[PATCH] Add _REENT_INIT_PTR_ZEROED()

[Sebastian Huber]

Provide a _REENT_INIT_PTR_ZEROED() macro to initialize an already
zero-initialized struct _reent.

	* libc/include/sys/reent.h (_REENT_INIT_PTR_ZEROED): New.
	(_REENT_INIT_PTR): Define only once and use
	_REENT_INIT_PTR_ZEROED().
---
 newlib/libc/include/sys/reent.h | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/newlib/libc/include/sys/reent.h b/newlib/libc/include/sys/reent.h
index ce5b3ed..5481ca2 100644
--- a/newlib/libc/include/sys/reent.h
+++ b/newlib/libc/include/sys/reent.h
@@ -446,9 +446,8 @@ extern const struct __sFILE_fake __sf_fake_stderr;
     _NULL \
   }
 
-#define _REENT_INIT_PTR(var) \
-  { memset((var), 0, sizeof(*(var))); \
-    (var)->_stdin = (__FILE *)&__sf_fake_stdin; \
+#define _REENT_INIT_PTR_ZEROED(var) \
+  { (var)->_stdin = (__FILE *)&__sf_fake_stdin; \
     (var)->_stdout = (__FILE *)&__sf_fake_stdout; \
     (var)->_stderr = (__FILE *)&__sf_fake_stderr; \
     (var)->_current_locale = "C"; \
@@ -694,9 +693,8 @@ struct _reent
     {_NULL, 0, _NULL} \
   }
 
-#define _REENT_INIT_PTR(var) \
-  { memset((var), 0, sizeof(*(var))); \
-    (var)->_stdin = &(var)->__sf[0]; \
+#define _REENT_INIT_PTR_ZEROED(var) \
+  { (var)->_stdin = &(var)->__sf[0]; \
     (var)->_stdout = &(var)->__sf[1]; \
     (var)->_stderr = &(var)->__sf[2]; \
     (var)->_current_locale = "C"; \
@@ -745,6 +743,11 @@ struct _reent
 
 #endif /* !_REENT_SMALL */
 
+#define _REENT_INIT_PTR(var) \
+  { memset((var), 0, sizeof(*(var))); \
+    _REENT_INIT_PTR_ZEROED(var); \
+  }
+
 /* This value is used in stdlib/misc.c.  reent/reent.c has to know it
    as well to make sure the freelist is correctly free'd.  Therefore
    we define it here, rather than in stdlib/misc.c, as before. */
-- 
1.8.4.5