1 files changed, 30 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libstdio/fgetc_unlocked.c b/mdk-stage1/dietlibc/libstdio/fgetc_unlocked.c
new file mode 100644
index 000000000..5136c8df1
--- /dev/null
+++ b/mdk-stage1/dietlibc/libstdio/fgetc_unlocked.c
@@ -0,0 +1,30 @@
+#include "dietstdio.h"
+#include <unistd.h>
+
+int fgetc_unlocked(FILE *stream) {
+  unsigned char c;
+  if (stream->ungotten) {
+    stream->ungotten=0;
+    return stream->ungetbuf;
+  }
+  if (feof(stream))
+    return EOF;
+  if (__fflush4(stream,BUFINPUT)) return EOF;
+  if (stream->bm>=stream->bs) {
+    int len=read(stream->fd,stream->buf,stream->buflen);
+    if (len==0) {
+      stream->flags|=EOFINDICATOR;
+      return EOF;
+    } else if (len<0) {
+      stream->flags|=ERRORINDICATOR;
+      return EOF;
+    }
+    stream->bm=0;
+    stream->bs=len;
+  }
+  c=stream->buf[stream->bm];
+  ++stream->bm;
+  return c;
+}
+
+int fgetc(FILE* stream) __attribute__((weak,alias("fgetc_unlocked")));