initial custom action library, "hello, world" quality

src/installer-ca/dutil/strutil.h

Index: src/installer-ca/dutil/strutil.h
===================================================================
new file mode 100644
--- /dev/null
+++ b/src/installer-ca/dutil/strutil.h
@@ -0,0 +1,123 @@
+#pragma once
+//-------------------------------------------------------------------------------------------------
+// <copyright file="strutil.h" company="Outercurve Foundation">
+//   Copyright (c) 2004, Outercurve Foundation.
+//   This software is released under Microsoft Reciprocal License (MS-RL).
+//   The license and further copyright text can be found in the file
+//   LICENSE.TXT at the root directory of the distribution.
+// </copyright>
+// 
+// <summary>
+//    Header for string helper functions.
+// </summary>
+//-------------------------------------------------------------------------------------------------
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define ReleaseStr(pwz) if (pwz) { StrFree(pwz); }
+#define ReleaseNullStr(pwz) if (pwz) { StrFree(pwz); pwz = NULL; }
+#define ReleaseBSTR(bstr) if (bstr) { ::SysFreeString(bstr); }
+#define ReleaseNullBSTR(bstr) if (bstr) { ::SysFreeString(bstr); bstr = NULL; }
+#define ReleaseStrArray(rg, c) { if (rg) { StrArrayFree(rg, c); } }
+#define ReleaseNullStrArray(rg, c) { if (rg) { StrArrayFree(rg, c); c = 0; rg = NULL; } }
+
+#define DeclareConstBSTR(bstr_const, wz) const WCHAR bstr_const[] = { 0x00, 0x00, sizeof(wz)-sizeof(WCHAR), 0x00, wz }
+#define UseConstBSTR(bstr_const) const_cast<BSTR>(bstr_const + 4)
+
+HRESULT DAPI StrAlloc(
+    __deref_out_ecount_part(cch, 0) LPWSTR* ppwz,
+    __in DWORD_PTR cch
+    );
+HRESULT DAPI StrTrimCapacity(
+    __deref_out_z LPWSTR* ppwz
+    );
+HRESULT DAPI StrTrimWhitespace(
+    __deref_out_z LPWSTR* ppwz,
+    __in_z LPCWSTR wzSource
+    );
+
+HRESULT DAPI StrAllocString(
+    __deref_out_ecount_z(cchSource+1) LPWSTR* ppwz,
+    __in_z LPCWSTR wzSource,
+    __in DWORD_PTR cchSource
+    );
+
+
+HRESULT DAPI StrAllocConcat(
+    __deref_out_z LPWSTR* ppwz,
+    __in_z LPCWSTR wzSource,
+    __in DWORD_PTR cchSource
+    );
+HRESULT __cdecl StrAllocFormatted(
+    __deref_out_z LPWSTR* ppwz,
+    __in __format_string LPCWSTR wzFormat,
+    ...
+    );
+HRESULT DAPI StrAllocFormattedArgs(
+    __deref_out_z LPWSTR* ppwz,
+    __in __format_string LPCWSTR wzFormat,
+    __in va_list args
+    );
+
+HRESULT DAPI StrMaxLength(
+    __in LPCVOID p,
+    __out DWORD_PTR* pcch
+    );
+HRESULT DAPI StrSize(
+    __in LPCVOID p,
+    __out DWORD_PTR* pcb
+    );
+
+HRESULT DAPI StrFree(
+    __in LPVOID p
+    );
+
+
+LPCWSTR wcsistr(
+    __in_z LPCWSTR wzString,
+    __in_z LPCWSTR wzCharSet
+    );
+
+HRESULT DAPI StrStringToInt16(
+    __in_z LPCWSTR wzIn,
+    __in DWORD cchIn,
+    __out SHORT* psOut
+    );
+HRESULT DAPI StrStringToUInt16(
+    __in_z LPCWSTR wzIn,
+    __in DWORD cchIn,
+    __out USHORT* pusOut
+    );
+HRESULT DAPI StrStringToInt32(
+    __in_z LPCWSTR wzIn,
+    __in DWORD cchIn,
+    __out INT* piOut
+    );
+HRESULT DAPI StrStringToUInt32(
+    __in_z LPCWSTR wzIn,
+    __in DWORD cchIn,
+    __out UINT* puiOut
+    );
+HRESULT DAPI StrStringToInt64(
+    __in_z LPCWSTR wzIn,
+    __in DWORD cchIn,
+    __out LONGLONG* pllOut
+    );
+HRESULT DAPI StrStringToUInt64(
+    __in_z LPCWSTR wzIn,
+    __in DWORD cchIn,
+    __out ULONGLONG* pullOut
+    );
+void DAPI StrStringToUpper(
+    __inout_z LPWSTR wzIn
+    );
+void DAPI StrStringToLower(
+    __inout_z LPWSTR wzIn
+    );
+
+
+#ifdef __cplusplus
+}
+#endif