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FX_DNT.C
资源名称：tb_i86_wr_1019_1102.　[点击查看]
上传用户：super_houu
上传日期：2008-09-21
资源大小：4099k
文件大小：8k
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DVD

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FX_DNT.C：源码内容
  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_fil.h"
  54. #include "PlaycoreFileSysFileXfx_uti.h"
  57. /**************************************************************************/ 
  58. /*                                                                        */ 
  59. /*  FUNCTION                                               RELEASE        */ 
  60. /*                                                                        */ 
  61. /*    _fx_directory_name_test                             PORTABLE C      */ 
  62. /*                                                           3.0          */ 
  63. /*  AUTHOR                                                                */ 
  64. /*                                                                        */ 
  65. /*    William E. Lamie, Express Logic, Inc.                               */ 
  66. /*                                                                        */ 
  67. /*  DESCRIPTION                                                           */ 
  68. /*                                                                        */ 
  69. /*    This function first attempts to find the specified directory name.  */ 
  70. /*    If found, the attributes are checked to see if the entry is a       */ 
  71. /*    directory.  If not, the appropriate error code is returned to the   */ 
  72. /*    caller.                                                             */ 
  73. /*                                                                        */ 
  74. /*  INPUT                                                                 */ 
  75. /*                                                                        */ 
  76. /*    media_ptr                             Media control block pointer   */ 
  77. /*    directory_name                        Directory name pointer        */ 
  78. /*                                                                        */ 
  79. /*  OUTPUT                                                                */ 
  80. /*                                                                        */ 
  81. /*    return status                                                       */ 
  82. /*                                                                        */ 
  83. /*  CALLS                                                                 */ 
  84. /*                                                                        */ 
  85. /*    _fx_directory_search                  Search for the file name in   */ 
  86. /*                                          the directory structure       */ 
  87. /*                                                                        */ 
  88. /*  CALLED BY                                                             */ 
  89. /*                                                                        */ 
  90. /*    Application Code                                                    */ 
  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),          */ 
  100. /*                                            resulting in version 2.0.   */ 
  101. /*  03-01-2002     William E. Lamie         Modified comment(s),          */ 
  102. /*                                            resulting in version 3.0.   */ 
  103. /*                                                                        */ 
  104. /**************************************************************************/ 
  105. UINT  _fx_directory_name_test(FX_MEDIA *media_ptr, CHAR *directory_name)
  106. {
  108. UINT            status;
  109. FX_DIR_ENTRY    dir_entry;
  112.     /* Check the media to make sure it is open.  */
  113.     if (media_ptr -> fx_media_id != FX_MEDIA_ID)
  114.     {
  116.         /* Return the media not opened error.  */
  117.         return(FX_MEDIA_NOT_OPEN);
  118.     }
  120.     /* Protect against other threads accessing the media.  */
  121.     FX_PROTECT
  123.     /* Search the system for the supplied directory name.  */
  124.     status =  _fx_directory_search(media_ptr, directory_name, &dir_entry, FX_NULL, FX_NULL);
  126.     /* Determine if the search was successful.  */
  127.     if (status != FX_SUCCESS)
  128.     {
  130.         /* Release media protection.  */
  131.         FX_UNPROTECT
  133.         /* Return the error code.  */
  134.         return(status);
  135.     }
  137.     /* Check to see if the entry is a directory.  */
  138.     if (!(dir_entry.fx_dir_entry_attributes & (UCHAR) FX_DIRECTORY))
  139.     {
  141.         /* Release media protection.  */
  142.         FX_UNPROTECT
  144.         /* Return the not a directory error code.  */
  145.         return(FX_NOT_DIRECTORY);
  146.     }
  148.     /* Release media protection.  */
  149.     FX_UNPROTECT
  151.     /* Directory name test is complete, return successful status.  */
  152.     return(FX_SUCCESS);
  153. }
  155. #endif