| // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| #include "bin/extensions.h" |
| |
| #include <stdio.h> |
| |
| #include "include/dart_api.h" |
| #include "platform/assert.h" |
| #include "platform/globals.h" |
| #include "bin/dartutils.h" |
| #include "bin/file.h" |
| |
| |
| namespace dart { |
| namespace bin { |
| |
| Dart_Handle Extensions::LoadExtension(const char* extension_directory, |
| const char* extension_file, |
| const char* extension_name, |
| Dart_Handle parent_library) { |
| if (strncmp(extension_directory, "http://", 7) == 0 || |
| strncmp(extension_directory, "https://", 8) == 0) { |
| return Dart_NewApiError("Cannot load native extensions over http:"); |
| } |
| const char* library_strings[] = { extension_directory, extension_file, NULL }; |
| char* library_file = Concatenate(library_strings); |
| void* library_handle = LoadExtensionLibrary(library_file); |
| free(library_file); |
| if (library_handle == NULL) { |
| return Dart_NewApiError("Cannot find extension library"); |
| } |
| |
| const char* strings[] = { extension_name, "_Init", NULL }; |
| char* init_function_name = Concatenate(strings); |
| typedef Dart_Handle (*InitFunctionType)(Dart_Handle import_map); |
| InitFunctionType fn = reinterpret_cast<InitFunctionType>( |
| ResolveSymbol(library_handle, init_function_name)); |
| free(init_function_name); |
| |
| if (fn == NULL) { |
| return Dart_NewApiError("Cannot find initialization function in extension"); |
| } |
| return (*fn)(parent_library); |
| } |
| |
| |
| // Concatenates a NULL terminated array of strings. |
| // The returned string must be freed. |
| char* Extensions::Concatenate(const char** strings) { |
| int size = 1; // null termination. |
| for (int i = 0; strings[i] != NULL; i++) { |
| size += strlen(strings[i]); |
| } |
| char* result = reinterpret_cast<char*>(malloc(size)); |
| int index = 0; |
| for (int i = 0; strings[i] != NULL; i++) { |
| index += snprintf(result + index, size - index, "%s", strings[i]); |
| } |
| ASSERT(index == size - 1); |
| ASSERT(result[size - 1] == '\0'); |
| return result; |
| } |
| |
| } // namespace bin |
| } // namespace dart |