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/*
* Rtl string functions
*
* Copyright (C) 1996-1998 Marcus Meissner
* Copyright (C) 2000 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 "config.h"
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "ntddk.h"
#include "wine/unicode.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(ntdll);
UINT NlsAnsiCodePage = 1252;
BYTE NlsMbCodePageTag = 0;
BYTE NlsMbOemCodePageTag = 0;
static const union cptable *ansi_table;
static const union cptable *oem_table;
inline static const union cptable *get_ansi_table(void)
{
if (!ansi_table) ansi_table = cp_get_table( 1252 );
return ansi_table;
}
inline static const union cptable *get_oem_table(void)
{
if (!oem_table) oem_table = cp_get_table( 437 );
return oem_table;
}
/**************************************************************************
* __wine_init_codepages (NTDLL.@)
*
* Set the code page once kernel32 is loaded. Should be done differently.
*/
void __wine_init_codepages( const union cptable *ansi, const union cptable *oem )
{
ansi_table = ansi;
oem_table = oem;
NlsAnsiCodePage = ansi->info.codepage;
}
/**************************************************************************
* RtlInitAnsiString (NTDLL.@)
*/
void WINAPI RtlInitAnsiString( PSTRING target, LPCSTR source)
{
if ((target->Buffer = (LPSTR)source))
{
target->Length = strlen(source);
target->MaximumLength = target->Length + 1;
}
else target->Length = target->MaximumLength = 0;
}
/**************************************************************************
* RtlInitString (NTDLL.@)
*/
void WINAPI RtlInitString( PSTRING target, LPCSTR source )
{
RtlInitAnsiString( target, source );
}
/**************************************************************************
* RtlFreeAnsiString (NTDLL.@)
*/
void WINAPI RtlFreeAnsiString( PSTRING str )
{
if (str->Buffer) RtlFreeHeap( GetProcessHeap(), 0, str->Buffer );
}
/**************************************************************************
* RtlFreeOemString (NTDLL.@)
*/
void WINAPI RtlFreeOemString( PSTRING str )
{
RtlFreeAnsiString( str );
}
/**************************************************************************
* RtlCopyString (NTDLL.@)
*/
void WINAPI RtlCopyString( STRING *dst, const STRING *src )
{
if (src)
{
unsigned int len = min( src->Length, dst->MaximumLength );
memcpy( dst->Buffer, src->Buffer, len );
dst->Length = len;
}
else dst->Length = 0;
}
/**************************************************************************
* RtlInitUnicodeString (NTDLL.@)
*/
void WINAPI RtlInitUnicodeString( PUNICODE_STRING target, LPCWSTR source )
{
if ((target->Buffer = (LPWSTR)source))
{
target->Length = strlenW(source) * sizeof(WCHAR);
target->MaximumLength = target->Length + sizeof(WCHAR);
}
else target->Length = target->MaximumLength = 0;
}
/**************************************************************************
* RtlCreateUnicodeString (NTDLL.@)
*/
BOOLEAN WINAPI RtlCreateUnicodeString( PUNICODE_STRING target, LPCWSTR src )
{
int len = (strlenW(src) + 1) * sizeof(WCHAR);
if (!(target->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, len ))) return FALSE;
memcpy( target->Buffer, src, len );
target->MaximumLength = len;
target->Length = len - 2;
return TRUE;
}
/**************************************************************************
* RtlCreateUnicodeStringFromAsciiz (NTDLL.@)
*/
BOOLEAN WINAPI RtlCreateUnicodeStringFromAsciiz( PUNICODE_STRING target, LPCSTR src )
{
STRING ansi;
RtlInitAnsiString( &ansi, src );
return !RtlAnsiStringToUnicodeString( target, &ansi, TRUE );
}
/**************************************************************************
* RtlFreeUnicodeString (NTDLL.@)
*/
void WINAPI RtlFreeUnicodeString( PUNICODE_STRING str )
{
if (str->Buffer) RtlFreeHeap( GetProcessHeap(), 0, str->Buffer );
}
/**************************************************************************
* RtlCopyUnicodeString (NTDLL.@)
*/
void WINAPI RtlCopyUnicodeString( UNICODE_STRING *dst, const UNICODE_STRING *src )
{
if (src)
{
unsigned int len = min( src->Length, dst->MaximumLength );
memcpy( dst->Buffer, src->Buffer, len );
dst->Length = len;
/* append terminating NULL if enough space */
if (len < dst->MaximumLength) dst->Buffer[len / sizeof(WCHAR)] = 0;
}
else dst->Length = 0;
}
/**************************************************************************
* RtlEraseUnicodeString (NTDLL.@)
*/
void WINAPI RtlEraseUnicodeString( UNICODE_STRING *str )
{
if (str->Buffer)
{
memset( str->Buffer, 0, str->MaximumLength );
str->Length = 0;
}
}
/*
COMPARISON FUNCTIONS
*/
/******************************************************************************
* RtlCompareString (NTDLL.@)
*/
LONG WINAPI RtlCompareString( const STRING *s1, const STRING *s2, BOOLEAN CaseInsensitive )
{
unsigned int len;
LONG ret = 0;
LPCSTR p1, p2;
len = min(s1->Length, s2->Length);
p1 = s1->Buffer;
p2 = s2->Buffer;
if (CaseInsensitive)
{
while (!ret && len--) ret = toupper(*p1++) - toupper(*p2++);
}
else
{
while (!ret && len--) ret = *p1++ - *p2++;
}
if (!ret) ret = s1->Length - s2->Length;
return ret;
}
/******************************************************************************
* RtlCompareUnicodeString (NTDLL.@)
*/
LONG WINAPI RtlCompareUnicodeString( const UNICODE_STRING *s1, const UNICODE_STRING *s2,
BOOLEAN CaseInsensitive )
{
unsigned int len;
LONG ret = 0;
LPCWSTR p1, p2;
len = min(s1->Length, s2->Length) / sizeof(WCHAR);
p1 = s1->Buffer;
p2 = s2->Buffer;
if (CaseInsensitive)
{
while (!ret && len--) ret = toupperW(*p1++) - toupperW(*p2++);
}
else
{
while (!ret && len--) ret = *p1++ - *p2++;
}
if (!ret) ret = s1->Length - s2->Length;
return ret;
}
/**************************************************************************
* RtlEqualString (NTDLL.@)
*/
BOOLEAN WINAPI RtlEqualString( const STRING *s1, const STRING *s2, BOOLEAN CaseInsensitive )
{
if (s1->Length != s2->Length) return FALSE;
return !RtlCompareString( s1, s2, CaseInsensitive );
}
/**************************************************************************
* RtlEqualUnicodeString (NTDLL.@)
*/
BOOLEAN WINAPI RtlEqualUnicodeString( const UNICODE_STRING *s1, const UNICODE_STRING *s2,
BOOLEAN CaseInsensitive )
{
if (s1->Length != s2->Length) return FALSE;
return !RtlCompareUnicodeString( s1, s2, CaseInsensitive );
}
/**************************************************************************
* RtlPrefixString (NTDLL.@)
*
* Test if s1 is a prefix in s2
*/
BOOLEAN WINAPI RtlPrefixString( const STRING *s1, const STRING *s2, BOOLEAN ignore_case )
{
unsigned int i;
if (s1->Length > s2->Length) return FALSE;
if (ignore_case)
{
for (i = 0; i < s1->Length; i++)
if (toupper(s1->Buffer[i]) != toupper(s2->Buffer[i])) return FALSE;
}
else
{
for (i = 0; i < s1->Length; i++)
if (s1->Buffer[i] != s2->Buffer[i]) return FALSE;
}
return TRUE;
}
/**************************************************************************
* RtlPrefixUnicodeString (NTDLL.@)
*
* Test if s1 is a prefix in s2
*/
BOOLEAN WINAPI RtlPrefixUnicodeString( const UNICODE_STRING *s1,
const UNICODE_STRING *s2,
BOOLEAN ignore_case )
{
unsigned int i;
if (s1->Length > s2->Length) return FALSE;
if (ignore_case)
{
for (i = 0; i < s1->Length / sizeof(WCHAR); i++)
if (toupper(s1->Buffer[i]) != toupper(s2->Buffer[i])) return FALSE;
}
else
{
for (i = 0; i < s1->Length / sizeof(WCHAR); i++)
if (s1->Buffer[i] != s2->Buffer[i]) return FALSE;
}
return TRUE;
}
/*
COPY BETWEEN ANSI_STRING or UNICODE_STRING
there is no parameter checking, it just crashes
*/
/**************************************************************************
* RtlAnsiStringToUnicodeString (NTDLL.@)
*
* NOTES:
* writes terminating 0
*/
NTSTATUS WINAPI RtlAnsiStringToUnicodeString( UNICODE_STRING *uni,
const STRING *ansi,
BOOLEAN doalloc )
{
DWORD total = RtlAnsiStringToUnicodeSize( ansi );
if (total > 0xffff) return STATUS_INVALID_PARAMETER_2;
uni->Length = total - sizeof(WCHAR);
if (doalloc)
{
uni->MaximumLength = total;
if (!(uni->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, total ))) return STATUS_NO_MEMORY;
}
else if (total > uni->MaximumLength) return STATUS_BUFFER_OVERFLOW;
RtlMultiByteToUnicodeN( uni->Buffer, uni->Length, NULL, ansi->Buffer, ansi->Length );
uni->Buffer[uni->Length / sizeof(WCHAR)] = 0;
return STATUS_SUCCESS;
}
/**************************************************************************
* RtlOemStringToUnicodeString (NTDLL.@)
*
* NOTES
* writes terminating 0
* if resulting length > 0xffff it returns STATUS_INVALID_PARAMETER_2
*/
NTSTATUS WINAPI RtlOemStringToUnicodeString( UNICODE_STRING *uni,
const STRING *oem,
BOOLEAN doalloc )
{
DWORD total = RtlOemStringToUnicodeSize( oem );
if (total > 0xffff) return STATUS_INVALID_PARAMETER_2;
uni->Length = total - sizeof(WCHAR);
if (doalloc)
{
uni->MaximumLength = total;
if (!(uni->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, total ))) return STATUS_NO_MEMORY;
}
else if (total > uni->MaximumLength) return STATUS_BUFFER_OVERFLOW;
RtlOemToUnicodeN( uni->Buffer, uni->Length, NULL, oem->Buffer, oem->Length );
uni->Buffer[uni->Length / sizeof(WCHAR)] = 0;
return STATUS_SUCCESS;
}
/**************************************************************************
* RtlUnicodeStringToAnsiString (NTDLL.@)
*
* NOTES
* writes terminating 0
* copies a part if the buffer is too small
*/
NTSTATUS WINAPI RtlUnicodeStringToAnsiString( STRING *ansi,
const UNICODE_STRING *uni,
BOOLEAN doalloc )
{
NTSTATUS ret = STATUS_SUCCESS;
DWORD len = RtlUnicodeStringToAnsiSize( uni );
ansi->Length = len - 1;
if (doalloc)
{
ansi->MaximumLength = len;
if (!(ansi->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, len ))) return STATUS_NO_MEMORY;
}
else if (ansi->MaximumLength < len)
{
if (!ansi->MaximumLength) return STATUS_BUFFER_OVERFLOW;
ansi->Length = ansi->MaximumLength - 1;
ret = STATUS_BUFFER_OVERFLOW;
}
RtlUnicodeToMultiByteN( ansi->Buffer, ansi->Length, NULL, uni->Buffer, uni->Length );
ansi->Buffer[ansi->Length] = 0;
return ret;
}
/**************************************************************************
* RtlUnicodeStringToOemString (NTDLL.@)
*
* NOTES
* allocates uni->Length+1
* writes terminating 0
*/
NTSTATUS WINAPI RtlUnicodeStringToOemString( STRING *oem,
const UNICODE_STRING *uni,
BOOLEAN doalloc )
{
NTSTATUS ret = STATUS_SUCCESS;
DWORD len = RtlUnicodeStringToOemSize( uni );
oem->Length = len - 1;
if (doalloc)
{
oem->MaximumLength = len;
if (!(oem->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, len ))) return STATUS_NO_MEMORY;
}
else if (oem->MaximumLength < len)
{
if (!oem->MaximumLength) return STATUS_BUFFER_OVERFLOW;
oem->Length = oem->MaximumLength - 1;
ret = STATUS_BUFFER_OVERFLOW;
}
RtlUnicodeToOemN( oem->Buffer, oem->Length, NULL, uni->Buffer, uni->Length );
oem->Buffer[oem->Length] = 0;
return ret;
}
/**************************************************************************
* RtlMultiByteToUnicodeN (NTDLL.@)
*
* NOTES
* if unistr is too small a part is copied
*/
NTSTATUS WINAPI RtlMultiByteToUnicodeN( LPWSTR dst, DWORD dstlen, LPDWORD reslen,
LPCSTR src, DWORD srclen )
{
int ret = cp_mbstowcs( get_ansi_table(), 0, src, srclen, dst, dstlen/sizeof(WCHAR) );
if (reslen)
*reslen = (ret >= 0) ? ret*sizeof(WCHAR) : dstlen; /* overflow -> we filled up to dstlen */
return STATUS_SUCCESS;
}
/**************************************************************************
* RtlOemToUnicodeN (NTDLL.@)
*/
NTSTATUS WINAPI RtlOemToUnicodeN( LPWSTR dst, DWORD dstlen, LPDWORD reslen,
LPCSTR src, DWORD srclen )
{
int ret = cp_mbstowcs( get_oem_table(), 0, src, srclen, dst, dstlen/sizeof(WCHAR) );
if (reslen)
*reslen = (ret >= 0) ? ret*sizeof(WCHAR) : dstlen; /* overflow -> we filled up to dstlen */
return STATUS_SUCCESS;
}
/**************************************************************************
* RtlUnicodeToMultiByteN (NTDLL.@)
*/
NTSTATUS WINAPI RtlUnicodeToMultiByteN( LPSTR dst, DWORD dstlen, LPDWORD reslen,
LPCWSTR src, DWORD srclen )
{
int ret = cp_wcstombs( get_ansi_table(), 0, src, srclen / sizeof(WCHAR),
dst, dstlen, NULL, NULL );
if (reslen)
*reslen = (ret >= 0) ? ret : dstlen; /* overflow -> we filled up to dstlen */
return STATUS_SUCCESS;
}
/**************************************************************************
* RtlUnicodeToOemN (NTDLL.@)
*/
NTSTATUS WINAPI RtlUnicodeToOemN( LPSTR dst, DWORD dstlen, LPDWORD reslen,
LPCWSTR src, DWORD srclen )
{
int ret = cp_wcstombs( get_oem_table(), 0, src, srclen / sizeof(WCHAR),
dst, dstlen, NULL, NULL );
if (reslen)
*reslen = (ret >= 0) ? ret : dstlen; /* overflow -> we filled up to dstlen */
return STATUS_SUCCESS;
}
/*
CASE CONVERSIONS
*/
/**************************************************************************
* RtlUpperString (NTDLL.@)
*/
void WINAPI RtlUpperString( STRING *dst, const STRING *src )
{
unsigned int i, len = min(src->Length, dst->MaximumLength);
for (i = 0; i < len; i++) dst->Buffer[i] = toupper(src->Buffer[i]);
dst->Length = len;
}
/**************************************************************************
* RtlUpcaseUnicodeString (NTDLL.@)
*
* NOTES:
* destination string is never 0-terminated because dest can be equal to src
* and src might be not 0-terminated
* dest.Length only set when success
*/
NTSTATUS WINAPI RtlUpcaseUnicodeString( UNICODE_STRING *dest,
const UNICODE_STRING *src,
BOOLEAN doalloc )
{
DWORD i, len = src->Length;
if (doalloc)
{
dest->MaximumLength = len;
if (!(dest->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, len ))) return STATUS_NO_MEMORY;
}
else if (len > dest->MaximumLength) return STATUS_BUFFER_OVERFLOW;
for (i = 0; i < len/sizeof(WCHAR); i++) dest->Buffer[i] = toupperW(src->Buffer[i]);
dest->Length = len;
return STATUS_SUCCESS;
}
/**************************************************************************
* RtlUpcaseUnicodeStringToAnsiString (NTDLL.@)
*
* NOTES
* writes terminating 0
*/
NTSTATUS WINAPI RtlUpcaseUnicodeStringToAnsiString( STRING *dst,
const UNICODE_STRING *src,
BOOLEAN doalloc )
{
NTSTATUS ret;
UNICODE_STRING upcase;
if (!(ret = RtlUpcaseUnicodeString( &upcase, src, TRUE )))
{
ret = RtlUnicodeStringToAnsiString( dst, &upcase, doalloc );
RtlFreeUnicodeString( &upcase );
}
return ret;
}
/**************************************************************************
* RtlUpcaseUnicodeStringToOemString (NTDLL.@)
*
* NOTES
* writes terminating 0
*/
NTSTATUS WINAPI RtlUpcaseUnicodeStringToOemString( STRING *dst,
const UNICODE_STRING *src,
BOOLEAN doalloc )
{
NTSTATUS ret;
UNICODE_STRING upcase;
if (!(ret = RtlUpcaseUnicodeString( &upcase, src, TRUE )))
{
ret = RtlUnicodeStringToOemString( dst, &upcase, doalloc );
RtlFreeUnicodeString( &upcase );
}
return ret;
}
/**************************************************************************
* RtlUpcaseUnicodeToMultiByteN (NTDLL.@)
*/
NTSTATUS WINAPI RtlUpcaseUnicodeToMultiByteN( LPSTR dst, DWORD dstlen, LPDWORD reslen,
LPCWSTR src, DWORD srclen )
{
NTSTATUS ret;
LPWSTR upcase;
DWORD i;
if (!(upcase = RtlAllocateHeap( GetProcessHeap(), 0, srclen ))) return STATUS_NO_MEMORY;
for (i = 0; i < srclen/sizeof(WCHAR); i++) upcase[i] = toupperW(src[i]);
ret = RtlUnicodeToMultiByteN( dst, dstlen, reslen, upcase, srclen );
RtlFreeHeap( GetProcessHeap(), 0, upcase );
return ret;
}
/**************************************************************************
* RtlUpcaseUnicodeToOemN (NTDLL.@)
*/
NTSTATUS WINAPI RtlUpcaseUnicodeToOemN( LPSTR dst, DWORD dstlen, LPDWORD reslen,
LPCWSTR src, DWORD srclen )
{
NTSTATUS ret;
LPWSTR upcase;
DWORD i;
if (!(upcase = RtlAllocateHeap( GetProcessHeap(), 0, srclen ))) return STATUS_NO_MEMORY;
for (i = 0; i < srclen/sizeof(WCHAR); i++) upcase[i] = toupperW(src[i]);
ret = RtlUnicodeToOemN( dst, dstlen, reslen, upcase, srclen );
RtlFreeHeap( GetProcessHeap(), 0, upcase );
return ret;
}
/*
STRING SIZE
*/
/**************************************************************************
* RtlOemStringToUnicodeSize (NTDLL.@)
* RtlxOemStringToUnicodeSize (NTDLL.@)
*
* Return the size in bytes necessary for the Unicode conversion of 'str',
* including the terminating NULL.
*/
UINT WINAPI RtlOemStringToUnicodeSize( const STRING *str )
{
int ret = cp_mbstowcs( get_oem_table(), 0, str->Buffer, str->Length, NULL, 0 );
return (ret + 1) * sizeof(WCHAR);
}
/**************************************************************************
* RtlAnsiStringToUnicodeSize (NTDLL.@)
* RtlxAnsiStringToUnicodeSize (NTDLL.@)
*
* Return the size in bytes necessary for the Unicode conversion of 'str',
* including the terminating NULL.
*/
DWORD WINAPI RtlAnsiStringToUnicodeSize( const STRING *str )
{
DWORD ret;
RtlMultiByteToUnicodeSize( &ret, str->Buffer, str->Length );
return ret + sizeof(WCHAR);
}
/**************************************************************************
* RtlMultiByteToUnicodeSize (NTDLL.@)
*
* Compute the size in bytes necessary for the Unicode conversion of 'str',
* without the terminating NULL.
*/
NTSTATUS WINAPI RtlMultiByteToUnicodeSize( DWORD *size, LPCSTR str, UINT len )
{
*size = cp_mbstowcs( get_ansi_table(), 0, str, len, NULL, 0 ) * sizeof(WCHAR);
return STATUS_SUCCESS;
}
/**************************************************************************
* RtlUnicodeToMultiByteSize (NTDLL.@)
*
* Compute the size necessary for the multibyte conversion of 'str',
* without the terminating NULL.
*/
NTSTATUS WINAPI RtlUnicodeToMultiByteSize( DWORD *size, LPCWSTR str, UINT len )
{
*size = cp_wcstombs( get_ansi_table(), 0, str, len / sizeof(WCHAR), NULL, 0, NULL, NULL );
return STATUS_SUCCESS;
}
/**************************************************************************
* RtlUnicodeStringToAnsiSize (NTDLL.@)
* RtlxUnicodeStringToAnsiSize (NTDLL.@)
*
* Return the size in bytes necessary for the Ansi conversion of 'str',
* including the terminating NULL.
*/
DWORD WINAPI RtlUnicodeStringToAnsiSize( const UNICODE_STRING *str )
{
DWORD ret;
RtlUnicodeToMultiByteSize( &ret, str->Buffer, str->Length );
return ret + 1;
}
/**************************************************************************
* RtlUnicodeStringToOemSize (NTDLL.@)
* RtlxUnicodeStringToOemSize (NTDLL.@)
*
* Return the size in bytes necessary for the OEM conversion of 'str',
* including the terminating NULL.
*/
DWORD WINAPI RtlUnicodeStringToOemSize( const UNICODE_STRING *str )
{
return cp_wcstombs( get_oem_table(), 0, str->Buffer, str->Length / sizeof(WCHAR),
NULL, 0, NULL, NULL ) + 1;
}
/**************************************************************************
* RtlAppendStringToString (NTDLL.@)
*/
NTSTATUS WINAPI RtlAppendStringToString( STRING *dst, const STRING *src )
{
unsigned int len = src->Length + dst->Length;
if (len > dst->MaximumLength) return STATUS_BUFFER_TOO_SMALL;
memcpy( dst->Buffer + dst->Length, src->Buffer, src->Length );
dst->Length = len;
return STATUS_SUCCESS;
}
/**************************************************************************
* RtlAppendAsciizToString (NTDLL.@)
*/
NTSTATUS WINAPI RtlAppendAsciizToString( STRING *dst, LPCSTR src )
{
if (src)
{
unsigned int srclen = strlen(src);
unsigned int total = srclen + dst->Length;
if (total > dst->MaximumLength) return STATUS_BUFFER_TOO_SMALL;
memcpy( dst->Buffer + dst->Length, src, srclen );
dst->Length = total;
}
return STATUS_SUCCESS;
}
/**************************************************************************
* RtlAppendUnicodeToString (NTDLL.@)
*/
NTSTATUS WINAPI RtlAppendUnicodeToString( UNICODE_STRING *dst, LPCWSTR src )
{
if (src)
{
unsigned int srclen = strlenW(src) * sizeof(WCHAR);
unsigned int total = srclen + dst->Length;
if (total > dst->MaximumLength) return STATUS_BUFFER_TOO_SMALL;
memcpy( dst->Buffer + dst->Length/sizeof(WCHAR), src, srclen );
dst->Length = total;
/* append terminating NULL if enough space */
if (total < dst->MaximumLength) dst->Buffer[total / sizeof(WCHAR)] = 0;
}
return STATUS_SUCCESS;
}
/**************************************************************************
* RtlAppendUnicodeStringToString (NTDLL.@)
*/
NTSTATUS WINAPI RtlAppendUnicodeStringToString( UNICODE_STRING *dst, const UNICODE_STRING *src )
{
unsigned int len = src->Length + dst->Length;
if (len > dst->MaximumLength) return STATUS_BUFFER_TOO_SMALL;
memcpy( dst->Buffer + dst->Length/sizeof(WCHAR), src->Buffer, src->Length );
dst->Length = len;
/* append terminating NULL if enough space */
if (len < dst->MaximumLength) dst->Buffer[len / sizeof(WCHAR)] = 0;
return STATUS_SUCCESS;
}
/*
MISC
*/
/**************************************************************************
* RtlIsTextUnicode (NTDLL.@)
*
* Apply various feeble heuristics to guess whether
* the text buffer contains Unicode.
* FIXME: should implement more tests.
*/
DWORD WINAPI RtlIsTextUnicode(
LPVOID buf,
DWORD len,
DWORD *pf)
{
LPWSTR s = buf;
DWORD flags = -1, out_flags = 0;
if (!len)
goto out;
if (pf)
flags = *pf;
/*
* Apply various tests to the text string. According to the
* docs, each test "passed" sets the corresponding flag in
* the output flags. But some of the tests are mutually
* exclusive, so I don't see how you could pass all tests ...
*/
/* Check for an odd length ... pass if even. */
if (!(len & 1))
out_flags |= IS_TEXT_UNICODE_ODD_LENGTH;
/* Check for the special unicode marker byte. */
if (*s == 0xFEFF)
out_flags |= IS_TEXT_UNICODE_SIGNATURE;
/*
* Check whether the string passed all of the tests.
*/
flags &= ITU_IMPLEMENTED_TESTS;
if ((out_flags & flags) != flags)
len = 0;
out:
if (pf)
*pf = out_flags;
return len;
}
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