[gcc(refs/users/ibuclaw/heads/mingw)] Questionable fix (fgetwc is defined in C library, and this implementation does not really work with

[Iain Buclaw <ibuclaw@gcc.gnu.org>]

https://gcc.gnu.org/g:6724c01a716b8bf5efaf6a42148cc6f9ea6807f2

commit 6724c01a716b8bf5efaf6a42148cc6f9ea6807f2
Author: Iain Buclaw <ibuclaw@gdcproject.org>
Date:   Sun Apr 11 20:56:48 2021 +0200

    Questionable fix (fgetwc is defined in C library, and this implementation does not really work with wchar_t)

Diff:
---
 libphobos/libdruntime/core/stdc/stdio.d | 31 ++++++++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/libphobos/libdruntime/core/stdc/stdio.d b/libphobos/libdruntime/core/stdc/stdio.d
index 6cd7851f96c..dab5ba8d7b2 100644
--- a/libphobos/libdruntime/core/stdc/stdio.d
+++ b/libphobos/libdruntime/core/stdc/stdio.d
@@ -1486,6 +1486,35 @@ else version (CRuntime_Microsoft)
         else
             return _filbuf(fp);
     }
+    ///
+    int _fputwc_nolock(int c, FILE* fp)
+    {
+        pragma(inline, true);
+        fp._cnt = fp._cnt - 1;
+        if (fp._cnt >= 0)
+        {
+            immutable ch = cast(char)c;
+            *fp._ptr = ch;
+            fp._ptr = fp._ptr + 1;
+            return ch & 0xFF;
+        }
+        else
+            return _flsbuf(c, fp);
+    }
+    ///
+    int _fgetwc_nolock(FILE* fp)
+    {
+        pragma(inline, true);
+        fp._cnt = fp._cnt - 1;
+        if (fp._cnt >= 0)
+        {
+            immutable ch = *fp._ptr;
+            fp._ptr = fp._ptr + 1;
+            return ch & 0xFF;
+        }
+        else
+            return _filbuf(fp);
+    }
   }
   else
   {
@@ -1493,11 +1522,11 @@ else version (CRuntime_Microsoft)
     int _fputc_nolock(int c, FILE* fp);
     ///
     int _fgetc_nolock(FILE* fp);
-  }
     ///
     int _fputwc_nolock(int c, FILE* fp);
     ///
     int _fgetwc_nolock(FILE* fp);
+  }
     ///
     void _lock_file(FILE* fp);
     ///