blob: 13a89d87fc2e2e7f47291dfd4e54543a24e34df3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#ifndef _StringCopyHolder_h_
#define _StringCopyHolder_h_
//-----------------------------------------------------------------------------
// Simple holder to keep a copy of a string.
// Implements IStringHolder so we can pass instances through IDacDbiInterface
// and have it fill in the contents.
//-----------------------------------------------------------------------------
class StringCopyHolder : public IDacDbiInterface::IStringHolder
{
public:
StringCopyHolder();
// Free the memory allocated for the string contents
~StringCopyHolder();
// Make a copy of the provided null-terminated unicode string
virtual HRESULT AssignCopy(const WCHAR * pCopy);
// Reset the string to NULL and free memory
void Clear();
// Returns true if the string has been set to a non-NULL value
bool IsSet()
{
return (m_szData != NULL);
}
// Returns true if an empty string is stored. IsSet must be true to call this.
bool IsEmpty()
{
_ASSERTE(m_szData != NULL);
return m_szData[0] == W('\0');
}
// Returns the pointer to the string contents
operator WCHAR* () const
{
return m_szData;
}
private:
// Disallow copying (to prevent double-free) - no implementation
StringCopyHolder( const StringCopyHolder& rhs );
StringCopyHolder& operator=( const StringCopyHolder& rhs );
WCHAR * m_szData;
};
#endif // StringCopyHolder
|
