msvcrt: Added _ungetc_nolock implementation.

dlls/msvcr100/msvcr100.spec

@@ -1405,7 +1405,7 @@
 @ cdecl _ultow_s(long ptr long long) MSVCRT__ultow_s
 @ cdecl _umask(long) MSVCRT__umask
 @ stub _umask_s
-@ stub _ungetc_nolock
+@ cdecl _ungetc_nolock(long ptr) MSVCRT__ungetc_nolock
 @ cdecl _ungetch(long)
 @ stub _ungetch_nolock
 @ stub _ungetwc_nolock

dlls/msvcr110/msvcr110.spec

@@ -1763,7 +1763,7 @@
 @ cdecl _ultow_s(long ptr long long) MSVCRT__ultow_s
 @ cdecl _umask(long) MSVCRT__umask
 @ stub _umask_s
-@ stub _ungetc_nolock
+@ cdecl _ungetc_nolock(long ptr) MSVCRT__ungetc_nolock
 @ cdecl _ungetch(long)
 @ stub _ungetch_nolock
 @ stub _ungetwc_nolock

dlls/msvcr120/msvcr120.spec

@@ -1777,7 +1777,7 @@
 @ cdecl _ultow_s(long ptr long long) MSVCRT__ultow_s
 @ cdecl _umask(long) MSVCRT__umask
 @ stub _umask_s
-@ stub _ungetc_nolock
+@ cdecl _ungetc_nolock(long ptr) MSVCRT__ungetc_nolock
 @ cdecl _ungetch(long)
 @ stub _ungetch_nolock
 @ stub _ungetwc_nolock

dlls/msvcr80/msvcr80.spec

@@ -1084,7 +1084,7 @@
 @ cdecl _ultow_s(long ptr long long) MSVCRT__ultow_s
 @ cdecl _umask(long) MSVCRT__umask
 @ stub _umask_s
-@ stub _ungetc_nolock
+@ cdecl _ungetc_nolock(long ptr) MSVCRT__ungetc_nolock
 @ cdecl _ungetch(long)
 @ stub _ungetch_nolock
 @ stub _ungetwc_nolock

dlls/msvcr90/msvcr90.spec

@@ -1060,7 +1060,7 @@
 @ cdecl _ultow_s(long ptr long long) MSVCRT__ultow_s
 @ cdecl _umask(long) MSVCRT__umask
 @ stub _umask_s
-@ stub _ungetc_nolock
+@ cdecl _ungetc_nolock(long ptr) MSVCRT__ungetc_nolock
 @ cdecl _ungetch(long)
 @ stub _ungetch_nolock
 @ stub _ungetwc_nolock

dlls/msvcrt/file.c

@@ -5002,13 +5002,28 @@ int CDECL MSVCRT_printf_s(const char *format, ...)
  */
 int CDECL MSVCRT_ungetc(int c, MSVCRT_FILE * file)
 {
+    int ret;
+
+    if(!MSVCRT_CHECK_PMT(file != NULL)) return MSVCRT_EOF;
+
+    MSVCRT__lock_file(file);
+    ret = MSVCRT__ungetc_nolock(c, file);
+    MSVCRT__unlock_file(file);
+
+    return ret;
+}
+
+/*********************************************************************
+ *		_ungetc_nolock (MSVCRT.@)
+ */
+int CDECL MSVCRT__ungetc_nolock(int c, MSVCRT_FILE * file)
+{
     if(!MSVCRT_CHECK_PMT(file != NULL)) return MSVCRT_EOF;
 
     if (c == MSVCRT_EOF || !(file->_flag&MSVCRT__IOREAD ||
                 (file->_flag&MSVCRT__IORW && !(file->_flag&MSVCRT__IOWRT))))
         return MSVCRT_EOF;
 
-    MSVCRT__lock_file(file);
     if((!(file->_flag & (MSVCRT__IONBF | MSVCRT__IOMYBUF | MSVCRT__USERBUF))
                 && msvcrt_alloc_buffer(file))
             || (!file->_cnt && file->_ptr==file->_base))
@@ -5019,20 +5034,17 @@ int CDECL MSVCRT_ungetc(int c, MSVCRT_FILE * file)
         if(file->_flag & MSVCRT__IOSTRG) {
             if(*file->_ptr != c) {
                 file->_ptr++;
-                MSVCRT__unlock_file(file);
                 return MSVCRT_EOF;
             }
         }else {
             *file->_ptr = c;
         }
         file->_cnt++;
-        MSVCRT_clearerr(file);
+        file->_flag &= ~(MSVCRT__IOERR | MSVCRT__IOEOF);
         file->_flag |= MSVCRT__IOREAD;
-        MSVCRT__unlock_file(file);
         return c;
     }
 
-    MSVCRT__unlock_file(file);
     return MSVCRT_EOF;
 }
 

dlls/msvcrt/msvcrt.h

@@ -919,6 +919,7 @@ int __cdecl      MSVCRT_fgetc(MSVCRT_FILE*);
 int __cdecl      MSVCRT__fgetc_nolock(MSVCRT_FILE*);
 int __cdecl      MSVCRT__fputc_nolock(int,MSVCRT_FILE*);
 int __cdecl      MSVCRT_ungetc(int,MSVCRT_FILE*);
+int __cdecl      MSVCRT__ungetc_nolock(int,MSVCRT_FILE*);
 MSVCRT_wint_t __cdecl MSVCRT_fgetwc(MSVCRT_FILE*);
 MSVCRT_wint_t __cdecl MSVCRT__fgetwc_nolock(MSVCRT_FILE*);
 MSVCRT_wint_t __cdecl MSVCRT__fputwc_nolock(MSVCRT_wint_t,MSVCRT_FILE*);

include/msvcrt/stdio.h

@@ -137,6 +137,7 @@ int    __cdecl _fseek_nolock(FILE*,__msvcrt_long,int);
 int    __cdecl _fseeki64_nolock(FILE*,__int64,int);
 __msvcrt_long __cdecl _ftell_nolock(FILE*);
 __int64 __cdecl _ftelli64_nolock(FILE*);
+int    __cdecl _ungetc_nolock(int,FILE*);
 
 void   __cdecl clearerr(FILE*);
 int    __cdecl fclose(FILE*);