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msvcrt: Convert data to multibyte encoding in ungetwc if needed.

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This commit is contained in:
Piotr Caban 2013-12-30 16:55:42 +01:00 committed by Alexandre Julliard
parent 71687bef17
commit 6122c2ba37
1 changed files with 25 additions and 4 deletions
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29
dlls/msvcrt/file.c
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@ -4730,18 +4730,39 @@ int CDECL MSVCRT_ungetc(int c, MSVCRT_FILE * file)
MSVCRT_wint_t CDECL MSVCRT_ungetwc(MSVCRT_wint_t wc, MSVCRT_FILE * file)
{
MSVCRT_wchar_t mwc = wc;
unsigned char * pp = (unsigned char *)&mwc;
int i;
if (wc == MSVCRT_WEOF)
return MSVCRT_WEOF;
MSVCRT__lock_file(file);
for(i=sizeof(MSVCRT_wchar_t)-1;i>=0;i--) {
if(pp[i] != MSVCRT_ungetc(pp[i],file)) {
if((msvcrt_get_ioinfo(file->_file)->exflag & (EF_UTF8 | EF_UTF16))
|| !(msvcrt_get_ioinfo(file->_file)->wxflag & WX_TEXT)) {
unsigned char * pp = (unsigned char *)&mwc;
int i;
for(i=sizeof(MSVCRT_wchar_t)-1;i>=0;i--) {
if(pp[i] != MSVCRT_ungetc(pp[i],file)) {
MSVCRT__unlock_file(file);
return MSVCRT_WEOF;
}
}
}else {
char mbs[MSVCRT_MB_LEN_MAX];
int len;
len = MSVCRT_wctomb(mbs, mwc);
if(len == -1) {
MSVCRT__unlock_file(file);
return MSVCRT_WEOF;
}
for(len--; len>=0; len--) {
if(mbs[len] != MSVCRT_ungetc(mbs[len], file)) {
MSVCRT__unlock_file(file);
return MSVCRT_WEOF;
}
}
}
MSVCRT__unlock_file(file);