129 lines
3.3 KiB
C
129 lines
3.3 KiB
C
/*
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Implementation of POSIX directory browsing functions and types for Win32.
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Author: Kevlin Henney (kevlin@acm.org, kevlin@curbralan.com)
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History: Created March 1997. Updated June 2003 and July 2012.
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Rights: See end of file.
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*/
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#include "dirent_on_windows.h"
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#include <errno.h>
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#include <io.h> /* _findfirst and _findnext set errno iff they return -1 */
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#include <stdlib.h>
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#include <string.h>
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#include "vk_loader_platform.h"
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#include "loader.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef ptrdiff_t handle_type; /* C99's intptr_t not sufficiently portable */
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struct DIR {
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handle_type handle; /* -1 for failed rewind */
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struct _finddata_t info;
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struct dirent result; /* d_name null iff first time */
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char *name; /* null-terminated char string */
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};
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DIR *opendir(const char *name) {
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DIR *dir = 0;
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if (name && name[0]) {
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size_t base_length = strlen(name);
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const char *all = /* search pattern must end with suitable wildcard */
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strchr("/\\", name[base_length - 1]) ? "*" : "/*";
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if ((dir = (DIR *)loader_instance_tls_heap_alloc(sizeof *dir)) != 0 &&
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(dir->name = (char *)loader_instance_tls_heap_alloc(base_length + strlen(all) + 1)) != 0) {
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strcat(strcpy(dir->name, name), all);
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if ((dir->handle = (handle_type)_findfirst(dir->name, &dir->info)) != -1) {
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dir->result.d_name = 0;
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} else /* rollback */
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{
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loader_instance_tls_heap_free(dir->name);
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loader_instance_tls_heap_free(dir);
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dir = 0;
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}
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} else /* rollback */
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{
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loader_instance_tls_heap_free(dir);
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dir = 0;
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errno = ENOMEM;
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}
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} else {
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errno = EINVAL;
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}
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return dir;
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}
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int closedir(DIR *dir) {
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int result = -1;
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if (dir) {
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if (dir->handle != -1) {
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result = _findclose(dir->handle);
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}
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loader_instance_tls_heap_free(dir->name);
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loader_instance_tls_heap_free(dir);
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}
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if (result == -1) /* map all errors to EBADF */
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{
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errno = EBADF;
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}
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return result;
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}
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struct dirent *readdir(DIR *dir) {
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struct dirent *result = 0;
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if (dir && dir->handle != -1) {
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if (!dir->result.d_name || _findnext(dir->handle, &dir->info) != -1) {
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result = &dir->result;
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result->d_name = dir->info.name;
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}
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} else {
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errno = EBADF;
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}
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return result;
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}
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void rewinddir(DIR *dir) {
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if (dir && dir->handle != -1) {
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_findclose(dir->handle);
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dir->handle = (handle_type)_findfirst(dir->name, &dir->info);
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dir->result.d_name = 0;
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} else {
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errno = EBADF;
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}
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}
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#ifdef __cplusplus
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}
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#endif
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/*
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Copyright Kevlin Henney, 1997, 2003, 2012. All rights reserved.
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Copyright (c) 2015 The Khronos Group Inc.
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Copyright (c) 2015 Valve Corporation
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Copyright (c) 2015 LunarG, Inc.
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose is hereby granted without fee, provided
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that this copyright and permissions notice appear in all copies and
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derivatives.
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This software is supplied "as is" without express or implied warranty.
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But that said, if there are any problems please get in touch.
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*/
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