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87 lines
3.0 KiB
87 lines
3.0 KiB
/****************************************************************************/
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/* */
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/* enpenv.c - */
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/* */
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/* Routines for expanding environment strings */
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/* */
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/****************************************************************************/
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#include "shellprv.h"
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//-------------------------------------------------------------------------
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// The given string is parsed and all environment variables
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// are expanded. If the expansion doesn't over fill the buffer
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// then the length of the new string will be returned in the
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// hiword and TRUE in the low word. If the expansion would over
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// fill the buffer then the original string is left unexpanded,
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// the original length in the high word and FALSE in the low word.
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// The length of the string is in bytes and excludes the terminating
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// NULL.
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//
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// NOTE 1: This function must now handle environment variables in Quotes
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//
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// NOTE 2: There is no need for this API since NT has the equivalent APIs such
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// as ExpandEnvironmentStrings. But must keep it since it is a public
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// API in Win3.1.
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// Instead of doing all the work here, just call ExpandEnvironmentStrings.
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//-------------------------------------------------------------------------
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DWORD APIENTRY DoEnvironmentSubstA(
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LPSTR pszSrc, // The input string.
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UINT cchSrc) // The limit of characters in the input string inc null.
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{
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LPSTR pszExp;
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DWORD cchExp;
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BOOL fRet = FALSE;
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pszExp = (LPSTR)LocalAlloc(LPTR, cchSrc);
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if (pszExp)
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{
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cchExp = SHExpandEnvironmentStringsA(pszSrc, pszExp, cchSrc);
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if (cchExp)
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{
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HRESULT hr = StringCchCopyA(pszSrc, cchSrc, pszExp);
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if (SUCCEEDED(hr))
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{
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fRet = TRUE;
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}
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}
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LocalFree(pszExp);
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}
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if (fRet)
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return MAKELONG(cchExp,TRUE);
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else
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return MAKELONG(cchSrc,FALSE);
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}
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#ifdef UNICODE // on Win9x platform, shlunimp.c provides the implementation
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DWORD APIENTRY DoEnvironmentSubstW(
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LPWSTR pszSrc, // The input string.
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UINT cchSrc) // The limit of characters in the input string inc null.
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{
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LPWSTR pszExp;
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DWORD cchExp;
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BOOL fRet = FALSE;
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pszExp = (LPWSTR)LocalAlloc(LPTR, cchSrc * sizeof(WCHAR));
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if (pszExp)
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{
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cchExp = SHExpandEnvironmentStringsW(pszSrc, pszExp, cchSrc);
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if (cchExp)
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{
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HRESULT hr = StringCchCopyW(pszSrc, cchSrc, pszExp);
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if (SUCCEEDED(hr))
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{
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fRet = TRUE;
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}
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}
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LocalFree(pszExp);
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}
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if (fRet)
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return MAKELONG(cchExp,TRUE);
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else
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return MAKELONG(cchSrc,FALSE);
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}
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#endif
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