[libc] Adjust libc.

1. Move struct stat to libc_stat.h;
2. Defined a new FD_SET macros in libc_fdset.h.

2 files changed, 7 insertions, 64 deletions

diff --git a/components/dfs/include/dfs.h b/components/dfs/include/dfs.h
index b402be7950..91ef42ab56 100644
--- a/components/dfs/include/dfs.h
+++ b/components/dfs/include/dfs.h
@@ -80,15 +80,6 @@
 extern "C" {
 #endif
 
-struct stat
-{
-    struct rt_device* st_dev;
-    uint16_t st_mode;
-    uint32_t st_size;
-    time_t   st_mtime;
-    uint32_t st_blksize;
-};
-
 struct statfs
 {
     size_t f_bsize;   /* block size */
diff --git a/components/dfs/include/dfs_select.h b/components/dfs/include/dfs_select.h
index 0b5d6cef17..1c51b1df38 100644
--- a/components/dfs/include/dfs_select.h
+++ b/components/dfs/include/dfs_select.h
@@ -1,65 +1,17 @@
 #ifndef DFS_SELECT_H__
 #define DFS_SELECT_H__
 
-#ifdef RT_USING_LWIP
-/* we use lwIP's structure definitions. */
-#include <lwip/sockets.h>
-#elif defined(RT_USING_POSIX)
+#include <libc/libc_fdset.h>
 
-#ifndef FD_SET
-
-/* Get the total number of descriptors that we will have to support */
-
-#define FD_SETSIZE (12)
-
-/* We will use a 32-bit bitsets to represent the set of descriptors.  How
- * many uint32_t's do we need to span all descriptors?
- */
-
-#if FD_SETSIZE <= 32
-#  define __SELECT_NUINT32 1
-#elif FD_SETSIZE <= 64
-#  define __SELECT_NUINT32 2
-#elif FD_SETSIZE <= 96
-#  define __SELECT_NUINT32 3
-#elif FD_SETSIZE <= 128
-#  define __SELECT_NUINT32 4
-#elif FD_SETSIZE <= 160
-#  define __SELECT_NUINT32 5
-#elif FD_SETSIZE <= 192
-#  define __SELECT_NUINT32 6
-#elif FD_SETSIZE <= 224
-#  define __SELECT_NUINT32 7
-#elif FD_SETSIZE <= 256
-#  define __SELECT_NUINT32 8
-#else
-#  warning "Larger fd_set needed"
-#endif
-
-/* These macros map a file descriptor to an index and bit number */
-
-#define _FD_NDX(fd)    ((fd) >> 5)
-#define _FD_BIT(fd)      ((fd) & 0x1f)
-
-/* Standard helper macros */
-
-#define FD_CLR(fd,set) \
-  ((((fd_set*)(set))->arr)[_FD_NDX(fd)] &= ~(1 << _FD_BIT(fd)))
-#define FD_SET(fd,set) \
-  ((((fd_set*)(set))->arr)[_FD_NDX(fd)] |= (1 << _FD_BIT(fd)))
-#define FD_ISSET(fd,set) \
-  (((((fd_set*)(set))->arr)[_FD_NDX(fd)] & (1 << _FD_BIT(fd))) != 0)
-#define FD_ZERO(set) \
-   memset((set), 0, sizeof(fd_set))
-
-typedef struct
-{
-    uint32_t arr[__SELECT_NUINT32];
-}fd_set;
+#ifdef __cplusplus
+extern "C" {
 #endif
 
 int select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout);
 
-#endif  /* end of RT_USING_LWIP */
+#ifdef __cplusplus
+}
+#endif
 
 #endif
+