ole/ole2disp.c

   1 /*
   2  *      OLE2DISP library
   3  *
   4  *      Copyright 1995  Martin von Loewis
   5  */
   6
   7 #include <string.h>
   8 #include "windows.h"
   9 #include "winerror.h"
  10 #include "ole.h"
  11 #include "ole2.h"
  12 #include "oleauto.h"
  13 #include "wtypes.h"
  14 #include "wine/obj_base.h"
  15 #include "objbase.h"
  16 #include "heap.h"
  17 #include "ldt.h"
  18 #include "debug.h"
  19
  20 /* This implementation of the BSTR API is 16-bit only. It
  21    represents BSTR as a 16:16 far pointer, and the strings
  22    as ISO-8859 */
  23
  24 /******************************************************************************
  25  *              BSTR_AllocBytes [Internal]
  26  */
  27 static BSTR16 BSTR_AllocBytes(int n)
  28 {
  29     void *ptr = SEGPTR_ALLOC(n);
  30     return (BSTR16)SEGPTR_GET(ptr);
  31 }
  32
  33 /******************************************************************************
  34  * BSTR_Free [INTERNAL]
  35  */
  36 static void BSTR_Free(BSTR16 in)
  37 {
  38     SEGPTR_FREE( PTR_SEG_TO_LIN(in) );
  39 }
  40
  41 /******************************************************************************
  42  * BSTR_GetAddr [INTERNAL]
  43  */
  44 static void* BSTR_GetAddr(BSTR16 in)
  45 {
  46     return in ? PTR_SEG_TO_LIN(in) : 0;
  47 }
  48
  49 /******************************************************************************
  50  *              SysAllocString16        [OLE2DISP.2]
  51  */
  52 BSTR16 WINAPI SysAllocString16(LPOLESTR16 in)
  53 {
  54         BSTR16 out=BSTR_AllocBytes(strlen(in)+1);
  55         if(!out)return 0;
  56         strcpy(BSTR_GetAddr(out),in);
  57         return out;
  58 }
  59
  60 /******************************************************************************
  61  *              SysAllocString32        [OLEAUT32.2]
  62  */
  63 BSTR32 WINAPI SysAllocString32(LPOLESTR32 in)
  64 {
  65     /* Delegate this to the SysAllocStringLen32 method. */
  66     return SysAllocStringLen32(in, lstrlen32W(in));
  67 }
  68
  69 /******************************************************************************
  70  *              SysReAllocString16      [OLE2DISP.3]
  71  */
  72 INT16 WINAPI SysReAllocString16(LPBSTR16 old,LPOLESTR16 in)
  73 {
  74         BSTR16 new=SysAllocString16(in);
  75         BSTR_Free(*old);
  76         *old=new;
  77         return 1;
  78 }
  79
  80 /******************************************************************************
  81  *              SysReAllocString32      [OLEAUT32.3]
  82  */
  83 INT32 WINAPI SysReAllocString32(LPBSTR32 old,LPOLESTR32 in)
  84 {
  85     /*
  86      * Sanity check
  87      */
  88     if (old==NULL)
  89       return 0;
  90
  91     /*
  92      * Make sure we free the old string.
  93      */
  94     if (*old!=NULL)
  95       SysFreeString32(*old);
  96
  97     /*
  98      * Allocate the new string
  99      */
 100     *old = SysAllocString32(in);
 101
 102      return 1;
 103 }
 104
 105 /******************************************************************************
 106  *              SysAllocStringLen16     [OLE2DISP.4]
 107  */
 108 BSTR16 WINAPI SysAllocStringLen16(char *in, int len)
 109 {
 110         BSTR16 out=BSTR_AllocBytes(len+1);
 111         if(!out)return 0;
 112         strcpy(BSTR_GetAddr(out),in);
 113         return out;
 114 }
 115
 116 /******************************************************************************
 117  *             SysAllocStringLen32     [OLEAUT32.4]
 118  *
 119  * In "Inside OLE, second edition" by Kraig Brockshmidt. In the Automation
 120  * section, he describes the DWORD value placed before the BSTR data type.
 121  * he describes it as a "DWORD count of characters". By experimenting with
 122  * a windows application, this count seems to be a DWORD count of bytes in
 123  * the string. Meaning that the count is double the number of wide
 124  * characters in the string.
 125  */
 126 BSTR32 WINAPI SysAllocStringLen32(WCHAR *in, int len)
 127 {
 128     DWORD  bufferSize;
 129     DWORD* newBuffer;
 130     WCHAR* stringBuffer;
 131
 132     /*
 133      * Find the lenth of the buffer passed-in in bytes.
 134      */
 135     bufferSize = len * sizeof (WCHAR);
 136
 137     /*
 138      * Allocate a new buffer to hold the string.
 139      * dont't forget to keep an empty spot at the begining of the
 140      * buffer for the character count and an extra character at the
 141      * end for the NULL.
 142      */
 143     newBuffer = (DWORD*)HeapAlloc(GetProcessHeap(),
 144                                  0,
 145                                  bufferSize + sizeof(WCHAR) + sizeof(DWORD));
 146
 147     /*
 148      * If the memory allocation failed, return a null pointer.
 149      */
 150     if (newBuffer==0)
 151       return 0;
 152
 153     /*
 154      * Copy the length of the string in the placeholder.
 155      */
 156     *newBuffer = bufferSize;
 157
 158     /*
 159      * Skip the byte count.
 160      */
 161     newBuffer++;
 162
 163     /*
 164      * Copy the information in the buffer.
 165      * Since it is valid to pass a NULL pointer here, we'll initialize the
 166      * buffer to nul if it is the case.
 167      */
 168     if (in != 0)
 169       memcpy(newBuffer, in, bufferSize);
 170     else
 171       memset(newBuffer, 0, bufferSize);
 172
 173     /*
 174      * Make sure that there is a nul character at the end of the
 175      * string.
 176      */
 177     stringBuffer = (WCHAR*)newBuffer;
 178     stringBuffer[len] = L'\0';
 179
 180     return (LPWSTR)stringBuffer;
 181 }
 182
 183 /******************************************************************************
 184  *              SysReAllocStringLen16   [OLE2DISP.5]
 185  */
 186 int WINAPI SysReAllocStringLen16(BSTR16 *old,char *in,int len)
 187 {
 188         BSTR16 new=SysAllocStringLen16(in,len);
 189         BSTR_Free(*old);
 190         *old=new;
 191         return 1;
 192 }
 193
 194
 195 /******************************************************************************
 196  *             SysReAllocStringLen32   [OLEAUT32.5]
 197  */
 198 int WINAPI SysReAllocStringLen32(BSTR32* old, WCHAR* in, int len)
 199 {
 200     /*
 201      * Sanity check
 202      */
 203     if (old==NULL)
 204       return 0;
 205
 206     /*
 207      * Make sure we free the old string.
 208      */
 209     if (*old!=NULL)
 210       SysFreeString32(*old);
 211
 212     /*
 213      * Allocate the new string
 214      */
 215     *old = SysAllocStringLen32(in, len);
 216
 217     return 1;
 218 }
 219
 220 /******************************************************************************
 221  *              SysFreeString16 [OLE2DISP.6]
 222  */
 223 void WINAPI SysFreeString16(BSTR16 in)
 224 {
 225         BSTR_Free(in);
 226 }
 227
 228 /******************************************************************************
 229  *              SysFreeString32 [OLEAUT32.6]
 230  */
 231 void WINAPI SysFreeString32(BSTR32 in)
 232 {
 233     DWORD* bufferPointer;
 234
 235     /*
 236      * We have to be careful when we free a BSTR pointer, it points to
 237      * the beginning of the string but it skips the byte count contained
 238      * before the string.
 239      */
 240     bufferPointer = (DWORD*)in;
 241
 242     bufferPointer--;
 243
 244     /*
 245      * Free the memory from it's "real" origin.
 246      */
 247     HeapFree(GetProcessHeap(), 0, bufferPointer);
 248 }
 249
 250 /******************************************************************************
 251  *              SysStringLen16  [OLE2DISP.7]
 252  */
 253 int WINAPI SysStringLen16(BSTR16 str)
 254 {
 255         return strlen(BSTR_GetAddr(str));
 256 }
 257
 258 /******************************************************************************
 259  *             SysStringLen32  [OLEAUT32.7]
 260  *
 261  * The Windows documentation states that the length returned by this function
 262  * is not necessarely the same as the length returned by the _lstrlenW method.
 263  * It is the same number that was passed in as the "len" parameter if the
 264  * string was allocated with a SysAllocStringLen method call.
 265  */
 266 int WINAPI SysStringLen32(BSTR32 str)
 267 {
 268     DWORD* bufferPointer;
 269
 270     /*
 271      * The length of the string (in bytes) is contained in a DWORD placed
 272      * just before the BSTR pointer
 273      */
 274     bufferPointer = (DWORD*)str;
 275
 276     bufferPointer--;
 277
 278     return (int)(*bufferPointer/sizeof(WCHAR));
 279 }
 280
 281 /******************************************************************************
 282  *             SysStringByteLen  [OLEAUT32.149]
 283  *
 284  * The Windows documentation states that the length returned by this function
 285  * is not necessarely the same as the length returned by the _lstrlenW method.
 286  * It is the same number that was passed in as the "len" parameter if the
 287  * string was allocated with a SysAllocStringLen method call.
 288  */
 289 int WINAPI SysStringByteLen(BSTR32 str)
 290 {
 291   return SysStringLen32(str)*sizeof(WCHAR);
 292 }
 293
 294 /******************************************************************************
 295  * CreateDispTypeInfo [OLE2DISP.31]
 296  */
 297 OLESTATUS WINAPI CreateDispTypeInfo(
 298         INTERFACEDATA *pidata,
 299         LCID lcid,
 300         LPVOID **pptinfo /*ITypeInfo*/
 301 ) {
 302         FIXME(ole,"(%p,%ld,%p),stub\n",pidata,lcid,pptinfo);
 303         return 0;
 304 }
 305
 306 /******************************************************************************
 307  * RegisterActiveObject [OLE2DISP.35]
 308  */
 309 OLESTATUS WINAPI RegisterActiveObject(
 310         IUnknown * punk,REFCLSID rclsid,DWORD dwFlags, DWORD * pdwRegister
 311 ) {
 312         char    buf[80];
 313         WINE_StringFromCLSID(rclsid,buf);
 314         FIXME(ole,"(%p,%s,0x%08lx,%p):stub\n",punk,buf,dwFlags,pdwRegister);
 315         return 0;
 316 }
 317
 318 /******************************************************************************
 319  *              OleTranslateColor       [OLEAUT32.421]
 320  */
 321 INT32 WINAPI OleTranslateColor(
 322   LONG clr,
 323   HPALETTE32  hpal,
 324   COLORREF* pColorRef)
 325 {
 326   FIXME(ole,"():stub\n");
 327
 328   *pColorRef = clr;
 329
 330   return S_OK;
 331 }
 332
 333
 334
 335