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msvcrt: Optimize _strupr implementation in C locale. 

Don't write to input buffer when there's nothing to change.

Signed-off-by: Piotr Caban <piotr@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Piotr Caban 2018-03-22 18:51:50 +01:00 committed by Alexandre Julliard
parent 1184f9d969
commit 52415cabb0
1 changed files with 21 additions and 3 deletions
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24
dlls/msvcrt/string.c
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@ -117,6 +117,7 @@ char* CDECL MSVCRT__strlwr(char *str)
*/
int CDECL MSVCRT__strupr_s_l(char *str, MSVCRT_size_t len, MSVCRT__locale_t locale)
{
MSVCRT_pthreadlocinfo locinfo;
char *ptr = str;
if (!str || !len)
@ -138,10 +139,27 @@ int CDECL MSVCRT__strupr_s_l(char *str, MSVCRT_size_t len, MSVCRT__locale_t loca
return MSVCRT_EINVAL;
}
while (*str)
if(!locale)
locinfo = get_locinfo();
else
locinfo = locale->locinfo;
if(!locinfo->lc_handle[MSVCRT_LC_CTYPE])
{
*str = MSVCRT__toupper_l((unsigned char)*str, locale);
str++;
while (*str)
{
if (*str >= 'a' && *str <= 'z')
*str -= 'a' - 'A';
str++;
}
}
else
{
while (*str)
{
*str = MSVCRT__toupper_l((unsigned char)*str, locale);
str++;
}
}
return 0;