Redline/HID_Config_Utilities.c

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/*
File: HID_Config_Utilities.c
Contains: Implementation of the HID configuration utilities for the HID utilities.
DRI: George Warner
Copyright: Copyright <EFBFBD> 2002 Apple Computer, Inc., All Rights Reserved
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc.
("Apple") in consideration of your agreement to the following terms, and your
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please do not use, install, modify or redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and subject
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Apple Software without specific prior written permission from Apple. Except as
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*/
#include <stdlib.h> // malloc
#include <time.h> // clock
#include <IOKit/hid/IOHIDUsageTables.h>
#include "HID_Utilities_Internal.h"
#include "HID_Utilities_External.h"
// ---------------------------------
// polls all devices and elements for a change greater than kPercentMove. Times out after given time
// returns 1 and pointer to device and element if found
// returns 0 and NULL for both parameters if not found
unsigned char HIDConfigureAction (pRecDevice * ppDevice, pRecElement * ppElement, float timeout)
{
long numDevices, maxElements = 0;
long * saveValueArray;
pRecDevice pDevice = NULL;
pRecElement pElement = NULL;
short deviceNum = 0;
unsigned char found = 0, done = 0;
clock_t start = clock (), end;
if (!HIDHaveDeviceList ()) // if we do not have a device list
if (0 == HIDBuildDeviceList (kHIDPage_GenericDesktop, 0)) // if we could not build another list (use generic page)
return 0; // return 0
// build list of device and elements to save current values
numDevices = HIDCountDevices ();
pDevice = HIDGetFirstDevice ();
while (pDevice)
{
long numElements = HIDCountDeviceElements (pDevice, kHIDElementTypeInput);
if (numElements > maxElements)
maxElements = numElements;
pDevice = HIDGetNextDevice (pDevice);
}
saveValueArray = (long *) malloc (sizeof (long) * numDevices * maxElements); // 2D array to save values
bzero(saveValueArray,sizeof (long) * numDevices * maxElements); // clear array
// store current values
deviceNum = 0;
pDevice = HIDGetFirstDevice ();
while (pDevice)
{
short elementNum = 0;
pElement = HIDGetFirstDeviceElement (pDevice, kHIDElementTypeInput);
while (pElement)
{
*(saveValueArray + (deviceNum * maxElements) + elementNum) = HIDGetElementValue (pDevice, pElement);
pElement = HIDGetNextDeviceElement (pElement, kHIDElementTypeInput);
elementNum++;
}
pDevice = HIDGetNextDevice (pDevice);
deviceNum++;
}
// poll all devices and elements, compare current value to save +/- kPercentMove
while ((!found) && (!done))
{
double secs;
// are we done?
end = clock();
secs = (double)(end - start) / CLOCKS_PER_SEC;
if (secs > timeout)
done = 1;
deviceNum = 0;
pDevice = HIDGetFirstDevice ();
while (pDevice)
{
short elementNum = 0;
pElement = HIDGetFirstDeviceElement (pDevice, kHIDElementTypeInput);
while (pElement)
{
// ignore force feedback devices AND arrays
if ((kHIDPage_PID != pElement->usagePage) && (-1 != pElement->usage))
{
long initialValue = *(saveValueArray + (deviceNum * maxElements) + elementNum);
long value = HIDGetElementValue (pDevice, pElement);
long delta = (float)(pElement->max - pElement->min) * kPercentMove * 0.01;
if (((initialValue + delta) < value) || ((initialValue - delta) > value))
{
found = 1;
break;
}
}
pElement = HIDGetNextDeviceElement (pElement, kHIDElementTypeInput);
elementNum++;
}
if (found)
break;
pDevice = HIDGetNextDevice (pDevice);
deviceNum++;
}
}
// return device and element moved
if (found)
{
*ppDevice = pDevice;
*ppElement = pElement;
return 1;
}
else
{
*ppDevice = NULL;
*ppElement = NULL;
return 0;
}
}
// ---------------------------------
// takes input records, save required info
// assume file is open and at correct position.
// will always write to file (if file exists) size of recSaveHID, even if device and or element is bad
void HIDSaveElementConfig (FILE * fileRef, pRecDevice pDevice, pRecElement pElement, long actionCookie)
{
recSaveHID saveRec;
if (HIDIsValidElement(pDevice,pElement))
{
// clear rec
bzero(&saveRec,sizeof(recSaveHID));
saveRec.actionCookie = actionCookie;
// must save
// actionCookie
// Device: serial,vendorID, productID, location, usagePage, usage
// Element: cookie, usagePage, usage,
// need to add serial number when I have a test case
saveRec.vendorID = pDevice->vendorID;
saveRec.productID = pDevice->productID;
saveRec.locID = pDevice->locID;
saveRec.usage = pDevice->usage;
saveRec.usagePage = pDevice->usagePage;
saveRec.usagePageE = pElement->usagePage;
saveRec.usageE = pElement->usage;
saveRec.cookie = pElement->cookie;
// write to file
if (fileRef)
fwrite ((void *)&saveRec, sizeof (recSaveHID), 1, fileRef);
}
}
// ---------------------------------
// take file, read one record (assume file position is correct and file is open)
// search for matching device
// return pDevice, pElement and cookie for action
long HIDRestoreElementConfig (FILE * fileRef, pRecDevice * ppDevice, pRecElement * ppElement)
{
// Device: serial,vendorID, productID, location, usagePage, usage
// Element: cookie, usagePage, usage,
pRecDevice pDevice, pFoundDevice = NULL;
pRecElement pElement, pFoundElement = NULL;
recSaveHID restoreRec;
fread ((void *) &restoreRec, 1, sizeof (recSaveHID), fileRef);
// compare to current device list for matches
// look for device
if (restoreRec.locID && restoreRec.vendorID && restoreRec.productID)
{ // look for specific device type plug in to same port
pDevice = HIDGetFirstDevice ();
while (pDevice)
{
if ((restoreRec.locID == pDevice->locID) &&
(restoreRec.vendorID == pDevice->vendorID) &&
(restoreRec.productID == pDevice->productID))
pFoundDevice = pDevice;
if (pFoundDevice)
break;
pDevice = HIDGetNextDevice (pDevice);
}
if (pFoundDevice)
{
pElement = HIDGetFirstDeviceElement (pFoundDevice, kHIDElementTypeIO);
while (pElement)
{
if (restoreRec.cookie == pElement->cookie)
pFoundElement = pElement;
if (pFoundElement)
break;
pElement = HIDGetNextDeviceElement (pElement, kHIDElementTypeIO);
}
// if no cookie match (should NOT occur) match on usage
pElement = HIDGetFirstDeviceElement (pFoundDevice, kHIDElementTypeIO);
while (pElement)
{
if ((restoreRec.usageE == pElement->usage) &&
(restoreRec.usagePageE == pElement->usagePage))
pFoundElement = pElement;
if (pFoundElement)
break;
pElement = HIDGetNextDeviceElement (pElement, kHIDElementTypeIO);
}
}
}
// if we have not found a match, look at just vendor and product
if ((NULL == pFoundDevice) &&
(restoreRec.vendorID && restoreRec.productID))
{
pDevice = HIDGetFirstDevice ();
while (pDevice)
{
if ((restoreRec.vendorID == pDevice->vendorID) &&
(restoreRec.productID == pDevice->productID))
pFoundDevice = pDevice;
if (pFoundDevice)
break;
pDevice = HIDGetNextDevice (pDevice);
}
// match elements by cookie since same device type
if (pFoundDevice)
{
pElement = HIDGetFirstDeviceElement (pFoundDevice, kHIDElementTypeIO);
while (pElement)
{
if (restoreRec.cookie == pElement->cookie)
pFoundElement = pElement;
if (pFoundElement)
break;
pElement = HIDGetNextDeviceElement (pElement, kHIDElementTypeIO);
}
// if no cookie match (should NOT occur) match on usage
pElement = HIDGetFirstDeviceElement (pFoundDevice, kHIDElementTypeIO);
while (pElement)
{
if ((restoreRec.usageE == pElement->usage) &&
(restoreRec.usagePageE == pElement->usagePage))
pFoundElement = pElement;
if (pFoundElement)
break;
pElement = HIDGetNextDeviceElement (pElement, kHIDElementTypeIO);
}
}
}
// if we have not found a match look for just same type of device
if ((NULL == pFoundDevice) && (restoreRec.usage && restoreRec.usagePage))
{
pDevice = HIDGetFirstDevice ();
while (pDevice)
{
if ((restoreRec.usage == pDevice->usage) && (restoreRec.usagePage == pDevice->usagePage))
pFoundDevice = pDevice;
if (pFoundDevice)
break;
pDevice = HIDGetNextDevice (pDevice);
}
// match elements by type
if (pFoundDevice)
{
pElement = HIDGetFirstDeviceElement (pFoundDevice, kHIDElementTypeIO);
while (pElement)
{
if ((restoreRec.usageE == pElement->usage) &&
(restoreRec.usagePageE == pElement->usagePage))
pFoundElement = pElement;
if (pFoundElement)
break;
pElement = HIDGetNextDeviceElement (pElement, kHIDElementTypeIO);
}
}
}
// if still not found just get first device
if (NULL == pFoundDevice)
{
pFoundDevice = HIDGetFirstDevice ();
// match elements by type
if (pFoundDevice)
{
pElement = HIDGetFirstDeviceElement (pFoundDevice, kHIDElementTypeIO);
while (pElement)
{
if ((restoreRec.usageE == pElement->usage) &&
(restoreRec.usagePageE == pElement->usagePage))
pFoundElement = pElement;
if (pFoundElement)
break;
pElement = HIDGetNextDeviceElement (pElement, kHIDElementTypeIO);
}
}
}
if ((NULL == pFoundDevice) || (NULL == pFoundElement))
{
// no HID device
*ppDevice = NULL;
*ppElement = NULL;
return restoreRec.actionCookie;
}
else
{
// no HID device
*ppDevice = pFoundDevice;
*ppElement = pFoundElement;
return restoreRec.actionCookie;
}
}
// ---------------------------------
// Find the specified preference in the specified application
// search for matching device and element
// return pDevice, pElement that matches
Boolean HIDRestoreElementPref (CFStringRef keyCFStringRef, CFStringRef appCFStringRef, pRecDevice * ppDevice, pRecElement * ppElement)
{
Boolean found = false;
if ((NULL != keyCFStringRef) && (NULL != appCFStringRef) && (NULL != ppDevice) && (NULL != ppElement))
{
CFPropertyListRef prefCFPropertyListRef = CFPreferencesCopyAppValue(keyCFStringRef, appCFStringRef);
if (NULL != prefCFPropertyListRef)
{
if (CFStringGetTypeID() == CFGetTypeID(prefCFPropertyListRef))
{
char buffer[256];
if (CFStringGetCString((CFStringRef) prefCFPropertyListRef, buffer, sizeof(buffer), kCFStringEncodingASCII))
{
recDevice searchDevice;
recElement searchElement;
int count = sscanf(buffer, "d:{v:%ld, p:%ld, l:%ld, p:%ld, u:%ld}, e:{t:%ld, p:%ld, u:%ld, c:%ld}",
&searchDevice.vendorID, &searchDevice.productID, &searchDevice.locID, &searchDevice.usagePage, &searchDevice.usage,
&searchElement.type, &searchElement.usagePage, &searchElement.usage, (long*) &searchElement.cookie);
if (9 == count) // if we found all nine parameters<72>
{ // and can find a device & element that matches these<73>
if (HIDFindActionDeviceAndElement(&searchDevice, &searchElement,ppDevice, ppElement))
{
found = true;
}
}
}
}
else
{
// We found the entry with this key but it's the wrong type; delete it.
CFPreferencesSetAppValue(keyCFStringRef, NULL, appCFStringRef);
(void) CFPreferencesAppSynchronize(appCFStringRef);
}
CFRelease(prefCFPropertyListRef);
}
}
return found;
}
// ---------------------------------
// Save the device & element values into the specified key in the specified applications preferences
Boolean HIDSaveElementPref (const CFStringRef keyCFStringRef, CFStringRef appCFStringRef, pRecDevice pDevice, pRecElement pElement)
{
Boolean success = false;
if ((NULL != keyCFStringRef) && (NULL != appCFStringRef) && HIDIsValidElement(pDevice,pElement))
{
CFStringRef prefCFStringRef =
CFStringCreateWithFormat(kCFAllocatorDefault, NULL, CFSTR("d:{v:%ld, p:%ld, l:%ld, p:%ld, u:%ld}, e:{t:%ld, p:%ld, u:%ld, c:%ld}"),
pDevice->vendorID, pDevice->productID, pDevice->locID, pDevice->usagePage, pDevice->usage,
pElement->type, pElement->usagePage, pElement->usage, pElement->cookie);
if (NULL != prefCFStringRef)
{
CFPreferencesSetAppValue(keyCFStringRef, prefCFStringRef, kCFPreferencesCurrentApplication);
CFRelease(prefCFStringRef);
success = true;
}
}
return success;
}