Cory McWilliams
79022e1e1f
git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@3621 ed5197a5-7fde-0310-b194-c3ffbd925b24
137 lines
4.3 KiB
C
137 lines
4.3 KiB
C
/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "uv.h"
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#include "internal.h"
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static int uv__dlerror(uv_lib_t* lib, const char* filename, DWORD errorno);
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int uv_dlopen(const char* filename, uv_lib_t* lib) {
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WCHAR filename_w[32768];
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lib->handle = NULL;
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lib->errmsg = NULL;
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if (!MultiByteToWideChar(CP_UTF8,
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0,
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filename,
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-1,
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filename_w,
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ARRAY_SIZE(filename_w))) {
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return uv__dlerror(lib, filename, GetLastError());
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}
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lib->handle = LoadLibraryExW(filename_w, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
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if (lib->handle == NULL) {
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return uv__dlerror(lib, filename, GetLastError());
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}
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return 0;
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}
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void uv_dlclose(uv_lib_t* lib) {
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if (lib->errmsg) {
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LocalFree((void*)lib->errmsg);
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lib->errmsg = NULL;
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}
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if (lib->handle) {
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/* Ignore errors. No good way to signal them without leaking memory. */
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FreeLibrary(lib->handle);
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lib->handle = NULL;
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}
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}
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int uv_dlsym(uv_lib_t* lib, const char* name, void** ptr) {
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/* Cast though integer to suppress pedantic warning about forbidden cast. */
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*ptr = (void*)(uintptr_t) GetProcAddress(lib->handle, name);
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return uv__dlerror(lib, "", *ptr ? 0 : GetLastError());
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}
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const char* uv_dlerror(const uv_lib_t* lib) {
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return lib->errmsg ? lib->errmsg : "no error";
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}
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static void uv__format_fallback_error(uv_lib_t* lib, int errorno){
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static const CHAR fallback_error[] = "error: %1!d!";
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DWORD_PTR args[1];
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args[0] = (DWORD_PTR) errorno;
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FormatMessageA(FORMAT_MESSAGE_FROM_STRING |
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FORMAT_MESSAGE_ARGUMENT_ARRAY |
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FORMAT_MESSAGE_ALLOCATE_BUFFER,
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fallback_error, 0, 0,
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(LPSTR) &lib->errmsg,
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0, (va_list*) args);
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}
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static int uv__dlerror(uv_lib_t* lib, const char* filename, DWORD errorno) {
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DWORD_PTR arg;
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DWORD res;
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char* msg;
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if (lib->errmsg) {
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LocalFree(lib->errmsg);
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lib->errmsg = NULL;
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}
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if (errorno == 0)
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return 0;
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res = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER |
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FORMAT_MESSAGE_FROM_SYSTEM |
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FORMAT_MESSAGE_IGNORE_INSERTS, NULL, errorno,
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MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US),
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(LPSTR) &lib->errmsg, 0, NULL);
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if (!res && (GetLastError() == ERROR_MUI_FILE_NOT_FOUND ||
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GetLastError() == ERROR_RESOURCE_TYPE_NOT_FOUND)) {
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res = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER |
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FORMAT_MESSAGE_FROM_SYSTEM |
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FORMAT_MESSAGE_IGNORE_INSERTS, NULL, errorno,
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0, (LPSTR) &lib->errmsg, 0, NULL);
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}
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if (res && errorno == ERROR_BAD_EXE_FORMAT && strstr(lib->errmsg, "%1")) {
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msg = lib->errmsg;
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lib->errmsg = NULL;
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arg = (DWORD_PTR) filename;
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res = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER |
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FORMAT_MESSAGE_ARGUMENT_ARRAY |
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FORMAT_MESSAGE_FROM_STRING,
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msg,
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0, 0, (LPSTR) &lib->errmsg, 0, (va_list*) &arg);
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LocalFree(msg);
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}
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if (!res)
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uv__format_fallback_error(lib, errorno);
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return -1;
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}
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