ole/ole2disp.c

   1 /*
   2  *      OLE2DISP library
   3  *
   4  *      Copyright 1995  Martin von Loewis
   5  */
   6
   7 #include <string.h>
   8 #include "winerror.h"
   9 #include "ole2.h"
  10 #include "oleauto.h"
  11 #include "wine/obj_base.h"
  12 #include "heap.h"
  13 #include "ldt.h"
  14 #include "debug.h"
  15
  16 /* This implementation of the BSTR API is 16-bit only. It
  17    represents BSTR as a 16:16 far pointer, and the strings
  18    as ISO-8859 */
  19
  20 /******************************************************************************
  21  *              BSTR_AllocBytes [Internal]
  22  */
  23 static BSTR16 BSTR_AllocBytes(int n)
  24 {
  25     void *ptr = SEGPTR_ALLOC(n);
  26     return (BSTR16)SEGPTR_GET(ptr);
  27 }
  28
  29 /******************************************************************************
  30  * BSTR_Free [INTERNAL]
  31  */
  32 static void BSTR_Free(BSTR16 in)
  33 {
  34     SEGPTR_FREE( PTR_SEG_TO_LIN(in) );
  35 }
  36
  37 /******************************************************************************
  38  * BSTR_GetAddr [INTERNAL]
  39  */
  40 static void* BSTR_GetAddr(BSTR16 in)
  41 {
  42     return in ? PTR_SEG_TO_LIN(in) : 0;
  43 }
  44
  45 /******************************************************************************
  46  *              SysAllocString16        [OLE2DISP.2]
  47  */
  48 BSTR16 WINAPI SysAllocString16(LPCOLESTR16 in)
  49 {
  50         BSTR16 out=BSTR_AllocBytes(strlen(in)+1);
  51         if(!out)return 0;
  52         strcpy(BSTR_GetAddr(out),in);
  53         return out;
  54 }
  55
  56 /******************************************************************************
  57  *              SysAllocString32        [OLEAUT32.2]
  58  */
  59 BSTR WINAPI SysAllocString(LPCOLESTR in)
  60 {
  61     /* Delegate this to the SysAllocStringLen32 method. */
  62     return SysAllocStringLen(in, lstrlenW(in));
  63 }
  64
  65 /******************************************************************************
  66  *              SysReAllocString16      [OLE2DISP.3]
  67  */
  68 INT16 WINAPI SysReAllocString16(LPBSTR16 old,LPCOLESTR16 in)
  69 {
  70         BSTR16 new=SysAllocString16(in);
  71         BSTR_Free(*old);
  72         *old=new;
  73         return 1;
  74 }
  75
  76 /******************************************************************************
  77  *              SysReAllocString32      [OLEAUT32.3]
  78  */
  79 INT WINAPI SysReAllocString(LPBSTR old,LPCOLESTR in)
  80 {
  81     /*
  82      * Sanity check
  83      */
  84     if (old==NULL)
  85       return 0;
  86
  87     /*
  88      * Make sure we free the old string.
  89      */
  90     if (*old!=NULL)
  91       SysFreeString(*old);
  92
  93     /*
  94      * Allocate the new string
  95      */
  96     *old = SysAllocString(in);
  97
  98      return 1;
  99 }
 100
 101 /******************************************************************************
 102  *              SysAllocStringLen16     [OLE2DISP.4]
 103  */
 104 BSTR16 WINAPI SysAllocStringLen16(const char *in, int len)
 105 {
 106         BSTR16 out=BSTR_AllocBytes(len+1);
 107         if(!out)return 0;
 108         strcpy(BSTR_GetAddr(out),in);
 109         return out;
 110 }
 111
 112 /******************************************************************************
 113  *             SysAllocStringLen32     [OLEAUT32.4]
 114  *
 115  * In "Inside OLE, second edition" by Kraig Brockshmidt. In the Automation
 116  * section, he describes the DWORD value placed before the BSTR data type.
 117  * he describes it as a "DWORD count of characters". By experimenting with
 118  * a windows application, this count seems to be a DWORD count of bytes in
 119  * the string. Meaning that the count is double the number of wide
 120  * characters in the string.
 121  */
 122 BSTR WINAPI SysAllocStringLen(const OLECHAR *in, unsigned int len)
 123 {
 124     DWORD  bufferSize;
 125     DWORD* newBuffer;
 126     WCHAR* stringBuffer;
 127
 128     /*
 129      * Find the lenth of the buffer passed-in in bytes.
 130      */
 131     bufferSize = len * sizeof (WCHAR);
 132
 133     /*
 134      * Allocate a new buffer to hold the string.
 135      * dont't forget to keep an empty spot at the begining of the
 136      * buffer for the character count and an extra character at the
 137      * end for the NULL.
 138      */
 139     newBuffer = (DWORD*)HeapAlloc(GetProcessHeap(),
 140                                  0,
 141                                  bufferSize + sizeof(WCHAR) + sizeof(DWORD));
 142
 143     /*
 144      * If the memory allocation failed, return a null pointer.
 145      */
 146     if (newBuffer==0)
 147       return 0;
 148
 149     /*
 150      * Copy the length of the string in the placeholder.
 151      */
 152     *newBuffer = bufferSize;
 153
 154     /*
 155      * Skip the byte count.
 156      */
 157     newBuffer++;
 158
 159     /*
 160      * Copy the information in the buffer.
 161      * Since it is valid to pass a NULL pointer here, we'll initialize the
 162      * buffer to nul if it is the case.
 163      */
 164     if (in != 0)
 165       memcpy(newBuffer, in, bufferSize);
 166     else
 167       memset(newBuffer, 0, bufferSize);
 168
 169     /*
 170      * Make sure that there is a nul character at the end of the
 171      * string.
 172      */
 173     stringBuffer = (WCHAR*)newBuffer;
 174     stringBuffer[len] = L'\0';
 175
 176     return (LPWSTR)stringBuffer;
 177 }
 178
 179 /******************************************************************************
 180  *              SysReAllocStringLen16   [OLE2DISP.5]
 181  */
 182 int WINAPI SysReAllocStringLen16(BSTR16 *old,const char *in,int len)
 183 {
 184         BSTR16 new=SysAllocStringLen16(in,len);
 185         BSTR_Free(*old);
 186         *old=new;
 187         return 1;
 188 }
 189
 190
 191 /******************************************************************************
 192  *             SysReAllocStringLen32   [OLEAUT32.5]
 193  */
 194 int WINAPI SysReAllocStringLen(BSTR* old, const OLECHAR* in, unsigned int len)
 195 {
 196     /*
 197      * Sanity check
 198      */
 199     if (old==NULL)
 200       return 0;
 201
 202     /*
 203      * Make sure we free the old string.
 204      */
 205     if (*old!=NULL)
 206       SysFreeString(*old);
 207
 208     /*
 209      * Allocate the new string
 210      */
 211     *old = SysAllocStringLen(in, len);
 212
 213     return 1;
 214 }
 215
 216 /******************************************************************************
 217  *              SysFreeString16 [OLE2DISP.6]
 218  */
 219 void WINAPI SysFreeString16(BSTR16 in)
 220 {
 221         BSTR_Free(in);
 222 }
 223
 224 /******************************************************************************
 225  *              SysFreeString32 [OLEAUT32.6]
 226  */
 227 void WINAPI SysFreeString(BSTR in)
 228 {
 229     DWORD* bufferPointer;
 230
 231     /*
 232      * We have to be careful when we free a BSTR pointer, it points to
 233      * the beginning of the string but it skips the byte count contained
 234      * before the string.
 235      */
 236     bufferPointer = (DWORD*)in;
 237
 238     bufferPointer--;
 239
 240     /*
 241      * Free the memory from it's "real" origin.
 242      */
 243     HeapFree(GetProcessHeap(), 0, bufferPointer);
 244 }
 245
 246 /******************************************************************************
 247  *              SysStringLen16  [OLE2DISP.7]
 248  */
 249 int WINAPI SysStringLen16(BSTR16 str)
 250 {
 251         return strlen(BSTR_GetAddr(str));
 252 }
 253
 254 /******************************************************************************
 255  *             SysStringLen32  [OLEAUT32.7]
 256  *
 257  * The Windows documentation states that the length returned by this function
 258  * is not necessarely the same as the length returned by the _lstrlenW method.
 259  * It is the same number that was passed in as the "len" parameter if the
 260  * string was allocated with a SysAllocStringLen method call.
 261  */
 262 int WINAPI SysStringLen(BSTR str)
 263 {
 264     DWORD* bufferPointer;
 265
 266     /*
 267      * The length of the string (in bytes) is contained in a DWORD placed
 268      * just before the BSTR pointer
 269      */
 270     bufferPointer = (DWORD*)str;
 271
 272     bufferPointer--;
 273
 274     return (int)(*bufferPointer/sizeof(WCHAR));
 275 }
 276
 277 /******************************************************************************
 278  *             SysStringByteLen  [OLEAUT32.149]
 279  *
 280  * The Windows documentation states that the length returned by this function
 281  * is not necessarely the same as the length returned by the _lstrlenW method.
 282  * It is the same number that was passed in as the "len" parameter if the
 283  * string was allocated with a SysAllocStringLen method call.
 284  */
 285 int WINAPI SysStringByteLen(BSTR str)
 286 {
 287   return SysStringLen(str)*sizeof(WCHAR);
 288 }
 289
 290 /******************************************************************************
 291  * CreateDispTypeInfo [OLE2DISP.31]
 292  */
 293 HRESULT WINAPI CreateDispTypeInfo16(
 294         INTERFACEDATA *pidata,
 295         LCID lcid,
 296         ITypeInfo **pptinfo
 297 ) {
 298         FIXME(ole,"(%p,%ld,%p),stub\n",pidata,lcid,pptinfo);
 299         return 0;
 300 }
 301
 302 /******************************************************************************
 303  * RegisterActiveObject [OLE2DISP.35]
 304  */
 305 HRESULT WINAPI RegisterActiveObject16(
 306         IUnknown *punk, REFCLSID rclsid, DWORD dwFlags, unsigned long *pdwRegister
 307 ) {
 308         char    buf[80];
 309         WINE_StringFromCLSID(rclsid,buf);
 310         FIXME(ole,"(%p,%s,0x%08lx,%p):stub\n",punk,buf,dwFlags,pdwRegister);
 311         return 0;
 312 }
 313
 314 /******************************************************************************
 315  *              OleTranslateColor       [OLEAUT32.421]
 316  */
 317 INT WINAPI OleTranslateColor(
 318   LONG clr,
 319   HPALETTE  hpal,
 320   COLORREF* pColorRef)
 321 {
 322   FIXME(ole,"():stub\n");
 323
 324   *pColorRef = clr;
 325
 326   return S_OK;
 327 }
 328
 329 /******************************************************************************
 330  *             SysAllocStringByteLen     [OLEAUT32.150]
 331  *
 332  */
 333 BSTR WINAPI SysAllocStringByteLen(char *in, int len)
 334 {
 335     DWORD* newBuffer;
 336     char* stringBuffer;
 337
 338     /*
 339      * Allocate a new buffer to hold the string.
 340      * dont't forget to keep an empty spot at the begining of the
 341      * buffer for the character count and an extra character at the
 342      * end for the NULL.
 343      */
 344     newBuffer = (DWORD*)HeapAlloc(GetProcessHeap(),
 345                                  0,
 346                                  len + sizeof(WCHAR) + sizeof(DWORD));
 347
 348     /*
 349      * If the memory allocation failed, return a null pointer.
 350      */
 351     if (newBuffer==0)
 352       return 0;
 353
 354     /*
 355      * Copy the length of the string in the placeholder.
 356      */
 357     *newBuffer = len;
 358
 359     /*
 360      * Skip the byte count.
 361      */
 362     newBuffer++;
 363
 364     /*
 365      * Copy the information in the buffer.
 366      * Since it is valid to pass a NULL pointer here, we'll initialize the
 367      * buffer to nul if it is the case.
 368      */
 369     if (in != 0)
 370       memcpy(newBuffer, in, len);
 371
 372     /*
 373      * Make sure that there is a nul character at the end of the
 374      * string.
 375      */
 376     stringBuffer = (char *)newBuffer;
 377     stringBuffer[len] = 0;
 378     stringBuffer[len+1] = 0;
 379
 380     return (LPWSTR)stringBuffer;
 381 }
 382
 383