Create a branch for header work.

svn path=/branches/header-work/; revision=45691

lib/sdk/crt/stdlib/errno.c

@@ -0,0 +1,116 @@
+/*
+ * COPYRIGHT:   See COPYING in the top level directory
+ * PROJECT:     ReactOS system libraries
+ * FILE:        lib/crt/errno.c
+ * PURPOSE:     Unknown
+ * PROGRAMER:   Unknown
+ *
+ */
+#include <precomp.h>
+#include "doserrmap.h"
+#include <internal/wine/msvcrt.h>
+
+/*
+ * @implemented
+ */
+unsigned long* __doserrno(void)
+{
+  return (unsigned long*)(&GetThreadData()->tdoserrno);
+}
+
+/*
+ * @implemented
+ */
+int *_errno(void)
+{
+  return(&GetThreadData()->terrno);
+}
+
+
+int __set_doserrno(int error)
+{
+  PTHREADDATA ThreadData;
+
+  ThreadData = GetThreadData();
+  if (ThreadData)
+    ThreadData->tdoserrno = error;
+
+  return(error);
+}
+
+int __set_errno(int error)
+{
+  PTHREADDATA ThreadData;
+
+  ThreadData = GetThreadData();
+  if (ThreadData)
+    ThreadData->terrno = error;
+
+  return(error);
+}
+
+/*
+ * This function sets both doserrno to the passed in OS error code
+ * and also maps this to an appropriate errno code.  The mapping
+ * has been deduced automagically by running this functions, which
+ * exists in MSVCRT but is undocumented, on all the error codes in
+ * winerror.h.
+ */
+void _dosmaperr(unsigned long oserror)
+{
+	int pos, base, lim;
+
+	__set_doserrno(oserror);
+
+	/* Use binary chop to find the corresponding errno code */
+	for (base=0, lim=sizeof(doserrmap)/sizeof(doserrmap[0]); lim; lim >>= 1) {
+		pos = base+(lim >> 1);
+		if (doserrmap[pos].winerr == oserror) {
+			__set_errno(doserrmap[pos].en);
+			return;
+		} else if (doserrmap[pos].winerr < oserror) {
+			base = pos + 1;
+			--lim;
+		}
+	}
+	/* EINVAL appears to be the default */
+	__set_errno(EINVAL);
+}
+
+/******************************************************************************
+*              _set_error_mode (MSVCRT.@)
+*
+* Set the error mode, which describes where the C run-time writes error
+* messages.
+*
+* PARAMS
+*   mode - the new error mode
+*
+* RETURNS
+*   The old error mode.
+*
+* TODO
+*  This function does not have a proper implementation; the error mode is
+*  never used.
+*/
+int CDECL _set_error_mode(int mode)
+{
+    static int current_mode = MSVCRT__OUT_TO_DEFAULT;
+
+    const int old = current_mode;
+    if ( MSVCRT__REPORT_ERRMODE != mode ) {
+        current_mode = mode;
+
+    }
+    return old;
+}
+
+/******************************************************************************
+*              _seterrormode (MSVCRT.@)
+*/
+void CDECL _seterrormode(int mode)
+{
+    SetErrorMode( mode );
+}
+
+/* EOF */