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/*
* NTDLL wide-char functions
*
* Copyright 2000 Alexandre Julliard
* Copyright 2000 Jon Griffiths
* Copyright 2003 Thomas Mertes
*
* 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 <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include "windef.h"
#include "winbase.h"
#include "winnls.h"
#include "winternl.h"
#include "ntdll_misc.h"
static const unsigned short wctypes[256] =
{
/* 00 */
0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020,
0x0020, 0x0068, 0x0028, 0x0028, 0x0028, 0x0028, 0x0020, 0x0020,
/* 10 */
0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020,
0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020,
/* 20 */
0x0048, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010,
0x0010, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010,
/* 30 */
0x0084, 0x0084, 0x0084, 0x0084, 0x0084, 0x0084, 0x0084, 0x0084,
0x0084, 0x0084, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010,
/* 40 */
0x0010, 0x0181, 0x0181, 0x0181, 0x0181, 0x0181, 0x0181, 0x0101,
0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
/* 50 */
0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
0x0101, 0x0101, 0x0101, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010,
/* 60 */
0x0010, 0x0182, 0x0182, 0x0182, 0x0182, 0x0182, 0x0182, 0x0102,
0x0102, 0x0102, 0x0102, 0x0102, 0x0102, 0x0102, 0x0102, 0x0102,
/* 70 */
0x0102, 0x0102, 0x0102, 0x0102, 0x0102, 0x0102, 0x0102, 0x0102,
0x0102, 0x0102, 0x0102, 0x0010, 0x0010, 0x0010, 0x0010, 0x0020,
/* 80 */
0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020,
0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020,
/* 90 */
0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020,
0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020,
/* a0 */
0x0048, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010,
0x0010, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010,
/* b0 */
0x0010, 0x0010, 0x0014, 0x0014, 0x0010, 0x0010, 0x0010, 0x0010,
0x0010, 0x0014, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010,
/* c0 */
0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
/* d0 */
0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0010,
0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0102,
/* e0 */
0x0102, 0x0102, 0x0102, 0x0102, 0x0102, 0x0102, 0x0102, 0x0102,
0x0102, 0x0102, 0x0102, 0x0102, 0x0102, 0x0102, 0x0102, 0x0102,
/* f0 */
0x0102, 0x0102, 0x0102, 0x0102, 0x0102, 0x0102, 0x0102, 0x0010,
0x0102, 0x0102, 0x0102, 0x0102, 0x0102, 0x0102, 0x0102, 0x0102
};
/*********************************************************************
* _wcsicmp (NTDLL.@)
*/
int __cdecl _wcsicmp( LPCWSTR str1, LPCWSTR str2 )
{
for (;;)
{
WCHAR ch1 = (*str1 >= 'A' && *str1 <= 'Z') ? *str1 + 32 : *str1;
WCHAR ch2 = (*str2 >= 'A' && *str2 <= 'Z') ? *str2 + 32 : *str2;
if (ch1 != ch2 || !*str1) return ch1 - ch2;
str1++;
str2++;
}
}
/*********************************************************************
* _wcslwr (NTDLL.@)
*/
LPWSTR __cdecl _wcslwr( LPWSTR str )
{
WCHAR *ret = str;
while (*str)
{
WCHAR ch = *str;
if (ch >= 'A' && ch <= 'Z') ch += 32;
*str++ = ch;
}
return ret;
}
/*********************************************************************
* _wcsnicmp (NTDLL.@)
*/
int __cdecl _wcsnicmp( LPCWSTR str1, LPCWSTR str2, size_t n )
{
int ret = 0;
for ( ; n > 0; n--, str1++, str2++)
{
WCHAR ch1 = (*str1 >= 'A' && *str1 <= 'Z') ? *str1 + 32 : *str1;
WCHAR ch2 = (*str2 >= 'A' && *str2 <= 'Z') ? *str2 + 32 : *str2;
if ((ret = ch1 - ch2) || !*str1) break;
}
return ret;
}
/*********************************************************************
* _wcsupr (NTDLL.@)
*/
LPWSTR __cdecl _wcsupr( LPWSTR str )
{
WCHAR *ret = str;
while (*str)
{
WCHAR ch = *str;
if (ch >= 'a' && ch <= 'z') ch -= 32;
*str++ = ch;
}
return ret;
}
/***********************************************************************
* wcscpy (NTDLL.@)
*/
LPWSTR __cdecl wcscpy( LPWSTR dst, LPCWSTR src )
{
WCHAR *p = dst;
while ((*p++ = *src++));
return dst;
}
/***********************************************************************
* wcslen (NTDLL.@)
*/
size_t __cdecl wcslen( LPCWSTR str )
{
const WCHAR *s = str;
while (*s) s++;
return s - str;
}
/***********************************************************************
* wcscat (NTDLL.@)
*/
LPWSTR __cdecl wcscat( LPWSTR dst, LPCWSTR src )
{
wcscpy( dst + wcslen(dst), src );
return dst;
}
/*********************************************************************
* wcschr (NTDLL.@)
*/
LPWSTR __cdecl wcschr( LPCWSTR str, WCHAR ch )
{
do { if (*str == ch) return (WCHAR *)(ULONG_PTR)str; } while (*str++);
return NULL;
}
/*********************************************************************
* wcscmp (NTDLL.@)
*/
int __cdecl wcscmp( LPCWSTR str1, LPCWSTR str2 )
{
while (*str1 && (*str1 == *str2)) { str1++; str2++; }
return *str1 - *str2;
}
/*********************************************************************
* wcscspn (NTDLL.@)
*/
size_t __cdecl wcscspn( LPCWSTR str, LPCWSTR reject )
{
const WCHAR *ptr;
for (ptr = str; *ptr; ptr++) if (wcschr( reject, *ptr )) break;
return ptr - str;
}
/*********************************************************************
* wcsncat (NTDLL.@)
*/
LPWSTR __cdecl wcsncat( LPWSTR s1, LPCWSTR s2, size_t n )
{
LPWSTR ret = s1;
while (*s1) s1++;
while (n-- > 0) if (!(*s1++ = *s2++)) return ret;
*s1 = 0;
return ret;
}
/*********************************************************************
* wcsncmp (NTDLL.@)
*/
int __cdecl wcsncmp( LPCWSTR str1, LPCWSTR str2, size_t n )
{
if (n <= 0) return 0;
while ((--n > 0) && *str1 && (*str1 == *str2)) { str1++; str2++; }
return *str1 - *str2;
}
/*********************************************************************
* wcsncpy (NTDLL.@)
*/
#undef wcsncpy
LPWSTR __cdecl wcsncpy( LPWSTR s1, LPCWSTR s2, size_t n )
{
WCHAR *ret = s1;
for ( ; n; n--) if (!(*s1++ = *s2++)) break;
for ( ; n; n--) *s1++ = 0;
return ret;
}
/*********************************************************************
* wcsnlen (NTDLL.@)
*/
size_t __cdecl wcsnlen( const WCHAR *str, size_t len )
{
const WCHAR *s = str;
for (s = str; len && *s; s++, len--) ;
return s - str;
}
/*********************************************************************
* wcspbrk (NTDLL.@)
*/
LPWSTR __cdecl wcspbrk( LPCWSTR str, LPCWSTR accept )
{
for ( ; *str; str++) if (wcschr( accept, *str )) return (WCHAR *)(ULONG_PTR)str;
return NULL;
}
/*********************************************************************
* wcsrchr (NTDLL.@)
*/
LPWSTR __cdecl wcsrchr( LPCWSTR str, WCHAR ch )
{
WCHAR *ret = NULL;
do { if (*str == ch) ret = (WCHAR *)(ULONG_PTR)str; } while (*str++);
return ret;
}
/*********************************************************************
* wcsspn (NTDLL.@)
*/
size_t __cdecl wcsspn( LPCWSTR str, LPCWSTR accept )
{
const WCHAR *ptr;
for (ptr = str; *ptr; ptr++) if (!wcschr( accept, *ptr )) break;
return ptr - str;
}
/*********************************************************************
* wcsstr (NTDLL.@)
*/
LPWSTR __cdecl wcsstr( LPCWSTR str, LPCWSTR sub )
{
while (*str)
{
const WCHAR *p1 = str, *p2 = sub;
while (*p1 && *p2 && *p1 == *p2) { p1++; p2++; }
if (!*p2) return (WCHAR *)str;
str++;
}
return NULL;
}
/*********************************************************************
* wcstok (NTDLL.@)
*/
LPWSTR __cdecl wcstok( LPWSTR str, LPCWSTR delim )
{
static LPWSTR next = NULL;
LPWSTR ret;
if (!str)
if (!(str = next)) return NULL;
while (*str && wcschr( delim, *str )) str++;
if (!*str) return NULL;
ret = str++;
while (*str && !wcschr( delim, *str )) str++;
if (*str) *str++ = 0;
next = str;
return ret;
}
/*********************************************************************
* wcstombs (NTDLL.@)
*/
size_t __cdecl wcstombs( char *dst, const WCHAR *src, size_t n )
{
DWORD len;
if (!dst)
{
RtlUnicodeToMultiByteSize( &len, src, wcslen(src) * sizeof(WCHAR) );
return len;
}
else
{
if (n <= 0) return 0;
RtlUnicodeToMultiByteN( dst, n, &len, src, wcslen(src) * sizeof(WCHAR) );
if (len < n) dst[len] = 0;
}
return len;
}
/*********************************************************************
* mbstowcs (NTDLL.@)
*/
size_t __cdecl mbstowcs( WCHAR *dst, const char *src, size_t n )
{
DWORD len;
if (!dst)
{
RtlMultiByteToUnicodeSize( &len, src, strlen(src) );
}
else
{
if (n <= 0) return 0;
RtlMultiByteToUnicodeN( dst, n*sizeof(WCHAR), &len, src, strlen(src) );
if (len / sizeof(WCHAR) < n) dst[len / sizeof(WCHAR)] = 0;
}
return len / sizeof(WCHAR);
}
/*********************************************************************
* iswctype (NTDLL.@)
*/
INT __cdecl iswctype( WCHAR wc, unsigned short type )
{
if (wc >= 256) return 0;
return wctypes[wc] & type;
}
/*********************************************************************
* iswalpha (NTDLL.@)
*/
INT __cdecl iswalpha( WCHAR wc )
{
if (wc >= 256) return 0;
return wctypes[wc] & (C1_ALPHA | C1_UPPER | C1_LOWER);
}
/*********************************************************************
* iswdigit (NTDLL.@)
*
* Checks if a unicode char wc is a digit
*
* RETURNS
* TRUE: The unicode char wc is a digit.
* FALSE: Otherwise
*/
INT __cdecl iswdigit( WCHAR wc )
{
if (wc >= 256) return 0;
return wctypes[wc] & C1_DIGIT;
}
/*********************************************************************
* iswlower (NTDLL.@)
*
* Checks if a unicode char wc is a lower case letter
*
* RETURNS
* TRUE: The unicode char wc is a lower case letter.
* FALSE: Otherwise
*/
INT __cdecl iswlower( WCHAR wc )
{
if (wc >= 256) return 0;
return wctypes[wc] & C1_LOWER;
}
/*********************************************************************
* iswspace (NTDLL.@)
*
* Checks if a unicode char wc is a white space character
*
* RETURNS
* TRUE: The unicode char wc is a white space character.
* FALSE: Otherwise
*/
INT __cdecl iswspace( WCHAR wc )
{
if (wc >= 256) return 0;
return wctypes[wc] & C1_SPACE;
}
/*********************************************************************
* iswxdigit (NTDLL.@)
*
* Checks if a unicode char wc is an extended digit
*
* RETURNS
* TRUE: The unicode char wc is an extended digit.
* FALSE: Otherwise
*/
INT __cdecl iswxdigit( WCHAR wc )
{
if (wc >= 256) return 0;
return wctypes[wc] & C1_XDIGIT;
}
static int wctoint( WCHAR c )
{
/* NOTE: MAP_FOLDDIGITS supports too many things. */
/* Unicode points that contain digits 0-9; keep this sorted! */
static const WCHAR zeros[] =
{
0x0660, 0x06f0, 0x0966, 0x09e6, 0x0a66, 0x0ae6, 0x0b66, 0x0c66, 0x0ce6,
0x0d66, 0x0e50, 0x0ed0, 0x0f20, 0x1040, 0x17e0, 0x1810, 0xff10
};
int i;
if ('0' <= c && c <= '9') return c - '0';
if ('A' <= c && c <= 'Z') return c - 'A' + 10;
if ('a' <= c && c <= 'z') return c - 'a' + 10;
for (i = 0; i < ARRAY_SIZE(zeros) && c >= zeros[i]; i++)
if (zeros[i] <= c && c <= zeros[i] + 9) return c - zeros[i];
return -1;
}
/*********************************************************************
* wcstol (NTDLL.@)
*/
__msvcrt_long __cdecl wcstol(LPCWSTR s, LPWSTR *end, INT base)
{
BOOL negative = FALSE, empty = TRUE;
LONG ret = 0;
if (base < 0 || base == 1 || base > 36) return 0;
if (end) *end = (WCHAR *)s;
while (iswspace(*s)) s++;
if (*s == '-')
{
negative = TRUE;
s++;
}
else if (*s == '+') s++;
if ((base == 0 || base == 16) && !wctoint( *s ) && (s[1] == 'x' || s[1] == 'X'))
{
base = 16;
s += 2;
}
if (base == 0) base = wctoint( *s ) ? 10 : 8;
while (*s)
{
int v = wctoint( *s );
if (v < 0 || v >= base) break;
if (negative) v = -v;
s++;
empty = FALSE;
if (!negative && (ret > MAXLONG / base || ret * base > MAXLONG - v))
ret = MAXLONG;
else if (negative && (ret < (LONG)MINLONG / base || ret * base < (LONG)(MINLONG - v)))
ret = MINLONG;
else
ret = ret * base + v;
}
if (end && !empty) *end = (WCHAR *)s;
return ret;
}
/*********************************************************************
* wcstoul (NTDLL.@)
*/
__msvcrt_ulong __cdecl wcstoul(LPCWSTR s, LPWSTR *end, INT base)
{
BOOL negative = FALSE, empty = TRUE;
ULONG ret = 0;
if (base < 0 || base == 1 || base > 36) return 0;
if (end) *end = (WCHAR *)s;
while (iswspace(*s)) s++;
if (*s == '-')
{
negative = TRUE;
s++;
}
else if (*s == '+') s++;
if ((base == 0 || base == 16) && !wctoint( *s ) && (s[1] == 'x' || s[1] == 'X'))
{
base = 16;
s += 2;
}
if (base == 0) base = wctoint( *s ) ? 10 : 8;
while (*s)
{
int v = wctoint( *s );
if (v < 0 || v >= base) break;
s++;
empty = FALSE;
if (ret > MAXDWORD / base || ret * base > MAXDWORD - v)
ret = MAXDWORD;
else
ret = ret * base + v;
}
if (end && !empty) *end = (WCHAR *)s;
return negative ? -ret : ret;
}
/*********************************************************************
* _ultow (NTDLL.@)
*
* Converts an unsigned long integer to a unicode string.
*
* RETURNS
* Always returns str.
*
* NOTES
* Converts value to a '\0' terminated wstring which is copied to str.
* The maximum length of the copied str is 33 bytes.
* Does not check if radix is in the range of 2 to 36.
* If str is NULL it just returns NULL.
*/
LPWSTR __cdecl _ultow( __msvcrt_ulong value, LPWSTR str, INT radix )
{
WCHAR buffer[33];
PWCHAR pos;
WCHAR digit;
pos = &buffer[32];
*pos = '\0';
do {
digit = value % radix;
value = value / radix;
if (digit < 10) {
*--pos = '0' + digit;
} else {
*--pos = 'a' + digit - 10;
} /* if */
} while (value != 0L);
if (str != NULL) {
memcpy(str, pos, (&buffer[32] - pos + 1) * sizeof(WCHAR));
} /* if */
return str;
}
/*********************************************************************
* _ltow (NTDLL.@)
*
* Converts a long integer to a unicode string.
*
* RETURNS
* Always returns str.
*
* NOTES
* Converts value to a '\0' terminated wstring which is copied to str.
* The maximum length of the copied str is 33 bytes. If radix
* is 10 and value is negative, the value is converted with sign.
* Does not check if radix is in the range of 2 to 36.
* If str is NULL it just returns NULL.
*/
LPWSTR __cdecl _ltow( __msvcrt_long value, LPWSTR str, INT radix )
{
ULONG val;
int negative;
WCHAR buffer[33];
PWCHAR pos;
WCHAR digit;
if (value < 0 && radix == 10) {
negative = 1;
val = -value;
} else {
negative = 0;
val = value;
} /* if */
pos = &buffer[32];
*pos = '\0';
do {
digit = val % radix;
val = val / radix;
if (digit < 10) {
*--pos = '0' + digit;
} else {
*--pos = 'a' + digit - 10;
} /* if */
} while (val != 0L);
if (negative) {
*--pos = '-';
} /* if */
if (str != NULL) {
memcpy(str, pos, (&buffer[32] - pos + 1) * sizeof(WCHAR));
} /* if */
return str;
}
/*********************************************************************
* _itow (NTDLL.@)
*
* Converts an integer to a unicode string.
*
* RETURNS
* Always returns str.
*
* NOTES
* Converts value to a '\0' terminated wstring which is copied to str.
* The maximum length of the copied str is 33 bytes. If radix
* is 10 and value is negative, the value is converted with sign.
* Does not check if radix is in the range of 2 to 36.
* If str is NULL it just returns NULL.
*
* DIFFERENCES
* - The native function crashes when the string is longer than 19 chars.
* This function does not have this bug.
*/
LPWSTR __cdecl _itow(
int value, /* [I] Value to be converted */
LPWSTR str, /* [O] Destination for the converted value */
INT radix) /* [I] Number base for conversion */
{
return _ltow(value, str, radix);
}
/*********************************************************************
* _ui64tow (NTDLL.@)
*
* Converts a large unsigned integer to a unicode string.
*
* RETURNS
* Always returns str.
*
* NOTES
* Converts value to a '\0' terminated wstring which is copied to str.
* The maximum length of the copied str is 33 bytes.
* Does not check if radix is in the range of 2 to 36.
* If str is NULL it just returns NULL.
*
* DIFFERENCES
* - This function does not exist in the native DLL (but in msvcrt).
* But since the maintenance of all these functions is better done
* in one place we implement it here.
*/
LPWSTR __cdecl _ui64tow(
ULONGLONG value, /* [I] Value to be converted */
LPWSTR str, /* [O] Destination for the converted value */
INT radix) /* [I] Number base for conversion */
{
WCHAR buffer[65];
PWCHAR pos;
WCHAR digit;
pos = &buffer[64];
*pos = '\0';
do {
digit = value % radix;
value = value / radix;
if (digit < 10) {
*--pos = '0' + digit;
} else {
*--pos = 'a' + digit - 10;
} /* if */
} while (value != 0L);
if (str != NULL) {
memcpy(str, pos, (&buffer[64] - pos + 1) * sizeof(WCHAR));
} /* if */
return str;
}
/*********************************************************************
* _i64tow (NTDLL.@)
*
* Converts a large integer to a unicode string.
*
* RETURNS
* Always returns str.
*
* NOTES
* Converts value to a '\0' terminated wstring which is copied to str.
* The maximum length of the copied str is 33 bytes. If radix
* is 10 and value is negative, the value is converted with sign.
* Does not check if radix is in the range of 2 to 36.
* If str is NULL it just returns NULL.
*
* DIFFERENCES
* - The native DLL converts negative values (for base 10) wrong:
* -1 is converted to -18446744073709551615
* -2 is converted to -18446744073709551614
* -9223372036854775807 is converted to -9223372036854775809
* -9223372036854775808 is converted to -9223372036854775808
* The native msvcrt _i64tow function and our ntdll function do
* not have this bug.
*/
LPWSTR __cdecl _i64tow(
LONGLONG value, /* [I] Value to be converted */
LPWSTR str, /* [O] Destination for the converted value */
INT radix) /* [I] Number base for conversion */
{
ULONGLONG val;
int negative;
WCHAR buffer[65];
PWCHAR pos;
WCHAR digit;
if (value < 0 && radix == 10) {
negative = 1;
val = -value;
} else {
negative = 0;
val = value;
} /* if */
pos = &buffer[64];
*pos = '\0';
do {
digit = val % radix;
val = val / radix;
if (digit < 10) {
*--pos = '0' + digit;
} else {
*--pos = 'a' + digit - 10;
} /* if */
} while (val != 0L);
if (negative) {
*--pos = '-';
} /* if */
if (str != NULL) {
memcpy(str, pos, (&buffer[64] - pos + 1) * sizeof(WCHAR));
} /* if */
return str;
}
/*********************************************************************
* _wtol (NTDLL.@)
*
* Converts a unicode string to a long integer.
*
* PARAMS
* str [I] Wstring to be converted
*
* RETURNS
* On success it returns the integer value otherwise it returns 0.
*
* NOTES
* Accepts: {whitespace} [+|-] {digits}
* No check is made for value overflow, only the lower 32 bits are assigned.
* If str is NULL it crashes, as the native function does.
*/
__msvcrt_long __cdecl _wtol( LPCWSTR str )
{
ULONG RunningTotal = 0;
BOOL bMinus = FALSE;
while (iswspace(*str)) str++;
if (*str == '+') {
str++;
} else if (*str == '-') {
bMinus = TRUE;
str++;
} /* if */
while (*str >= '0' && *str <= '9') {
RunningTotal = RunningTotal * 10 + *str - '0';
str++;
} /* while */
return bMinus ? -RunningTotal : RunningTotal;
}
/*********************************************************************
* _wtoi (NTDLL.@)
*
* Converts a unicode string to an integer.
*
* PARAMS
* str [I] Wstring to be converted
*
* RETURNS
* On success it returns the integer value otherwise it returns 0.
*
* NOTES
* Accepts: {whitespace} [+|-] {digits}
* No check is made for value overflow, only the lower 32 bits are assigned.
* If str is NULL it crashes, as the native function does.
*/
int __cdecl _wtoi( LPCWSTR str )
{
return _wtol(str);
}
/*********************************************************************
* _wtoi64 (NTDLL.@)
*
* Converts a unicode string to a large integer.
*
* PARAMS
* str [I] Wstring to be converted
*
* RETURNS
* On success it returns the integer value otherwise it returns 0.
*
* NOTES
* Accepts: {whitespace} [+|-] {digits}
* No check is made for value overflow, only the lower 64 bits are assigned.
* If str is NULL it crashes, as the native function does.
*/
LONGLONG __cdecl _wtoi64( LPCWSTR str )
{
ULONGLONG RunningTotal = 0;
BOOL bMinus = FALSE;
while (iswspace(*str)) str++;
if (*str == '+') {
str++;
} else if (*str == '-') {
bMinus = TRUE;
str++;
} /* if */
while (*str >= '0' && *str <= '9') {
RunningTotal = RunningTotal * 10 + *str - '0';
str++;
} /* while */
return bMinus ? -RunningTotal : RunningTotal;
}
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