| /* Copyright Joyent, Inc. and other Node contributors. All rights reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to |
| * deal in the Software without restriction, including without limitation the |
| * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| * sell copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| * IN THE SOFTWARE. |
| */ |
| |
| #include "uv.h" |
| #include "internal.h" |
| |
| static int uv__dlerror(uv_lib_t* lib, const char* filename, DWORD errorno); |
| |
| |
| int uv_dlopen(const char* filename, uv_lib_t* lib) { |
| WCHAR filename_w[32768]; |
| |
| lib->handle = NULL; |
| lib->errmsg = NULL; |
| |
| if (!MultiByteToWideChar(CP_UTF8, |
| 0, |
| filename, |
| -1, |
| filename_w, |
| ARRAY_SIZE(filename_w))) { |
| return uv__dlerror(lib, filename, GetLastError()); |
| } |
| |
| lib->handle = LoadLibraryExW(filename_w, NULL, LOAD_WITH_ALTERED_SEARCH_PATH); |
| if (lib->handle == NULL) { |
| return uv__dlerror(lib, filename, GetLastError()); |
| } |
| |
| return 0; |
| } |
| |
| |
| void uv_dlclose(uv_lib_t* lib) { |
| if (lib->errmsg) { |
| LocalFree((void*)lib->errmsg); |
| lib->errmsg = NULL; |
| } |
| |
| if (lib->handle) { |
| /* Ignore errors. No good way to signal them without leaking memory. */ |
| FreeLibrary(lib->handle); |
| lib->handle = NULL; |
| } |
| } |
| |
| |
| int uv_dlsym(uv_lib_t* lib, const char* name, void** ptr) { |
| *ptr = (void*) GetProcAddress(lib->handle, name); |
| return uv__dlerror(lib, "", *ptr ? 0 : GetLastError()); |
| } |
| |
| |
| const char* uv_dlerror(const uv_lib_t* lib) { |
| return lib->errmsg ? lib->errmsg : "no error"; |
| } |
| |
| |
| static void uv__format_fallback_error(uv_lib_t* lib, int errorno){ |
| DWORD_PTR args[1] = { (DWORD_PTR) errorno }; |
| LPSTR fallback_error = "error: %1!d!"; |
| |
| FormatMessageA(FORMAT_MESSAGE_FROM_STRING | |
| FORMAT_MESSAGE_ARGUMENT_ARRAY | |
| FORMAT_MESSAGE_ALLOCATE_BUFFER, |
| fallback_error, 0, 0, |
| (LPSTR) &lib->errmsg, |
| 0, (va_list*) args); |
| } |
| |
| |
| |
| static int uv__dlerror(uv_lib_t* lib, const char* filename, DWORD errorno) { |
| DWORD_PTR arg; |
| DWORD res; |
| char* msg; |
| |
| if (lib->errmsg) { |
| LocalFree(lib->errmsg); |
| lib->errmsg = NULL; |
| } |
| |
| if (errorno == 0) |
| return 0; |
| |
| res = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | |
| FORMAT_MESSAGE_FROM_SYSTEM | |
| FORMAT_MESSAGE_IGNORE_INSERTS, NULL, errorno, |
| MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US), |
| (LPSTR) &lib->errmsg, 0, NULL); |
| |
| if (!res && GetLastError() == ERROR_MUI_FILE_NOT_FOUND) { |
| res = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | |
| FORMAT_MESSAGE_FROM_SYSTEM | |
| FORMAT_MESSAGE_IGNORE_INSERTS, NULL, errorno, |
| 0, (LPSTR) &lib->errmsg, 0, NULL); |
| } |
| |
| if (res && errorno == ERROR_BAD_EXE_FORMAT && strstr(lib->errmsg, "%1")) { |
| msg = lib->errmsg; |
| lib->errmsg = NULL; |
| arg = (DWORD_PTR) filename; |
| res = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | |
| FORMAT_MESSAGE_ARGUMENT_ARRAY | |
| FORMAT_MESSAGE_FROM_STRING, |
| msg, |
| 0, 0, (LPSTR) &lib->errmsg, 0, (va_list*) &arg); |
| LocalFree(msg); |
| } |
| |
| if (!res) |
| uv__format_fallback_error(lib, errorno); |
| |
| return -1; |
| } |