10 @@ TkUnixDoOneXEvent(timePtr)
*/
for (dispPtr = TkGetDisplayList(); dispPtr != NULL;
- dispPtr = dispPtr->nextPtr) {
+ dispPtr = dispPtr->nextPtr) {
fd = ConnectionNumber(dispPtr->display);
index = fd/(NBBY*sizeof(fd_mask));
- bit = 1 << (fd%(NBBY*sizeof(fd_mask)));
+ bit = ((fd_mask)1) << (fd%(NBBY*sizeof(fd_mask)));
if ((readMask[index] & bit) || (QLength(dispPtr->display) > 0)) {
DisplayFileProc((ClientData)dispPtr, TCL_READABLE);
}
@@ -590,8 +595,8 @@ TkUnixDoOneXEvent(timePtr)
}
/*
- * We had an event but we did not generate a Tcl event from it. Behave
- * as though we dealt with it. (JYL&SS)
+ * We had an event but we did not generate a Tcl event from it. Behave as
+ * though we dealt with it. (JYL&SS)
*/
return 1;