mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
411 lines
11 KiB
C++
411 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
* vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
|
|
* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Mozilla Corporation
|
|
* Portions created by the Initial Developer are Copyright (C) 2008
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Shawn Wilsher <me@shawnwilsher.com> (Original Author)
|
|
* Drew Willcoxon <adw@mozilla.com>
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#ifndef mozilla_storage_Variant_h__
|
|
#define mozilla_storage_Variant_h__
|
|
|
|
#include <utility>
|
|
|
|
#include "nsIVariant.h"
|
|
#include "nsString.h"
|
|
#include "nsTArray.h"
|
|
|
|
/**
|
|
* This class is used by the storage module whenever an nsIVariant needs to be
|
|
* returned. We provide traits for the basic sqlite types to make use easier.
|
|
* The following types map to the indicated sqlite type:
|
|
* PRInt64 -> INTEGER (use IntegerVariant)
|
|
* double -> FLOAT (use FloatVariant)
|
|
* nsString -> TEXT (use TextVariant)
|
|
* nsCString -> TEXT (use UTF8TextVariant)
|
|
* PRUint8[] -> BLOB (use BlobVariant)
|
|
* nsnull -> NULL (use NullVariant)
|
|
*/
|
|
|
|
namespace mozilla {
|
|
namespace storage {
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//// Base Class
|
|
|
|
class Variant_base : public nsIVariant
|
|
{
|
|
public:
|
|
NS_DECL_ISUPPORTS
|
|
NS_DECL_NSIVARIANT
|
|
|
|
protected:
|
|
virtual ~Variant_base() { }
|
|
};
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//// Traits
|
|
|
|
/**
|
|
* Generics
|
|
*/
|
|
|
|
template <typename DataType>
|
|
struct variant_traits
|
|
{
|
|
static inline PRUint16 type() { return nsIDataType::VTYPE_EMPTY; }
|
|
};
|
|
|
|
template <typename DataType>
|
|
struct variant_storage_traits
|
|
{
|
|
typedef DataType ConstructorType;
|
|
typedef DataType StorageType;
|
|
static inline StorageType storage_conversion(ConstructorType aData) { return aData; }
|
|
};
|
|
|
|
#define NO_CONVERSION return NS_ERROR_CANNOT_CONVERT_DATA;
|
|
|
|
template <typename DataType>
|
|
struct variant_integer_traits
|
|
{
|
|
typedef typename variant_storage_traits<DataType>::StorageType StorageType;
|
|
static inline nsresult asInt32(StorageType, PRInt32 *) { NO_CONVERSION }
|
|
static inline nsresult asInt64(StorageType, PRInt64 *) { NO_CONVERSION }
|
|
};
|
|
|
|
template <typename DataType>
|
|
struct variant_float_traits
|
|
{
|
|
typedef typename variant_storage_traits<DataType>::StorageType StorageType;
|
|
static inline nsresult asDouble(StorageType, double *) { NO_CONVERSION }
|
|
};
|
|
|
|
template <typename DataType>
|
|
struct variant_text_traits
|
|
{
|
|
typedef typename variant_storage_traits<DataType>::StorageType StorageType;
|
|
static inline nsresult asUTF8String(StorageType, nsACString &) { NO_CONVERSION }
|
|
static inline nsresult asString(StorageType, nsAString &) { NO_CONVERSION }
|
|
};
|
|
|
|
template <typename DataType>
|
|
struct variant_blob_traits
|
|
{
|
|
typedef typename variant_storage_traits<DataType>::StorageType StorageType;
|
|
static inline nsresult asArray(StorageType, PRUint16 *, PRUint32 *, void **)
|
|
{ NO_CONVERSION }
|
|
};
|
|
|
|
#undef NO_CONVERSION
|
|
|
|
/**
|
|
* INTEGER types
|
|
*/
|
|
|
|
template < >
|
|
struct variant_traits<PRInt64>
|
|
{
|
|
static inline PRUint16 type() { return nsIDataType::VTYPE_INT64; }
|
|
};
|
|
template < >
|
|
struct variant_integer_traits<PRInt64>
|
|
{
|
|
static inline nsresult asInt32(PRInt64 aValue,
|
|
PRInt32 *_result)
|
|
{
|
|
if (aValue > PR_INT32_MAX || aValue < PR_INT32_MIN)
|
|
return NS_ERROR_CANNOT_CONVERT_DATA;
|
|
|
|
*_result = static_cast<PRInt32>(aValue);
|
|
return NS_OK;
|
|
}
|
|
static inline nsresult asInt64(PRInt64 aValue,
|
|
PRInt64 *_result)
|
|
{
|
|
*_result = aValue;
|
|
return NS_OK;
|
|
}
|
|
};
|
|
// xpcvariant just calls get double for integers...
|
|
template < >
|
|
struct variant_float_traits<PRInt64>
|
|
{
|
|
static inline nsresult asDouble(PRInt64 aValue,
|
|
double *_result)
|
|
{
|
|
*_result = double(aValue);
|
|
return NS_OK;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* FLOAT types
|
|
*/
|
|
|
|
template < >
|
|
struct variant_traits<double>
|
|
{
|
|
static inline PRUint16 type() { return nsIDataType::VTYPE_DOUBLE; }
|
|
};
|
|
template < >
|
|
struct variant_float_traits<double>
|
|
{
|
|
static inline nsresult asDouble(double aValue,
|
|
double *_result)
|
|
{
|
|
*_result = aValue;
|
|
return NS_OK;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* TEXT types
|
|
*/
|
|
|
|
template < >
|
|
struct variant_traits<nsString>
|
|
{
|
|
static inline PRUint16 type() { return nsIDataType::VTYPE_ASTRING; }
|
|
};
|
|
template < >
|
|
struct variant_storage_traits<nsString>
|
|
{
|
|
typedef const nsAString & ConstructorType;
|
|
typedef nsString StorageType;
|
|
static inline StorageType storage_conversion(ConstructorType aText)
|
|
{
|
|
return StorageType(aText);
|
|
}
|
|
};
|
|
template < >
|
|
struct variant_text_traits<nsString>
|
|
{
|
|
static inline nsresult asUTF8String(const nsString &aValue,
|
|
nsACString &_result)
|
|
{
|
|
CopyUTF16toUTF8(aValue, _result);
|
|
return NS_OK;
|
|
}
|
|
static inline nsresult asString(const nsString &aValue,
|
|
nsAString &_result)
|
|
{
|
|
_result = aValue;
|
|
return NS_OK;
|
|
}
|
|
};
|
|
|
|
template < >
|
|
struct variant_traits<nsCString>
|
|
{
|
|
static inline PRUint16 type() { return nsIDataType::VTYPE_UTF8STRING; }
|
|
};
|
|
template < >
|
|
struct variant_storage_traits<nsCString>
|
|
{
|
|
typedef const nsACString & ConstructorType;
|
|
typedef nsCString StorageType;
|
|
static inline StorageType storage_conversion(ConstructorType aText)
|
|
{
|
|
return StorageType(aText);
|
|
}
|
|
};
|
|
template < >
|
|
struct variant_text_traits<nsCString>
|
|
{
|
|
static inline nsresult asUTF8String(const nsCString &aValue,
|
|
nsACString &_result)
|
|
{
|
|
_result = aValue;
|
|
return NS_OK;
|
|
}
|
|
static inline nsresult asString(const nsCString &aValue,
|
|
nsAString &_result)
|
|
{
|
|
CopyUTF8toUTF16(aValue, _result);
|
|
return NS_OK;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* BLOB types
|
|
*/
|
|
|
|
template < >
|
|
struct variant_traits<PRUint8[]>
|
|
{
|
|
static inline PRUint16 type() { return nsIDataType::VTYPE_ARRAY; }
|
|
};
|
|
template < >
|
|
struct variant_storage_traits<PRUint8[]>
|
|
{
|
|
typedef std::pair<const void *, int> ConstructorType;
|
|
typedef nsTArray<PRUint8> StorageType;
|
|
static inline StorageType storage_conversion(ConstructorType aBlob)
|
|
{
|
|
nsTArray<PRUint8> data(aBlob.second);
|
|
(void)data.AppendElements(static_cast<const PRUint8 *>(aBlob.first),
|
|
aBlob.second);
|
|
return data;
|
|
}
|
|
};
|
|
template < >
|
|
struct variant_blob_traits<PRUint8[]>
|
|
{
|
|
static inline nsresult asArray(nsTArray<PRUint8> &aData,
|
|
PRUint16 *_type,
|
|
PRUint32 *_size,
|
|
void **_result)
|
|
{
|
|
// For empty blobs, we return nsnull.
|
|
if (aData.Length() == 0) {
|
|
*_result = nsnull;
|
|
*_type = nsIDataType::VTYPE_UINT8;
|
|
*_size = 0;
|
|
return NS_OK;
|
|
}
|
|
|
|
// Otherwise, we copy the array.
|
|
*_result = nsMemory::Clone(aData.Elements(), aData.Length() * sizeof(PRUint8));
|
|
NS_ENSURE_TRUE(*_result, NS_ERROR_OUT_OF_MEMORY);
|
|
|
|
// Set type and size
|
|
*_type = nsIDataType::VTYPE_UINT8;
|
|
*_size = aData.Length();
|
|
return NS_OK;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* NULL type
|
|
*/
|
|
|
|
class NullVariant : public Variant_base
|
|
{
|
|
public:
|
|
NS_IMETHOD GetDataType(PRUint16 *_type)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(_type);
|
|
*_type = nsIDataType::VTYPE_EMPTY;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHOD GetAsAUTF8String(nsACString &_str)
|
|
{
|
|
// Return a void string.
|
|
_str.Truncate(0);
|
|
_str.SetIsVoid(PR_TRUE);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHOD GetAsAString(nsAString &_str)
|
|
{
|
|
// Return a void string.
|
|
_str.Truncate(0);
|
|
_str.SetIsVoid(PR_TRUE);
|
|
return NS_OK;
|
|
}
|
|
};
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//// Template Implementation
|
|
|
|
template <typename DataType>
|
|
class Variant : public Variant_base
|
|
{
|
|
public:
|
|
Variant(typename variant_storage_traits<DataType>::ConstructorType aData)
|
|
: mData(variant_storage_traits<DataType>::storage_conversion(aData))
|
|
{
|
|
}
|
|
|
|
NS_IMETHOD GetDataType(PRUint16 *_type)
|
|
{
|
|
*_type = variant_traits<DataType>::type();
|
|
return NS_OK;
|
|
}
|
|
NS_IMETHOD GetAsInt32(PRInt32 *_integer)
|
|
{
|
|
return variant_integer_traits<DataType>::asInt32(mData, _integer);
|
|
}
|
|
|
|
NS_IMETHOD GetAsInt64(PRInt64 *_integer)
|
|
{
|
|
return variant_integer_traits<DataType>::asInt64(mData, _integer);
|
|
}
|
|
|
|
NS_IMETHOD GetAsDouble(double *_double)
|
|
{
|
|
return variant_float_traits<DataType>::asDouble(mData, _double);
|
|
}
|
|
|
|
NS_IMETHOD GetAsAUTF8String(nsACString &_str)
|
|
{
|
|
return variant_text_traits<DataType>::asUTF8String(mData, _str);
|
|
}
|
|
|
|
NS_IMETHOD GetAsAString(nsAString &_str)
|
|
{
|
|
return variant_text_traits<DataType>::asString(mData, _str);
|
|
}
|
|
|
|
NS_IMETHOD GetAsArray(PRUint16 *_type,
|
|
nsIID *,
|
|
PRUint32 *_size,
|
|
void **_data)
|
|
{
|
|
return variant_blob_traits<DataType>::asArray(mData, _type, _size, _data);
|
|
}
|
|
|
|
private:
|
|
typename variant_storage_traits<DataType>::StorageType mData;
|
|
};
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//// Handy typedefs! Use these for the right mapping.
|
|
|
|
typedef Variant<PRInt64> IntegerVariant;
|
|
typedef Variant<double> FloatVariant;
|
|
typedef Variant<nsString> TextVariant;
|
|
typedef Variant<nsCString> UTF8TextVariant;
|
|
typedef Variant<PRUint8[]> BlobVariant;
|
|
|
|
} // namespace storage
|
|
} // namespace mozilla
|
|
|
|
#include "Variant_inl.h"
|
|
|
|
#endif // mozilla_storage_Variant_h__
|