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
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 #include "allocation.h"
18
19 #if defined(__cplusplus)
20 extern "C" {
21 #endif
22
23 typedef ptrdiff_t handle_type; /* C99's intptr_t not sufficiently portable */
24
25 struct DIR {
26 handle_type handle; /* -1 for failed rewind */
27 struct _finddata_t info;
28 struct dirent result; /* d_name null iff first time */
29 char *name; /* null-terminated char string */
30 };
31
opendir(const VkAllocationCallbacks *pAllocator, const char *name)32 DIR *opendir(const VkAllocationCallbacks *pAllocator, const char *name) {
33 DIR *dir = 0;
34
35 if (name && name[0]) {
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 size_t full_length = base_length + strlen(all) + 1;
40
41 if ((dir = (DIR *)loader_alloc(pAllocator, sizeof *dir, VK_SYSTEM_ALLOCATION_SCOPE_COMMAND)) != 0 &&
42 (dir->name = (char *)loader_calloc(pAllocator, full_length, VK_SYSTEM_ALLOCATION_SCOPE_COMMAND)) != 0) {
43 loader_strncpy(dir->name, full_length, name, base_length);
44 loader_strncat(dir->name, full_length, all, strlen(all));
45
46 if ((dir->handle = (handle_type)_findfirst(dir->name, &dir->info)) != -1) {
47 dir->result.d_name = 0;
48 } else /* rollback */
49 {
50 loader_free(pAllocator, dir->name);
51 loader_free(pAllocator, dir);
52 dir = 0;
53 }
54 } else /* rollback */
55 {
56 loader_free(pAllocator, dir);
57 dir = 0;
58 errno = ENOMEM;
59 }
60 } else {
61 errno = EINVAL;
62 }
63
64 return dir;
65 }
66
closedir(const VkAllocationCallbacks *pAllocator, DIR *dir)67 int closedir(const VkAllocationCallbacks *pAllocator, DIR *dir) {
68 int result = -1;
69
70 if (dir) {
71 if (dir->handle != -1) {
72 result = _findclose(dir->handle);
73 }
74
75 loader_free(pAllocator, dir->name);
76 loader_free(pAllocator, dir);
77 }
78
79 if (result == -1) /* map all errors to EBADF */
80 {
81 errno = EBADF;
82 }
83
84 return result;
85 }
86
readdir(DIR *dir)87 struct dirent *readdir(DIR *dir) {
88 struct dirent *result = 0;
89
90 if (dir && dir->handle != -1) {
91 if (!dir->result.d_name || _findnext(dir->handle, &dir->info) != -1) {
92 result = &dir->result;
93 result->d_name = dir->info.name;
94 }
95 } else {
96 errno = EBADF;
97 }
98
99 return result;
100 }
101
rewinddir(DIR *dir)102 void rewinddir(DIR *dir) {
103 if (dir && dir->handle != -1) {
104 _findclose(dir->handle);
105 dir->handle = (handle_type)_findfirst(dir->name, &dir->info);
106 dir->result.d_name = 0;
107 } else {
108 errno = EBADF;
109 }
110 }
111
112 #if defined(__cplusplus)
113 }
114 #endif
115
116 /*
117
118 Copyright Kevlin Henney, 1997, 2003, 2012. All rights reserved.
119 Copyright (c) 2015 The Khronos Group Inc.
120 Copyright (c) 2015 Valve Corporation
121 Copyright (c) 2015 LunarG, Inc.
122 Permission to use, copy, modify, and distribute this software and its
123 documentation for any purpose is hereby granted without fee, provided
124 that this copyright and permissions notice appear in all copies and
125 derivatives.
126
127 This software is supplied "as is" without express or implied warranty.
128
129 But that said, if there are any problems please get in touch.
130
131 */
132