Skip to content

Commit c84e42a

Browse files
DJm00nDJm00n
authored
Extract CM_Get_DevNode_PropertyW() and CM_Get_Device_Interface_PropertyW() calls to separate functions (#372)
1 parent 2551a5d commit c84e42a

File tree

2 files changed

+72
-51
lines changed

2 files changed

+72
-51
lines changed

‎windows/hid.c‎

Lines changed: 59 additions & 51 deletions
Original file line numberDiff line numberDiff line change
@@ -302,46 +302,74 @@ int HID_API_EXPORT hid_exit(void)
302302
return 0;
303303
}
304304

305-
static void hid_internal_get_ble_info(struct hid_device_info* dev, DEVINST dev_node)
305+
static void* hid_internal_get_devnode_property(DEVINST dev_node, const DEVPROPKEY* property_key, DEVPROPTYPE expected_property_type)
306306
{
307-
ULONG len;
307+
ULONG len = 0;
308308
CONFIGRET cr;
309309
DEVPROPTYPE property_type;
310+
PBYTE property_value = NULL;
311+
312+
cr = CM_Get_DevNode_PropertyW(dev_node, property_key, &property_type, NULL, &len, 0);
313+
if (cr != CR_BUFFER_SMALL || property_type != expected_property_type)
314+
return NULL;
315+
316+
property_value = (PBYTE)calloc(len, sizeof(BYTE));
317+
cr = CM_Get_DevNode_PropertyW(dev_node, property_key, &property_type, property_value, &len, 0);
318+
if (cr != CR_SUCCESS) {
319+
free(property_value);
320+
return NULL;
321+
}
322+
323+
return property_value;
324+
}
325+
326+
static void* hid_internal_get_device_interface_property(const wchar_t* interface_path, const DEVPROPKEY* property_key, DEVPROPTYPE expected_property_type)
327+
{
328+
ULONG len = 0;
329+
CONFIGRET cr;
330+
DEVPROPTYPE property_type;
331+
PBYTE property_value = NULL;
332+
333+
cr = CM_Get_Device_Interface_PropertyW(interface_path, property_key, &property_type, NULL, &len, 0);
334+
if (cr != CR_BUFFER_SMALL || property_type != expected_property_type)
335+
return NULL;
336+
337+
property_value = (PBYTE)calloc(len, sizeof(BYTE));
338+
cr = CM_Get_Device_Interface_PropertyW(interface_path, property_key, &property_type, property_value, &len, 0);
339+
if (cr != CR_SUCCESS) {
340+
free(property_value);
341+
return NULL;
342+
}
310343

311-
static DEVPROPKEY DEVPKEY_NAME = { { 0xb725f130, 0x47ef, 0x101a, 0xa5, 0xf1, 0x02, 0x60, 0x8c, 0x9e, 0xeb, 0xac }, 10 }; /* DEVPROP_TYPE_STRING */
312-
static DEVPROPKEY PKEY_DeviceInterface_Bluetooth_DeviceAddress = { { 0x2bd67d8b, 0x8beb, 0x48d5, 0x87, 0xe0, 0x6c, 0xda, 0x34, 0x28, 0x04, 0x0a }, 1 }; /* DEVPROP_TYPE_STRING */
313-
static DEVPROPKEY PKEY_DeviceInterface_Bluetooth_Manufacturer = { { 0x2bd67d8b, 0x8beb, 0x48d5, 0x87, 0xe0, 0x6c, 0xda, 0x34, 0x28, 0x04, 0x0a }, 4 }; /* DEVPROP_TYPE_STRING */
344+
return property_value;
345+
}
314346

347+
static void hid_internal_get_ble_info(struct hid_device_info* dev, DEVINST dev_node)
348+
{
349+
wchar_t *manufacturer_string, *serial_number, *product_string;
315350
/* Manufacturer String */
316-
len = 0;
317-
cr = CM_Get_DevNode_PropertyW(dev_node, &PKEY_DeviceInterface_Bluetooth_Manufacturer, &property_type, NULL, &len, 0);
318-
if (cr == CR_BUFFER_SMALL && property_type == DEVPROP_TYPE_STRING) {
351+
manufacturer_string = hid_internal_get_devnode_property(dev_node, (const DEVPROPKEY*)&PKEY_DeviceInterface_Bluetooth_Manufacturer, DEVPROP_TYPE_STRING);
352+
if (manufacturer_string) {
319353
free(dev->manufacturer_string);
320-
dev->manufacturer_string = (wchar_t*)calloc(len, sizeof(BYTE));
321-
CM_Get_DevNode_PropertyW(dev_node, &PKEY_DeviceInterface_Bluetooth_Manufacturer, &property_type, (PBYTE)dev->manufacturer_string, &len, 0);
354+
dev->manufacturer_string = manufacturer_string;
322355
}
323356

324357
/* Serial Number String (MAC Address) */
325-
len = 0;
326-
cr = CM_Get_DevNode_PropertyW(dev_node, &PKEY_DeviceInterface_Bluetooth_DeviceAddress, &property_type, NULL, &len, 0);
327-
if (cr == CR_BUFFER_SMALL && property_type == DEVPROP_TYPE_STRING) {
358+
serial_number = hid_internal_get_devnode_property(dev_node, (const DEVPROPKEY*)&PKEY_DeviceInterface_Bluetooth_DeviceAddress, DEVPROP_TYPE_STRING);
359+
if (serial_number) {
328360
free(dev->serial_number);
329-
dev->serial_number = (wchar_t*)calloc(len, sizeof(BYTE));
330-
CM_Get_DevNode_PropertyW(dev_node, &PKEY_DeviceInterface_Bluetooth_DeviceAddress, &property_type, (PBYTE)dev->serial_number, &len, 0);
361+
dev->serial_number = serial_number;
331362
}
332363

333364
/* Get devnode grandparent to reach out Bluetooth LE device node */
334-
cr = CM_Get_Parent(&dev_node, dev_node, 0);
335-
if (cr != CR_SUCCESS)
365+
if (CM_Get_Parent(&dev_node, dev_node, 0) != CR_SUCCESS)
336366
return;
337367

338368
/* Product String */
339-
len = 0;
340-
cr = CM_Get_DevNode_PropertyW(dev_node, &DEVPKEY_NAME, &property_type, NULL, &len, 0);
341-
if (cr == CR_BUFFER_SMALL && property_type == DEVPROP_TYPE_STRING) {
369+
product_string = hid_internal_get_devnode_property(dev_node, &DEVPKEY_NAME, DEVPROP_TYPE_STRING);
370+
if (product_string) {
342371
free(dev->product_string);
343-
dev->product_string = (wchar_t*)calloc(len, sizeof(BYTE));
344-
CM_Get_DevNode_PropertyW(dev_node, &DEVPKEY_NAME, &property_type, (PBYTE)dev->product_string, &len, 0);
372+
dev->product_string = product_string;
345373
}
346374
}
347375

@@ -373,23 +401,12 @@ static int hid_internal_get_interface_number(const wchar_t* hardware_id)
373401
static void hid_internal_get_info(const wchar_t* interface_path, struct hid_device_info* dev)
374402
{
375403
wchar_t *device_id = NULL, *compatible_ids = NULL, *hardware_ids = NULL;
376-
ULONG len;
377404
CONFIGRET cr;
378-
DEVPROPTYPE property_type;
379405
DEVINST dev_node;
380406

381-
static DEVPROPKEY DEVPKEY_Device_InstanceId = { { 0x78c34fc8, 0x104a, 0x4aca, 0x9e, 0xa4, 0x52, 0x4d, 0x52, 0x99, 0x6e, 0x57 }, 256 }; /* DEVPROP_TYPE_STRING */
382-
static DEVPROPKEY DEVPKEY_Device_HardwareIds = { { 0xa45c254e, 0xdf1c, 0x4efd, 0x80, 0x20, 0x67, 0xd1, 0x46, 0xa8, 0x50, 0xe0}, 3 }; /* DEVPROP_TYPE_STRING_LIST */
383-
static DEVPROPKEY DEVPKEY_Device_CompatibleIds = { { 0xa45c254e, 0xdf1c, 0x4efd, 0x80, 0x20, 0x67, 0xd1, 0x46, 0xa8, 0x50, 0xe0}, 4 }; /* DEVPROP_TYPE_STRING_LIST */
384-
385407
/* Get the device id from interface path */
386-
len = 0;
387-
cr = CM_Get_Device_Interface_PropertyW(interface_path, &DEVPKEY_Device_InstanceId, &property_type, NULL, &len, 0);
388-
if (cr == CR_BUFFER_SMALL && property_type == DEVPROP_TYPE_STRING) {
389-
device_id = (wchar_t*)calloc(len, sizeof(BYTE));
390-
cr = CM_Get_Device_Interface_PropertyW(interface_path, &DEVPKEY_Device_InstanceId, &property_type, (PBYTE)device_id, &len, 0);
391-
}
392-
if (cr != CR_SUCCESS)
408+
device_id = hid_internal_get_device_interface_property(interface_path, &DEVPKEY_Device_InstanceId, DEVPROP_TYPE_STRING);
409+
if (!device_id)
393410
goto end;
394411

395412
/* Open devnode from device id */
@@ -398,13 +415,8 @@ static void hid_internal_get_info(const wchar_t* interface_path, struct hid_devi
398415
goto end;
399416

400417
/* Get the hardware ids from devnode */
401-
len = 0;
402-
cr = CM_Get_DevNode_PropertyW(dev_node, &DEVPKEY_Device_HardwareIds, &property_type, NULL, &len, 0);
403-
if (cr == CR_BUFFER_SMALL && property_type == DEVPROP_TYPE_STRING_LIST) {
404-
hardware_ids = (wchar_t*)calloc(len, sizeof(BYTE));
405-
cr = CM_Get_DevNode_PropertyW(dev_node, &DEVPKEY_Device_HardwareIds, &property_type, (PBYTE)hardware_ids, &len, 0);
406-
}
407-
if (cr != CR_SUCCESS)
418+
hardware_ids = hid_internal_get_devnode_property(dev_node, &DEVPKEY_Device_HardwareIds, DEVPROP_TYPE_STRING_LIST);
419+
if (!hardware_ids)
408420
goto end;
409421

410422
/* Search for interface number in hardware ids */
@@ -424,13 +436,8 @@ static void hid_internal_get_info(const wchar_t* interface_path, struct hid_devi
424436
goto end;
425437

426438
/* Get the compatible ids from parent devnode */
427-
len = 0;
428-
cr = CM_Get_DevNode_PropertyW(dev_node, &DEVPKEY_Device_CompatibleIds, &property_type, NULL, &len, 0);
429-
if (cr == CR_BUFFER_SMALL && property_type == DEVPROP_TYPE_STRING_LIST) {
430-
compatible_ids = (wchar_t*)calloc(len, sizeof(BYTE));
431-
cr = CM_Get_DevNode_PropertyW(dev_node, &DEVPKEY_Device_CompatibleIds, &property_type, (PBYTE)compatible_ids, &len, 0);
432-
}
433-
if (cr != CR_SUCCESS)
439+
compatible_ids = hid_internal_get_devnode_property(dev_node, &DEVPKEY_Device_CompatibleIds, DEVPROP_TYPE_STRING_LIST);
440+
if (!compatible_ids)
434441
goto end;
435442

436443
/* Now we can parse parent's compatible IDs to find out the device bus type */
@@ -591,7 +598,9 @@ struct hid_device_info HID_API_EXPORT * HID_API_CALL hid_enumerate(unsigned shor
591598

592599
/* Get the Vendor ID and Product ID for this device. */
593600
attrib.Size = sizeof(HIDD_ATTRIBUTES);
594-
HidD_GetAttributes(device_handle, &attrib);
601+
if (!HidD_GetAttributes(device_handle, &attrib)) {
602+
goto cont_close;
603+
}
595604

596605
/* Check the VID/PID to see if we should add this
597606
device to the enumeration list. */
@@ -639,7 +648,6 @@ void HID_API_EXPORT HID_API_CALL hid_free_enumeration(struct hid_device_info *d
639648
}
640649
}
641650

642-
643651
HID_API_EXPORT hid_device * HID_API_CALL hid_open(unsigned short vendor_id, unsigned short product_id, const wchar_t *serial_number)
644652
{
645653
/* TODO: Merge this functions with the Linux version. This function should be platform independent. */

‎windows/hidapi_cfgmgr32.h‎

Lines changed: 13 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -23,6 +23,9 @@
2323
#ifdef HIDAPI_USE_DDK
2424

2525
#include <cfgmgr32.h>
26+
#include <initguid.h>
27+
#include <devpkey.h>
28+
#include <propkey.h>
2629

2730
#else
2831

@@ -49,6 +52,16 @@ typedef CONFIGRET(__stdcall* CM_Get_Device_Interface_PropertyW_)(LPCWSTR pszDevi
4952
typedef CONFIGRET(__stdcall* CM_Get_Device_Interface_List_SizeW_)(PULONG pulLen, LPGUID InterfaceClassGuid, DEVINSTID_W pDeviceID, ULONG ulFlags);
5053
typedef CONFIGRET(__stdcall* CM_Get_Device_Interface_ListW_)(LPGUID InterfaceClassGuid, DEVINSTID_W pDeviceID, PZZWSTR Buffer, ULONG BufferLen, ULONG ulFlags);
5154

55+
// from devpkey.h
56+
static DEVPROPKEY DEVPKEY_NAME = { { 0xb725f130, 0x47ef, 0x101a, 0xa5, 0xf1, 0x02, 0x60, 0x8c, 0x9e, 0xeb, 0xac }, 10 }; // DEVPROP_TYPE_STRING
57+
static DEVPROPKEY DEVPKEY_Device_InstanceId = { { 0x78c34fc8, 0x104a, 0x4aca, 0x9e, 0xa4, 0x52, 0x4d, 0x52, 0x99, 0x6e, 0x57 }, 256 }; // DEVPROP_TYPE_STRING
58+
static DEVPROPKEY DEVPKEY_Device_HardwareIds = { { 0xa45c254e, 0xdf1c, 0x4efd, 0x80, 0x20, 0x67, 0xd1, 0x46, 0xa8, 0x50, 0xe0}, 3 }; // DEVPROP_TYPE_STRING_LIST
59+
static DEVPROPKEY DEVPKEY_Device_CompatibleIds = { { 0xa45c254e, 0xdf1c, 0x4efd, 0x80, 0x20, 0x67, 0xd1, 0x46, 0xa8, 0x50, 0xe0}, 4 }; // DEVPROP_TYPE_STRING_LIST
60+
61+
// from propkey.h
62+
static PROPERTYKEY PKEY_DeviceInterface_Bluetooth_DeviceAddress = { { 0x2bd67d8b, 0x8beb, 0x48d5, 0x87, 0xe0, 0x6c, 0xda, 0x34, 0x28, 0x04, 0x0a }, 1 }; // DEVPROP_TYPE_STRING
63+
static PROPERTYKEY PKEY_DeviceInterface_Bluetooth_Manufacturer = { { 0x2bd67d8b, 0x8beb, 0x48d5, 0x87, 0xe0, 0x6c, 0xda, 0x34, 0x28, 0x04, 0x0a }, 4 }; // DEVPROP_TYPE_STRING
64+
5265
#endif
5366

5467
#endif /* HIDAPI_CFGMGR32_H */

0 commit comments

Comments
 (0)