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ole32: Make get_priv_data return target device ptrs (rather than offsets) and add a couple of helper functions to simplify this process.

This commit is contained in:
Huw Davies 2009-04-16 15:27:24 +01:00 committed by Alexandre Julliard
parent 2e6ac3a571
commit bdca138d5a
1 changed files with 46 additions and 5 deletions
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51
dlls/ole32/clipboard.c
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@ -104,6 +104,34 @@ typedef struct
/* then follows any DVTARGETDEVICE structures referenced in the FORMATETCs */
} ole_priv_data;
/*****************************************************************************
* td_offs_to_ptr
*
* Returns a ptr to a target device at a given offset from the
* start of the ole_priv_data.
*
* Used when unpacking ole private data from the clipboard.
*/
static inline DVTARGETDEVICE *td_offs_to_ptr(ole_priv_data *data, DWORD_PTR off)
{
if(off == 0) return NULL;
return (DVTARGETDEVICE*)((char*)data + off);
}
/*****************************************************************************
* td_get_offs
*
* Get the offset from the start of the ole_priv_data of the idx'th
* target device.
*
* Used when packing ole private data to the clipboard.
*/
static inline DWORD_PTR td_get_offs(ole_priv_data *data, DWORD idx)
{
if(data->entries[idx].fmtetc.ptd == NULL) return 0;
return (char*)data->entries[idx].fmtetc.ptd - (char*)data;
}
/*****************************************************************************
* create_empty_priv_data
*
@ -313,7 +341,7 @@ static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_Next
rgelt[i] = This->data->entries[This->pos++].fmtetc;
if(rgelt[i].ptd)
{
DVTARGETDEVICE *target = (DVTARGETDEVICE *)((char *)This->data + (DWORD)rgelt[i].ptd);
DVTARGETDEVICE *target = rgelt[i].ptd;
rgelt[i].ptd = CoTaskMemAlloc(target->tdSize);
if(!rgelt[i].ptd) return E_OUTOFMEMORY;
memcpy(rgelt[i].ptd, target, target->tdSize);
@ -378,6 +406,7 @@ static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_Clone
{
enum_fmtetc *This = impl_from_IEnumFORMATETC(iface);
ole_priv_data *new_data;
DWORD i;
TRACE("(%p)->(%p)\n", This, obj);
@ -386,6 +415,12 @@ static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_Clone
new_data = HeapAlloc(GetProcessHeap(), 0, This->data->size);
if(!new_data) return E_OUTOFMEMORY;
memcpy(new_data, This->data, This->data->size);
/* Fixup any target device ptrs */
for(i = 0; i < This->data->count; i++)
new_data->entries[i].fmtetc.ptd =
td_offs_to_ptr(new_data, td_get_offs(This->data, i));
return enum_fmtetc_construct(new_data, This->pos, obj);
}
@ -922,6 +957,8 @@ static HRESULT get_priv_data(ole_priv_data **data)
ole_priv_data *src = GlobalLock(handle);
if(src)
{
DWORD i;
/* FIXME: sanity check on size */
*data = HeapAlloc(GetProcessHeap(), 0, src->size);
if(!*data)
@ -931,6 +968,11 @@ static HRESULT get_priv_data(ole_priv_data **data)
}
memcpy(*data, src, src->size);
GlobalUnlock(handle);
/* Fixup any target device offsets to ptrs */
for(i = 0; i < (*data)->count; i++)
(*data)->entries[i].fmtetc.ptd =
td_offs_to_ptr(*data, (DWORD_PTR)(*data)->entries[i].fmtetc.ptd);
}
}
@ -1343,7 +1385,7 @@ static HRESULT set_clipboard_formats(ole_clipbrd *clipbrd, IDataObject *data)
FORMATETC fmt;
IEnumFORMATETC *enum_fmt;
HGLOBAL priv_data_handle;
DWORD target_offset;
DWORD_PTR target_offset;
ole_priv_data *priv_data;
DWORD count = 0, needed = sizeof(*priv_data), idx;
@ -1410,9 +1452,8 @@ static HRESULT set_clipboard_formats(ole_clipbrd *clipbrd, IDataObject *data)
clipbrd->cached_enum = HeapAlloc(GetProcessHeap(), 0, needed);
memcpy(clipbrd->cached_enum, priv_data, needed);
for(idx = 0; idx < clipbrd->cached_enum->count; idx++)
if(clipbrd->cached_enum->entries[idx].fmtetc.ptd)
clipbrd->cached_enum->entries[idx].fmtetc.ptd =
(DVTARGETDEVICE *)((char*)clipbrd->cached_enum + (DWORD)clipbrd->cached_enum->entries[idx].fmtetc.ptd);
clipbrd->cached_enum->entries[idx].fmtetc.ptd =
td_offs_to_ptr(clipbrd->cached_enum, (DWORD_PTR)clipbrd->cached_enum->entries[idx].fmtetc.ptd);
GlobalUnlock(priv_data_handle);
SetClipboardData(ole_priv_data_clipboard_format, priv_data_handle);