| 1 | // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. |
| 2 | |
| 3 | #include "precomp.h" |
| 4 | |
| 5 | |
| 6 | // Exit macros |
| 7 | #define EnvExitOnLastError(x, s, ...) ExitOnLastErrorSource(DUTIL_SOURCE_ENVUTIL, x, s, __VA_ARGS__) |
| 8 | #define EnvExitOnLastErrorDebugTrace(x, s, ...) ExitOnLastErrorDebugTraceSource(DUTIL_SOURCE_ENVUTIL, x, s, __VA_ARGS__) |
| 9 | #define EnvExitWithLastError(x, s, ...) ExitWithLastErrorSource(DUTIL_SOURCE_ENVUTIL, x, s, __VA_ARGS__) |
| 10 | #define EnvExitOnFailure(x, s, ...) ExitOnFailureSource(DUTIL_SOURCE_ENVUTIL, x, s, __VA_ARGS__) |
| 11 | #define EnvExitOnRootFailure(x, s, ...) ExitOnRootFailureSource(DUTIL_SOURCE_ENVUTIL, x, s, __VA_ARGS__) |
| 12 | #define EnvExitWithRootFailure(x, e, s, ...) ExitWithRootFailureSource(DUTIL_SOURCE_ENVUTIL, x, e, s, __VA_ARGS__) |
| 13 | #define EnvExitOnFailureDebugTrace(x, s, ...) ExitOnFailureDebugTraceSource(DUTIL_SOURCE_ENVUTIL, x, s, __VA_ARGS__) |
| 14 | #define EnvExitOnNull(p, x, e, s, ...) ExitOnNullSource(DUTIL_SOURCE_ENVUTIL, p, x, e, s, __VA_ARGS__) |
| 15 | #define EnvExitOnNullWithLastError(p, x, s, ...) ExitOnNullWithLastErrorSource(DUTIL_SOURCE_ENVUTIL, p, x, s, __VA_ARGS__) |
| 16 | #define EnvExitOnNullDebugTrace(p, x, e, s, ...) ExitOnNullDebugTraceSource(DUTIL_SOURCE_ENVUTIL, p, x, e, s, __VA_ARGS__) |
| 17 | #define EnvExitOnInvalidHandleWithLastError(p, x, s, ...) ExitOnInvalidHandleWithLastErrorSource(DUTIL_SOURCE_ENVUTIL, p, x, s, __VA_ARGS__) |
| 18 | #define EnvExitOnWin32Error(e, x, s, ...) ExitOnWin32ErrorSource(DUTIL_SOURCE_ENVUTIL, e, x, s, __VA_ARGS__) |
| 19 | #define EnvExitOnGdipFailure(g, x, s, ...) ExitOnGdipFailureSource(DUTIL_SOURCE_ENVUTIL, g, x, s, __VA_ARGS__) |
| 20 | |
| 21 | #define ENV_GOOD_ENOUGH 64 |
| 22 | |
| 23 | DAPI_(HRESULT) EnvExpandEnvironmentStrings( |
| 24 | __in LPCWSTR wzSource, |
| 25 | __out LPWSTR* psczExpanded, |
| 26 | __out_opt SIZE_T* pcchExpanded |
| 27 | ) |
| 28 | { |
| 29 | HRESULT hr = S_OK; |
| 30 | DWORD cch = 0; |
| 31 | DWORD cchExpanded = 0; |
| 32 | SIZE_T cchMax = 0; |
| 33 | |
| 34 | if (*psczExpanded) |
| 35 | { |
| 36 | hr = StrMaxLength(*psczExpanded, &cchMax); |
| 37 | EnvExitOnFailure(hr, "Failed to get max length of input buffer."); |
| 38 | |
| 39 | cchExpanded = (DWORD)min(DWORD_MAX, cchMax); |
| 40 | } |
| 41 | else |
| 42 | { |
| 43 | cchExpanded = ENV_GOOD_ENOUGH; |
| 44 | |
| 45 | hr = StrAlloc(psczExpanded, cchExpanded); |
| 46 | EnvExitOnFailure(hr, "Failed to allocate space for expanded path."); |
| 47 | } |
| 48 | |
| 49 | cch = ::ExpandEnvironmentStringsW(wzSource, *psczExpanded, cchExpanded); |
| 50 | if (!cch) |
| 51 | { |
| 52 | EnvExitWithLastError(hr, "Failed to expand environment variables in string: %ls", wzSource); |
| 53 | } |
| 54 | else if (cchExpanded < cch) |
| 55 | { |
| 56 | cchExpanded = cch; |
| 57 | hr = StrAlloc(psczExpanded, cchExpanded); |
| 58 | EnvExitOnFailure(hr, "Failed to re-allocate more space for expanded path."); |
| 59 | |
| 60 | cch = ::ExpandEnvironmentStringsW(wzSource, *psczExpanded, cchExpanded); |
| 61 | if (!cch) |
| 62 | { |
| 63 | EnvExitWithLastError(hr, "Failed to expand environment variables in string: %ls", wzSource); |
| 64 | } |
| 65 | else if (cchExpanded < cch) |
| 66 | { |
| 67 | EnvExitWithRootFailure(hr, HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER), "Failed to allocate buffer for expanded string."); |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | if (pcchExpanded) |
| 72 | { |
| 73 | *pcchExpanded = cch; |
| 74 | } |
| 75 | |
| 76 | LExit: |
| 77 | return hr; |
| 78 | } |