wine/memory/string.c
2002-12-12 23:34:01 +00:00

310 lines
7.2 KiB
C

/*
* String functions
*
* Copyright 1993 Yngvi Sigurjonsson
* Copyright 1996 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <ctype.h>
#include <string.h>
#include "windef.h"
#include "winbase.h"
#include "wine/winbase16.h"
#include "wine/exception.h"
#include "wine/unicode.h"
#include "winerror.h"
#include "winnls.h"
#include "excpt.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(string);
/* filter for page-fault exceptions */
static WINE_EXCEPTION_FILTER(page_fault)
{
if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
return EXCEPTION_EXECUTE_HANDLER;
return EXCEPTION_CONTINUE_SEARCH;
}
/***********************************************************************
* hmemcpy (KERNEL.348)
*/
void WINAPI hmemcpy16( LPVOID dst, LPCVOID src, LONG count )
{
memcpy( dst, src, count );
}
/***********************************************************************
* lstrcat (KERNEL.89)
*/
SEGPTR WINAPI lstrcat16( SEGPTR dst, LPCSTR src )
{
/* Windows does not check for NULL pointers here, so we don't either */
strcat( MapSL(dst), src );
return dst;
}
/***********************************************************************
* lstrcat (KERNEL32.@)
* lstrcatA (KERNEL32.@)
*/
LPSTR WINAPI lstrcatA( LPSTR dst, LPCSTR src )
{
__TRY
{
strcat( dst, src );
}
__EXCEPT(page_fault)
{
SetLastError( ERROR_INVALID_PARAMETER );
return NULL;
}
__ENDTRY
return dst;
}
/***********************************************************************
* lstrcatW (KERNEL32.@)
*/
LPWSTR WINAPI lstrcatW( LPWSTR dst, LPCWSTR src )
{
__TRY
{
strcatW( dst, src );
}
__EXCEPT(page_fault)
{
SetLastError( ERROR_INVALID_PARAMETER );
return NULL;
}
__ENDTRY
return dst;
}
/***********************************************************************
* lstrcatn (KERNEL.352)
*/
SEGPTR WINAPI lstrcatn16( SEGPTR dst, LPCSTR src, INT16 n )
{
LPSTR p = MapSL(dst);
LPSTR start = p;
while (*p) p++;
if ((n -= (p - start)) <= 0) return dst;
lstrcpynA( p, src, n );
return dst;
}
/***********************************************************************
* lstrcpy (KERNEL.88)
*/
SEGPTR WINAPI lstrcpy16( SEGPTR dst, LPCSTR src )
{
if (!lstrcpyA( MapSL(dst), src )) dst = 0;
return dst;
}
/***********************************************************************
* lstrcpy (KERNEL32.@)
* lstrcpyA (KERNEL32.@)
*/
LPSTR WINAPI lstrcpyA( LPSTR dst, LPCSTR src )
{
__TRY
{
/* this is how Windows does it */
memmove( dst, src, strlen(src)+1 );
}
__EXCEPT(page_fault)
{
ERR("(%p, %p): page fault occurred ! Caused by bug ?\n", dst, src);
SetLastError( ERROR_INVALID_PARAMETER );
return NULL;
}
__ENDTRY
return dst;
}
/***********************************************************************
* lstrcpyW (KERNEL32.@)
*/
LPWSTR WINAPI lstrcpyW( LPWSTR dst, LPCWSTR src )
{
__TRY
{
strcpyW( dst, src );
}
__EXCEPT(page_fault)
{
SetLastError( ERROR_INVALID_PARAMETER );
return NULL;
}
__ENDTRY
return dst;
}
/***********************************************************************
* lstrcpyn (KERNEL.353)
*/
SEGPTR WINAPI lstrcpyn16( SEGPTR dst, LPCSTR src, INT16 n )
{
lstrcpynA( MapSL(dst), src, n );
return dst;
}
/***********************************************************************
* lstrcpyn (KERNEL32.@)
* lstrcpynA (KERNEL32.@)
*
* Note: this function differs from the UNIX strncpy, it _always_ writes
* a terminating \0.
*
* Note: n is an INT but Windows treats it as unsigned, and will happily
* copy a gazillion chars if n is negative.
*/
LPSTR WINAPI lstrcpynA( LPSTR dst, LPCSTR src, INT n )
{
LPSTR p = dst;
UINT count = n;
TRACE("(%p, %s, %i)\n", dst, debugstr_a(src), n);
/* In real windows the whole function is protected by an exception handler
* that returns ERROR_INVALID_PARAMETER on faulty parameters
* We currently just check for NULL.
*/
if (!dst || !src) {
SetLastError(ERROR_INVALID_PARAMETER);
return 0;
}
while ((count > 1) && *src)
{
count--;
*p++ = *src++;
}
if (count) *p = 0;
return dst;
}
/***********************************************************************
* lstrcpynW (KERNEL32.@)
*
* Note: this function differs from the UNIX strncpy, it _always_ writes
* a terminating \0
*
* Note: n is an INT but Windows treats it as unsigned, and will happily
* copy a gazillion chars if n is negative.
*/
LPWSTR WINAPI lstrcpynW( LPWSTR dst, LPCWSTR src, INT n )
{
LPWSTR p = dst;
UINT count = n;
TRACE("(%p, %s, %i)\n", dst, debugstr_w(src), n);
/* In real windows the whole function is protected by an exception handler
* that returns ERROR_INVALID_PARAMETER on faulty parameters
* We currently just check for NULL.
*/
if (!dst || !src) {
SetLastError(ERROR_INVALID_PARAMETER);
return 0;
}
while ((count > 1) && *src)
{
count--;
*p++ = *src++;
}
if (count) *p = 0;
return dst;
}
/***********************************************************************
* lstrlen (KERNEL.90)
*/
INT16 WINAPI lstrlen16( LPCSTR str )
{
return (INT16)lstrlenA( str );
}
/***********************************************************************
* lstrlen (KERNEL32.@)
* lstrlenA (KERNEL32.@)
*/
INT WINAPI lstrlenA( LPCSTR str )
{
INT ret;
__TRY
{
ret = strlen(str);
}
__EXCEPT(page_fault)
{
SetLastError( ERROR_INVALID_PARAMETER );
return 0;
}
__ENDTRY
return ret;
}
/***********************************************************************
* lstrlenW (KERNEL32.@)
*/
INT WINAPI lstrlenW( LPCWSTR str )
{
INT ret;
__TRY
{
ret = strlenW(str);
}
__EXCEPT(page_fault)
{
SetLastError( ERROR_INVALID_PARAMETER );
return 0;
}
__ENDTRY
return ret;
}
/***********************************************************************
* UnicodeToAnsi (KERNEL.434)
*/
INT16 WINAPI UnicodeToAnsi16( LPCWSTR src, LPSTR dst, INT16 codepage )
{
if ( codepage == -1 )
codepage = CP_ACP;
return WideCharToMultiByte( codepage, 0, src, -1, dst, 0x7fffffff, NULL, NULL );
}