tools/tesh2/w32/src/dirent.c

   1 \r
   2 #include <sys/stat.h>\r
   3 #include <stdio.h>\r
   4 #include <dirent.h>\r
   5 #include <errno.h>\r
   6 \r
   7 \r
   8 DIR*\r
   9 opendir(const char* directory_name)\r
  10 {\r
  11         struct stat sb;\r
  12         DIR* dir;\r
  13 \r
  14         if(NULL == directory_name) \r
  15         {\r
  16                 errno = EINVAL;\r
  17                 return NULL;\r
  18         }\r
  19         \r
  20         if(0 != stat(directory_name, &sb)) \r
  21         {\r
  22                 /* directory not found */\r
  23                 errno = ENOENT;\r
  24                 return NULL;\r
  25         }\r
  26         \r
  27         if(0 == S_ISDIR(sb.st_mode)) \r
  28         {\r
  29                 /* it's not a directory */\r
  30                 errno = ENOTDIR;\r
  31                 return NULL;\r
  32         }\r
  33 \r
  34         \r
  35         dir = (DIR *)calloc(1,sizeof(DIR));\r
  36 \r
  37         if (NULL == dir)\r
  38         {\r
  39                 errno = ENOMEM;\r
  40                 return NULL;\r
  41         }\r
  42 \r
  43         if('\\' != dir->directory_name[strlen(directory_name) - 1])\r
  44                 sprintf(dir->directory_name,"%s\\*",directory_name);\r
  45         else\r
  46                 sprintf(dir->directory_name,"%s*",directory_name);\r
  47 \r
  48         dir->file_handle = INVALID_HANDLE_VALUE;\r
  49 \r
  50         return dir;\r
  51 }\r
  52 \r
  53 int\r
  54 closedir(DIR* dir)\r
  55 {\r
  56         if(NULL == dir) \r
  57                 return EINVAL;\r
  58         \r
  59         if(INVALID_HANDLE_VALUE != dir->file_handle)\r
  60                 FindClose(dir->file_handle);\r
  61         else\r
  62                 return EBADF;\r
  63         \r
  64         free(dir);\r
  65 \r
  66         return 0;\r
  67 \r
  68 }\r
  69 \r
  70 struct dirent*\r
  71 readdir(DIR* dir)\r
  72 {\r
  73         WIN32_FIND_DATA wfd = {0};\r
  74 \r
  75         if(!dir) \r
  76         {\r
  77                 errno = EINVAL;\r
  78                 return NULL;\r
  79         }\r
  80 \r
  81         if(!dir->pos) \r
  82                 dir->file_handle = FindFirstFile(dir->directory_name, &wfd);\r
  83         \r
  84         if(!FindNextFile(dir->file_handle, &wfd))\r
  85                 return NULL;\r
  86                         \r
  87         dir->pos++;\r
  88 \r
  89         strcpy(dir->entry.d_name, wfd.cFileName);\r
  90 \r
  91         return &(dir->entry);\r
  92 }\r
  93 \r
  94 void\r
  95 rewinddir(DIR* dir)\r
  96 {\r
  97         if(NULL == dir) \r
  98         {\r
  99                 errno = EINVAL;\r
 100                 return;\r
 101         }\r
 102 \r
 103         if(INVALID_HANDLE_VALUE != dir->file_handle)\r
 104         {\r
 105                 FindClose(dir->file_handle);\r
 106                 dir->file_handle = INVALID_HANDLE_VALUE;\r
 107                 dir->pos = 0;\r
 108         }\r
 109 }\r
 110 \r
 111 off_t\r
 112 telldir(DIR* dir)\r
 113 {\r
 114         if(NULL == dir) \r
 115         {\r
 116                 errno = EINVAL;\r
 117                 return -1;\r
 118         }\r
 119         \r
 120         return dir->pos;\r
 121 }\r
 122 \r
 123 void\r
 124 seekdir(DIR* dir, off_t offset)\r
 125 {\r
 126         WIN32_FIND_DATA wfd = {0};\r
 127         \r
 128         if(NULL == dir)\r
 129         {\r
 130                 errno = EINVAL;\r
 131                 return;\r
 132         }\r
 133 \r
 134         if(INVALID_HANDLE_VALUE != dir->file_handle)\r
 135         {\r
 136                 FindClose(dir->file_handle);\r
 137                 dir->file_handle = INVALID_HANDLE_VALUE;\r
 138                 dir->pos = 0;\r
 139         }\r
 140         \r
 141         dir->file_handle = FindFirstFile(dir->directory_name, &wfd);\r
 142         \r
 143         dir->pos += offset;\r
 144         \r
 145         while(--offset)\r
 146         {\r
 147                 if(!FindNextFile(dir->file_handle, &wfd))\r
 148                         errno = EINVAL;\r
 149         }\r
 150 }\r