fs_frename.c

keil arm flash fs 最新版 在Ｋｅｉｌ ａｒｍ下使用

/*----------------------------------------------------------------------------
 *      R T L  -  F l a s h   F i l e   S y s t e m
 *----------------------------------------------------------------------------
 *      Name:    FS_FRENAME.C 
 *      Purpose: File Rename Function
 *      Rev.:    V3.22
 *----------------------------------------------------------------------------
 *      This code is part of the RealView Run-Time Library.
 *      Copyright (c) 2004-2008 KEIL - An ARM Company. All rights reserved.
 *---------------------------------------------------------------------------*/

#include <string.h>                   /* string and memory functions         */
#include "File_Config.h"

/*--------------------------- frename ---------------------------------------*/

int frename (const char *oldname, const char *newname) {
   /* Rename a file from 'oldname' to 'newname'. */
   IOB *fcb;
   int handle;
   int drv2;
   int i;
   char newname_w_path[81];

   /* Find an unused _iob structure. */
   if ((handle = fs_find_iob ()) == EOF) {
      return (1);
   }
   fcb = &_iob[handle];
   fcb->drive = fs_get_drive (oldname);
   if (fcb->drive != DRV_NONE) {
      /* Skip drive letter 'X:' */
      oldname += 2;
   }
   else {
      fcb->drive = _DEF_DRIVE;
   }
   drv2 = fs_get_drive (newname);
   if (drv2 != DRV_NONE) {
      newname += 2;
      if (drv2 != fcb->drive) {
         /* If provided, both drives must be the same. */
         return (1);
      }
   }
   if (fcb->drive == DRV_MCARD) {
      /* Find path part of old name. */
      for (i = (strlen(oldname) - 1); i >= 0; i --) {
         if (oldname[i] == '\\') {
            break;
         }
      }
      if (i) {
         /* If path exists, add path to new name to search if it exists. */
         memcpy(newname_w_path, oldname, i + 1);
         newname_w_path[i+1] = 0;
         strcat(newname_w_path, newname);
      }  else {
         memcpy(newname_w_path, newname, strlen(newname));
      }

      /* Rename a file located on Flash Memory Card. */
      if (fat_find_file (newname_w_path, fcb) == __TRUE) {
         /* File with 'newname' already exists */
         return (1);
      }
      if (fat_rename (oldname, newname, fcb) == __TRUE) {
         return (0);
      }
      return (1);
   }
   /* Set drive parameters. */
   if (fs_set_params (fcb) == __FALSE) {
      return (1);
   }

   if (fs_Find_File (newname, fcb) == 0) {
      /* File with 'newname' already exists */
      return (1);
   }
   if (fs_Find_File (oldname, fcb) == 0) {
      return (_frename (newname, fcb));
   }
   /* File with 'oldname' not found */
   return (1);
}

/*----------------------------------------------------------------------------
 * end of file
 *---------------------------------------------------------------------------*/