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FX_DFEF.C
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FX_DFEF.C：Code Content
  1. /**************************************************************************/ 
  2. /*                                                                        */ 
  3. /*            Copyright (c) 1996-2002 by Express Logic Inc.               */ 
  4. /*                                                                        */ 
  5. /*  This software is copyrighted by and is the sole property of Express   */ 
  6. /*  Logic, Inc.  All rights, title, ownership, or other interests         */ 
  7. /*  in the software remain the property of Express Logic, Inc.  This      */ 
  8. /*  software may only be used in accordance with the corresponding        */ 
  9. /*  license agreement.  Any unauthorized use, duplication, transmission,  */ 
  10. /*  distribution, or disclosure of this software is expressly forbidden.  */ 
  11. /*                                                                        */
  12. /*  This Copyright notice may not be removed or modified without prior    */ 
  13. /*  written consent of Express Logic, Inc.                                */ 
  14. /*                                                                        */ 
  15. /*  Express Logic, Inc. reserves the right to modify this software        */ 
  16. /*  without notice.                                                       */ 
  17. /*                                                                        */ 
  18. /*  Express Logic, Inc.                     info@expresslogic.com         */
  19. /*  11423 West Bernardo Court               http://www.expresslogic.com   */
  20. /*  San Diego, CA  92127                                                  */
  21. /*                                                                        */
  22. /**************************************************************************/
  25. /**************************************************************************/
  26. /**************************************************************************/
  27. /**                                                                       */ 
  28. /** FileX Component                                                       */ 
  29. /**                                                                       */
  30. /**   Directory (DIR)                                                     */
  31. /**                                                                       */
  32. /**************************************************************************/
  33. /**************************************************************************/
  35. #include "Config.h" // Global Configuration - do not remove!
  37. #ifdef ENABLE_FILEX
  39. #ifdef _DEBUG
  40. #undef IFTRACE
  41. #define IFTRACE if (gTraceFileSys)
  42. #include "DebugDbgMain.h"
  43. #endif //_DEBUG
  45. #define FX_SOURCE_CODE
  48. /* Include necessary system files.  */
  50. #include "PlaycoreFileSysFileXfx_api.h"
  51. #include "PlaycoreFileSysFileXfx_sys.h"
  52. #include "PlaycoreFileSysFileXfx_dir.h"
  53. #include "PlaycoreFileSysFileXfx_uti.h"
  55. #ifndef FX_NO_LOCAL_PATH
  56. extern TX_THREAD *_tx_thread_current_ptr;
  57. #endif
  59. /**************************************************************************/ 
  60. /*                                                                        */ 
  61. /*  FUNCTION                                               RELEASE        */ 
  62. /*                                                                        */ 
  63. /*    _fx_directory_first_entry_find                      PORTABLE C      */ 
  64. /*                                                           3.0          */ 
  65. /*  AUTHOR                                                                */ 
  66. /*                                                                        */ 
  67. /*    William E. Lamie, Express Logic, Inc.                               */ 
  68. /*                                                                        */ 
  69. /*  DESCRIPTION                                                           */ 
  70. /*                                                                        */ 
  71. /*    This function returns the first directory entry of the current      */ 
  72. /*    working directory.                                                  */ 
  73. /*                                                                        */ 
  74. /*  INPUT                                                                 */ 
  75. /*                                                                        */ 
  76. /*    media_ptr                             Media control block pointer   */ 
  77. /*    directory_name                        Destination for directory     */ 
  78. /*                                            name                        */ 
  79. /*                                                                        */ 
  80. /*  OUTPUT                                                                */ 
  81. /*                                                                        */ 
  82. /*    return status                                                       */ 
  83. /*                                                                        */ 
  84. /*  CALLS                                                                 */ 
  85. /*                                                                        */ 
  86. /*    _fx_directory_next_entry_find         Find next directory entry     */ 
  87. /*                                                                        */ 
  88. /*  CALLED BY                                                             */ 
  89. /*                                                                        */ 
  90. /*    FileX System Functions                                              */ 
  91. /*                                                                        */ 
  92. /*  RELEASE HISTORY                                                       */ 
  93. /*                                                                        */ 
  94. /*    DATE              NAME                      DESCRIPTION             */ 
  95. /*                                                                        */ 
  96. /*  01-01-1999     William E. Lamie         Initial Version 1.0           */ 
  97. /*  03-01-2000     William E. Lamie         Modified comment(s),          */ 
  98. /*                                            resulting in version 1.0b.  */ 
  99. /*  01-28-2001     William E. Lamie         Modified comment(s) and added */ 
  100. /*                                            logic to use internal path  */ 
  101. /*                                            or local path, resulting    */ 
  102. /*                                            in version 2.0.             */ 
  103. /*  03-01-2002     William E. Lamie         Modified comment(s),          */ 
  104. /*                                            resulting in version 3.0.   */ 
  105. /*                                                                        */ 
  106. /**************************************************************************/ 
  107. UINT  _fx_directory_first_entry_find(FX_MEDIA *media_ptr, CHAR *directory_name)
  108. {
  110. UINT            status;
  113.     /* Check the media to make sure it is open.  */
  114.     if (media_ptr -> fx_media_id != FX_MEDIA_ID)
  115.     {
  117.         /* Return the media not opened error.  */
  118.         return(FX_MEDIA_NOT_OPEN);
  119.     }
  121.     /* Protect against other threads accessing the media.  */
  122.     FX_PROTECT
  124.     /* Determine if a local path is in effect at this point.  */
  125. #ifndef FX_NO_LOCAL_PATH
  126.         if (_tx_thread_current_ptr -> tx_filex_ptr)
  127.         {
  129.             /* Yes, there is a local path.  Set the current entry to zero.  */
  130.             ((FX_PATH *) _tx_thread_current_ptr -> tx_filex_ptr) -> fx_path_current_entry =  0;
  131.         } 
  132.         else
  133.         {
  135.             /* Use global default directory.  Set the current entry to 0 in 
  136.                order to pickup the first entry.  */
  137.             media_ptr -> fx_media_default_path.fx_path_current_entry =  0;
  138.         }
  139. #else
  140.     
  141.     /* Set the current entry to 0 in order to pickup the first entry.  */
  142.     media_ptr -> fx_media_default_path.fx_path_current_entry =  0;
  143. #endif
  145.     /* Release media protection.  */
  146.     FX_UNPROTECT
  148.     /* Call the next directory entry to pickup the first entry.  */
  149.     status =  _fx_directory_next_entry_find(media_ptr, directory_name);
  151.     /* Return status to the caller.  */
  152.     return(status);
  153. }
  154. #endif