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dolphin/Externals/wxWidgets/src/msw/registry.cpp
bushing 9146b9b261 set svn:eol-style=native for Externals/**.cpp 
git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@1440 8ced0084-cf51-0410-be5f-012b33b47a6e
2008-12-08 05:17:03 +00:00

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///////////////////////////////////////////////////////////////////////////////
// Name: src/msw/registry.cpp
// Purpose: implementation of registry classes and functions
// Author: Vadim Zeitlin
// Modified by:
// Created: 03.04.98
// RCS-ID: $Id: registry.cpp 47482 2007-07-15 14:12:08Z VS $
// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
// Licence: wxWindows licence
// TODO: - parsing of registry key names
// - support of other (than REG_SZ/REG_DWORD) registry types
// - add high level functions (RegisterOleServer, ...)
///////////////////////////////////////////////////////////////////////////////
// for compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/msw/wrapwin.h"
#include "wx/string.h"
#include "wx/intl.h"
#include "wx/log.h"
#endif
#include "wx/file.h"
#include "wx/wfstream.h"
// Windows headers
#ifdef __WXWINCE__
#include "wx/msw/private.h"
#include <winbase.h>
#include <winreg.h>
#endif
// other std headers
#include <stdlib.h> // for _MAX_PATH
#ifndef _MAX_PATH
#define _MAX_PATH 512
#endif
// our header
#define HKEY_DEFINED // already defined in windows.h
#include "wx/msw/registry.h"
// some registry functions don't like signed chars
typedef unsigned char *RegString;
typedef BYTE* RegBinary;
#ifndef HKEY_PERFORMANCE_DATA
#define HKEY_PERFORMANCE_DATA ((HKEY)0x80000004)
#endif
#ifndef HKEY_CURRENT_CONFIG
#define HKEY_CURRENT_CONFIG ((HKEY)0x80000005)
#endif
#ifndef HKEY_DYN_DATA
#define HKEY_DYN_DATA ((HKEY)0x80000006)
#endif
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
// the standard key names, short names and handles all bundled together for
// convenient access
static struct
{
HKEY hkey;
const wxChar *szName;
const wxChar *szShortName;
}
aStdKeys[] =
{
{ HKEY_CLASSES_ROOT, wxT("HKEY_CLASSES_ROOT"), wxT("HKCR") },
{ HKEY_CURRENT_USER, wxT("HKEY_CURRENT_USER"), wxT("HKCU") },
{ HKEY_LOCAL_MACHINE, wxT("HKEY_LOCAL_MACHINE"), wxT("HKLM") },
{ HKEY_USERS, wxT("HKEY_USERS"), wxT("HKU") }, // short name?
{ HKEY_PERFORMANCE_DATA, wxT("HKEY_PERFORMANCE_DATA"), wxT("HKPD") },
{ HKEY_CURRENT_CONFIG, wxT("HKEY_CURRENT_CONFIG"), wxT("HKCC") },
{ HKEY_DYN_DATA, wxT("HKEY_DYN_DATA"), wxT("HKDD") }, // short name?
};
// the registry name separator (perhaps one day MS will change it to '/' ;-)
#define REG_SEPARATOR wxT('\\')
// useful for Windows programmers: makes somewhat more clear all these zeroes
// being passed to Windows APIs
#define RESERVED (0)
// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------
// const_cast<> is not yet supported by all compilers
#define CONST_CAST ((wxRegKey *)this)->
// and neither is mutable which m_dwLastError should be
#define m_dwLastError CONST_CAST m_dwLastError
// ----------------------------------------------------------------------------
// non member functions
// ----------------------------------------------------------------------------
// removes the trailing backslash from the string if it has one
static inline void RemoveTrailingSeparator(wxString& str);
// returns true if given registry key exists
static bool KeyExists(WXHKEY hRootKey, const wxChar *szKey);
// combines value and key name (uses static buffer!)
static const wxChar *GetFullName(const wxRegKey *pKey,
const wxChar *szValue = NULL);
static inline const wxChar *RegValueStr(const wxChar *szValue)
{
return wxIsEmpty(szValue) ? NULL : szValue;
}
// ============================================================================
// implementation of wxRegKey class
// ============================================================================
// ----------------------------------------------------------------------------
// static functions and variables
// ----------------------------------------------------------------------------
const size_t wxRegKey::nStdKeys = WXSIZEOF(aStdKeys);
// @@ should take a `StdKey key', but as it's often going to be used in loops
// it would require casts in user code.
const wxChar *wxRegKey::GetStdKeyName(size_t key)
{
// return empty string if key is invalid
wxCHECK_MSG( key < nStdKeys, wxEmptyString, wxT("invalid key in wxRegKey::GetStdKeyName") );
return aStdKeys[key].szName;
}
const wxChar *wxRegKey::GetStdKeyShortName(size_t key)
{
// return empty string if key is invalid
wxCHECK( key < nStdKeys, wxEmptyString );
return aStdKeys[key].szShortName;
}
wxRegKey::StdKey wxRegKey::ExtractKeyName(wxString& strKey)
{
wxString strRoot = strKey.BeforeFirst(REG_SEPARATOR);
size_t ui;
for ( ui = 0; ui < nStdKeys; ui++ ) {
if ( strRoot.CmpNoCase(aStdKeys[ui].szName) == 0 ||
strRoot.CmpNoCase(aStdKeys[ui].szShortName) == 0 ) {
break;
}
}
if ( ui == nStdKeys ) {
wxFAIL_MSG(wxT("invalid key prefix in wxRegKey::ExtractKeyName."));
ui = HKCR;
}
else {
strKey = strKey.After(REG_SEPARATOR);
if ( !strKey.empty() && strKey.Last() == REG_SEPARATOR )
strKey.Truncate(strKey.Len() - 1);
}
return (StdKey)ui;
}
wxRegKey::StdKey wxRegKey::GetStdKeyFromHkey(WXHKEY hkey)
{
for ( size_t ui = 0; ui < nStdKeys; ui++ ) {
if ( aStdKeys[ui].hkey == (HKEY)hkey )
return (StdKey)ui;
}
wxFAIL_MSG(wxT("non root hkey passed to wxRegKey::GetStdKeyFromHkey."));
return HKCR;
}
// ----------------------------------------------------------------------------
// ctors and dtor
// ----------------------------------------------------------------------------
wxRegKey::wxRegKey()
{
m_hRootKey = (WXHKEY) aStdKeys[HKCR].hkey;
Init();
}
wxRegKey::wxRegKey(const wxString& strKey) : m_strKey(strKey)
{
m_hRootKey = (WXHKEY) aStdKeys[ExtractKeyName(m_strKey)].hkey;
Init();
}
// parent is a predefined (and preopened) key
wxRegKey::wxRegKey(StdKey keyParent, const wxString& strKey) : m_strKey(strKey)
{
RemoveTrailingSeparator(m_strKey);
m_hRootKey = (WXHKEY) aStdKeys[keyParent].hkey;
Init();
}
// parent is a normal regkey
wxRegKey::wxRegKey(const wxRegKey& keyParent, const wxString& strKey)
: m_strKey(keyParent.m_strKey)
{
// combine our name with parent's to get the full name
if ( !m_strKey.empty() &&
(strKey.empty() || strKey[0] != REG_SEPARATOR) ) {
m_strKey += REG_SEPARATOR;
}
m_strKey += strKey;
RemoveTrailingSeparator(m_strKey);
m_hRootKey = keyParent.m_hRootKey;
Init();
}
// dtor closes the key releasing system resource
wxRegKey::~wxRegKey()
{
Close();
}
// ----------------------------------------------------------------------------
// change the key name/hkey
// ----------------------------------------------------------------------------
// set the full key name
void wxRegKey::SetName(const wxString& strKey)
{
Close();
m_strKey = strKey;
m_hRootKey = (WXHKEY) aStdKeys[ExtractKeyName(m_strKey)].hkey;
}
// the name is relative to the parent key
void wxRegKey::SetName(StdKey keyParent, const wxString& strKey)
{
Close();
m_strKey = strKey;
RemoveTrailingSeparator(m_strKey);
m_hRootKey = (WXHKEY) aStdKeys[keyParent].hkey;
}
// the name is relative to the parent key
void wxRegKey::SetName(const wxRegKey& keyParent, const wxString& strKey)
{
Close();
// combine our name with parent's to get the full name
// NB: this method is called by wxRegConfig::SetPath() which is a performance
// critical function and so it preallocates space for our m_strKey to
// gain some speed - this is why we only use += here and not = which
// would just free the prealloc'd buffer and would have to realloc it the
// next line!
m_strKey.clear();
m_strKey += keyParent.m_strKey;
if ( !strKey.empty() && strKey[0] != REG_SEPARATOR )
m_strKey += REG_SEPARATOR;
m_strKey += strKey;
RemoveTrailingSeparator(m_strKey);
m_hRootKey = keyParent.m_hRootKey;
}
// hKey should be opened and will be closed in wxRegKey dtor
void wxRegKey::SetHkey(WXHKEY hKey)
{
Close();
m_hKey = hKey;
}
// ----------------------------------------------------------------------------
// info about the key
// ----------------------------------------------------------------------------
// returns true if the key exists
bool wxRegKey::Exists() const
{
// opened key has to exist, try to open it if not done yet
return IsOpened() ? true : KeyExists(m_hRootKey, m_strKey);
}
// returns the full name of the key (prefix is abbreviated if bShortPrefix)
wxString wxRegKey::GetName(bool bShortPrefix) const
{
StdKey key = GetStdKeyFromHkey((WXHKEY) m_hRootKey);
wxString str = bShortPrefix ? aStdKeys[key].szShortName
: aStdKeys[key].szName;
if ( !m_strKey.empty() )
str << _T("\\") << m_strKey;
return str;
}
bool wxRegKey::GetKeyInfo(size_t *pnSubKeys,
size_t *pnMaxKeyLen,
size_t *pnValues,
size_t *pnMaxValueLen) const
{
// old gcc headers incorrectly prototype RegQueryInfoKey()
#if defined(__GNUWIN32_OLD__) && !defined(__CYGWIN10__)
#define REG_PARAM (size_t *)
#else
#define REG_PARAM (LPDWORD)
#endif
// it might be unexpected to some that this function doesn't open the key
wxASSERT_MSG( IsOpened(), _T("key should be opened in GetKeyInfo") );
m_dwLastError = ::RegQueryInfoKey
(
(HKEY) m_hKey,
NULL, // class name
NULL, // (ptr to) size of class name buffer
RESERVED,
REG_PARAM
pnSubKeys, // [out] number of subkeys
REG_PARAM
pnMaxKeyLen, // [out] max length of a subkey name
NULL, // longest subkey class name
REG_PARAM
pnValues, // [out] number of values
REG_PARAM
pnMaxValueLen, // [out] max length of a value name
NULL, // longest value data
NULL, // security descriptor
NULL // time of last modification
);
#undef REG_PARAM
if ( m_dwLastError != ERROR_SUCCESS ) {
wxLogSysError(m_dwLastError, _("Can't get info about registry key '%s'"),
GetName().c_str());
return false;
}
return true;
}
// ----------------------------------------------------------------------------
// operations
// ----------------------------------------------------------------------------
// opens key (it's not an error to call Open() on an already opened key)
bool wxRegKey::Open(AccessMode mode)
{
if ( IsOpened() )
{
if ( mode <= m_mode )
return true;
// we had been opened in read mode but now must be reopened in write
Close();
}
HKEY tmpKey;
m_dwLastError = ::RegOpenKeyEx
(
(HKEY) m_hRootKey,
m_strKey,
RESERVED,
mode == Read ? KEY_READ : KEY_ALL_ACCESS,
&tmpKey
);
if ( m_dwLastError != ERROR_SUCCESS )
{
wxLogSysError(m_dwLastError, _("Can't open registry key '%s'"),
GetName().c_str());
return false;
}
m_hKey = (WXHKEY) tmpKey;
m_mode = mode;
return true;
}
// creates key, failing if it exists and !bOkIfExists
bool wxRegKey::Create(bool bOkIfExists)
{
// check for existence only if asked (i.e. order is important!)
if ( !bOkIfExists && Exists() )
return false;
if ( IsOpened() )
return true;
HKEY tmpKey;
#ifdef __WXWINCE__
DWORD disposition;
m_dwLastError = RegCreateKeyEx((HKEY) m_hRootKey, m_strKey,
NULL, // reserved
NULL, // class string
0,
0,
NULL,
&tmpKey,
&disposition);
#else
m_dwLastError = RegCreateKey((HKEY) m_hRootKey, m_strKey, &tmpKey);
#endif
if ( m_dwLastError != ERROR_SUCCESS ) {
wxLogSysError(m_dwLastError, _("Can't create registry key '%s'"),
GetName().c_str());
return false;
}
else
{
m_hKey = (WXHKEY) tmpKey;
return true;
}
}
// close the key, it's not an error to call it when not opened
bool wxRegKey::Close()
{
if ( IsOpened() ) {
m_dwLastError = RegCloseKey((HKEY) m_hKey);
m_hKey = 0;
if ( m_dwLastError != ERROR_SUCCESS ) {
wxLogSysError(m_dwLastError, _("Can't close registry key '%s'"),
GetName().c_str());
return false;
}
}
return true;
}
bool wxRegKey::RenameValue(const wxChar *szValueOld, const wxChar *szValueNew)
{
bool ok = true;
if ( HasValue(szValueNew) ) {
wxLogError(_("Registry value '%s' already exists."), szValueNew);
ok = false;
}
if ( !ok ||
!CopyValue(szValueOld, *this, szValueNew) ||
!DeleteValue(szValueOld) ) {
wxLogError(_("Failed to rename registry value '%s' to '%s'."),
szValueOld, szValueNew);
return false;
}
return true;
}
bool wxRegKey::CopyValue(const wxChar *szValue,
wxRegKey& keyDst,
const wxChar *szValueNew)
{
if ( wxIsEmpty(szValueNew) ) {
// by default, use the same name
szValueNew = szValue;
}
switch ( GetValueType(szValue) ) {
case Type_String:
{
wxString strVal;
return QueryValue(szValue, strVal) &&
keyDst.SetValue(szValueNew, strVal);
}
case Type_Dword:
/* case Type_Dword_little_endian: == Type_Dword */
{
long dwVal;
return QueryValue(szValue, &dwVal) &&
keyDst.SetValue(szValueNew, dwVal);
}
case Type_Binary:
{
wxMemoryBuffer buf;
return QueryValue(szValue,buf) &&
keyDst.SetValue(szValueNew,buf);
}
// these types are unsupported because I am not sure about how
// exactly they should be copied and because they shouldn't
// occur among the application keys (supposedly created with
// this class)
case Type_None:
case Type_Expand_String:
case Type_Dword_big_endian:
case Type_Link:
case Type_Multi_String:
case Type_Resource_list:
case Type_Full_resource_descriptor:
case Type_Resource_requirements_list:
default:
wxLogError(_("Can't copy values of unsupported type %d."),
GetValueType(szValue));
return false;
}
}
bool wxRegKey::Rename(const wxChar *szNewName)
{
wxCHECK_MSG( !m_strKey.empty(), false, _T("registry hives can't be renamed") );
if ( !Exists() ) {
wxLogError(_("Registry key '%s' does not exist, cannot rename it."),
GetFullName(this));
return false;
}
// do we stay in the same hive?
bool inSameHive = !wxStrchr(szNewName, REG_SEPARATOR);
// construct the full new name of the key
wxRegKey keyDst;
if ( inSameHive ) {
// rename the key to the new name under the same parent
wxString strKey = m_strKey.BeforeLast(REG_SEPARATOR);
if ( !strKey.empty() ) {
// don't add '\\' in the start if strFullNewName is empty
strKey += REG_SEPARATOR;
}
strKey += szNewName;
keyDst.SetName(GetStdKeyFromHkey(m_hRootKey), strKey);
}
else {
// this is the full name already
keyDst.SetName(szNewName);
}
bool ok = keyDst.Create(false /* fail if alredy exists */);
if ( !ok ) {
wxLogError(_("Registry key '%s' already exists."),
GetFullName(&keyDst));
}
else {
ok = Copy(keyDst) && DeleteSelf();
}
if ( !ok ) {
wxLogError(_("Failed to rename the registry key '%s' to '%s'."),
GetFullName(this), GetFullName(&keyDst));
}
else {
m_hRootKey = keyDst.m_hRootKey;
m_strKey = keyDst.m_strKey;
}
return ok;
}
bool wxRegKey::Copy(const wxChar *szNewName)
{
// create the new key first
wxRegKey keyDst(szNewName);
bool ok = keyDst.Create(false /* fail if alredy exists */);
if ( ok ) {
ok = Copy(keyDst);
// we created the dest key but copying to it failed - delete it
if ( !ok ) {
(void)keyDst.DeleteSelf();
}
}
return ok;
}
bool wxRegKey::Copy(wxRegKey& keyDst)
{
bool ok = true;
// copy all sub keys to the new location
wxString strKey;
long lIndex;
bool bCont = GetFirstKey(strKey, lIndex);
while ( ok && bCont ) {
wxRegKey key(*this, strKey);
wxString keyName;
keyName << GetFullName(&keyDst) << REG_SEPARATOR << strKey;
ok = key.Copy((const wxChar*) keyName);
if ( ok )
bCont = GetNextKey(strKey, lIndex);
else
wxLogError(_("Failed to copy the registry subkey '%s' to '%s'."),
GetFullName(&key), keyName.c_str());
}
// copy all values
wxString strVal;
bCont = GetFirstValue(strVal, lIndex);
while ( ok && bCont ) {
ok = CopyValue(strVal, keyDst);
if ( !ok ) {
wxLogSysError(m_dwLastError,
_("Failed to copy registry value '%s'"),
strVal.c_str());
}
else {
bCont = GetNextValue(strVal, lIndex);
}
}
if ( !ok ) {
wxLogError(_("Failed to copy the contents of registry key '%s' to '%s'."),
GetFullName(this), GetFullName(&keyDst));
}
return ok;
}
// ----------------------------------------------------------------------------
// delete keys/values
// ----------------------------------------------------------------------------
bool wxRegKey::DeleteSelf()
{
{
wxLogNull nolog;
if ( !Open() ) {
// it already doesn't exist - ok!
return true;
}
}
// prevent a buggy program from erasing one of the root registry keys or an
// immediate subkey (i.e. one which doesn't have '\\' inside) of any other
// key except HKCR (HKCR has some "deleteable" subkeys)
if ( m_strKey.empty() ||
((m_hRootKey != (WXHKEY) aStdKeys[HKCR].hkey) &&
(m_strKey.Find(REG_SEPARATOR) == wxNOT_FOUND)) ) {
wxLogError(_("Registry key '%s' is needed for normal system operation,\ndeleting it will leave your system in unusable state:\noperation aborted."),
GetFullName(this));
return false;
}
// we can't delete keys while enumerating because it confuses GetNextKey, so
// we first save the key names and then delete them all
wxArrayString astrSubkeys;
wxString strKey;
long lIndex;
bool bCont = GetFirstKey(strKey, lIndex);
while ( bCont ) {
astrSubkeys.Add(strKey);
bCont = GetNextKey(strKey, lIndex);
}
size_t nKeyCount = astrSubkeys.Count();
for ( size_t nKey = 0; nKey < nKeyCount; nKey++ ) {
wxRegKey key(*this, astrSubkeys[nKey]);
if ( !key.DeleteSelf() )
return false;
}
// now delete this key itself
Close();
m_dwLastError = RegDeleteKey((HKEY) m_hRootKey, m_strKey);
// deleting a key which doesn't exist is not considered an error
if ( m_dwLastError != ERROR_SUCCESS &&
m_dwLastError != ERROR_FILE_NOT_FOUND ) {
wxLogSysError(m_dwLastError, _("Can't delete key '%s'"),
GetName().c_str());
return false;
}
return true;
}
bool wxRegKey::DeleteKey(const wxChar *szKey)
{
if ( !Open() )
return false;
wxRegKey key(*this, szKey);
return key.DeleteSelf();
}
bool wxRegKey::DeleteValue(const wxChar *szValue)
{
if ( !Open() )
return false;
m_dwLastError = RegDeleteValue((HKEY) m_hKey, RegValueStr(szValue));
// deleting a value which doesn't exist is not considered an error
if ( (m_dwLastError != ERROR_SUCCESS) &&
(m_dwLastError != ERROR_FILE_NOT_FOUND) )
{
wxLogSysError(m_dwLastError, _("Can't delete value '%s' from key '%s'"),
szValue, GetName().c_str());
return false;
}
return true;
}
// ----------------------------------------------------------------------------
// access to values and subkeys
// ----------------------------------------------------------------------------
// return true if value exists
bool wxRegKey::HasValue(const wxChar *szValue) const
{
// this function should be silent, so suppress possible messages from Open()
wxLogNull nolog;
if ( !CONST_CAST Open(Read) )
return false;
LONG dwRet = ::RegQueryValueEx((HKEY) m_hKey,
RegValueStr(szValue),
RESERVED,
NULL, NULL, NULL);
return dwRet == ERROR_SUCCESS;
}
// returns true if this key has any values
bool wxRegKey::HasValues() const
{
// suppress possible messages from GetFirstValue()
wxLogNull nolog;
// just call GetFirstValue with dummy parameters
wxString str;
long l;
return CONST_CAST GetFirstValue(str, l);
}
// returns true if this key has any subkeys
bool wxRegKey::HasSubkeys() const
{
// suppress possible messages from GetFirstKey()
wxLogNull nolog;
// just call GetFirstKey with dummy parameters
wxString str;
long l;
return CONST_CAST GetFirstKey(str, l);
}
// returns true if given subkey exists
bool wxRegKey::HasSubKey(const wxChar *szKey) const
{
// this function should be silent, so suppress possible messages from Open()
wxLogNull nolog;
if ( !CONST_CAST Open(Read) )
return false;
return KeyExists(m_hKey, szKey);
}
wxRegKey::ValueType wxRegKey::GetValueType(const wxChar *szValue) const
{
if ( ! CONST_CAST Open(Read) )
return Type_None;
DWORD dwType;
m_dwLastError = RegQueryValueEx((HKEY) m_hKey, RegValueStr(szValue), RESERVED,
&dwType, NULL, NULL);
if ( m_dwLastError != ERROR_SUCCESS ) {
wxLogSysError(m_dwLastError, _("Can't read value of key '%s'"),
GetName().c_str());
return Type_None;
}
return (ValueType)dwType;
}
bool wxRegKey::SetValue(const wxChar *szValue, long lValue)
{
if ( CONST_CAST Open() ) {
m_dwLastError = RegSetValueEx((HKEY) m_hKey, RegValueStr(szValue), (DWORD) RESERVED, REG_DWORD,
(RegString)&lValue, sizeof(lValue));
if ( m_dwLastError == ERROR_SUCCESS )
return true;
}
wxLogSysError(m_dwLastError, _("Can't set value of '%s'"),
GetFullName(this, szValue));
return false;
}
bool wxRegKey::QueryValue(const wxChar *szValue, long *plValue) const
{
if ( CONST_CAST Open(Read) ) {
DWORD dwType, dwSize = sizeof(DWORD);
RegString pBuf = (RegString)plValue;
m_dwLastError = RegQueryValueEx((HKEY) m_hKey, RegValueStr(szValue), RESERVED,
&dwType, pBuf, &dwSize);
if ( m_dwLastError != ERROR_SUCCESS ) {
wxLogSysError(m_dwLastError, _("Can't read value of key '%s'"),
GetName().c_str());
return false;
}
else {
// check that we read the value of right type
wxASSERT_MSG( IsNumericValue(szValue),
wxT("Type mismatch in wxRegKey::QueryValue().") );
return true;
}
}
else
return false;
}
bool wxRegKey::SetValue(const wxChar *szValue,const wxMemoryBuffer& buffer)
{
#ifdef __TWIN32__
wxFAIL_MSG("RegSetValueEx not implemented by TWIN32");
return false;
#else
if ( CONST_CAST Open() ) {
m_dwLastError = RegSetValueEx((HKEY) m_hKey, RegValueStr(szValue), (DWORD) RESERVED, REG_BINARY,
(RegBinary)buffer.GetData(),buffer.GetDataLen());
if ( m_dwLastError == ERROR_SUCCESS )
return true;
}
wxLogSysError(m_dwLastError, _("Can't set value of '%s'"),
GetFullName(this, szValue));
return false;
#endif
}
bool wxRegKey::QueryValue(const wxChar *szValue, wxMemoryBuffer& buffer) const
{
if ( CONST_CAST Open(Read) ) {
// first get the type and size of the data
DWORD dwType, dwSize;
m_dwLastError = RegQueryValueEx((HKEY) m_hKey, RegValueStr(szValue), RESERVED,
&dwType, NULL, &dwSize);
if ( m_dwLastError == ERROR_SUCCESS ) {
if ( dwSize ) {
const RegBinary pBuf = (RegBinary)buffer.GetWriteBuf(dwSize);
m_dwLastError = RegQueryValueEx((HKEY) m_hKey,
RegValueStr(szValue),
RESERVED,
&dwType,
pBuf,
&dwSize);
buffer.UngetWriteBuf(dwSize);
} else {
buffer.SetDataLen(0);
}
}
if ( m_dwLastError != ERROR_SUCCESS ) {
wxLogSysError(m_dwLastError, _("Can't read value of key '%s'"),
GetName().c_str());
return false;
}
return true;
}
return false;
}
bool wxRegKey::QueryValue(const wxChar *szValue,
wxString& strValue,
bool WXUNUSED_IN_WINCE(raw)) const
{
if ( CONST_CAST Open(Read) )
{
// first get the type and size of the data
DWORD dwType=REG_NONE, dwSize=0;
m_dwLastError = RegQueryValueEx((HKEY) m_hKey,
RegValueStr(szValue),
RESERVED,
&dwType, NULL, &dwSize);
if ( m_dwLastError == ERROR_SUCCESS )
{
if ( !dwSize )
{
// must treat this case specially as GetWriteBuf() doesn't like
// being called with 0 size
strValue.Empty();
}
else
{
m_dwLastError = RegQueryValueEx((HKEY) m_hKey,
RegValueStr(szValue),
RESERVED,
&dwType,
(RegString)(wxChar*)wxStringBuffer(strValue, dwSize),
&dwSize);
// expand the var expansions in the string unless disabled
#ifndef __WXWINCE__
if ( (dwType == REG_EXPAND_SZ) && !raw )
{
DWORD dwExpSize = ::ExpandEnvironmentStrings(strValue, NULL, 0);
bool ok = dwExpSize != 0;
if ( ok )
{
wxString strExpValue;
ok = ::ExpandEnvironmentStrings(strValue,
wxStringBuffer(strExpValue, dwExpSize),
dwExpSize
) != 0;
strValue = strExpValue;
}
if ( !ok )
{
wxLogLastError(_T("ExpandEnvironmentStrings"));
}
}
#endif
// __WXWINCE__
}
if ( m_dwLastError == ERROR_SUCCESS )
{
// check that it was the right type
wxASSERT_MSG( !IsNumericValue(szValue),
wxT("Type mismatch in wxRegKey::QueryValue().") );
return true;
}
}
}
wxLogSysError(m_dwLastError, _("Can't read value of '%s'"),
GetFullName(this, szValue));
return false;
}
bool wxRegKey::SetValue(const wxChar *szValue, const wxString& strValue)
{
if ( CONST_CAST Open() ) {
m_dwLastError = RegSetValueEx((HKEY) m_hKey, RegValueStr(szValue),
(DWORD) RESERVED, REG_SZ,
(RegString)strValue.c_str(),
(strValue.Len() + 1)*sizeof(wxChar));
if ( m_dwLastError == ERROR_SUCCESS )
return true;
}
wxLogSysError(m_dwLastError, _("Can't set value of '%s'"),
GetFullName(this, szValue));
return false;
}
wxString wxRegKey::QueryDefaultValue() const
{
wxString str;
QueryValue(NULL, str);
return str;
}
// ----------------------------------------------------------------------------
// enumeration
// NB: all these functions require an index variable which allows to have
// several concurrently running indexations on the same key
// ----------------------------------------------------------------------------
bool wxRegKey::GetFirstValue(wxString& strValueName, long& lIndex)
{
if ( !Open(Read) )
return false;
lIndex = 0;
return GetNextValue(strValueName, lIndex);
}
bool wxRegKey::GetNextValue(wxString& strValueName, long& lIndex) const
{
wxASSERT( IsOpened() );
// are we already at the end of enumeration?
if ( lIndex == -1 )
return false;
wxChar szValueName[1024]; // @@ use RegQueryInfoKey...
DWORD dwValueLen = WXSIZEOF(szValueName);
m_dwLastError = RegEnumValue((HKEY) m_hKey, lIndex++,
szValueName, &dwValueLen,
RESERVED,
NULL, // [out] type
NULL, // [out] buffer for value
NULL); // [i/o] it's length
if ( m_dwLastError != ERROR_SUCCESS ) {
if ( m_dwLastError == ERROR_NO_MORE_ITEMS ) {
m_dwLastError = ERROR_SUCCESS;
lIndex = -1;
}
else {
wxLogSysError(m_dwLastError, _("Can't enumerate values of key '%s'"),
GetName().c_str());
}
return false;
}
strValueName = szValueName;
return true;
}
bool wxRegKey::GetFirstKey(wxString& strKeyName, long& lIndex)
{
if ( !Open(Read) )
return false;
lIndex = 0;
return GetNextKey(strKeyName, lIndex);
}
bool wxRegKey::GetNextKey(wxString& strKeyName, long& lIndex) const
{
wxASSERT( IsOpened() );
// are we already at the end of enumeration?
if ( lIndex == -1 )
return false;
wxChar szKeyName[_MAX_PATH + 1];
#ifdef __WXWINCE__
DWORD sizeName = WXSIZEOF(szKeyName);
m_dwLastError = RegEnumKeyEx((HKEY) m_hKey, lIndex++, szKeyName, & sizeName,
0, NULL, NULL, NULL);
#else
m_dwLastError = RegEnumKey((HKEY) m_hKey, lIndex++, szKeyName, WXSIZEOF(szKeyName));
#endif
if ( m_dwLastError != ERROR_SUCCESS ) {
if ( m_dwLastError == ERROR_NO_MORE_ITEMS ) {
m_dwLastError = ERROR_SUCCESS;
lIndex = -1;
}
else {
wxLogSysError(m_dwLastError, _("Can't enumerate subkeys of key '%s'"),
GetName().c_str());
}
return false;
}
strKeyName = szKeyName;
return true;
}
// returns true if the value contains a number (else it's some string)
bool wxRegKey::IsNumericValue(const wxChar *szValue) const
{
ValueType type = GetValueType(szValue);
switch ( type ) {
case Type_Dword:
/* case Type_Dword_little_endian: == Type_Dword */
case Type_Dword_big_endian:
return true;
default:
return false;
}
}
// ----------------------------------------------------------------------------
// exporting registry keys to file
// ----------------------------------------------------------------------------
#if wxUSE_STREAMS
// helper functions for writing ASCII strings (even in Unicode build)
static inline bool WriteAsciiChar(wxOutputStream& ostr, char ch)
{
ostr.PutC(ch);
return ostr.IsOk();
}
static inline bool WriteAsciiEOL(wxOutputStream& ostr)
{
// as we open the file in text mode, it is enough to write LF without CR
return WriteAsciiChar(ostr, '\n');
}
static inline bool WriteAsciiString(wxOutputStream& ostr, const char *p)
{
return ostr.Write(p, strlen(p)).IsOk();
}
static inline bool WriteAsciiString(wxOutputStream& ostr, const wxString& s)
{
#if wxUSE_UNICODE
wxCharBuffer name(s.mb_str());
ostr.Write(name, strlen(name));
#else
ostr.Write(s, s.length());
#endif
return ostr.IsOk();
}
#endif // wxUSE_STREAMS
bool wxRegKey::Export(const wxString& filename) const
{
#if wxUSE_FFILE && wxUSE_STREAMS
if ( wxFile::Exists(filename) )
{
wxLogError(_("Exporting registry key: file \"%s\" already exists and won't be overwritten."),
filename.c_str());
return false;
}
wxFFileOutputStream ostr(filename, _T("w"));
return ostr.Ok() && Export(ostr);
#else
wxUnusedVar(filename);
return false;
#endif
}
#if wxUSE_STREAMS
bool wxRegKey::Export(wxOutputStream& ostr) const
{
// write out the header
if ( !WriteAsciiString(ostr, "REGEDIT4\n\n") )
return false;
return DoExport(ostr);
}
#endif // wxUSE_STREAMS
static
wxString
FormatAsHex(const void *data,
size_t size,
wxRegKey::ValueType type = wxRegKey::Type_Binary)
{
wxString value(_T("hex"));
// binary values use just "hex:" prefix while the other ones must indicate
// the real type
if ( type != wxRegKey::Type_Binary )
value << _T('(') << type << _T(')');
value << _T(':');
// write all the rest as comma-separated bytes
value.reserve(3*size + 10);
const char * const p = wx_static_cast(const char *, data);
for ( size_t n = 0; n < size; n++ )
{
// TODO: line wrapping: although not required by regedit, this makes
// the generated files easier to read and compare with the files
// produced by regedit
if ( n )
value << _T(',');
value << wxString::Format(_T("%02x"), (unsigned char)p[n]);
}
return value;
}
static inline
wxString FormatAsHex(const wxString& value, wxRegKey::ValueType type)
{
return FormatAsHex(value.c_str(), value.length() + 1, type);
}
wxString wxRegKey::FormatValue(const wxString& name) const
{
wxString rhs;
const ValueType type = GetValueType(name);
switch ( type )
{
case Type_String:
{
wxString value;
if ( !QueryValue(name, value) )
break;
// quotes and backslashes must be quoted, linefeeds are not
// allowed in string values
rhs.reserve(value.length() + 2);
rhs = _T('"');
// there can be no NULs here
bool useHex = false;
for ( const wxChar *p = value.c_str(); *p && !useHex; p++ )
{
switch ( *p )
{
case _T('\n'):
// we can only represent this string in hex
useHex = true;
break;
case _T('"'):
case _T('\\'):
// escape special symbol
rhs += _T('\\');
// fall through
default:
rhs += *p;
}
}
if ( useHex )
rhs = FormatAsHex(value, Type_String);
else
rhs += _T('"');
}
break;
case Type_Dword:
/* case Type_Dword_little_endian: == Type_Dword */
{
long value;
if ( !QueryValue(name, &value) )
break;
rhs.Printf(_T("dword:%08x"), (unsigned int)value);
}
break;
case Type_Expand_String:
case Type_Multi_String:
{
wxString value;
if ( !QueryRawValue(name, value) )
break;
rhs = FormatAsHex(value, type);
}
break;
case Type_Binary:
{
wxMemoryBuffer buf;
if ( !QueryValue(name, buf) )
break;
rhs = FormatAsHex(buf.GetData(), buf.GetDataLen());
}
break;
// no idea how those appear in REGEDIT4 files
case Type_None:
case Type_Dword_big_endian:
case Type_Link:
case Type_Resource_list:
case Type_Full_resource_descriptor:
case Type_Resource_requirements_list:
default:
wxLogWarning(_("Can't export value of unsupported type %d."), type);
}
return rhs;
}
#if wxUSE_STREAMS
bool wxRegKey::DoExportValue(wxOutputStream& ostr, const wxString& name) const
{
// first examine the value type: if it's unsupported, simply skip it
// instead of aborting the entire export process because we failed to
// export a single value
wxString value = FormatValue(name);
if ( value.empty() )
{
wxLogWarning(_("Ignoring value \"%s\" of the key \"%s\"."),
name.c_str(), GetName().c_str());
return true;
}
// we do have the text representation of the value, now write everything
// out
// special case: unnamed/default value is represented as just "@"
if ( name.empty() )
{
if ( !WriteAsciiChar(ostr, '@') )
return false;
}
else // normal, named, value
{
if ( !WriteAsciiChar(ostr, '"') ||
!WriteAsciiString(ostr, name) ||
!WriteAsciiChar(ostr, '"') )
return false;
}
if ( !WriteAsciiChar(ostr, '=') )
return false;
return WriteAsciiString(ostr, value) && WriteAsciiEOL(ostr);
}
bool wxRegKey::DoExport(wxOutputStream& ostr) const
{
// write out this key name
if ( !WriteAsciiChar(ostr, '[') )
return false;
if ( !WriteAsciiString(ostr, GetName(false /* no short prefix */)) )
return false;
if ( !WriteAsciiChar(ostr, ']') || !WriteAsciiEOL(ostr) )
return false;
// dump all our values
long dummy;
wxString name;
wxRegKey& self = wx_const_cast(wxRegKey&, *this);
bool cont = self.GetFirstValue(name, dummy);
while ( cont )
{
if ( !DoExportValue(ostr, name) )
return false;
cont = GetNextValue(name, dummy);
}
// always terminate values by blank line, even if there were no values
if ( !WriteAsciiEOL(ostr) )
return false;
// recurse to subkeys
cont = self.GetFirstKey(name, dummy);
while ( cont )
{
wxRegKey subkey(*this, name);
if ( !subkey.DoExport(ostr) )
return false;
cont = GetNextKey(name, dummy);
}
return true;
}
#endif // wxUSE_STREAMS
// ============================================================================
// implementation of global private functions
// ============================================================================
bool KeyExists(WXHKEY hRootKey, const wxChar *szKey)
{
// don't close this key itself for the case of empty szKey!
if ( wxIsEmpty(szKey) )
return true;
HKEY hkeyDummy;
if ( ::RegOpenKeyEx
(
(HKEY)hRootKey,
szKey,
RESERVED,
KEY_READ, // we might not have enough rights for rw access
&hkeyDummy
) == ERROR_SUCCESS )
{
::RegCloseKey(hkeyDummy);
return true;
}
return false;
}
const wxChar *GetFullName(const wxRegKey *pKey, const wxChar *szValue)
{
static wxString s_str;
s_str = pKey->GetName();
if ( !wxIsEmpty(szValue) )
s_str << wxT("\\") << szValue;
return s_str.c_str();
}
inline void RemoveTrailingSeparator(wxString& str)
{
if ( !str.empty() && str.Last() == REG_SEPARATOR )
str.Truncate(str.Len() - 1);
}
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