251 lines
6.8 KiB
C++
251 lines
6.8 KiB
C++
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1993 - 1993.
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//
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// File: ccompapi.cxx
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//
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// Contents: common compobj API Worker routines used by com, stg, scm etc
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//
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// Classes:
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//
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// Functions:
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//
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// History: 31-Dec-93 ErikGav Chicago port
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//
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//----------------------------------------------------------------------------
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#include <windows.h>
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#include <ole2sp.h>
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#include <ole2com.h>
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NAME_SEG(CompApi)
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ASSERTDATA
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static const BYTE GuidMap[] = { 3, 2, 1, 0, '-', 5, 4, '-', 7, 6, '-',
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8, 9, '-', 10, 11, 12, 13, 14, 15 };
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static const WCHAR wszDigits[] = L"0123456789ABCDEF";
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LPVOID WINAPI PrivHeapAlloc(HANDLE hHeap, DWORD dwFlags, DWORD dwBytes);
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BOOL WINAPI PrivHeapFree (HANDLE hHeap, DWORD dwFlags, LPVOID lpMem);
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HANDLE g_hHeap = 0;
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HEAP_ALLOC_ROUTINE *pfnHeapAlloc = PrivHeapAlloc;
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HEAP_FREE_ROUTINE *pfnHeapFree = PrivHeapFree;
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//+-------------------------------------------------------------------------
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//
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// Function: PrivHeapAlloc (internal)
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//
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// Synopsis: Allocate memory from the heap.
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//
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// Notes: This function handles the first call to PrivMemAlloc.
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// This function changes pfnHeapAlloc so that subsequent calls
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// to PrivMemAlloc will go directly to HeapAlloc.
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//
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//--------------------------------------------------------------------------
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LPVOID WINAPI PrivHeapAlloc(HANDLE hHeap, DWORD dwFlags, DWORD dwBytes)
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{
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g_hHeap = GetProcessHeap();
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//GetProcessHeap should never fail.
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Win4Assert(g_hHeap != 0 && "GetProcessHeap failed");
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pfnHeapFree = HeapFree;
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pfnHeapAlloc = HeapAlloc;
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return HeapAlloc(g_hHeap, dwFlags, dwBytes);
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}
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//+-------------------------------------------------------------------------
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//
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// Function: PrivHeapFree (internal)
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//
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// Synopsis: Free memory from the heap.
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//
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// Notes: lpMem should always be zero. We assume that memory
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// freed via PrivMemFree has been allocated via PrivMemAlloc.
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// The first call to PrivMemAlloc changes pfnHeapFree.
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// Subsequent calls to PrivMemFree go directly to HeapFree.
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// Therefore PrivHeapFree should never be called with a
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// non-zero lpMem.
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//
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//--------------------------------------------------------------------------
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BOOL WINAPI PrivHeapFree (HANDLE hHeap, DWORD dwFlags, LPVOID lpMem)
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{
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Win4Assert(lpMem == 0 && "PrivMemFree requires PrivMemAlloc.");
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return FALSE;
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}
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//+-------------------------------------------------------------------------
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//
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// Function: wStringFromUUID (internal)
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//
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// Synopsis: converts UUID into xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
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//
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// Arguments: [rguid] - the guid to convert
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// [lpszy] - buffer to hold the results
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//
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// Returns: Number of characters copied to the buffer.
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//
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//--------------------------------------------------------------------------
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INTERNAL wStringFromUUID(REFGUID rguid, LPWSTR lpsz)
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{
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int i;
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LPWSTR p = lpsz;
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const BYTE * pBytes = (const BYTE *) &rguid;
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for (i = 0; i < sizeof(GuidMap); i++)
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{
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if (GuidMap[i] == '-')
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{
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*p++ = L'-';
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}
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else
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{
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*p++ = wszDigits[ (pBytes[GuidMap[i]] & 0xF0) >> 4 ];
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*p++ = wszDigits[ (pBytes[GuidMap[i]] & 0x0F) ];
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}
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}
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*p = L'\0';
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return S_OK;
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}
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//+-------------------------------------------------------------------------
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//
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// Function: wStringFromGUID2 (internal)
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//
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// Synopsis: converts GUID into {...} form without leading identifier;
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//
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// Arguments: [rguid] - the guid to convert
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// [lpszy] - buffer to hold the results
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// [cbMax] - sizeof the buffer
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//
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// Returns: amount of data copied to lpsz if successful
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// 0 if buffer too small.
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//
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//--------------------------------------------------------------------------
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INTERNAL_(int) wStringFromGUID2(REFGUID rguid, LPWSTR lpsz, int cbMax)
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{
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int i;
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LPWSTR p = lpsz;
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if(cbMax < GUIDSTR_MAX)
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return 0;
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*p++ = L'{';
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wStringFromUUID(rguid, p);
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p += 36;
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*p++ = L'}';
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*p = L'\0';
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return GUIDSTR_MAX;
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}
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static const CHAR szDigits[] = "0123456789ABCDEF";
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//+-------------------------------------------------------------------------
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//
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// Function: wStringFromGUID2A (internal)
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//
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// Synopsis: Ansi version of wStringFromGUID2 (for Win95 Optimizations)
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//
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// Arguments: [rguid] - the guid to convert
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// [lpszy] - buffer to hold the results
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// [cbMax] - sizeof the buffer
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//
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// Returns: amount of data copied to lpsz if successful
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// 0 if buffer too small.
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//
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//--------------------------------------------------------------------------
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INTERNAL_(int) wStringFromGUID2A(REFGUID rguid, LPSTR lpsz, int cbMax) // internal
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{
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int i;
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LPSTR p = lpsz;
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const BYTE * pBytes = (const BYTE *) &rguid;
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*p++ = '{';
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for (i = 0; i < sizeof(GuidMap); i++)
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{
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if (GuidMap[i] == '-')
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{
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*p++ = '-';
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}
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else
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{
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*p++ = szDigits[ (pBytes[GuidMap[i]] & 0xF0) >> 4 ];
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*p++ = szDigits[ (pBytes[GuidMap[i]] & 0x0F) ];
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}
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}
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*p++ = '}';
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*p = '\0';
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return GUIDSTR_MAX;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: FormatHexNumA
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//
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// Synopsis: Given a value, and a count of characters, translate
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// the value into a hex string. This is the ANSI version
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//
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// Arguments: [ulValue] -- Value to convert
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// [chChars] -- Number of characters to format
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// [pchStr] -- Pointer to output buffer
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//
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// Requires: pwcStr must be valid for chChars
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//
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// History: 12-Dec-95 KevinRo Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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void FormatHexNumA( unsigned long ulValue, unsigned long chChars, char *pchStr)
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{
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while(chChars--)
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{
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pchStr[chChars] = (char) szDigits[ulValue & 0xF];
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ulValue = ulValue >> 4;
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}
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}
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//+---------------------------------------------------------------------------
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//
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// Function: FormatHexNumW
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//
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// Synopsis: Given a value, and a count of characters, translate
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// the value into a hex string. This is the WCHAR version
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//
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// Arguments: [ulValue] -- Value to convert
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// [chChars] -- Number of characters to format
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// [pwcStr] -- Pointer to output buffer
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//
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// Requires: pwcStr must be valid for chChars
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//
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// History: 12-Dec-95 KevinRo Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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void FormatHexNumW( unsigned long ulValue, unsigned long chChars, WCHAR *pwcStr)
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{
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while(chChars--)
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{
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pwcStr[chChars] = (char) wszDigits[ulValue & 0xF];
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ulValue = ulValue >> 4;
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}
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}
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