dlls/shlwapi/url.c - wine - Git at Google

 /*
  * Url functions
  *
  * Copyright 2000 Huw D M Davies for CodeWeavers.
  */

 #include <string.h>
 #include "windef.h"
 #include "winbase.h"
 #include "winerror.h"
 #include "wine/unicode.h"
 #include "shlwapi.h"
 #include "debugtools.h"

 DEFAULT_DEBUG_CHANNEL(shell);

 static const unsigned char HashDataLookup[256] = {
  0x01, 0x0E, 0x6E, 0x19, 0x61, 0xAE, 0x84, 0x77, 0x8A, 0xAA, 0x7D, 0x76, 0x1B,
  0xE9, 0x8C, 0x33, 0x57, 0xC5, 0xB1, 0x6B, 0xEA, 0xA9, 0x38, 0x44, 0x1E, 0x07,
  0xAD, 0x49, 0xBC, 0x28, 0x24, 0x41, 0x31, 0xD5, 0x68, 0xBE, 0x39, 0xD3, 0x94,
  0xDF, 0x30, 0x73, 0x0F, 0x02, 0x43, 0xBA, 0xD2, 0x1C, 0x0C, 0xB5, 0x67, 0x46,
  0x16, 0x3A, 0x4B, 0x4E, 0xB7, 0xA7, 0xEE, 0x9D, 0x7C, 0x93, 0xAC, 0x90, 0xB0,
  0xA1, 0x8D, 0x56, 0x3C, 0x42, 0x80, 0x53, 0x9C, 0xF1, 0x4F, 0x2E, 0xA8, 0xC6,
  0x29, 0xFE, 0xB2, 0x55, 0xFD, 0xED, 0xFA, 0x9A, 0x85, 0x58, 0x23, 0xCE, 0x5F,
  0x74, 0xFC, 0xC0, 0x36, 0xDD, 0x66, 0xDA, 0xFF, 0xF0, 0x52, 0x6A, 0x9E, 0xC9,
  0x3D, 0x03, 0x59, 0x09, 0x2A, 0x9B, 0x9F, 0x5D, 0xA6, 0x50, 0x32, 0x22, 0xAF,
  0xC3, 0x64, 0x63, 0x1A, 0x96, 0x10, 0x91, 0x04, 0x21, 0x08, 0xBD, 0x79, 0x40,
  0x4D, 0x48, 0xD0, 0xF5, 0x82, 0x7A, 0x8F, 0x37, 0x69, 0x86, 0x1D, 0xA4, 0xB9,
  0xC2, 0xC1, 0xEF, 0x65, 0xF2, 0x05, 0xAB, 0x7E, 0x0B, 0x4A, 0x3B, 0x89, 0xE4,
  0x6C, 0xBF, 0xE8, 0x8B, 0x06, 0x18, 0x51, 0x14, 0x7F, 0x11, 0x5B, 0x5C, 0xFB,
  0x97, 0xE1, 0xCF, 0x15, 0x62, 0x71, 0x70, 0x54, 0xE2, 0x12, 0xD6, 0xC7, 0xBB,
  0x0D, 0x20, 0x5E, 0xDC, 0xE0, 0xD4, 0xF7, 0xCC, 0xC4, 0x2B, 0xF9, 0xEC, 0x2D,
  0xF4, 0x6F, 0xB6, 0x99, 0x88, 0x81, 0x5A, 0xD9, 0xCA, 0x13, 0xA5, 0xE7, 0x47,
  0xE6, 0x8E, 0x60, 0xE3, 0x3E, 0xB3, 0xF6, 0x72, 0xA2, 0x35, 0xA0, 0xD7, 0xCD,
  0xB4, 0x2F, 0x6D, 0x2C, 0x26, 0x1F, 0x95, 0x87, 0x00, 0xD8, 0x34, 0x3F, 0x17,
  0x25, 0x45, 0x27, 0x75, 0x92, 0xB8, 0xA3, 0xC8, 0xDE, 0xEB, 0xF8, 0xF3, 0xDB,
  0x0A, 0x98, 0x83, 0x7B, 0xE5, 0xCB, 0x4C, 0x78, 0xD1 };

 static BOOL URL_NeedEscape(CHAR ch, DWORD dwFlags)
 {

     if (isalnum(ch))
         return FALSE;

     if(dwFlags & URL_ESCAPE_SPACES_ONLY) {
         if(ch == ' ')
 	    return TRUE;
 	else
 	    return FALSE;
     }

     if (ch <= 31 || ch >= 127)
 	return TRUE;

     else {
         switch (ch) {
 	case ' ':
 	case '<':
 	case '>':
 	case '\"':
 	case '{':
 	case '}':
 	case '|':
 	case '\\':
 	case '^':
 	case ']':
 	case '[':
 	case '`':
 	case '&':
 	    return TRUE;

 	default:
 	    return FALSE;
 	}
     }
 }

 /*************************************************************************
  *        UrlCanonicalizeA     [SHLWAPI.@]
  */
 HRESULT WINAPI UrlCanonicalizeA(LPCSTR pszUrl, LPSTR pszCanonicalized,
 	LPDWORD pcchCanonicalized, DWORD dwFlags)
 {
     HRESULT hr = S_OK;

     LPSTR lpszUrlCpy;
     INT nLen;

     TRACE("(%s %p %p 0x%08lx)\n", debugstr_a(pszUrl), pszCanonicalized,
 	  pcchCanonicalized, dwFlags);

     nLen = strlen(pszUrl);
     lpszUrlCpy = HeapAlloc(GetProcessHeap(), 0, nLen + 1);

     if (dwFlags & URL_DONT_SIMPLIFY)
         memcpy(lpszUrlCpy, pszUrl, nLen + 1);
     else {
         FIXME("Simplify path\n");
         memcpy(lpszUrlCpy, pszUrl, nLen + 1);
     }

     if(dwFlags & URL_UNESCAPE)
         UrlUnescapeA(lpszUrlCpy, NULL, NULL, URL_UNESCAPE_INPLACE);

     if(dwFlags & (URL_ESCAPE_UNSAFE | URL_ESCAPE_SPACES_ONLY)) {
         DWORD EscapeFlags = dwFlags & (URL_ESCAPE_SPACES_ONLY
 				       /* | URL_ESCAPE_PERCENT */);
 	hr = UrlEscapeA(lpszUrlCpy, pszCanonicalized, pcchCanonicalized,
 			EscapeFlags);
     } else { /* No escapping needed, just copy the string */
         nLen = strlen(lpszUrlCpy);
 	if(nLen < *pcchCanonicalized)
 	    memcpy(pszCanonicalized, lpszUrlCpy, nLen + 1);
 	else {
 	    hr = E_POINTER;
 	    nLen++;
 	}
 	*pcchCanonicalized = nLen;
     }

     HeapFree(GetProcessHeap(), 0, lpszUrlCpy);

     return hr;
 }

 /*************************************************************************
  *        UrlCanonicalizeW     [SHLWAPI.@]
  */
 HRESULT WINAPI UrlCanonicalizeW(LPCWSTR pszUrl, LPWSTR pszCanonicalized,
 				LPDWORD pcchCanonicalized, DWORD dwFlags)
 {
     FIXME("(%s %p %p 0x%08lx): stub\n",debugstr_w(pszUrl),
 	  pszCanonicalized, pcchCanonicalized, dwFlags);
     return E_NOTIMPL;
 }

 /*************************************************************************
  *      UrlEscapeA	[SHLWAPI.@]
  *
  * Converts unsafe characters into their escape sequences.
  *
  * The converted string is returned in pszEscaped if the buffer size
  * (which should be supplied in pcchEscaped) is large enough, in this
  * case the function returns S_OK and pcchEscaped contains the length
  * of the escaped string.  If the buffer is not large enough the
  * function returns E_POINTER and pcchEscaped contains the required
  * buffer size (including room for the '\0').
  *
  * By default the function stops converting at the first '?' or
  * '#'. [MSDN says differently].  If URL_ESCAPE_SPACE_ONLY flag is set
  * then only spaces are converted, but the conversion continues past a
  * '?' or '#'.
  *
  * BUGS:
  *
  * None of the URL_ define values are documented, so they were
  * determined by trial and error.  MSDN mentions URL_ESCAPE_PERCENT
  * but I can't find a value that does this under win2000.
  * URL_DONT_ESCAPE_EXTRA_INFO appears to be the default which is what
  * we assume here.  URL_ESCAPE_SEGMENT_ONLY is not implemented
  * (value??).  A value of 0x2000 for dwFlags seems to escape
  * '/'s too - this is neither documented on MSDN nor implemented here.
  * For character values that are converted see URL_NeedEscape.
  */
 HRESULT WINAPI UrlEscapeA(
 	LPCSTR pszUrl,
 	LPSTR pszEscaped,
 	LPDWORD pcchEscaped,
 	DWORD dwFlags)
 {
     LPCSTR src;
     DWORD needed = 0, ret;
     BOOL stop_escapping = FALSE;
     char next[3], *dst = pszEscaped;
     char hex[] = "0123456789ABCDEF";
     INT len;

     TRACE("(%s %p %p 0x%08lx)\n", debugstr_a(pszUrl), pszEscaped,
 	  pcchEscaped, dwFlags);

     if(dwFlags & ~URL_ESCAPE_SPACES_ONLY)
         FIXME("Unimplemented flags: %08lx\n", dwFlags);

     for(src = pszUrl; *src; src++) {
         if(!(dwFlags & URL_ESCAPE_SPACES_ONLY) &&
 	   (*src == '#' || *src == '?'))
 	    stop_escapping = TRUE;

 	if(URL_NeedEscape(*src, dwFlags) && stop_escapping == FALSE) {
 	    next[0] = '%';
 	    next[1] = hex[(*src >> 4) & 0xf];
 	    next[2] = hex[*src & 0xf];
 	    len = 3;
 	} else {
 	    next[0] = *src;
 	    len = 1;
 	}

 	if(needed + len <= *pcchEscaped) {
 	    memcpy(dst, next, len);
 	    dst += len;
 	}
 	needed += len;
     }

     if(needed < *pcchEscaped) {
         *dst = '\0';
 	ret = S_OK;
     } else {
         needed++; /* add one for the '\0' */
 	ret = E_POINTER;
     }
     *pcchEscaped = needed;
     return ret;
 }

 /*************************************************************************
  *      UrlEscapeW	[SHLWAPI.@]
  */
 HRESULT WINAPI UrlEscapeW(
 	LPCWSTR pszUrl,
 	LPWSTR pszEscaped,
 	LPDWORD pcchEscaped,
 	DWORD dwFlags)
 {
     FIXME("(%s %p %p 0x%08lx): stub\n",debugstr_w(pszUrl),
 	  pszEscaped, pcchEscaped, dwFlags);
     return E_NOTIMPL;
 }


 /*************************************************************************
  *      UrlUnescapeA	[SHLWAPI.@]
  *
  * Converts escape sequences back to ordinary characters.
  *
  * If URL_ESCAPE_INPLACE is set in dwFlags then pszUnescaped and
  * pcchUnescaped are ignored and the converted string is returned in
  * pszUrl, otherwise the string is returned in pszUnescaped.
  * pcchUnescaped should contain the size of pszUnescaped on calling
  * and will contain the length the the returned string on return if
  * the buffer is big enough else it will contain the buffer size
  * required (including room for the '\0').  The function returns S_OK
  * on success or E_POINTER if the buffer is not large enough.  If the
  * URL_DONT_ESCAPE_EXTRA_INFO flag is set then the conversion stops at
  * the first occurrence of either '?' or '#'.
  *
  */
 HRESULT WINAPI UrlUnescapeA(
 	LPCSTR pszUrl,
 	LPSTR pszUnescaped,
 	LPDWORD pcchUnescaped,
 	DWORD dwFlags)
 {
     char *dst, next;
     LPCSTR src;
     HRESULT ret;
     DWORD needed;
     BOOL stop_unescapping = FALSE;

     TRACE("(%s, %p, %p, %08lx): stub\n", debugstr_a(pszUrl), pszUnescaped,
 	  pcchUnescaped, dwFlags);

     if(dwFlags & URL_UNESCAPE_INPLACE)
         dst = (char*)pszUrl;
     else
         dst = pszUnescaped;

     for(src = pszUrl, needed = 0; *src; src++, needed++) {
         if(dwFlags & URL_DONT_UNESCAPE_EXTRA_INFO &&
 	   (*src == '#' || *src == '?')) {
 	    stop_unescapping = TRUE;
 	    next = *src;
 	} else if(*src == '%' && isxdigit(*(src + 1)) && isxdigit(*(src + 2))
 		  && stop_unescapping == FALSE) {
 	    INT ih;
 	    char buf[3];
 	    memcpy(buf, src + 1, 2);
 	    buf[2] = '\0';
 	    ih = strtol(buf, NULL, 16);
 	    next = (CHAR) ih;
 	    src += 2; /* Advance to end of escape */
 	} else
 	    next = *src;

 	if(dwFlags & URL_UNESCAPE_INPLACE || needed < *pcchUnescaped)
 	    *dst++ = next;
     }

     if(dwFlags & URL_UNESCAPE_INPLACE || needed < *pcchUnescaped) {
         *dst = '\0';
 	ret = S_OK;
     } else {
         needed++; /* add one for the '\0' */
 	ret = E_POINTER;
     }
     if(!(dwFlags & URL_UNESCAPE_INPLACE))
         *pcchUnescaped = needed;

     return ret;
 }

 /*************************************************************************
  *      UrlUnescapeW	[SHLWAPI.@]
  */
 HRESULT WINAPI UrlUnescapeW(
 	LPCWSTR pszUrl,
 	LPWSTR pszUnescaped,
 	LPDWORD pcchUnescaped,
 	DWORD dwFlags)
 {
     FIXME("(%s, %p, %p, %08lx): stub\n", debugstr_w(pszUrl), pszUnescaped,
 	  pcchUnescaped, dwFlags);
     return E_NOTIMPL;
 }

 /*************************************************************************
  *      HashData	[SHLWAPI.@]
  *
  * Hash an input block into a variable sized digest.
  */
 BOOL WINAPI HashData(const unsigned char *lpSrc, INT nSrcLen,
                      unsigned char *lpDest, INT nDestLen)
 {
   INT srcCount = nSrcLen - 1, destCount = nDestLen - 1;

   if (IsBadReadPtr(lpSrc, nSrcLen) ||
       IsBadWritePtr(lpDest, nDestLen))
     return FALSE;

   while (destCount >= 0)
   {
     lpDest[destCount] = (destCount & 0xff);
     destCount--;
   }

   while (srcCount >= 0)
   {
     destCount = nDestLen - 1;
     while (destCount >= 0)
     {
       lpDest[destCount] = HashDataLookup[lpSrc[srcCount] ^ lpDest[destCount]];
       destCount--;
     }
     srcCount--;
   }
   return TRUE;
 }

 /*************************************************************************
  *      UrlHashA	[SHLWAPI.@]
  *
  * Hash an ASCII URL.
  */
 HRESULT WINAPI UrlHashA(LPCSTR pszUrl, unsigned char *lpDest, INT nDestLen)
 {
   if (IsBadStringPtrA(pszUrl, -1) || IsBadWritePtr(lpDest, nDestLen))
     return E_INVALIDARG;

   HashData(pszUrl, strlen(pszUrl), lpDest, nDestLen);
   return NOERROR;
 }

 /*************************************************************************
  *      UrlApplySchemeW	[SHLWAPI.@]
  */
 HRESULT WINAPI UrlApplySchemeW(LPCWSTR pszIn, LPWSTR pszOut, LPDWORD pcchOut, DWORD dwFlags)
 {
     HRESULT err = NOERROR;
     FIXME("(%s %p %p %08lx): stub !\n", debugstr_w(pszIn), pszOut, pcchOut, dwFlags);
     strcpyW(pszOut, pszIn);
     *pcchOut = (err != E_POINTER) ? strlenW(pszOut) : 0;
     return err;
 }
	/*
	* Url functions
	*
	* Copyright 2000 Huw D M Davies for CodeWeavers.
	*/

	#include <string.h>
	#include "windef.h"
	#include "winbase.h"
	#include "winerror.h"
	#include "wine/unicode.h"
	#include "shlwapi.h"
	#include "debugtools.h"

	DEFAULT_DEBUG_CHANNEL(shell);

	static const unsigned char HashDataLookup[256] = {
	0x01, 0x0E, 0x6E, 0x19, 0x61, 0xAE, 0x84, 0x77, 0x8A, 0xAA, 0x7D, 0x76, 0x1B,
	0xE9, 0x8C, 0x33, 0x57, 0xC5, 0xB1, 0x6B, 0xEA, 0xA9, 0x38, 0x44, 0x1E, 0x07,
	0xAD, 0x49, 0xBC, 0x28, 0x24, 0x41, 0x31, 0xD5, 0x68, 0xBE, 0x39, 0xD3, 0x94,
	0xDF, 0x30, 0x73, 0x0F, 0x02, 0x43, 0xBA, 0xD2, 0x1C, 0x0C, 0xB5, 0x67, 0x46,
	0x16, 0x3A, 0x4B, 0x4E, 0xB7, 0xA7, 0xEE, 0x9D, 0x7C, 0x93, 0xAC, 0x90, 0xB0,
	0xA1, 0x8D, 0x56, 0x3C, 0x42, 0x80, 0x53, 0x9C, 0xF1, 0x4F, 0x2E, 0xA8, 0xC6,
	0x29, 0xFE, 0xB2, 0x55, 0xFD, 0xED, 0xFA, 0x9A, 0x85, 0x58, 0x23, 0xCE, 0x5F,
	0x74, 0xFC, 0xC0, 0x36, 0xDD, 0x66, 0xDA, 0xFF, 0xF0, 0x52, 0x6A, 0x9E, 0xC9,
	0x3D, 0x03, 0x59, 0x09, 0x2A, 0x9B, 0x9F, 0x5D, 0xA6, 0x50, 0x32, 0x22, 0xAF,
	0xC3, 0x64, 0x63, 0x1A, 0x96, 0x10, 0x91, 0x04, 0x21, 0x08, 0xBD, 0x79, 0x40,
	0x4D, 0x48, 0xD0, 0xF5, 0x82, 0x7A, 0x8F, 0x37, 0x69, 0x86, 0x1D, 0xA4, 0xB9,
	0xC2, 0xC1, 0xEF, 0x65, 0xF2, 0x05, 0xAB, 0x7E, 0x0B, 0x4A, 0x3B, 0x89, 0xE4,
	0x6C, 0xBF, 0xE8, 0x8B, 0x06, 0x18, 0x51, 0x14, 0x7F, 0x11, 0x5B, 0x5C, 0xFB,
	0x97, 0xE1, 0xCF, 0x15, 0x62, 0x71, 0x70, 0x54, 0xE2, 0x12, 0xD6, 0xC7, 0xBB,
	0x0D, 0x20, 0x5E, 0xDC, 0xE0, 0xD4, 0xF7, 0xCC, 0xC4, 0x2B, 0xF9, 0xEC, 0x2D,
	0xF4, 0x6F, 0xB6, 0x99, 0x88, 0x81, 0x5A, 0xD9, 0xCA, 0x13, 0xA5, 0xE7, 0x47,
	0xE6, 0x8E, 0x60, 0xE3, 0x3E, 0xB3, 0xF6, 0x72, 0xA2, 0x35, 0xA0, 0xD7, 0xCD,
	0xB4, 0x2F, 0x6D, 0x2C, 0x26, 0x1F, 0x95, 0x87, 0x00, 0xD8, 0x34, 0x3F, 0x17,
	0x25, 0x45, 0x27, 0x75, 0x92, 0xB8, 0xA3, 0xC8, 0xDE, 0xEB, 0xF8, 0xF3, 0xDB,
	0x0A, 0x98, 0x83, 0x7B, 0xE5, 0xCB, 0x4C, 0x78, 0xD1 };

	static BOOL URL_NeedEscape(CHAR ch, DWORD dwFlags)
	{

	if (isalnum(ch))
	return FALSE;

	if(dwFlags & URL_ESCAPE_SPACES_ONLY) {
	if(ch == ' ')
	return TRUE;
	else
	return FALSE;
	}

	if (ch <= 31 \|\| ch >= 127)
	return TRUE;

	else {
	switch (ch) {
	case ' ':
	case '<':
	case '>':
	case '\"':
	case '{':
	case '}':
	case '\|':
	case '\\':
	case '^':
	case ']':
	case '[':
	case '`':
	case '&':
	return TRUE;

	default:
	return FALSE;
	}
	}
	}

	/*************************************************************************
	* UrlCanonicalizeA [SHLWAPI.@]
	*/
	HRESULT WINAPI UrlCanonicalizeA(LPCSTR pszUrl, LPSTR pszCanonicalized,
	LPDWORD pcchCanonicalized, DWORD dwFlags)
	{
	HRESULT hr = S_OK;

	LPSTR lpszUrlCpy;
	INT nLen;

	TRACE("(%s %p %p 0x%08lx)\n", debugstr_a(pszUrl), pszCanonicalized,
	pcchCanonicalized, dwFlags);

	nLen = strlen(pszUrl);
	lpszUrlCpy = HeapAlloc(GetProcessHeap(), 0, nLen + 1);

	if (dwFlags & URL_DONT_SIMPLIFY)
	memcpy(lpszUrlCpy, pszUrl, nLen + 1);
	else {
	FIXME("Simplify path\n");
	memcpy(lpszUrlCpy, pszUrl, nLen + 1);
	}

	if(dwFlags & URL_UNESCAPE)
	UrlUnescapeA(lpszUrlCpy, NULL, NULL, URL_UNESCAPE_INPLACE);

	if(dwFlags & (URL_ESCAPE_UNSAFE \| URL_ESCAPE_SPACES_ONLY)) {
	DWORD EscapeFlags = dwFlags & (URL_ESCAPE_SPACES_ONLY
	/* \| URL_ESCAPE_PERCENT */);
	hr = UrlEscapeA(lpszUrlCpy, pszCanonicalized, pcchCanonicalized,
	EscapeFlags);
	} else { /* No escapping needed, just copy the string */
	nLen = strlen(lpszUrlCpy);
	if(nLen < *pcchCanonicalized)
	memcpy(pszCanonicalized, lpszUrlCpy, nLen + 1);
	else {
	hr = E_POINTER;
	nLen++;
	}
	*pcchCanonicalized = nLen;
	}

	HeapFree(GetProcessHeap(), 0, lpszUrlCpy);

	return hr;
	}

	/*************************************************************************
	* UrlCanonicalizeW [SHLWAPI.@]
	*/
	HRESULT WINAPI UrlCanonicalizeW(LPCWSTR pszUrl, LPWSTR pszCanonicalized,
	LPDWORD pcchCanonicalized, DWORD dwFlags)
	{
	FIXME("(%s %p %p 0x%08lx): stub\n",debugstr_w(pszUrl),
	pszCanonicalized, pcchCanonicalized, dwFlags);
	return E_NOTIMPL;
	}

	/*************************************************************************
	* UrlEscapeA [SHLWAPI.@]
	*
	* Converts unsafe characters into their escape sequences.
	*
	* The converted string is returned in pszEscaped if the buffer size
	* (which should be supplied in pcchEscaped) is large enough, in this
	* case the function returns S_OK and pcchEscaped contains the length
	* of the escaped string. If the buffer is not large enough the
	* function returns E_POINTER and pcchEscaped contains the required
	* buffer size (including room for the '\0').
	*
	* By default the function stops converting at the first '?' or
	* '#'. [MSDN says differently]. If URL_ESCAPE_SPACE_ONLY flag is set
	* then only spaces are converted, but the conversion continues past a
	* '?' or '#'.
	*
	* BUGS:
	*
	* None of the URL_ define values are documented, so they were
	* determined by trial and error. MSDN mentions URL_ESCAPE_PERCENT
	* but I can't find a value that does this under win2000.
	* URL_DONT_ESCAPE_EXTRA_INFO appears to be the default which is what
	* we assume here. URL_ESCAPE_SEGMENT_ONLY is not implemented
	* (value??). A value of 0x2000 for dwFlags seems to escape
	* '/'s too - this is neither documented on MSDN nor implemented here.
	* For character values that are converted see URL_NeedEscape.
	*/
	HRESULT WINAPI UrlEscapeA(
	LPCSTR pszUrl,
	LPSTR pszEscaped,
	LPDWORD pcchEscaped,
	DWORD dwFlags)
	{
	LPCSTR src;
	DWORD needed = 0, ret;
	BOOL stop_escapping = FALSE;
	char next[3], *dst = pszEscaped;
	char hex[] = "0123456789ABCDEF";
	INT len;

	TRACE("(%s %p %p 0x%08lx)\n", debugstr_a(pszUrl), pszEscaped,
	pcchEscaped, dwFlags);

	if(dwFlags & ~URL_ESCAPE_SPACES_ONLY)
	FIXME("Unimplemented flags: %08lx\n", dwFlags);

	for(src = pszUrl; *src; src++) {
	if(!(dwFlags & URL_ESCAPE_SPACES_ONLY) &&
	(src == '#' \|\| src == '?'))
	stop_escapping = TRUE;

	if(URL_NeedEscape(*src, dwFlags) && stop_escapping == FALSE) {
	next[0] = '%';
	next[1] = hex[(*src >> 4) & 0xf];
	next[2] = hex[*src & 0xf];
	len = 3;
	} else {
	next[0] = *src;
	len = 1;
	}

	if(needed + len <= *pcchEscaped) {
	memcpy(dst, next, len);
	dst += len;
	}
	needed += len;
	}

	if(needed < *pcchEscaped) {
	*dst = '\0';
	ret = S_OK;
	} else {
	needed++; /* add one for the '\0' */
	ret = E_POINTER;
	}
	*pcchEscaped = needed;
	return ret;
	}

	/*************************************************************************
	* UrlEscapeW [SHLWAPI.@]
	*/
	HRESULT WINAPI UrlEscapeW(
	LPCWSTR pszUrl,
	LPWSTR pszEscaped,
	LPDWORD pcchEscaped,
	DWORD dwFlags)
	{
	FIXME("(%s %p %p 0x%08lx): stub\n",debugstr_w(pszUrl),
	pszEscaped, pcchEscaped, dwFlags);
	return E_NOTIMPL;
	}


	/*************************************************************************
	* UrlUnescapeA [SHLWAPI.@]
	*
	* Converts escape sequences back to ordinary characters.
	*
	* If URL_ESCAPE_INPLACE is set in dwFlags then pszUnescaped and
	* pcchUnescaped are ignored and the converted string is returned in
	* pszUrl, otherwise the string is returned in pszUnescaped.
	* pcchUnescaped should contain the size of pszUnescaped on calling
	* and will contain the length the the returned string on return if
	* the buffer is big enough else it will contain the buffer size
	* required (including room for the '\0'). The function returns S_OK
	* on success or E_POINTER if the buffer is not large enough. If the
	* URL_DONT_ESCAPE_EXTRA_INFO flag is set then the conversion stops at
	* the first occurrence of either '?' or '#'.
	*
	*/
	HRESULT WINAPI UrlUnescapeA(
	LPCSTR pszUrl,
	LPSTR pszUnescaped,
	LPDWORD pcchUnescaped,
	DWORD dwFlags)
	{
	char *dst, next;
	LPCSTR src;
	HRESULT ret;
	DWORD needed;
	BOOL stop_unescapping = FALSE;

	TRACE("(%s, %p, %p, %08lx): stub\n", debugstr_a(pszUrl), pszUnescaped,
	pcchUnescaped, dwFlags);

	if(dwFlags & URL_UNESCAPE_INPLACE)
	dst = (char*)pszUrl;
	else
	dst = pszUnescaped;

	for(src = pszUrl, needed = 0; *src; src++, needed++) {
	if(dwFlags & URL_DONT_UNESCAPE_EXTRA_INFO &&
	(src == '#' \|\| src == '?')) {
	stop_unescapping = TRUE;
	next = *src;
	} else if(src == '%' && isxdigit((src + 1)) && isxdigit(*(src + 2))
	&& stop_unescapping == FALSE) {
	INT ih;
	char buf[3];
	memcpy(buf, src + 1, 2);
	buf[2] = '\0';
	ih = strtol(buf, NULL, 16);
	next = (CHAR) ih;
	src += 2; /* Advance to end of escape */
	} else
	next = *src;

	if(dwFlags & URL_UNESCAPE_INPLACE \|\| needed < *pcchUnescaped)
	*dst++ = next;
	}

	if(dwFlags & URL_UNESCAPE_INPLACE \|\| needed < *pcchUnescaped) {
	*dst = '\0';
	ret = S_OK;
	} else {
	needed++; /* add one for the '\0' */
	ret = E_POINTER;
	}
	if(!(dwFlags & URL_UNESCAPE_INPLACE))
	*pcchUnescaped = needed;

	return ret;
	}

	/*************************************************************************
	* UrlUnescapeW [SHLWAPI.@]
	*/
	HRESULT WINAPI UrlUnescapeW(
	LPCWSTR pszUrl,
	LPWSTR pszUnescaped,
	LPDWORD pcchUnescaped,
	DWORD dwFlags)
	{
	FIXME("(%s, %p, %p, %08lx): stub\n", debugstr_w(pszUrl), pszUnescaped,
	pcchUnescaped, dwFlags);
	return E_NOTIMPL;
	}

	/*************************************************************************
	* HashData [SHLWAPI.@]
	*
	* Hash an input block into a variable sized digest.
	*/
	BOOL WINAPI HashData(const unsigned char *lpSrc, INT nSrcLen,
	unsigned char *lpDest, INT nDestLen)
	{
	INT srcCount = nSrcLen - 1, destCount = nDestLen - 1;

	if (IsBadReadPtr(lpSrc, nSrcLen) \|\|
	IsBadWritePtr(lpDest, nDestLen))
	return FALSE;

	while (destCount >= 0)
	{
	lpDest[destCount] = (destCount & 0xff);
	destCount--;
	}

	while (srcCount >= 0)
	{
	destCount = nDestLen - 1;
	while (destCount >= 0)
	{
	lpDest[destCount] = HashDataLookup[lpSrc[srcCount] ^ lpDest[destCount]];
	destCount--;
	}
	srcCount--;
	}
	return TRUE;
	}

	/*************************************************************************
	* UrlHashA [SHLWAPI.@]
	*
	* Hash an ASCII URL.
	*/
	HRESULT WINAPI UrlHashA(LPCSTR pszUrl, unsigned char *lpDest, INT nDestLen)
	{
	if (IsBadStringPtrA(pszUrl, -1) \|\| IsBadWritePtr(lpDest, nDestLen))
	return E_INVALIDARG;

	HashData(pszUrl, strlen(pszUrl), lpDest, nDestLen);
	return NOERROR;
	}

	/*************************************************************************
	* UrlApplySchemeW [SHLWAPI.@]
	*/
	HRESULT WINAPI UrlApplySchemeW(LPCWSTR pszIn, LPWSTR pszOut, LPDWORD pcchOut, DWORD dwFlags)
	{
	HRESULT err = NOERROR;
	FIXME("(%s %p %p %08lx): stub !\n", debugstr_w(pszIn), pszOut, pcchOut, dwFlags);
	strcpyW(pszOut, pszIn);
	*pcchOut = (err != E_POINTER) ? strlenW(pszOut) : 0;
	return err;
	}