[692] | 1 | #ifndef ZZIP_INTERNAL_DIRENT_H |
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| 2 | #define ZZIP_INTERNAL_DIRENT_H |
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| 3 | #include <zzip/conf.h> |
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| 4 | |
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| 5 | /* |
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| 6 | * DO NOT USE THIS CODE. |
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| 7 | * |
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| 8 | * It is an internal header file for zziplib that carries some inline |
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| 9 | * functions (or just static members) and a few defines, simply to be |
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| 10 | * able to reuse these across - and have everything in a specific place. |
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| 11 | * |
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| 12 | * Copyright (c) 2002,2003 Guido Draheim |
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| 13 | * All rights reserved, |
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| 14 | * use under the restrictions of the |
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| 15 | * Lesser GNU General Public License |
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| 16 | * or alternatively the restrictions |
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| 17 | * of the Mozilla Public License 1.1 |
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| 18 | */ |
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| 19 | |
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| 20 | #ifdef ZZIP_HAVE_DIRENT_H |
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| 21 | #define USE_DIRENT 1 |
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| 22 | |
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| 23 | #define _zzip_opendir opendir |
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| 24 | #define _zzip_readdir readdir |
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| 25 | #define _zzip_closedir closedir |
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| 26 | #define _zzip_rewinddir rewinddir |
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| 27 | #define _zzip_telldir telldir |
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| 28 | #define _zzip_seekdir seekdir |
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| 29 | #define _zzip_DIR DIR |
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| 30 | |
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| 31 | #include <dirent.h> |
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| 32 | |
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| 33 | #elif defined ZZIP_HAVE_WINBASE_H |
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| 34 | #define USE_DIRENT 2 |
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| 35 | |
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| 36 | #define _zzip_opendir win32_opendir |
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| 37 | #define _zzip_readdir win32_readdir |
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| 38 | #define _zzip_closedir win32_closedir |
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| 39 | #define _zzip_rewinddir win32_rewinddir |
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| 40 | #define _zzip_telldir win32_telldir |
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| 41 | #define _zzip_seekdir win32_seekdir |
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| 42 | #define _zzip_DIR DIR |
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| 43 | |
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| 44 | /* |
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| 45 | * DIRENT.H (formerly DIRLIB.H) |
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| 46 | * |
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| 47 | * by M. J. Weinstein Released to public domain 1-Jan-89 |
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| 48 | * |
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| 49 | * Because I have heard that this feature (opendir, readdir, closedir) |
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| 50 | * it so useful for programmers coming from UNIX or attempting to port |
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| 51 | * UNIX code, and because it is reasonably light weight, I have included |
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| 52 | * it in the Mingw32 package. I have also added an implementation of |
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| 53 | * rewinddir, seekdir and telldir. |
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| 54 | * - Colin Peters <colin@bird.fu.is.saga-u.ac.jp> |
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| 55 | * |
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| 56 | * This code is distributed in the hope that is will be useful but |
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| 57 | * WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY |
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| 58 | * DISCLAMED. This includeds but is not limited to warranties of |
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| 59 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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| 60 | * |
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| 61 | */ |
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| 62 | |
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| 63 | #include <io.h> |
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| 64 | |
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| 65 | struct dirent |
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| 66 | { |
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| 67 | long d_ino; /* Always zero. */ |
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| 68 | unsigned short d_reclen; /* Always zero. */ |
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| 69 | unsigned short d_namlen; /* Length of name in d_name. */ |
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| 70 | char* d_name; /* File name. */ |
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| 71 | /* NOTE: The name in the dirent structure points to the name in the |
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| 72 | * finddata_t structure in the DIR. */ |
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| 73 | }; |
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| 74 | |
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| 75 | /* |
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| 76 | * This is an internal data structure. Good programmers will not use it |
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| 77 | * except as an argument to one of the functions below. |
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| 78 | */ |
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| 79 | typedef struct |
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| 80 | { |
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| 81 | /* disk transfer area for this dir */ |
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| 82 | struct _finddata_t dd_dta; |
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| 83 | |
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| 84 | /* dirent struct to return from dir (NOTE: this makes this thread |
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| 85 | * safe as long as only one thread uses a particular DIR struct at |
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| 86 | * a time) */ |
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| 87 | struct dirent dd_dir; |
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| 88 | |
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| 89 | /* _findnext handle */ |
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| 90 | long dd_handle; |
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| 91 | |
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| 92 | /* |
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| 93 | * Status of search: |
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| 94 | * 0 = not started yet (next entry to read is first entry) |
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| 95 | * -1 = off the end |
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| 96 | * positive = 0 based index of next entry |
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| 97 | */ |
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| 98 | short dd_stat; |
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| 99 | |
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| 100 | /* given path for dir with search pattern (struct is extended) */ |
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| 101 | char dd_name[1]; |
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| 102 | } DIR; |
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| 103 | |
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| 104 | /* |
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| 105 | * dirent.c |
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| 106 | * |
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| 107 | * Derived from DIRLIB.C by Matt J. Weinstein |
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| 108 | * This note appears in the DIRLIB.H |
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| 109 | * DIRLIB.H by M. J. Weinstein Released to public domain 1-Jan-89 |
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| 110 | * |
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| 111 | * Updated by Jeremy Bettis <jeremy@hksys.com> |
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| 112 | * Significantly revised and rewinddir, seekdir and telldir added by Colin |
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| 113 | * Peters <colin@fu.is.saga-u.ac.jp> |
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| 114 | */ |
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| 115 | |
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| 116 | #include <direct.h> |
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| 117 | #include <errno.h> |
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| 118 | #include <io.h> |
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| 119 | #include <stdlib.h> |
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| 120 | #include <string.h> |
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| 121 | #include <sys/stat.h> |
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| 122 | |
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| 123 | #define win32_SUFFIX "*" |
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| 124 | #define win32_SLASH "\\" |
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| 125 | |
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| 126 | #ifndef S_ISDIR |
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| 127 | #define S_ISDIR(m) ((m & S_IFMT) == S_IFDIR) /* is a directory */ |
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| 128 | #endif S_ISDIR |
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| 129 | |
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| 130 | |
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| 131 | /* |
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| 132 | opendir |
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| 133 | |
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| 134 | Returns a pointer to a DIR structure appropriately filled in to begin |
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| 135 | searching a directory. |
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| 136 | */ |
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| 137 | static DIR* |
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| 138 | win32_opendir (const char *szPath) |
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| 139 | { |
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| 140 | DIR *nd; |
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| 141 | struct _stat statDir; |
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| 142 | |
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| 143 | errno = 0; |
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| 144 | |
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| 145 | if (!szPath) { |
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| 146 | errno = EFAULT; |
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| 147 | return (DIR *) 0; |
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| 148 | } |
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| 149 | |
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| 150 | if (szPath[0] == '\0') { |
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| 151 | errno = ENOTDIR; |
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| 152 | return (DIR *) 0; |
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| 153 | } |
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| 154 | |
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| 155 | /* Attempt to determine if the given path really is a directory. */ |
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| 156 | if (_stat (szPath, &statDir)) { |
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| 157 | /* Error, stat should have set an error value. */ |
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| 158 | return (DIR *) 0; |
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| 159 | } |
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| 160 | |
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| 161 | if (!S_ISDIR (statDir.st_mode)) { |
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| 162 | /* Error, stat reports not a directory. */ |
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| 163 | errno = ENOTDIR; |
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| 164 | return (DIR *) 0; |
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| 165 | } |
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| 166 | |
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| 167 | /* Allocate enough space to store DIR structure and the complete * |
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| 168 | directory path given. */ |
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| 169 | nd = (DIR *) calloc (1, sizeof (DIR) + strlen (szPath) |
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| 170 | + strlen (win32_SLASH) + strlen (win32_SUFFIX)); |
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| 171 | |
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| 172 | if (!nd) { |
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| 173 | /* Error, out of memory. */ |
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| 174 | errno = ENOMEM; |
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| 175 | return (DIR *) 0; |
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| 176 | } |
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| 177 | |
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| 178 | /* Create the search expression. */ |
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| 179 | strcpy (nd->dd_name, szPath); |
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| 180 | |
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| 181 | /* Add on a slash if the path does not end with one. */ |
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| 182 | if (nd->dd_name[0] != '\0' && |
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| 183 | nd->dd_name[strlen (nd->dd_name) - 1] != '/' && |
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| 184 | nd->dd_name[strlen (nd->dd_name) - 1] != '\\') { |
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| 185 | strcat (nd->dd_name, win32_SLASH); |
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| 186 | } |
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| 187 | |
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| 188 | /* Add on the search pattern */ |
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| 189 | strcat (nd->dd_name, win32_SUFFIX); |
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| 190 | |
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| 191 | /* Initialize handle to -1 so that a premature closedir doesn't try * to |
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| 192 | call _findclose on it. */ |
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| 193 | nd->dd_handle = -1; |
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| 194 | |
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| 195 | /* Initialize the status. */ |
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| 196 | nd->dd_stat = 0; |
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| 197 | |
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| 198 | /* Initialize the dirent structure. ino and reclen are invalid under * |
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| 199 | Win32, and name simply points at the appropriate part of the * |
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| 200 | findfirst_t structure. */ |
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| 201 | nd->dd_dir.d_ino = 0; |
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| 202 | nd->dd_dir.d_reclen = 0; |
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| 203 | nd->dd_dir.d_namlen = 0; |
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| 204 | nd->dd_dir.d_name = nd->dd_dta.name; |
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| 205 | |
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| 206 | return nd; |
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| 207 | } |
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| 208 | |
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| 209 | /* |
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| 210 | readdir |
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| 211 | |
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| 212 | Return a pointer to a dirent structure filled with the information on the |
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| 213 | next entry in the directory. |
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| 214 | */ |
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| 215 | static struct dirent * |
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| 216 | win32_readdir (DIR * dirp) |
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| 217 | { |
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| 218 | errno = 0; |
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| 219 | |
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| 220 | /* Check for valid DIR struct. */ |
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| 221 | if (!dirp) { |
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| 222 | errno = EFAULT; |
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| 223 | return (struct dirent *) 0; |
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| 224 | } |
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| 225 | |
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| 226 | if (dirp->dd_dir.d_name != dirp->dd_dta.name) { |
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| 227 | /* The structure does not seem to be set up correctly. */ |
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| 228 | errno = EINVAL; |
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| 229 | return (struct dirent *) 0; |
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| 230 | } |
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| 231 | |
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| 232 | if (dirp->dd_stat < 0) { |
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| 233 | /* We have already returned all files in the directory * (or the |
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| 234 | structure has an invalid dd_stat). */ |
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| 235 | return (struct dirent *) 0; |
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| 236 | } else if (dirp->dd_stat == 0) { |
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| 237 | /* We haven't started the search yet. */ |
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| 238 | /* Start the search */ |
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| 239 | dirp->dd_handle = _findfirst (dirp->dd_name, &(dirp->dd_dta)); |
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| 240 | |
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| 241 | if (dirp->dd_handle == -1) { |
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| 242 | /* Whoops! Seems there are no files in that * directory. */ |
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| 243 | dirp->dd_stat = -1; |
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| 244 | } else { |
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| 245 | dirp->dd_stat = 1; |
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| 246 | } |
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| 247 | } else { |
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| 248 | /* Get the next search entry. */ |
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| 249 | if (_findnext (dirp->dd_handle, &(dirp->dd_dta))) { |
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| 250 | /* We are off the end or otherwise error. */ |
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| 251 | _findclose (dirp->dd_handle); |
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| 252 | dirp->dd_handle = -1; |
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| 253 | dirp->dd_stat = -1; |
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| 254 | } else { |
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| 255 | /* Update the status to indicate the correct * number. */ |
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| 256 | dirp->dd_stat++; |
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| 257 | } |
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| 258 | } |
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| 259 | |
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| 260 | if (dirp->dd_stat > 0) { |
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| 261 | /* Successfully got an entry. Everything about the file is * already |
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| 262 | appropriately filled in except the length of the * file name. */ |
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| 263 | dirp->dd_dir.d_namlen = (unsigned short) strlen (dirp->dd_dir.d_name); |
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| 264 | return &dirp->dd_dir; |
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| 265 | } |
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| 266 | |
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| 267 | return (struct dirent *) 0; |
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| 268 | } |
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| 269 | |
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| 270 | /* |
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| 271 | closedir |
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| 272 | |
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| 273 | Frees up resources allocated by opendir. |
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| 274 | */ |
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| 275 | static int |
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| 276 | win32_closedir (DIR * dirp) |
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| 277 | { |
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| 278 | int rc; |
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| 279 | |
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| 280 | errno = 0; |
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| 281 | rc = 0; |
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| 282 | |
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| 283 | if (!dirp) { |
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| 284 | errno = EFAULT; |
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| 285 | return -1; |
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| 286 | } |
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| 287 | |
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| 288 | if (dirp->dd_handle != -1) { |
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| 289 | rc = _findclose (dirp->dd_handle); |
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| 290 | } |
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| 291 | |
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| 292 | /* Delete the dir structure. */ |
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| 293 | free (dirp); |
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| 294 | |
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| 295 | return rc; |
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| 296 | } |
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| 297 | |
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| 298 | /* |
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| 299 | rewinddir |
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| 300 | |
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| 301 | Return to the beginning of the directory "stream". We simply call findclose |
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| 302 | and then reset things like an opendir. |
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| 303 | */ |
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| 304 | static void |
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| 305 | win32_rewinddir (DIR * dirp) |
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| 306 | { |
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| 307 | errno = 0; |
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| 308 | |
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| 309 | if (!dirp) { |
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| 310 | errno = EFAULT; |
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| 311 | return; |
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| 312 | } |
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| 313 | |
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| 314 | if (dirp->dd_handle != -1) { |
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| 315 | _findclose (dirp->dd_handle); |
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| 316 | } |
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| 317 | |
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| 318 | dirp->dd_handle = -1; |
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| 319 | dirp->dd_stat = 0; |
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| 320 | } |
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| 321 | |
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| 322 | /* |
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| 323 | telldir |
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| 324 | |
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| 325 | Returns the "position" in the "directory stream" which can be used with |
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| 326 | seekdir to go back to an old entry. We simply return the value in stat. |
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| 327 | */ |
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| 328 | static long |
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| 329 | win32_telldir (DIR * dirp) |
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| 330 | { |
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| 331 | errno = 0; |
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| 332 | |
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| 333 | if (!dirp) { |
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| 334 | errno = EFAULT; |
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| 335 | return -1; |
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| 336 | } |
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| 337 | return dirp->dd_stat; |
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| 338 | } |
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| 339 | |
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| 340 | /* |
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| 341 | seekdir |
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| 342 | |
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| 343 | Seek to an entry previously returned by telldir. We rewind the directory |
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| 344 | and call readdir repeatedly until either dd_stat is the position number |
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| 345 | or -1 (off the end). This is not perfect, in that the directory may |
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| 346 | have changed while we weren't looking. But that is probably the case with |
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| 347 | any such system. |
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| 348 | */ |
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| 349 | static void |
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| 350 | win32_seekdir (DIR * dirp, long lPos) |
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| 351 | { |
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| 352 | errno = 0; |
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| 353 | |
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| 354 | if (!dirp) { |
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| 355 | errno = EFAULT; |
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| 356 | return; |
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| 357 | } |
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| 358 | |
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| 359 | if (lPos < -1) { |
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| 360 | /* Seeking to an invalid position. */ |
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| 361 | errno = EINVAL; |
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| 362 | return; |
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| 363 | } else if (lPos == -1) { |
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| 364 | /* Seek past end. */ |
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| 365 | if (dirp->dd_handle != -1) { |
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| 366 | _findclose (dirp->dd_handle); |
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| 367 | } |
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| 368 | dirp->dd_handle = -1; |
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| 369 | dirp->dd_stat = -1; |
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| 370 | } else { |
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| 371 | /* Rewind and read forward to the appropriate index. */ |
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| 372 | win32_rewinddir (dirp); |
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| 373 | |
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| 374 | while ((dirp->dd_stat < lPos) && win32_readdir (dirp)); |
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| 375 | } |
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| 376 | } |
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| 377 | |
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| 378 | #else |
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| 379 | #define USE_DIRENT 0 |
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| 380 | |
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| 381 | #define _zzip_opendir(_N_) 0 |
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| 382 | #define _zzip_readdir(_D_) 0 |
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| 383 | #define _zzip_closedir(_D_) /* omit return code */ |
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| 384 | #define _zzip_rewinddir(_D_) |
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| 385 | #define _zzip_telldir(_D_) 0 |
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| 386 | #define _zzip_seekdir(_D_,_V_) /* omit return code */ |
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| 387 | #define _zzip_DIR void* |
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| 388 | |
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| 389 | /* end of DIRENT implementation */ |
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| 390 | #endif |
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| 391 | |
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| 392 | /* once */ |
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| 393 | #endif |
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