JSObject*
Library::Create(JSContext* cx, HandleValue path, const JSCTypesCallbacks* callbacks)
{
RootedObject libraryObj(cx, JS_NewObject(cx, &sLibraryClass));
if (!libraryObj)
return nullptr;
// initialize the library
JS_SetReservedSlot(libraryObj, SLOT_LIBRARY, PrivateValue(nullptr));
// attach API functions
if (!JS_DefineFunctions(cx, libraryObj, sLibraryFunctions))
return nullptr;
if (!path.isString()) {
JS_ReportErrorASCII(cx, "open takes a string argument");
return nullptr;
}
PRLibSpec libSpec;
RootedFlatString pathStr(cx, JS_FlattenString(cx, path.toString()));
if (!pathStr)
return nullptr;
AutoStableStringChars pathStrChars(cx);
if (!pathStrChars.initTwoByte(cx, pathStr))
return nullptr;
#ifdef XP_WIN
// On Windows, converting to native charset may corrupt path string.
// So, we have to use Unicode path directly.
char16ptr_t pathChars = pathStrChars.twoByteChars();
libSpec.value.pathname_u = pathChars;
libSpec.type = PR_LibSpec_PathnameU;
#else
// Convert to platform native charset if the appropriate callback has been
// provided.
char* pathBytes;
if (callbacks && callbacks->unicodeToNative) {
pathBytes =
callbacks->unicodeToNative(cx, pathStrChars.twoByteChars(), pathStr->length());
if (!pathBytes)
return nullptr;
} else {
// Fallback: assume the platform native charset is UTF-8. This is true
// for Mac OS X, Android, and probably Linux.
size_t nbytes =
GetDeflatedUTF8StringLength(cx, pathStrChars.twoByteChars(), pathStr->length());
if (nbytes == (size_t) -1)
return nullptr;
pathBytes = static_cast<char*>(JS_malloc(cx, nbytes + 1));
if (!pathBytes)
return nullptr;
ASSERT_OK(DeflateStringToUTF8Buffer(cx, pathStrChars.twoByteChars(),
pathStr->length(), pathBytes, &nbytes));
pathBytes[nbytes] = 0;
}
libSpec.value.pathname = pathBytes;
libSpec.type = PR_LibSpec_Pathname;
#endif
PRLibrary* library = PR_LoadLibraryWithFlags(libSpec, PR_LD_NOW);
#ifndef XP_WIN
JS_free(cx, pathBytes);
#endif
if (!library) {
#define MAX_ERROR_LEN 1024
char error[MAX_ERROR_LEN] = "Cannot get error from NSPR.";
uint32_t errorLen = PR_GetErrorTextLength();
if (errorLen && errorLen < MAX_ERROR_LEN)
PR_GetErrorText(error);
#undef MAX_ERROR_LEN
if (JS::StringIsASCII(error)) {
JSAutoByteString pathCharsUTF8;
if (pathCharsUTF8.encodeUtf8(cx, pathStr))
JS_ReportErrorUTF8(cx, "couldn't open library %s: %s", pathCharsUTF8.ptr(), error);
} else {
JSAutoByteString pathCharsLatin1;
if (pathCharsLatin1.encodeLatin1(cx, pathStr))
JS_ReportErrorLatin1(cx, "couldn't open library %s: %s", pathCharsLatin1.ptr(), error);
}
return nullptr;
}
// stash the library
JS_SetReservedSlot(libraryObj, SLOT_LIBRARY, PrivateValue(library));
return libraryObj;
}
JSObject*
Library::Create(JSContext* cx, jsval path, JSCTypesCallbacks* callbacks)
{
JSObject* libraryObj = JS_NewObject(cx, &sLibraryClass, NULL, NULL);
if (!libraryObj)
return NULL;
js::AutoObjectRooter root(cx, libraryObj);
// initialize the library
if (!JS_SetReservedSlot(cx, libraryObj, SLOT_LIBRARY, PRIVATE_TO_JSVAL(NULL)))
return NULL;
// attach API functions
if (!JS_DefineFunctions(cx, libraryObj, sLibraryFunctions))
return NULL;
if (!JSVAL_IS_STRING(path)) {
JS_ReportError(cx, "open takes a string argument");
return NULL;
}
PRLibSpec libSpec;
JSFlatString* pathStr = JS_FlattenString(cx, JSVAL_TO_STRING(path));
if (!pathStr)
return NULL;
#ifdef XP_WIN
// On Windows, converting to native charset may corrupt path string.
// So, we have to use Unicode path directly.
const PRUnichar* pathChars = JS_GetFlatStringChars(pathStr);
if (!pathChars)
return NULL;
libSpec.value.pathname_u = pathChars;
libSpec.type = PR_LibSpec_PathnameU;
#else
// Convert to platform native charset if the appropriate callback has been
// provided.
char* pathBytes;
if (callbacks && callbacks->unicodeToNative) {
pathBytes =
callbacks->unicodeToNative(cx, pathStr->chars(), pathStr->length());
if (!pathBytes)
return NULL;
} else {
// Fallback: assume the platform native charset is UTF-8. This is true
// for Mac OS X, Android, and probably Linux.
size_t nbytes =
GetDeflatedUTF8StringLength(cx, pathStr->chars(), pathStr->length());
if (nbytes == (size_t) -1)
return NULL;
pathBytes = static_cast<char*>(JS_malloc(cx, nbytes + 1));
if (!pathBytes)
return NULL;
ASSERT_OK(DeflateStringToUTF8Buffer(cx, pathStr->chars(),
pathStr->length(), pathBytes, &nbytes));
pathBytes[nbytes] = 0;
}
libSpec.value.pathname = pathBytes;
libSpec.type = PR_LibSpec_Pathname;
#endif
PRLibrary* library = PR_LoadLibraryWithFlags(libSpec, 0);
#ifndef XP_WIN
JS_free(cx, pathBytes);
#endif
if (!library) {
JS_ReportError(cx, "couldn't open library");
return NULL;
}
// stash the library
if (!JS_SetReservedSlot(cx, libraryObj, SLOT_LIBRARY,
PRIVATE_TO_JSVAL(library)))
return NULL;
return libraryObj;
}
