734 lines
22 KiB
C
734 lines
22 KiB
C
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//============================================================================
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//
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// UNICODE and ANSI conversion functions
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//
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//============================================================================
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#include "priv.h"
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#include <mlang.h>
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/*
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* @doc INTERNAL
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*
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* @func int | SHAnsiToUnicodeNativeCP |
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*
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* Convert an ANSI string to a UNICODE string via the
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* specified Windows code page. If the source string is too large
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* for the destination buffer, then as many characters as
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* possible are copied.
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*
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* The resulting output string is always null-terminated.
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*
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* @parm UINT | uiCP |
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*
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* The code page in which to perform the conversion.
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* This must be a Windows code page.
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*
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* @parm LPCSTR | pszSrc |
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*
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* Source buffer containing ANSI string to be converted.
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*
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* @parm int | cchSrc |
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*
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* Source buffer length, including terminating null.
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*
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* @parm LPWSTR | pwszDst |
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*
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* Destination buffer to receive converted UNICODE string.
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*
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* @parm int | cwchBuf |
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*
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* Size of the destination buffer in <t WCHAR>s.
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*
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* @returns
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*
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* On success, the number of characters copied to the output
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* buffer is returned, including the terminating null.
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*/
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int
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SHAnsiToUnicodeNativeCP(UINT uiCP,
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LPCSTR pszSrc, int cchSrc,
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LPWSTR pwszDst, int cwchBuf)
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{
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int cwchRc = 0; /* Assume failure */
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/*
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* Checks the caller should've made.
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*/
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ASSERT(IS_VALID_STRING_PTRA(pszSrc, -1));
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ASSERT(cchSrc == lstrlenA(pszSrc) + 1);
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ASSERT(IS_VALID_WRITE_BUFFER(pwszDst, WCHAR, cwchBuf));
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ASSERT(pszSrc != NULL);
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ASSERT(uiCP != 1200 && uiCP != 65000 && uiCP != 50000 && uiCP != 65001);
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ASSERT(pwszDst);
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ASSERT(cwchBuf);
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cwchRc = MultiByteToWideChar(uiCP, 0, pszSrc, cchSrc, pwszDst, cwchBuf);
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if (cwchRc) {
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/*
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* The output buffer was big enough; no double-buffering
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* needed.
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*/
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} else if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
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/*
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* The output buffer wasn't big enough. Need to double-buffer.
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*/
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int cwchNeeded = MultiByteToWideChar(uiCP, 0, pszSrc, cchSrc,
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NULL, 0);
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ASSERT(cwchRc == 0); /* In case we fail later */
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if (cwchNeeded) {
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LPWSTR pwsz = (LPWSTR)LocalAlloc(LMEM_FIXED,
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cwchNeeded * SIZEOF(WCHAR));
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if (pwsz) {
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cwchRc = MultiByteToWideChar(uiCP, 0, pszSrc, cchSrc,
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pwsz, cwchNeeded);
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if (cwchRc) {
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StrCpyNW(pwszDst, pwsz, cwchBuf);
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cwchRc = cwchBuf;
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}
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LocalFree(pwsz);
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}
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}
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} else {
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/* Possibly unsupported code page */
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ASSERT(!"Unexpected error in MultiByteToWideChar");
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}
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return cwchRc;
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}
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/*
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* @doc INTERNAL
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*
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* @func int | SHAnsiToUnicodeInetCP |
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*
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* Convert an ANSI string to a UNICODE string via the
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* specified Internet code page. If the source string is too large
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* for the destination buffer, then as many characters as
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* possible are copied.
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*
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* The resulting output string is always null-terminated.
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*
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* @parm UINT | uiCP |
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*
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* The code page in which to perform the conversion.
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* This must be an Internet code page.
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*
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* @parm LPCSTR | pszSrc |
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*
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* Source buffer containing ANSI string to be converted.
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*
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* @parm int | cchSrc |
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*
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* Source buffer length, including terminating null.
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*
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* @parm LPWSTR | pwszDst |
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*
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* Destination buffer to receive converted UNICODE string.
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*
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* @parm int | cwchBuf |
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*
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* Size of the destination buffer in <t WCHAR>s.
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*
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* @returns
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*
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* On success, the number of characters copied to the output
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* buffer is returned, including the terminating null.
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*/
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int
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SHAnsiToUnicodeInetCP(UINT uiCP,
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LPCSTR pszSrc, int cchSrc,
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LPWSTR pwszDst, int cwchBuf)
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{
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int cchSrcT, cwchNeeded;
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int cwchRc = 0; /* Assume failure */
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HRESULT hres;
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DWORD dwMode;
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/*
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* Checks the caller should've made.
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*/
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ASSERT(IS_VALID_STRING_PTRA(pszSrc, -1));
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ASSERT(cchSrc == lstrlenA(pszSrc) + 1);
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ASSERT(IS_VALID_WRITE_BUFFER(pwszDst, WCHAR, cwchBuf));
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ASSERT(pszSrc != NULL);
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ASSERT(uiCP == 1200 || uiCP == 65000 || uiCP == 65001);
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ASSERT(pwszDst);
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ASSERT(cwchBuf);
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cchSrcT = cchSrc;
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cwchNeeded = cwchBuf;
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dwMode = 0;
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hres = ConvertINetMultiByteToUnicode(&dwMode, uiCP, pszSrc,
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&cchSrcT, pwszDst, &cwchNeeded);
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if (SUCCEEDED(hres)) {
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if (cchSrcT >= cchSrc) {
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/*
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* The output buffer was big enough; no double-buffering
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* needed.
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*/
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cwchRc = cwchNeeded;
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} else {
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/*
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* The output buffer wasn't big enough. Need to double-buffer.
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*/
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LPWSTR pwsz = (LPWSTR)LocalAlloc(LMEM_FIXED,
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cwchNeeded * SIZEOF(WCHAR));
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if (pwsz) {
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dwMode = 0;
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hres = ConvertINetMultiByteToUnicode(&dwMode, uiCP, pszSrc,
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&cchSrc, pwsz, &cwchNeeded);
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if (SUCCEEDED(hres)) {
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StrCpyNW(pwszDst, pwsz, cwchBuf);
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cwchRc = cwchBuf;
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}
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LocalFree(pwsz);
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}
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}
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} else {
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/* Possibly unsupported code page */
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ASSERT(!"Unexpected error in ConvertInetMultiByteToUnicode");
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}
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return cwchRc;
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}
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/*
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* @doc EXTERNAL
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*
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* @func int | SHAnsiToUnicodeCP |
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*
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* Convert an ANSI string to a UNICODE string via the
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* specified code page, which can be either a native
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* Windows code page or an Internet code page.
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* If the source string is too large
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* for the destination buffer, then as many characters as
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* possible are copied.
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*
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* The resulting output string is always null-terminated.
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*
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* @parm UINT | uiCP |
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*
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* The code page in which to perform the conversion.
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*
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* @parm LPCSTR | pszSrc |
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*
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* Source buffer containing ANSI string to be converted.
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*
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* @parm LPWSTR | pwszDst |
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*
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* Destination buffer to receive converted UNICODE string.
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*
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* @parm int | cwchBuf |
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*
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* Size of the destination buffer in <t WCHAR>s.
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*
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* @returns
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*
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* On success, the number of characters copied to the output
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* buffer is returned, including the terminating null.
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*/
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int
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SHAnsiToUnicodeCP(UINT uiCP, LPCSTR pszSrc, LPWSTR pwszDst, int cwchBuf)
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{
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int cwchRc = 0; /* Assume failure */
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RIPMSG(IS_VALID_STRING_PTRA(pszSrc, -1), "Caller of SHAnsiToUnicodeCP passed in a NULL pszSrc!");
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ASSERT(IS_VALID_WRITE_BUFFER(pwszDst, WCHAR, cwchBuf));
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/*
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* Sanity check - NULL source string is treated as a null string.
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*/
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if (pszSrc == NULL) {
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pszSrc = "";
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}
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/*
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* Sanity check - Output buffer must be non-NULL and must be of
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* nonzero size.
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*/
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if (pwszDst && cwchBuf) {
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int cchSrc;
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pwszDst[0] = 0; /* In case of error */
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cchSrc = lstrlenA(pszSrc) + 1;
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/*
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* Decide what kind of code page it is.
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*/
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switch (uiCP) {
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case 1200: // UCS-2 (Unicode)
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uiCP = 65001;
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// Fall through
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case 50000: // "User Defined"
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case 65000: // UTF-7
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case 65001: // UTF-8
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cwchRc = SHAnsiToUnicodeInetCP(uiCP, pszSrc, cchSrc, pwszDst, cwchBuf);
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break;
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default:
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cwchRc = SHAnsiToUnicodeNativeCP(uiCP, pszSrc, cchSrc, pwszDst, cwchBuf);
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break;
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}
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}
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return cwchRc;
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}
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// This function exists to make sure SHAnsiToAnsi and SHUnicodeToAnsi
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// have the same return value. Callers use SHTCharToAnsi and don't know
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// when it callapses to SHAnsiToAnsi.
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int SHAnsiToAnsi(LPCSTR pszSrc, LPSTR pszDst, int cchBuf)
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{
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int cchRc = 0; /* Assume failure */
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if (cchBuf)
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{
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// APP COMPAT! WARNING! Sony PictureGear passes too-small buffers to
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// SHGetPathFromIDList (which uses SHAnsiToAnsi eventually), so we
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// must be careful to pass the actual buffer size to SHTruncateString
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// and not the theoretical maximum (rarely attained).
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LPSTR pszEnd = StrCpyNXA(pszDst, pszSrc, cchBuf);
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cchRc = (int)(pszEnd - pszDst) + 1;
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cchRc = SHTruncateString(pszDst, cchRc) + 1;
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}
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return cchRc;
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}
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// This function exists to make sure SHUnicodeToUnicode and SHUnicodeToAnsi
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// have the same return value. Callers use SHTCharToUnicode and don't know
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// when it callapses to SHUnicodeToUnicode.
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int SHUnicodeToUnicode(LPCWSTR pwzSrc, LPWSTR pwzDst, int cchBuf)
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{
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return (int) (StrCpyNXW(pwzDst, pwzSrc, cchBuf) - pwzDst + 1); // size including terminator
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}
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||
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|
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||
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|
|
||
|
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/*
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||
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|
* @doc EXTERNAL
|
||
|
|
*
|
||
|
|
* @func int | SHAnsiToUnicode |
|
||
|
|
*
|
||
|
|
* Convert an ANSI string to a UNICODE string via the
|
||
|
|
* <c CP_ACP> code page. If the source string is too large
|
||
|
|
* for the destination buffer, then as many characters as
|
||
|
|
* possible are copied.
|
||
|
|
*
|
||
|
|
* The resulting output string is always null-terminated.
|
||
|
|
*
|
||
|
|
* @parm LPCSTR | pszSrc |
|
||
|
|
*
|
||
|
|
* Source buffer containing ANSI string to be converted.
|
||
|
|
*
|
||
|
|
* @parm LPWSTR | pwszDst |
|
||
|
|
*
|
||
|
|
* Destination buffer to receive converted UNICODE string.
|
||
|
|
*
|
||
|
|
* @parm int | cwchBuf |
|
||
|
|
*
|
||
|
|
* Size of the destination buffer in <t WCHAR>s.
|
||
|
|
*
|
||
|
|
* @returns
|
||
|
|
*
|
||
|
|
* On success, the number of characters copied to the output
|
||
|
|
* buffer is returned, including the terminating null.
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||
|
|
*
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||
|
|
*/
|
||
|
|
|
||
|
|
int
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|
SHAnsiToUnicode(LPCSTR pszSrc, LPWSTR pwszDst, int cwchBuf)
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||
|
|
{
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||
|
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return SHAnsiToUnicodeCP(CP_ACP, pszSrc, pwszDst, cwchBuf);
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||
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}
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||
|
|
|
||
|
|
/*
|
||
|
|
* @doc INTERNAL
|
||
|
|
*
|
||
|
|
* @func int | SHUnicodeToAnsiNativeCP |
|
||
|
|
*
|
||
|
|
* Convert a UNICODE string to an ANSI string via the
|
||
|
|
* specified Windows code page. If the source string is too large
|
||
|
|
* for the destination buffer, then as many characters as
|
||
|
|
* possible are copied. Care is taken not to break a double-byte
|
||
|
|
* character.
|
||
|
|
*
|
||
|
|
* The resulting output string is always null-terminated.
|
||
|
|
*
|
||
|
|
* @parm UINT | uiCP |
|
||
|
|
*
|
||
|
|
* The code page in which to perform the conversion.
|
||
|
|
* This must be a Windows code page.
|
||
|
|
*
|
||
|
|
* @parm LPCWSTR | pwszSrc |
|
||
|
|
*
|
||
|
|
* Source buffer containing UNICODE string to be converted.
|
||
|
|
*
|
||
|
|
* @parm int | cwchSrc |
|
||
|
|
*
|
||
|
|
* Number of characters in source buffer, including terminating
|
||
|
|
* null.
|
||
|
|
*
|
||
|
|
* @parm LPSTR | pszDst |
|
||
|
|
*
|
||
|
|
* Destination buffer to receive converted ANSI string.
|
||
|
|
*
|
||
|
|
* @parm int | cchBuf |
|
||
|
|
*
|
||
|
|
* Size of the destination buffer in <t CHAR>s.
|
||
|
|
*
|
||
|
|
* @returns
|
||
|
|
*
|
||
|
|
* On success, the number of characters copied to the output
|
||
|
|
* buffer is returned, including the terminating null.
|
||
|
|
* (For the purpose of this function, a double-byte character
|
||
|
|
* counts as two characters.)
|
||
|
|
*/
|
||
|
|
|
||
|
|
int
|
||
|
|
SHUnicodeToAnsiNativeCP(UINT uiCP,
|
||
|
|
LPCWSTR pwszSrc, int cwchSrc,
|
||
|
|
LPSTR pszDst, int cchBuf)
|
||
|
|
|
||
|
|
{
|
||
|
|
int cchRc = 0; /* Assume failure */
|
||
|
|
|
||
|
|
#ifdef DEBUG
|
||
|
|
BOOL fVerify = TRUE;
|
||
|
|
BOOL fLossy;
|
||
|
|
if (uiCP == CP_ACPNOVALIDATE) {
|
||
|
|
// -1 means use CP_ACP, but do *not* verify
|
||
|
|
// kind of a hack, but it's DEBUG and leaves 99% of callers unchanged
|
||
|
|
uiCP = CP_ACP;
|
||
|
|
fVerify = FALSE;
|
||
|
|
}
|
||
|
|
#define USUALLY_NULL (&fLossy)
|
||
|
|
#else
|
||
|
|
#define USUALLY_NULL NULL
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Checks the caller should've made.
|
||
|
|
*/
|
||
|
|
ASSERT(IS_VALID_STRING_PTRW(pwszSrc, -1));
|
||
|
|
ASSERT(cwchSrc == lstrlenW(pwszSrc) + 1);
|
||
|
|
ASSERT(IS_VALID_WRITE_BUFFER(pszDst, CHAR, cchBuf));
|
||
|
|
ASSERT(uiCP != 1200 && uiCP != 65000 && uiCP != 50000 && uiCP != 65001);
|
||
|
|
ASSERT(pwszSrc);
|
||
|
|
ASSERT(pszDst);
|
||
|
|
ASSERT(cchBuf);
|
||
|
|
|
||
|
|
cchRc = WideCharToMultiByte(uiCP, 0, pwszSrc, cwchSrc, pszDst, cchBuf,
|
||
|
|
NULL, USUALLY_NULL);
|
||
|
|
if (cchRc) {
|
||
|
|
/*
|
||
|
|
* The output buffer was big enough; no double-buffering
|
||
|
|
* needed.
|
||
|
|
*/
|
||
|
|
} else if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
|
||
|
|
/*
|
||
|
|
* The output buffer wasn't big enough. Need to double-buffer.
|
||
|
|
*/
|
||
|
|
|
||
|
|
int cchNeeded = WideCharToMultiByte(uiCP, 0, pwszSrc, cwchSrc,
|
||
|
|
NULL, 0, NULL, NULL);
|
||
|
|
|
||
|
|
ASSERT(cchRc == 0); /* In case we fail later */
|
||
|
|
if (cchNeeded) {
|
||
|
|
LPSTR psz = (LPSTR)LocalAlloc(LMEM_FIXED,
|
||
|
|
cchNeeded * SIZEOF(CHAR));
|
||
|
|
if (psz) {
|
||
|
|
cchRc = WideCharToMultiByte(uiCP, 0, pwszSrc, cwchSrc,
|
||
|
|
psz, cchNeeded, NULL, USUALLY_NULL);
|
||
|
|
if (cchRc) {
|
||
|
|
// lstrcpyn doesn't check if it's chopping a DBCS char
|
||
|
|
// so we need to use SHTruncateString.
|
||
|
|
//
|
||
|
|
// Add 1 because SHTruncateString doesn't count
|
||
|
|
// the trailing null but we do
|
||
|
|
//
|
||
|
|
// Assert that we meet the preconditions for
|
||
|
|
// SHTruncateString to return a valid value.
|
||
|
|
//
|
||
|
|
ASSERT(cchRc > cchBuf);
|
||
|
|
cchRc = SHTruncateString(psz, cchBuf) + 1;
|
||
|
|
lstrcpynA(pszDst, psz, cchBuf);
|
||
|
|
}
|
||
|
|
LocalFree(psz);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
/* Possibly unsupported code page */
|
||
|
|
ASSERT(!"Unexpected error in WideCharToMultiByte");
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef DEBUG
|
||
|
|
TBOOL(!fVerify || !fLossy);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return cchRc;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* @doc INTERNAL
|
||
|
|
*
|
||
|
|
* @func int | SHUnicodeToAnsiInetCP |
|
||
|
|
*
|
||
|
|
* Convert a UNICODE string to an ANSI string via the
|
||
|
|
* specified Internet code page. If the source string is too large
|
||
|
|
* for the destination buffer, then as many characters as
|
||
|
|
* possible are copied. Care is taken not to break a double-byte
|
||
|
|
* character.
|
||
|
|
*
|
||
|
|
* The resulting output string is always null-terminated.
|
||
|
|
*
|
||
|
|
* @parm UINT | uiCP |
|
||
|
|
*
|
||
|
|
* The code page in which to perform the conversion.
|
||
|
|
* This must be an Internet code page.
|
||
|
|
*
|
||
|
|
* @parm LPCWSTR | pwszSrc |
|
||
|
|
*
|
||
|
|
* Source buffer containing UNICODE string to be converted.
|
||
|
|
*
|
||
|
|
* @parm int | cwchSrc |
|
||
|
|
*
|
||
|
|
* Number of characters in source buffer, including terminating
|
||
|
|
* null.
|
||
|
|
*
|
||
|
|
* @parm LPSTR | pszDst |
|
||
|
|
*
|
||
|
|
* Destination buffer to receive converted ANSI string.
|
||
|
|
*
|
||
|
|
* @parm int | cchBuf |
|
||
|
|
*
|
||
|
|
* Size of the destination buffer in <t CHAR>s.
|
||
|
|
*
|
||
|
|
* @returns
|
||
|
|
*
|
||
|
|
* On success, the number of characters copied to the output
|
||
|
|
* buffer is returned, including the terminating null.
|
||
|
|
* (For the purpose of this function, a double-byte character
|
||
|
|
* counts as two characters.)
|
||
|
|
*/
|
||
|
|
|
||
|
|
int
|
||
|
|
SHUnicodeToAnsiInetCP(UINT uiCP,
|
||
|
|
LPCWSTR pwszSrc, int cwchSrc,
|
||
|
|
LPSTR pszDst, int cchBuf)
|
||
|
|
{
|
||
|
|
int cwchSrcT, cchNeeded;
|
||
|
|
int cchRc = 0; /* Assume failure */
|
||
|
|
DWORD dwMode;
|
||
|
|
HRESULT hres;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Checks the caller should've made.
|
||
|
|
*/
|
||
|
|
ASSERT(IS_VALID_STRING_PTRW(pwszSrc, -1));
|
||
|
|
ASSERT(cwchSrc == lstrlenW(pwszSrc) + 1);
|
||
|
|
ASSERT(IS_VALID_WRITE_BUFFER(pszDst, CHAR, cchBuf));
|
||
|
|
ASSERT(uiCP == 1200 || uiCP == 65000 || uiCP == 65001);
|
||
|
|
ASSERT(pwszSrc);
|
||
|
|
ASSERT(pszDst);
|
||
|
|
ASSERT(cchBuf);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Note that not all encodings translate a null terminator into a null
|
||
|
|
* terminator, so we have to save the NUL for last.
|
||
|
|
*/
|
||
|
|
|
||
|
|
cwchSrc--; /* Save the NUL for last */
|
||
|
|
cwchSrcT = cwchSrc;
|
||
|
|
cchNeeded = cchBuf - 1; /* Save the NUL for last */
|
||
|
|
|
||
|
|
dwMode = 0; /* Start fresh */
|
||
|
|
hres = ConvertINetUnicodeToMultiByte(&dwMode, uiCP, pwszSrc,
|
||
|
|
&cwchSrcT, pszDst, &cchNeeded);
|
||
|
|
if (SUCCEEDED(hres)) {
|
||
|
|
if (cwchSrcT >= cwchSrc) {
|
||
|
|
/*
|
||
|
|
* The output buffer was big enough; no double-buffering
|
||
|
|
* needed. Translate the NUL manually.
|
||
|
|
*/
|
||
|
|
ASSERT(cchNeeded < cchBuf);
|
||
|
|
pszDst[cchNeeded] = TEXT('\0');
|
||
|
|
cchRc = cchNeeded + 1;
|
||
|
|
} else {
|
||
|
|
/*
|
||
|
|
* The output buffer wasn't big enough. Need to double-buffer.
|
||
|
|
*/
|
||
|
|
LPSTR psz = (LPSTR)LocalAlloc(LMEM_FIXED,
|
||
|
|
cchNeeded * SIZEOF(CHAR));
|
||
|
|
if (psz) {
|
||
|
|
dwMode = 0; /* Start fresh */
|
||
|
|
hres = ConvertINetUnicodeToMultiByte(&dwMode, uiCP, pwszSrc,
|
||
|
|
&cwchSrc, psz, &cchNeeded);
|
||
|
|
if (SUCCEEDED(hres)) {
|
||
|
|
// lstrcpyn doesn't check if it's chopping a DBCS char
|
||
|
|
// so we need to use SHTruncateString.
|
||
|
|
//
|
||
|
|
// Add 1 because SHTruncateString doesn't count
|
||
|
|
// the trailing null but we do
|
||
|
|
//
|
||
|
|
// Assert that we meet the preconditions for
|
||
|
|
// SHTruncateString to return a valid value.
|
||
|
|
//
|
||
|
|
ASSERT(cchNeeded > cchBuf);
|
||
|
|
cchRc = SHTruncateString(psz, cchBuf) + 1;
|
||
|
|
lstrcpynA(pszDst, psz, cchBuf);
|
||
|
|
}
|
||
|
|
LocalFree(psz);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
/* Possibly unsupported code page */
|
||
|
|
ASSERT(!"Unexpected error in ConvertInetUnicodeToMultiByte");
|
||
|
|
}
|
||
|
|
|
||
|
|
return cchRc;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* @doc EXTERNAL
|
||
|
|
*
|
||
|
|
* @func int | SHUnicodeToAnsiCP |
|
||
|
|
*
|
||
|
|
* Convert a UNICODE string to an ANSI string via the
|
||
|
|
* specified code page, which can be either a native
|
||
|
|
* Windows code page or an Internet code page.
|
||
|
|
* If the source string is too large
|
||
|
|
* for the destination buffer, then as many characters as
|
||
|
|
* possible are copied. Care is taken not to break a double-byte
|
||
|
|
* character.
|
||
|
|
*
|
||
|
|
* The resulting output string is always null-terminated.
|
||
|
|
*
|
||
|
|
* @parm UINT | uiCP |
|
||
|
|
*
|
||
|
|
* The code page in which to perform the conversion.
|
||
|
|
*
|
||
|
|
* @parm LPCWSTR | pwszSrc |
|
||
|
|
*
|
||
|
|
* Source buffer containing UNICODE string to be converted.
|
||
|
|
*
|
||
|
|
* @parm LPSTR | pszDst |
|
||
|
|
*
|
||
|
|
* Destination buffer to receive converted ANSI string.
|
||
|
|
*
|
||
|
|
* @parm int | cchBuf |
|
||
|
|
*
|
||
|
|
* Size of the destination buffer in <t CHAR>s.
|
||
|
|
*
|
||
|
|
* @returns
|
||
|
|
*
|
||
|
|
* On success, the number of characters copied to the output
|
||
|
|
* buffer is returned, including the terminating null.
|
||
|
|
* (For the purpose of this function, a double-byte character
|
||
|
|
* counts as two characters.)
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
int
|
||
|
|
SHUnicodeToAnsiCP(UINT uiCP, LPCWSTR pwszSrc, LPSTR pszDst, int cchBuf)
|
||
|
|
{
|
||
|
|
int cchRc = 0; /* Assume failure */
|
||
|
|
#ifdef DEBUG
|
||
|
|
#define GET_CP(uiCP) (((uiCP) == CP_ACPNOVALIDATE) ? CP_ACP : (uiCP))
|
||
|
|
#else
|
||
|
|
#define GET_CP(uiCP) uiCP
|
||
|
|
#endif
|
||
|
|
|
||
|
|
RIPMSG(IS_VALID_STRING_PTRW(pwszSrc, -1), "Caller of SHUnicodeToAnsiCP passed in a NULL pwszSrc!");
|
||
|
|
ASSERT(IS_VALID_WRITE_BUFFER(pszDst, CHAR, cchBuf));
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Sanity check - NULL source string is treated as a null string.
|
||
|
|
*/
|
||
|
|
if (pwszSrc == NULL) {
|
||
|
|
pwszSrc = L"";
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Sanity check - Output buffer must be non-NULL and must be of
|
||
|
|
* nonzero size.
|
||
|
|
*/
|
||
|
|
if (pszDst && cchBuf) {
|
||
|
|
|
||
|
|
int cwchSrc;
|
||
|
|
|
||
|
|
pszDst[0] = 0; /* In case of error */
|
||
|
|
|
||
|
|
cwchSrc = lstrlenW(pwszSrc) + 1; /* Yes, Win9x has lstrlenW */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Decide what kind of code page it is.
|
||
|
|
*/
|
||
|
|
switch (GET_CP(uiCP)) {
|
||
|
|
case 1200: // UCS-2 (Unicode)
|
||
|
|
uiCP = 65001;
|
||
|
|
// Fall through
|
||
|
|
case 50000: // "User Defined"
|
||
|
|
case 65000: // UTF-7
|
||
|
|
case 65001: // UTF-8
|
||
|
|
cchRc = SHUnicodeToAnsiInetCP(GET_CP(uiCP), pwszSrc, cwchSrc, pszDst, cchBuf);
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
cchRc = SHUnicodeToAnsiNativeCP(uiCP, pwszSrc, cwchSrc, pszDst, cchBuf);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return cchRc;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* @doc EXTERNAL
|
||
|
|
*
|
||
|
|
* @func int | SHUnicodeToAnsi |
|
||
|
|
*
|
||
|
|
* Convert a UNICODE string to an ANSI string via the
|
||
|
|
* <c CP_ACP> code page. If the source string is too large
|
||
|
|
* for the destination buffer, then as many characters as
|
||
|
|
* possible are copied. Care is taken not to break a double-byte
|
||
|
|
* character.
|
||
|
|
*
|
||
|
|
* The resulting output string is always null-terminated.
|
||
|
|
*
|
||
|
|
* @parm LPCWSTR | pwszSrc |
|
||
|
|
*
|
||
|
|
* Source buffer containing UNICODE string to be converted.
|
||
|
|
*
|
||
|
|
* @parm LPSTR | pszDst |
|
||
|
|
*
|
||
|
|
* Destination buffer to receive converted ANSI string.
|
||
|
|
*
|
||
|
|
* @parm int | cchBuf |
|
||
|
|
*
|
||
|
|
* Size of the destination buffer in <t CHAR>s.
|
||
|
|
*
|
||
|
|
* @returns
|
||
|
|
*
|
||
|
|
* On success, the number of characters copied to the output
|
||
|
|
* buffer is returned, including the terminating null.
|
||
|
|
* (For the purpose of this function, a double-byte character
|
||
|
|
* counts as two characters.)
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
int
|
||
|
|
SHUnicodeToAnsi(LPCWSTR pwszSrc, LPSTR pszDst, int cchBuf)
|
||
|
|
{
|
||
|
|
return SHUnicodeToAnsiCP(CP_ACP, pwszSrc, pszDst, cchBuf);
|
||
|
|
}
|