2919 lines
75 KiB
C
2919 lines
75 KiB
C
#ifdef _WIN32
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/*******************************************************
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HIDAPI - Multi-Platform library for
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communication with HID devices.
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Alan Ott
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Signal 11 Software
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8/22/2009
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Copyright 2009, All Rights Reserved.
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At the discretion of the user of this library,
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this software may be licensed under the terms of the
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GNU General Public License v3, a BSD-Style license, or the
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original HIDAPI license as outlined in the LICENSE.txt,
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LICENSE-gpl3.txt, LICENSE-bsd.txt, and LICENSE-orig.txt
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files located at the root of the source distribution.
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These files may also be found in the public source
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code repository located at:
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http://github.com/signal11/hidapi .
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********************************************************/
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/* Copy of LICENSE-orig.txt (compatible with MIT/x11 license)
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HIDAPI - Multi-Platform library for
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communication with HID devices.
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Copyright 2009, Alan Ott, Signal 11 Software.
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All Rights Reserved.
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This software may be used by anyone for any reason so
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long as the copyright notice in the source files
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remains intact.
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*/
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#include <windows.h>
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#ifndef _NTDEF_
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typedef LONG NTSTATUS;
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#endif
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#ifdef __MINGW32__
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#include <ntdef.h>
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#include <winbase.h>
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#endif
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#ifdef __CYGWIN__
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#include <ntdef.h>
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#define _wcsdup wcsdup
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#endif
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/* The maximum number of characters that can be passed into the
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HidD_Get*String() functions without it failing.*/
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#define MAX_STRING_WCHARS 0xFFF
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/*#define HIDAPI_USE_DDK*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef TCC
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typedef struct _SP_DEVINFO_DATA {
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DWORD cbSize;
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GUID ClassGuid;
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DWORD DevInst;
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ULONG_PTR Reserved;
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} SP_DEVINFO_DATA, *PSP_DEVINFO_DATA;
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typedef struct _SP_DEVICE_INTERFACE_DATA {
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DWORD cbSize;
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GUID InterfaceClassGuid;
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DWORD Flags;
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ULONG_PTR Reserved;
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} SP_DEVICE_INTERFACE_DATA, *PSP_DEVICE_INTERFACE_DATA;
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typedef struct _SP_DEVICE_INTERFACE_DETAIL_DATA {
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DWORD cbSize;
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CHAR DevicePath[ANYSIZE_ARRAY];
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} SP_DEVICE_INTERFACE_DETAIL_DATA_A, *PSP_DEVICE_INTERFACE_DETAIL_DATA_A;
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typedef PVOID HDEVINFO;
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HDEVINFO WINAPI SetupDiGetClassDevsA(CONST GUID*,PCSTR,HWND,DWORD);
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#define DIGCF_PRESENT 0x00000002
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#define DIGCF_DEVICEINTERFACE 0x00000010
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#define SPDRP_CLASS 7
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#define SPDRP_DRIVER 9
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#define FILE_DEVICE_KEYBOARD 0x0000000b
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#define METHOD_OUT_DIRECT 2
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enum
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{ FILE_ANY_ACCESS = 0x00000000UL,
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FILE_SPECIAL_ACCESS = FILE_ANY_ACCESS,
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FILE_READ_ACCESS = 0x00000001UL,
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FILE_WRITE_ACCESS = 0x00000002UL
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};
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#define CTL_CODE(t,f,m,a) (((t)<<16)|((a)<<14)|((f)<<2)|(m))
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#else
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#include <setupapi.h>
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#include <winioctl.h>
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#endif
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#ifdef HIDAPI_USE_DDK
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#include <hidsdi.h>
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#endif
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/* Copied from inc/ddk/hidclass.h, part of the Windows DDK. */
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#define HID_OUT_CTL_CODE(id) \
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CTL_CODE(FILE_DEVICE_KEYBOARD, (id), METHOD_OUT_DIRECT, FILE_ANY_ACCESS)
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#define IOCTL_HID_GET_FEATURE HID_OUT_CTL_CODE(100)
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include "hidapi.h"
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#undef MIN
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#define MIN(x,y) ((x) < (y)? (x): (y))
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#ifdef _MSC_VER
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/* Thanks Microsoft, but I know how to use strncpy(). */
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#pragma warning(disable:4996)
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef HIDAPI_USE_DDK
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/* Since we're not building with the DDK, and the HID header
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files aren't part of the SDK, we have to define all this
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stuff here. In lookup_functions(), the function pointers
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defined below are set. */
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typedef struct _HIDD_ATTRIBUTES{
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ULONG Size;
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USHORT VendorID;
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USHORT ProductID;
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USHORT VersionNumber;
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} HIDD_ATTRIBUTES, *PHIDD_ATTRIBUTES;
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typedef USHORT USAGE;
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typedef struct _HIDP_CAPS {
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USAGE Usage;
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USAGE UsagePage;
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USHORT InputReportByteLength;
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USHORT OutputReportByteLength;
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USHORT FeatureReportByteLength;
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USHORT Reserved[17];
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USHORT fields_not_used_by_hidapi[10];
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} HIDP_CAPS, *PHIDP_CAPS;
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typedef void* PHIDP_PREPARSED_DATA;
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#define HIDP_STATUS_SUCCESS 0x110000
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typedef BOOLEAN (__stdcall *HidD_GetAttributes_)(HANDLE device, PHIDD_ATTRIBUTES attrib);
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typedef BOOLEAN (__stdcall *HidD_GetSerialNumberString_)(HANDLE device, PVOID buffer, ULONG buffer_len);
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typedef BOOLEAN (__stdcall *HidD_GetManufacturerString_)(HANDLE handle, PVOID buffer, ULONG buffer_len);
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typedef BOOLEAN (__stdcall *HidD_GetProductString_)(HANDLE handle, PVOID buffer, ULONG buffer_len);
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typedef BOOLEAN (__stdcall *HidD_SetFeature_)(HANDLE handle, PVOID data, ULONG length);
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typedef BOOLEAN (__stdcall *HidD_GetFeature_)(HANDLE handle, PVOID data, ULONG length);
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typedef BOOLEAN (__stdcall *HidD_GetIndexedString_)(HANDLE handle, ULONG string_index, PVOID buffer, ULONG buffer_len);
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typedef BOOLEAN (__stdcall *HidD_GetPreparsedData_)(HANDLE handle, PHIDP_PREPARSED_DATA *preparsed_data);
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typedef BOOLEAN (__stdcall *HidD_FreePreparsedData_)(PHIDP_PREPARSED_DATA preparsed_data);
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typedef NTSTATUS (__stdcall *HidP_GetCaps_)(PHIDP_PREPARSED_DATA preparsed_data, HIDP_CAPS *caps);
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typedef BOOLEAN (__stdcall *HidD_SetNumInputBuffers_)(HANDLE handle, ULONG number_buffers);
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static HidD_GetAttributes_ HidD_GetAttributes;
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static HidD_GetSerialNumberString_ HidD_GetSerialNumberString;
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static HidD_GetManufacturerString_ HidD_GetManufacturerString;
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static HidD_GetProductString_ HidD_GetProductString;
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static HidD_SetFeature_ HidD_SetFeature;
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static HidD_GetFeature_ HidD_GetFeature;
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static HidD_GetIndexedString_ HidD_GetIndexedString;
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static HidD_GetPreparsedData_ HidD_GetPreparsedData;
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static HidD_FreePreparsedData_ HidD_FreePreparsedData;
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static HidP_GetCaps_ HidP_GetCaps;
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static HidD_SetNumInputBuffers_ HidD_SetNumInputBuffers;
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static HMODULE lib_handle = NULL;
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static BOOLEAN initialized = FALSE;
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#endif /* HIDAPI_USE_DDK */
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struct hid_device_ {
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HANDLE device_handle;
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BOOL blocking;
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USHORT output_report_length;
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size_t input_report_length;
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void *last_error_str;
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DWORD last_error_num;
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BOOL read_pending;
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char *read_buf;
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OVERLAPPED ol;
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};
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static hid_device *new_hid_device()
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{
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hid_device *dev = (hid_device*) calloc(1, sizeof(hid_device));
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dev->device_handle = INVALID_HANDLE_VALUE;
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dev->blocking = TRUE;
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dev->output_report_length = 0;
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dev->input_report_length = 0;
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dev->last_error_str = NULL;
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dev->last_error_num = 0;
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dev->read_pending = FALSE;
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dev->read_buf = NULL;
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memset(&dev->ol, 0, sizeof(dev->ol));
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dev->ol.hEvent = CreateEvent(NULL, FALSE, FALSE /*initial state f=nonsignaled*/, NULL);
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return dev;
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}
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static void free_hid_device(hid_device *dev)
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{
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CloseHandle(dev->ol.hEvent);
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CloseHandle(dev->device_handle);
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LocalFree(dev->last_error_str);
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free(dev->read_buf);
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free(dev);
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}
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static void register_error(hid_device *device, const char *op)
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{
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WCHAR *ptr, *msg;
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FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER |
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FORMAT_MESSAGE_FROM_SYSTEM |
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FORMAT_MESSAGE_IGNORE_INSERTS,
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NULL,
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GetLastError(),
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MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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(LPVOID)&msg, 0/*sz*/,
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NULL);
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/* Get rid of the CR and LF that FormatMessage() sticks at the
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end of the message. Thanks Microsoft! */
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ptr = msg;
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while (*ptr) {
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if (*ptr == '\r') {
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*ptr = 0x0000;
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break;
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}
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ptr++;
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}
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/* Store the message off in the Device entry so that
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the hid_error() function can pick it up. */
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LocalFree(device->last_error_str);
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device->last_error_str = msg;
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}
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#ifndef HIDAPI_USE_DDK
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static int lookup_functions()
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{
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lib_handle = LoadLibraryA("hid.dll");
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if (lib_handle) {
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#define RESOLVE(x) x = (x##_)GetProcAddress(lib_handle, #x); if (!x) return -1;
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RESOLVE(HidD_GetAttributes);
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RESOLVE(HidD_GetSerialNumberString);
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RESOLVE(HidD_GetManufacturerString);
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RESOLVE(HidD_GetProductString);
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RESOLVE(HidD_SetFeature);
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RESOLVE(HidD_GetFeature);
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RESOLVE(HidD_GetIndexedString);
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RESOLVE(HidD_GetPreparsedData);
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RESOLVE(HidD_FreePreparsedData);
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RESOLVE(HidP_GetCaps);
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RESOLVE(HidD_SetNumInputBuffers);
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#undef RESOLVE
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}
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else
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return -1;
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return 0;
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}
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#endif
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static HANDLE open_device(const char *path, BOOL enumerate)
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{
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HANDLE handle;
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DWORD desired_access = (enumerate)? 0: (GENERIC_WRITE | GENERIC_READ);
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DWORD share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
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handle = CreateFileA(path,
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desired_access,
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share_mode,
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NULL,
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OPEN_EXISTING,
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FILE_FLAG_OVERLAPPED,/*FILE_ATTRIBUTE_NORMAL,*/
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0);
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return handle;
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}
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int HID_API_EXPORT hid_init(void)
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{
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#ifndef HIDAPI_USE_DDK
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if (!initialized) {
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if (lookup_functions() < 0) {
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hid_exit();
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return -1;
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}
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initialized = TRUE;
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}
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#endif
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return 0;
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}
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int HID_API_EXPORT hid_exit(void)
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{
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#ifndef HIDAPI_USE_DDK
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if (lib_handle)
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FreeLibrary(lib_handle);
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lib_handle = NULL;
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initialized = FALSE;
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#endif
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return 0;
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}
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struct hid_device_info HID_API_EXPORT * HID_API_CALL hid_enumerate(unsigned short vendor_id, unsigned short product_id)
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{
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BOOL res;
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struct hid_device_info *root = NULL; /* return object */
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struct hid_device_info *cur_dev = NULL;
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/* Windows objects for interacting with the driver. */
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GUID InterfaceClassGuid = {0x4d1e55b2, 0xf16f, 0x11cf, {0x88, 0xcb, 0x00, 0x11, 0x11, 0x00, 0x00, 0x30} };
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SP_DEVINFO_DATA devinfo_data;
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SP_DEVICE_INTERFACE_DATA device_interface_data;
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SP_DEVICE_INTERFACE_DETAIL_DATA_A *device_interface_detail_data = NULL;
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HDEVINFO device_info_set = INVALID_HANDLE_VALUE;
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int device_index = 0;
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int i;
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if (hid_init() < 0)
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return NULL;
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/* Initialize the Windows objects. */
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memset(&devinfo_data, 0x0, sizeof(devinfo_data));
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devinfo_data.cbSize = sizeof(SP_DEVINFO_DATA);
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device_interface_data.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
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/* Get information for all the devices belonging to the HID class. */
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device_info_set = SetupDiGetClassDevsA(&InterfaceClassGuid, NULL, NULL, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
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/* Iterate over each device in the HID class, looking for the right one. */
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for (;;) {
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HANDLE write_handle = INVALID_HANDLE_VALUE;
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DWORD required_size = 0;
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HIDD_ATTRIBUTES attrib;
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res = SetupDiEnumDeviceInterfaces(device_info_set,
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NULL,
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&InterfaceClassGuid,
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device_index,
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&device_interface_data);
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if (!res) {
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/* A return of FALSE from this function means that
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there are no more devices. */
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break;
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}
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/* Call with 0-sized detail size, and let the function
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tell us how long the detail struct needs to be. The
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size is put in &required_size. */
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res = SetupDiGetDeviceInterfaceDetailA(device_info_set,
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&device_interface_data,
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NULL,
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0,
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&required_size,
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NULL);
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/* Allocate a long enough structure for device_interface_detail_data. */
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device_interface_detail_data = (SP_DEVICE_INTERFACE_DETAIL_DATA_A*) malloc(required_size);
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device_interface_detail_data->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA_A);
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/* Get the detailed data for this device. The detail data gives us
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the device path for this device, which is then passed into
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CreateFile() to get a handle to the device. */
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res = SetupDiGetDeviceInterfaceDetailA(device_info_set,
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&device_interface_data,
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device_interface_detail_data,
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required_size,
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NULL,
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NULL);
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if (!res) {
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/* register_error(dev, "Unable to call SetupDiGetDeviceInterfaceDetail");
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Continue to the next device. */
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goto cont;
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}
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/* Make sure this device is of Setup Class "HIDClass" and has a
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driver bound to it. */
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for (i = 0; ; i++) {
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char driver_name[256];
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/* Populate devinfo_data. This function will return failure
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when there are no more interfaces left. */
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res = SetupDiEnumDeviceInfo(device_info_set, i, &devinfo_data);
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if (!res)
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goto cont;
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res = SetupDiGetDeviceRegistryPropertyA(device_info_set, &devinfo_data,
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SPDRP_CLASS, NULL, (PBYTE)driver_name, sizeof(driver_name), NULL);
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if (!res)
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goto cont;
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if (strcmp(driver_name, "HIDClass") == 0) {
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/* See if there's a driver bound. */
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res = SetupDiGetDeviceRegistryPropertyA(device_info_set, &devinfo_data,
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SPDRP_DRIVER, NULL, (PBYTE)driver_name, sizeof(driver_name), NULL);
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if (res)
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break;
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}
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}
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//wprintf(L"HandleName: %s\n", device_interface_detail_data->DevicePath);
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/* Open a handle to the device */
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write_handle = open_device(device_interface_detail_data->DevicePath, TRUE);
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/* Check validity of write_handle. */
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if (write_handle == INVALID_HANDLE_VALUE) {
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/* Unable to open the device. */
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//register_error(dev, "CreateFile");
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goto cont_close;
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}
|
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|
|
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/* Get the Vendor ID and Product ID for this device. */
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attrib.Size = sizeof(HIDD_ATTRIBUTES);
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HidD_GetAttributes(write_handle, &attrib);
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//wprintf(L"Product/Vendor: %x %x\n", attrib.ProductID, attrib.VendorID);
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|
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/* Check the VID/PID to see if we should add this
|
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device to the enumeration list. */
|
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if ((vendor_id == 0x0 || attrib.VendorID == vendor_id) &&
|
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(product_id == 0x0 || attrib.ProductID == product_id)) {
|
|
|
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#define WSTR_LEN 512
|
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const char *str;
|
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struct hid_device_info *tmp;
|
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PHIDP_PREPARSED_DATA pp_data = NULL;
|
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HIDP_CAPS caps;
|
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BOOLEAN res;
|
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NTSTATUS nt_res;
|
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wchar_t wstr[WSTR_LEN]; /* TODO: Determine Size */
|
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size_t len;
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|
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/* VID/PID match. Create the record. */
|
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tmp = (struct hid_device_info*) calloc(1, sizeof(struct hid_device_info));
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if (cur_dev) {
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cur_dev->next = tmp;
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}
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else {
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root = tmp;
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}
|
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cur_dev = tmp;
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|
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/* Get the Usage Page and Usage for this device. */
|
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res = HidD_GetPreparsedData(write_handle, &pp_data);
|
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if (res) {
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nt_res = HidP_GetCaps(pp_data, &caps);
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if (nt_res == HIDP_STATUS_SUCCESS) {
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cur_dev->usage_page = caps.UsagePage;
|
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cur_dev->usage = caps.Usage;
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}
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|
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HidD_FreePreparsedData(pp_data);
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}
|
|
|
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/* Fill out the record */
|
|
cur_dev->next = NULL;
|
|
str = device_interface_detail_data->DevicePath;
|
|
if (str) {
|
|
len = strlen(str);
|
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cur_dev->path = (char*) calloc(len+1, sizeof(char));
|
|
strncpy(cur_dev->path, str, len+1);
|
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cur_dev->path[len] = '\0';
|
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}
|
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else
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cur_dev->path = NULL;
|
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|
|
/* Serial Number */
|
|
res = HidD_GetSerialNumberString(write_handle, wstr, sizeof(wstr));
|
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wstr[WSTR_LEN-1] = 0x0000;
|
|
if (res) {
|
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cur_dev->serial_number = _wcsdup(wstr);
|
|
}
|
|
|
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/* Manufacturer String */
|
|
res = HidD_GetManufacturerString(write_handle, wstr, sizeof(wstr));
|
|
wstr[WSTR_LEN-1] = 0x0000;
|
|
if (res) {
|
|
cur_dev->manufacturer_string = _wcsdup(wstr);
|
|
}
|
|
|
|
/* Product String */
|
|
res = HidD_GetProductString(write_handle, wstr, sizeof(wstr));
|
|
wstr[WSTR_LEN-1] = 0x0000;
|
|
if (res) {
|
|
cur_dev->product_string = _wcsdup(wstr);
|
|
}
|
|
|
|
/* VID/PID */
|
|
cur_dev->vendor_id = attrib.VendorID;
|
|
cur_dev->product_id = attrib.ProductID;
|
|
|
|
/* Release Number */
|
|
cur_dev->release_number = attrib.VersionNumber;
|
|
|
|
/* Interface Number. It can sometimes be parsed out of the path
|
|
on Windows if a device has multiple interfaces. See
|
|
http://msdn.microsoft.com/en-us/windows/hardware/gg487473 or
|
|
search for "Hardware IDs for HID Devices" at MSDN. If it's not
|
|
in the path, it's set to -1. */
|
|
cur_dev->interface_number = -1;
|
|
if (cur_dev->path) {
|
|
char *interface_component = strstr(cur_dev->path, "&mi_");
|
|
if (interface_component) {
|
|
char *hex_str = interface_component + 4;
|
|
char *endptr = NULL;
|
|
cur_dev->interface_number = strtol(hex_str, &endptr, 16);
|
|
if (endptr == hex_str) {
|
|
/* The parsing failed. Set interface_number to -1. */
|
|
cur_dev->interface_number = -1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
cont_close:
|
|
CloseHandle(write_handle);
|
|
cont:
|
|
/* We no longer need the detail data. It can be freed */
|
|
free(device_interface_detail_data);
|
|
|
|
device_index++;
|
|
|
|
}
|
|
|
|
/* Close the device information handle. */
|
|
SetupDiDestroyDeviceInfoList(device_info_set);
|
|
|
|
return root;
|
|
|
|
}
|
|
|
|
void HID_API_EXPORT HID_API_CALL hid_free_enumeration(struct hid_device_info *devs)
|
|
{
|
|
/* TODO: Merge this with the Linux version. This function is platform-independent. */
|
|
struct hid_device_info *d = devs;
|
|
while (d) {
|
|
struct hid_device_info *next = d->next;
|
|
free(d->path);
|
|
free(d->serial_number);
|
|
free(d->manufacturer_string);
|
|
free(d->product_string);
|
|
free(d);
|
|
d = next;
|
|
}
|
|
}
|
|
|
|
|
|
HID_API_EXPORT hid_device * HID_API_CALL hid_open(unsigned short vendor_id, unsigned short product_id, const wchar_t *serial_number)
|
|
{
|
|
/* TODO: Merge this functions with the Linux version. This function should be platform independent. */
|
|
struct hid_device_info *devs, *cur_dev;
|
|
const char *path_to_open = NULL;
|
|
hid_device *handle = NULL;
|
|
|
|
devs = hid_enumerate(vendor_id, product_id);
|
|
cur_dev = devs;
|
|
while (cur_dev) {
|
|
if (cur_dev->vendor_id == vendor_id &&
|
|
cur_dev->product_id == product_id) {
|
|
if (serial_number) {
|
|
if (wcscmp(serial_number, cur_dev->serial_number) == 0) {
|
|
path_to_open = cur_dev->path;
|
|
break;
|
|
}
|
|
}
|
|
else {
|
|
path_to_open = cur_dev->path;
|
|
break;
|
|
}
|
|
}
|
|
cur_dev = cur_dev->next;
|
|
}
|
|
|
|
if (path_to_open) {
|
|
/* Open the device */
|
|
handle = hid_open_path(path_to_open);
|
|
}
|
|
|
|
hid_free_enumeration(devs);
|
|
|
|
return handle;
|
|
}
|
|
|
|
HID_API_EXPORT hid_device * HID_API_CALL hid_open_path(const char *path)
|
|
{
|
|
hid_device *dev;
|
|
HIDP_CAPS caps;
|
|
PHIDP_PREPARSED_DATA pp_data = NULL;
|
|
BOOLEAN res;
|
|
NTSTATUS nt_res;
|
|
|
|
if (hid_init() < 0) {
|
|
return NULL;
|
|
}
|
|
|
|
dev = new_hid_device();
|
|
|
|
/* Open a handle to the device */
|
|
dev->device_handle = open_device(path, FALSE);
|
|
|
|
/* Check validity of write_handle. */
|
|
if (dev->device_handle == INVALID_HANDLE_VALUE) {
|
|
/* Unable to open the device. */
|
|
register_error(dev, "CreateFile");
|
|
goto err;
|
|
}
|
|
|
|
/* Set the Input Report buffer size to 64 reports. */
|
|
res = HidD_SetNumInputBuffers(dev->device_handle, 64);
|
|
if (!res) {
|
|
register_error(dev, "HidD_SetNumInputBuffers");
|
|
goto err;
|
|
}
|
|
|
|
/* Get the Input Report length for the device. */
|
|
res = HidD_GetPreparsedData(dev->device_handle, &pp_data);
|
|
if (!res) {
|
|
register_error(dev, "HidD_GetPreparsedData");
|
|
goto err;
|
|
}
|
|
nt_res = HidP_GetCaps(pp_data, &caps);
|
|
if (nt_res != HIDP_STATUS_SUCCESS) {
|
|
register_error(dev, "HidP_GetCaps");
|
|
goto err_pp_data;
|
|
}
|
|
dev->output_report_length = caps.OutputReportByteLength;
|
|
dev->input_report_length = caps.InputReportByteLength;
|
|
HidD_FreePreparsedData(pp_data);
|
|
|
|
dev->read_buf = (char*) malloc(dev->input_report_length);
|
|
|
|
return dev;
|
|
|
|
err_pp_data:
|
|
HidD_FreePreparsedData(pp_data);
|
|
err:
|
|
free_hid_device(dev);
|
|
return NULL;
|
|
}
|
|
|
|
int HID_API_EXPORT HID_API_CALL hid_write(hid_device *dev, const unsigned char *data, size_t length)
|
|
{
|
|
DWORD bytes_written;
|
|
BOOL res;
|
|
|
|
OVERLAPPED ol;
|
|
unsigned char *buf;
|
|
memset(&ol, 0, sizeof(ol));
|
|
|
|
/* Make sure the right number of bytes are passed to WriteFile. Windows
|
|
expects the number of bytes which are in the _longest_ report (plus
|
|
one for the report number) bytes even if the data is a report
|
|
which is shorter than that. Windows gives us this value in
|
|
caps.OutputReportByteLength. If a user passes in fewer bytes than this,
|
|
create a temporary buffer which is the proper size. */
|
|
if (length >= dev->output_report_length) {
|
|
/* The user passed the right number of bytes. Use the buffer as-is. */
|
|
buf = (unsigned char *) data;
|
|
} else {
|
|
/* Create a temporary buffer and copy the user's data
|
|
into it, padding the rest with zeros. */
|
|
buf = (unsigned char *) malloc(dev->output_report_length);
|
|
memcpy(buf, data, length);
|
|
memset(buf + length, 0, dev->output_report_length - length);
|
|
length = dev->output_report_length;
|
|
}
|
|
|
|
res = WriteFile(dev->device_handle, buf, (DWORD)length, NULL, &ol);
|
|
int err = GetLastError();
|
|
|
|
if (!res) {
|
|
if (err != ERROR_IO_PENDING) {
|
|
/* WriteFile() failed. Return error. */
|
|
register_error(dev, "WriteFile");
|
|
bytes_written = -1;
|
|
goto end_of_function;
|
|
}
|
|
}
|
|
|
|
/* Wait here until the write is done. This makes
|
|
hid_write() synchronous. */
|
|
res = GetOverlappedResult(dev->device_handle, &ol, &bytes_written, TRUE/*wait*/);
|
|
if (!res) {
|
|
/* The Write operation failed. */
|
|
register_error(dev, "WriteFile");
|
|
bytes_written = -1;
|
|
goto end_of_function;
|
|
}
|
|
|
|
end_of_function:
|
|
if (buf != data)
|
|
free(buf);
|
|
|
|
return bytes_written;
|
|
}
|
|
|
|
|
|
int HID_API_EXPORT HID_API_CALL hid_read_timeout(hid_device *dev, unsigned char *data, size_t length, int milliseconds)
|
|
{
|
|
DWORD bytes_read = 0;
|
|
size_t copy_len = 0;
|
|
BOOL res;
|
|
|
|
/* Copy the handle for convenience. */
|
|
HANDLE ev = dev->ol.hEvent;
|
|
|
|
if (!dev->read_pending) {
|
|
/* Start an Overlapped I/O read. */
|
|
dev->read_pending = TRUE;
|
|
memset(dev->read_buf, 0, dev->input_report_length);
|
|
ResetEvent(ev);
|
|
res = ReadFile(dev->device_handle, dev->read_buf, (DWORD)dev->input_report_length, &bytes_read, &dev->ol);
|
|
|
|
if (!res) {
|
|
if (GetLastError() != ERROR_IO_PENDING) {
|
|
/* ReadFile() has failed.
|
|
Clean up and return error. */
|
|
CancelIo(dev->device_handle);
|
|
dev->read_pending = FALSE;
|
|
goto end_of_function;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (milliseconds >= 0) {
|
|
/* See if there is any data yet. */
|
|
res = WaitForSingleObject(ev, milliseconds);
|
|
if (res != WAIT_OBJECT_0) {
|
|
/* There was no data this time. Return zero bytes available,
|
|
but leave the Overlapped I/O running. */
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Either WaitForSingleObject() told us that ReadFile has completed, or
|
|
we are in non-blocking mode. Get the number of bytes read. The actual
|
|
data has been copied to the data[] array which was passed to ReadFile(). */
|
|
res = GetOverlappedResult(dev->device_handle, &dev->ol, &bytes_read, TRUE/*wait*/);
|
|
|
|
/* Set pending back to false, even if GetOverlappedResult() returned error. */
|
|
dev->read_pending = FALSE;
|
|
|
|
if (res && bytes_read > 0) {
|
|
if (dev->read_buf[0] == 0x0) {
|
|
/* If report numbers aren't being used, but Windows sticks a report
|
|
number (0x0) on the beginning of the report anyway. To make this
|
|
work like the other platforms, and to make it work more like the
|
|
HID spec, we'll skip over this byte. */
|
|
bytes_read--;
|
|
copy_len = length > bytes_read ? bytes_read : length;
|
|
memcpy(data, dev->read_buf+1, copy_len);
|
|
}
|
|
else {
|
|
/* Copy the whole buffer, report number and all. */
|
|
copy_len = length > bytes_read ? bytes_read : length;
|
|
memcpy(data, dev->read_buf, copy_len);
|
|
}
|
|
}
|
|
|
|
end_of_function:
|
|
if (!res) {
|
|
register_error(dev, "GetOverlappedResult");
|
|
return -1;
|
|
}
|
|
|
|
return (int)copy_len;
|
|
}
|
|
|
|
int HID_API_EXPORT HID_API_CALL hid_read(hid_device *dev, unsigned char *data, size_t length)
|
|
{
|
|
return hid_read_timeout(dev, data, length, (dev->blocking)? -1: 0);
|
|
}
|
|
|
|
int HID_API_EXPORT HID_API_CALL hid_set_nonblocking(hid_device *dev, int nonblock)
|
|
{
|
|
dev->blocking = !nonblock;
|
|
return 0; /* Success */
|
|
}
|
|
|
|
int HID_API_EXPORT HID_API_CALL hid_send_feature_report(hid_device *dev, const unsigned char *data, size_t length)
|
|
{
|
|
BOOL res = HidD_SetFeature(dev->device_handle, (PVOID)data, (ULONG)length);
|
|
if (!res) {
|
|
register_error(dev, "HidD_SetFeature");
|
|
return -1;
|
|
}
|
|
|
|
return (int)length;
|
|
}
|
|
|
|
|
|
int HID_API_EXPORT HID_API_CALL hid_get_feature_report(hid_device *dev, unsigned char *data, size_t length)
|
|
{
|
|
BOOL res;
|
|
#if 0
|
|
res = HidD_GetFeature(dev->device_handle, data, length);
|
|
if (!res) {
|
|
register_error(dev, "HidD_GetFeature");
|
|
return -1;
|
|
}
|
|
return 0; /* HidD_GetFeature() doesn't give us an actual length, unfortunately */
|
|
#else
|
|
DWORD bytes_returned;
|
|
|
|
OVERLAPPED ol;
|
|
memset(&ol, 0, sizeof(ol));
|
|
|
|
res = DeviceIoControl(dev->device_handle,
|
|
IOCTL_HID_GET_FEATURE,
|
|
data, (DWORD)length,
|
|
data, (DWORD)length,
|
|
&bytes_returned, &ol);
|
|
|
|
if (!res) {
|
|
if (GetLastError() != ERROR_IO_PENDING) {
|
|
/* DeviceIoControl() failed. Return error. */
|
|
register_error(dev, "Send Feature Report DeviceIoControl");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/* Wait here until the write is done. This makes
|
|
hid_get_feature_report() synchronous. */
|
|
res = GetOverlappedResult(dev->device_handle, &ol, &bytes_returned, TRUE/*wait*/);
|
|
if (!res) {
|
|
/* The operation failed. */
|
|
register_error(dev, "Send Feature Report GetOverLappedResult");
|
|
return -1;
|
|
}
|
|
|
|
/* bytes_returned does not include the first byte which contains the
|
|
report ID. The data buffer actually contains one more byte than
|
|
bytes_returned. */
|
|
bytes_returned++;
|
|
|
|
return bytes_returned;
|
|
#endif
|
|
}
|
|
|
|
void HID_API_EXPORT HID_API_CALL hid_close(hid_device *dev)
|
|
{
|
|
if (!dev)
|
|
return;
|
|
CancelIo(dev->device_handle);
|
|
free_hid_device(dev);
|
|
}
|
|
|
|
int HID_API_EXPORT_CALL HID_API_CALL hid_get_manufacturer_string(hid_device *dev, wchar_t *string, size_t maxlen)
|
|
{
|
|
BOOL res;
|
|
|
|
res = HidD_GetManufacturerString(dev->device_handle, string, (ULONG)(sizeof(wchar_t) * MIN(maxlen, MAX_STRING_WCHARS)));
|
|
if (!res) {
|
|
register_error(dev, "HidD_GetManufacturerString");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int HID_API_EXPORT_CALL HID_API_CALL hid_get_product_string(hid_device *dev, wchar_t *string, size_t maxlen)
|
|
{
|
|
BOOL res;
|
|
|
|
res = HidD_GetProductString(dev->device_handle, string, (ULONG)(sizeof(wchar_t) * MIN(maxlen, MAX_STRING_WCHARS)));
|
|
if (!res) {
|
|
register_error(dev, "HidD_GetProductString");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int HID_API_EXPORT_CALL HID_API_CALL hid_get_serial_number_string(hid_device *dev, wchar_t *string, size_t maxlen)
|
|
{
|
|
BOOL res;
|
|
|
|
res = HidD_GetSerialNumberString(dev->device_handle, string, (ULONG)(sizeof(wchar_t) * MIN(maxlen, MAX_STRING_WCHARS)));
|
|
if (!res) {
|
|
register_error(dev, "HidD_GetSerialNumberString");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int HID_API_EXPORT_CALL HID_API_CALL hid_get_indexed_string(hid_device *dev, int string_index, wchar_t *string, size_t maxlen)
|
|
{
|
|
BOOL res;
|
|
|
|
res = HidD_GetIndexedString(dev->device_handle, string_index, string, (ULONG)(sizeof(wchar_t) * MIN(maxlen, MAX_STRING_WCHARS)));
|
|
if (!res) {
|
|
register_error(dev, "HidD_GetIndexedString");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
HID_API_EXPORT const wchar_t * HID_API_CALL hid_error(hid_device *dev)
|
|
{
|
|
return (wchar_t*)dev->last_error_str;
|
|
}
|
|
|
|
|
|
/*#define PICPGM*/
|
|
/*#define S11*/
|
|
#define P32
|
|
#ifdef S11
|
|
unsigned short VendorID = 0xa0a0;
|
|
unsigned short ProductID = 0x0001;
|
|
#endif
|
|
|
|
#ifdef P32
|
|
unsigned short VendorID = 0x04d8;
|
|
unsigned short ProductID = 0x3f;
|
|
#endif
|
|
|
|
|
|
#ifdef PICPGM
|
|
unsigned short VendorID = 0x04d8;
|
|
unsigned short ProductID = 0x0033;
|
|
#endif
|
|
|
|
|
|
#if 0
|
|
int __cdecl main(int argc, char* argv[])
|
|
{
|
|
int res;
|
|
unsigned char buf[65];
|
|
|
|
UNREFERENCED_PARAMETER(argc);
|
|
UNREFERENCED_PARAMETER(argv);
|
|
|
|
/* Set up the command buffer. */
|
|
memset(buf,0x00,sizeof(buf));
|
|
buf[0] = 0;
|
|
buf[1] = 0x81;
|
|
|
|
|
|
/* Open the device. */
|
|
int handle = open(VendorID, ProductID, L"12345");
|
|
if (handle < 0)
|
|
printf("unable to open device\n");
|
|
|
|
|
|
/* Toggle LED (cmd 0x80) */
|
|
buf[1] = 0x80;
|
|
res = write(handle, buf, 65);
|
|
if (res < 0)
|
|
printf("Unable to write()\n");
|
|
|
|
/* Request state (cmd 0x81) */
|
|
buf[1] = 0x81;
|
|
write(handle, buf, 65);
|
|
if (res < 0)
|
|
printf("Unable to write() (2)\n");
|
|
|
|
/* Read requested state */
|
|
read(handle, buf, 65);
|
|
if (res < 0)
|
|
printf("Unable to read()\n");
|
|
|
|
/* Print out the returned buffer. */
|
|
for (int i = 0; i < 4; i++)
|
|
printf("buf[%d]: %d\n", i, buf[i]);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
} /* extern "C" */
|
|
#endif
|
|
|
|
|
|
#elif defined( __MACOSX__ )
|
|
|
|
/*******************************************************
|
|
HIDAPI - Multi-Platform library for
|
|
communication with HID devices.
|
|
|
|
Alan Ott
|
|
Signal 11 Software
|
|
|
|
2010-07-03
|
|
|
|
Copyright 2010, All Rights Reserved.
|
|
|
|
At the discretion of the user of this library,
|
|
this software may be licensed under the terms of the
|
|
GNU General Public License v3, a BSD-Style license, or the
|
|
original HIDAPI license as outlined in the LICENSE.txt,
|
|
LICENSE-gpl3.txt, LICENSE-bsd.txt, and LICENSE-orig.txt
|
|
files located at the root of the source distribution.
|
|
These files may also be found in the public source
|
|
code repository located at:
|
|
http://github.com/signal11/hidapi .
|
|
********************************************************/
|
|
|
|
/* See Apple Technical Note TN2187 for details on IOHidManager. */
|
|
|
|
#include <IOKit/hid/IOHIDManager.h>
|
|
#include <IOKit/hid/IOHIDKeys.h>
|
|
#include <IOKit/IOKitLib.h>
|
|
#include <CoreFoundation/CoreFoundation.h>
|
|
#include <wchar.h>
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#include <locale.h>
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#include <pthread.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include <dlfcn.h>
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#include "hidapi.h"
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/* Barrier implementation because Mac OSX doesn't have pthread_barrier.
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It also doesn't have clock_gettime(). So much for POSIX and SUSv2.
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This implementation came from Brent Priddy and was posted on
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StackOverflow. It is used with his permission. */
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typedef int pthread_barrierattr_t;
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typedef struct pthread_barrier {
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pthread_mutex_t mutex;
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pthread_cond_t cond;
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int count;
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int trip_count;
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} pthread_barrier_t;
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static int pthread_barrier_init(pthread_barrier_t *barrier, const pthread_barrierattr_t *attr, unsigned int count)
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{
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if(count == 0) {
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errno = EINVAL;
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return -1;
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}
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if(pthread_mutex_init(&barrier->mutex, 0) < 0) {
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return -1;
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}
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if(pthread_cond_init(&barrier->cond, 0) < 0) {
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pthread_mutex_destroy(&barrier->mutex);
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return -1;
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}
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barrier->trip_count = count;
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barrier->count = 0;
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return 0;
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}
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static int pthread_barrier_destroy(pthread_barrier_t *barrier)
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{
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pthread_cond_destroy(&barrier->cond);
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pthread_mutex_destroy(&barrier->mutex);
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return 0;
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}
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static int pthread_barrier_wait(pthread_barrier_t *barrier)
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{
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pthread_mutex_lock(&barrier->mutex);
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++(barrier->count);
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if(barrier->count >= barrier->trip_count)
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{
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barrier->count = 0;
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pthread_cond_broadcast(&barrier->cond);
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pthread_mutex_unlock(&barrier->mutex);
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return 1;
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}
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else
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{
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pthread_cond_wait(&barrier->cond, &(barrier->mutex));
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pthread_mutex_unlock(&barrier->mutex);
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return 0;
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}
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}
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static int return_data(hid_device *dev, unsigned char *data, size_t length);
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/* Linked List of input reports received from the device. */
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struct input_report {
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uint8_t *data;
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size_t len;
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struct input_report *next;
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};
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struct hid_device_ {
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IOHIDDeviceRef device_handle;
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int blocking;
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int uses_numbered_reports;
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int disconnected;
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CFStringRef run_loop_mode;
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CFRunLoopRef run_loop;
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CFRunLoopSourceRef source;
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uint8_t *input_report_buf;
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CFIndex max_input_report_len;
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struct input_report *input_reports;
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pthread_t thread;
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pthread_mutex_t mutex; /* Protects input_reports */
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pthread_cond_t condition;
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pthread_barrier_t barrier; /* Ensures correct startup sequence */
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pthread_barrier_t shutdown_barrier; /* Ensures correct shutdown sequence */
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int shutdown_thread;
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};
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static hid_device *new_hid_device(void)
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{
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hid_device *dev = calloc(1, sizeof(hid_device));
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dev->device_handle = NULL;
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dev->blocking = 1;
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dev->uses_numbered_reports = 0;
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dev->disconnected = 0;
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dev->run_loop_mode = NULL;
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dev->run_loop = NULL;
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dev->source = NULL;
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dev->input_report_buf = NULL;
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dev->input_reports = NULL;
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dev->shutdown_thread = 0;
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/* Thread objects */
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pthread_mutex_init(&dev->mutex, NULL);
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pthread_cond_init(&dev->condition, NULL);
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pthread_barrier_init(&dev->barrier, NULL, 2);
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pthread_barrier_init(&dev->shutdown_barrier, NULL, 2);
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return dev;
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}
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static void free_hid_device(hid_device *dev)
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{
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if (!dev)
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return;
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/* Delete any input reports still left over. */
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struct input_report *rpt = dev->input_reports;
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while (rpt) {
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struct input_report *next = rpt->next;
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free(rpt->data);
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free(rpt);
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rpt = next;
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}
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/* Free the string and the report buffer. The check for NULL
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is necessary here as CFRelease() doesn't handle NULL like
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free() and others do. */
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if (dev->run_loop_mode)
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CFRelease(dev->run_loop_mode);
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if (dev->source)
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CFRelease(dev->source);
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free(dev->input_report_buf);
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/* Clean up the thread objects */
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pthread_barrier_destroy(&dev->shutdown_barrier);
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pthread_barrier_destroy(&dev->barrier);
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pthread_cond_destroy(&dev->condition);
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pthread_mutex_destroy(&dev->mutex);
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/* Free the structure itself. */
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free(dev);
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}
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static IOHIDManagerRef hid_mgr = 0x0;
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#if 0
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static void register_error(hid_device *device, const char *op)
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{
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}
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#endif
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static int32_t get_int_property(IOHIDDeviceRef device, CFStringRef key)
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{
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CFTypeRef ref;
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int32_t value;
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ref = IOHIDDeviceGetProperty(device, key);
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if (ref) {
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if (CFGetTypeID(ref) == CFNumberGetTypeID()) {
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CFNumberGetValue((CFNumberRef) ref, kCFNumberSInt32Type, &value);
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return value;
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}
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}
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return 0;
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}
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static unsigned short get_vendor_id(IOHIDDeviceRef device)
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{
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return get_int_property(device, CFSTR(kIOHIDVendorIDKey));
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}
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static unsigned short get_product_id(IOHIDDeviceRef device)
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{
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return get_int_property(device, CFSTR(kIOHIDProductIDKey));
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}
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static int32_t get_max_report_length(IOHIDDeviceRef device)
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{
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return get_int_property(device, CFSTR(kIOHIDMaxInputReportSizeKey));
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}
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static int get_string_property(IOHIDDeviceRef device, CFStringRef prop, wchar_t *buf, size_t len)
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{
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CFStringRef str;
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if (!len)
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return 0;
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str = IOHIDDeviceGetProperty(device, prop);
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buf[0] = 0;
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if (str) {
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CFIndex str_len = CFStringGetLength(str);
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CFRange range;
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CFIndex used_buf_len;
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CFIndex chars_copied;
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len --;
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range.location = 0;
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range.length = ((size_t)str_len > len)? len: (size_t)str_len;
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chars_copied = CFStringGetBytes(str,
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range,
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kCFStringEncodingUTF32LE,
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(char)'?',
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FALSE,
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(UInt8*)buf,
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len * sizeof(wchar_t),
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&used_buf_len);
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if (chars_copied == len)
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buf[len] = 0; /* len is decremented above */
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else
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buf[chars_copied] = 0;
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return 0;
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}
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else
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return -1;
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}
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static int get_serial_number(IOHIDDeviceRef device, wchar_t *buf, size_t len)
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{
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return get_string_property(device, CFSTR(kIOHIDSerialNumberKey), buf, len);
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}
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static int get_manufacturer_string(IOHIDDeviceRef device, wchar_t *buf, size_t len)
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{
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return get_string_property(device, CFSTR(kIOHIDManufacturerKey), buf, len);
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}
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static int get_product_string(IOHIDDeviceRef device, wchar_t *buf, size_t len)
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{
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return get_string_property(device, CFSTR(kIOHIDProductKey), buf, len);
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}
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/* Implementation of wcsdup() for Mac. */
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static wchar_t *dup_wcs(const wchar_t *s)
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{
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size_t len = wcslen(s);
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wchar_t *ret = malloc((len+1)*sizeof(wchar_t));
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wcscpy(ret, s);
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return ret;
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}
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/* hidapi_IOHIDDeviceGetService()
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*
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* Return the io_service_t corresponding to a given IOHIDDeviceRef, either by:
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* - on OS X 10.6 and above, calling IOHIDDeviceGetService()
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* - on OS X 10.5, extract it from the IOHIDDevice struct
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*/
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static io_service_t hidapi_IOHIDDeviceGetService(IOHIDDeviceRef device)
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{
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static void *iokit_framework = NULL;
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static io_service_t (*dynamic_IOHIDDeviceGetService)(IOHIDDeviceRef device) = NULL;
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/* Use dlopen()/dlsym() to get a pointer to IOHIDDeviceGetService() if it exists.
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* If any of these steps fail, dynamic_IOHIDDeviceGetService will be left NULL
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* and the fallback method will be used.
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*/
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if (iokit_framework == NULL) {
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iokit_framework = dlopen("/System/Library/IOKit.framework/IOKit", RTLD_LAZY);
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if (iokit_framework != NULL)
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dynamic_IOHIDDeviceGetService = dlsym(iokit_framework, "IOHIDDeviceGetService");
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}
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if (dynamic_IOHIDDeviceGetService != NULL) {
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/* Running on OS X 10.6 and above: IOHIDDeviceGetService() exists */
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return dynamic_IOHIDDeviceGetService(device);
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}
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else
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{
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/* Running on OS X 10.5: IOHIDDeviceGetService() doesn't exist.
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*
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* Be naughty and pull the service out of the IOHIDDevice.
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* IOHIDDevice is an opaque struct not exposed to applications, but its
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* layout is stable through all available versions of OS X.
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* Tested and working on OS X 10.5.8 i386, x86_64, and ppc.
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*/
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struct IOHIDDevice_internal {
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/* The first field of the IOHIDDevice struct is a
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* CFRuntimeBase (which is a private CF struct).
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*
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* a, b, and c are the 3 fields that make up a CFRuntimeBase.
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* See http://opensource.apple.com/source/CF/CF-476.18/CFRuntime.h
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*
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* The second field of the IOHIDDevice is the io_service_t we're looking for.
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*/
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uintptr_t a;
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uint8_t b[4];
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#if __LP64__
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uint32_t c;
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#endif
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io_service_t service;
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};
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struct IOHIDDevice_internal *tmp = (struct IOHIDDevice_internal *)device;
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return tmp->service;
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}
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}
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/* Initialize the IOHIDManager. Return 0 for success and -1 for failure. */
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static int init_hid_manager(void)
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{
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/* Initialize all the HID Manager Objects */
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hid_mgr = IOHIDManagerCreate(kCFAllocatorDefault, kIOHIDOptionsTypeNone);
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if (hid_mgr) {
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IOHIDManagerSetDeviceMatching(hid_mgr, NULL);
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IOHIDManagerScheduleWithRunLoop(hid_mgr, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);
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return 0;
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}
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return -1;
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}
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/* Initialize the IOHIDManager if necessary. This is the public function, and
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it is safe to call this function repeatedly. Return 0 for success and -1
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for failure. */
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int HID_API_EXPORT hid_init(void)
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{
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if (!hid_mgr) {
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return init_hid_manager();
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}
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/* Already initialized. */
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return 0;
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}
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int HID_API_EXPORT hid_exit(void)
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{
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if (hid_mgr) {
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/* Close the HID manager. */
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IOHIDManagerClose(hid_mgr, kIOHIDOptionsTypeNone);
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CFRelease(hid_mgr);
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hid_mgr = NULL;
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}
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return 0;
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}
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static void process_pending_events(void) {
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SInt32 res;
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do {
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res = CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.001, FALSE);
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} while(res != kCFRunLoopRunFinished && res != kCFRunLoopRunTimedOut);
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}
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struct hid_device_info HID_API_EXPORT *hid_enumerate(unsigned short vendor_id, unsigned short product_id)
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{
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struct hid_device_info *root = NULL; /* return object */
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struct hid_device_info *cur_dev = NULL;
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CFIndex num_devices;
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int i;
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/* Set up the HID Manager if it hasn't been done */
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if (hid_init() < 0)
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return NULL;
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/* give the IOHIDManager a chance to update itself */
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process_pending_events();
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/* Get a list of the Devices */
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IOHIDManagerSetDeviceMatching(hid_mgr, NULL);
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CFSetRef device_set = IOHIDManagerCopyDevices(hid_mgr);
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/* Convert the list into a C array so we can iterate easily. */
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num_devices = CFSetGetCount(device_set);
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IOHIDDeviceRef *device_array = calloc(num_devices, sizeof(IOHIDDeviceRef));
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CFSetGetValues(device_set, (const void **) device_array);
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/* Iterate over each device, making an entry for it. */
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for (i = 0; i < num_devices; i++) {
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unsigned short dev_vid;
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unsigned short dev_pid;
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#define BUF_LEN 256
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wchar_t buf[BUF_LEN];
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IOHIDDeviceRef dev = device_array[i];
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if (!dev) {
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continue;
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}
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dev_vid = get_vendor_id(dev);
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dev_pid = get_product_id(dev);
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/* Check the VID/PID against the arguments */
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if ((vendor_id == 0x0 || vendor_id == dev_vid) &&
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(product_id == 0x0 || product_id == dev_pid)) {
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struct hid_device_info *tmp;
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io_object_t iokit_dev;
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kern_return_t res;
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io_string_t path;
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/* VID/PID match. Create the record. */
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tmp = malloc(sizeof(struct hid_device_info));
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if (cur_dev) {
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cur_dev->next = tmp;
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}
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else {
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root = tmp;
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}
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cur_dev = tmp;
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/* Get the Usage Page and Usage for this device. */
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cur_dev->usage_page = get_int_property(dev, CFSTR(kIOHIDPrimaryUsagePageKey));
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cur_dev->usage = get_int_property(dev, CFSTR(kIOHIDPrimaryUsageKey));
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/* Fill out the record */
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cur_dev->next = NULL;
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/* Fill in the path (IOService plane) */
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iokit_dev = hidapi_IOHIDDeviceGetService(dev);
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res = IORegistryEntryGetPath(iokit_dev, kIOServicePlane, path);
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if (res == KERN_SUCCESS)
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cur_dev->path = strdup(path);
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else
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cur_dev->path = strdup("");
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/* Serial Number */
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get_serial_number(dev, buf, BUF_LEN);
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cur_dev->serial_number = dup_wcs(buf);
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/* Manufacturer and Product strings */
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get_manufacturer_string(dev, buf, BUF_LEN);
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cur_dev->manufacturer_string = dup_wcs(buf);
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get_product_string(dev, buf, BUF_LEN);
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cur_dev->product_string = dup_wcs(buf);
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/* VID/PID */
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cur_dev->vendor_id = dev_vid;
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cur_dev->product_id = dev_pid;
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/* Release Number */
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cur_dev->release_number = get_int_property(dev, CFSTR(kIOHIDVersionNumberKey));
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/* Interface Number (Unsupported on Mac)*/
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cur_dev->interface_number = -1;
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}
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}
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free(device_array);
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CFRelease(device_set);
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return root;
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}
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void HID_API_EXPORT hid_free_enumeration(struct hid_device_info *devs)
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{
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/* This function is identical to the Linux version. Platform independent. */
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struct hid_device_info *d = devs;
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while (d) {
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struct hid_device_info *next = d->next;
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free(d->path);
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free(d->serial_number);
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free(d->manufacturer_string);
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free(d->product_string);
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free(d);
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d = next;
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}
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}
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hid_device * HID_API_EXPORT hid_open(unsigned short vendor_id, unsigned short product_id, const wchar_t *serial_number)
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{
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/* This function is identical to the Linux version. Platform independent. */
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struct hid_device_info *devs, *cur_dev;
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const char *path_to_open = NULL;
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hid_device * handle = NULL;
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devs = hid_enumerate(vendor_id, product_id);
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cur_dev = devs;
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while (cur_dev) {
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if (cur_dev->vendor_id == vendor_id &&
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cur_dev->product_id == product_id) {
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if (serial_number) {
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if (wcscmp(serial_number, cur_dev->serial_number) == 0) {
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path_to_open = cur_dev->path;
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break;
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}
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}
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else {
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path_to_open = cur_dev->path;
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break;
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}
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}
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cur_dev = cur_dev->next;
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}
|
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|
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if (path_to_open) {
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/* Open the device */
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handle = hid_open_path(path_to_open);
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}
|
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|
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hid_free_enumeration(devs);
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return handle;
|
|
}
|
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|
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static void hid_device_removal_callback(void *context, IOReturn result,
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void *sender)
|
|
{
|
|
/* Stop the Run Loop for this device. */
|
|
hid_device *d = context;
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|
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d->disconnected = 1;
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CFRunLoopStop(d->run_loop);
|
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}
|
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|
|
/* The Run Loop calls this function for each input report received.
|
|
This function puts the data into a linked list to be picked up by
|
|
hid_read(). */
|
|
static void hid_report_callback(void *context, IOReturn result, void *sender,
|
|
IOHIDReportType report_type, uint32_t report_id,
|
|
uint8_t *report, CFIndex report_length)
|
|
{
|
|
struct input_report *rpt;
|
|
hid_device *dev = context;
|
|
|
|
/* Make a new Input Report object */
|
|
rpt = calloc(1, sizeof(struct input_report));
|
|
rpt->data = calloc(1, report_length);
|
|
memcpy(rpt->data, report, report_length);
|
|
rpt->len = report_length;
|
|
rpt->next = NULL;
|
|
|
|
/* Lock this section */
|
|
pthread_mutex_lock(&dev->mutex);
|
|
|
|
/* Attach the new report object to the end of the list. */
|
|
if (dev->input_reports == NULL) {
|
|
/* The list is empty. Put it at the root. */
|
|
dev->input_reports = rpt;
|
|
}
|
|
else {
|
|
/* Find the end of the list and attach. */
|
|
struct input_report *cur = dev->input_reports;
|
|
int num_queued = 0;
|
|
while (cur->next != NULL) {
|
|
cur = cur->next;
|
|
num_queued++;
|
|
}
|
|
cur->next = rpt;
|
|
|
|
/* Pop one off if we've reached 30 in the queue. This
|
|
way we don't grow forever if the user never reads
|
|
anything from the device. */
|
|
if (num_queued > 30) {
|
|
return_data(dev, NULL, 0);
|
|
}
|
|
}
|
|
|
|
/* Signal a waiting thread that there is data. */
|
|
pthread_cond_signal(&dev->condition);
|
|
|
|
/* Unlock */
|
|
pthread_mutex_unlock(&dev->mutex);
|
|
|
|
}
|
|
|
|
/* This gets called when the read_thread's run loop gets signaled by
|
|
hid_close(), and serves to stop the read_thread's run loop. */
|
|
static void perform_signal_callback(void *context)
|
|
{
|
|
hid_device *dev = context;
|
|
CFRunLoopStop(dev->run_loop); /*TODO: CFRunLoopGetCurrent()*/
|
|
}
|
|
|
|
static void *read_thread(void *param)
|
|
{
|
|
hid_device *dev = param;
|
|
SInt32 code;
|
|
|
|
/* Move the device's run loop to this thread. */
|
|
IOHIDDeviceScheduleWithRunLoop(dev->device_handle, CFRunLoopGetCurrent(), dev->run_loop_mode);
|
|
|
|
/* Create the RunLoopSource which is used to signal the
|
|
event loop to stop when hid_close() is called. */
|
|
CFRunLoopSourceContext ctx;
|
|
memset(&ctx, 0, sizeof(ctx));
|
|
ctx.version = 0;
|
|
ctx.info = dev;
|
|
ctx.perform = &perform_signal_callback;
|
|
dev->source = CFRunLoopSourceCreate(kCFAllocatorDefault, 0/*order*/, &ctx);
|
|
CFRunLoopAddSource(CFRunLoopGetCurrent(), dev->source, dev->run_loop_mode);
|
|
|
|
/* Store off the Run Loop so it can be stopped from hid_close()
|
|
and on device disconnection. */
|
|
dev->run_loop = CFRunLoopGetCurrent();
|
|
|
|
/* Notify the main thread that the read thread is up and running. */
|
|
pthread_barrier_wait(&dev->barrier);
|
|
|
|
/* Run the Event Loop. CFRunLoopRunInMode() will dispatch HID input
|
|
reports into the hid_report_callback(). */
|
|
while (!dev->shutdown_thread && !dev->disconnected) {
|
|
code = CFRunLoopRunInMode(dev->run_loop_mode, 1000/*sec*/, FALSE);
|
|
/* Return if the device has been disconnected */
|
|
if (code == kCFRunLoopRunFinished) {
|
|
dev->disconnected = 1;
|
|
break;
|
|
}
|
|
|
|
|
|
/* Break if The Run Loop returns Finished or Stopped. */
|
|
if (code != kCFRunLoopRunTimedOut &&
|
|
code != kCFRunLoopRunHandledSource) {
|
|
/* There was some kind of error. Setting
|
|
shutdown seems to make sense, but
|
|
there may be something else more appropriate */
|
|
dev->shutdown_thread = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Now that the read thread is stopping, Wake any threads which are
|
|
waiting on data (in hid_read_timeout()). Do this under a mutex to
|
|
make sure that a thread which is about to go to sleep waiting on
|
|
the condition actually will go to sleep before the condition is
|
|
signaled. */
|
|
pthread_mutex_lock(&dev->mutex);
|
|
pthread_cond_broadcast(&dev->condition);
|
|
pthread_mutex_unlock(&dev->mutex);
|
|
|
|
/* Wait here until hid_close() is called and makes it past
|
|
the call to CFRunLoopWakeUp(). This thread still needs to
|
|
be valid when that function is called on the other thread. */
|
|
pthread_barrier_wait(&dev->shutdown_barrier);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* hid_open_path()
|
|
*
|
|
* path must be a valid path to an IOHIDDevice in the IOService plane
|
|
* Example: "IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/EHC1@1D,7/AppleUSBEHCI/PLAYSTATION(R)3 Controller@fd120000/IOUSBInterface@0/IOUSBHIDDriver"
|
|
*/
|
|
hid_device * HID_API_EXPORT hid_open_path(const char *path)
|
|
{
|
|
hid_device *dev = NULL;
|
|
io_registry_entry_t entry = MACH_PORT_NULL;
|
|
|
|
dev = new_hid_device();
|
|
|
|
/* Set up the HID Manager if it hasn't been done */
|
|
if (hid_init() < 0)
|
|
return NULL;
|
|
|
|
/* Get the IORegistry entry for the given path */
|
|
entry = IORegistryEntryFromPath(kIOMasterPortDefault, path);
|
|
if (entry == MACH_PORT_NULL) {
|
|
/* Path wasn't valid (maybe device was removed?) */
|
|
goto return_error;
|
|
}
|
|
|
|
/* Create an IOHIDDevice for the entry */
|
|
dev->device_handle = IOHIDDeviceCreate(kCFAllocatorDefault, entry);
|
|
if (dev->device_handle == NULL) {
|
|
/* Error creating the HID device */
|
|
goto return_error;
|
|
}
|
|
|
|
/* Open the IOHIDDevice */
|
|
IOReturn ret = IOHIDDeviceOpen(dev->device_handle, kIOHIDOptionsTypeSeizeDevice);
|
|
if (ret == kIOReturnSuccess) {
|
|
char str[32];
|
|
|
|
/* Create the buffers for receiving data */
|
|
dev->max_input_report_len = (CFIndex) get_max_report_length(dev->device_handle);
|
|
dev->input_report_buf = calloc(dev->max_input_report_len, sizeof(uint8_t));
|
|
|
|
/* Create the Run Loop Mode for this device.
|
|
printing the reference seems to work. */
|
|
sprintf(str, "HIDAPI_%p", dev->device_handle);
|
|
dev->run_loop_mode =
|
|
CFStringCreateWithCString(NULL, str, kCFStringEncodingASCII);
|
|
|
|
/* Attach the device to a Run Loop */
|
|
IOHIDDeviceRegisterInputReportCallback(
|
|
dev->device_handle, dev->input_report_buf, dev->max_input_report_len,
|
|
&hid_report_callback, dev);
|
|
IOHIDDeviceRegisterRemovalCallback(dev->device_handle, hid_device_removal_callback, dev);
|
|
|
|
/* Start the read thread */
|
|
pthread_create(&dev->thread, NULL, read_thread, dev);
|
|
|
|
/* Wait here for the read thread to be initialized. */
|
|
pthread_barrier_wait(&dev->barrier);
|
|
|
|
IOObjectRelease(entry);
|
|
return dev;
|
|
}
|
|
else {
|
|
goto return_error;
|
|
}
|
|
|
|
return_error:
|
|
if (dev->device_handle != NULL)
|
|
CFRelease(dev->device_handle);
|
|
|
|
if (entry != MACH_PORT_NULL)
|
|
IOObjectRelease(entry);
|
|
|
|
free_hid_device(dev);
|
|
return NULL;
|
|
}
|
|
|
|
static int set_report(hid_device *dev, IOHIDReportType type, const unsigned char *data, size_t length)
|
|
{
|
|
const unsigned char *data_to_send;
|
|
size_t length_to_send;
|
|
IOReturn res;
|
|
|
|
/* Return if the device has been disconnected. */
|
|
if (dev->disconnected)
|
|
return -1;
|
|
|
|
if (data[0] == 0x0) {
|
|
/* Not using numbered Reports.
|
|
Don't send the report number. */
|
|
data_to_send = data+1;
|
|
length_to_send = length-1;
|
|
}
|
|
else {
|
|
/* Using numbered Reports.
|
|
Send the Report Number */
|
|
data_to_send = data;
|
|
length_to_send = length;
|
|
}
|
|
|
|
if (!dev->disconnected) {
|
|
res = IOHIDDeviceSetReport(dev->device_handle,
|
|
type,
|
|
data[0], /* Report ID*/
|
|
data_to_send, length_to_send);
|
|
|
|
if (res == kIOReturnSuccess) {
|
|
return length;
|
|
}
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
int HID_API_EXPORT hid_write(hid_device *dev, const unsigned char *data, size_t length)
|
|
{
|
|
return set_report(dev, kIOHIDReportTypeOutput, data, length);
|
|
}
|
|
|
|
/* Helper function, so that this isn't duplicated in hid_read(). */
|
|
static int return_data(hid_device *dev, unsigned char *data, size_t length)
|
|
{
|
|
/* Copy the data out of the linked list item (rpt) into the
|
|
return buffer (data), and delete the liked list item. */
|
|
struct input_report *rpt = dev->input_reports;
|
|
size_t len = (length < rpt->len)? length: rpt->len;
|
|
memcpy(data, rpt->data, len);
|
|
dev->input_reports = rpt->next;
|
|
free(rpt->data);
|
|
free(rpt);
|
|
return len;
|
|
}
|
|
|
|
static int cond_wait(const hid_device *dev, pthread_cond_t *cond, pthread_mutex_t *mutex)
|
|
{
|
|
while (!dev->input_reports) {
|
|
int res = pthread_cond_wait(cond, mutex);
|
|
if (res != 0)
|
|
return res;
|
|
|
|
/* A res of 0 means we may have been signaled or it may
|
|
be a spurious wakeup. Check to see that there's acutally
|
|
data in the queue before returning, and if not, go back
|
|
to sleep. See the pthread_cond_timedwait() man page for
|
|
details. */
|
|
|
|
if (dev->shutdown_thread || dev->disconnected)
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cond_timedwait(const hid_device *dev, pthread_cond_t *cond, pthread_mutex_t *mutex, const struct timespec *abstime)
|
|
{
|
|
while (!dev->input_reports) {
|
|
int res = pthread_cond_timedwait(cond, mutex, abstime);
|
|
if (res != 0)
|
|
return res;
|
|
|
|
/* A res of 0 means we may have been signaled or it may
|
|
be a spurious wakeup. Check to see that there's acutally
|
|
data in the queue before returning, and if not, go back
|
|
to sleep. See the pthread_cond_timedwait() man page for
|
|
details. */
|
|
|
|
if (dev->shutdown_thread || dev->disconnected)
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
int HID_API_EXPORT hid_read_timeout(hid_device *dev, unsigned char *data, size_t length, int milliseconds)
|
|
{
|
|
int bytes_read = -1;
|
|
|
|
/* Lock the access to the report list. */
|
|
pthread_mutex_lock(&dev->mutex);
|
|
|
|
/* There's an input report queued up. Return it. */
|
|
if (dev->input_reports) {
|
|
/* Return the first one */
|
|
bytes_read = return_data(dev, data, length);
|
|
goto ret;
|
|
}
|
|
|
|
/* Return if the device has been disconnected. */
|
|
if (dev->disconnected) {
|
|
bytes_read = -1;
|
|
goto ret;
|
|
}
|
|
|
|
if (dev->shutdown_thread) {
|
|
/* This means the device has been closed (or there
|
|
has been an error. An error code of -1 should
|
|
be returned. */
|
|
bytes_read = -1;
|
|
goto ret;
|
|
}
|
|
|
|
/* There is no data. Go to sleep and wait for data. */
|
|
|
|
if (milliseconds == -1) {
|
|
/* Blocking */
|
|
int res;
|
|
res = cond_wait(dev, &dev->condition, &dev->mutex);
|
|
if (res == 0)
|
|
bytes_read = return_data(dev, data, length);
|
|
else {
|
|
/* There was an error, or a device disconnection. */
|
|
bytes_read = -1;
|
|
}
|
|
}
|
|
else if (milliseconds > 0) {
|
|
/* Non-blocking, but called with timeout. */
|
|
int res;
|
|
struct timespec ts;
|
|
struct timeval tv;
|
|
gettimeofday(&tv, NULL);
|
|
TIMEVAL_TO_TIMESPEC(&tv, &ts);
|
|
ts.tv_sec += milliseconds / 1000;
|
|
ts.tv_nsec += (milliseconds % 1000) * 1000000;
|
|
if (ts.tv_nsec >= 1000000000L) {
|
|
ts.tv_sec++;
|
|
ts.tv_nsec -= 1000000000L;
|
|
}
|
|
|
|
res = cond_timedwait(dev, &dev->condition, &dev->mutex, &ts);
|
|
if (res == 0)
|
|
bytes_read = return_data(dev, data, length);
|
|
else if (res == ETIMEDOUT)
|
|
bytes_read = 0;
|
|
else
|
|
bytes_read = -1;
|
|
}
|
|
else {
|
|
/* Purely non-blocking */
|
|
bytes_read = 0;
|
|
}
|
|
|
|
ret:
|
|
/* Unlock */
|
|
pthread_mutex_unlock(&dev->mutex);
|
|
return bytes_read;
|
|
}
|
|
|
|
int HID_API_EXPORT hid_read(hid_device *dev, unsigned char *data, size_t length)
|
|
{
|
|
return hid_read_timeout(dev, data, length, (dev->blocking)? -1: 0);
|
|
}
|
|
|
|
int HID_API_EXPORT hid_set_nonblocking(hid_device *dev, int nonblock)
|
|
{
|
|
/* All Nonblocking operation is handled by the library. */
|
|
dev->blocking = !nonblock;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int HID_API_EXPORT hid_send_feature_report(hid_device *dev, const unsigned char *data, size_t length)
|
|
{
|
|
return set_report(dev, kIOHIDReportTypeFeature, data, length);
|
|
}
|
|
|
|
int HID_API_EXPORT hid_get_feature_report(hid_device *dev, unsigned char *data, size_t length)
|
|
{
|
|
CFIndex len = length;
|
|
IOReturn res;
|
|
|
|
/* Return if the device has been unplugged. */
|
|
if (dev->disconnected)
|
|
return -1;
|
|
|
|
res = IOHIDDeviceGetReport(dev->device_handle,
|
|
kIOHIDReportTypeFeature,
|
|
data[0], /* Report ID */
|
|
data, &len);
|
|
if (res == kIOReturnSuccess)
|
|
return len;
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
|
|
void HID_API_EXPORT hid_close(hid_device *dev)
|
|
{
|
|
if (!dev)
|
|
return;
|
|
|
|
/* Disconnect the report callback before close. */
|
|
if (!dev->disconnected) {
|
|
IOHIDDeviceRegisterInputReportCallback(
|
|
dev->device_handle, dev->input_report_buf, dev->max_input_report_len,
|
|
NULL, dev);
|
|
IOHIDDeviceRegisterRemovalCallback(dev->device_handle, NULL, dev);
|
|
IOHIDDeviceUnscheduleFromRunLoop(dev->device_handle, dev->run_loop, dev->run_loop_mode);
|
|
IOHIDDeviceScheduleWithRunLoop(dev->device_handle, CFRunLoopGetMain(), kCFRunLoopDefaultMode);
|
|
}
|
|
|
|
/* Cause read_thread() to stop. */
|
|
dev->shutdown_thread = 1;
|
|
|
|
/* Wake up the run thread's event loop so that the thread can exit. */
|
|
CFRunLoopSourceSignal(dev->source);
|
|
CFRunLoopWakeUp(dev->run_loop);
|
|
|
|
/* Notify the read thread that it can shut down now. */
|
|
pthread_barrier_wait(&dev->shutdown_barrier);
|
|
|
|
/* Wait for read_thread() to end. */
|
|
pthread_join(dev->thread, NULL);
|
|
|
|
/* Close the OS handle to the device, but only if it's not
|
|
been unplugged. If it's been unplugged, then calling
|
|
IOHIDDeviceClose() will crash. */
|
|
if (!dev->disconnected) {
|
|
IOHIDDeviceClose(dev->device_handle, kIOHIDOptionsTypeSeizeDevice);
|
|
}
|
|
|
|
/* Clear out the queue of received reports. */
|
|
pthread_mutex_lock(&dev->mutex);
|
|
while (dev->input_reports) {
|
|
return_data(dev, NULL, 0);
|
|
}
|
|
pthread_mutex_unlock(&dev->mutex);
|
|
CFRelease(dev->device_handle);
|
|
|
|
free_hid_device(dev);
|
|
}
|
|
|
|
int HID_API_EXPORT_CALL hid_get_manufacturer_string(hid_device *dev, wchar_t *string, size_t maxlen)
|
|
{
|
|
return get_manufacturer_string(dev->device_handle, string, maxlen);
|
|
}
|
|
|
|
int HID_API_EXPORT_CALL hid_get_product_string(hid_device *dev, wchar_t *string, size_t maxlen)
|
|
{
|
|
return get_product_string(dev->device_handle, string, maxlen);
|
|
}
|
|
|
|
int HID_API_EXPORT_CALL hid_get_serial_number_string(hid_device *dev, wchar_t *string, size_t maxlen)
|
|
{
|
|
return get_serial_number(dev->device_handle, string, maxlen);
|
|
}
|
|
|
|
int HID_API_EXPORT_CALL hid_get_indexed_string(hid_device *dev, int string_index, wchar_t *string, size_t maxlen)
|
|
{
|
|
/* TODO: */
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
HID_API_EXPORT const wchar_t * HID_API_CALL hid_error(hid_device *dev)
|
|
{
|
|
/* TODO: */
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#if 0
|
|
static int32_t get_location_id(IOHIDDeviceRef device)
|
|
{
|
|
return get_int_property(device, CFSTR(kIOHIDLocationIDKey));
|
|
}
|
|
|
|
static int32_t get_usage(IOHIDDeviceRef device)
|
|
{
|
|
int32_t res;
|
|
res = get_int_property(device, CFSTR(kIOHIDDeviceUsageKey));
|
|
if (!res)
|
|
res = get_int_property(device, CFSTR(kIOHIDPrimaryUsageKey));
|
|
return res;
|
|
}
|
|
|
|
static int32_t get_usage_page(IOHIDDeviceRef device)
|
|
{
|
|
int32_t res;
|
|
res = get_int_property(device, CFSTR(kIOHIDDeviceUsagePageKey));
|
|
if (!res)
|
|
res = get_int_property(device, CFSTR(kIOHIDPrimaryUsagePageKey));
|
|
return res;
|
|
}
|
|
|
|
static int get_transport(IOHIDDeviceRef device, wchar_t *buf, size_t len)
|
|
{
|
|
return get_string_property(device, CFSTR(kIOHIDTransportKey), buf, len);
|
|
}
|
|
|
|
|
|
int main(void)
|
|
{
|
|
IOHIDManagerRef mgr;
|
|
int i;
|
|
|
|
mgr = IOHIDManagerCreate(kCFAllocatorDefault, kIOHIDOptionsTypeNone);
|
|
IOHIDManagerSetDeviceMatching(mgr, NULL);
|
|
IOHIDManagerOpen(mgr, kIOHIDOptionsTypeNone);
|
|
|
|
CFSetRef device_set = IOHIDManagerCopyDevices(mgr);
|
|
|
|
CFIndex num_devices = CFSetGetCount(device_set);
|
|
IOHIDDeviceRef *device_array = calloc(num_devices, sizeof(IOHIDDeviceRef));
|
|
CFSetGetValues(device_set, (const void **) device_array);
|
|
|
|
for (i = 0; i < num_devices; i++) {
|
|
IOHIDDeviceRef dev = device_array[i];
|
|
printf("Device: %p\n", dev);
|
|
printf(" %04hx %04hx\n", get_vendor_id(dev), get_product_id(dev));
|
|
|
|
wchar_t serial[256], buf[256];
|
|
char cbuf[256];
|
|
get_serial_number(dev, serial, 256);
|
|
|
|
|
|
printf(" Serial: %ls\n", serial);
|
|
printf(" Loc: %ld\n", get_location_id(dev));
|
|
get_transport(dev, buf, 256);
|
|
printf(" Trans: %ls\n", buf);
|
|
make_path(dev, cbuf, 256);
|
|
printf(" Path: %s\n", cbuf);
|
|
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
|
|
#else //Linux
|
|
|
|
/*******************************************************
|
|
HIDAPI - Multi-Platform library for
|
|
communication with HID devices.
|
|
|
|
Alan Ott
|
|
Signal 11 Software
|
|
|
|
8/22/2009
|
|
Linux Version - 6/2/2009
|
|
|
|
Copyright 2009, All Rights Reserved.
|
|
|
|
At the discretion of the user of this library,
|
|
this software may be licensed under the terms of the
|
|
GNU General Public License v3, a BSD-Style license, or the
|
|
original HIDAPI license as outlined in the LICENSE.txt,
|
|
LICENSE-gpl3.txt, LICENSE-bsd.txt, and LICENSE-orig.txt
|
|
files located at the root of the source distribution.
|
|
These files may also be found in the public source
|
|
code repository located at:
|
|
http://github.com/signal11/hidapi .
|
|
********************************************************/
|
|
|
|
/* C */
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <locale.h>
|
|
#include <errno.h>
|
|
|
|
/* Unix */
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/utsname.h>
|
|
#include <fcntl.h>
|
|
#include <poll.h>
|
|
|
|
/* Linux */
|
|
#include <linux/hidraw.h>
|
|
#include <linux/version.h>
|
|
#include <linux/input.h>
|
|
#include <libudev.h>
|
|
|
|
#include "hidapi.h"
|
|
|
|
/* Definitions from linux/hidraw.h. Since these are new, some distros
|
|
may not have header files which contain them. */
|
|
#ifndef HIDIOCSFEATURE
|
|
#define HIDIOCSFEATURE(len) _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x06, len)
|
|
#endif
|
|
#ifndef HIDIOCGFEATURE
|
|
#define HIDIOCGFEATURE(len) _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x07, len)
|
|
#endif
|
|
|
|
|
|
/* USB HID device property names */
|
|
const char *device_string_names[] = {
|
|
"manufacturer",
|
|
"product",
|
|
"serial",
|
|
};
|
|
|
|
/* Symbolic names for the properties above */
|
|
enum device_string_id {
|
|
DEVICE_STRING_MANUFACTURER,
|
|
DEVICE_STRING_PRODUCT,
|
|
DEVICE_STRING_SERIAL,
|
|
|
|
DEVICE_STRING_COUNT,
|
|
};
|
|
|
|
struct hid_device_ {
|
|
int device_handle;
|
|
int blocking;
|
|
int uses_numbered_reports;
|
|
};
|
|
|
|
|
|
static __u32 kernel_version = 0;
|
|
|
|
static __u32 detect_kernel_version(void)
|
|
{
|
|
struct utsname name;
|
|
int major, minor, release;
|
|
int ret;
|
|
|
|
uname(&name);
|
|
ret = sscanf(name.release, "%d.%d.%d", &major, &minor, &release);
|
|
if (ret == 3) {
|
|
return KERNEL_VERSION(major, minor, release);
|
|
}
|
|
|
|
ret = sscanf(name.release, "%d.%d", &major, &minor);
|
|
if (ret == 2) {
|
|
return KERNEL_VERSION(major, minor, 0);
|
|
}
|
|
|
|
printf("Couldn't determine kernel version from version string \"%s\"\n", name.release);
|
|
return 0;
|
|
}
|
|
|
|
static hid_device *new_hid_device(void)
|
|
{
|
|
hid_device *dev = calloc(1, sizeof(hid_device));
|
|
dev->device_handle = -1;
|
|
dev->blocking = 1;
|
|
dev->uses_numbered_reports = 0;
|
|
|
|
return dev;
|
|
}
|
|
|
|
|
|
/* The caller must free the returned string with free(). */
|
|
static wchar_t *utf8_to_wchar_t(const char *utf8)
|
|
{
|
|
wchar_t *ret = NULL;
|
|
|
|
if (utf8) {
|
|
size_t wlen = mbstowcs(NULL, utf8, 0);
|
|
if ((size_t) -1 == wlen) {
|
|
return wcsdup(L"");
|
|
}
|
|
ret = calloc(wlen+1, sizeof(wchar_t));
|
|
mbstowcs(ret, utf8, wlen+1);
|
|
ret[wlen] = 0x0000;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Get an attribute value from a udev_device and return it as a whar_t
|
|
string. The returned string must be freed with free() when done.*/
|
|
static wchar_t *copy_udev_string(struct udev_device *dev, const char *udev_name)
|
|
{
|
|
return utf8_to_wchar_t(udev_device_get_sysattr_value(dev, udev_name));
|
|
}
|
|
|
|
/* uses_numbered_reports() returns 1 if report_descriptor describes a device
|
|
which contains numbered reports. */
|
|
static int uses_numbered_reports(__u8 *report_descriptor, __u32 size) {
|
|
unsigned int i = 0;
|
|
int size_code;
|
|
int data_len, key_size;
|
|
|
|
while (i < size) {
|
|
int key = report_descriptor[i];
|
|
|
|
/* Check for the Report ID key */
|
|
if (key == 0x85/*Report ID*/) {
|
|
/* This device has a Report ID, which means it uses
|
|
numbered reports. */
|
|
return 1;
|
|
}
|
|
|
|
//printf("key: %02hhx\n", key);
|
|
|
|
if ((key & 0xf0) == 0xf0) {
|
|
/* This is a Long Item. The next byte contains the
|
|
length of the data section (value) for this key.
|
|
See the HID specification, version 1.11, section
|
|
6.2.2.3, titled "Long Items." */
|
|
if (i+1 < size)
|
|
data_len = report_descriptor[i+1];
|
|
else
|
|
data_len = 0; /* malformed report */
|
|
key_size = 3;
|
|
}
|
|
else {
|
|
/* This is a Short Item. The bottom two bits of the
|
|
key contain the size code for the data section
|
|
(value) for this key. Refer to the HID
|
|
specification, version 1.11, section 6.2.2.2,
|
|
titled "Short Items." */
|
|
size_code = key & 0x3;
|
|
switch (size_code) {
|
|
case 0:
|
|
case 1:
|
|
case 2:
|
|
data_len = size_code;
|
|
break;
|
|
case 3:
|
|
data_len = 4;
|
|
break;
|
|
default:
|
|
/* Can't ever happen since size_code is & 0x3 */
|
|
data_len = 0;
|
|
break;
|
|
};
|
|
key_size = 1;
|
|
}
|
|
|
|
/* Skip over this key and it's associated data */
|
|
i += data_len + key_size;
|
|
}
|
|
|
|
/* Didn't find a Report ID key. Device doesn't use numbered reports. */
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The caller is responsible for free()ing the (newly-allocated) character
|
|
* strings pointed to by serial_number_utf8 and product_name_utf8 after use.
|
|
*/
|
|
static int
|
|
parse_uevent_info(const char *uevent, int *bus_type,
|
|
unsigned short *vendor_id, unsigned short *product_id,
|
|
char **serial_number_utf8, char **product_name_utf8)
|
|
{
|
|
char *tmp = strdup(uevent);
|
|
char *saveptr = NULL;
|
|
char *line;
|
|
char *key;
|
|
char *value;
|
|
|
|
int found_id = 0;
|
|
int found_serial = 0;
|
|
int found_name = 0;
|
|
|
|
line = strtok_r(tmp, "\n", &saveptr);
|
|
while (line != NULL) {
|
|
/* line: "KEY=value" */
|
|
key = line;
|
|
value = strchr(line, '=');
|
|
if (!value) {
|
|
goto next_line;
|
|
}
|
|
*value = '\0';
|
|
value++;
|
|
|
|
if (strcmp(key, "HID_ID") == 0) {
|
|
/**
|
|
* type vendor product
|
|
* HID_ID=0003:000005AC:00008242
|
|
**/
|
|
int ret = sscanf(value, "%x:%hx:%hx", bus_type, vendor_id, product_id);
|
|
if (ret == 3) {
|
|
found_id = 1;
|
|
}
|
|
} else if (strcmp(key, "HID_NAME") == 0) {
|
|
/* The caller has to free the product name */
|
|
*product_name_utf8 = strdup(value);
|
|
found_name = 1;
|
|
} else if (strcmp(key, "HID_UNIQ") == 0) {
|
|
/* The caller has to free the serial number */
|
|
*serial_number_utf8 = strdup(value);
|
|
found_serial = 1;
|
|
}
|
|
|
|
next_line:
|
|
line = strtok_r(NULL, "\n", &saveptr);
|
|
}
|
|
|
|
free(tmp);
|
|
return (found_id && found_name && found_serial);
|
|
}
|
|
|
|
|
|
static int get_device_string(hid_device *dev, enum device_string_id key, wchar_t *string, size_t maxlen)
|
|
{
|
|
struct udev *udev;
|
|
struct udev_device *udev_dev, *parent, *hid_dev;
|
|
struct stat s;
|
|
int ret = -1;
|
|
char *serial_number_utf8 = NULL;
|
|
char *product_name_utf8 = NULL;
|
|
|
|
/* Create the udev object */
|
|
udev = udev_new();
|
|
if (!udev) {
|
|
printf("Can't create udev\n");
|
|
return -1;
|
|
}
|
|
|
|
/* Get the dev_t (major/minor numbers) from the file handle. */
|
|
ret = fstat(dev->device_handle, &s);
|
|
if (-1 == ret)
|
|
return ret;
|
|
/* Open a udev device from the dev_t. 'c' means character device. */
|
|
udev_dev = udev_device_new_from_devnum(udev, 'c', s.st_rdev);
|
|
if (udev_dev) {
|
|
hid_dev = udev_device_get_parent_with_subsystem_devtype(
|
|
udev_dev,
|
|
"hid",
|
|
NULL);
|
|
if (hid_dev) {
|
|
unsigned short dev_vid;
|
|
unsigned short dev_pid;
|
|
int bus_type;
|
|
size_t retm;
|
|
|
|
ret = parse_uevent_info(
|
|
udev_device_get_sysattr_value(hid_dev, "uevent"),
|
|
&bus_type,
|
|
&dev_vid,
|
|
&dev_pid,
|
|
&serial_number_utf8,
|
|
&product_name_utf8);
|
|
|
|
if (bus_type == BUS_BLUETOOTH) {
|
|
switch (key) {
|
|
case DEVICE_STRING_MANUFACTURER:
|
|
wcsncpy(string, L"", maxlen);
|
|
ret = 0;
|
|
break;
|
|
case DEVICE_STRING_PRODUCT:
|
|
retm = mbstowcs(string, product_name_utf8, maxlen);
|
|
ret = (retm == (size_t)-1)? -1: 0;
|
|
break;
|
|
case DEVICE_STRING_SERIAL:
|
|
retm = mbstowcs(string, serial_number_utf8, maxlen);
|
|
ret = (retm == (size_t)-1)? -1: 0;
|
|
break;
|
|
case DEVICE_STRING_COUNT:
|
|
default:
|
|
ret = -1;
|
|
break;
|
|
}
|
|
}
|
|
else {
|
|
/* This is a USB device. Find its parent USB Device node. */
|
|
parent = udev_device_get_parent_with_subsystem_devtype(
|
|
udev_dev,
|
|
"usb",
|
|
"usb_device");
|
|
if (parent) {
|
|
const char *str;
|
|
const char *key_str = NULL;
|
|
|
|
if (key >= 0 && key < DEVICE_STRING_COUNT) {
|
|
key_str = device_string_names[key];
|
|
} else {
|
|
ret = -1;
|
|
goto end;
|
|
}
|
|
|
|
str = udev_device_get_sysattr_value(parent, key_str);
|
|
if (str) {
|
|
/* Convert the string from UTF-8 to wchar_t */
|
|
retm = mbstowcs(string, str, maxlen);
|
|
ret = (retm == (size_t)-1)? -1: 0;
|
|
goto end;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
end:
|
|
free(serial_number_utf8);
|
|
free(product_name_utf8);
|
|
|
|
udev_device_unref(udev_dev);
|
|
/* parent and hid_dev don't need to be (and can't be) unref'd.
|
|
I'm not sure why, but they'll throw double-free() errors. */
|
|
udev_unref(udev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int HID_API_EXPORT hid_init(void)
|
|
{
|
|
const char *locale;
|
|
|
|
/* Set the locale if it's not set. */
|
|
locale = setlocale(LC_CTYPE, NULL);
|
|
if (!locale)
|
|
setlocale(LC_CTYPE, "");
|
|
|
|
kernel_version = detect_kernel_version();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int HID_API_EXPORT hid_exit(void)
|
|
{
|
|
/* Nothing to do for this in the Linux/hidraw implementation. */
|
|
return 0;
|
|
}
|
|
|
|
|
|
struct hid_device_info HID_API_EXPORT *hid_enumerate(unsigned short vendor_id, unsigned short product_id)
|
|
{
|
|
struct udev *udev;
|
|
struct udev_enumerate *enumerate;
|
|
struct udev_list_entry *devices, *dev_list_entry;
|
|
|
|
struct hid_device_info *root = NULL; /* return object */
|
|
struct hid_device_info *cur_dev = NULL;
|
|
struct hid_device_info *prev_dev = NULL; /* previous device */
|
|
|
|
hid_init();
|
|
|
|
/* Create the udev object */
|
|
udev = udev_new();
|
|
if (!udev) {
|
|
printf("Can't create udev\n");
|
|
return NULL;
|
|
}
|
|
|
|
/* Create a list of the devices in the 'hidraw' subsystem. */
|
|
enumerate = udev_enumerate_new(udev);
|
|
udev_enumerate_add_match_subsystem(enumerate, "hidraw");
|
|
udev_enumerate_scan_devices(enumerate);
|
|
devices = udev_enumerate_get_list_entry(enumerate);
|
|
/* For each item, see if it matches the vid/pid, and if so
|
|
create a udev_device record for it */
|
|
udev_list_entry_foreach(dev_list_entry, devices) {
|
|
const char *sysfs_path;
|
|
const char *dev_path;
|
|
const char *str;
|
|
struct udev_device *raw_dev; /* The device's hidraw udev node. */
|
|
struct udev_device *hid_dev; /* The device's HID udev node. */
|
|
struct udev_device *usb_dev; /* The device's USB udev node. */
|
|
struct udev_device *intf_dev; /* The device's interface (in the USB sense). */
|
|
unsigned short dev_vid;
|
|
unsigned short dev_pid;
|
|
char *serial_number_utf8 = NULL;
|
|
char *product_name_utf8 = NULL;
|
|
int bus_type;
|
|
int result;
|
|
|
|
/* Get the filename of the /sys entry for the device
|
|
and create a udev_device object (dev) representing it */
|
|
sysfs_path = udev_list_entry_get_name(dev_list_entry);
|
|
raw_dev = udev_device_new_from_syspath(udev, sysfs_path);
|
|
dev_path = udev_device_get_devnode(raw_dev);
|
|
|
|
hid_dev = udev_device_get_parent_with_subsystem_devtype(
|
|
raw_dev,
|
|
"hid",
|
|
NULL);
|
|
|
|
if (!hid_dev) {
|
|
/* Unable to find parent hid device. */
|
|
goto next;
|
|
}
|
|
|
|
result = parse_uevent_info(
|
|
udev_device_get_sysattr_value(hid_dev, "uevent"),
|
|
&bus_type,
|
|
&dev_vid,
|
|
&dev_pid,
|
|
&serial_number_utf8,
|
|
&product_name_utf8);
|
|
|
|
if (!result) {
|
|
/* parse_uevent_info() failed for at least one field. */
|
|
goto next;
|
|
}
|
|
|
|
if (bus_type != BUS_USB && bus_type != BUS_BLUETOOTH) {
|
|
/* We only know how to handle USB and BT devices. */
|
|
goto next;
|
|
}
|
|
|
|
/* Check the VID/PID against the arguments */
|
|
if ((vendor_id == 0x0 || vendor_id == dev_vid) &&
|
|
(product_id == 0x0 || product_id == dev_pid)) {
|
|
struct hid_device_info *tmp;
|
|
|
|
/* VID/PID match. Create the record. */
|
|
tmp = malloc(sizeof(struct hid_device_info));
|
|
if (cur_dev) {
|
|
cur_dev->next = tmp;
|
|
}
|
|
else {
|
|
root = tmp;
|
|
}
|
|
prev_dev = cur_dev;
|
|
cur_dev = tmp;
|
|
|
|
/* Fill out the record */
|
|
cur_dev->next = NULL;
|
|
cur_dev->path = dev_path? strdup(dev_path): NULL;
|
|
|
|
/* VID/PID */
|
|
cur_dev->vendor_id = dev_vid;
|
|
cur_dev->product_id = dev_pid;
|
|
|
|
/* Serial Number */
|
|
cur_dev->serial_number = utf8_to_wchar_t(serial_number_utf8);
|
|
|
|
/* Release Number */
|
|
cur_dev->release_number = 0x0;
|
|
|
|
/* Interface Number */
|
|
cur_dev->interface_number = -1;
|
|
|
|
switch (bus_type) {
|
|
case BUS_USB:
|
|
/* The device pointed to by raw_dev contains information about
|
|
the hidraw device. In order to get information about the
|
|
USB device, get the parent device with the
|
|
subsystem/devtype pair of "usb"/"usb_device". This will
|
|
be several levels up the tree, but the function will find
|
|
it. */
|
|
usb_dev = udev_device_get_parent_with_subsystem_devtype(
|
|
raw_dev,
|
|
"usb",
|
|
"usb_device");
|
|
|
|
if (!usb_dev) {
|
|
/* Free this device */
|
|
free(cur_dev->serial_number);
|
|
free(cur_dev->path);
|
|
free(cur_dev);
|
|
|
|
/* Take it off the device list. */
|
|
if (prev_dev) {
|
|
prev_dev->next = NULL;
|
|
cur_dev = prev_dev;
|
|
}
|
|
else {
|
|
cur_dev = root = NULL;
|
|
}
|
|
|
|
goto next;
|
|
}
|
|
|
|
/* Manufacturer and Product strings */
|
|
cur_dev->manufacturer_string = copy_udev_string(usb_dev, device_string_names[DEVICE_STRING_MANUFACTURER]);
|
|
cur_dev->product_string = copy_udev_string(usb_dev, device_string_names[DEVICE_STRING_PRODUCT]);
|
|
|
|
/* Release Number */
|
|
str = udev_device_get_sysattr_value(usb_dev, "bcdDevice");
|
|
cur_dev->release_number = (str)? strtol(str, NULL, 16): 0x0;
|
|
|
|
/* Get a handle to the interface's udev node. */
|
|
intf_dev = udev_device_get_parent_with_subsystem_devtype(
|
|
raw_dev,
|
|
"usb",
|
|
"usb_interface");
|
|
if (intf_dev) {
|
|
str = udev_device_get_sysattr_value(intf_dev, "bInterfaceNumber");
|
|
cur_dev->interface_number = (str)? strtol(str, NULL, 16): -1;
|
|
}
|
|
|
|
break;
|
|
|
|
case BUS_BLUETOOTH:
|
|
/* Manufacturer and Product strings */
|
|
cur_dev->manufacturer_string = wcsdup(L"");
|
|
cur_dev->product_string = utf8_to_wchar_t(product_name_utf8);
|
|
|
|
break;
|
|
|
|
default:
|
|
/* Unknown device type - this should never happen, as we
|
|
* check for USB and Bluetooth devices above */
|
|
break;
|
|
}
|
|
}
|
|
|
|
next:
|
|
free(serial_number_utf8);
|
|
free(product_name_utf8);
|
|
udev_device_unref(raw_dev);
|
|
/* hid_dev, usb_dev and intf_dev don't need to be (and can't be)
|
|
unref()d. It will cause a double-free() error. I'm not
|
|
sure why. */
|
|
}
|
|
/* Free the enumerator and udev objects. */
|
|
udev_enumerate_unref(enumerate);
|
|
udev_unref(udev);
|
|
|
|
return root;
|
|
}
|
|
|
|
void HID_API_EXPORT hid_free_enumeration(struct hid_device_info *devs)
|
|
{
|
|
struct hid_device_info *d = devs;
|
|
while (d) {
|
|
struct hid_device_info *next = d->next;
|
|
free(d->path);
|
|
free(d->serial_number);
|
|
free(d->manufacturer_string);
|
|
free(d->product_string);
|
|
free(d);
|
|
d = next;
|
|
}
|
|
}
|
|
|
|
hid_device * hid_open(unsigned short vendor_id, unsigned short product_id, const wchar_t *serial_number)
|
|
{
|
|
struct hid_device_info *devs, *cur_dev;
|
|
const char *path_to_open = NULL;
|
|
hid_device *handle = NULL;
|
|
|
|
devs = hid_enumerate(vendor_id, product_id);
|
|
cur_dev = devs;
|
|
while (cur_dev) {
|
|
if (cur_dev->vendor_id == vendor_id &&
|
|
cur_dev->product_id == product_id) {
|
|
if (serial_number) {
|
|
if (wcscmp(serial_number, cur_dev->serial_number) == 0) {
|
|
path_to_open = cur_dev->path;
|
|
break;
|
|
}
|
|
}
|
|
else {
|
|
path_to_open = cur_dev->path;
|
|
break;
|
|
}
|
|
}
|
|
cur_dev = cur_dev->next;
|
|
}
|
|
|
|
if (path_to_open) {
|
|
/* Open the device */
|
|
handle = hid_open_path(path_to_open);
|
|
}
|
|
|
|
hid_free_enumeration(devs);
|
|
|
|
return handle;
|
|
}
|
|
|
|
hid_device * HID_API_EXPORT hid_open_path(const char *path)
|
|
{
|
|
hid_device *dev = NULL;
|
|
|
|
hid_init();
|
|
|
|
dev = new_hid_device();
|
|
|
|
/* OPEN HERE */
|
|
dev->device_handle = open(path, O_RDWR);
|
|
|
|
/* If we have a good handle, return it. */
|
|
if (dev->device_handle > 0) {
|
|
|
|
/* Get the report descriptor */
|
|
int res, desc_size = 0;
|
|
struct hidraw_report_descriptor rpt_desc;
|
|
|
|
memset(&rpt_desc, 0x0, sizeof(rpt_desc));
|
|
|
|
/* Get Report Descriptor Size */
|
|
res = ioctl(dev->device_handle, HIDIOCGRDESCSIZE, &desc_size);
|
|
if (res < 0)
|
|
perror("HIDIOCGRDESCSIZE");
|
|
|
|
|
|
/* Get Report Descriptor */
|
|
rpt_desc.size = desc_size;
|
|
res = ioctl(dev->device_handle, HIDIOCGRDESC, &rpt_desc);
|
|
if (res < 0) {
|
|
perror("HIDIOCGRDESC");
|
|
} else {
|
|
/* Determine if this device uses numbered reports. */
|
|
dev->uses_numbered_reports =
|
|
uses_numbered_reports(rpt_desc.value,
|
|
rpt_desc.size);
|
|
}
|
|
|
|
return dev;
|
|
}
|
|
else {
|
|
/* Unable to open any devices. */
|
|
free(dev);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
|
|
int HID_API_EXPORT hid_write(hid_device *dev, const unsigned char *data, size_t length)
|
|
{
|
|
int bytes_written;
|
|
|
|
bytes_written = write(dev->device_handle, data, length);
|
|
|
|
return bytes_written;
|
|
}
|
|
|
|
|
|
int HID_API_EXPORT hid_read_timeout(hid_device *dev, unsigned char *data, size_t length, int milliseconds)
|
|
{
|
|
int bytes_read;
|
|
|
|
if (milliseconds >= 0) {
|
|
/* Milliseconds is either 0 (non-blocking) or > 0 (contains
|
|
a valid timeout). In both cases we want to call poll()
|
|
and wait for data to arrive. Don't rely on non-blocking
|
|
operation (O_NONBLOCK) since some kernels don't seem to
|
|
properly report device disconnection through read() when
|
|
in non-blocking mode. */
|
|
int ret;
|
|
struct pollfd fds;
|
|
|
|
fds.fd = dev->device_handle;
|
|
fds.events = POLLIN;
|
|
fds.revents = 0;
|
|
ret = poll(&fds, 1, milliseconds);
|
|
if (ret == -1 || ret == 0) {
|
|
/* Error or timeout */
|
|
return ret;
|
|
}
|
|
else {
|
|
/* Check for errors on the file descriptor. This will
|
|
indicate a device disconnection. */
|
|
if (fds.revents & (POLLERR | POLLHUP | POLLNVAL))
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
bytes_read = read(dev->device_handle, data, length);
|
|
if (bytes_read < 0 && (errno == EAGAIN || errno == EINPROGRESS))
|
|
bytes_read = 0;
|
|
|
|
if (bytes_read >= 0 &&
|
|
kernel_version != 0 &&
|
|
kernel_version < KERNEL_VERSION(2,6,34) &&
|
|
dev->uses_numbered_reports) {
|
|
/* Work around a kernel bug. Chop off the first byte. */
|
|
memmove(data, data+1, bytes_read);
|
|
bytes_read--;
|
|
}
|
|
|
|
return bytes_read;
|
|
}
|
|
|
|
int HID_API_EXPORT hid_read(hid_device *dev, unsigned char *data, size_t length)
|
|
{
|
|
return hid_read_timeout(dev, data, length, (dev->blocking)? -1: 0);
|
|
}
|
|
|
|
int HID_API_EXPORT hid_set_nonblocking(hid_device *dev, int nonblock)
|
|
{
|
|
/* Do all non-blocking in userspace using poll(), since it looks
|
|
like there's a bug in the kernel in some versions where
|
|
read() will not return -1 on disconnection of the USB device */
|
|
|
|
dev->blocking = !nonblock;
|
|
return 0; /* Success */
|
|
}
|
|
|
|
|
|
int HID_API_EXPORT hid_send_feature_report(hid_device *dev, const unsigned char *data, size_t length)
|
|
{
|
|
int res;
|
|
|
|
res = ioctl(dev->device_handle, HIDIOCSFEATURE(length), data);
|
|
if (res < 0)
|
|
perror("ioctl (SFEATURE)");
|
|
|
|
return res;
|
|
}
|
|
|
|
int HID_API_EXPORT hid_get_feature_report(hid_device *dev, unsigned char *data, size_t length)
|
|
{
|
|
int res;
|
|
|
|
res = ioctl(dev->device_handle, HIDIOCGFEATURE(length), data);
|
|
if (res < 0)
|
|
perror("ioctl (GFEATURE)");
|
|
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
void HID_API_EXPORT hid_close(hid_device *dev)
|
|
{
|
|
if (!dev)
|
|
return;
|
|
close(dev->device_handle);
|
|
free(dev);
|
|
}
|
|
|
|
|
|
int HID_API_EXPORT_CALL hid_get_manufacturer_string(hid_device *dev, wchar_t *string, size_t maxlen)
|
|
{
|
|
return get_device_string(dev, DEVICE_STRING_MANUFACTURER, string, maxlen);
|
|
}
|
|
|
|
int HID_API_EXPORT_CALL hid_get_product_string(hid_device *dev, wchar_t *string, size_t maxlen)
|
|
{
|
|
return get_device_string(dev, DEVICE_STRING_PRODUCT, string, maxlen);
|
|
}
|
|
|
|
int HID_API_EXPORT_CALL hid_get_serial_number_string(hid_device *dev, wchar_t *string, size_t maxlen)
|
|
{
|
|
return get_device_string(dev, DEVICE_STRING_SERIAL, string, maxlen);
|
|
}
|
|
|
|
int HID_API_EXPORT_CALL hid_get_indexed_string(hid_device *dev, int string_index, wchar_t *string, size_t maxlen)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
|
|
HID_API_EXPORT const wchar_t * HID_API_CALL hid_error(hid_device *dev)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
|
|
#endif
|
|
|