109 lines
5.3 KiB
C
109 lines
5.3 KiB
C
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/*
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* Windows backend common header for libusbx 1.0
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*
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* This file brings together header code common between
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* the desktop Windows and Windows CE backends.
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* Copyright © 2012-2013 RealVNC Ltd.
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* Copyright © 2009-2012 Pete Batard <pete@akeo.ie>
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* With contributions from Michael Plante, Orin Eman et al.
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* Parts of this code adapted from libusb-win32-v1 by Stephan Meyer
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* Major code testing contribution by Xiaofan Chen
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#pragma once
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// Windows API default is uppercase - ugh!
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#if !defined(bool)
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#define bool BOOL
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#endif
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#if !defined(true)
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#define true TRUE
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#endif
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#if !defined(false)
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#define false FALSE
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#endif
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#define safe_free(p) do {if (p != NULL) {free((void*)p); p = NULL;}} while(0)
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#define safe_closehandle(h) do {if (h != INVALID_HANDLE_VALUE) {CloseHandle(h); h = INVALID_HANDLE_VALUE;}} while(0)
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#define safe_min(a, b) min((size_t)(a), (size_t)(b))
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#define safe_strcp(dst, dst_max, src, count) do {memcpy(dst, src, safe_min(count, dst_max)); \
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((char*)dst)[safe_min(count, dst_max)-1] = 0;} while(0)
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#define safe_strcpy(dst, dst_max, src) safe_strcp(dst, dst_max, src, safe_strlen(src)+1)
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#define safe_strncat(dst, dst_max, src, count) strncat(dst, src, safe_min(count, dst_max - safe_strlen(dst) - 1))
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#define safe_strcat(dst, dst_max, src) safe_strncat(dst, dst_max, src, safe_strlen(src)+1)
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#define safe_strcmp(str1, str2) strcmp(((str1==NULL)?"<NULL>":str1), ((str2==NULL)?"<NULL>":str2))
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#define safe_stricmp(str1, str2) _stricmp(((str1==NULL)?"<NULL>":str1), ((str2==NULL)?"<NULL>":str2))
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#define safe_strncmp(str1, str2, count) strncmp(((str1==NULL)?"<NULL>":str1), ((str2==NULL)?"<NULL>":str2), count)
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#define safe_strlen(str) ((str==NULL)?0:strlen(str))
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#define safe_sprintf(dst, count, ...) do {_snprintf(dst, count, __VA_ARGS__); (dst)[(count)-1] = 0; } while(0)
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#define safe_stprintf _sntprintf
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#define safe_tcslen(str) ((str==NULL)?0:_tcslen(str))
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#define safe_unref_device(dev) do {if (dev != NULL) {libusb_unref_device(dev); dev = NULL;}} while(0)
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#define wchar_to_utf8_ms(wstr, str, strlen) WideCharToMultiByte(CP_UTF8, 0, wstr, -1, str, strlen, NULL, NULL)
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#ifndef ARRAYSIZE
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#define ARRAYSIZE(A) (sizeof(A)/sizeof((A)[0]))
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#endif
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#define ERR_BUFFER_SIZE 256
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#define TIMER_REQUEST_RETRY_MS 100
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#define MAX_TIMER_SEMAPHORES 128
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/*
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* API macros - from libusb-win32 1.x
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*/
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#define DLL_DECLARE_PREFIXNAME(api, ret, prefixname, name, args) \
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typedef ret (api * __dll_##name##_t)args; \
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static __dll_##name##_t prefixname = NULL
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#ifndef _WIN32_WCE
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#define DLL_STRINGIFY(dll) #dll
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#define DLL_GET_MODULE_HANDLE(dll) GetModuleHandleA(DLL_STRINGIFY(dll))
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#define DLL_LOAD_LIBRARY(dll) LoadLibraryA(DLL_STRINGIFY(dll))
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#else
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#define DLL_STRINGIFY(dll) L#dll
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#define DLL_GET_MODULE_HANDLE(dll) GetModuleHandle(DLL_STRINGIFY(dll))
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#define DLL_LOAD_LIBRARY(dll) LoadLibrary(DLL_STRINGIFY(dll))
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#endif
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#define DLL_LOAD_PREFIXNAME(dll, prefixname, name, ret_on_failure) \
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do { \
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HMODULE h = DLL_GET_MODULE_HANDLE(dll); \
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if (!h) \
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h = DLL_LOAD_LIBRARY(dll); \
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if (!h) { \
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if (ret_on_failure) { return LIBUSB_ERROR_NOT_FOUND; } \
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else { break; } \
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} \
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prefixname = (__dll_##name##_t)GetProcAddress(h, \
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DLL_STRINGIFY(name)); \
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if (prefixname) break; \
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prefixname = (__dll_##name##_t)GetProcAddress(h, \
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DLL_STRINGIFY(name) DLL_STRINGIFY(A)); \
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if (prefixname) break; \
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prefixname = (__dll_##name##_t)GetProcAddress(h, \
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DLL_STRINGIFY(name) DLL_STRINGIFY(W)); \
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if (prefixname) break; \
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if(ret_on_failure) \
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return LIBUSB_ERROR_NOT_FOUND; \
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} while(0)
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#define DLL_DECLARE(api, ret, name, args) DLL_DECLARE_PREFIXNAME(api, ret, name, name, args)
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#define DLL_LOAD(dll, name, ret_on_failure) DLL_LOAD_PREFIXNAME(dll, name, name, ret_on_failure)
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#define DLL_DECLARE_PREFIXED(api, ret, prefix, name, args) DLL_DECLARE_PREFIXNAME(api, ret, prefix##name, name, args)
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#define DLL_LOAD_PREFIXED(dll, prefix, name, ret_on_failure) DLL_LOAD_PREFIXNAME(dll, prefix##name, name, ret_on_failure)
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