//+---------------------------------------------------------------------------
//
// Microsoft Windows
// Copyright (C) Microsoft Corporation, 1993 - 1993.
//
// File: ccompapi.cxx
//
// Contents: common compobj API Worker routines used by com, stg, scm etc
//
// Classes:
//
// Functions:
//
// History: 31-Dec-93 ErikGav Chicago port
//
//----------------------------------------------------------------------------
#include <windows.h>
#include <ole2sp.h>
#include <ole2com.h>
#include <olesem.hxx>
NAME_SEG(CompApi)
ASSERTDATA
static const BYTE GuidMap[] = { 3, 2, 1, 0, '-', 5, 4, '-', 7, 6, '-',
8, 9, '-', 10, 11, 12, 13, 14, 15};
static const WCHAR wszDigits[] = L"0123456789ABCDEF";
LPVOID WINAPI PrivHeapAlloc(HANDLE hHeap, DWORD dwFlags, SIZE_T dwBytes);
BOOL WINAPI PrivHeapFree (HANDLE hHeap, DWORD dwFlags, LPVOID lpMem);
HANDLE g_hHeap = 0;
HEAP_ALLOC_ROUTINE *pfnHeapAlloc = PrivHeapAlloc;
HEAP_FREE_ROUTINE *pfnHeapFree = PrivHeapFree;
//+-------------------------------------------------------------------------
//
// Function: PrivHeapAlloc (internal)
//
// Synopsis: Allocate memory from the heap.
//
// Notes: This function handles the first call to PrivMemAlloc.
// This function changes pfnHeapAlloc so that subsequent calls
// to PrivMemAlloc will go directly to HeapAlloc.
//
//--------------------------------------------------------------------------
LPVOID WINAPI PrivHeapAlloc(HANDLE hHeap, DWORD dwFlags, SIZE_T dwBytes)
{
// Fault in g_hHeap if it's not initialized already via MallocInitialize
if (g_hHeap == NULL)
{
g_hHeap = GetProcessHeap();
if (g_hHeap == NULL)
{
return NULL;
}
}
pfnHeapFree = HeapFree;
pfnHeapAlloc = HeapAlloc;
return HeapAlloc(g_hHeap, dwFlags, dwBytes);
}
//+-------------------------------------------------------------------------
//
// Function: PrivHeapFree (internal)
//
// Synopsis: Free memory from the heap.
//
// Notes: lpMem should always be zero. We assume that memory
// freed via PrivMemFree has been allocated via PrivMemAlloc.
// The first call to PrivMemAlloc changes pfnHeapFree.
// Subsequent calls to PrivMemFree go directly to HeapFree.
// Therefore PrivHeapFree should never be called with a
// non-zero lpMem.
//
//--------------------------------------------------------------------------
BOOL WINAPI PrivHeapFree (HANDLE hHeap, DWORD dwFlags, LPVOID lpMem)
{
Win4Assert(lpMem == 0 && "PrivMemFree requires PrivMemAlloc.");
return FALSE;
}
//+-------------------------------------------------------------------------
//
// Function: wStringFromUUID (internal)
//
// Synopsis: converts UUID into xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
//
// Arguments: [rguid] - the guid to convert
// [lpszy] - buffer to hold the results
//
// Returns: Number of characters copied to the buffer.
//
//--------------------------------------------------------------------------
INTERNAL wStringFromUUID(REFGUID rguid, LPWSTR lpsz)
{
int i;
LPWSTR p = lpsz;
const BYTE * pBytes = (const BYTE *) &rguid;
for (i = 0; i < sizeof(GuidMap); i++)
{
if (GuidMap[i] == '-')
{
*p++ = L'-';
}
else
{
*p++ = wszDigits[ (pBytes[GuidMap[i]] & 0xF0) >> 4 ];
*p++ = wszDigits[ (pBytes[GuidMap[i]] & 0x0F) ];
}
}
*p = L'\0';
return S_OK;
}
//+-------------------------------------------------------------------------
//
// Function: HexStringToDword (private)
//
// Synopsis: scan lpsz for a number of hex digits (at most 8); update lpsz
// return value in Value; check for chDelim;
//
// Arguments: [lpsz] - the hex string to convert
// [Value] - the returned value
// [cDigits] - count of digits
//
// Returns: TRUE for success
//
//--------------------------------------------------------------------------
static BOOL HexStringToDword(LPCWSTR FAR& lpsz, DWORD FAR& Value,
int cDigits, WCHAR chDelim)
{
int Count;
Value = 0;
for (Count = 0; Count < cDigits; Count++, lpsz++)
{
if (*lpsz >= '0' && *lpsz <= '9')
Value = (Value << 4) + *lpsz - '0';
else if (*lpsz >= 'A' && *lpsz <= 'F')
Value = (Value << 4) + *lpsz - 'A' + 10;
else if (*lpsz >= 'a' && *lpsz <= 'f')
Value = (Value << 4) + *lpsz - 'a' + 10;
else
return(FALSE);
}
if (chDelim != 0)
return *lpsz++ == chDelim;
else
return TRUE;
}
//+-------------------------------------------------------------------------
//
// Function: wUUIDFromString (internal)
//
// Synopsis: Parse UUID such as 00000000-0000-0000-0000-000000000000
//
// Arguments: [lpsz] - Supplies the UUID string to convert
// [pguid] - Returns the GUID.
//
// Returns: TRUE if successful
//
//--------------------------------------------------------------------------
INTERNAL_(BOOL) wUUIDFromString(LPCWSTR lpsz, LPGUID pguid)
{
DWORD dw;
if (!HexStringToDword(lpsz, pguid->Data1, sizeof(DWORD)*2, '-'))
return FALSE;
if (!HexStringToDword(lpsz, dw, sizeof(WORD)*2, '-'))
return FALSE;
pguid->Data2 = (WORD)dw;
if (!HexStringToDword(lpsz, dw, sizeof(WORD)*2, '-'))
return FALSE;
pguid->Data3 = (WORD)dw;
if (!HexStringToDword(lpsz, dw, sizeof(BYTE)*2, 0))
return FALSE;
pguid->Data4[0] = (BYTE)dw;
if (!HexStringToDword(lpsz, dw, sizeof(BYTE)*2, '-'))
return FALSE;
pguid->Data4[1] = (BYTE)dw;
if (!HexStringToDword(lpsz, dw, sizeof(BYTE)*2, 0))
return FALSE;
pguid->Data4[2] = (BYTE)dw;
if (!HexStringToDword(lpsz, dw, sizeof(BYTE)*2, 0))
return FALSE;
pguid->Data4[3] = (BYTE)dw;
if (!HexStringToDword(lpsz, dw, sizeof(BYTE)*2, 0))
return FALSE;
pguid->Data4[4] = (BYTE)dw;
if (!HexStringToDword(lpsz, dw, sizeof(BYTE)*2, 0))
return FALSE;
pguid->Data4[5] = (BYTE)dw;
if (!HexStringToDword(lpsz, dw, sizeof(BYTE)*2, 0))
return FALSE;
pguid->Data4[6] = (BYTE)dw;
if (!HexStringToDword(lpsz, dw, sizeof(BYTE)*2, 0))
return FALSE;
pguid->Data4[7] = (BYTE)dw;
return TRUE;
}
//+-------------------------------------------------------------------------
//
// Function: wGUIDFromString (internal)
//
// Synopsis: Parse GUID such as {00000000-0000-0000-0000-000000000000}
//
// Arguments: [lpsz] - the guid string to convert
// [pguid] - guid to return
//
// Returns: TRUE if successful
//
// CODEWORK: these are common with com\class\compapi.cxx ..
//
//--------------------------------------------------------------------------
INTERNAL_(BOOL) wGUIDFromString(LPCWSTR lpsz, LPGUID pguid)
{
DWORD dw;
if (*lpsz++ != '{' )
return FALSE;
if (wUUIDFromString(lpsz, pguid) != TRUE)
return FALSE;
lpsz +=36;
if (*lpsz++ != '}' )
return FALSE;
if (*lpsz != '\0') // check for zero terminated string - test bug #18307
{
return FALSE;
}
return TRUE;
}
//+-------------------------------------------------------------------------
//
// Function: wStringFromGUID2 (internal)
//
// Synopsis: converts GUID into {...} form without leading identifier;
//
// Arguments: [rguid] - the guid to convert
// [lpszy] - buffer to hold the results
// [cbMax] - sizeof the buffer
//
// Returns: amount of data copied to lpsz if successful
// 0 if buffer too small.
//
//--------------------------------------------------------------------------
INTERNAL_(int) wStringFromGUID2(REFGUID rguid, LPWSTR lpsz, int cbMax)
{
int i;
LPWSTR p = lpsz;
if (cbMax < GUIDSTR_MAX)
return 0;
*p++ = L'{';
wStringFromUUID(rguid, p);
p += 36;
*p++ = L'}';
*p = L'\0';
return GUIDSTR_MAX;
}
static const CHAR szDigits[] = "0123456789ABCDEF";
//+-------------------------------------------------------------------------
//
// Function: wStringFromGUID2A (internal)
//
// Synopsis: Ansi version of wStringFromGUID2 (for Win95 Optimizations)
//
// Arguments: [rguid] - the guid to convert
// [lpszy] - buffer to hold the results
// [cbMax] - sizeof the buffer
//
// Returns: amount of data copied to lpsz if successful
// 0 if buffer too small.
//
//--------------------------------------------------------------------------
INTERNAL_(int) wStringFromGUID2A(REFGUID rguid, LPSTR lpsz, int cbMax) // internal
{
int i;
LPSTR p = lpsz;
const BYTE * pBytes = (const BYTE *) &rguid;
*p++ = '{';
for (i = 0; i < sizeof(GuidMap); i++)
{
if (GuidMap[i] == '-')
{
*p++ = '-';
}
else
{
*p++ = szDigits[ (pBytes[GuidMap[i]] & 0xF0) >> 4 ];
*p++ = szDigits[ (pBytes[GuidMap[i]] & 0x0F) ];
}
}
*p++ = '}';
*p = '\0';
return GUIDSTR_MAX;
}
//+---------------------------------------------------------------------------
//
// Function: FormatHexNumA
//
// Synopsis: Given a value, and a count of characters, translate
// the value into a hex string. This is the ANSI version
//
// Arguments: [ulValue] -- Value to convert
// [chChars] -- Number of characters to format
// [pchStr] -- Pointer to output buffer
//
// Requires: pwcStr must be valid for chChars
//
// History: 12-Dec-95 KevinRo Created
//
// Notes:
//
//----------------------------------------------------------------------------
void FormatHexNumA( unsigned long ulValue, unsigned long chChars, char *pchStr)
{
while (chChars--)
{
pchStr[chChars] = (char) szDigits[ulValue & 0xF];
ulValue = ulValue >> 4;
}
}
//+---------------------------------------------------------------------------
//
// Function: FormatHexNumW
//
// Synopsis: Given a value, and a count of characters, translate
// the value into a hex string. This is the WCHAR version
//
// Arguments: [ulValue] -- Value to convert
// [chChars] -- Number of characters to format
// [pwcStr] -- Pointer to output buffer
//
// Requires: pwcStr must be valid for chChars
//
// History: 12-Dec-95 KevinRo Created
//
// Notes:
//
//----------------------------------------------------------------------------
void FormatHexNumW( unsigned long ulValue, unsigned long chChars, WCHAR *pwcStr)
{
while (chChars--)
{
pwcStr[chChars] = (char) wszDigits[ulValue & 0xF];
ulValue = ulValue >> 4;
}
}