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oledb32: Support VT_NULL when converting to DBTYPE_BSTR.
[wine/multimedia.git] / dlls / oledb32 / convert.c
blobaf603e417c63ce0fd0065f682771235c6df7ef03
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_DBDATE:
135 return sizeof(DBDATE);
136 case DBTYPE_DBTIMESTAMP:
137 return sizeof(DBTIMESTAMP);
138 case DBTYPE_CY:
139 return sizeof(CY);
140 case DBTYPE_BSTR:
141 return sizeof(BSTR);
142 case DBTYPE_FILETIME:
143 return sizeof(FILETIME);
144 case DBTYPE_GUID:
145 return sizeof(GUID);
146 case DBTYPE_WSTR:
147 case DBTYPE_STR:
148 case DBTYPE_BYREF | DBTYPE_WSTR:
149 return 0;
150 case DBTYPE_VARIANT:
151 return sizeof(VARIANT);
152 default:
153 FIXME("Unhandled type %04x\n", type);
154 return 0;
155 }
156 }
157
158 static HRESULT WINAPI convert_DataConvert(IDataConvert* iface,
159 DBTYPE src_type, DBTYPE dst_type,
160 DBLENGTH src_len, DBLENGTH *dst_len,
161 void *src, void *dst,
162 DBLENGTH dst_max_len,
163 DBSTATUS src_status, DBSTATUS *dst_status,
164 BYTE precision, BYTE scale,
165 DBDATACONVERT flags)
166 {
167 convert *This = impl_from_IDataConvert(iface);
168 DBLENGTH dst_len_loc;
169 DBSTATUS dst_status_loc;
170 VARIANT tmp;
171 HRESULT hr;
172
173 TRACE("(%p)->(%d, %d, %ld, %p, %p, %p, %ld, %d, %p, %d, %d, %x)\n", This,
174 src_type, dst_type, src_len, dst_len, src, dst, dst_max_len,
175 src_status, dst_status, precision, scale, flags);
176
177 if (!dst_len) dst_len = &dst_len_loc;
178 if (!dst_status) dst_status = &dst_status_loc;
179
180 *dst_status = DBSTATUS_E_BADACCESSOR;
181
182 if(IDataConvert_CanConvert(iface, src_type, dst_type) != S_OK)
183 {
184 return DB_E_UNSUPPORTEDCONVERSION;
185 }
186
187 if(src_type == DBTYPE_STR)
188 {
189 BSTR b;
190 DWORD len;
191
192 if(flags & DBDATACONVERT_LENGTHFROMNTS)
193 len = MultiByteToWideChar(CP_ACP, 0, src, -1, NULL, 0) - 1;
194 else
195 len = MultiByteToWideChar(CP_ACP, 0, src, src_len, NULL, 0);
196 b = SysAllocStringLen(NULL, len);
197 if(!b) return E_OUTOFMEMORY;
198 if(flags & DBDATACONVERT_LENGTHFROMNTS)
199 MultiByteToWideChar(CP_ACP, 0, src, -1, b, len + 1);
200 else
201 MultiByteToWideChar(CP_ACP, 0, src, src_len, b, len);
202
203 hr = IDataConvert_DataConvert(iface, DBTYPE_BSTR, dst_type, 0, dst_len,
204 &b, dst, dst_max_len, src_status, dst_status,
205 precision, scale, flags);
206
207 SysFreeString(b);
208 return hr;
209 }
210
211 if(src_type == DBTYPE_WSTR)
212 {
213 BSTR b;
214
215 if(flags & DBDATACONVERT_LENGTHFROMNTS)
216 b = SysAllocString(src);
217 else
218 b = SysAllocStringLen(src, src_len / 2);
219 if(!b) return E_OUTOFMEMORY;
220 hr = IDataConvert_DataConvert(iface, DBTYPE_BSTR, dst_type, 0, dst_len,
221 &b, dst, dst_max_len, src_status, dst_status,
222 precision, scale, flags);
223 SysFreeString(b);
224 return hr;
225 }
226
227 switch(dst_type)
228 {
229 case DBTYPE_I2:
230 {
231 signed short *d = dst;
232 switch(src_type)
233 {
234 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
235 case DBTYPE_I2: *d = *(signed short*)src; hr = S_OK; break;
236 case DBTYPE_I4: hr = VarI2FromI4(*(signed int*)src, d); break;
237 case DBTYPE_R4: hr = VarI2FromR4(*(FLOAT*)src, d); break;
238 case DBTYPE_R8: hr = VarI2FromR8(*(double*)src, d); break;
239 case DBTYPE_CY: hr = VarI2FromCy(*(CY*)src, d); break;
240 case DBTYPE_DATE: hr = VarI2FromDate(*(DATE*)src, d); break;
241 case DBTYPE_BSTR: hr = VarI2FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
242 case DBTYPE_BOOL: hr = VarI2FromBool(*(VARIANT_BOOL*)src, d); break;
243 case DBTYPE_DECIMAL: hr = VarI2FromDec((DECIMAL*)src, d); break;
244 case DBTYPE_I1: hr = VarI2FromI1(*(signed char*)src, d); break;
245 case DBTYPE_UI1: hr = VarI2FromUI1(*(BYTE*)src, d); break;
246 case DBTYPE_UI2: hr = VarI2FromUI2(*(WORD*)src, d); break;
247 case DBTYPE_UI4: hr = VarI2FromUI4(*(DWORD*)src, d); break;
248 case DBTYPE_I8: hr = VarI2FromI8(*(LONGLONG*)src, d); break;
249 case DBTYPE_UI8: hr = VarI2FromUI8(*(ULONGLONG*)src, d); break;
250 case DBTYPE_VARIANT:
251 VariantInit(&tmp);
252 if ((hr = VariantChangeType(&tmp, (VARIANT*)src, 0, VT_I2)) == S_OK)
253 *d = V_I2(&tmp);
254 break;
255 default: FIXME("Unimplemented conversion %04x -> I2\n", src_type); return E_NOTIMPL;
256 }
257 break;
258 }
259
260 case DBTYPE_I4:
261 {
262 signed int *d = dst;
263 switch(src_type)
264 {
265 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
266 case DBTYPE_I2: hr = VarI4FromI2(*(signed short*)src, d); break;
267 case DBTYPE_I4: *d = *(signed int*)src; hr = S_OK; break;
268 case DBTYPE_R4: hr = VarI4FromR4(*(FLOAT*)src, d); break;
269 case DBTYPE_R8: hr = VarI4FromR8(*(double*)src, d); break;
270 case DBTYPE_CY: hr = VarI4FromCy(*(CY*)src, d); break;
271 case DBTYPE_DATE: hr = VarI4FromDate(*(DATE*)src, d); break;
272 case DBTYPE_BSTR: hr = VarI4FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
273 case DBTYPE_BOOL: hr = VarI4FromBool(*(VARIANT_BOOL*)src, d); break;
274 case DBTYPE_DECIMAL: hr = VarI4FromDec((DECIMAL*)src, d); break;
275 case DBTYPE_I1: hr = VarI4FromI1(*(signed char*)src, d); break;
276 case DBTYPE_UI1: hr = VarI4FromUI1(*(BYTE*)src, d); break;
277 case DBTYPE_UI2: hr = VarI4FromUI2(*(WORD*)src, d); break;
278 case DBTYPE_UI4: hr = VarI4FromUI4(*(DWORD*)src, d); break;
279 case DBTYPE_I8: hr = VarI4FromI8(*(LONGLONG*)src, d); break;
280 case DBTYPE_UI8: hr = VarI4FromUI8(*(ULONGLONG*)src, d); break;
281 case DBTYPE_VARIANT:
282 VariantInit(&tmp);
283 if ((hr = VariantChangeType(&tmp, (VARIANT*)src, 0, VT_I4)) == S_OK)
284 *d = V_I4(&tmp);
285 break;
286 default: FIXME("Unimplemented conversion %04x -> I4\n", src_type); return E_NOTIMPL;
287 }
288 break;
289 }
290
291 case DBTYPE_I8:
292 {
293 LONGLONG *d = dst;
294 switch(src_type)
295 {
296 case DBTYPE_BSTR: hr = VarI8FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
297 case DBTYPE_I8: *d = *(LONGLONG*)src; hr = S_OK; break;
298 default: FIXME("Unimplemented conversion %04x -> I8\n", src_type); return E_NOTIMPL;
299 }
300 break;
301 }
302
303 case DBTYPE_R4:
304 {
305 FLOAT *d = dst;
306 switch(src_type)
307 {
308 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
309 case DBTYPE_I2: hr = VarR4FromI2(*(signed short*)src, d); break;
310 case DBTYPE_I4: hr = VarR4FromI4(*(signed int*)src, d); break;
311 case DBTYPE_R4: *d = *(FLOAT*)src; hr = S_OK; break;
312 case DBTYPE_R8: hr = VarR4FromR8(*(double*)src, d); break;
313 case DBTYPE_CY: hr = VarR4FromCy(*(CY*)src, d); break;
314 case DBTYPE_DATE: hr = VarR4FromDate(*(DATE*)src, d); break;
315 case DBTYPE_BSTR: hr = VarR4FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
316 case DBTYPE_BOOL: hr = VarR4FromBool(*(VARIANT_BOOL*)src, d); break;
317 case DBTYPE_DECIMAL: hr = VarR4FromDec((DECIMAL*)src, d); break;
318 case DBTYPE_I1: hr = VarR4FromI1(*(signed char*)src, d); break;
319 case DBTYPE_UI1: hr = VarR4FromUI1(*(BYTE*)src, d); break;
320 case DBTYPE_UI2: hr = VarR4FromUI2(*(WORD*)src, d); break;
321 case DBTYPE_UI4: hr = VarR4FromUI4(*(DWORD*)src, d); break;
322 case DBTYPE_I8: hr = VarR4FromI8(*(LONGLONG*)src, d); break;
323 case DBTYPE_UI8: hr = VarR4FromUI8(*(ULONGLONG*)src, d); break;
324 default: FIXME("Unimplemented conversion %04x -> R4\n", src_type); return E_NOTIMPL;
325 }
326 break;
327 }
328 case DBTYPE_R8:
329 {
330 DOUBLE *d=dst;
331 switch (src_type)
332 {
333 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
334 case DBTYPE_I1: hr = VarR8FromI1(*(signed char*)src, d); break;
335 case DBTYPE_I2: hr = VarR8FromI2(*(signed short*)src, d); break;
336 case DBTYPE_I4: hr = VarR8FromI4(*(signed int*)src, d); break;
337 case DBTYPE_I8: hr = VarR8FromI8(*(LONGLONG*)src, d); break;
338 case DBTYPE_UI1: hr = VarR8FromUI1(*(BYTE*)src, d); break;
339 case DBTYPE_UI2: hr = VarR8FromUI2(*(WORD*)src, d); break;
340 case DBTYPE_UI4: hr = VarR8FromUI4(*(DWORD*)src, d); break;
341 case DBTYPE_UI8: hr = VarR8FromUI8(*(ULONGLONG*)src, d); break;
342 case DBTYPE_R4: hr = VarR8FromR4(*(FLOAT*)src, d); break;
343 case DBTYPE_R8: *d = *(DOUBLE*)src; hr = S_OK; break;
344 case DBTYPE_CY: hr = VarR8FromCy(*(CY*)src, d); break;
345 case DBTYPE_DATE: hr = VarR8FromDate(*(DATE*)src, d); break;
346 case DBTYPE_BSTR: hr = VarR8FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
347 case DBTYPE_BOOL: hr = VarR8FromBool(*(VARIANT_BOOL*)src, d); break;
348 case DBTYPE_DECIMAL: hr = VarR8FromDec((DECIMAL*)src, d); break;
349 default: FIXME("Unimplemented conversion %04x -> R8\n", src_type); return E_NOTIMPL;
350 }
351 break;
352 }
353 case DBTYPE_BOOL:
354 {
355 VARIANT_BOOL *d=dst;
356 switch (src_type)
357 {
358 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
359 case DBTYPE_I1: hr = VarBoolFromI1(*(signed char*)src, d); break;
360 case DBTYPE_I2: hr = VarBoolFromI2(*(signed short*)src, d); break;
361 case DBTYPE_I4: hr = VarBoolFromI4(*(signed int*)src, d); break;
362 case DBTYPE_I8: hr = VarBoolFromI8(*(LONGLONG*)src, d); break;
363 case DBTYPE_UI1: hr = VarBoolFromUI1(*(BYTE*)src, d); break;
364 case DBTYPE_UI2: hr = VarBoolFromUI2(*(WORD*)src, d); break;
365 case DBTYPE_UI4: hr = VarBoolFromUI4(*(DWORD*)src, d); break;
366 case DBTYPE_UI8: hr = VarBoolFromUI8(*(ULONGLONG*)src, d); break;
367 case DBTYPE_R4: hr = VarBoolFromR4(*(FLOAT*)src, d); break;
368 case DBTYPE_R8: hr = VarBoolFromR8(*(DOUBLE*)src, d); break;
369 case DBTYPE_CY: hr = VarBoolFromCy(*(CY*)src, d); break;
370 case DBTYPE_DATE: hr = VarBoolFromDate(*(DATE*)src, d); break;
371 case DBTYPE_BSTR: hr = VarBoolFromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
372 case DBTYPE_BOOL: *d = *(VARIANT_BOOL*)src; hr = S_OK; break;
373 case DBTYPE_DECIMAL: hr = VarBoolFromDec((DECIMAL*)src, d); break;
374 default: FIXME("Unimplemented conversion %04x -> BOOL\n", src_type); return E_NOTIMPL;
375 }
376 break;
377 }
378 case DBTYPE_DATE:
379 {
380 DATE *d=dst;
381 switch (src_type)
382 {
383 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
384 case DBTYPE_I1: hr = VarDateFromI1(*(signed char*)src, d); break;
385 case DBTYPE_I2: hr = VarDateFromI2(*(signed short*)src, d); break;
386 case DBTYPE_I4: hr = VarDateFromI4(*(signed int*)src, d); break;
387 case DBTYPE_I8: hr = VarDateFromI8(*(LONGLONG*)src, d); break;
388 case DBTYPE_UI1: hr = VarDateFromUI1(*(BYTE*)src, d); break;
389 case DBTYPE_UI2: hr = VarDateFromUI2(*(WORD*)src, d); break;
390 case DBTYPE_UI4: hr = VarDateFromUI4(*(DWORD*)src, d); break;
391 case DBTYPE_UI8: hr = VarDateFromUI8(*(ULONGLONG*)src, d); break;
392 case DBTYPE_R4: hr = VarDateFromR4(*(FLOAT*)src, d); break;
393 case DBTYPE_R8: hr = VarDateFromR8(*(DOUBLE*)src, d); break;
394 case DBTYPE_CY: hr = VarDateFromCy(*(CY*)src, d); break;
395 case DBTYPE_DATE: *d = *(DATE*)src; hr = S_OK; break;
396 case DBTYPE_BSTR: hr = VarDateFromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
397 case DBTYPE_BOOL: hr = VarDateFromBool(*(VARIANT_BOOL*)src, d); break;
398 case DBTYPE_DECIMAL: hr = VarDateFromDec((DECIMAL*)src, d); break;
399 case DBTYPE_DBTIMESTAMP:
400 {
401 SYSTEMTIME st;
402 DBTIMESTAMP *ts=(DBTIMESTAMP*)src;
403
404 st.wYear = ts->year;
405 st.wMonth = ts->month;
406 st.wDay = ts->day;
407 st.wHour = ts->hour;
408 st.wMinute = ts->minute;
409 st.wSecond = ts->second;
410 st.wMilliseconds = ts->fraction/1000000;
411 hr = (SystemTimeToVariantTime(&st, d) ? S_OK : E_FAIL);
412 break;
413 }
414 default: FIXME("Unimplemented conversion %04x -> DATE\n", src_type); return E_NOTIMPL;
415 }
416 break;
417 }
418 case DBTYPE_DBDATE:
419 {
420 DBDATE *d=dst;
421 switch (src_type)
422 {
423 case DBTYPE_DBDATE: memcpy(d, src, sizeof(DBDATE)); hr = S_OK; break;
424 default: FIXME("Unimplemented conversion %04x -> DBDATE\n", src_type); return E_NOTIMPL;
425 }
426 break;
427 }
428 case DBTYPE_DBTIMESTAMP:
429 {
430 DBTIMESTAMP *d=dst;
431 switch (src_type)
432 {
433 case DBTYPE_EMPTY: memset(d, 0, sizeof(DBTIMESTAMP)); hr = S_OK; break;
434 case DBTYPE_DBTIMESTAMP: memcpy(d, src, sizeof(DBTIMESTAMP)); hr = S_OK; break;
435 case DBTYPE_DATE:
436 {
437 SYSTEMTIME st;
438 hr = (VariantTimeToSystemTime(*(double*)src, &st) ? S_OK : E_FAIL);
439 d->year = st.wYear;
440 d->month = st.wMonth;
441 d->day = st.wDay;
442 d->hour = st.wHour;
443 d->minute = st.wMinute;
444 d->second = st.wSecond;
445 d->fraction = st.wMilliseconds * 1000000;
446 break;
447 }
448 default: FIXME("Unimplemented conversion %04x -> DBTIMESTAMP\n", src_type); return E_NOTIMPL;
449 }
450 break;
451 }
452
453 case DBTYPE_CY:
454 {
455 CY *d = dst;
456 switch(src_type)
457 {
458 case DBTYPE_EMPTY: d->int64 = 0; hr = S_OK; break;
459 case DBTYPE_I2: hr = VarCyFromI2(*(signed short*)src, d); break;
460 case DBTYPE_I4: hr = VarCyFromI4(*(signed int*)src, d); break;
461 case DBTYPE_R4: hr = VarCyFromR4(*(FLOAT*)src, d); break;
462 case DBTYPE_R8: hr = VarCyFromR8(*(double*)src, d); break;
463 case DBTYPE_CY: *d = *(CY*)src; hr = S_OK; break;
464 case DBTYPE_DATE: hr = VarCyFromDate(*(DATE*)src, d); break;
465 case DBTYPE_BSTR: hr = VarCyFromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
466 case DBTYPE_BOOL: hr = VarCyFromBool(*(VARIANT_BOOL*)src, d); break;
467 case DBTYPE_DECIMAL: hr = VarCyFromDec((DECIMAL*)src, d); break;
468 case DBTYPE_I1: hr = VarCyFromI1(*(signed char*)src, d); break;
469 case DBTYPE_UI1: hr = VarCyFromUI1(*(BYTE*)src, d); break;
470 case DBTYPE_UI2: hr = VarCyFromUI2(*(WORD*)src, d); break;
471 case DBTYPE_UI4: hr = VarCyFromUI4(*(DWORD*)src, d); break;
472 case DBTYPE_I8: hr = VarCyFromI8(*(LONGLONG*)src, d); break;
473 case DBTYPE_UI8: hr = VarCyFromUI8(*(ULONGLONG*)src, d); break;
474 default: FIXME("Unimplemented conversion %04x -> CY\n", src_type); return E_NOTIMPL;
475 }
476 break;
477 }
478
479 case DBTYPE_BSTR:
480 {
481 BSTR *d = dst;
482 switch(src_type)
483 {
484 case DBTYPE_EMPTY: *d = SysAllocStringLen(NULL, 0); hr = *d ? S_OK : E_OUTOFMEMORY; break;
485 case DBTYPE_I2: hr = VarBstrFromI2(*(signed short*)src, LOCALE_USER_DEFAULT, 0, d); break;
486 case DBTYPE_I4: hr = VarBstrFromI4(*(signed int*)src, LOCALE_USER_DEFAULT, 0, d); break;
487 case DBTYPE_R4: hr = VarBstrFromR4(*(FLOAT*)src, LOCALE_USER_DEFAULT, 0, d); break;
488 case DBTYPE_R8: hr = VarBstrFromR8(*(double*)src, LOCALE_USER_DEFAULT, 0, d); break;
489 case DBTYPE_CY: hr = VarBstrFromCy(*(CY*)src, LOCALE_USER_DEFAULT, 0, d); break;
490 case DBTYPE_DATE: hr = VarBstrFromDate(*(DATE*)src, LOCALE_USER_DEFAULT, 0, d); break;
491 case DBTYPE_BSTR: *d = SysAllocStringLen(*(BSTR*)src, SysStringLen(*(BSTR*)src)); hr = *d ? S_OK : E_OUTOFMEMORY; break;
492 case DBTYPE_BOOL: hr = VarBstrFromBool(*(VARIANT_BOOL*)src, LOCALE_USER_DEFAULT, 0, d); break;
493 case DBTYPE_DECIMAL: hr = VarBstrFromDec((DECIMAL*)src, LOCALE_USER_DEFAULT, 0, d); break;
494 case DBTYPE_I1: hr = VarBstrFromI1(*(signed char*)src, LOCALE_USER_DEFAULT, 0, d); break;
495 case DBTYPE_UI1: hr = VarBstrFromUI1(*(BYTE*)src, LOCALE_USER_DEFAULT, 0, d); break;
496 case DBTYPE_UI2: hr = VarBstrFromUI2(*(WORD*)src, LOCALE_USER_DEFAULT, 0, d); break;
497 case DBTYPE_UI4: hr = VarBstrFromUI4(*(DWORD*)src, LOCALE_USER_DEFAULT, 0, d); break;
498 case DBTYPE_I8: hr = VarBstrFromI8(*(LONGLONG*)src, LOCALE_USER_DEFAULT, 0, d); break;
499 case DBTYPE_UI8: hr = VarBstrFromUI8(*(ULONGLONG*)src, LOCALE_USER_DEFAULT, 0, d); break;
500 case DBTYPE_GUID:
501 {
502 WCHAR szBuff[39];
503 const GUID *id = (const GUID *)src;
504 WCHAR format[] = {
505 '{','%','0','8','X','-','%','0','4','X','-','%','0','4','X','-',
506 '%','0','2','X','%','0','2','X','-',
507 '%','0','2','X','%','0','2','X','%','0','2','X','%','0','2','X','%','0','2','X','%','0','2','X','}',0};
508 wsprintfW(szBuff, format,
509 id->Data1, id->Data2, id->Data3,
510 id->Data4[0], id->Data4[1], id->Data4[2], id->Data4[3],
511 id->Data4[4], id->Data4[5], id->Data4[6], id->Data4[7] );
512 *d = SysAllocString(szBuff);
513 hr = *d ? S_OK : E_OUTOFMEMORY;
514 }
515 break;
516 case DBTYPE_BYTES:
517 {
518 *d = SysAllocStringLen(NULL, 2 * src_len);
519 if (*d == NULL)
520 hr = E_OUTOFMEMORY;
521 else
522 {
523 const char hexchars[] = "0123456789ABCDEF";
524 WCHAR *s = *d;
525 unsigned char *p = src;
526 while (src_len > 0)
527 {
528 *s++ = hexchars[(*p >> 4) & 0x0F];
529 *s++ = hexchars[(*p) & 0x0F];
530 src_len--; p++;
531 }
532 hr = S_OK;
533 }
534 }
535 break;
536 case DBTYPE_VARIANT:
537 if(V_VT((VARIANT*)src) == VT_NULL)
538 {
539 *dst_status = DBSTATUS_S_ISNULL;
540 *dst_len = get_length(DBTYPE_BSTR);
541 return S_OK;
542 }
543 else
544 {
545 VariantInit(&tmp);
546 if ((hr = VariantChangeType(&tmp, (VARIANT*)src, 0, VT_BSTR)) == S_OK)
547 *d = V_BSTR(&tmp);
548 }
549 break;
550 default: FIXME("Unimplemented conversion %04x -> BSTR\n", src_type); return E_NOTIMPL;
551 }
552 break;
553 }
554
555 case DBTYPE_UI1:
556 {
557 BYTE *d = dst;
558 switch(src_type)
559 {
560 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
561 case DBTYPE_I2: hr = VarUI1FromI2(*(signed short*)src, d); break;
562 case DBTYPE_I4: hr = VarUI1FromI4(*(signed int*)src, d); break;
563 case DBTYPE_R4: hr = VarUI1FromR4(*(FLOAT*)src, d); break;
564 case DBTYPE_R8: hr = VarUI1FromR8(*(double*)src, d); break;
565 case DBTYPE_CY: hr = VarUI1FromCy(*(CY*)src, d); break;
566 case DBTYPE_DATE: hr = VarUI1FromDate(*(DATE*)src, d); break;
567 case DBTYPE_BSTR: hr = VarUI1FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
568 case DBTYPE_BOOL: hr = VarUI1FromBool(*(VARIANT_BOOL*)src, d); break;
569 case DBTYPE_DECIMAL: hr = VarUI1FromDec((DECIMAL*)src, d); break;
570 case DBTYPE_I1: hr = VarUI1FromI1(*(signed char*)src, d); break;
571 case DBTYPE_UI1: *d = *(BYTE*)src; hr = S_OK; break;
572 case DBTYPE_UI2: hr = VarUI1FromUI2(*(WORD*)src, d); break;
573 case DBTYPE_UI4: hr = VarUI1FromUI4(*(DWORD*)src, d); break;
574 case DBTYPE_I8: hr = VarUI1FromI8(*(LONGLONG*)src, d); break;
575 case DBTYPE_UI8: hr = VarUI1FromUI8(*(ULONGLONG*)src, d); break;
576 default: FIXME("Unimplemented conversion %04x -> UI1\n", src_type); return E_NOTIMPL;
577 }
578 break;
579 }
580 case DBTYPE_UI2:
581 {
582 WORD *d = dst;
583 switch(src_type)
584 {
585 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
586 case DBTYPE_I2: hr = VarUI2FromI2(*(signed short*)src, d); break;
587 case DBTYPE_I4: hr = VarUI2FromI4(*(signed int*)src, d); break;
588 case DBTYPE_R4: hr = VarUI2FromR4(*(FLOAT*)src, d); break;
589 case DBTYPE_R8: hr = VarUI2FromR8(*(double*)src, d); break;
590 case DBTYPE_CY: hr = VarUI2FromCy(*(CY*)src, d); break;
591 case DBTYPE_DATE: hr = VarUI2FromDate(*(DATE*)src, d); break;
592 case DBTYPE_BSTR: hr = VarUI2FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
593 case DBTYPE_BOOL: hr = VarUI2FromBool(*(VARIANT_BOOL*)src, d); break;
594 case DBTYPE_DECIMAL: hr = VarUI2FromDec((DECIMAL*)src, d); break;
595 case DBTYPE_I1: hr = VarUI2FromI1(*(signed char*)src, d); break;
596 case DBTYPE_UI1: hr = VarUI2FromUI1(*(BYTE*)src, d); break;
597 case DBTYPE_UI2: *d = *(WORD*)src; hr = S_OK; break;
598 case DBTYPE_UI4: hr = VarUI2FromUI4(*(DWORD*)src, d); break;
599 case DBTYPE_I8: hr = VarUI2FromI8(*(LONGLONG*)src, d); break;
600 case DBTYPE_UI8: hr = VarUI2FromUI8(*(ULONGLONG*)src, d); break;
601 default: FIXME("Unimplemented conversion %04x -> UI2\n", src_type); return E_NOTIMPL;
602 }
603 break;
604 }
605
606 case DBTYPE_UI4:
607 {
608 DWORD *d = dst;
609 switch(src_type)
610 {
611 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
612 case DBTYPE_I2: hr = VarUI4FromI2(*(signed short*)src, d); break;
613 case DBTYPE_I4: hr = VarUI4FromI4(*(signed int*)src, d); break;
614 case DBTYPE_R4: hr = VarUI4FromR4(*(FLOAT*)src, d); break;
615 case DBTYPE_R8: hr = VarUI4FromR8(*(double*)src, d); break;
616 case DBTYPE_CY: hr = VarUI4FromCy(*(CY*)src, d); break;
617 case DBTYPE_DATE: hr = VarUI4FromDate(*(DATE*)src, d); break;
618 case DBTYPE_BSTR: hr = VarUI4FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
619 case DBTYPE_BOOL: hr = VarUI4FromBool(*(VARIANT_BOOL*)src, d); break;
620 case DBTYPE_DECIMAL: hr = VarUI4FromDec((DECIMAL*)src, d); break;
621 case DBTYPE_I1: hr = VarUI4FromI1(*(signed char*)src, d); break;
622 case DBTYPE_UI1: hr = VarUI4FromUI1(*(BYTE*)src, d); break;
623 case DBTYPE_UI2: hr = VarUI4FromUI2(*(WORD*)src, d); break;
624 case DBTYPE_UI4: *d = *(DWORD*)src; hr = S_OK; break;
625 case DBTYPE_I8: hr = VarUI4FromI8(*(LONGLONG*)src, d); break;
626 case DBTYPE_UI8: hr = VarUI4FromUI8(*(ULONGLONG*)src, d); break;
627 case DBTYPE_VARIANT:
628 VariantInit(&tmp);
629 if ((hr = VariantChangeType(&tmp, (VARIANT*)src, 0, VT_UI4)) == S_OK)
630 *d = V_UI4(&tmp);
631 break;
632 default: FIXME("Unimplemented conversion %04x -> UI4\n", src_type); return E_NOTIMPL;
633 }
634 break;
635 }
636
637 case DBTYPE_UI8:
638 {
639 ULONGLONG *d = dst;
640 switch(src_type)
641 {
642 case DBTYPE_EMPTY: *d = 0; hr = S_OK; break;
643 case DBTYPE_I2: hr = VarUI8FromI2(*(signed short*)src, d); break;
644 case DBTYPE_I4: {LONGLONG s = *(signed int*)src; hr = VarUI8FromI8(s, d); break;}
645 case DBTYPE_R4: hr = VarUI8FromR4(*(FLOAT*)src, d); break;
646 case DBTYPE_R8: hr = VarUI8FromR8(*(double*)src, d); break;
647 case DBTYPE_CY: hr = VarUI8FromCy(*(CY*)src, d); break;
648 case DBTYPE_DATE: hr = VarUI8FromDate(*(DATE*)src, d); break;
649 case DBTYPE_BSTR: hr = VarUI8FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
650 case DBTYPE_BOOL: hr = VarUI8FromBool(*(VARIANT_BOOL*)src, d); break;
651 case DBTYPE_DECIMAL: hr = VarUI8FromDec((DECIMAL*)src, d); break;
652 case DBTYPE_I1: hr = VarUI8FromI1(*(signed char*)src, d); break;
653 case DBTYPE_UI1: hr = VarUI8FromUI1(*(BYTE*)src, d); break;
654 case DBTYPE_UI2: hr = VarUI8FromUI2(*(WORD*)src, d); break;
655 case DBTYPE_UI4: hr = VarUI8FromUI4(*(DWORD*)src, d); break;
656 case DBTYPE_I8: hr = VarUI8FromI8(*(LONGLONG*)src, d); break;
657 case DBTYPE_UI8: *d = *(ULONGLONG*)src; hr = S_OK; break;
658 default: FIXME("Unimplemented conversion %04x -> UI8\n", src_type); return E_NOTIMPL;
659 }
660 break;
661 }
662
663 case DBTYPE_FILETIME:
664 {
665 FILETIME *d = dst;
666 switch(src_type)
667 {
668 case DBTYPE_EMPTY: d->dwLowDateTime = d->dwHighDateTime = 0; hr = S_OK; break;
669 case DBTYPE_FILETIME: *d = *(FILETIME*)src; hr = S_OK; break;
670 default: FIXME("Unimplemented conversion %04x -> FILETIME\n", src_type); return E_NOTIMPL;
671 }
672 break;
673 }
674
675 case DBTYPE_GUID:
676 {
677 GUID *d = dst;
678 switch(src_type)
679 {
680 case DBTYPE_EMPTY: *d = GUID_NULL; hr = S_OK; break;
681 case DBTYPE_GUID: *d = *(GUID*)src; hr = S_OK; break;
682 default: FIXME("Unimplemented conversion %04x -> GUID\n", src_type); return E_NOTIMPL;
683 }
684 break;
685 }
686
687 case DBTYPE_WSTR:
688 {
689 BSTR b;
690 DBLENGTH bstr_len;
691 INT bytes_to_copy;
692 hr = IDataConvert_DataConvert(iface, src_type, DBTYPE_BSTR, src_len, &bstr_len,
693 src, &b, sizeof(BSTR), src_status, dst_status,
694 precision, scale, flags);
695 if(hr != S_OK) return hr;
696 bstr_len = SysStringLen(b);
697 *dst_len = bstr_len * sizeof(WCHAR); /* Doesn't include size for '\0' */
698 *dst_status = DBSTATUS_S_OK;
699 bytes_to_copy = min(*dst_len + sizeof(WCHAR), dst_max_len);
700 if(dst)
701 {
702 if(bytes_to_copy >= sizeof(WCHAR))
703 {
704 memcpy(dst, b, bytes_to_copy - sizeof(WCHAR));
705 *((WCHAR*)dst + bytes_to_copy / sizeof(WCHAR) - 1) = 0;
706 if(bytes_to_copy < *dst_len + sizeof(WCHAR))
707 *dst_status = DBSTATUS_S_TRUNCATED;
708 }
709 else
710 {
711 *dst_status = DBSTATUS_E_DATAOVERFLOW;
712 hr = DB_E_ERRORSOCCURRED;
713 }
714 }
715 SysFreeString(b);
716 return hr;
717 }
718 case DBTYPE_STR:
719 {
720 BSTR b;
721 DBLENGTH bstr_len;
722 INT bytes_to_copy;
723 hr = IDataConvert_DataConvert(iface, src_type, DBTYPE_BSTR, src_len, &bstr_len,
724 src, &b, sizeof(BSTR), src_status, dst_status,
725 precision, scale, flags);
726 if(hr != S_OK) return hr;
727 bstr_len = SysStringLen(b);
728 *dst_len = bstr_len * sizeof(char); /* Doesn't include size for '\0' */
729 *dst_status = DBSTATUS_S_OK;
730 bytes_to_copy = min(*dst_len + sizeof(char), dst_max_len);
731 if(dst)
732 {
733 if(bytes_to_copy >= sizeof(char))
734 {
735 WideCharToMultiByte(CP_ACP, 0, b, bytes_to_copy - sizeof(char), dst, dst_max_len, NULL, NULL);
736 *((char *)dst + bytes_to_copy / sizeof(char) - 1) = 0;
737 if(bytes_to_copy < *dst_len + sizeof(char))
738 *dst_status = DBSTATUS_S_TRUNCATED;
739 }
740 else
741 {
742 *dst_status = DBSTATUS_E_DATAOVERFLOW;
743 hr = DB_E_ERRORSOCCURRED;
744 }
745 }
746 SysFreeString(b);
747 return hr;
748 }
749
750 case DBTYPE_BYREF | DBTYPE_WSTR:
751 {
752 BSTR b;
753 WCHAR **d = dst;
754 DBLENGTH bstr_len;
755 hr = IDataConvert_DataConvert(iface, src_type, DBTYPE_BSTR, src_len, &bstr_len,
756 src, &b, sizeof(BSTR), src_status, dst_status,
757 precision, scale, flags);
758 if(hr != S_OK) return hr;
759
760 bstr_len = SysStringLen(b) * sizeof(WCHAR);
761 *dst_len = bstr_len; /* Doesn't include size for '\0' */
762
763 *d = CoTaskMemAlloc(bstr_len + sizeof(WCHAR));
764 if(*d) memcpy(*d, b, bstr_len + sizeof(WCHAR));
765 else hr = E_OUTOFMEMORY;
766 SysFreeString(b);
767 return hr;
768 }
769
770 case DBTYPE_VARIANT:
771 {
772 VARIANT *v = dst;
773
774 switch(src_type)
775 {
776 case DBTYPE_BOOL:
777 V_VT(v) = VT_BOOL;
778 V_BOOL(v) = *(VARIANT_BOOL*)src;
779 hr = S_OK;
780 break;
781 case DBTYPE_I4:
782 V_VT(v) = VT_I4;
783 V_I4(v) = *(signed int*)src;
784 hr = S_OK;
785 break;
786 case DBTYPE_I8:
787 V_VT(v) = VT_DECIMAL;
788 hr = VarDecFromI8( *(LONGLONG*)src, &V_DECIMAL(v));
789 break;
790 case DBTYPE_R8:
791 V_VT(v) = VT_R8;
792 V_R8(v) = *(double*)src;
793 hr = S_OK;
794 break;
795 case DBTYPE_BSTR:
796 {
797 BSTR s = *(WCHAR**)src;
798 TRACE("%s\n", debugstr_w(s));
799 V_VT(v) = VT_BSTR;
800 V_BSTR(v) = SysAllocString(s);
801 hr = V_BSTR(v) ? S_OK : E_OUTOFMEMORY;
802 break;
803 }
804 case DBTYPE_DATE:
805 V_VT(v) = VT_DATE;
806 V_DATE(v) = *(DATE*)src;
807 hr = S_OK;
808 break;
809 case DBTYPE_DBDATE:
810 {
811 SYSTEMTIME st;
812 DBDATE *ts=(DBDATE*)src;
813
814 V_VT(v) = VT_DATE;
815
816 st.wYear = ts->year;
817 st.wMonth = ts->month;
818 st.wDay = ts->day;
819 st.wHour = 0;
820 st.wMinute = 0;
821 st.wSecond = 0;
822 st.wMilliseconds = 0;
823 hr = (SystemTimeToVariantTime(&st, &V_DATE(v)) ? S_OK : E_FAIL);
824 break;
825 }
826 case DBTYPE_DBTIMESTAMP:
827 {
828 SYSTEMTIME st;
829 DBTIMESTAMP *ts = (DBTIMESTAMP *)src;
830
831 V_VT(v) = VT_DATE;
832
833 st.wYear = ts->year;
834 st.wMonth = ts->month;
835 st.wDay = ts->day;
836 st.wHour = ts->hour;
837 st.wMinute = ts->minute;
838 st.wSecond = ts->second;
839 st.wMilliseconds = ts->fraction/1000000;
840 hr = SystemTimeToVariantTime(&st, &V_DATE(v)) ? S_OK : E_FAIL;
841 break;
842 }
843 case DBTYPE_CY:
844 V_VT(v) = VT_CY;
845 V_CY(v) = *(CY*)src;
846 hr = S_OK;
847 break;
848 case DBTYPE_BYTES:
849 {
850 LONG i;
851 LONG size;
852 SAFEARRAY *psa = NULL;
853 SAFEARRAYBOUND rgsabound[1];
854 unsigned char *p = src;
855
856 size = min(src_len, dst_max_len);
857
858 rgsabound[0].lLbound = 0;
859 rgsabound[0].cElements = size;
860
861 psa = SafeArrayCreate(VT_UI1,1,rgsabound);
862 for(i =0; i < size; i++,p++)
863 {
864 hr = SafeArrayPutElement(psa, &i, &p);
865 if(FAILED(hr))
866 return hr;
867 }
868
869 V_VT(v) = VT_ARRAY|VT_UI1;
870 V_ARRAY(v) = psa;
871 hr = S_OK;
872 break;
873 }
874 default: FIXME("Unimplemented conversion %04x -> VARIANT\n", src_type); return E_NOTIMPL;
875 }
876 break;
877 }
878 case DBTYPE_BYTES:
879 {
880 BYTE *d = dst;
881
882 switch(src_type)
883 {
884 case DBTYPE_BYTES:
885 if( src_len > dst_max_len)
886 *dst_status = DBSTATUS_S_TRUNCATED;
887 else
888 *dst_status = DBSTATUS_S_OK;
889
890 *dst_len = src_len;
891 memcpy(d, src, min(src_len, dst_max_len));
892
893 return S_OK;
894 default: FIXME("Unimplemented conversion %04x -> DBTYPE_BYTES\n", src_type); return E_NOTIMPL;
895 }
896 break;
897 }
898
899 default:
900 FIXME("Unimplemented conversion %04x -> %04x\n", src_type, dst_type);
901 return E_NOTIMPL;
902 }
903
904 if(hr == DISP_E_OVERFLOW)
905 {
906 *dst_status = DBSTATUS_E_DATAOVERFLOW;
907 *dst_len = get_length(dst_type);
908 hr = DB_E_ERRORSOCCURRED;
909 }
910 else if(hr == S_OK)
911 {
912 *dst_status = DBSTATUS_S_OK;
913 *dst_len = get_length(dst_type);
914 }
915
916 return hr;
917 }
918
919 static inline WORD get_dbtype_class(DBTYPE type)
920 {
921 switch(type)
922 {
923 case DBTYPE_I2:
924 case DBTYPE_R4:
925 case DBTYPE_R8:
926 case DBTYPE_I1:
927 case DBTYPE_UI1:
928 case DBTYPE_UI2:
929 return DBTYPE_I2;
930
931 case DBTYPE_I4:
932 case DBTYPE_UI4:
933 return DBTYPE_I4;
934
935 case DBTYPE_I8:
936 case DBTYPE_UI8:
937 return DBTYPE_I8;
938
939 case DBTYPE_BSTR:
940 case DBTYPE_STR:
941 case DBTYPE_WSTR:
942 return DBTYPE_BSTR;
943
944 case DBTYPE_DBDATE:
945 case DBTYPE_DBTIME:
946 case DBTYPE_DBTIMESTAMP:
947 return DBTYPE_DBDATE;
948 }
949 return type;
950 }
951
952 /* Many src types will convert to this group of dst types */
953 static inline BOOL common_class(WORD dst_class)
954 {
955 switch(dst_class)
956 {
957 case DBTYPE_EMPTY:
958 case DBTYPE_NULL:
959 case DBTYPE_I2:
960 case DBTYPE_I4:
961 case DBTYPE_BSTR:
962 case DBTYPE_BOOL:
963 case DBTYPE_VARIANT:
964 case DBTYPE_I8:
965 case DBTYPE_CY:
966 case DBTYPE_DECIMAL:
967 case DBTYPE_NUMERIC:
968 return TRUE;
969 }
970 return FALSE;
971 }
972
973 static inline BOOL array_type(DBTYPE type)
974 {
975 return (type >= DBTYPE_I2 && type <= DBTYPE_UI4);
976 }
977
978 static HRESULT WINAPI convert_CanConvert(IDataConvert* iface,
979 DBTYPE src_type, DBTYPE dst_type)
980 {
981 convert *This = impl_from_IDataConvert(iface);
982 DBTYPE src_base_type = src_type & 0x1ff;
983 DBTYPE dst_base_type = dst_type & 0x1ff;
984 WORD dst_class = get_dbtype_class(dst_base_type);
985
986 TRACE("(%p)->(%d, %d)\n", This, src_type, dst_type);
987
988 if(src_type & DBTYPE_VECTOR || dst_type & DBTYPE_VECTOR) return S_FALSE;
989
990 if(src_type & DBTYPE_ARRAY)
991 {
992 if(!array_type(src_base_type)) return S_FALSE;
993 if(dst_type & DBTYPE_ARRAY)
994 {
995 if(src_type == dst_type) return S_OK;
996 return S_FALSE;
997 }
998 if(dst_type == DBTYPE_VARIANT) return S_OK;
999 return S_FALSE;
1000 }
1001
1002 if(dst_type & DBTYPE_ARRAY)
1003 {
1004 if(!array_type(dst_base_type)) return S_FALSE;
1005 if(src_type == DBTYPE_IDISPATCH || src_type == DBTYPE_VARIANT) return S_OK;
1006 return S_FALSE;
1007 }
1008
1009 if(dst_type & DBTYPE_BYREF)
1010 if(dst_base_type != DBTYPE_BYTES && dst_base_type != DBTYPE_STR && dst_base_type != DBTYPE_WSTR)
1011 return S_FALSE;
1012
1013 switch(get_dbtype_class(src_base_type))
1014 {
1015 case DBTYPE_EMPTY:
1016 if(common_class(dst_class)) return S_OK;
1017 switch(dst_class)
1018 {
1019 case DBTYPE_DATE:
1020 case DBTYPE_GUID:
1021 case DBTYPE_FILETIME:
1022 return S_OK;
1023 default:
1024 if(dst_base_type == DBTYPE_DBTIMESTAMP) return S_OK;
1025 return S_FALSE;
1026 }
1027
1028 case DBTYPE_NULL:
1029 switch(dst_base_type)
1030 {
1031 case DBTYPE_NULL:
1032 case DBTYPE_VARIANT:
1033 case DBTYPE_FILETIME: return S_OK;
1034 default: return S_FALSE;
1035 }
1036
1037 case DBTYPE_I4:
1038 if(dst_base_type == DBTYPE_BYTES) return S_OK;
1039 /* fall through */
1040 case DBTYPE_I2:
1041 if(dst_base_type == DBTYPE_DATE) return S_OK;
1042 /* fall through */
1043 case DBTYPE_DECIMAL:
1044 if(common_class(dst_class)) return S_OK;
1045 if(dst_class == DBTYPE_DBDATE) return S_OK;
1046 return S_FALSE;
1047
1048 case DBTYPE_BOOL:
1049 if(dst_base_type == DBTYPE_DATE) return S_OK;
1050 /* fall through */
1051 case DBTYPE_NUMERIC:
1052 case DBTYPE_CY:
1053 if(common_class(dst_class)) return S_OK;
1054 return S_FALSE;
1055
1056 case DBTYPE_I8:
1057 if(common_class(dst_class)) return S_OK;
1058 switch(dst_base_type)
1059 {
1060 case DBTYPE_BYTES:
1061 case DBTYPE_FILETIME: return S_OK;
1062 default: return S_FALSE;
1063 }
1064
1065 case DBTYPE_DATE:
1066 switch(dst_class)
1067 {
1068 case DBTYPE_EMPTY:
1069 case DBTYPE_NULL:
1070 case DBTYPE_I2:
1071 case DBTYPE_I4:
1072 case DBTYPE_BSTR:
1073 case DBTYPE_BOOL:
1074 case DBTYPE_VARIANT:
1075 case DBTYPE_I8:
1076 case DBTYPE_DATE:
1077 case DBTYPE_DBDATE:
1078 case DBTYPE_FILETIME:
1079 return S_OK;
1080 default: return S_FALSE;
1081 }
1082
1083 case DBTYPE_IDISPATCH:
1084 case DBTYPE_VARIANT:
1085 switch(dst_base_type)
1086 {
1087 case DBTYPE_IDISPATCH:
1088 case DBTYPE_ERROR:
1089 case DBTYPE_IUNKNOWN:
1090 return S_OK;
1091 }
1092 /* fall through */
1093 case DBTYPE_BSTR:
1094 if(common_class(dst_class)) return S_OK;
1095 switch(dst_class)
1096 {
1097 case DBTYPE_DATE:
1098 case DBTYPE_GUID:
1099 case DBTYPE_BYTES:
1100 case DBTYPE_DBDATE:
1101 case DBTYPE_FILETIME:
1102 return S_OK;
1103 default: return S_FALSE;
1104 }
1105
1106 case DBTYPE_ERROR:
1107 switch(dst_base_type)
1108 {
1109 case DBTYPE_BSTR:
1110 case DBTYPE_ERROR:
1111 case DBTYPE_VARIANT:
1112 case DBTYPE_WSTR:
1113 return S_OK;
1114 default: return S_FALSE;
1115 }
1116
1117 case DBTYPE_IUNKNOWN:
1118 switch(dst_base_type)
1119 {
1120 case DBTYPE_EMPTY:
1121 case DBTYPE_NULL:
1122 case DBTYPE_IDISPATCH:
1123 case DBTYPE_VARIANT:
1124 case DBTYPE_IUNKNOWN:
1125 return S_OK;
1126 default: return S_FALSE;
1127 }
1128
1129 case DBTYPE_BYTES:
1130 if(dst_class == DBTYPE_I4 || dst_class == DBTYPE_I8) return S_OK;
1131 /* fall through */
1132 case DBTYPE_GUID:
1133 switch(dst_class)
1134 {
1135 case DBTYPE_EMPTY:
1136 case DBTYPE_NULL:
1137 case DBTYPE_BSTR:
1138 case DBTYPE_VARIANT:
1139 case DBTYPE_GUID:
1140 case DBTYPE_BYTES:
1141 return S_OK;
1142 default: return S_FALSE;
1143 }
1144
1145 case DBTYPE_FILETIME:
1146 if(dst_class == DBTYPE_I8) return S_OK;
1147 /* fall through */
1148 case DBTYPE_DBDATE:
1149 switch(dst_class)
1150 {
1151 case DBTYPE_EMPTY:
1152 case DBTYPE_NULL:
1153 case DBTYPE_DATE:
1154 case DBTYPE_BSTR:
1155 case DBTYPE_VARIANT:
1156 case DBTYPE_DBDATE:
1157 case DBTYPE_FILETIME:
1158 return S_OK;
1159 default: return S_FALSE;
1160 }
1161
1162 }
1163 return S_FALSE;
1164 }
1165
1166 static HRESULT WINAPI convert_GetConversionSize(IDataConvert* iface,
1167 DBTYPE src_type, DBTYPE dst_type,
1168 DBLENGTH *src_len, DBLENGTH *dst_len,
1169 void *src)
1170 {
1171 convert *This = impl_from_IDataConvert(iface);
1172 HRESULT hr;
1173
1174 TRACE("(%p)->(%d, %d, %p, %p, %p)\n", This, src_type, dst_type, src_len, dst_len, src);
1175
1176 hr = IDataConvert_CanConvert(iface, src_type, dst_type);
1177 if (hr != S_OK)
1178 return DB_E_UNSUPPORTEDCONVERSION;
1179
1180 if (!dst_len)
1181 return E_INVALIDARG;
1182
1183 /* for some types we don't need to look into source data */
1184 if ((*dst_len = get_length(dst_type)))
1185 return S_OK;
1186
1187 switch (dst_type)
1188 {
1189 case DBTYPE_STR:
1190 {
1191 switch (src_type)
1192 {
1193 case DBTYPE_VARIANT:
1194 {
1195 VARIANT v;
1196
1197 VariantInit(&v);
1198 if ((hr = VariantChangeType(&v, (VARIANT*)src, 0, VT_BSTR)) == S_OK)
1199 {
1200 *dst_len = WideCharToMultiByte(CP_ACP, 0, V_BSTR(&v), -1, NULL, 0, NULL, NULL);
1201 VariantClear(&v);
1202 }
1203 else
1204 return hr;
1205 }
1206 break;
1207 default:
1208 FIXME("unimplemented for %04x -> DBTYPE_STR\n", src_type);
1209 return E_NOTIMPL;
1210 }
1211 }
1212 break;
1213 case DBTYPE_WSTR:
1214 {
1215 switch (src_type)
1216 {
1217 case DBTYPE_VARIANT:
1218 {
1219 VARIANT v;
1220
1221 VariantInit(&v);
1222 if ((hr = VariantChangeType(&v, (VARIANT*)src, 0, VT_BSTR)) == S_OK)
1223 {
1224 *dst_len = (SysStringLen(V_BSTR(&v)) + 1) * sizeof(WCHAR);
1225 VariantClear(&v);
1226 }
1227 else
1228 return hr;
1229 }
1230 break;
1231 case DBTYPE_STR:
1232 if(src_len)
1233 *dst_len = (*src_len + 1) * sizeof(WCHAR);
1234 else
1235 *dst_len = (strlen(src) + 1) * sizeof(WCHAR);
1236 break;
1237 case DBTYPE_WSTR:
1238 if(src_len)
1239 *dst_len = (*src_len) + sizeof(WCHAR);
1240 else
1241 *dst_len = (lstrlenW(src) + 1) * sizeof(WCHAR);
1242 break;
1243 default:
1244 FIXME("unimplemented for %04x -> DBTYPE_WSTR\n", src_type);
1245 return E_NOTIMPL;
1246 }
1247 }
1248 break;
1249 default:
1250 FIXME("unimplemented for conversion %d->%d\n", src_type, dst_type);
1251 return E_NOTIMPL;
1252 }
1253
1254 return S_OK;
1255 }
1256
1257 static const struct IDataConvertVtbl convert_vtbl =
1258 {
1259 convert_QueryInterface,
1260 convert_AddRef,
1261 convert_Release,
1262 convert_DataConvert,
1263 convert_CanConvert,
1264 convert_GetConversionSize
1265 };
1266
1267 static HRESULT WINAPI dcinfo_QueryInterface(IDCInfo* iface, REFIID riid, void **obj)
1268 {
1269 convert *This = impl_from_IDCInfo(iface);
1270
1271 return IDataConvert_QueryInterface(&This->IDataConvert_iface, riid, obj);
1272 }
1273
1274 static ULONG WINAPI dcinfo_AddRef(IDCInfo* iface)
1275 {
1276 convert *This = impl_from_IDCInfo(iface);
1277
1278 return IDataConvert_AddRef(&This->IDataConvert_iface);
1279 }
1280
1281 static ULONG WINAPI dcinfo_Release(IDCInfo* iface)
1282 {
1283 convert *This = impl_from_IDCInfo(iface);
1284
1285 return IDataConvert_Release(&This->IDataConvert_iface);
1286 }
1287
1288 static HRESULT WINAPI dcinfo_GetInfo(IDCInfo *iface, ULONG num, DCINFOTYPE types[], DCINFO **info_ptr)
1289 {
1290 convert *This = impl_from_IDCInfo(iface);
1291 ULONG i;
1292 DCINFO *infos;
1293
1294 TRACE("(%p)->(%d, %p, %p)\n", This, num, types, info_ptr);
1295
1296 *info_ptr = infos = CoTaskMemAlloc(num * sizeof(*infos));
1297 if(!infos) return E_OUTOFMEMORY;
1298
1299 for(i = 0; i < num; i++)
1300 {
1301 infos[i].eInfoType = types[i];
1302 VariantInit(&infos[i].vData);
1303
1304 switch(types[i])
1305 {
1306 case DCINFOTYPE_VERSION:
1307 V_VT(&infos[i].vData) = VT_UI4;
1308 V_UI4(&infos[i].vData) = This->version;
1309 break;
1310 }
1311 }
1312
1313 return S_OK;
1314 }
1315
1316 static HRESULT WINAPI dcinfo_SetInfo(IDCInfo* iface, ULONG num, DCINFO info[])
1317 {
1318 convert *This = impl_from_IDCInfo(iface);
1319 ULONG i;
1320 HRESULT hr = S_OK;
1321
1322 TRACE("(%p)->(%d, %p)\n", This, num, info);
1323
1324 for(i = 0; i < num; i++)
1325 {
1326 switch(info[i].eInfoType)
1327 {
1328 case DCINFOTYPE_VERSION:
1329 if(V_VT(&info[i].vData) != VT_UI4)
1330 {
1331 FIXME("VERSION with vt %x\n", V_VT(&info[i].vData));
1332 hr = DB_S_ERRORSOCCURRED;
1333 break;
1334 }
1335 This->version = V_UI4(&info[i].vData);
1336 break;
1337
1338 default:
1339 FIXME("Unhandled info type %d (vt %x)\n", info[i].eInfoType, V_VT(&info[i].vData));
1340 }
1341 }
1342 return hr;
1343 }
1344
1345 static const struct IDCInfoVtbl dcinfo_vtbl =
1346 {
1347 dcinfo_QueryInterface,
1348 dcinfo_AddRef,
1349 dcinfo_Release,
1350 dcinfo_GetInfo,
1351 dcinfo_SetInfo
1352 };
1353
1354 HRESULT create_oledb_convert(IUnknown *outer, void **obj)
1355 {
1356 convert *This;
1357
1358 TRACE("(%p, %p)\n", outer, obj);
1359
1360 *obj = NULL;
1361
1362 if(outer) return CLASS_E_NOAGGREGATION;
1363
1364 This = HeapAlloc(GetProcessHeap(), 0, sizeof(*This));
1365 if(!This) return E_OUTOFMEMORY;
1366
1367 This->IDataConvert_iface.lpVtbl = &convert_vtbl;
1368 This->IDCInfo_iface.lpVtbl = &dcinfo_vtbl;
1369 This->ref = 1;
1370 This->version = 0x110;
1371
1372 *obj = &This->IDataConvert_iface;
1373
1374 return S_OK;
1375 }
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