?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
oledb32: Implement GetConversionSize DBTYPE_VARIANT->DBTYPE_WSTR.
[wine/multimedia.git] / dlls / oledb32 / convert.c
blob65a2bf67c1e843dd16d9b6a4494ef568b2976f61
1 /* OLE DB Conversion library
2 *
3 * Copyright 2009 Huw Davies
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
18 */
19
20 #include <stdarg.h>
21
22 #define COBJMACROS
23 #define NONAMELESSUNION
24 #define NONAMELESSSTRUCT
25
26 #include "windef.h"
27 #include "winbase.h"
28 #include "winnls.h"
29 #include "ole2.h"
30 #include "msdadc.h"
31 #include "oledberr.h"
32
33 #include "oledb_private.h"
34
35 #include "wine/debug.h"
36
37 WINE_DEFAULT_DEBUG_CHANNEL(oledb);
38
39 typedef struct
40 {
41 IDataConvert IDataConvert_iface;
42 IDCInfo IDCInfo_iface;
43
44 LONG ref;
45
46 UINT version; /* Set by IDCInfo_SetInfo */
47 } convert;
48
49 static inline convert *impl_from_IDataConvert(IDataConvert *iface)
50 {
51 return CONTAINING_RECORD(iface, convert, IDataConvert_iface);
52 }
53
54 static inline convert *impl_from_IDCInfo(IDCInfo *iface)
55 {
56 return CONTAINING_RECORD(iface, convert, IDCInfo_iface);
57 }
58
59 static HRESULT WINAPI convert_QueryInterface(IDataConvert* iface,
60 REFIID riid,
61 void **obj)
62 {
63 convert *This = impl_from_IDataConvert(iface);
64 TRACE("(%p)->(%s, %p)\n", This, debugstr_guid(riid), obj);
65
66 *obj = NULL;
67
68 if(IsEqualIID(riid, &IID_IUnknown) ||
69 IsEqualIID(riid, &IID_IDataConvert))
70 {
71 *obj = iface;
72 }
73 else if(IsEqualIID(riid, &IID_IDCInfo))
74 {
75 *obj = &This->IDCInfo_iface;
76 }
77 else
78 {
79 FIXME("interface %s not implemented\n", debugstr_guid(riid));
80 return E_NOINTERFACE;
81 }
82
83 IDataConvert_AddRef(iface);
84 return S_OK;
85 }
86
87
88 static ULONG WINAPI convert_AddRef(IDataConvert* iface)
89 {
90 convert *This = impl_from_IDataConvert(iface);
91 TRACE("(%p)\n", This);
92
93 return InterlockedIncrement(&This->ref);
94 }
95
96
97 static ULONG WINAPI convert_Release(IDataConvert* iface)
98 {
99 convert *This = impl_from_IDataConvert(iface);
100 LONG ref;
101
102 TRACE("(%p)\n", This);
103
104 ref = InterlockedDecrement(&This->ref);
105 if(ref == 0)
106 {
107 HeapFree(GetProcessHeap(), 0, This);
108 }
109
110 return ref;
111 }
112
113 static int get_length(DBTYPE type)
114 {
115 switch(type)
116 {
117 case DBTYPE_I1:
118 case DBTYPE_UI1:
119 return 1;
120 case DBTYPE_I2:
121 case DBTYPE_UI2:
122 return 2;
123 case DBTYPE_BOOL:
124 return sizeof(VARIANT_BOOL);
125 case DBTYPE_I4:
126 case DBTYPE_UI4:
127 case DBTYPE_R4:
128 return 4;
129 case DBTYPE_I8:
130 case DBTYPE_UI8:
131 case DBTYPE_R8:
132 case DBTYPE_DATE:
133 return 8;
134 case DBTYPE_DBTIMESTAMP:
135 return sizeof(DBTIMESTAMP);
136 case DBTYPE_CY:
137 return sizeof(CY);
138 case DBTYPE_BSTR:
139 return sizeof(BSTR);
140 case DBTYPE_FILETIME:
141 return sizeof(FILETIME);
142 case DBTYPE_GUID:
143 return sizeof(GUID);
144 case DBTYPE_WSTR:
145 case DBTYPE_STR:
146 case DBTYPE_BYREF | DBTYPE_WSTR:
147 return 0;
148 case DBTYPE_VARIANT:
149 return sizeof(VARIANT);
150 default:
151 FIXME("Unhandled type %04x\n", type);
152 return 0;
153 }
154 }
155
156 static HRESULT WINAPI convert_DataConvert(IDataConvert* iface,
157 DBTYPE src_type, DBTYPE dst_type,
158 DBLENGTH src_len, DBLENGTH *dst_len,
159 void *src, void *dst,
160 DBLENGTH dst_max_len,
161 DBSTATUS src_status, DBSTATUS *dst_status,
162 BYTE precision, BYTE scale,
163 DBDATACONVERT flags)
164 {
165 convert *This = impl_from_IDataConvert(iface);
166 DBLENGTH dst_len_loc;
167 DBSTATUS dst_status_loc;
168 VARIANT tmp;
169 HRESULT hr;
170
171 TRACE("(%p)->(%d, %d, %ld, %p, %p, %p, %ld, %d, %p, %d, %d, %x)\n", This,
172 src_type, dst_type, src_len, dst_len, src, dst, dst_max_len,
173 src_status, dst_status, precision, scale, flags);
174
175 if (!dst_len) dst_len = &dst_len_loc;
176 if (!dst_status) dst_status = &dst_status_loc;
177
178 *dst_status = DBSTATUS_E_BADACCESSOR;
179
180 if(IDataConvert_CanConvert(iface, src_type, dst_type) != S_OK)
181 {
182 return DB_E_UNSUPPORTEDCONVERSION;
183 }
184
185 if(src_type == DBTYPE_STR)
186 {
187 BSTR b;
188 DWORD len;
189
190 if(flags & DBDATACONVERT_LENGTHFROMNTS)
191 len = MultiByteToWideChar(CP_ACP, 0, src, -1, NULL, 0) - 1;
192 else
193 len = MultiByteToWideChar(CP_ACP, 0, src, src_len, NULL, 0);
194 b = SysAllocStringLen(NULL, len);
195 if(!b) return E_OUTOFMEMORY;
196 if(flags & DBDATACONVERT_LENGTHFROMNTS)
197 MultiByteToWideChar(CP_ACP, 0, src, -1, b, len + 1);
198 else
199 MultiByteToWideChar(CP_ACP, 0, src, src_len, b, len);
200
201 hr = IDataConvert_DataConvert(iface, DBTYPE_BSTR, dst_type, 0, dst_len,
202 &b, dst, dst_max_len, src_status, dst_status,
203 precision, scale, flags);
204
205 SysFreeString(b);
206 return hr;
207 }
208
209 if(src_type == DBTYPE_WSTR)
210 {
211 BSTR b;
212
213 if(flags & DBDATACONVERT_LENGTHFROMNTS)
214 b = SysAllocString(src);
215 else
216 b = SysAllocStringLen(src, src_len / 2);
217 if(!b) return E_OUTOFMEMORY;
218 hr = IDataConvert_DataConvert(iface, DBTYPE_BSTR, dst_type, 0, dst_len,
219 &b, dst, dst_max_len, src_status, dst_status,
220 precision, scale, flags);
221 SysFreeString(b);
222 return hr;
223 }
224
225 switch(dst_type)
226 {
227 case DBTYPE_I2:
228 {
229 signed short *d = dst;
230 switch(src_type)
231 {
232 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
233 case DBTYPE_I2: *d = *(signed short*)src; hr = S_OK; break;
234 case DBTYPE_I4: hr = VarI2FromI4(*(signed int*)src, d); break;
235 case DBTYPE_R4: hr = VarI2FromR4(*(FLOAT*)src, d); break;
236 case DBTYPE_R8: hr = VarI2FromR8(*(double*)src, d); break;
237 case DBTYPE_CY: hr = VarI2FromCy(*(CY*)src, d); break;
238 case DBTYPE_DATE: hr = VarI2FromDate(*(DATE*)src, d); break;
239 case DBTYPE_BSTR: hr = VarI2FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
240 case DBTYPE_BOOL: hr = VarI2FromBool(*(VARIANT_BOOL*)src, d); break;
241 case DBTYPE_DECIMAL: hr = VarI2FromDec((DECIMAL*)src, d); break;
242 case DBTYPE_I1: hr = VarI2FromI1(*(signed char*)src, d); break;
243 case DBTYPE_UI1: hr = VarI2FromUI1(*(BYTE*)src, d); break;
244 case DBTYPE_UI2: hr = VarI2FromUI2(*(WORD*)src, d); break;
245 case DBTYPE_UI4: hr = VarI2FromUI4(*(DWORD*)src, d); break;
246 case DBTYPE_I8: hr = VarI2FromI8(*(LONGLONG*)src, d); break;
247 case DBTYPE_UI8: hr = VarI2FromUI8(*(ULONGLONG*)src, d); break;
248 case DBTYPE_VARIANT:
249 VariantInit(&tmp);
250 if ((hr = VariantChangeType(&tmp, (VARIANT*)src, 0, VT_I2)) == S_OK)
251 *d = V_I2(&tmp);
252 break;
253 default: FIXME("Unimplemented conversion %04x -> I2\n", src_type); return E_NOTIMPL;
254 }
255 break;
256 }
257
258 case DBTYPE_I4:
259 {
260 signed int *d = dst;
261 switch(src_type)
262 {
263 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
264 case DBTYPE_I2: hr = VarI4FromI2(*(signed short*)src, d); break;
265 case DBTYPE_I4: *d = *(signed int*)src; hr = S_OK; break;
266 case DBTYPE_R4: hr = VarI4FromR4(*(FLOAT*)src, d); break;
267 case DBTYPE_R8: hr = VarI4FromR8(*(double*)src, d); break;
268 case DBTYPE_CY: hr = VarI4FromCy(*(CY*)src, d); break;
269 case DBTYPE_DATE: hr = VarI4FromDate(*(DATE*)src, d); break;
270 case DBTYPE_BSTR: hr = VarI4FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
271 case DBTYPE_BOOL: hr = VarI4FromBool(*(VARIANT_BOOL*)src, d); break;
272 case DBTYPE_DECIMAL: hr = VarI4FromDec((DECIMAL*)src, d); break;
273 case DBTYPE_I1: hr = VarI4FromI1(*(signed char*)src, d); break;
274 case DBTYPE_UI1: hr = VarI4FromUI1(*(BYTE*)src, d); break;
275 case DBTYPE_UI2: hr = VarI4FromUI2(*(WORD*)src, d); break;
276 case DBTYPE_UI4: hr = VarI4FromUI4(*(DWORD*)src, d); break;
277 case DBTYPE_I8: hr = VarI4FromI8(*(LONGLONG*)src, d); break;
278 case DBTYPE_UI8: hr = VarI4FromUI8(*(ULONGLONG*)src, d); break;
279 case DBTYPE_VARIANT:
280 VariantInit(&tmp);
281 if ((hr = VariantChangeType(&tmp, (VARIANT*)src, 0, VT_I4)) == S_OK)
282 *d = V_I4(&tmp);
283 break;
284 default: FIXME("Unimplemented conversion %04x -> I4\n", src_type); return E_NOTIMPL;
285 }
286 break;
287 }
288
289 case DBTYPE_I8:
290 {
291 LONGLONG *d = dst;
292 switch(src_type)
293 {
294 case DBTYPE_BSTR: hr = VarI8FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
295 case DBTYPE_I8: *d = *(LONGLONG*)src; hr = S_OK; break;
296 default: FIXME("Unimplemented conversion %04x -> I8\n", src_type); return E_NOTIMPL;
297 }
298 break;
299 }
300
301 case DBTYPE_R4:
302 {
303 FLOAT *d = dst;
304 switch(src_type)
305 {
306 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
307 case DBTYPE_I2: hr = VarR4FromI2(*(signed short*)src, d); break;
308 case DBTYPE_I4: hr = VarR4FromI4(*(signed int*)src, d); break;
309 case DBTYPE_R4: *d = *(FLOAT*)src; hr = S_OK; break;
310 case DBTYPE_R8: hr = VarR4FromR8(*(double*)src, d); break;
311 case DBTYPE_CY: hr = VarR4FromCy(*(CY*)src, d); break;
312 case DBTYPE_DATE: hr = VarR4FromDate(*(DATE*)src, d); break;
313 case DBTYPE_BSTR: hr = VarR4FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
314 case DBTYPE_BOOL: hr = VarR4FromBool(*(VARIANT_BOOL*)src, d); break;
315 case DBTYPE_DECIMAL: hr = VarR4FromDec((DECIMAL*)src, d); break;
316 case DBTYPE_I1: hr = VarR4FromI1(*(signed char*)src, d); break;
317 case DBTYPE_UI1: hr = VarR4FromUI1(*(BYTE*)src, d); break;
318 case DBTYPE_UI2: hr = VarR4FromUI2(*(WORD*)src, d); break;
319 case DBTYPE_UI4: hr = VarR4FromUI4(*(DWORD*)src, d); break;
320 case DBTYPE_I8: hr = VarR4FromI8(*(LONGLONG*)src, d); break;
321 case DBTYPE_UI8: hr = VarR4FromUI8(*(ULONGLONG*)src, d); break;
322 default: FIXME("Unimplemented conversion %04x -> R4\n", src_type); return E_NOTIMPL;
323 }
324 break;
325 }
326 case DBTYPE_R8:
327 {
328 DOUBLE *d=dst;
329 switch (src_type)
330 {
331 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
332 case DBTYPE_I1: hr = VarR8FromI1(*(signed char*)src, d); break;
333 case DBTYPE_I2: hr = VarR8FromI2(*(signed short*)src, d); break;
334 case DBTYPE_I4: hr = VarR8FromI4(*(signed int*)src, d); break;
335 case DBTYPE_I8: hr = VarR8FromI8(*(LONGLONG*)src, d); break;
336 case DBTYPE_UI1: hr = VarR8FromUI1(*(BYTE*)src, d); break;
337 case DBTYPE_UI2: hr = VarR8FromUI2(*(WORD*)src, d); break;
338 case DBTYPE_UI4: hr = VarR8FromUI4(*(DWORD*)src, d); break;
339 case DBTYPE_UI8: hr = VarR8FromUI8(*(ULONGLONG*)src, d); break;
340 case DBTYPE_R4: hr = VarR8FromR4(*(FLOAT*)src, d); break;
341 case DBTYPE_R8: *d = *(DOUBLE*)src; hr = S_OK; break;
342 case DBTYPE_CY: hr = VarR8FromCy(*(CY*)src, d); break;
343 case DBTYPE_DATE: hr = VarR8FromDate(*(DATE*)src, d); break;
344 case DBTYPE_BSTR: hr = VarR8FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
345 case DBTYPE_BOOL: hr = VarR8FromBool(*(VARIANT_BOOL*)src, d); break;
346 case DBTYPE_DECIMAL: hr = VarR8FromDec((DECIMAL*)src, d); break;
347 default: FIXME("Unimplemented conversion %04x -> R8\n", src_type); return E_NOTIMPL;
348 }
349 break;
350 }
351 case DBTYPE_BOOL:
352 {
353 VARIANT_BOOL *d=dst;
354 switch (src_type)
355 {
356 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
357 case DBTYPE_I1: hr = VarBoolFromI1(*(signed char*)src, d); break;
358 case DBTYPE_I2: hr = VarBoolFromI2(*(signed short*)src, d); break;
359 case DBTYPE_I4: hr = VarBoolFromI4(*(signed int*)src, d); break;
360 case DBTYPE_I8: hr = VarBoolFromI8(*(LONGLONG*)src, d); break;
361 case DBTYPE_UI1: hr = VarBoolFromUI1(*(BYTE*)src, d); break;
362 case DBTYPE_UI2: hr = VarBoolFromUI2(*(WORD*)src, d); break;
363 case DBTYPE_UI4: hr = VarBoolFromUI4(*(DWORD*)src, d); break;
364 case DBTYPE_UI8: hr = VarBoolFromUI8(*(ULONGLONG*)src, d); break;
365 case DBTYPE_R4: hr = VarBoolFromR4(*(FLOAT*)src, d); break;
366 case DBTYPE_R8: hr = VarBoolFromR8(*(DOUBLE*)src, d); break;
367 case DBTYPE_CY: hr = VarBoolFromCy(*(CY*)src, d); break;
368 case DBTYPE_DATE: hr = VarBoolFromDate(*(DATE*)src, d); break;
369 case DBTYPE_BSTR: hr = VarBoolFromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
370 case DBTYPE_BOOL: *d = *(VARIANT_BOOL*)src; hr = S_OK; break;
371 case DBTYPE_DECIMAL: hr = VarBoolFromDec((DECIMAL*)src, d); break;
372 default: FIXME("Unimplemented conversion %04x -> BOOL\n", src_type); return E_NOTIMPL;
373 }
374 break;
375 }
376 case DBTYPE_DATE:
377 {
378 DATE *d=dst;
379 switch (src_type)
380 {
381 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
382 case DBTYPE_I1: hr = VarDateFromI1(*(signed char*)src, d); break;
383 case DBTYPE_I2: hr = VarDateFromI2(*(signed short*)src, d); break;
384 case DBTYPE_I4: hr = VarDateFromI4(*(signed int*)src, d); break;
385 case DBTYPE_I8: hr = VarDateFromI8(*(LONGLONG*)src, d); break;
386 case DBTYPE_UI1: hr = VarDateFromUI1(*(BYTE*)src, d); break;
387 case DBTYPE_UI2: hr = VarDateFromUI2(*(WORD*)src, d); break;
388 case DBTYPE_UI4: hr = VarDateFromUI4(*(DWORD*)src, d); break;
389 case DBTYPE_UI8: hr = VarDateFromUI8(*(ULONGLONG*)src, d); break;
390 case DBTYPE_R4: hr = VarDateFromR4(*(FLOAT*)src, d); break;
391 case DBTYPE_R8: hr = VarDateFromR8(*(DOUBLE*)src, d); break;
392 case DBTYPE_CY: hr = VarDateFromCy(*(CY*)src, d); break;
393 case DBTYPE_DATE: *d = *(DATE*)src; hr = S_OK; break;
394 case DBTYPE_BSTR: hr = VarDateFromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
395 case DBTYPE_BOOL: hr = VarDateFromBool(*(VARIANT_BOOL*)src, d); break;
396 case DBTYPE_DECIMAL: hr = VarDateFromDec((DECIMAL*)src, d); break;
397 case DBTYPE_DBTIMESTAMP:
398 {
399 SYSTEMTIME st;
400 DBTIMESTAMP *ts=(DBTIMESTAMP*)src;
401
402 st.wYear = ts->year;
403 st.wMonth = ts->month;
404 st.wDay = ts->day;
405 st.wHour = ts->hour;
406 st.wMinute = ts->minute;
407 st.wSecond = ts->second;
408 st.wMilliseconds = ts->fraction/1000000;
409 hr = (SystemTimeToVariantTime(&st, d) ? S_OK : E_FAIL);
410 break;
411 }
412 default: FIXME("Unimplemented conversion %04x -> DATE\n", src_type); return E_NOTIMPL;
413 }
414 break;
415 }
416 case DBTYPE_DBTIMESTAMP:
417 {
418 DBTIMESTAMP *d=dst;
419 switch (src_type)
420 {
421 case DBTYPE_EMPTY: memset(d, 0, sizeof(DBTIMESTAMP)); hr = S_OK; break;
422 case DBTYPE_DBTIMESTAMP: memcpy(d, src, sizeof(DBTIMESTAMP)); hr = S_OK; break;
423 case DBTYPE_DATE:
424 {
425 SYSTEMTIME st;
426 hr = (VariantTimeToSystemTime(*(double*)src, &st) ? S_OK : E_FAIL);
427 d->year = st.wYear;
428 d->month = st.wMonth;
429 d->day = st.wDay;
430 d->hour = st.wHour;
431 d->minute = st.wMinute;
432 d->second = st.wSecond;
433 d->fraction = st.wMilliseconds * 1000000;
434 break;
435 }
436 default: FIXME("Unimplemented conversion %04x -> DBTIMESTAMP\n", src_type); return E_NOTIMPL;
437 }
438 break;
439 }
440
441 case DBTYPE_CY:
442 {
443 CY *d = dst;
444 switch(src_type)
445 {
446 case DBTYPE_EMPTY: d->int64 = 0; hr = S_OK; break;
447 case DBTYPE_I2: hr = VarCyFromI2(*(signed short*)src, d); break;
448 case DBTYPE_I4: hr = VarCyFromI4(*(signed int*)src, d); break;
449 case DBTYPE_R4: hr = VarCyFromR4(*(FLOAT*)src, d); break;
450 case DBTYPE_R8: hr = VarCyFromR8(*(double*)src, d); break;
451 case DBTYPE_CY: *d = *(CY*)src; hr = S_OK; break;
452 case DBTYPE_DATE: hr = VarCyFromDate(*(DATE*)src, d); break;
453 case DBTYPE_BSTR: hr = VarCyFromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
454 case DBTYPE_BOOL: hr = VarCyFromBool(*(VARIANT_BOOL*)src, d); break;
455 case DBTYPE_DECIMAL: hr = VarCyFromDec((DECIMAL*)src, d); break;
456 case DBTYPE_I1: hr = VarCyFromI1(*(signed char*)src, d); break;
457 case DBTYPE_UI1: hr = VarCyFromUI1(*(BYTE*)src, d); break;
458 case DBTYPE_UI2: hr = VarCyFromUI2(*(WORD*)src, d); break;
459 case DBTYPE_UI4: hr = VarCyFromUI4(*(DWORD*)src, d); break;
460 case DBTYPE_I8: hr = VarCyFromI8(*(LONGLONG*)src, d); break;
461 case DBTYPE_UI8: hr = VarCyFromUI8(*(ULONGLONG*)src, d); break;
462 default: FIXME("Unimplemented conversion %04x -> CY\n", src_type); return E_NOTIMPL;
463 }
464 break;
465 }
466
467 case DBTYPE_BSTR:
468 {
469 BSTR *d = dst;
470 switch(src_type)
471 {
472 case DBTYPE_EMPTY: *d = SysAllocStringLen(NULL, 0); hr = *d ? S_OK : E_OUTOFMEMORY; break;
473 case DBTYPE_I2: hr = VarBstrFromI2(*(signed short*)src, LOCALE_USER_DEFAULT, 0, d); break;
474 case DBTYPE_I4: hr = VarBstrFromI4(*(signed int*)src, LOCALE_USER_DEFAULT, 0, d); break;
475 case DBTYPE_R4: hr = VarBstrFromR4(*(FLOAT*)src, LOCALE_USER_DEFAULT, 0, d); break;
476 case DBTYPE_R8: hr = VarBstrFromR8(*(double*)src, LOCALE_USER_DEFAULT, 0, d); break;
477 case DBTYPE_CY: hr = VarBstrFromCy(*(CY*)src, LOCALE_USER_DEFAULT, 0, d); break;
478 case DBTYPE_DATE: hr = VarBstrFromDate(*(DATE*)src, LOCALE_USER_DEFAULT, 0, d); break;
479 case DBTYPE_BSTR: *d = SysAllocStringLen(*(BSTR*)src, SysStringLen(*(BSTR*)src)); hr = *d ? S_OK : E_OUTOFMEMORY; break;
480 case DBTYPE_BOOL: hr = VarBstrFromBool(*(VARIANT_BOOL*)src, LOCALE_USER_DEFAULT, 0, d); break;
481 case DBTYPE_DECIMAL: hr = VarBstrFromDec((DECIMAL*)src, LOCALE_USER_DEFAULT, 0, d); break;
482 case DBTYPE_I1: hr = VarBstrFromI1(*(signed char*)src, LOCALE_USER_DEFAULT, 0, d); break;
483 case DBTYPE_UI1: hr = VarBstrFromUI1(*(BYTE*)src, LOCALE_USER_DEFAULT, 0, d); break;
484 case DBTYPE_UI2: hr = VarBstrFromUI2(*(WORD*)src, LOCALE_USER_DEFAULT, 0, d); break;
485 case DBTYPE_UI4: hr = VarBstrFromUI4(*(DWORD*)src, LOCALE_USER_DEFAULT, 0, d); break;
486 case DBTYPE_I8: hr = VarBstrFromI8(*(LONGLONG*)src, LOCALE_USER_DEFAULT, 0, d); break;
487 case DBTYPE_UI8: hr = VarBstrFromUI8(*(ULONGLONG*)src, LOCALE_USER_DEFAULT, 0, d); break;
488 case DBTYPE_GUID:
489 {
490 WCHAR szBuff[39];
491 const GUID *id = (const GUID *)src;
492 WCHAR format[] = {
493 '{','%','0','8','X','-','%','0','4','X','-','%','0','4','X','-',
494 '%','0','2','X','%','0','2','X','-',
495 '%','0','2','X','%','0','2','X','%','0','2','X','%','0','2','X','%','0','2','X','%','0','2','X','}',0};
496 wsprintfW(szBuff, format,
497 id->Data1, id->Data2, id->Data3,
498 id->Data4[0], id->Data4[1], id->Data4[2], id->Data4[3],
499 id->Data4[4], id->Data4[5], id->Data4[6], id->Data4[7] );
500 *d = SysAllocString(szBuff);
501 hr = *d ? S_OK : E_OUTOFMEMORY;
502 }
503 break;
504 case DBTYPE_BYTES:
505 {
506 *d = SysAllocStringLen(NULL, 2 * src_len);
507 if (*d == NULL)
508 hr = E_OUTOFMEMORY;
509 else
510 {
511 const char hexchars[] = "0123456789ABCDEF";
512 WCHAR *s = *d;
513 unsigned char *p = src;
514 while (src_len > 0)
515 {
516 *s++ = hexchars[(*p >> 4) & 0x0F];
517 *s++ = hexchars[(*p) & 0x0F];
518 src_len--; p++;
519 }
520 hr = S_OK;
521 }
522 }
523 break;
524 case DBTYPE_VARIANT:
525 VariantInit(&tmp);
526 if ((hr = VariantChangeType(&tmp, (VARIANT*)src, 0, VT_BSTR)) == S_OK)
527 *d = V_BSTR(&tmp);
528 break;
529 default: FIXME("Unimplemented conversion %04x -> BSTR\n", src_type); return E_NOTIMPL;
530 }
531 break;
532 }
533
534 case DBTYPE_UI1:
535 {
536 BYTE *d = dst;
537 switch(src_type)
538 {
539 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
540 case DBTYPE_I2: hr = VarUI1FromI2(*(signed short*)src, d); break;
541 case DBTYPE_I4: hr = VarUI1FromI4(*(signed int*)src, d); break;
542 case DBTYPE_R4: hr = VarUI1FromR4(*(FLOAT*)src, d); break;
543 case DBTYPE_R8: hr = VarUI1FromR8(*(double*)src, d); break;
544 case DBTYPE_CY: hr = VarUI1FromCy(*(CY*)src, d); break;
545 case DBTYPE_DATE: hr = VarUI1FromDate(*(DATE*)src, d); break;
546 case DBTYPE_BSTR: hr = VarUI1FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
547 case DBTYPE_BOOL: hr = VarUI1FromBool(*(VARIANT_BOOL*)src, d); break;
548 case DBTYPE_DECIMAL: hr = VarUI1FromDec((DECIMAL*)src, d); break;
549 case DBTYPE_I1: hr = VarUI1FromI1(*(signed char*)src, d); break;
550 case DBTYPE_UI1: *d = *(BYTE*)src; hr = S_OK; break;
551 case DBTYPE_UI2: hr = VarUI1FromUI2(*(WORD*)src, d); break;
552 case DBTYPE_UI4: hr = VarUI1FromUI4(*(DWORD*)src, d); break;
553 case DBTYPE_I8: hr = VarUI1FromI8(*(LONGLONG*)src, d); break;
554 case DBTYPE_UI8: hr = VarUI1FromUI8(*(ULONGLONG*)src, d); break;
555 default: FIXME("Unimplemented conversion %04x -> UI1\n", src_type); return E_NOTIMPL;
556 }
557 break;
558 }
559 case DBTYPE_UI2:
560 {
561 WORD *d = dst;
562 switch(src_type)
563 {
564 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
565 case DBTYPE_I2: hr = VarUI2FromI2(*(signed short*)src, d); break;
566 case DBTYPE_I4: hr = VarUI2FromI4(*(signed int*)src, d); break;
567 case DBTYPE_R4: hr = VarUI2FromR4(*(FLOAT*)src, d); break;
568 case DBTYPE_R8: hr = VarUI2FromR8(*(double*)src, d); break;
569 case DBTYPE_CY: hr = VarUI2FromCy(*(CY*)src, d); break;
570 case DBTYPE_DATE: hr = VarUI2FromDate(*(DATE*)src, d); break;
571 case DBTYPE_BSTR: hr = VarUI2FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
572 case DBTYPE_BOOL: hr = VarUI2FromBool(*(VARIANT_BOOL*)src, d); break;
573 case DBTYPE_DECIMAL: hr = VarUI2FromDec((DECIMAL*)src, d); break;
574 case DBTYPE_I1: hr = VarUI2FromI1(*(signed char*)src, d); break;
575 case DBTYPE_UI1: hr = VarUI2FromUI1(*(BYTE*)src, d); break;
576 case DBTYPE_UI2: *d = *(WORD*)src; hr = S_OK; break;
577 case DBTYPE_UI4: hr = VarUI2FromUI4(*(DWORD*)src, d); break;
578 case DBTYPE_I8: hr = VarUI2FromI8(*(LONGLONG*)src, d); break;
579 case DBTYPE_UI8: hr = VarUI2FromUI8(*(ULONGLONG*)src, d); break;
580 default: FIXME("Unimplemented conversion %04x -> UI2\n", src_type); return E_NOTIMPL;
581 }
582 break;
583 }
584
585 case DBTYPE_UI4:
586 {
587 DWORD *d = dst;
588 switch(src_type)
589 {
590 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
591 case DBTYPE_I2: hr = VarUI4FromI2(*(signed short*)src, d); break;
592 case DBTYPE_I4: hr = VarUI4FromI4(*(signed int*)src, d); break;
593 case DBTYPE_R4: hr = VarUI4FromR4(*(FLOAT*)src, d); break;
594 case DBTYPE_R8: hr = VarUI4FromR8(*(double*)src, d); break;
595 case DBTYPE_CY: hr = VarUI4FromCy(*(CY*)src, d); break;
596 case DBTYPE_DATE: hr = VarUI4FromDate(*(DATE*)src, d); break;
597 case DBTYPE_BSTR: hr = VarUI4FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
598 case DBTYPE_BOOL: hr = VarUI4FromBool(*(VARIANT_BOOL*)src, d); break;
599 case DBTYPE_DECIMAL: hr = VarUI4FromDec((DECIMAL*)src, d); break;
600 case DBTYPE_I1: hr = VarUI4FromI1(*(signed char*)src, d); break;
601 case DBTYPE_UI1: hr = VarUI4FromUI1(*(BYTE*)src, d); break;
602 case DBTYPE_UI2: hr = VarUI4FromUI2(*(WORD*)src, d); break;
603 case DBTYPE_UI4: *d = *(DWORD*)src; hr = S_OK; break;
604 case DBTYPE_I8: hr = VarUI4FromI8(*(LONGLONG*)src, d); break;
605 case DBTYPE_UI8: hr = VarUI4FromUI8(*(ULONGLONG*)src, d); break;
606 case DBTYPE_VARIANT:
607 VariantInit(&tmp);
608 if ((hr = VariantChangeType(&tmp, (VARIANT*)src, 0, VT_UI4)) == S_OK)
609 *d = V_UI4(&tmp);
610 break;
611 default: FIXME("Unimplemented conversion %04x -> UI4\n", src_type); return E_NOTIMPL;
612 }
613 break;
614 }
615
616 case DBTYPE_UI8:
617 {
618 ULONGLONG *d = dst;
619 switch(src_type)
620 {
621 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
622 case DBTYPE_I2: hr = VarUI8FromI2(*(signed short*)src, d); break;
623 case DBTYPE_I4: {LONGLONG s = *(signed int*)src; hr = VarUI8FromI8(s, d); break;}
624 case DBTYPE_R4: hr = VarUI8FromR4(*(FLOAT*)src, d); break;
625 case DBTYPE_R8: hr = VarUI8FromR8(*(double*)src, d); break;
626 case DBTYPE_CY: hr = VarUI8FromCy(*(CY*)src, d); break;
627 case DBTYPE_DATE: hr = VarUI8FromDate(*(DATE*)src, d); break;
628 case DBTYPE_BSTR: hr = VarUI8FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
629 case DBTYPE_BOOL: hr = VarUI8FromBool(*(VARIANT_BOOL*)src, d); break;
630 case DBTYPE_DECIMAL: hr = VarUI8FromDec((DECIMAL*)src, d); break;
631 case DBTYPE_I1: hr = VarUI8FromI1(*(signed char*)src, d); break;
632 case DBTYPE_UI1: hr = VarUI8FromUI1(*(BYTE*)src, d); break;
633 case DBTYPE_UI2: hr = VarUI8FromUI2(*(WORD*)src, d); break;
634 case DBTYPE_UI4: hr = VarUI8FromUI4(*(DWORD*)src, d); break;
635 case DBTYPE_I8: hr = VarUI8FromI8(*(LONGLONG*)src, d); break;
636 case DBTYPE_UI8: *d = *(ULONGLONG*)src; hr = S_OK; break;
637 default: FIXME("Unimplemented conversion %04x -> UI8\n", src_type); return E_NOTIMPL;
638 }
639 break;
640 }
641
642 case DBTYPE_FILETIME:
643 {
644 FILETIME *d = dst;
645 switch(src_type)
646 {
647 case DBTYPE_EMPTY: d->dwLowDateTime = d->dwHighDateTime = 0; hr = S_OK; break;
648 case DBTYPE_FILETIME: *d = *(FILETIME*)src; hr = S_OK; break;
649 default: FIXME("Unimplemented conversion %04x -> FILETIME\n", src_type); return E_NOTIMPL;
650 }
651 break;
652 }
653
654 case DBTYPE_GUID:
655 {
656 GUID *d = dst;
657 switch(src_type)
658 {
659 case DBTYPE_EMPTY: *d = GUID_NULL; hr = S_OK; break;
660 case DBTYPE_GUID: *d = *(GUID*)src; hr = S_OK; break;
661 default: FIXME("Unimplemented conversion %04x -> GUID\n", src_type); return E_NOTIMPL;
662 }
663 break;
664 }
665
666 case DBTYPE_WSTR:
667 {
668 BSTR b;
669 DBLENGTH bstr_len;
670 INT bytes_to_copy;
671 hr = IDataConvert_DataConvert(iface, src_type, DBTYPE_BSTR, src_len, &bstr_len,
672 src, &b, sizeof(BSTR), src_status, dst_status,
673 precision, scale, flags);
674 if(hr != S_OK) return hr;
675 bstr_len = SysStringLen(b);
676 *dst_len = bstr_len * sizeof(WCHAR); /* Doesn't include size for '\0' */
677 *dst_status = DBSTATUS_S_OK;
678 bytes_to_copy = min(*dst_len + sizeof(WCHAR), dst_max_len);
679 if(dst)
680 {
681 if(bytes_to_copy >= sizeof(WCHAR))
682 {
683 memcpy(dst, b, bytes_to_copy - sizeof(WCHAR));
684 *((WCHAR*)dst + bytes_to_copy / sizeof(WCHAR) - 1) = 0;
685 if(bytes_to_copy < *dst_len + sizeof(WCHAR))
686 *dst_status = DBSTATUS_S_TRUNCATED;
687 }
688 else
689 {
690 *dst_status = DBSTATUS_E_DATAOVERFLOW;
691 hr = DB_E_ERRORSOCCURRED;
692 }
693 }
694 SysFreeString(b);
695 return hr;
696 }
697 case DBTYPE_STR:
698 {
699 BSTR b;
700 DBLENGTH bstr_len;
701 INT bytes_to_copy;
702 hr = IDataConvert_DataConvert(iface, src_type, DBTYPE_BSTR, src_len, &bstr_len,
703 src, &b, sizeof(BSTR), src_status, dst_status,
704 precision, scale, flags);
705 if(hr != S_OK) return hr;
706 bstr_len = SysStringLen(b);
707 *dst_len = bstr_len * sizeof(char); /* Doesn't include size for '\0' */
708 *dst_status = DBSTATUS_S_OK;
709 bytes_to_copy = min(*dst_len + sizeof(char), dst_max_len);
710 if(dst)
711 {
712 if(bytes_to_copy >= sizeof(char))
713 {
714 WideCharToMultiByte(CP_ACP, 0, b, bytes_to_copy - sizeof(char), dst, dst_max_len, NULL, NULL);
715 *((char *)dst + bytes_to_copy / sizeof(char) - 1) = 0;
716 if(bytes_to_copy < *dst_len + sizeof(char))
717 *dst_status = DBSTATUS_S_TRUNCATED;
718 }
719 else
720 {
721 *dst_status = DBSTATUS_E_DATAOVERFLOW;
722 hr = DB_E_ERRORSOCCURRED;
723 }
724 }
725 SysFreeString(b);
726 return hr;
727 }
728
729 case DBTYPE_BYREF | DBTYPE_WSTR:
730 {
731 BSTR b;
732 WCHAR **d = dst;
733 DBLENGTH bstr_len;
734 hr = IDataConvert_DataConvert(iface, src_type, DBTYPE_BSTR, src_len, &bstr_len,
735 src, &b, sizeof(BSTR), src_status, dst_status,
736 precision, scale, flags);
737 if(hr != S_OK) return hr;
738
739 bstr_len = SysStringLen(b) * sizeof(WCHAR);
740 *dst_len = bstr_len; /* Doesn't include size for '\0' */
741
742 *d = CoTaskMemAlloc(bstr_len + sizeof(WCHAR));
743 if(*d) memcpy(*d, b, bstr_len + sizeof(WCHAR));
744 else hr = E_OUTOFMEMORY;
745 SysFreeString(b);
746 return hr;
747 }
748
749 case DBTYPE_VARIANT:
750 {
751 VARIANT *v = dst;
752
753 switch(src_type)
754 {
755 case DBTYPE_BOOL:
756 V_VT(v) = VT_BOOL;
757 V_BOOL(v) = *(VARIANT_BOOL*)src;
758 hr = S_OK;
759 break;
760 case DBTYPE_I4:
761 V_VT(v) = VT_I4;
762 V_I4(v) = *(signed int*)src;
763 hr = S_OK;
764 break;
765 case DBTYPE_I8:
766 V_VT(v) = VT_DECIMAL;
767 hr = VarDecFromI8( *(LONGLONG*)src, &V_DECIMAL(v));
768 break;
769 case DBTYPE_R8:
770 V_VT(v) = VT_R8;
771 V_R8(v) = *(double*)src;
772 hr = S_OK;
773 break;
774 case DBTYPE_BSTR:
775 {
776 BSTR s = *(WCHAR**)src;
777 TRACE("%s\n", debugstr_w(s));
778 V_VT(v) = VT_BSTR;
779 V_BSTR(v) = SysAllocString(s);
780 hr = V_BSTR(v) ? S_OK : E_OUTOFMEMORY;
781 break;
782 }
783 case DBTYPE_DATE:
784 V_VT(v) = VT_DATE;
785 V_DATE(v) = *(DATE*)src;
786 hr = S_OK;
787 break;
788 case DBTYPE_CY:
789 V_VT(v) = VT_CY;
790 V_CY(v) = *(CY*)src;
791 hr = S_OK;
792 break;
793 default: FIXME("Unimplemented conversion %04x -> VARIANT\n", src_type); return E_NOTIMPL;
794 }
795 break;
796 }
797
798 default:
799 FIXME("Unimplemented conversion %04x -> %04x\n", src_type, dst_type);
800 return E_NOTIMPL;
801 }
802
803 if(hr == DISP_E_OVERFLOW)
804 {
805 *dst_status = DBSTATUS_E_DATAOVERFLOW;
806 *dst_len = get_length(dst_type);
807 hr = DB_E_ERRORSOCCURRED;
808 }
809 else if(hr == S_OK)
810 {
811 *dst_status = DBSTATUS_S_OK;
812 *dst_len = get_length(dst_type);
813 }
814
815 return hr;
816 }
817
818 static inline WORD get_dbtype_class(DBTYPE type)
819 {
820 switch(type)
821 {
822 case DBTYPE_I2:
823 case DBTYPE_R4:
824 case DBTYPE_R8:
825 case DBTYPE_I1:
826 case DBTYPE_UI1:
827 case DBTYPE_UI2:
828 return DBTYPE_I2;
829
830 case DBTYPE_I4:
831 case DBTYPE_UI4:
832 return DBTYPE_I4;
833
834 case DBTYPE_I8:
835 case DBTYPE_UI8:
836 return DBTYPE_I8;
837
838 case DBTYPE_BSTR:
839 case DBTYPE_STR:
840 case DBTYPE_WSTR:
841 return DBTYPE_BSTR;
842
843 case DBTYPE_DBDATE:
844 case DBTYPE_DBTIME:
845 case DBTYPE_DBTIMESTAMP:
846 return DBTYPE_DBDATE;
847 }
848 return type;
849 }
850
851 /* Many src types will convert to this group of dst types */
852 static inline BOOL common_class(WORD dst_class)
853 {
854 switch(dst_class)
855 {
856 case DBTYPE_EMPTY:
857 case DBTYPE_NULL:
858 case DBTYPE_I2:
859 case DBTYPE_I4:
860 case DBTYPE_BSTR:
861 case DBTYPE_BOOL:
862 case DBTYPE_VARIANT:
863 case DBTYPE_I8:
864 case DBTYPE_CY:
865 case DBTYPE_DECIMAL:
866 case DBTYPE_NUMERIC:
867 return TRUE;
868 }
869 return FALSE;
870 }
871
872 static inline BOOL array_type(DBTYPE type)
873 {
874 return (type >= DBTYPE_I2 && type <= DBTYPE_UI4);
875 }
876
877 static HRESULT WINAPI convert_CanConvert(IDataConvert* iface,
878 DBTYPE src_type, DBTYPE dst_type)
879 {
880 convert *This = impl_from_IDataConvert(iface);
881 DBTYPE src_base_type = src_type & 0x1ff;
882 DBTYPE dst_base_type = dst_type & 0x1ff;
883 WORD dst_class = get_dbtype_class(dst_base_type);
884
885 TRACE("(%p)->(%d, %d)\n", This, src_type, dst_type);
886
887 if(src_type & DBTYPE_VECTOR || dst_type & DBTYPE_VECTOR) return S_FALSE;
888
889 if(src_type & DBTYPE_ARRAY)
890 {
891 if(!array_type(src_base_type)) return S_FALSE;
892 if(dst_type & DBTYPE_ARRAY)
893 {
894 if(src_type == dst_type) return S_OK;
895 return S_FALSE;
896 }
897 if(dst_type == DBTYPE_VARIANT) return S_OK;
898 return S_FALSE;
899 }
900
901 if(dst_type & DBTYPE_ARRAY)
902 {
903 if(!array_type(dst_base_type)) return S_FALSE;
904 if(src_type == DBTYPE_IDISPATCH || src_type == DBTYPE_VARIANT) return S_OK;
905 return S_FALSE;
906 }
907
908 if(dst_type & DBTYPE_BYREF)
909 if(dst_base_type != DBTYPE_BYTES && dst_base_type != DBTYPE_STR && dst_base_type != DBTYPE_WSTR)
910 return S_FALSE;
911
912 switch(get_dbtype_class(src_base_type))
913 {
914 case DBTYPE_EMPTY:
915 if(common_class(dst_class)) return S_OK;
916 switch(dst_class)
917 {
918 case DBTYPE_DATE:
919 case DBTYPE_GUID:
920 case DBTYPE_FILETIME:
921 return S_OK;
922 default:
923 if(dst_base_type == DBTYPE_DBTIMESTAMP) return S_OK;
924 return S_FALSE;
925 }
926
927 case DBTYPE_NULL:
928 switch(dst_base_type)
929 {
930 case DBTYPE_NULL:
931 case DBTYPE_VARIANT:
932 case DBTYPE_FILETIME: return S_OK;
933 default: return S_FALSE;
934 }
935
936 case DBTYPE_I4:
937 if(dst_base_type == DBTYPE_BYTES) return S_OK;
938 /* fall through */
939 case DBTYPE_I2:
940 if(dst_base_type == DBTYPE_DATE) return S_OK;
941 /* fall through */
942 case DBTYPE_DECIMAL:
943 if(common_class(dst_class)) return S_OK;
944 if(dst_class == DBTYPE_DBDATE) return S_OK;
945 return S_FALSE;
946
947 case DBTYPE_BOOL:
948 if(dst_base_type == DBTYPE_DATE) return S_OK;
949 /* fall through */
950 case DBTYPE_NUMERIC:
951 case DBTYPE_CY:
952 if(common_class(dst_class)) return S_OK;
953 return S_FALSE;
954
955 case DBTYPE_I8:
956 if(common_class(dst_class)) return S_OK;
957 switch(dst_base_type)
958 {
959 case DBTYPE_BYTES:
960 case DBTYPE_FILETIME: return S_OK;
961 default: return S_FALSE;
962 }
963
964 case DBTYPE_DATE:
965 switch(dst_class)
966 {
967 case DBTYPE_EMPTY:
968 case DBTYPE_NULL:
969 case DBTYPE_I2:
970 case DBTYPE_I4:
971 case DBTYPE_BSTR:
972 case DBTYPE_BOOL:
973 case DBTYPE_VARIANT:
974 case DBTYPE_I8:
975 case DBTYPE_DATE:
976 case DBTYPE_DBDATE:
977 case DBTYPE_FILETIME:
978 return S_OK;
979 default: return S_FALSE;
980 }
981
982 case DBTYPE_IDISPATCH:
983 case DBTYPE_VARIANT:
984 switch(dst_base_type)
985 {
986 case DBTYPE_IDISPATCH:
987 case DBTYPE_ERROR:
988 case DBTYPE_IUNKNOWN:
989 return S_OK;
990 }
991 /* fall through */
992 case DBTYPE_BSTR:
993 if(common_class(dst_class)) return S_OK;
994 switch(dst_class)
995 {
996 case DBTYPE_DATE:
997 case DBTYPE_GUID:
998 case DBTYPE_BYTES:
999 case DBTYPE_DBDATE:
1000 case DBTYPE_FILETIME:
1001 return S_OK;
1002 default: return S_FALSE;
1003 }
1004
1005 case DBTYPE_ERROR:
1006 switch(dst_base_type)
1007 {
1008 case DBTYPE_BSTR:
1009 case DBTYPE_ERROR:
1010 case DBTYPE_VARIANT:
1011 case DBTYPE_WSTR:
1012 return S_OK;
1013 default: return S_FALSE;
1014 }
1015
1016 case DBTYPE_IUNKNOWN:
1017 switch(dst_base_type)
1018 {
1019 case DBTYPE_EMPTY:
1020 case DBTYPE_NULL:
1021 case DBTYPE_IDISPATCH:
1022 case DBTYPE_VARIANT:
1023 case DBTYPE_IUNKNOWN:
1024 return S_OK;
1025 default: return S_FALSE;
1026 }
1027
1028 case DBTYPE_BYTES:
1029 if(dst_class == DBTYPE_I4 || dst_class == DBTYPE_I8) return S_OK;
1030 /* fall through */
1031 case DBTYPE_GUID:
1032 switch(dst_class)
1033 {
1034 case DBTYPE_EMPTY:
1035 case DBTYPE_NULL:
1036 case DBTYPE_BSTR:
1037 case DBTYPE_VARIANT:
1038 case DBTYPE_GUID:
1039 case DBTYPE_BYTES:
1040 return S_OK;
1041 default: return S_FALSE;
1042 }
1043
1044 case DBTYPE_FILETIME:
1045 if(dst_class == DBTYPE_I8) return S_OK;
1046 /* fall through */
1047 case DBTYPE_DBDATE:
1048 switch(dst_class)
1049 {
1050 case DBTYPE_EMPTY:
1051 case DBTYPE_NULL:
1052 case DBTYPE_DATE:
1053 case DBTYPE_BSTR:
1054 case DBTYPE_VARIANT:
1055 case DBTYPE_DBDATE:
1056 case DBTYPE_FILETIME:
1057 return S_OK;
1058 default: return S_FALSE;
1059 }
1060
1061 }
1062 return S_FALSE;
1063 }
1064
1065 static HRESULT WINAPI convert_GetConversionSize(IDataConvert* iface,
1066 DBTYPE src_type, DBTYPE dst_type,
1067 DBLENGTH *src_len, DBLENGTH *dst_len,
1068 void *src)
1069 {
1070 convert *This = impl_from_IDataConvert(iface);
1071 HRESULT hr;
1072
1073 TRACE("(%p)->(%d, %d, %p, %p, %p)\n", This, src_type, dst_type, src_len, dst_len, src);
1074
1075 hr = IDataConvert_CanConvert(iface, src_type, dst_type);
1076 if (hr != S_OK)
1077 return DB_E_UNSUPPORTEDCONVERSION;
1078
1079 if (!dst_len)
1080 return E_INVALIDARG;
1081
1082 /* for some types we don't need to look into source data */
1083 if ((*dst_len = get_length(dst_type)))
1084 return S_OK;
1085
1086 switch (dst_type)
1087 {
1088 case DBTYPE_STR:
1089 {
1090 switch (src_type)
1091 {
1092 case DBTYPE_VARIANT:
1093 {
1094 VARIANT v;
1095
1096 VariantInit(&v);
1097 if ((hr = VariantChangeType(&v, (VARIANT*)src, 0, VT_BSTR)) == S_OK)
1098 {
1099 *dst_len = WideCharToMultiByte(CP_ACP, 0, V_BSTR(&v), -1, NULL, 0, NULL, NULL);
1100 VariantClear(&v);
1101 }
1102 else
1103 return hr;
1104 }
1105 break;
1106 default:
1107 FIXME("unimplemented for %04x -> DBTYPE_STR\n", src_type);
1108 return E_NOTIMPL;
1109 }
1110 }
1111 break;
1112 case DBTYPE_WSTR:
1113 {
1114 switch (src_type)
1115 {
1116 case DBTYPE_VARIANT:
1117 {
1118 VARIANT v;
1119
1120 VariantInit(&v);
1121 if ((hr = VariantChangeType(&v, (VARIANT*)src, 0, VT_BSTR)) == S_OK)
1122 {
1123 *dst_len = (SysStringLen(V_BSTR(&v)) + 1) * sizeof(WCHAR);
1124 VariantClear(&v);
1125 }
1126 else
1127 return hr;
1128 }
1129 break;
1130 case DBTYPE_STR:
1131 if(src_len)
1132 *dst_len = (*src_len + 1) * sizeof(WCHAR);
1133 else
1134 *dst_len = (strlen(src) + 1) * sizeof(WCHAR);
1135 break;
1136 case DBTYPE_WSTR:
1137 if(src_len)
1138 *dst_len = (*src_len) + sizeof(WCHAR);
1139 else
1140 *dst_len = (lstrlenW(src) + 1) * sizeof(WCHAR);
1141 break;
1142 default:
1143 FIXME("unimplemented for %04x -> DBTYPE_WSTR\n", src_type);
1144 return E_NOTIMPL;
1145 }
1146 }
1147 break;
1148 default:
1149 FIXME("unimplemented for conversion %d->%d\n", src_type, dst_type);
1150 return E_NOTIMPL;
1151 }
1152
1153 return S_OK;
1154 }
1155
1156 static const struct IDataConvertVtbl convert_vtbl =
1157 {
1158 convert_QueryInterface,
1159 convert_AddRef,
1160 convert_Release,
1161 convert_DataConvert,
1162 convert_CanConvert,
1163 convert_GetConversionSize
1164 };
1165
1166 static HRESULT WINAPI dcinfo_QueryInterface(IDCInfo* iface, REFIID riid, void **obj)
1167 {
1168 convert *This = impl_from_IDCInfo(iface);
1169
1170 return IDataConvert_QueryInterface(&This->IDataConvert_iface, riid, obj);
1171 }
1172
1173 static ULONG WINAPI dcinfo_AddRef(IDCInfo* iface)
1174 {
1175 convert *This = impl_from_IDCInfo(iface);
1176
1177 return IDataConvert_AddRef(&This->IDataConvert_iface);
1178 }
1179
1180 static ULONG WINAPI dcinfo_Release(IDCInfo* iface)
1181 {
1182 convert *This = impl_from_IDCInfo(iface);
1183
1184 return IDataConvert_Release(&This->IDataConvert_iface);
1185 }
1186
1187 static HRESULT WINAPI dcinfo_GetInfo(IDCInfo *iface, ULONG num, DCINFOTYPE types[], DCINFO **info_ptr)
1188 {
1189 convert *This = impl_from_IDCInfo(iface);
1190 ULONG i;
1191 DCINFO *infos;
1192
1193 TRACE("(%p)->(%d, %p, %p)\n", This, num, types, info_ptr);
1194
1195 *info_ptr = infos = CoTaskMemAlloc(num * sizeof(*infos));
1196 if(!infos) return E_OUTOFMEMORY;
1197
1198 for(i = 0; i < num; i++)
1199 {
1200 infos[i].eInfoType = types[i];
1201 VariantInit(&infos[i].vData);
1202
1203 switch(types[i])
1204 {
1205 case DCINFOTYPE_VERSION:
1206 V_VT(&infos[i].vData) = VT_UI4;
1207 V_UI4(&infos[i].vData) = This->version;
1208 break;
1209 }
1210 }
1211
1212 return S_OK;
1213 }
1214
1215 static HRESULT WINAPI dcinfo_SetInfo(IDCInfo* iface, ULONG num, DCINFO info[])
1216 {
1217 convert *This = impl_from_IDCInfo(iface);
1218 ULONG i;
1219 HRESULT hr = S_OK;
1220
1221 TRACE("(%p)->(%d, %p)\n", This, num, info);
1222
1223 for(i = 0; i < num; i++)
1224 {
1225 switch(info[i].eInfoType)
1226 {
1227 case DCINFOTYPE_VERSION:
1228 if(V_VT(&info[i].vData) != VT_UI4)
1229 {
1230 FIXME("VERSION with vt %x\n", V_VT(&info[i].vData));
1231 hr = DB_S_ERRORSOCCURRED;
1232 break;
1233 }
1234 This->version = V_UI4(&info[i].vData);
1235 break;
1236
1237 default:
1238 FIXME("Unhandled info type %d (vt %x)\n", info[i].eInfoType, V_VT(&info[i].vData));
1239 }
1240 }
1241 return hr;
1242 }
1243
1244 static const struct IDCInfoVtbl dcinfo_vtbl =
1245 {
1246 dcinfo_QueryInterface,
1247 dcinfo_AddRef,
1248 dcinfo_Release,
1249 dcinfo_GetInfo,
1250 dcinfo_SetInfo
1251 };
1252
1253 HRESULT create_oledb_convert(IUnknown *outer, void **obj)
1254 {
1255 convert *This;
1256
1257 TRACE("(%p, %p)\n", outer, obj);
1258
1259 *obj = NULL;
1260
1261 if(outer) return CLASS_E_NOAGGREGATION;
1262
1263 This = HeapAlloc(GetProcessHeap(), 0, sizeof(*This));
1264 if(!This) return E_OUTOFMEMORY;
1265
1266 This->IDataConvert_iface.lpVtbl = &convert_vtbl;
1267 This->IDCInfo_iface.lpVtbl = &dcinfo_vtbl;
1268 This->ref = 1;
1269 This->version = 0x110;
1270
1271 *obj = &This->IDataConvert_iface;
1272
1273 return S_OK;
1274 }
Maarten's multimedia branch