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/*
Implementation of POSIX directory browsing functions and types for Win32.
Author: Kevlin Henney (kevlin@acm.org, kevlin@curbralan.com)
History: Created March 1997. Updated June 2003 and July 2012.
Rights: See end of file.
*/
#include "dirent_on_windows.h"
#include <errno.h>
#include <io.h> /* _findfirst and _findnext set errno iff they return -1 */
#include <stdlib.h>
#include <string.h>
#include "allocation.h"
#if defined(__cplusplus)
extern "C" {
#endif
typedef ptrdiff_t handle_type; /* C99's intptr_t not sufficiently portable */
struct DIR {
handle_type handle; /* -1 for failed rewind */
struct _finddata_t info;
struct dirent result; /* d_name null iff first time */
char *name; /* null-terminated char string */
};
DIR *opendir(const VkAllocationCallbacks *pAllocator, const char *name) {
DIR *dir = 0;
if (name && name[0]) {
size_t base_length = strlen(name);
const char *all = /* search pattern must end with suitable wildcard */
strchr("/\\", name[base_length - 1]) ? "*" : "/*";
size_t full_length = base_length + strlen(all) + 1;
if ((dir = (DIR *)loader_alloc(pAllocator, sizeof *dir, VK_SYSTEM_ALLOCATION_SCOPE_COMMAND)) != 0 &&
(dir->name = (char *)loader_calloc(pAllocator, full_length, VK_SYSTEM_ALLOCATION_SCOPE_COMMAND)) != 0) {
loader_strncpy(dir->name, full_length, name, base_length);
loader_strncat(dir->name, full_length, all, strlen(all));
if ((dir->handle = (handle_type)_findfirst(dir->name, &dir->info)) != -1) {
dir->result.d_name = 0;
} else /* rollback */
{
loader_free(pAllocator, dir->name);
loader_free(pAllocator, dir);
dir = 0;
}
} else /* rollback */
{
loader_free(pAllocator, dir);
dir = 0;
errno = ENOMEM;
}
} else {
errno = EINVAL;
}
return dir;
}
int closedir(const VkAllocationCallbacks *pAllocator, DIR *dir) {
int result = -1;
if (dir) {
if (dir->handle != -1) {
result = _findclose(dir->handle);
}
loader_free(pAllocator, dir->name);
loader_free(pAllocator, dir);
}
if (result == -1) /* map all errors to EBADF */
{
errno = EBADF;
}
return result;
}
struct dirent *readdir(DIR *dir) {
struct dirent *result = 0;
if (dir && dir->handle != -1) {
if (!dir->result.d_name || _findnext(dir->handle, &dir->info) != -1) {
result = &dir->result;
result->d_name = dir->info.name;
}
// _findnext sets errno to ENOENT when no more matching files could be found, does not indicate an error
if (errno == ENOENT) {
errno = 0;
}
} else {
errno = EBADF;
}
return result;
}
void rewinddir(DIR *dir) {
if (dir && dir->handle != -1) {
_findclose(dir->handle);
dir->handle = (handle_type)_findfirst(dir->name, &dir->info);
dir->result.d_name = 0;
} else {
errno = EBADF;
}
}
#if defined(__cplusplus)
}
#endif
/*
Copyright Kevlin Henney, 1997, 2003, 2012. All rights reserved.
Copyright (c) 2015 The Khronos Group Inc.
Copyright (c) 2015 Valve Corporation
Copyright (c) 2015 LunarG, Inc.
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose is hereby granted without fee, provided
that this copyright and permissions notice appear in all copies and
derivatives.
This software is supplied "as is" without express or implied warranty.
But that said, if there are any problems please get in touch.
*/
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