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gecko-dev/xpcom/components/nsRegistry.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "nsIRegistry.h"
#include "nsIEnumerator.h"
#include "NSReg.h"
#include "prmem.h"
/*-------------------------------- nsRegistry ----------------------------------
| This class implements the nsIRegistry interface using the functions |
| provided by libreg (as declared in mozilla/modules/libreg/include/NSReg.h). |
| |
| Since that interface is designed to match the libreg function, this class |
| is implemented with each member function being a simple wrapper for the |
| corresponding libreg function. |
------------------------------------------------------------------------------*/
struct nsRegistry : public nsIRegistry {
// This class implements the nsISupports interface functions.
NS_DECL_ISUPPORTS
// This class implements the nsIRegistry interface functions.
NS_IMETHOD Open( const char *regFile = 0 );
NS_IMETHOD OpenDefault();
NS_IMETHOD Close();
NS_IMETHOD GetString( Key baseKey, const char *path, char **result );
NS_IMETHOD SetString( Key baseKey, const char *path, const char *value );
NS_IMETHOD GetInt( Key baseKey, const char *path, int32 *result );
NS_IMETHOD SetInt( Key baseKey, const char *path, int32 value );
NS_IMETHOD GetBytes( Key baseKey, const char *path, void **result, uint32 *len );
NS_IMETHOD SetBytes( Key baseKey, const char *path, void *value, uint32 len );
NS_IMETHOD GetIntArray( Key baseKey, const char *path, int32 **result, uint32 *len );
NS_IMETHOD SetIntArray( Key baseKey, const char *path, const int32 *value, uint32 len );
NS_IMETHOD AddSubtree( Key baseKey, const char *path, Key *result );
NS_IMETHOD RemoveSubtree( Key baseKey, const char *path );
NS_IMETHOD GetSubtree( Key baseKey, const char *path, Key *result );
NS_IMETHOD EnumerateSubtrees( Key baseKey, nsIEnumerator **result );
NS_IMETHOD EnumerateAllSubtrees( Key baseKey, nsIEnumerator **result );
NS_IMETHOD GetValueType( Key baseKey, const char *path, uint32 *result );
NS_IMETHOD GetValueLength( Key baseKey, const char *path, uint32 *result );
NS_IMETHOD EnumerateValues( Key baseKey, nsIEnumerator **result );
NS_IMETHOD GetCurrentUserName( char **result );
NS_IMETHOD SetCurrentUserName( const char *name );
NS_IMETHOD Pack();
// ctor/dtor
nsRegistry();
~nsRegistry();
protected:
HREG mReg; // Registry handle.
REGERR mErr; // Last libreg error code.
}; // nsRegistry
#include "nsIFactory.h"
/*----------------------------- nsRegistryFactory ------------------------------
| Class factory for nsRegistry objects. |
------------------------------------------------------------------------------*/
struct nsRegistryFactory : public nsIFactory {
// This class implements the nsISupports interface functions.
NS_DECL_ISUPPORTS
// nsIFactory methods
NS_IMETHOD CreateInstance(nsISupports *,const nsIID &,void **);
NS_IMETHOD LockFactory(PRBool aLock);
// ctor
nsRegistryFactory();
};
/*--------------------------- nsRegSubtreeEnumerator ---------------------------
| This class implements the nsIEnumerator interface and is used to implement |
| the nsRegistry EnumerateSubtrees and EnumerateAllSubtrees functions. |
------------------------------------------------------------------------------*/
struct nsRegSubtreeEnumerator : public nsIEnumerator {
// This class implements the nsISupports interface functions.
NS_DECL_ISUPPORTS
// This class implements the nsIEnumerator interface functions.
NS_IMETHOD First();
NS_IMETHOD Next();
NS_IMETHOD CurrentItem(nsISupports **aItem);
NS_IMETHOD IsDone();
// ctor/dtor
nsRegSubtreeEnumerator( HREG hReg, RKEY rKey, PRBool all );
protected:
NS_IMETHOD advance(); // Implementation file; does appropriate NR_RegEnum call.
HREG mReg; // Handle to registry we're affiliated with.
RKEY mKey; // Base key being enumerated.
REGENUM mEnum; // Corresponding libreg "enumerator".
REGENUM mNext; // Lookahead value.
uint32 mStyle; // Style (indicates all or some);
PRBool mDone; // Done flag.
REGERR mErr; // Last libreg error code.
}; // nsRegSubtreeEnumerator
/*--------------------------- nsRegValueEnumerator -----------------------------
| This class is a variation on nsRegSubtreeEnumerator that allocates |
| nsRegistryValue objects rather than nsRegistryNode objects. It also |
| overrides certain functions to make sure the "value" oriented libreg |
| functions used rather than the subtree oriented ones. |
------------------------------------------------------------------------------*/
struct nsRegValueEnumerator : public nsRegSubtreeEnumerator {
// Override CurrentItem to allocate nsRegistryValue objects.
NS_IMETHOD CurrentItem( nsISupports **result );
// Override advance() to use proper NR_RegEnumEntries.
NS_IMETHOD advance();
// ctor/dtor
nsRegValueEnumerator( HREG hReg, RKEY rKey );
}; // nsRegValueEnumerator
/*------------------------------ nsRegistryNode --------------------------------
| This class implements the nsIRegistryNode interface. Instances are |
| allocated by nsRegSubtreeEnumerator::CurrentItem. |
------------------------------------------------------------------------------*/
struct nsRegistryNode : public nsIRegistryNode {
// This class implements the nsISupports interface functions.
NS_DECL_ISUPPORTS
// This class implements the nsIRegistryNode interface functions.
NS_IMETHOD GetName( char **result );
// ctor
nsRegistryNode( HREG hReg, RKEY key, REGENUM slot );
protected:
HREG mReg; // Handle to registry this node is part of.
RKEY mKey; // Key this node is under.
REGENUM mEnum; // Copy of corresponding content of parent enumerator.
REGERR mErr; // Last libreg error code.
char mName[MAXREGPATHLEN]; // Buffer to hold name.
}; // nsRegistryNode
/*------------------------------ nsRegistryValue -------------------------------
| This class implements the nsIRegistryValue interface. Instances are |
| allocated by nsRegValueEnumerator::CurrentItem. |
------------------------------------------------------------------------------*/
struct nsRegistryValue : public nsIRegistryValue {
// This class implements the nsISupports interface functions.
NS_DECL_ISUPPORTS
// This class implements the nsIRegistryValue interface functions.
NS_IMETHOD GetName( char **result );
NS_IMETHOD GetValueType( uint32 *result );
NS_IMETHOD GetValueLength( uint32 *result );
// ctor
nsRegistryValue( HREG hReg, RKEY key, REGENUM slot );
protected:
nsresult getInfo(); // Get registry info.
HREG mReg; // Handle to registry this node is part of.
RKEY mKey; // Key this node is under.
REGENUM mEnum; // Copy of corresponding content of parent enumerator.
REGERR mErr; // Last libreg error code.
REGINFO mInfo; // Value info.
char mName[MAXREGNAMELEN]; // Buffer to hold name.
}; // nsRegistryValue
/*----------------------------- regerr2nsresult --------------------------------
| This utility function maps a REGERR value to a corresponding nsresult |
| error code. |
------------------------------------------------------------------------------*/
static nsresult regerr2nsresult( REGERR err ) {
nsresult rv = NS_ERROR_UNEXPECTED;
switch( err ) {
case REGERR_OK:
rv = NS_OK;
break;
case REGERR_FAIL:
rv = NS_ERROR_FAILURE;
break;
case REGERR_NOMORE:
rv = NS_ERROR_REG_NO_MORE;
break;
case REGERR_NOFIND:
rv = NS_ERROR_REG_NOT_FOUND;
break;
case REGERR_PARAM:
case REGERR_BADTYPE:
case REGERR_BADNAME:
rv = NS_ERROR_INVALID_ARG;
break;
case REGERR_NOFILE:
rv = NS_ERROR_REG_NOFILE;
break;
case REGERR_MEMORY:
rv = NS_ERROR_OUT_OF_MEMORY;
break;
case REGERR_BUFTOOSMALL:
rv = NS_ERROR_REG_BUFFER_TOO_SMALL;
break;
case REGERR_NAMETOOLONG:
rv = NS_ERROR_REG_NAME_TOO_LONG;
break;
case REGERR_NOPATH:
rv = NS_ERROR_REG_NO_PATH;
break;
case REGERR_READONLY:
rv = NS_ERROR_REG_READ_ONLY;
break;
case REGERR_BADUTF8:
rv = NS_ERROR_REG_BAD_UTF8;
break;
}
return rv;
}
/*----------------------------- reginfo2DataType -------------------------------
| This utility function converts the type field in the REGINFO structure to |
| the corresponding nsIRegistry::DataType value. |
------------------------------------------------------------------------------*/
static void reginfo2DataType( const REGINFO &in, uint32 &out ) {
// Transfer information, based on entry type.
switch( in.entryType ) {
case REGTYPE_ENTRY_STRING_UTF:
out = nsIRegistry::String;
//out.length = in.entryLength;
break;
case REGTYPE_ENTRY_INT32_ARRAY:
out = nsIRegistry::Int32;
// Convert length in bytes to array dimension.
//out.length = in.entryLength / sizeof(int32);
break;
case REGTYPE_ENTRY_BYTES:
out = nsIRegistry::Bytes;
//out.length = in.entryLength;
break;
case REGTYPE_ENTRY_FILE:
out = nsIRegistry::File;
//out.length = in.entryLength;
break;
}
}
/*----------------------------- reginfo2DataType -------------------------------
| This utility function converts the length field in the REGINFO structure to |
| the proper units (if type==Int32 array, we divide by sizeof(int32)). |
------------------------------------------------------------------------------*/
static void reginfo2Length( const REGINFO &in, uint32 &out ) {
// Transfer information, based on entry type.
switch( in.entryType ) {
case REGTYPE_ENTRY_STRING_UTF:
out = in.entryLength;
break;
case REGTYPE_ENTRY_INT32_ARRAY:
// Convert length in bytes to array dimension.
out = in.entryLength / sizeof(int32);
break;
case REGTYPE_ENTRY_BYTES:
out = in.entryLength;
break;
case REGTYPE_ENTRY_FILE:
out = in.entryLength;
break;
}
}
/*----------------------------------- IIDs -------------------------------------
| Static IID values for each imterface implemented here; required by the |
| NS_IMPL_ISUPPORTS macro. |
------------------------------------------------------------------------------*/
static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
static NS_DEFINE_IID(kIRegistryIID, NS_IREGISTRY_IID);
static NS_DEFINE_IID(kIRegistryNodeIID, NS_IREGISTRYNODE_IID);
static NS_DEFINE_IID(kIRegistryValueIID, NS_IREGISTRYVALUE_IID);
static NS_DEFINE_IID(kIEnumeratorIID, NS_IENUMERATOR_IID);
static NS_DEFINE_IID(kIFactoryIID, NS_IFACTORY_IID);
/*------------------------ nsISupports Implementation --------------------------
| This code generates the implementation of the nsISupports member functions |
| for each class implemented in this file. |
------------------------------------------------------------------------------*/
NS_IMPL_ISUPPORTS( nsRegistry, kIRegistryIID );
NS_IMPL_ISUPPORTS( nsRegSubtreeEnumerator, kIEnumeratorIID );
NS_IMPL_ISUPPORTS( nsRegistryNode, kIRegistryNodeIID );
NS_IMPL_ISUPPORTS( nsRegistryValue, kIRegistryValueIID );
/*-------------------------- nsRegistry::nsRegistry ----------------------------
| Vanilla nsRegistry constructor. The first time called, it does |
| NR_StartupRegistry. |
------------------------------------------------------------------------------*/
nsRegistry::nsRegistry()
: mReg( 0 ) {
NS_INIT_REFCNT();
// Ensure libreg is started.
static PRBool libregStarted = PR_FALSE;
if( !libregStarted ) {
NR_StartupRegistry();
libregStarted = PR_TRUE;
}
return;
}
/*------------------------- nsRegistry::~nsRegistry ----------------------------
| The dtor closes the registry file(if open). |
------------------------------------------------------------------------------*/
nsRegistry::~nsRegistry() {
if( mReg ) {
Close();
}
return;
}
/*----------------------------- nsRegistry::Open -------------------------------
| If the argument is null, delegate to OpenDefault, else open the registry |
| file. We first check to see if a registry file is already open and close |
| it if so. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::Open( const char *regFile ) {
// Check for default.
if( !regFile ) {
return OpenDefault();
}
// Ensure existing registry is closed.
Close();
// Open specified registry.
mErr = NR_RegOpen((char*)regFile, &mReg );
// Convert the result.
return regerr2nsresult( mErr );
}
/*-------------------------- nsRegistry::OpenDefault ---------------------------
| Open the "default" registry; in the case of this libreg-based implementation |
| that is done by passing a null file name pointer to NR_RegOpen. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::OpenDefault() {
// Ensure existing registry is closed.
Close();
// Open default registry.
mErr = NR_RegOpen( 0, &mReg );
// Convert the result.
return regerr2nsresult( mErr );
}
/*----------------------------- nsRegistry::Close ------------------------------
| Tests the mReg handle and if non-null, closes the registry via NR_RegClose. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::Close() {
mErr = REGERR_OK;
if( mReg ) {
mErr = NR_RegClose( mReg );
mReg = 0;
}
return regerr2nsresult( mErr );
}
/*--------------------------- nsRegistry::GetString ----------------------------
| First, look for the entry using GetValueInfo. If found, and it's a string, |
| allocate space for it and fetch the value. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::GetString( Key baseKey, const char *path, char **result ) {
nsresult rv = NS_OK;
// Make sure caller gave us place for result.
if( result ) {
*result = 0; // Clear result.
// Get info about the requested entry.
uint32 type, length;
rv = GetValueType( baseKey, path, &type );
if ( rv == NS_OK ) {
rv = GetValueLength( baseKey, path, &length );
}
// See if that worked.
if( rv == NS_OK ) {
// Make sure the entry is a string.
if( type == String ) {
// Allocate space for result.
*result =(char*)PR_Malloc( length + 1 );
if( *result ) {
// Get string from registry into result buffer.
mErr = NR_RegGetEntryString( mReg,(RKEY)baseKey,(char*)path, *result, length+1 );
// Convert status.
rv = regerr2nsresult( mErr );
// Test result.
if( rv != NS_OK ) {
// Didn't get result, free buffer.
PR_Free( *result );
*result = 0;
}
} else {
// Couldn't allocate buffer.
rv = NS_ERROR_OUT_OF_MEMORY;
}
} else {
// They asked for the wrong type of value.
rv = regerr2nsresult( REGERR_BADTYPE );
}
}
} else {
rv = NS_ERROR_NULL_POINTER;
}
return rv;
}
/*--------------------------- nsRegistry::SetString ----------------------------
| Simply sets the registry contents using NR_RegSetEntryString. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::SetString( Key baseKey, const char *path, const char *value ) {
nsresult rv = NS_OK;
// Set the contents.
mErr = NR_RegSetEntryString( mReg,(RKEY)baseKey,(char*)path,(char*)value );
// Convert result.
rv = regerr2nsresult( mErr );
return rv;
}
/*---------------------------- nsRegistry::GetInt ------------------------------
| This function is just shorthand for fetching a 1-element int32 array. We |
| implement it "manually" using NR_RegGetEntry(versus calling GetIntArray) |
| to save allocating a copy of the result. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::GetInt( Key baseKey, const char *path, int32 *result ) {
nsresult rv = NS_OK;
// Make sure caller gave us place for result.
if( result ) {
// Get info about the requested entry.
uint32 type;
rv = GetValueType( baseKey, path, &type );
// See if that worked.
if( rv == NS_OK ) {
// Make sure the entry is an int32 array.
if( type == Int32 ) {
uint32 len = sizeof *result;
// Get int from registry into result field.
mErr = NR_RegGetEntry( mReg,(RKEY)baseKey,(char*)path, result, &len );
// Convert status.
rv = regerr2nsresult( mErr );
} else {
// They asked for the wrong type of value.
rv = NS_ERROR_REG_BADTYPE;
}
}
} else {
rv = NS_ERROR_NULL_POINTER;
}
return rv;
}
/*---------------------------- nsRegistry::SetInt ------------------------------
| Write out the value as a one-element int32 array, using NR_RegSetEntry. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::SetInt( Key baseKey, const char *path, int32 value ) {
nsresult rv = NS_OK;
// Set the contents.
mErr = NR_RegSetEntry( mReg,
(RKEY)baseKey,
(char*)path,
REGTYPE_ENTRY_INT32_ARRAY,
&value,
sizeof value );
// Convert result.
rv = regerr2nsresult( mErr );
return rv;
}
/*--------------------------- nsRegistry::GetBytes -----------------------------
| Get the registry contents at specified location using NR_RegGetEntry. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::GetBytes( Key baseKey, const char *path, void **result, uint32 *len ) {
nsresult rv = NS_OK;
// Make sure caller gave us place for result.
if( result && len ) {
// Get info about the requested entry.
uint32 type;
rv = GetValueType( baseKey, path, &type );
// See if that worked.
if( rv == NS_OK ) {
// Make sure the entry is bytes.
if( type == Bytes ) {
// Get bytes from registry into result field.
mErr = NR_RegGetEntry( mReg,(RKEY)baseKey,(char*)path, result, len );
// Convert status.
rv = regerr2nsresult( mErr );
} else {
// They asked for the wrong type of value.
rv = NS_ERROR_REG_BADTYPE;
}
}
} else {
rv = NS_ERROR_NULL_POINTER;
}
return rv;
}
/*--------------------------- nsRegistry::SetBytes -----------------------------
| Set the contents at the specified registry location, using NR_RegSetEntry. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::SetBytes( Key baseKey, const char *path, void *value, uint32 len ) {
nsresult rv = NS_OK;
// Set contents.
mErr = NR_RegSetEntry( mReg,(RKEY)baseKey,(char*)path,
REGTYPE_ENTRY_BYTES, value, len );
// Convert result;
rv = regerr2nsresult( mErr );
return rv;
}
/*-------------------------- nsRegistry::GetIntArray ---------------------------
| Find out about the entry using GetValueInfo. We check the type and then |
| use NR_RegGetEntry to get the actual array. We have to convert from the |
| array dimension to number of bytes in the process. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::GetIntArray( Key baseKey, const char *path, int32 **result, uint32 *len ) {
nsresult rv = NS_OK;
// Make sure caller gave us place for result.
if( result && len ) {
// Get info about the requested entry.
uint32 type, length;
rv = GetValueType( baseKey, path, &type );
if ( rv == NS_OK ) {
rv = GetValueLength( baseKey, path, &length );
}
// See if that worked.
if( rv == NS_OK ) {
// Make sure the entry is bytes.
if( type == Int32 ) {
// Allocate space for result.
*len = length * sizeof(int32);
*result =(int32*)PR_Malloc( *len );
// Make sure that worked.
if( *result ) {
// Get array from registry into result field.
mErr = NR_RegGetEntry( mReg,(RKEY)baseKey,(char*)path, *result, len );
// Convert status.
if( mErr == REGERR_OK ) {
// Convert size in bytes to array dimension.
*len /= sizeof(int32);
} else {
rv = regerr2nsresult( mErr );
// Free buffer that we allocated(error will tell caller not to).
PR_Free( *result );
*result = 0;
}
} else {
rv = NS_ERROR_OUT_OF_MEMORY;
}
} else {
// They asked for the wrong type of value.
rv = NS_ERROR_REG_BADTYPE;
}
}
} else {
rv = NS_ERROR_NULL_POINTER;
}
return rv;
}
/*-------------------------- nsRegistry::SetIntArray ---------------------------
| Store the given integer array at the given point in the registry. The |
| length given is the size of the array, we have to convert that to the |
| size in bytes in order to use NR_RegSetEntry. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::SetIntArray( Key baseKey, const char *path, const int32 *value, uint32 len ) {
nsresult rv = NS_OK;
// Convert array dimension to byte count.
uint32 size = len * sizeof(int32);
// Set contents.
mErr = NR_RegSetEntry( mReg,(RKEY)baseKey,(char*)path,
REGTYPE_ENTRY_INT32_ARRAY,(void*)value, size );
// Convert result.
rv = regerr2nsresult( mErr );
return rv;
}
/*-------------------------- nsRegistry::AddSubtree ----------------------------
| Add a new registry subkey with the specified name, using NR_RegAddKey. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::AddSubtree( Key baseKey, const char *path, Key *result ) {
nsresult rv = NS_OK;
// Add the subkey.
mErr = NR_RegAddKey( mReg,(RKEY)baseKey,(char*)path,(RKEY*)result );
// Convert result.
rv = regerr2nsresult( mErr );
return rv;
}
/*------------------------- nsRegistry::RemoveSubtree --------------------------
| Deletes the subtree at a given location using NR_RegDeleteKey. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::RemoveSubtree( Key baseKey, const char *path ) {
nsresult rv = NS_OK;
// Delete the subkey.
mErr = NR_RegDeleteKey( mReg,(RKEY)baseKey,(char*)path );
// Convert result.
rv = regerr2nsresult( mErr );
return rv;
}
/*-------------------------- nsRegistry::GetSubtree ----------------------------
| Returns a nsIRegistry::Key(RKEY) for a given key/path. The key is |
| obtained using NR_RegGetKey. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::GetSubtree( Key baseKey, const char *path, Key *result ) {
nsresult rv = NS_OK;
// Make sure we have a place for the result.
if( result ) {
// Get key.
mErr = NR_RegGetKey( mReg,(RKEY)baseKey,(char*)path,(RKEY*)result );
// Convert result.
rv = regerr2nsresult( mErr );
} else {
rv = NS_ERROR_NULL_POINTER;
}
return rv;
}
/*----------------------- nsRegistry::EnumerateSubtrees ------------------------
| Allocate a nsRegSubtreeEnumerator object and return it to the caller. |
| We construct the enumerator using the registry handle from this registry |
| object, the user-specified registry key, and indicate that we don't want |
| to recurse down subtrees. No libreg functions are invoked at this point |
|(that will happen when the enumerator member functions are called). |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::EnumerateSubtrees( Key baseKey, nsIEnumerator **result ) {
nsresult rv = NS_OK;
// Make sure we have a place to put the result.
if( result ) {
*result = new nsRegSubtreeEnumerator( mReg,(RKEY)baseKey, PR_FALSE );
// Check for success.
if( *result ) {
// Bump refcnt on behalf of caller.
(*result)->AddRef();
} else {
// Unable to allocate space for the enumerator object.
rv = NS_ERROR_OUT_OF_MEMORY;
}
} else {
rv = NS_ERROR_NULL_POINTER;
}
return rv;
}
/*--------------------- nsRegistry::EnumerateAllSubtrees -----------------------
| Same as EnumerateSubtrees but we pass PR_TRUE to request that the |
| enumerator object descend subtrees when it is used. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::EnumerateAllSubtrees( Key baseKey, nsIEnumerator **result ) {
nsresult rv = NS_OK;
// Make sure we have a place to put the result.
if( result ) {
*result = new nsRegSubtreeEnumerator( mReg,(RKEY)baseKey, PR_TRUE );
// Check for success.
if( *result ) {
// Bump refcnt on behalf of caller.
(*result)->AddRef();
} else {
// Unable to allocate space for the enumerator object.
rv = NS_ERROR_OUT_OF_MEMORY;
}
} else {
rv = NS_ERROR_NULL_POINTER;
}
return rv;
}
/*------------------------- nsRegistry::GetValueType ---------------------------
| Gets the type from the registry using the NR_GetEntryInfo libreg API. |
| The result is transferred to the uint32 value passed in (with conversion |
| to the appropriate nsIRegistry::DataType value). |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::GetValueType( Key baseKey, const char *path, uint32 *result ) {
nsresult rv = NS_OK;
// Make sure we have a place to put the result.
if( result ) {
// Get registry info into local structure.
REGINFO info = { sizeof info, 0, 0 };
mErr = NR_RegGetEntryInfo( mReg,(RKEY)baseKey,(char*)path, &info );
if( mErr == REGERR_OK ) {
// Copy info to user's result value.
reginfo2DataType( info, *result );
} else {
rv = regerr2nsresult( mErr );
}
} else {
rv = NS_ERROR_NULL_POINTER;
}
return rv;
}
/*------------------------ nsRegistry::GetValueLength --------------------------
| Gets the registry value info via NR_RegGetEntryInfo. The length is |
| converted to the proper "units" via reginfo2Length. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::GetValueLength( Key baseKey, const char *path, uint32 *result ) {
nsresult rv = NS_OK;
// Make sure we have a place to put the result.
if( result ) {
// Get registry info into local structure.
REGINFO info = { sizeof info, 0, 0 };
mErr = NR_RegGetEntryInfo( mReg,(RKEY)baseKey,(char*)path, &info );
if( mErr == REGERR_OK ) {
// Copy info to user's result value.
reginfo2Length( info, *result );
} else {
rv = regerr2nsresult( mErr );
}
} else {
rv = NS_ERROR_NULL_POINTER;
}
return rv;
}
/*------------------------ nsRegistry::EnumerateValues -------------------------
| Allocates and returns an instance of nsRegValueEnumerator constructed in |
| a similar fashion as the nsRegSubtreeEnumerator is allocated/returned by |
| EnumerateSubtrees. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::EnumerateValues( Key baseKey, nsIEnumerator **result ) {
nsresult rv = NS_OK;
// Make sure we have a place to put the result.
if( result ) {
*result = new nsRegValueEnumerator( mReg,(RKEY)baseKey );
// Check for success.
if( *result ) {
// Bump refcnt on behalf of caller.
(*result)->AddRef();
} else {
// Unable to allocate space for the enumerator object.
rv = NS_ERROR_OUT_OF_MEMORY;
}
} else {
rv = NS_ERROR_NULL_POINTER;
}
return rv;
}
/*---------------------- nsRegistry::GetCurrentUserName ------------------------
| Simple wrapper for NR_RegGetUsername. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::GetCurrentUserName( char **result ) {
nsresult rv = NS_OK;
// Make sure we have a place to put the result.
if( result ) {
// Get the user name.
mErr = NR_RegGetUsername( result );
// Convert the result.
rv = regerr2nsresult( mErr );
} else {
rv = NS_ERROR_NULL_POINTER;
}
return rv;
}
/*---------------------- nsRegistry::SetCurrentUserName ------------------------
| Simple wrapper for NR_RegSetUsername. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::SetCurrentUserName( const char *name ) {
nsresult rv = NS_OK;
// Set the user name.
mErr = NR_RegSetUsername( name );
// Convert result.
rv = regerr2nsresult( mErr );
return rv;
}
/*----------------------------- nsRegistry::Pack -------------------------------
| Simple wrapper for NR_RegPack. We don't set up any callback. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistry::Pack() {
nsresult rv = NS_OK;
// Pack the registry.
mErr = NR_RegPack( mReg, 0, 0 );
// Convert result.
rv = regerr2nsresult( mErr );
return rv;
}
/*-------------- nsRegSubtreeEnumerator::nsRegSubtreeEnumerator ----------------
| The ctor simply stashes all the information that will be needed to enumerate |
| the subkeys. |
------------------------------------------------------------------------------*/
nsRegSubtreeEnumerator::nsRegSubtreeEnumerator( HREG hReg, RKEY rKey, PRBool all )
: mReg( hReg ), mKey( rKey ), mEnum( 0 ), mNext( 0 ),
mStyle( all ? REGENUM_DESCEND : 0 ), mDone( PR_FALSE ), mErr( -1 ) {
NS_INIT_REFCNT();
return;
}
/*----------------------- nsRegSubtreeEnumerator::First ------------------------
| Set mEnum to 0; this will cause the next NR_RegEnum call to go to |
| the beginning. We then do a Next() call in order to do a "lookahead" to |
| properly detect an empty list (i.e., set the mDone flag). |
------------------------------------------------------------------------------*/
NS_IMETHODIMP
nsRegSubtreeEnumerator::First() {
nsresult rv = NS_OK;
// Reset "done" flag.
mDone = PR_FALSE;
// Go to beginning.
mEnum = mNext = 0;
// Lookahead so mDone flag gets set for empty list.
rv = Next();
return rv;
}
/*----------------------- nsRegSubtreeEnumerator::Next -------------------------
| First, we check if we've already advanced to the end by checking the mDone |
| flag. |
| |
| We advance mEnum to the next enumeration value which is in the mNext |
| lookahead buffer. We must then call advance to lookahead and properly set |
| the isDone flag. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP
nsRegSubtreeEnumerator::Next() {
nsresult rv = NS_OK;
// Check for at end.
if ( !mDone ) {
// Advance to next spot.
mEnum = mNext;
// Lookahead so mDone is properly set (and to update mNext).
rv = advance();
} else {
// Set result accordingly.
rv = regerr2nsresult( REGERR_NOMORE );
}
return rv;
}
/*---------------------- nsRegSubtreeEnumerator::advance -----------------------
| Advance mNext to next subkey using NR_RegEnumSubkeys. We set mDone if |
| there are no more subkeys. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegSubtreeEnumerator::advance() {
char name[MAXREGPATHLEN];
uint32 len = sizeof name;
mErr = NR_RegEnumSubkeys( mReg, mKey, &mNext, name, len, mStyle );
// See if we ran off end.
if( mErr == REGERR_NOMORE ) {
// Remember we've run off end.
mDone = PR_TRUE;
}
// Convert result.
nsresult rv = regerr2nsresult( mErr );
return rv;
};
/*-------------------- nsRegSubtreeEnumerator::CurrentItem ---------------------
| Allocates and returns a new instance of class nsRegistryNode. The node |
| object will hold the curent mEnum value so it can obtain its name from |
| the registry when asked. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP
nsRegSubtreeEnumerator::CurrentItem( nsISupports **result) {
nsresult rv = NS_OK;
// Make sure there is a place to put the result.
if( result ) {
*result = new nsRegistryNode( mReg, mKey, mEnum );
if( *result ) {
(*result)->AddRef();
} else {
rv = NS_ERROR_OUT_OF_MEMORY;
}
} else {
rv = NS_ERROR_NULL_POINTER;
}
return rv;
}
/*---------------------- nsRegSubtreeEnumerator::IsDone ------------------------
| Simply return mDone. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP
nsRegSubtreeEnumerator::IsDone() {
nsresult rv = mDone;
return rv;
}
/*---------------- nsRegValueEnumerator::nsRegValueEnumerator ------------------
| Delegates everything to the base class constructor. |
------------------------------------------------------------------------------*/
nsRegValueEnumerator::nsRegValueEnumerator( HREG hReg, RKEY rKey )
: nsRegSubtreeEnumerator( hReg, rKey, PR_FALSE ) {
return;
}
/*--------------------- nsRegValueEnumerator::CurrentItem ----------------------
| As the nsRegSubtreeEnumerator counterpart, but allocates an object of |
| class nsRegistryValue. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP
nsRegValueEnumerator::CurrentItem( nsISupports **result ) {
nsresult rv = NS_OK;
// Make sure there is a place to put the result.
if( result ) {
*result = new nsRegistryValue( mReg, mKey, mEnum );
if( *result ) {
(*result)->AddRef();
} else {
rv = NS_ERROR_OUT_OF_MEMORY;
}
} else {
rv = NS_ERROR_NULL_POINTER;
}
return rv;
}
/*----------------------- nsRegValueEnumerator::advance ------------------------
| Advance mNext to next subkey using NR_RegEnumEntries. We set mDone if |
| there are no more entries. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegValueEnumerator::advance() {
char name[MAXREGNAMELEN];
uint32 len = sizeof name;
REGINFO info = { sizeof info, 0, 0 };
mErr = NR_RegEnumEntries( mReg, mKey, &mNext, name, len, &info );
// See if we ran off end.
if( mErr == REGERR_NOMORE ) {
// Remember we've run off end.
mDone = PR_TRUE;
}
// Convert result.
nsresult rv = regerr2nsresult( mErr );
return rv;
};
/*---------------------- nsRegistryNode::nsRegistryNode ------------------------
| Store the arguments in the corresponding data members and initialize |
| the other data members. We defer the libreg calls till we're asked for |
| our name. We use mErr==-1 to indicate we haven't fetched the name yet. |
------------------------------------------------------------------------------*/
nsRegistryNode::nsRegistryNode( HREG hReg, RKEY key, REGENUM slot )
: mReg( hReg ), mKey( key ), mEnum( slot ), mErr( -1 ) {
NS_INIT_REFCNT();
return;
}
/*-------------------------------- PR_strdup -----------------------------------
| Utility function that does PR_Malloc and copies argument string. Caller |
| must do PR_Free. |
------------------------------------------------------------------------------*/
static char *PR_strdup( const char *in ) {
char *result = (char*)PR_Malloc( strlen( in ) + 1 );
if ( result ) {
strcpy( result, in );
}
return result;
}
/*-------------------------- nsRegistryNode::GetName ---------------------------
| If we haven't fetched it yet, get the name of the corresponding subkey now, |
| using NR_RegEnumSubkeys. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistryNode::GetName( char **result ) {
nsresult rv = NS_OK;
// Make sure there is a place to put the result.
if( result ) {
// Test whether we haven't tried to get it yet.
if( mErr == -1 ) {
REGENUM temp = mEnum;
// Get name.
mErr = NR_RegEnumSubkeys( mReg, mKey, &temp, mName, sizeof mName, PR_FALSE );
}
// Convert result from prior libreg call.
rv = regerr2nsresult( mErr );
if( rv == NS_OK || rv == NS_ERROR_REG_NO_MORE ) {
// worked, return actual result.
*result = PR_strdup( mName );
if ( *result ) {
rv = NS_OK;
} else {
rv = NS_ERROR_OUT_OF_MEMORY;
}
}
} else {
rv = NS_ERROR_NULL_POINTER;
}
return rv;
}
/*--------------------- nsRegistryValue::nsRegistryValue -----------------------
| Implemented the same way as the nsRegistryNode ctor. |
------------------------------------------------------------------------------*/
nsRegistryValue::nsRegistryValue( HREG hReg, RKEY key, REGENUM slot )
: mReg( hReg ), mKey( key ), mEnum( slot ), mErr( -1 ) {
NS_INIT_REFCNT();
return;
}
/*------------------------- nsRegistryValue::GetName ---------------------------
| See nsRegistryNode::GetName; we use NR_RegEnumEntries in this case. |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistryValue::GetName( char **result ) {
nsresult rv = NS_OK;
// Make sure we have a place to put the result.
if( result ) {
// Ensure we've got the info we need.
rv = getInfo();
if( rv == NS_OK || rv == NS_ERROR_REG_NO_MORE ) {
// worked, return actual result.
*result = PR_strdup( mName );
if ( *result ) {
rv = NS_OK;
} else {
rv = NS_ERROR_OUT_OF_MEMORY;
}
}
} else {
rv = NS_ERROR_NULL_POINTER;
}
return rv;
}
/*----------------------- nsRegistryValue::GetValueType ------------------------
| We test if we've got the info already. If not, we git it by calling |
| getInfo. We calculate the result by converting the REGINFO type field to |
| a nsIRegistry::DataType value (using reginfo2DataType). |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistryValue::GetValueType( uint32 *result ) {
nsresult rv = NS_OK;
// Make sure we have room for th result.
if( result ) {
// Make sure we've got the info we need.
rv = getInfo();
// Check if it worked.
if( rv == NS_OK ) {
// Convert result from REGINFO to nsIRegistry::ValueInfo.
reginfo2DataType( mInfo, *result );
}
} else {
rv = NS_ERROR_NULL_POINTER;
}
return rv;
}
/*---------------------- nsRegistryValue::GetValueLength -----------------------
| We test if we've got the info already. If not, we git it by calling |
| getInfo. We calculate the result by converting the REGINFO type field to |
| a nsIRegistry::DataType value (using reginfo2Length). |
------------------------------------------------------------------------------*/
NS_IMETHODIMP nsRegistryValue::GetValueLength( uint32 *result ) {
nsresult rv = NS_OK;
// Make sure we have room for th result.
if( result ) {
// Make sure we've got the info we need.
rv = getInfo();
// Check if it worked.
if( rv == NS_OK ) {
// Convert result from REGINFO to length.
reginfo2Length( mInfo, *result );
}
} else {
rv = NS_ERROR_NULL_POINTER;
}
return rv;
}
/*------------------------- nsRegistryValue::getInfo ---------------------------
| Call NR_RegEnumEntries to set the mInfo/mName data members. |
------------------------------------------------------------------------------*/
nsresult nsRegistryValue::getInfo() {
nsresult rv = NS_OK;
// Test whether we haven't tried to get it yet.
if( mErr == -1 ) {
REGENUM temp = mEnum;
// Get name and info.
mErr = NR_RegEnumEntries( mReg, mKey, &temp, mName, sizeof mName, &mInfo );
// Convert result.
rv = regerr2nsresult( mErr );
}
return rv;
}
nsRegistryFactory::nsRegistryFactory() {
NS_INIT_REFCNT();
}
NS_IMPL_ISUPPORTS(nsRegistryFactory, kIFactoryIID);
NS_IMETHODIMP
nsRegistryFactory::CreateInstance(nsISupports *aOuter,
const nsIID &aIID,
void **aResult) {
nsresult rv = NS_OK;
nsRegistry* newRegistry;
if(aResult == NULL) {
return NS_ERROR_NULL_POINTER;
} else {
*aResult = NULL;
}
if(0 != aOuter) {
return NS_ERROR_NO_AGGREGATION;
}
NS_NEWXPCOM(newRegistry, nsRegistry);
if(newRegistry == NULL) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(newRegistry);
rv = newRegistry->QueryInterface(aIID, aResult);
NS_RELEASE(newRegistry);
return rv;
}
nsresult
nsRegistryFactory::LockFactory(PRBool aLock)
{
// Not implemented in simplest case.
return NS_OK;
}
// This is a temporary hack; needs work to support dynamic binding
// via nsComponentManager and support for multiple factories per DLL.
extern "C" NS_EXPORT nsresult
nsRegistry_GetFactory(const nsCID &cid, nsISupports* servMgr, nsIFactory** aFactory ) {
nsresult rv = NS_OK;
if( aFactory == 0 ) {
return NS_ERROR_NULL_POINTER;
} else {
*aFactory = 0;
}
nsIFactory* inst = new nsRegistryFactory();
if(0 == inst) {
rv = NS_ERROR_OUT_OF_MEMORY;
} else {
NS_ADDREF(inst);
*aFactory = inst;
}
return rv;
}
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