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 and July 2012.
7 Rights: See end of file.
8
9 */
10 #include "dirent_on_windows.h"
11 #include <errno.h>
12 #include <io.h> /* _findfirst and _findnext set errno iff they return -1 */
13 #include <stdlib.h>
14 #include <string.h>
15 #include "vk_loader_platform.h"
16 #include "loader.h"
17
18 #ifdef __cplusplus
19 extern "C" {
20 #endif
21
22 typedef ptrdiff_t handle_type; /* C99's intptr_t not sufficiently portable */
23
24 struct DIR {
25 handle_type handle; /* -1 for failed rewind */
26 struct _finddata_t info;
27 struct dirent result; /* d_name null iff first time */
28 char *name; /* null-terminated char string */
29 };
30
opendir(const char * name)31 DIR *opendir(const char *name) {
32 DIR *dir = 0;
33
34 if (name && name[0]) {
35 size_t base_length = strlen(name);
36 const char *all = /* search pattern must end with suitable wildcard */
37 strchr("/\\", name[base_length - 1]) ? "*" : "/*";
38
39 if ((dir = (DIR *)loader_instance_tls_heap_alloc(sizeof *dir)) != 0 &&
40 (dir->name = (char *)loader_instance_tls_heap_alloc(
41 base_length + strlen(all) + 1)) != 0) {
42 strcat(strcpy(dir->name, name), all);
43
44 if ((dir->handle =
45 (handle_type)_findfirst(dir->name, &dir->info)) != -1) {
46 dir->result.d_name = 0;
47 } else /* rollback */
48 {
49 loader_instance_tls_heap_free(dir->name);
50 loader_instance_tls_heap_free(dir);
51 dir = 0;
52 }
53 } else /* rollback */
54 {
55 loader_instance_tls_heap_free(dir);
56 dir = 0;
57 errno = ENOMEM;
58 }
59 } else {
60 errno = EINVAL;
61 }
62
63 return dir;
64 }
65
closedir(DIR * dir)66 int closedir(DIR *dir) {
67 int result = -1;
68
69 if (dir) {
70 if (dir->handle != -1) {
71 result = _findclose(dir->handle);
72 }
73
74 loader_instance_tls_heap_free(dir->name);
75 loader_instance_tls_heap_free(dir);
76 }
77
78 if (result == -1) /* map all errors to EBADF */
79 {
80 errno = EBADF;
81 }
82
83 return result;
84 }
85
readdir(DIR * dir)86 struct dirent *readdir(DIR *dir) {
87 struct dirent *result = 0;
88
89 if (dir && dir->handle != -1) {
90 if (!dir->result.d_name || _findnext(dir->handle, &dir->info) != -1) {
91 result = &dir->result;
92 result->d_name = dir->info.name;
93 }
94 } else {
95 errno = EBADF;
96 }
97
98 return result;
99 }
100
rewinddir(DIR * dir)101 void rewinddir(DIR *dir) {
102 if (dir && dir->handle != -1) {
103 _findclose(dir->handle);
104 dir->handle = (handle_type)_findfirst(dir->name, &dir->info);
105 dir->result.d_name = 0;
106 } else {
107 errno = EBADF;
108 }
109 }
110
111 #ifdef __cplusplus
112 }
113 #endif
114
115 /*
116
117 Copyright Kevlin Henney, 1997, 2003, 2012. All rights reserved.
118 Copyright (c) 2015 The Khronos Group Inc.
119 Copyright (c) 2015 Valve Corporation
120 Copyright (c) 2015 LunarG, Inc.
121 Permission to use, copy, modify, and distribute this software and its
122 documentation for any purpose is hereby granted without fee, provided
123 that this copyright and permissions notice appear in all copies and
124 derivatives.
125
126 This software is supplied "as is" without express or implied warranty.
127
128 But that said, if there are any problems please get in touch.
129
130 */
131