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oledb32: Implement GetConversionSize DBTYPE_STR->DBTYPE_WSTR.
[wine/multimedia.git] / dlls / oledb32 / convert.c
blobf2c4c29bad5f83f17424335e0de82e48ef70a6e8
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 HRESULT hr;
169
170 TRACE("(%p)->(%d, %d, %ld, %p, %p, %p, %ld, %d, %p, %d, %d, %x)\n", This,
171 src_type, dst_type, src_len, dst_len, src, dst, dst_max_len,
172 src_status, dst_status, precision, scale, flags);
173
174 if (!dst_len) dst_len = &dst_len_loc;
175 if (!dst_status) dst_status = &dst_status_loc;
176
177 *dst_status = DBSTATUS_E_BADACCESSOR;
178
179 if(IDataConvert_CanConvert(iface, src_type, dst_type) != S_OK)
180 {
181 return DB_E_UNSUPPORTEDCONVERSION;
182 }
183
184 if(src_type == DBTYPE_STR)
185 {
186 BSTR b;
187 DWORD len;
188
189 if(flags & DBDATACONVERT_LENGTHFROMNTS)
190 len = MultiByteToWideChar(CP_ACP, 0, src, -1, NULL, 0) - 1;
191 else
192 len = MultiByteToWideChar(CP_ACP, 0, src, src_len, NULL, 0);
193 b = SysAllocStringLen(NULL, len);
194 if(!b) return E_OUTOFMEMORY;
195 if(flags & DBDATACONVERT_LENGTHFROMNTS)
196 MultiByteToWideChar(CP_ACP, 0, src, -1, b, len + 1);
197 else
198 MultiByteToWideChar(CP_ACP, 0, src, src_len, b, len);
199
200 hr = IDataConvert_DataConvert(iface, DBTYPE_BSTR, dst_type, 0, dst_len,
201 &b, dst, dst_max_len, src_status, dst_status,
202 precision, scale, flags);
203
204 SysFreeString(b);
205 return hr;
206 }
207
208 if(src_type == DBTYPE_WSTR)
209 {
210 BSTR b;
211
212 if(flags & DBDATACONVERT_LENGTHFROMNTS)
213 b = SysAllocString(src);
214 else
215 b = SysAllocStringLen(src, src_len / 2);
216 if(!b) return E_OUTOFMEMORY;
217 hr = IDataConvert_DataConvert(iface, DBTYPE_BSTR, dst_type, 0, dst_len,
218 &b, dst, dst_max_len, src_status, dst_status,
219 precision, scale, flags);
220 SysFreeString(b);
221 return hr;
222 }
223
224 switch(dst_type)
225 {
226 case DBTYPE_I2:
227 {
228 signed short *d = dst;
229 VARIANT tmp;
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 VARIANT tmp;
262 switch(src_type)
263 {
264 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
265 case DBTYPE_I2: hr = VarI4FromI2(*(signed short*)src, d); break;
266 case DBTYPE_I4: *d = *(signed int*)src; hr = S_OK; break;
267 case DBTYPE_R4: hr = VarI4FromR4(*(FLOAT*)src, d); break;
268 case DBTYPE_R8: hr = VarI4FromR8(*(double*)src, d); break;
269 case DBTYPE_CY: hr = VarI4FromCy(*(CY*)src, d); break;
270 case DBTYPE_DATE: hr = VarI4FromDate(*(DATE*)src, d); break;
271 case DBTYPE_BSTR: hr = VarI4FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
272 case DBTYPE_BOOL: hr = VarI4FromBool(*(VARIANT_BOOL*)src, d); break;
273 case DBTYPE_DECIMAL: hr = VarI4FromDec((DECIMAL*)src, d); break;
274 case DBTYPE_I1: hr = VarI4FromI1(*(signed char*)src, d); break;
275 case DBTYPE_UI1: hr = VarI4FromUI1(*(BYTE*)src, d); break;
276 case DBTYPE_UI2: hr = VarI4FromUI2(*(WORD*)src, d); break;
277 case DBTYPE_UI4: hr = VarI4FromUI4(*(DWORD*)src, d); break;
278 case DBTYPE_I8: hr = VarI4FromI8(*(LONGLONG*)src, d); break;
279 case DBTYPE_UI8: hr = VarI4FromUI8(*(ULONGLONG*)src, d); break;
280 case DBTYPE_VARIANT:
281 VariantInit(&tmp);
282 if ((hr = VariantChangeType(&tmp, (VARIANT*)src, 0, VT_I4)) == S_OK)
283 *d = V_I4(&tmp);
284 break;
285 default: FIXME("Unimplemented conversion %04x -> I4\n", src_type); return E_NOTIMPL;
286 }
287 break;
288 }
289
290 case DBTYPE_I8:
291 {
292 LONGLONG *d = dst;
293 switch(src_type)
294 {
295 case DBTYPE_BSTR: hr = VarI8FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
296 case DBTYPE_I8: *d = *(LONGLONG*)src; hr = S_OK; break;
297 default: FIXME("Unimplemented conversion %04x -> I8\n", src_type); return E_NOTIMPL;
298 }
299 break;
300 }
301
302 case DBTYPE_R4:
303 {
304 FLOAT *d = dst;
305 switch(src_type)
306 {
307 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
308 case DBTYPE_I2: hr = VarR4FromI2(*(signed short*)src, d); break;
309 case DBTYPE_I4: hr = VarR4FromI4(*(signed int*)src, d); break;
310 case DBTYPE_R4: *d = *(FLOAT*)src; hr = S_OK; break;
311 case DBTYPE_R8: hr = VarR4FromR8(*(double*)src, d); break;
312 case DBTYPE_CY: hr = VarR4FromCy(*(CY*)src, d); break;
313 case DBTYPE_DATE: hr = VarR4FromDate(*(DATE*)src, d); break;
314 case DBTYPE_BSTR: hr = VarR4FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
315 case DBTYPE_BOOL: hr = VarR4FromBool(*(VARIANT_BOOL*)src, d); break;
316 case DBTYPE_DECIMAL: hr = VarR4FromDec((DECIMAL*)src, d); break;
317 case DBTYPE_I1: hr = VarR4FromI1(*(signed char*)src, d); break;
318 case DBTYPE_UI1: hr = VarR4FromUI1(*(BYTE*)src, d); break;
319 case DBTYPE_UI2: hr = VarR4FromUI2(*(WORD*)src, d); break;
320 case DBTYPE_UI4: hr = VarR4FromUI4(*(DWORD*)src, d); break;
321 case DBTYPE_I8: hr = VarR4FromI8(*(LONGLONG*)src, d); break;
322 case DBTYPE_UI8: hr = VarR4FromUI8(*(ULONGLONG*)src, d); break;
323 default: FIXME("Unimplemented conversion %04x -> R4\n", src_type); return E_NOTIMPL;
324 }
325 break;
326 }
327 case DBTYPE_R8:
328 {
329 DOUBLE *d=dst;
330 switch (src_type)
331 {
332 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
333 case DBTYPE_I1: hr = VarR8FromI1(*(signed char*)src, d); break;
334 case DBTYPE_I2: hr = VarR8FromI2(*(signed short*)src, d); break;
335 case DBTYPE_I4: hr = VarR8FromI4(*(signed int*)src, d); break;
336 case DBTYPE_I8: hr = VarR8FromI8(*(LONGLONG*)src, d); break;
337 case DBTYPE_UI1: hr = VarR8FromUI1(*(BYTE*)src, d); break;
338 case DBTYPE_UI2: hr = VarR8FromUI2(*(WORD*)src, d); break;
339 case DBTYPE_UI4: hr = VarR8FromUI4(*(DWORD*)src, d); break;
340 case DBTYPE_UI8: hr = VarR8FromUI8(*(ULONGLONG*)src, d); break;
341 case DBTYPE_R4: hr = VarR8FromR4(*(FLOAT*)src, d); break;
342 case DBTYPE_R8: *d = *(DOUBLE*)src; hr = S_OK; break;
343 case DBTYPE_CY: hr = VarR8FromCy(*(CY*)src, d); break;
344 case DBTYPE_DATE: hr = VarR8FromDate(*(DATE*)src, d); break;
345 case DBTYPE_BSTR: hr = VarR8FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
346 case DBTYPE_BOOL: hr = VarR8FromBool(*(VARIANT_BOOL*)src, d); break;
347 case DBTYPE_DECIMAL: hr = VarR8FromDec((DECIMAL*)src, d); break;
348 default: FIXME("Unimplemented conversion %04x -> R8\n", src_type); return E_NOTIMPL;
349 }
350 break;
351 }
352 case DBTYPE_BOOL:
353 {
354 VARIANT_BOOL *d=dst;
355 switch (src_type)
356 {
357 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
358 case DBTYPE_I1: hr = VarBoolFromI1(*(signed char*)src, d); break;
359 case DBTYPE_I2: hr = VarBoolFromI2(*(signed short*)src, d); break;
360 case DBTYPE_I4: hr = VarBoolFromI4(*(signed int*)src, d); break;
361 case DBTYPE_I8: hr = VarBoolFromI8(*(LONGLONG*)src, d); break;
362 case DBTYPE_UI1: hr = VarBoolFromUI1(*(BYTE*)src, d); break;
363 case DBTYPE_UI2: hr = VarBoolFromUI2(*(WORD*)src, d); break;
364 case DBTYPE_UI4: hr = VarBoolFromUI4(*(DWORD*)src, d); break;
365 case DBTYPE_UI8: hr = VarBoolFromUI8(*(ULONGLONG*)src, d); break;
366 case DBTYPE_R4: hr = VarBoolFromR4(*(FLOAT*)src, d); break;
367 case DBTYPE_R8: hr = VarBoolFromR8(*(DOUBLE*)src, d); break;
368 case DBTYPE_CY: hr = VarBoolFromCy(*(CY*)src, d); break;
369 case DBTYPE_DATE: hr = VarBoolFromDate(*(DATE*)src, d); break;
370 case DBTYPE_BSTR: hr = VarBoolFromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
371 case DBTYPE_BOOL: *d = *(VARIANT_BOOL*)src; hr = S_OK; break;
372 case DBTYPE_DECIMAL: hr = VarBoolFromDec((DECIMAL*)src, d); break;
373 default: FIXME("Unimplemented conversion %04x -> BOOL\n", src_type); return E_NOTIMPL;
374 }
375 break;
376 }
377 case DBTYPE_DATE:
378 {
379 DATE *d=dst;
380 switch (src_type)
381 {
382 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
383 case DBTYPE_I1: hr = VarDateFromI1(*(signed char*)src, d); break;
384 case DBTYPE_I2: hr = VarDateFromI2(*(signed short*)src, d); break;
385 case DBTYPE_I4: hr = VarDateFromI4(*(signed int*)src, d); break;
386 case DBTYPE_I8: hr = VarDateFromI8(*(LONGLONG*)src, d); break;
387 case DBTYPE_UI1: hr = VarDateFromUI1(*(BYTE*)src, d); break;
388 case DBTYPE_UI2: hr = VarDateFromUI2(*(WORD*)src, d); break;
389 case DBTYPE_UI4: hr = VarDateFromUI4(*(DWORD*)src, d); break;
390 case DBTYPE_UI8: hr = VarDateFromUI8(*(ULONGLONG*)src, d); break;
391 case DBTYPE_R4: hr = VarDateFromR4(*(FLOAT*)src, d); break;
392 case DBTYPE_R8: hr = VarDateFromR8(*(DOUBLE*)src, d); break;
393 case DBTYPE_CY: hr = VarDateFromCy(*(CY*)src, d); break;
394 case DBTYPE_DATE: *d = *(DATE*)src; hr = S_OK; break;
395 case DBTYPE_BSTR: hr = VarDateFromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
396 case DBTYPE_BOOL: hr = VarDateFromBool(*(VARIANT_BOOL*)src, d); break;
397 case DBTYPE_DECIMAL: hr = VarDateFromDec((DECIMAL*)src, d); break;
398 case DBTYPE_DBTIMESTAMP:
399 {
400 SYSTEMTIME st;
401 DBTIMESTAMP *ts=(DBTIMESTAMP*)src;
402
403 st.wYear = ts->year;
404 st.wMonth = ts->month;
405 st.wDay = ts->day;
406 st.wHour = ts->hour;
407 st.wMinute = ts->minute;
408 st.wSecond = ts->second;
409 st.wMilliseconds = ts->fraction/1000000;
410 hr = (SystemTimeToVariantTime(&st, d) ? S_OK : E_FAIL);
411 break;
412 }
413 default: FIXME("Unimplemented conversion %04x -> DATE\n", src_type); return E_NOTIMPL;
414 }
415 break;
416 }
417 case DBTYPE_DBTIMESTAMP:
418 {
419 DBTIMESTAMP *d=dst;
420 switch (src_type)
421 {
422 case DBTYPE_EMPTY: memset(d, 0, sizeof(DBTIMESTAMP)); hr = S_OK; break;
423 case DBTYPE_DBTIMESTAMP: memcpy(d, src, sizeof(DBTIMESTAMP)); hr = S_OK; break;
424 case DBTYPE_DATE:
425 {
426 SYSTEMTIME st;
427 hr = (VariantTimeToSystemTime(*(double*)src, &st) ? S_OK : E_FAIL);
428 d->year = st.wYear;
429 d->month = st.wMonth;
430 d->day = st.wDay;
431 d->hour = st.wHour;
432 d->minute = st.wMinute;
433 d->second = st.wSecond;
434 d->fraction = st.wMilliseconds * 1000000;
435 break;
436 }
437 default: FIXME("Unimplemented conversion %04x -> DBTIMESTAMP\n", src_type); return E_NOTIMPL;
438 }
439 break;
440 }
441
442 case DBTYPE_CY:
443 {
444 CY *d = dst;
445 switch(src_type)
446 {
447 case DBTYPE_EMPTY: d->int64 = 0; hr = S_OK; break;
448 case DBTYPE_I2: hr = VarCyFromI2(*(signed short*)src, d); break;
449 case DBTYPE_I4: hr = VarCyFromI4(*(signed int*)src, d); break;
450 case DBTYPE_R4: hr = VarCyFromR4(*(FLOAT*)src, d); break;
451 case DBTYPE_R8: hr = VarCyFromR8(*(double*)src, d); break;
452 case DBTYPE_CY: *d = *(CY*)src; hr = S_OK; break;
453 case DBTYPE_DATE: hr = VarCyFromDate(*(DATE*)src, d); break;
454 case DBTYPE_BSTR: hr = VarCyFromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
455 case DBTYPE_BOOL: hr = VarCyFromBool(*(VARIANT_BOOL*)src, d); break;
456 case DBTYPE_DECIMAL: hr = VarCyFromDec((DECIMAL*)src, d); break;
457 case DBTYPE_I1: hr = VarCyFromI1(*(signed char*)src, d); break;
458 case DBTYPE_UI1: hr = VarCyFromUI1(*(BYTE*)src, d); break;
459 case DBTYPE_UI2: hr = VarCyFromUI2(*(WORD*)src, d); break;
460 case DBTYPE_UI4: hr = VarCyFromUI4(*(DWORD*)src, d); break;
461 case DBTYPE_I8: hr = VarCyFromI8(*(LONGLONG*)src, d); break;
462 case DBTYPE_UI8: hr = VarCyFromUI8(*(ULONGLONG*)src, d); break;
463 default: FIXME("Unimplemented conversion %04x -> CY\n", src_type); return E_NOTIMPL;
464 }
465 break;
466 }
467
468 case DBTYPE_BSTR:
469 {
470 BSTR *d = dst;
471 switch(src_type)
472 {
473 case DBTYPE_EMPTY: *d = SysAllocStringLen(NULL, 0); hr = *d ? S_OK : E_OUTOFMEMORY; break;
474 case DBTYPE_I2: hr = VarBstrFromI2(*(signed short*)src, LOCALE_USER_DEFAULT, 0, d); break;
475 case DBTYPE_I4: hr = VarBstrFromI4(*(signed int*)src, LOCALE_USER_DEFAULT, 0, d); break;
476 case DBTYPE_R4: hr = VarBstrFromR4(*(FLOAT*)src, LOCALE_USER_DEFAULT, 0, d); break;
477 case DBTYPE_R8: hr = VarBstrFromR8(*(double*)src, LOCALE_USER_DEFAULT, 0, d); break;
478 case DBTYPE_CY: hr = VarBstrFromCy(*(CY*)src, LOCALE_USER_DEFAULT, 0, d); break;
479 case DBTYPE_DATE: hr = VarBstrFromDate(*(DATE*)src, LOCALE_USER_DEFAULT, 0, d); break;
480 case DBTYPE_BSTR: *d = SysAllocStringLen(*(BSTR*)src, SysStringLen(*(BSTR*)src)); hr = *d ? S_OK : E_OUTOFMEMORY; break;
481 case DBTYPE_BOOL: hr = VarBstrFromBool(*(VARIANT_BOOL*)src, LOCALE_USER_DEFAULT, 0, d); break;
482 case DBTYPE_DECIMAL: hr = VarBstrFromDec((DECIMAL*)src, LOCALE_USER_DEFAULT, 0, d); break;
483 case DBTYPE_I1: hr = VarBstrFromI1(*(signed char*)src, LOCALE_USER_DEFAULT, 0, d); break;
484 case DBTYPE_UI1: hr = VarBstrFromUI1(*(BYTE*)src, LOCALE_USER_DEFAULT, 0, d); break;
485 case DBTYPE_UI2: hr = VarBstrFromUI2(*(WORD*)src, LOCALE_USER_DEFAULT, 0, d); break;
486 case DBTYPE_UI4: hr = VarBstrFromUI4(*(DWORD*)src, LOCALE_USER_DEFAULT, 0, d); break;
487 case DBTYPE_I8: hr = VarBstrFromI8(*(LONGLONG*)src, LOCALE_USER_DEFAULT, 0, d); break;
488 case DBTYPE_UI8: hr = VarBstrFromUI8(*(ULONGLONG*)src, LOCALE_USER_DEFAULT, 0, d); break;
489 case DBTYPE_GUID:
490 {
491 WCHAR szBuff[39];
492 const GUID *id = (const GUID *)src;
493 WCHAR format[] = {
494 '{','%','0','8','X','-','%','0','4','X','-','%','0','4','X','-',
495 '%','0','2','X','%','0','2','X','-',
496 '%','0','2','X','%','0','2','X','%','0','2','X','%','0','2','X','%','0','2','X','%','0','2','X','}',0};
497 wsprintfW(szBuff, format,
498 id->Data1, id->Data2, id->Data3,
499 id->Data4[0], id->Data4[1], id->Data4[2], id->Data4[3],
500 id->Data4[4], id->Data4[5], id->Data4[6], id->Data4[7] );
501 *d = SysAllocString(szBuff);
502 hr = *d ? S_OK : E_OUTOFMEMORY;
503 }
504 break;
505 case DBTYPE_BYTES:
506 {
507 *d = SysAllocStringLen(NULL, 2 * src_len);
508 if (*d == NULL)
509 hr = E_OUTOFMEMORY;
510 else
511 {
512 const char hexchars[] = "0123456789ABCDEF";
513 WCHAR *s = *d;
514 unsigned char *p = src;
515 while (src_len > 0)
516 {
517 *s++ = hexchars[(*p >> 4) & 0x0F];
518 *s++ = hexchars[(*p) & 0x0F];
519 src_len--; p++;
520 }
521 hr = S_OK;
522 }
523 }
524 break;
525 case DBTYPE_VARIANT:
526 {
527 VARIANT tmp;
528
529 VariantInit(&tmp);
530 if ((hr = VariantChangeType(&tmp, (VARIANT*)src, 0, VT_BSTR)) == S_OK)
531 *d = V_BSTR(&tmp);
532 }
533 break;
534 default: FIXME("Unimplemented conversion %04x -> BSTR\n", src_type); return E_NOTIMPL;
535 }
536 break;
537 }
538
539 case DBTYPE_UI1:
540 {
541 BYTE *d = dst;
542 switch(src_type)
543 {
544 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
545 case DBTYPE_I2: hr = VarUI1FromI2(*(signed short*)src, d); break;
546 case DBTYPE_I4: hr = VarUI1FromI4(*(signed int*)src, d); break;
547 case DBTYPE_R4: hr = VarUI1FromR4(*(FLOAT*)src, d); break;
548 case DBTYPE_R8: hr = VarUI1FromR8(*(double*)src, d); break;
549 case DBTYPE_CY: hr = VarUI1FromCy(*(CY*)src, d); break;
550 case DBTYPE_DATE: hr = VarUI1FromDate(*(DATE*)src, d); break;
551 case DBTYPE_BSTR: hr = VarUI1FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
552 case DBTYPE_BOOL: hr = VarUI1FromBool(*(VARIANT_BOOL*)src, d); break;
553 case DBTYPE_DECIMAL: hr = VarUI1FromDec((DECIMAL*)src, d); break;
554 case DBTYPE_I1: hr = VarUI1FromI1(*(signed char*)src, d); break;
555 case DBTYPE_UI1: *d = *(BYTE*)src; hr = S_OK; break;
556 case DBTYPE_UI2: hr = VarUI1FromUI2(*(WORD*)src, d); break;
557 case DBTYPE_UI4: hr = VarUI1FromUI4(*(DWORD*)src, d); break;
558 case DBTYPE_I8: hr = VarUI1FromI8(*(LONGLONG*)src, d); break;
559 case DBTYPE_UI8: hr = VarUI1FromUI8(*(ULONGLONG*)src, d); break;
560 default: FIXME("Unimplemented conversion %04x -> UI1\n", src_type); return E_NOTIMPL;
561 }
562 break;
563 }
564 case DBTYPE_UI2:
565 {
566 WORD *d = dst;
567 switch(src_type)
568 {
569 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
570 case DBTYPE_I2: hr = VarUI2FromI2(*(signed short*)src, d); break;
571 case DBTYPE_I4: hr = VarUI2FromI4(*(signed int*)src, d); break;
572 case DBTYPE_R4: hr = VarUI2FromR4(*(FLOAT*)src, d); break;
573 case DBTYPE_R8: hr = VarUI2FromR8(*(double*)src, d); break;
574 case DBTYPE_CY: hr = VarUI2FromCy(*(CY*)src, d); break;
575 case DBTYPE_DATE: hr = VarUI2FromDate(*(DATE*)src, d); break;
576 case DBTYPE_BSTR: hr = VarUI2FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
577 case DBTYPE_BOOL: hr = VarUI2FromBool(*(VARIANT_BOOL*)src, d); break;
578 case DBTYPE_DECIMAL: hr = VarUI2FromDec((DECIMAL*)src, d); break;
579 case DBTYPE_I1: hr = VarUI2FromI1(*(signed char*)src, d); break;
580 case DBTYPE_UI1: hr = VarUI2FromUI1(*(BYTE*)src, d); break;
581 case DBTYPE_UI2: *d = *(WORD*)src; hr = S_OK; break;
582 case DBTYPE_UI4: hr = VarUI2FromUI4(*(DWORD*)src, d); break;
583 case DBTYPE_I8: hr = VarUI2FromI8(*(LONGLONG*)src, d); break;
584 case DBTYPE_UI8: hr = VarUI2FromUI8(*(ULONGLONG*)src, d); break;
585 default: FIXME("Unimplemented conversion %04x -> UI2\n", src_type); return E_NOTIMPL;
586 }
587 break;
588 }
589
590 case DBTYPE_UI4:
591 {
592 DWORD *d = dst;
593 switch(src_type)
594 {
595 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
596 case DBTYPE_I2: hr = VarUI4FromI2(*(signed short*)src, d); break;
597 case DBTYPE_I4: hr = VarUI4FromI4(*(signed int*)src, d); break;
598 case DBTYPE_R4: hr = VarUI4FromR4(*(FLOAT*)src, d); break;
599 case DBTYPE_R8: hr = VarUI4FromR8(*(double*)src, d); break;
600 case DBTYPE_CY: hr = VarUI4FromCy(*(CY*)src, d); break;
601 case DBTYPE_DATE: hr = VarUI4FromDate(*(DATE*)src, d); break;
602 case DBTYPE_BSTR: hr = VarUI4FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
603 case DBTYPE_BOOL: hr = VarUI4FromBool(*(VARIANT_BOOL*)src, d); break;
604 case DBTYPE_DECIMAL: hr = VarUI4FromDec((DECIMAL*)src, d); break;
605 case DBTYPE_I1: hr = VarUI4FromI1(*(signed char*)src, d); break;
606 case DBTYPE_UI1: hr = VarUI4FromUI1(*(BYTE*)src, d); break;
607 case DBTYPE_UI2: hr = VarUI4FromUI2(*(WORD*)src, d); break;
608 case DBTYPE_UI4: *d = *(DWORD*)src; hr = S_OK; break;
609 case DBTYPE_I8: hr = VarUI4FromI8(*(LONGLONG*)src, d); break;
610 case DBTYPE_UI8: hr = VarUI4FromUI8(*(ULONGLONG*)src, d); 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_I4:
756 V_VT(v) = VT_I4;
757 V_I4(v) = *(signed int*)src;
758 hr = S_OK;
759 break;
760 case DBTYPE_I8:
761 V_VT(v) = VT_DECIMAL;
762 hr = VarDecFromI8( *(LONGLONG*)src, &V_DECIMAL(v));
763 break;
764 case DBTYPE_R8:
765 V_VT(v) = VT_R8;
766 V_R8(v) = *(double*)src;
767 hr = S_OK;
768 break;
769 case DBTYPE_BSTR:
770 {
771 BSTR s = *(WCHAR**)src;
772 TRACE("%s\n", debugstr_w(s));
773 V_VT(v) = VT_BSTR;
774 V_BSTR(v) = SysAllocString(s);
775 hr = V_BSTR(v) ? S_OK : E_OUTOFMEMORY;
776 break;
777 }
778 case DBTYPE_DATE:
779 V_VT(v) = VT_DATE;
780 V_DATE(v) = *(DATE*)src;
781 hr = S_OK;
782 break;
783 case DBTYPE_CY:
784 V_VT(v) = VT_CY;
785 V_CY(v) = *(CY*)src;
786 hr = S_OK;
787 break;
788 default: FIXME("Unimplemented conversion %04x -> VARIANT\n", src_type); return E_NOTIMPL;
789 }
790 break;
791 }
792
793 default:
794 FIXME("Unimplemented conversion %04x -> %04x\n", src_type, dst_type);
795 return E_NOTIMPL;
796 }
797
798 if(hr == DISP_E_OVERFLOW)
799 {
800 *dst_status = DBSTATUS_E_DATAOVERFLOW;
801 *dst_len = get_length(dst_type);
802 hr = DB_E_ERRORSOCCURRED;
803 }
804 else if(hr == S_OK)
805 {
806 *dst_status = DBSTATUS_S_OK;
807 *dst_len = get_length(dst_type);
808 }
809
810 return hr;
811 }
812
813 static inline WORD get_dbtype_class(DBTYPE type)
814 {
815 switch(type)
816 {
817 case DBTYPE_I2:
818 case DBTYPE_R4:
819 case DBTYPE_R8:
820 case DBTYPE_I1:
821 case DBTYPE_UI1:
822 case DBTYPE_UI2:
823 return DBTYPE_I2;
824
825 case DBTYPE_I4:
826 case DBTYPE_UI4:
827 return DBTYPE_I4;
828
829 case DBTYPE_I8:
830 case DBTYPE_UI8:
831 return DBTYPE_I8;
832
833 case DBTYPE_BSTR:
834 case DBTYPE_STR:
835 case DBTYPE_WSTR:
836 return DBTYPE_BSTR;
837
838 case DBTYPE_DBDATE:
839 case DBTYPE_DBTIME:
840 case DBTYPE_DBTIMESTAMP:
841 return DBTYPE_DBDATE;
842 }
843 return type;
844 }
845
846 /* Many src types will convert to this group of dst types */
847 static inline BOOL common_class(WORD dst_class)
848 {
849 switch(dst_class)
850 {
851 case DBTYPE_EMPTY:
852 case DBTYPE_NULL:
853 case DBTYPE_I2:
854 case DBTYPE_I4:
855 case DBTYPE_BSTR:
856 case DBTYPE_BOOL:
857 case DBTYPE_VARIANT:
858 case DBTYPE_I8:
859 case DBTYPE_CY:
860 case DBTYPE_DECIMAL:
861 case DBTYPE_NUMERIC:
862 return TRUE;
863 }
864 return FALSE;
865 }
866
867 static inline BOOL array_type(DBTYPE type)
868 {
869 return (type >= DBTYPE_I2 && type <= DBTYPE_UI4);
870 }
871
872 static HRESULT WINAPI convert_CanConvert(IDataConvert* iface,
873 DBTYPE src_type, DBTYPE dst_type)
874 {
875 convert *This = impl_from_IDataConvert(iface);
876 DBTYPE src_base_type = src_type & 0x1ff;
877 DBTYPE dst_base_type = dst_type & 0x1ff;
878 WORD dst_class = get_dbtype_class(dst_base_type);
879
880 TRACE("(%p)->(%d, %d)\n", This, src_type, dst_type);
881
882 if(src_type & DBTYPE_VECTOR || dst_type & DBTYPE_VECTOR) return S_FALSE;
883
884 if(src_type & DBTYPE_ARRAY)
885 {
886 if(!array_type(src_base_type)) return S_FALSE;
887 if(dst_type & DBTYPE_ARRAY)
888 {
889 if(src_type == dst_type) return S_OK;
890 return S_FALSE;
891 }
892 if(dst_type == DBTYPE_VARIANT) return S_OK;
893 return S_FALSE;
894 }
895
896 if(dst_type & DBTYPE_ARRAY)
897 {
898 if(!array_type(dst_base_type)) return S_FALSE;
899 if(src_type == DBTYPE_IDISPATCH || src_type == DBTYPE_VARIANT) return S_OK;
900 return S_FALSE;
901 }
902
903 if(dst_type & DBTYPE_BYREF)
904 if(dst_base_type != DBTYPE_BYTES && dst_base_type != DBTYPE_STR && dst_base_type != DBTYPE_WSTR)
905 return S_FALSE;
906
907 switch(get_dbtype_class(src_base_type))
908 {
909 case DBTYPE_EMPTY:
910 if(common_class(dst_class)) return S_OK;
911 switch(dst_class)
912 {
913 case DBTYPE_DATE:
914 case DBTYPE_GUID:
915 case DBTYPE_FILETIME:
916 return S_OK;
917 default:
918 if(dst_base_type == DBTYPE_DBTIMESTAMP) return S_OK;
919 return S_FALSE;
920 }
921
922 case DBTYPE_NULL:
923 switch(dst_base_type)
924 {
925 case DBTYPE_NULL:
926 case DBTYPE_VARIANT:
927 case DBTYPE_FILETIME: return S_OK;
928 default: return S_FALSE;
929 }
930
931 case DBTYPE_I4:
932 if(dst_base_type == DBTYPE_BYTES) return S_OK;
933 /* fall through */
934 case DBTYPE_I2:
935 if(dst_base_type == DBTYPE_DATE) return S_OK;
936 /* fall through */
937 case DBTYPE_DECIMAL:
938 if(common_class(dst_class)) return S_OK;
939 if(dst_class == DBTYPE_DBDATE) return S_OK;
940 return S_FALSE;
941
942 case DBTYPE_BOOL:
943 if(dst_base_type == DBTYPE_DATE) return S_OK;
944 /* fall through */
945 case DBTYPE_NUMERIC:
946 case DBTYPE_CY:
947 if(common_class(dst_class)) return S_OK;
948 return S_FALSE;
949
950 case DBTYPE_I8:
951 if(common_class(dst_class)) return S_OK;
952 switch(dst_base_type)
953 {
954 case DBTYPE_BYTES:
955 case DBTYPE_FILETIME: return S_OK;
956 default: return S_FALSE;
957 }
958
959 case DBTYPE_DATE:
960 switch(dst_class)
961 {
962 case DBTYPE_EMPTY:
963 case DBTYPE_NULL:
964 case DBTYPE_I2:
965 case DBTYPE_I4:
966 case DBTYPE_BSTR:
967 case DBTYPE_BOOL:
968 case DBTYPE_VARIANT:
969 case DBTYPE_I8:
970 case DBTYPE_DATE:
971 case DBTYPE_DBDATE:
972 case DBTYPE_FILETIME:
973 return S_OK;
974 default: return S_FALSE;
975 }
976
977 case DBTYPE_IDISPATCH:
978 case DBTYPE_VARIANT:
979 switch(dst_base_type)
980 {
981 case DBTYPE_IDISPATCH:
982 case DBTYPE_ERROR:
983 case DBTYPE_IUNKNOWN:
984 return S_OK;
985 }
986 /* fall through */
987 case DBTYPE_BSTR:
988 if(common_class(dst_class)) return S_OK;
989 switch(dst_class)
990 {
991 case DBTYPE_DATE:
992 case DBTYPE_GUID:
993 case DBTYPE_BYTES:
994 case DBTYPE_DBDATE:
995 case DBTYPE_FILETIME:
996 return S_OK;
997 default: return S_FALSE;
998 }
999
1000 case DBTYPE_ERROR:
1001 switch(dst_base_type)
1002 {
1003 case DBTYPE_BSTR:
1004 case DBTYPE_ERROR:
1005 case DBTYPE_VARIANT:
1006 case DBTYPE_WSTR:
1007 return S_OK;
1008 default: return S_FALSE;
1009 }
1010
1011 case DBTYPE_IUNKNOWN:
1012 switch(dst_base_type)
1013 {
1014 case DBTYPE_EMPTY:
1015 case DBTYPE_NULL:
1016 case DBTYPE_IDISPATCH:
1017 case DBTYPE_VARIANT:
1018 case DBTYPE_IUNKNOWN:
1019 return S_OK;
1020 default: return S_FALSE;
1021 }
1022
1023 case DBTYPE_BYTES:
1024 if(dst_class == DBTYPE_I4 || dst_class == DBTYPE_I8) return S_OK;
1025 /* fall through */
1026 case DBTYPE_GUID:
1027 switch(dst_class)
1028 {
1029 case DBTYPE_EMPTY:
1030 case DBTYPE_NULL:
1031 case DBTYPE_BSTR:
1032 case DBTYPE_VARIANT:
1033 case DBTYPE_GUID:
1034 case DBTYPE_BYTES:
1035 return S_OK;
1036 default: return S_FALSE;
1037 }
1038
1039 case DBTYPE_FILETIME:
1040 if(dst_class == DBTYPE_I8) return S_OK;
1041 /* fall through */
1042 case DBTYPE_DBDATE:
1043 switch(dst_class)
1044 {
1045 case DBTYPE_EMPTY:
1046 case DBTYPE_NULL:
1047 case DBTYPE_DATE:
1048 case DBTYPE_BSTR:
1049 case DBTYPE_VARIANT:
1050 case DBTYPE_DBDATE:
1051 case DBTYPE_FILETIME:
1052 return S_OK;
1053 default: return S_FALSE;
1054 }
1055
1056 }
1057 return S_FALSE;
1058 }
1059
1060 static HRESULT WINAPI convert_GetConversionSize(IDataConvert* iface,
1061 DBTYPE src_type, DBTYPE dst_type,
1062 DBLENGTH *src_len, DBLENGTH *dst_len,
1063 void *src)
1064 {
1065 convert *This = impl_from_IDataConvert(iface);
1066 HRESULT hr;
1067
1068 TRACE("(%p)->(%d, %d, %p, %p, %p)\n", This, src_type, dst_type, src_len, dst_len, src);
1069
1070 hr = IDataConvert_CanConvert(iface, src_type, dst_type);
1071 if (hr != S_OK)
1072 return DB_E_UNSUPPORTEDCONVERSION;
1073
1074 if (!dst_len)
1075 return E_INVALIDARG;
1076
1077 /* for some types we don't need to look into source data */
1078 if ((*dst_len = get_length(dst_type)))
1079 return S_OK;
1080
1081 switch (dst_type)
1082 {
1083 case DBTYPE_STR:
1084 {
1085 switch (src_type)
1086 {
1087 case DBTYPE_VARIANT:
1088 {
1089 VARIANT v;
1090
1091 VariantInit(&v);
1092 if ((hr = VariantChangeType(&v, (VARIANT*)src, 0, VT_BSTR)) == S_OK)
1093 {
1094 *dst_len = WideCharToMultiByte(CP_ACP, 0, V_BSTR(&v), -1, NULL, 0, NULL, NULL);
1095 VariantClear(&v);
1096 }
1097 else
1098 return hr;
1099 }
1100 break;
1101 default:
1102 FIXME("unimplemented for %04x -> DBTYPE_STR\n", src_type);
1103 return E_NOTIMPL;
1104 }
1105 }
1106 break;
1107 case DBTYPE_WSTR:
1108 {
1109 switch (src_type)
1110 {
1111 case DBTYPE_STR:
1112 if(src_len)
1113 *dst_len = (*src_len + 1) * sizeof(WCHAR);
1114 else
1115 *dst_len = (strlen(src) + 1) * sizeof(WCHAR);
1116 break;
1117 case DBTYPE_WSTR:
1118 if(src_len)
1119 *dst_len = (*src_len) + sizeof(WCHAR);
1120 else
1121 *dst_len = (lstrlenW(src) + 1) * sizeof(WCHAR);
1122 break;
1123 default:
1124 FIXME("unimplemented for %04x -> DBTYPE_WSTR\n", src_type);
1125 return E_NOTIMPL;
1126 }
1127 }
1128 break;
1129 default:
1130 FIXME("unimplemented for conversion %d->%d\n", src_type, dst_type);
1131 return E_NOTIMPL;
1132 }
1133
1134 return S_OK;
1135 }
1136
1137 static const struct IDataConvertVtbl convert_vtbl =
1138 {
1139 convert_QueryInterface,
1140 convert_AddRef,
1141 convert_Release,
1142 convert_DataConvert,
1143 convert_CanConvert,
1144 convert_GetConversionSize
1145 };
1146
1147 static HRESULT WINAPI dcinfo_QueryInterface(IDCInfo* iface, REFIID riid, void **obj)
1148 {
1149 convert *This = impl_from_IDCInfo(iface);
1150
1151 return IDataConvert_QueryInterface(&This->IDataConvert_iface, riid, obj);
1152 }
1153
1154 static ULONG WINAPI dcinfo_AddRef(IDCInfo* iface)
1155 {
1156 convert *This = impl_from_IDCInfo(iface);
1157
1158 return IDataConvert_AddRef(&This->IDataConvert_iface);
1159 }
1160
1161 static ULONG WINAPI dcinfo_Release(IDCInfo* iface)
1162 {
1163 convert *This = impl_from_IDCInfo(iface);
1164
1165 return IDataConvert_Release(&This->IDataConvert_iface);
1166 }
1167
1168 static HRESULT WINAPI dcinfo_GetInfo(IDCInfo *iface, ULONG num, DCINFOTYPE types[], DCINFO **info_ptr)
1169 {
1170 convert *This = impl_from_IDCInfo(iface);
1171 ULONG i;
1172 DCINFO *infos;
1173
1174 TRACE("(%p)->(%d, %p, %p)\n", This, num, types, info_ptr);
1175
1176 *info_ptr = infos = CoTaskMemAlloc(num * sizeof(*infos));
1177 if(!infos) return E_OUTOFMEMORY;
1178
1179 for(i = 0; i < num; i++)
1180 {
1181 infos[i].eInfoType = types[i];
1182 VariantInit(&infos[i].vData);
1183
1184 switch(types[i])
1185 {
1186 case DCINFOTYPE_VERSION:
1187 V_VT(&infos[i].vData) = VT_UI4;
1188 V_UI4(&infos[i].vData) = This->version;
1189 break;
1190 }
1191 }
1192
1193 return S_OK;
1194 }
1195
1196 static HRESULT WINAPI dcinfo_SetInfo(IDCInfo* iface, ULONG num, DCINFO info[])
1197 {
1198 convert *This = impl_from_IDCInfo(iface);
1199 ULONG i;
1200 HRESULT hr = S_OK;
1201
1202 TRACE("(%p)->(%d, %p)\n", This, num, info);
1203
1204 for(i = 0; i < num; i++)
1205 {
1206 switch(info[i].eInfoType)
1207 {
1208 case DCINFOTYPE_VERSION:
1209 if(V_VT(&info[i].vData) != VT_UI4)
1210 {
1211 FIXME("VERSION with vt %x\n", V_VT(&info[i].vData));
1212 hr = DB_S_ERRORSOCCURRED;
1213 break;
1214 }
1215 This->version = V_UI4(&info[i].vData);
1216 break;
1217
1218 default:
1219 FIXME("Unhandled info type %d (vt %x)\n", info[i].eInfoType, V_VT(&info[i].vData));
1220 }
1221 }
1222 return hr;
1223 }
1224
1225 static const struct IDCInfoVtbl dcinfo_vtbl =
1226 {
1227 dcinfo_QueryInterface,
1228 dcinfo_AddRef,
1229 dcinfo_Release,
1230 dcinfo_GetInfo,
1231 dcinfo_SetInfo
1232 };
1233
1234 HRESULT create_oledb_convert(IUnknown *outer, void **obj)
1235 {
1236 convert *This;
1237
1238 TRACE("(%p, %p)\n", outer, obj);
1239
1240 *obj = NULL;
1241
1242 if(outer) return CLASS_E_NOAGGREGATION;
1243
1244 This = HeapAlloc(GetProcessHeap(), 0, sizeof(*This));
1245 if(!This) return E_OUTOFMEMORY;
1246
1247 This->IDataConvert_iface.lpVtbl = &convert_vtbl;
1248 This->IDCInfo_iface.lpVtbl = &dcinfo_vtbl;
1249 This->ref = 1;
1250 This->version = 0x110;
1251
1252 *obj = &This->IDataConvert_iface;
1253
1254 return S_OK;
1255 }
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