whesse@google.com
3b7099b7e2
BUG= TEST= Review URL: https://chromiumcodereview.appspot.com//9694045 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@5524 260f80e4-7a28-3924-810f-c04153c831b5
73 lines
2.5 KiB
C++
73 lines
2.5 KiB
C++
// 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"
|
|
|
|
Dart_Handle Extensions::LoadExtension(const char* extension_url,
|
|
Dart_Handle parent_library) {
|
|
ASSERT(DartUtils::IsDartExtensionSchemeURL(extension_url));
|
|
// Make a mutable copy of the extension url, without the "dart:" scheme.
|
|
const char* path_component =
|
|
extension_url + strlen(DartUtils::kDartExtensionScheme);
|
|
#ifdef TARGET_OS_WINDOWS
|
|
// Remove initial '/' from a uri formatted absolute path "/C:/path/to/dll"
|
|
ASSERT(path_component[0] == '/');
|
|
path_component++;
|
|
#endif
|
|
char* library_path = strdup(path_component);
|
|
if (!library_path || !File::IsAbsolutePath(library_path)) {
|
|
free(library_path);
|
|
return Dart_Error("unexpected error in library path");
|
|
}
|
|
// Extract the path and the extension name from the url.
|
|
char* last_path_separator = strrchr(library_path, '/');
|
|
char* extension_name = last_path_separator + 1;
|
|
*last_path_separator = '\0'; // Terminate library_path at last separator.
|
|
|
|
void* library_handle = LoadExtensionLibrary(library_path, extension_name);
|
|
if (!library_handle) {
|
|
free(library_path);
|
|
return Dart_Error("cannot find extension library");
|
|
}
|
|
|
|
const char* strings[3] = { 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);
|
|
free(library_path);
|
|
|
|
if (fn == NULL) {
|
|
return Dart_Error("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;
|
|
}
|