1 /* 2 * Windows backend common header for libusbx 1.0 3 * 4 * This file brings together header code common between 5 * the desktop Windows and Windows CE backends. 6 * Copyright © 2012-2013 RealVNC Ltd. 7 * Copyright © 2009-2012 Pete Batard <pete@akeo.ie> 8 * With contributions from Michael Plante, Orin Eman et al. 9 * Parts of this code adapted from libusb-win32-v1 by Stephan Meyer 10 * Major code testing contribution by Xiaofan Chen 11 * 12 * This library is free software; you can redistribute it and/or 13 * modify it under the terms of the GNU Lesser General Public 14 * License as published by the Free Software Foundation; either 15 * version 2.1 of the License, or (at your option) any later version. 16 * 17 * This library is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 20 * Lesser General Public License for more details. 21 * 22 * You should have received a copy of the GNU Lesser General Public 23 * License along with this library; if not, write to the Free Software 24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 25 */ 26 27 #pragma once 28 29 // Windows API default is uppercase - ugh! 30 #if !defined(bool) 31 #define bool BOOL 32 #endif 33 #if !defined(true) 34 #define true TRUE 35 #endif 36 #if !defined(false) 37 #define false FALSE 38 #endif 39 40 #define safe_free(p) do {if (p != NULL) {free((void*)p); p = NULL;}} while(0) 41 #define safe_closehandle(h) do {if (h != INVALID_HANDLE_VALUE) {CloseHandle(h); h = INVALID_HANDLE_VALUE;}} while(0) 42 #define safe_min(a, b) min((size_t)(a), (size_t)(b)) 43 #define safe_strcp(dst, dst_max, src, count) do {memcpy(dst, src, safe_min(count, dst_max)); \ 44 ((char*)dst)[safe_min(count, dst_max)-1] = 0;} while(0) 45 #define safe_strcpy(dst, dst_max, src) safe_strcp(dst, dst_max, src, safe_strlen(src)+1) 46 #define safe_strncat(dst, dst_max, src, count) strncat(dst, src, safe_min(count, dst_max - safe_strlen(dst) - 1)) 47 #define safe_strcat(dst, dst_max, src) safe_strncat(dst, dst_max, src, safe_strlen(src)+1) 48 #define safe_strcmp(str1, str2) strcmp(((str1==NULL)?"<NULL>":str1), ((str2==NULL)?"<NULL>":str2)) 49 #define safe_stricmp(str1, str2) _stricmp(((str1==NULL)?"<NULL>":str1), ((str2==NULL)?"<NULL>":str2)) 50 #define safe_strncmp(str1, str2, count) strncmp(((str1==NULL)?"<NULL>":str1), ((str2==NULL)?"<NULL>":str2), count) 51 #define safe_strlen(str) ((str==NULL)?0:strlen(str)) 52 #define safe_sprintf(dst, count, ...) do {_snprintf(dst, count, __VA_ARGS__); (dst)[(count)-1] = 0; } while(0) 53 #define safe_stprintf _sntprintf 54 #define safe_tcslen(str) ((str==NULL)?0:_tcslen(str)) 55 #define safe_unref_device(dev) do {if (dev != NULL) {libusb_unref_device(dev); dev = NULL;}} while(0) 56 #define wchar_to_utf8_ms(wstr, str, strlen) WideCharToMultiByte(CP_UTF8, 0, wstr, -1, str, strlen, NULL, NULL) 57 #ifndef ARRAYSIZE 58 #define ARRAYSIZE(A) (sizeof(A)/sizeof((A)[0])) 59 #endif 60 61 #define ERR_BUFFER_SIZE 256 62 #define TIMER_REQUEST_RETRY_MS 100 63 #define MAX_TIMER_SEMAPHORES 128 64 65 66 /* 67 * API macros - from libusb-win32 1.x 68 */ 69 #define DLL_DECLARE_PREFIXNAME(api, ret, prefixname, name, args) \ 70 typedef ret (api * __dll_##name##_t)args; \ 71 static __dll_##name##_t prefixname = NULL 72 73 #ifndef _WIN32_WCE 74 #define DLL_STRINGIFY(dll) #dll 75 #define DLL_GET_MODULE_HANDLE(dll) GetModuleHandleA(DLL_STRINGIFY(dll)) 76 #define DLL_LOAD_LIBRARY(dll) LoadLibraryA(DLL_STRINGIFY(dll)) 77 #else 78 #define DLL_STRINGIFY(dll) L#dll 79 #define DLL_GET_MODULE_HANDLE(dll) GetModuleHandle(DLL_STRINGIFY(dll)) 80 #define DLL_LOAD_LIBRARY(dll) LoadLibrary(DLL_STRINGIFY(dll)) 81 #endif 82 83 #define DLL_LOAD_PREFIXNAME(dll, prefixname, name, ret_on_failure) \ 84 do { \ 85 HMODULE h = DLL_GET_MODULE_HANDLE(dll); \ 86 if (!h) \ 87 h = DLL_LOAD_LIBRARY(dll); \ 88 if (!h) { \ 89 if (ret_on_failure) { return LIBUSB_ERROR_NOT_FOUND; } \ 90 else { break; } \ 91 } \ 92 prefixname = (__dll_##name##_t)GetProcAddress(h, \ 93 DLL_STRINGIFY(name)); \ 94 if (prefixname) break; \ 95 prefixname = (__dll_##name##_t)GetProcAddress(h, \ 96 DLL_STRINGIFY(name) DLL_STRINGIFY(A)); \ 97 if (prefixname) break; \ 98 prefixname = (__dll_##name##_t)GetProcAddress(h, \ 99 DLL_STRINGIFY(name) DLL_STRINGIFY(W)); \ 100 if (prefixname) break; \ 101 if(ret_on_failure) \ 102 return LIBUSB_ERROR_NOT_FOUND; \ 103 } while(0) 104 105 #define DLL_DECLARE(api, ret, name, args) DLL_DECLARE_PREFIXNAME(api, ret, name, name, args) 106 #define DLL_LOAD(dll, name, ret_on_failure) DLL_LOAD_PREFIXNAME(dll, name, name, ret_on_failure) 107 #define DLL_DECLARE_PREFIXED(api, ret, prefix, name, args) DLL_DECLARE_PREFIXNAME(api, ret, prefix##name, name, args) 108 #define DLL_LOAD_PREFIXED(dll, prefix, name, ret_on_failure) DLL_LOAD_PREFIXNAME(dll, prefix##name, name, ret_on_failure) 109