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* Update ungetwc().
CORE-8080

svn path=/trunk/; revision=63418
This commit is contained in:
Amine Khaldi 2014-05-22 21:10:16 +00:00
parent 6314cbc84d
commit ccd49a5b8a
1 changed files with 28 additions and 4 deletions
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32
reactos/lib/sdk/crt/stdio/file.c
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@ -3824,15 +3824,39 @@ int CDECL ungetc(int c, FILE * file)
wint_t CDECL ungetwc(wint_t wc, FILE * file) wint_t CDECL ungetwc(wint_t wc, FILE * file)
{ {
wchar_t mwc = wc; wchar_t mwc = wc;
char * pp = (char *)&mwc;
int i; if (wc == WEOF)
return WEOF;
_lock_file(file); _lock_file(file);
for(i=sizeof(wchar_t)-1;i>=0;i--) {
if(pp[i] != ungetc(pp[i],file)) { if((get_ioinfo(file->_file)->exflag & (EF_UTF8 | EF_UTF16))
|| !(get_ioinfo(file->_file)->wxflag & WX_TEXT)) {
unsigned char * pp = (unsigned char *)&mwc;
int i;
for(i=sizeof(wchar_t)-1;i>=0;i--) {
if(pp[i] != ungetc(pp[i],file)) {
_unlock_file(file);
return WEOF;
}
}
}else {
char mbs[MB_LEN_MAX];
int len;
len = wctomb(mbs, mwc);
if(len == -1) {
_unlock_file(file); _unlock_file(file);
return WEOF; return WEOF;
} }
for(len--; len>=0; len--) {
if(mbs[len] != ungetc(mbs[len], file)) {
_unlock_file(file);
return WEOF;
}
}
} }
_unlock_file(file); _unlock_file(file);