145 lines
5.1 KiB
C++
145 lines
5.1 KiB
C++
// Copyright (c) 2000 Microsoft Corporation. All rights reserved.
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//
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// Implementation of PackExceptionFileAndLine and UnpackExceptionFileAndLine.
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//
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#include "stdinc.h"
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#include "packexception.h"
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#include "oleaut.h"
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const WCHAR g_wszDescriptionFileSeparator[] = L"»"; // magic character for separating the filename, line, and description
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const WCHAR g_wchDescriptionFileSeparator = g_wszDescriptionFileSeparator[0];
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void SeparateDescriptionFileAndLine(BSTR bstrDescription, const WCHAR **ppwszFilename, const WCHAR **ppwszLine, const WCHAR **ppwszDescription)
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{
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assert(bstrDescription && ppwszFilename && ppwszLine && ppwszDescription);
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// if there aren't any packed fields, the whole thing is the description
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*ppwszDescription = bstrDescription;
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WCHAR *pwszLine = wcsstr(bstrDescription, g_wszDescriptionFileSeparator);
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if (!pwszLine)
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return;
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WCHAR *pwszDescription = wcsstr(pwszLine + 1, g_wszDescriptionFileSeparator);
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if (!pwszDescription)
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return;
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// String looks like this:
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// MyScript.spt»23»Description of the error
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// pExcepInfo->bstrDescription-^ pwszLine-^ ^-pwszDescription
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*ppwszFilename = bstrDescription;
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assert(*pwszLine == g_wchDescriptionFileSeparator);
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*ppwszLine = pwszLine + 1;
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assert(*pwszDescription == g_wchDescriptionFileSeparator);
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*ppwszDescription = pwszDescription + 1;
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}
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bool wcsIsBlankTillSeparator(const WCHAR *pwsz)
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{
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return !pwsz[0] || pwsz[0] == g_wchDescriptionFileSeparator;
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}
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void wcscpyTillSeparator(WCHAR *pwszDestination, const WCHAR *pwszSource)
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{
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assert(pwszDestination && pwszSource);
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while (!wcsIsBlankTillSeparator(pwszSource))
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{
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*pwszDestination++ = *pwszSource++;
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}
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*pwszDestination = L'\0';
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}
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void wcscatTillSeparator(WCHAR *pwszDestination, const WCHAR *pwszSource)
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{
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assert(pwszDestination && pwszSource);
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while (*pwszDestination != L'\0')
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++pwszDestination;
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wcscpyTillSeparator(pwszDestination, pwszSource);
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}
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void PackExceptionFileAndLine(bool fUseOleAut, EXCEPINFO *pExcepInfo, const WCHAR *pwszFilename, const ULONG *pulLine)
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{
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if (!pExcepInfo || !pExcepInfo->bstrDescription)
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return;
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const WCHAR *pwszDescrFilename = L"";
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const WCHAR *pwszDescrLine = L"";
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const WCHAR *pwszDescrDescription = L"";
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SeparateDescriptionFileAndLine(pExcepInfo->bstrDescription, &pwszDescrFilename, &pwszDescrLine, &pwszDescrDescription);
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if (wcsIsBlankTillSeparator(pwszDescrFilename) && pwszFilename)
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{
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// Filename is blank. Use the specified filename.
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pwszDescrFilename = pwszFilename;
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}
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// MSDN documentation for _ultow says max is 33 characters, but PREFIX complains if the length
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// is less than 40.
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WCHAR wszLineBuffer[40] = L"";
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if (wcsIsBlankTillSeparator(pwszDescrLine) && pulLine)
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{
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// Line is blank. Use the specified line.
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_ultow(*pulLine, wszLineBuffer, 10);
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pwszDescrLine = wszLineBuffer;
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}
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WCHAR *pwszNewDescription = new WCHAR[wcslen(pwszDescrFilename) + wcslen(pwszDescrLine) + wcslen(pwszDescrDescription) + (wcslen(g_wszDescriptionFileSeparator) * 2 + 1)];
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if (pwszNewDescription)
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{
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wcscpyTillSeparator(pwszNewDescription, pwszDescrFilename);
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wcscat(pwszNewDescription, g_wszDescriptionFileSeparator);
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wcscatTillSeparator(pwszNewDescription, pwszDescrLine);
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wcscat(pwszNewDescription, g_wszDescriptionFileSeparator);
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wcscat(pwszNewDescription, pwszDescrDescription);
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DMS_SysFreeString(fUseOleAut, pExcepInfo->bstrDescription);
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pExcepInfo->bstrDescription = DMS_SysAllocString(fUseOleAut, pwszNewDescription);
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delete[] pwszNewDescription;
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}
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}
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void UnpackExceptionFileAndLine(BSTR bstrDescription, DMUS_SCRIPT_ERRORINFO *pErrorInfo)
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{
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assert(pErrorInfo && bstrDescription);
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if (pErrorInfo && bstrDescription)
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{
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const WCHAR *pwszDescrFilename = L"";
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const WCHAR *pwszDescrLine = L"";
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const WCHAR *pwszDescrDescription = L"";
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SeparateDescriptionFileAndLine(bstrDescription, &pwszDescrFilename, &pwszDescrLine, &pwszDescrDescription);
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// String looks like this:
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// CoolScriptFile.spt»23»Description of the error
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// pwszDescrFilename-^ pwszDescrLine-^ ^-pwszDescrDescription
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// Except that if these weren't found then they point to a separate empty string.
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if (!wcsIsBlankTillSeparator(pwszDescrFilename))
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{
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// Filename is present. Copy to pErrorInfo.
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assert(*(pwszDescrLine - 1) == g_wchDescriptionFileSeparator);
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wcsTruncatedCopy(pErrorInfo->wszSourceFile,
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pwszDescrFilename,
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std::_MIN<UINT>(DMUS_MAX_FILENAME, pwszDescrLine - pwszDescrFilename));
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}
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if (!wcsIsBlankTillSeparator(pwszDescrLine))
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{
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// Line is present. Copy to pErrorInfo.
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WCHAR *pwszLineSeparator = const_cast<WCHAR *>(pwszDescrDescription - 1);
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assert(*pwszLineSeparator == g_wchDescriptionFileSeparator);
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*pwszLineSeparator = L'\0'; // terminate the line for wcstoul
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pErrorInfo->ulLineNumber = wcstoul(pwszDescrLine, NULL, 10);
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*pwszLineSeparator = g_wchDescriptionFileSeparator; // restore the separator
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}
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// Always copy the description
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wcsTruncatedCopy(pErrorInfo->wszDescription, pwszDescrDescription, DMUS_MAX_FILENAME);
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}
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}
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