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-rw-r--r--storage/variantToSQLiteT_impl.h114
1 files changed, 114 insertions, 0 deletions
diff --git a/storage/variantToSQLiteT_impl.h b/storage/variantToSQLiteT_impl.h
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Note: we are already in the namepace mozilla::storage
+
+// Note 2: whoever #includes this file must provide implementations of
+// sqlite3_T_* prior.
+
+////////////////////////////////////////////////////////////////////////////////
+//// variantToSQLiteT Implementation
+
+template <typename T>
+int variantToSQLiteT(T aObj, nsIVariant* aValue) {
+ // Allow to return nullptr not wrapped to nsIVariant for speed.
+ if (!aValue) return sqlite3_T_null(aObj);
+
+ uint16_t valueType = aValue->GetDataType();
+ switch (valueType) {
+ case nsIDataType::VTYPE_INT8:
+ case nsIDataType::VTYPE_INT16:
+ case nsIDataType::VTYPE_INT32:
+ case nsIDataType::VTYPE_UINT8:
+ case nsIDataType::VTYPE_UINT16: {
+ int32_t value;
+ nsresult rv = aValue->GetAsInt32(&value);
+ NS_ENSURE_SUCCESS(rv, SQLITE_MISMATCH);
+ return sqlite3_T_int(aObj, value);
+ }
+ case nsIDataType::VTYPE_UINT32: // Try to preserve full range
+ case nsIDataType::VTYPE_INT64:
+ // Data loss possible, but there is no unsigned types in SQLite
+ case nsIDataType::VTYPE_UINT64: {
+ int64_t value;
+ nsresult rv = aValue->GetAsInt64(&value);
+ NS_ENSURE_SUCCESS(rv, SQLITE_MISMATCH);
+ return sqlite3_T_int64(aObj, value);
+ }
+ case nsIDataType::VTYPE_FLOAT:
+ case nsIDataType::VTYPE_DOUBLE: {
+ double value;
+ nsresult rv = aValue->GetAsDouble(&value);
+ NS_ENSURE_SUCCESS(rv, SQLITE_MISMATCH);
+ return sqlite3_T_double(aObj, value);
+ }
+ case nsIDataType::VTYPE_BOOL: {
+ bool value;
+ nsresult rv = aValue->GetAsBool(&value);
+ NS_ENSURE_SUCCESS(rv, SQLITE_MISMATCH);
+ return sqlite3_T_int(aObj, value ? 1 : 0);
+ }
+ case nsIDataType::VTYPE_CHAR:
+ case nsIDataType::VTYPE_CHAR_STR:
+ case nsIDataType::VTYPE_STRING_SIZE_IS:
+ case nsIDataType::VTYPE_UTF8STRING:
+ case nsIDataType::VTYPE_CSTRING: {
+ nsAutoCString value;
+ // GetAsAUTF8String should never perform conversion when coming from
+ // 8-bit string types, and thus can accept strings with arbitrary encoding
+ // (including UTF8 and ASCII).
+ nsresult rv = aValue->GetAsAUTF8String(value);
+ NS_ENSURE_SUCCESS(rv, SQLITE_MISMATCH);
+ return sqlite3_T_text(aObj, value);
+ }
+ case nsIDataType::VTYPE_WCHAR:
+ case nsIDataType::VTYPE_WCHAR_STR:
+ case nsIDataType::VTYPE_WSTRING_SIZE_IS:
+ case nsIDataType::VTYPE_ASTRING: {
+ nsAutoString value;
+ // GetAsAString does proper conversion to UCS2 from all string-like types.
+ // It can be used universally without problems (unless someone implements
+ // their own variant, but that's their problem).
+ nsresult rv = aValue->GetAsAString(value);
+ NS_ENSURE_SUCCESS(rv, SQLITE_MISMATCH);
+ return sqlite3_T_text16(aObj, value);
+ }
+ case nsIDataType::VTYPE_VOID:
+ case nsIDataType::VTYPE_EMPTY:
+ case nsIDataType::VTYPE_EMPTY_ARRAY:
+ return sqlite3_T_null(aObj);
+ case nsIDataType::VTYPE_ARRAY: {
+ uint16_t arrayType;
+ nsIID iid;
+ uint32_t count;
+ void* data;
+ nsresult rv = aValue->GetAsArray(&arrayType, &iid, &count, &data);
+ NS_ENSURE_SUCCESS(rv, SQLITE_MISMATCH);
+
+ // Check to make sure it's a supported type.
+ NS_ASSERTION(arrayType == nsIDataType::VTYPE_UINT8,
+ "Invalid type passed! You may leak!");
+ if (arrayType != nsIDataType::VTYPE_UINT8) {
+ // Technically this could leak with certain data types, but somebody was
+ // being stupid passing us this anyway.
+ free(data);
+ return SQLITE_MISMATCH;
+ }
+
+ // Finally do our thing. The function should free the array accordingly!
+ int rc = sqlite3_T_blob(aObj, data, count);
+ return rc;
+ }
+ // Maybe, it'll be possible to convert these
+ // in future too.
+ case nsIDataType::VTYPE_ID:
+ case nsIDataType::VTYPE_INTERFACE:
+ case nsIDataType::VTYPE_INTERFACE_IS:
+ default:
+ return SQLITE_MISMATCH;
+ }
+ return SQLITE_OK;
+}