source: trunk/thirds/dirent-win32/dirent.c @ 1

Last change on this file since 1 was 1, checked in by djay, 10 years ago

Initial ZOO SVN Repository Import.

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1/*
2
3    Implementation of POSIX directory browsing functions and types for Win32.
4
5    Author:  Kevlin Henney (kevlin@acm.org, kevlin@curbralan.com)
6    History: Created March 1997. Updated June 2003.
7    Rights:  See end of file.
8
9*/
10
11#include <dirent.h>
12#include <errno.h>
13#include <io.h> /* _findfirst and _findnext set errno iff they return -1 */
14#include <stdlib.h>
15#include <string.h>
16
17#ifdef __cplusplus
18extern "C"
19{
20#endif
21
22struct DIR
23{
24    long                handle; /* -1 for failed rewind */
25    struct _finddata_t  info;
26    struct dirent       result; /* d_name null iff first time */
27    char                *name;  /* null-terminated char string */
28};
29
30DIR *opendir(const char *name)
31{
32    DIR *dir = 0;
33
34    if(name && name[0])
35    {
36        size_t base_length = strlen(name);
37        const char *all = /* search pattern must end with suitable wildcard */
38            strchr("/\\", name[base_length - 1]) ? "*" : "/*";
39
40        if((dir = (DIR *) malloc(sizeof *dir)) != 0 &&
41           (dir->name = (char *) malloc(base_length + strlen(all) + 1)) != 0)
42        {
43            strcat(strcpy(dir->name, name), all);
44
45            if((dir->handle = (long) _findfirst(dir->name, &dir->info)) != -1)
46            {
47                dir->result.d_name = 0;
48            }
49            else /* rollback */
50            {
51                free(dir->name);
52                free(dir);
53                dir = 0;
54            }
55        }
56        else /* rollback */
57        {
58            free(dir);
59            dir   = 0;
60            errno = ENOMEM;
61        }
62    }
63    else
64    {
65        errno = EINVAL;
66    }
67
68    return dir;
69}
70
71int closedir(DIR *dir)
72{
73    int result = -1;
74
75    if(dir)
76    {
77        if(dir->handle != -1)
78        {
79            result = _findclose(dir->handle);
80        }
81
82        free(dir->name);
83        free(dir);
84    }
85
86    if(result == -1) /* map all errors to EBADF */
87    {
88        errno = EBADF;
89    }
90
91    return result;
92}
93
94struct dirent *readdir(DIR *dir)
95{
96    struct dirent *result = 0;
97
98    if(dir && dir->handle != -1)
99    {
100        if(!dir->result.d_name || _findnext(dir->handle, &dir->info) != -1)
101        {
102            result         = &dir->result;
103            result->d_name = dir->info.name;
104        }
105    }
106    else
107    {
108        errno = EBADF;
109    }
110
111    return result;
112}
113
114void rewinddir(DIR *dir)
115{
116    if(dir && dir->handle != -1)
117    {
118        _findclose(dir->handle);
119        dir->handle = (long) _findfirst(dir->name, &dir->info);
120        dir->result.d_name = 0;
121    }
122    else
123    {
124        errno = EBADF;
125    }
126}
127
128#ifdef __cplusplus
129}
130#endif
131
132/*
133
134    Copyright Kevlin Henney, 1997, 2003. All rights reserved.
135
136    Permission to use, copy, modify, and distribute this software and its
137    documentation for any purpose is hereby granted without fee, provided
138    that this copyright and permissions notice appear in all copies and
139    derivatives.
140   
141    This software is supplied "as is" without express or implied warranty.
142
143    But that said, if there are any problems please get in touch.
144
145*/
146
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