Source code of Windows XP (NT5)
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//
// Mime stuff used by shell32/shdocvw/shdoc401
//
#include "priv.h"
#define TF_MIME 0
/*----------------------------------------------------------
Purpose: Generates the HKEY_CLASSES_ROOT subkey for a MIME
type
Returns:
Cond: --
*/
STDAPI_(BOOL) GetMIMETypeSubKeyA(LPCSTR pcszMIMEType, LPSTR pszSubKeyBuf, UINT cchBuf)
{
BOOL bResult;
bResult = ((UINT)lstrlenA(TEXT("MIME\\Database\\Content Type\\%s")) +
(UINT)lstrlenA(pcszMIMEType) < cchBuf);
if (bResult)
EVAL((UINT)wsprintfA(pszSubKeyBuf, TEXT("MIME\\Database\\Content Type\\%s"),
pcszMIMEType) < cchBuf);
else
{
if (cchBuf > 0)
*pszSubKeyBuf = '\0';
TraceMsg(TF_WARNING, "GetMIMETypeSubKey(): Given sub key buffer of length %u is too short to hold sub key for MIME type %hs.",
cchBuf, pcszMIMEType);
}
ASSERT(! cchBuf ||
(IS_VALID_STRING_PTRA(pszSubKeyBuf, -1) &&
(UINT)lstrlenA(pszSubKeyBuf) < cchBuf));
ASSERT(bResult ||
! cchBuf ||
! *pszSubKeyBuf);
return(bResult);
}
STDAPI_(BOOL) GetMIMETypeSubKeyW(LPCWSTR pszMIMEType, LPWSTR pszBuf, UINT cchBuf)
{
BOOL bRet;
char szMIMEType[MAX_PATH];
char sz[MAX_PATH];
ASSERT(IS_VALID_STRING_PTRW(pszMIMEType, -1));
WideCharToMultiByte(CP_ACP, 0, pszMIMEType, -1, szMIMEType, SIZECHARS(szMIMEType), NULL, NULL);
bRet = GetMIMETypeSubKeyA(szMIMEType, sz, SIZECHARS(sz));
if (bRet)
{
ASSERT(cchBuf <= SIZECHARS(sz));
MultiByteToWideChar(CP_ACP, 0, sz, -1, pszBuf, cchBuf);
}
return bRet;
}
/*
** RegisterExtensionForMIMEType()
**
** Under HKEY_CLASSES_ROOT\MIME\Database\Content Type\mime/type, add
** Content Type = mime/type and Extension = .ext.
**
*/
STDAPI_(BOOL) RegisterExtensionForMIMETypeA(LPCSTR pcszExtension, LPCSTR pcszMIMEContentType)
{
BOOL bResult;
CHAR szMIMEContentTypeSubKey[MAX_PATH];
ASSERT(IS_VALID_STRING_PTRA(pcszExtension, -1));
ASSERT(IS_VALID_STRING_PTRA(pcszMIMEContentType, -1));
ASSERT(IsValidExtensionA(pcszExtension));
bResult = GetMIMETypeSubKeyA(pcszMIMEContentType, szMIMEContentTypeSubKey,
SIZECHARS(szMIMEContentTypeSubKey));
if (bResult)
{
/* (+ 1) for null terminator. */
bResult = (NO_ERROR == SHSetValueA(HKEY_CLASSES_ROOT, szMIMEContentTypeSubKey,
"Extension", REG_SZ, pcszExtension,
CbFromCchA(lstrlenA(pcszExtension) + 1)));
}
return(bResult);
}
STDAPI_(BOOL) RegisterExtensionForMIMETypeW(LPCWSTR pcszExtension, LPCWSTR pcszMIMEContentType)
{
BOOL bResult;
WCHAR szMIMEContentTypeSubKey[MAX_PATH];
ASSERT(IS_VALID_STRING_PTRW(pcszExtension, -1));
ASSERT(IS_VALID_STRING_PTRW(pcszMIMEContentType, -1));
ASSERT(IsValidExtensionW(pcszExtension));
bResult = GetMIMETypeSubKeyW(pcszMIMEContentType, szMIMEContentTypeSubKey,
SIZECHARS(szMIMEContentTypeSubKey));
if (bResult)
{
/* (+ 1) for null terminator. */
bResult = (NO_ERROR == SHSetValueW(HKEY_CLASSES_ROOT, szMIMEContentTypeSubKey,
TEXTW("Extension"), REG_SZ, pcszExtension,
(lstrlenW(pcszExtension) + 1)*sizeof(WCHAR)));
}
return(bResult);
}
/*
** UnregisterExtensionForMIMEType()
**
** Deletes Extension under
** HKEY_CLASSES_ROOT\MIME\Database\Content Type\mime/type. If no other values
** or sub keys are left, deletes
** HKEY_CLASSES_ROOT\MIME\Database\Content Type\mime/type.
**
** Side Effects: May also delete MIME key.
*/
STDAPI_(BOOL) UnregisterExtensionForMIMETypeA(LPCSTR pcszMIMEContentType)
{
BOOL bResult;
CHAR szMIMEContentTypeSubKey[MAX_PATH];
ASSERT(IS_VALID_STRING_PTRA(pcszMIMEContentType, -1));
bResult = (GetMIMETypeSubKeyA(pcszMIMEContentType, szMIMEContentTypeSubKey,
SIZECHARS(szMIMEContentTypeSubKey)) &&
NO_ERROR == SHDeleteValueA(HKEY_CLASSES_ROOT, szMIMEContentTypeSubKey,
"Extension") &&
NO_ERROR == SHDeleteEmptyKeyA(HKEY_CLASSES_ROOT, szMIMEContentTypeSubKey));
return(bResult);
}
STDAPI_(BOOL) UnregisterExtensionForMIMETypeW(LPCWSTR pcszMIMEContentType)
{
BOOL bResult;
WCHAR szMIMEContentTypeSubKey[MAX_PATH];
ASSERT(IS_VALID_STRING_PTRW(pcszMIMEContentType, -1));
bResult = (GetMIMETypeSubKeyW(pcszMIMEContentType, szMIMEContentTypeSubKey,
SIZECHARS(szMIMEContentTypeSubKey)) &&
NO_ERROR == SHDeleteValueW(HKEY_CLASSES_ROOT, szMIMEContentTypeSubKey,
TEXTW("Extension")) &&
NO_ERROR == SHDeleteEmptyKeyW(HKEY_CLASSES_ROOT, szMIMEContentTypeSubKey));
return(bResult);
}
/*
** UnregisterMIMETypeForExtension()
**
** Deletes Content Type under HKEY_CLASSES_ROOT\.ext.
**
** Side Effects: none
*/
STDAPI_(BOOL) UnregisterMIMETypeForExtensionA(LPCSTR pcszExtension)
{
ASSERT(IS_VALID_STRING_PTRA(pcszExtension, -1));
ASSERT(IsValidExtensionA(pcszExtension));
return NO_ERROR == SHDeleteValueA(HKEY_CLASSES_ROOT, pcszExtension, "Content Type");
}
STDAPI_(BOOL) UnregisterMIMETypeForExtensionW(LPCWSTR pcszExtension)
{
ASSERT(IS_VALID_STRING_PTRW(pcszExtension, -1));
ASSERT(IsValidExtensionW(pcszExtension));
return NO_ERROR == SHDeleteValueW(HKEY_CLASSES_ROOT, pcszExtension, TEXTW("Content Type"));
}
/*
** RegisterMIMETypeForExtension()
**
** Under HKEY_CLASSES_ROOT\.ext, add Content Type = mime/type.
**
** Arguments:
**
** Returns:
**
** Side Effects: none
*/
STDAPI_(BOOL) RegisterMIMETypeForExtensionA(LPCSTR pcszExtension, LPCSTR pcszMIMEContentType)
{
ASSERT(IS_VALID_STRING_PTRA(pcszExtension, -1));
ASSERT(IS_VALID_STRING_PTRA(pcszMIMEContentType, -1));
ASSERT(IsValidExtensionA(pcszExtension));
/* (+ 1) for null terminator. */
return NO_ERROR == SHSetValueA(HKEY_CLASSES_ROOT, pcszExtension, "Content Type",
REG_SZ, pcszMIMEContentType,
CbFromCchA(lstrlenA(pcszMIMEContentType) + 1));
}
STDAPI_(BOOL) RegisterMIMETypeForExtensionW(LPCWSTR pcszExtension, LPCWSTR pcszMIMEContentType)
{
ASSERT(IS_VALID_STRING_PTRW(pcszExtension, -1));
ASSERT(IS_VALID_STRING_PTRW(pcszMIMEContentType, -1));
ASSERT(IsValidExtensionW(pcszExtension));
/* (+ 1) for null terminator. */
return NO_ERROR == SHSetValueW(HKEY_CLASSES_ROOT, pcszExtension, TEXTW("Content Type"),
REG_SZ, pcszMIMEContentType,
(lstrlenW(pcszMIMEContentType) + 1) * sizeof(WCHAR));
}
/*
** GetMIMEValue()
**
** Retrieves the data for a value of a MIME type.
**
** Arguments:
**
** Returns:
**
** Side Effects: none
*/
STDAPI_(BOOL) GetMIMEValueA(LPCSTR pcszMIMEType, LPCSTR pcszValue,
PDWORD pdwValueType, PBYTE pbyteValueBuf,
PDWORD pdwcbValueBufLen)
{
BOOL bResult;
CHAR szMIMETypeSubKey[MAX_PATH];
ASSERT(IS_VALID_STRING_PTRA(pcszMIMEType, -1));
ASSERT(! pcszValue ||
IS_VALID_STRING_PTRA(pcszValue, -1));
ASSERT(IS_VALID_WRITE_PTR(pdwValueType, DWORD));
ASSERT(IS_VALID_WRITE_BUFFER(pbyteValueBuf, BYTE, *pdwcbValueBufLen));
bResult = (GetMIMETypeSubKeyA(pcszMIMEType, szMIMETypeSubKey,SIZECHARS(szMIMETypeSubKey)) &&
NO_ERROR == SHGetValueA(HKEY_CLASSES_ROOT, szMIMETypeSubKey,
pcszValue, pdwValueType, pbyteValueBuf,
pdwcbValueBufLen));
return(bResult);
}
STDAPI_(BOOL) GetMIMEValueW(LPCWSTR pcszMIMEType, LPCWSTR pcszValue,
PDWORD pdwValueType, PBYTE pbyteValueBuf,
PDWORD pdwcbValueBufLen)
{
BOOL bResult;
WCHAR szMIMETypeSubKey[MAX_PATH];
ASSERT(IS_VALID_STRING_PTRW(pcszMIMEType, -1));
ASSERT(! pcszValue ||
IS_VALID_STRING_PTRW(pcszValue, -1));
ASSERT(IS_VALID_WRITE_PTR(pdwValueType, DWORD));
ASSERT(IS_VALID_WRITE_BUFFER(pbyteValueBuf, BYTE, *pdwcbValueBufLen));
bResult = (GetMIMETypeSubKeyW(pcszMIMEType, szMIMETypeSubKey,SIZECHARS(szMIMETypeSubKey)) &&
NO_ERROR == SHGetValueW(HKEY_CLASSES_ROOT, szMIMETypeSubKey,
pcszValue, pdwValueType, pbyteValueBuf,
pdwcbValueBufLen));
return(bResult);
}
/*
** GetMIMETypeStringValue()
**
** Retrieves the string for a registered MIME type's value.
**
** Arguments:
**
** Returns:
**
** Side Effects: none
*/
STDAPI_(BOOL) GetMIMETypeStringValueA(LPCSTR pcszMIMEType, LPCSTR pcszValue,
LPSTR pszBuf, UINT ucBufLen)
{
BOOL bResult;
DWORD dwValueType;
DWORD dwcbLen = CbFromCchA(ucBufLen);
/* GetMIMEValue() will verify parameters. */
bResult = (GetMIMEValueA(pcszMIMEType, pcszValue, &dwValueType, (PBYTE)pszBuf, &dwcbLen) &&
dwValueType == REG_SZ);
if (! bResult)
{
if (ucBufLen > 0)
*pszBuf = '\0';
}
ASSERT(! ucBufLen || IS_VALID_STRING_PTRA(pszBuf, -1));
return(bResult);
}
STDAPI_(BOOL) GetMIMETypeStringValueW(LPCWSTR pcszMIMEType, LPCWSTR pcszValue,
LPWSTR pszBuf, UINT ucBufLen)
{
BOOL bResult;
DWORD dwValueType;
DWORD dwcbLen = CbFromCchW(ucBufLen);
/* GetMIMEValue() will verify parameters. */
bResult = (GetMIMEValueW(pcszMIMEType, pcszValue, &dwValueType, (PBYTE)pszBuf, &dwcbLen) &&
dwValueType == REG_SZ);
if (! bResult)
{
if (ucBufLen > 0)
*pszBuf = '\0';
}
ASSERT(! ucBufLen || IS_VALID_STRING_PTRW(pszBuf, -1));
return(bResult);
}
/*
** MIME_GetExtension()
**
** Determines the file name extension to be used when writing a file of a MIME
** type to the file system.
**
** Arguments:
**
** Returns:
**
** Side Effects: none
*/
STDAPI_(BOOL) MIME_GetExtensionA(LPCSTR pcszMIMEType, LPSTR pszExtensionBuf, UINT ucExtensionBufLen)
{
BOOL bResult = FALSE;
ASSERT(IS_VALID_STRING_PTRA(pcszMIMEType, -1));
ASSERT(IS_VALID_WRITE_BUFFER(pszExtensionBuf, CHAR, ucExtensionBufLen));
if (EVAL(ucExtensionBufLen > 2))
{
/* Leave room for possible leading period. */
if (GetMIMETypeStringValueA(pcszMIMEType, "Extension", pszExtensionBuf + 1, ucExtensionBufLen - 1))
{
if (pszExtensionBuf[1])
{
/* Prepend period if necessary. */
if (pszExtensionBuf[1] == TEXT('.'))
/* (+ 1) for null terminator. */
MoveMemory(pszExtensionBuf, pszExtensionBuf + 1,
CbFromCchA(lstrlenA(pszExtensionBuf + 1) + 1));
else
pszExtensionBuf[0] = TEXT('.');
bResult = TRUE;
}
}
}
if (! bResult)
{
if (ucExtensionBufLen > 0)
*pszExtensionBuf = '\0';
}
if (bResult)
TraceMsgA(TF_MIME, "MIME_GetExtension(): Extension %s registered as default extension for MIME type %s.",
pszExtensionBuf, pcszMIMEType);
ASSERT((bResult &&
IsValidExtensionA(pszExtensionBuf)) ||
(! bResult &&
(! ucExtensionBufLen ||
! *pszExtensionBuf)));
ASSERT(! ucExtensionBufLen ||
(UINT)lstrlenA(pszExtensionBuf) < ucExtensionBufLen);
return(bResult);
}
STDAPI_(BOOL) MIME_GetExtensionW(LPCWSTR pcszMIMEType, LPWSTR pszExtensionBuf, UINT ucExtensionBufLen)
{
BOOL bResult = FALSE;
ASSERT(IS_VALID_STRING_PTRW(pcszMIMEType, -1));
ASSERT(IS_VALID_WRITE_BUFFER(pszExtensionBuf, CHAR, ucExtensionBufLen));
if (EVAL(ucExtensionBufLen > 2))
{
/* Leave room for possible leading period. */
if (GetMIMETypeStringValueW(pcszMIMEType, TEXTW("Extension"), pszExtensionBuf + 1, ucExtensionBufLen - 1))
{
if (pszExtensionBuf[1])
{
/* Prepend period if necessary. */
if (pszExtensionBuf[1] == TEXT('.'))
/* (+ 1) for null terminator. */
MoveMemory(pszExtensionBuf, pszExtensionBuf + 1,
CbFromCchW(lstrlenW(pszExtensionBuf + 1) + 1));
else
pszExtensionBuf[0] = TEXT('.');
bResult = TRUE;
}
}
}
if (! bResult)
{
if (ucExtensionBufLen > 0)
*pszExtensionBuf = '\0';
}
if (bResult)
TraceMsgW(TF_MIME, "MIME_GetExtension(): Extension %s registered as default extension for MIME type %s.",
pszExtensionBuf, pcszMIMEType);
ASSERT((bResult &&
IsValidExtensionW(pszExtensionBuf)) ||
(! bResult &&
(! ucExtensionBufLen ||
! *pszExtensionBuf)));
ASSERT(! ucExtensionBufLen ||
(UINT)lstrlenW(pszExtensionBuf) < ucExtensionBufLen);
return(bResult);
}