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wine/dlls/kernel32/atom.c

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/*
* Atom table functions
*
* Copyright 1993, 1994, 1995 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "winternl.h"
#include "wine/exception.h"
#include "wine/unicode.h"
#include "kernel_private.h"
#define MAX_ATOM_LEN 255
#define IS_INTATOM(x) (((ULONG_PTR)(x) >> 16) == 0)
/******************************************************************
* get_local_table
*
* Returns the local atom table for this process (and create it if doesn't
* exist yet)
*/
static RTL_ATOM_TABLE get_local_table(DWORD entries)
{
static RTL_ATOM_TABLE local_table;
if (!local_table)
{
NTSTATUS status;
RTL_ATOM_TABLE table = NULL;
if ((status = RtlCreateAtomTable( entries, &table )))
SetLastError( RtlNtStatusToDosError( status ) );
else if (InterlockedCompareExchangePointer((void*)&local_table, table, NULL) != NULL)
RtlDestroyAtomTable( table );
}
return local_table;
}
/***********************************************************************
* InitAtomTable (KERNEL32.@)
*
* Initialise the global atom table.
*
* PARAMS
* entries [I] The number of entries to reserve in the table.
*
* RETURNS
* Success: TRUE.
* Failure: FALSE.
*/
BOOL WINAPI InitAtomTable( DWORD entries )
{
return get_local_table( entries ) ? TRUE : FALSE;
}
/******************************************************************
* check_integral_atom
*
* Check if a string (ANSI or UNICODE) is in fact an integral atom
* (but doesn't check the "#1234" form)
*/
static inline BOOL check_integral_atom( const void* ptr, ATOM* patom)
{
if (!IS_INTATOM( ptr )) return FALSE;
if ((*patom = LOWORD( ptr )) >= MAXINTATOM)
{
SetLastError( ERROR_INVALID_PARAMETER );
*patom = 0;
}
return TRUE;
}
/***********************************************************************
* GlobalAddAtomA (KERNEL32.@)
*
* Add a character string to the global atom table and return a unique
* value identifying it.
*
* RETURNS
* Success: The atom allocated to str.
* Failure: 0.
*/
ATOM WINAPI GlobalAddAtomA( LPCSTR str /* [in] String to add */ )
{
ATOM atom = 0;
__TRY
{
if (!check_integral_atom( str, &atom ))
{
WCHAR buffer[MAX_ATOM_LEN];
DWORD len = MultiByteToWideChar( CP_ACP, 0, str, strlen(str), buffer, MAX_ATOM_LEN );
if (!len) SetLastError( ERROR_INVALID_PARAMETER );
else
{
NTSTATUS status = NtAddAtom( buffer, len * sizeof(WCHAR), &atom );
if (status)
{
SetLastError( RtlNtStatusToDosError( status ) );
atom = 0;
}
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError( ERROR_INVALID_PARAMETER );
atom = 0;
}
__ENDTRY
return atom;
}
/***********************************************************************
* AddAtomA (KERNEL32.@)
*
* Add a character string to the global atom table and return a unique
* value identifying it.
*
* RETURNS
* Success: The atom allocated to str.
* Failure: 0.
*/
ATOM WINAPI AddAtomA( LPCSTR str /* [in] String to add */ )
{
ATOM atom = 0;
if (!check_integral_atom( str, &atom ))
{
WCHAR buffer[MAX_ATOM_LEN + 1];
DWORD len;
RTL_ATOM_TABLE table;
len = MultiByteToWideChar( CP_ACP, 0, str, -1, buffer, MAX_ATOM_LEN + 1 );
if (!len) SetLastError( ERROR_INVALID_PARAMETER );
else if ((table = get_local_table( 0 )))
{
NTSTATUS status = RtlAddAtomToAtomTable( table, buffer, &atom );
if (status)
{
SetLastError( RtlNtStatusToDosError( status ) );
atom = 0;
}
}
}
return atom;
}
/***********************************************************************
* GlobalAddAtomW (KERNEL32.@)
*
* Unicode version of GlobalAddAtomA.
*/
ATOM WINAPI GlobalAddAtomW( LPCWSTR str )
{
ATOM atom = 0;
NTSTATUS status;
if (!check_integral_atom( str, &atom ) &&
(status = NtAddAtom( str, strlenW( str ) * sizeof(WCHAR), &atom )))
{
SetLastError( RtlNtStatusToDosError( status ) );
atom = 0;
}
return atom;
}
/***********************************************************************
* AddAtomW (KERNEL32.@)
*
* Unicode version of AddAtomA.
*/
ATOM WINAPI AddAtomW( LPCWSTR str )
{
ATOM atom = 0;
RTL_ATOM_TABLE table;
if (!check_integral_atom( str, &atom ) && (table = get_local_table( 0 )))
{
NTSTATUS status = RtlAddAtomToAtomTable( table, str, &atom );
if (status)
{
SetLastError( RtlNtStatusToDosError( status ) );
atom = 0;
}
}
return atom;
}
/***********************************************************************
* GlobalDeleteAtom (KERNEL32.@)
*
* Decrement the reference count of a string atom. If the count is
* zero, the string associated with the atom is removed from the table.
*
* RETURNS
* Success: 0.
* Failure: atom.
*/
ATOM WINAPI GlobalDeleteAtom( ATOM atom /* [in] Atom to delete */ )
{
if (atom >= MAXINTATOM)
{
NTSTATUS status = NtDeleteAtom( atom );
if (status)
{
SetLastError( RtlNtStatusToDosError( status ) );
return atom;
}
}
return 0;
}
/***********************************************************************
* DeleteAtom (KERNEL32.@)
*
* Decrement the reference count of a string atom. If the count becomes
* zero, the string associated with the atom is removed from the table.
*
* RETURNS
* Success: 0.
* Failure: atom
*/
ATOM WINAPI DeleteAtom( ATOM atom /* [in] Atom to delete */ )
{
NTSTATUS status;
RTL_ATOM_TABLE table;
if (atom >= MAXINTATOM)
{
if (!(table = get_local_table( 0 ))) return atom;
status = RtlDeleteAtomFromAtomTable( table, atom );
if (status)
{
SetLastError( RtlNtStatusToDosError( status ) );
return atom;
}
}
return 0;
}
/***********************************************************************
* GlobalFindAtomA (KERNEL32.@)
*
* Get the atom associated with a string.
*
* RETURNS
* Success: The associated atom.
* Failure: 0.
*/
ATOM WINAPI GlobalFindAtomA( LPCSTR str /* [in] Pointer to string to search for */ )
{
ATOM atom = 0;
if (!check_integral_atom( str, &atom ))
{
WCHAR buffer[MAX_ATOM_LEN];
DWORD len = MultiByteToWideChar( CP_ACP, 0, str, strlen(str), buffer, MAX_ATOM_LEN );
if (!len) SetLastError( ERROR_INVALID_PARAMETER );
else
{
NTSTATUS status = NtFindAtom( buffer, len * sizeof(WCHAR), &atom );
if (status)
{
SetLastError( RtlNtStatusToDosError( status ) );
atom = 0;
}
}
}
return atom;
}
/***********************************************************************
* FindAtomA (KERNEL32.@)
*
* Get the atom associated with a string.
*
* RETURNS
* Success: The associated atom.
* Failure: 0.
*/
ATOM WINAPI FindAtomA( LPCSTR str /* [in] Pointer to string to find */ )
{
ATOM atom = 0;
if (!check_integral_atom( str, &atom ))
{
WCHAR buffer[MAX_ATOM_LEN + 1];
DWORD len;
RTL_ATOM_TABLE table;
len = MultiByteToWideChar( CP_ACP, 0, str, -1, buffer, MAX_ATOM_LEN + 1 );
if (!len) SetLastError( ERROR_INVALID_PARAMETER );
else if ((table = get_local_table( 0 )))
{
NTSTATUS status = RtlLookupAtomInAtomTable( table, buffer, &atom );
if (status)
{
SetLastError( RtlNtStatusToDosError( status ) );
atom = 0;
}
}
}
return atom;
}
/***********************************************************************
* GlobalFindAtomW (KERNEL32.@)
*
* Unicode version of GlobalFindAtomA.
*/
ATOM WINAPI GlobalFindAtomW( LPCWSTR str )
{
ATOM atom = 0;
if (!check_integral_atom( str, &atom ))
{
NTSTATUS status = NtFindAtom( str, strlenW( str ) * sizeof(WCHAR), &atom );
if (status)
{
SetLastError( RtlNtStatusToDosError( status ) );
atom = 0;
}
}
return atom;
}
/***********************************************************************
* FindAtomW (KERNEL32.@)
*
* Unicode version of FindAtomA.
*/
ATOM WINAPI FindAtomW( LPCWSTR str )
{
ATOM atom = 0;
NTSTATUS status;
RTL_ATOM_TABLE table;
if ((table = get_local_table( 0 )))
{
status = RtlLookupAtomInAtomTable( table, str, &atom );
if (status)
{
SetLastError( RtlNtStatusToDosError( status ) );
atom = 0;
}
}
return atom;
}
/***********************************************************************
* GlobalGetAtomNameA (KERNEL32.@)
*
* Get a copy of the string associated with an atom.
*
* RETURNS
* Success: The length of the returned string in characters.
* Failure: 0.
*/
UINT WINAPI GlobalGetAtomNameA(
ATOM atom, /* [in] Atom identifier */
LPSTR buffer, /* [out] Pointer to buffer for atom string */
INT count ) /* [in] Size of buffer */
{
WCHAR tmpW[MAX_ATOM_LEN + 1];
UINT wlen, len = 0, c;
if (count <= 0) SetLastError( ERROR_MORE_DATA );
else if ((wlen = GlobalGetAtomNameW( atom, tmpW, MAX_ATOM_LEN + 1 )))
{
char tmp[MAX_ATOM_LEN + 1];
len = WideCharToMultiByte( CP_ACP, 0, tmpW, wlen, tmp, MAX_ATOM_LEN + 1, NULL, NULL );
c = min(len, count - 1);
memcpy(buffer, tmp, c);
buffer[c] = '\0';
if (len >= count)
{
len = 0;
SetLastError( ERROR_MORE_DATA );
}
}
return len;
}
/***********************************************************************
* GetAtomNameA (KERNEL32.@)
*
* Get a copy of the string associated with an atom.
*
* RETURNS
* Success: The length of the returned string in characters.
* Failure: 0.
*/
UINT WINAPI GetAtomNameA(
ATOM atom, /* [in] Atom */
LPSTR buffer, /* [out] Pointer to string for atom string */
INT count) /* [in] Size of buffer */
{
WCHAR tmpW[MAX_ATOM_LEN + 1];
UINT wlen, len = 0, c;
if (count <= 0) SetLastError( ERROR_MORE_DATA );
else if ((wlen = GetAtomNameW( atom, tmpW, MAX_ATOM_LEN + 1 )))
{
char tmp[MAX_ATOM_LEN + 1];
len = WideCharToMultiByte( CP_ACP, 0, tmpW, wlen, tmp, MAX_ATOM_LEN + 1, NULL, NULL );
c = min(len, count - 1);
memcpy(buffer, tmp, c);
buffer[c] = '\0';
if (len >= count)
{
len = c;
SetLastError( ERROR_MORE_DATA );
}
}
return len;
}
/***********************************************************************
* GlobalGetAtomNameW (KERNEL32.@)
*
* Unicode version of GlobalGetAtomNameA.
*/
UINT WINAPI GlobalGetAtomNameW( ATOM atom, LPWSTR buffer, INT count )
{
char ptr[sizeof(ATOM_BASIC_INFORMATION) + MAX_ATOM_LEN * sizeof(WCHAR)];
ATOM_BASIC_INFORMATION* abi = (ATOM_BASIC_INFORMATION*)ptr;
ULONG ptr_size = sizeof(ATOM_BASIC_INFORMATION) + MAX_ATOM_LEN * sizeof(WCHAR);
NTSTATUS status;
UINT length = 0;
if (count <= 0)
{
SetLastError( ERROR_MORE_DATA );
return 0;
}
status = NtQueryInformationAtom( atom, AtomBasicInformation, (void*)ptr, ptr_size, NULL );
if (status) SetLastError( RtlNtStatusToDosError( status ) );
else
{
length = min( abi->NameLength / sizeof(WCHAR), count);
memcpy( buffer, abi->Name, length * sizeof(WCHAR) );
/* yes, the string will not be null terminated if the passed buffer
* is one WCHAR too small (and it's not an error)
*/
if (length < abi->NameLength / sizeof(WCHAR))
{
SetLastError( ERROR_MORE_DATA );
length = count;
}
else if (length < count) buffer[length] = '\0';
}
return length;
}
/***********************************************************************
* GetAtomNameW (KERNEL32.@)
*
* Unicode version of GetAtomNameA.
*/
UINT WINAPI GetAtomNameW( ATOM atom, LPWSTR buffer, INT count )
{
NTSTATUS status;
RTL_ATOM_TABLE table;
DWORD length;
WCHAR tmp[MAX_ATOM_LEN + 1];
if (count <= 0)
{
SetLastError( ERROR_MORE_DATA );
return 0;
}
if (!(table = get_local_table( 0 ))) return 0;
length = sizeof(tmp);
status = RtlQueryAtomInAtomTable( table, atom, NULL, NULL, tmp, &length );
if (status)
{
SetLastError( RtlNtStatusToDosError( status ) );
return 0;
}
length = min(length, (count - 1) * sizeof(WCHAR));
if (length) memcpy(buffer, tmp, length);
else SetLastError( ERROR_INSUFFICIENT_BUFFER );
length /= sizeof(WCHAR);
buffer[length] = '\0';
return length;
}
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