1/* Copyright (c) 2013-2015 Jeffrey Pfau
  2 *
  3 * This Source Code Form is subject to the terms of the Mozilla Public
  4 * License, v. 2.0. If a copy of the MPL was not distributed with this
  5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  6#include "util/vfs.h"
  7
  8#include <sys/iosupport.h>
  9
 10static bool _vdlClose(struct VDir* vd);
 11static void _vdlRewind(struct VDir* vd);
 12static struct VDirEntry* _vdlListNext(struct VDir* vd);
 13static struct VFile* _vdlOpenFile(struct VDir* vd, const char* path, int mode);
 14static struct VDir* _vdlOpenDir(struct VDir* vd, const char* path);
 15
 16static const char* _vdleName(struct VDirEntry* vde);
 17static enum VFSType _vdleType(struct VDirEntry* vde);
 18
 19struct VDirEntryDevList {
 20	struct VDirEntry d;
 21	size_t index;
 22	char* name;
 23};
 24
 25struct VDirDevList {
 26	struct VDir d;
 27	struct VDirEntryDevList vde;
 28};
 29
 30struct VDir* VDeviceList() {
 31	struct VDirDevList* vd = malloc(sizeof(struct VDirDevList));
 32	if (!vd) {
 33		return 0;
 34	}
 35
 36	vd->d.close = _vdlClose;
 37	vd->d.rewind = _vdlRewind;
 38	vd->d.listNext = _vdlListNext;
 39	vd->d.openFile = _vdlOpenFile;
 40	vd->d.openDir = _vdlOpenDir;
 41
 42	vd->vde.d.name = _vdleName;
 43	vd->vde.d.type = _vdleType;
 44	vd->vde.index = 0;
 45	vd->vde.name = 0;
 46
 47	return &vd->d;
 48}
 49
 50static bool _vdlClose(struct VDir* vd) {
 51	struct VDirDevList* vdl = (struct VDirDevList*) vd;
 52	free(vdl->vde.name);
 53	free(vdl);
 54	return true;
 55}
 56
 57static void _vdlRewind(struct VDir* vd) {
 58	struct VDirDevList* vdl = (struct VDirDevList*) vd;
 59	free(vdl->vde.name);
 60	vdl->vde.name = 0;
 61	vdl->vde.index = 3;
 62}
 63
 64static struct VDirEntry* _vdlListNext(struct VDir* vd) {
 65	struct VDirDevList* vdl = (struct VDirDevList*) vd;
 66	if (vdl->vde.name) {
 67		++vdl->vde.index;
 68		free(vdl->vde.name);
 69		vdl->vde.name = 0;
 70	}
 71	while (vdl->vde.index < STD_MAX) {
 72		const devoptab_t *devops = devoptab_list[vdl->vde.index];
 73		if (devops->dirStateSize > 0) {
 74			vdl->vde.name = malloc(strlen(devops->name) + 3);
 75			sprintf(vdl->vde.name, "%s:", devops->name);
 76			return &vdl->vde.d;
 77		}
 78
 79		++vdl->vde.index;
 80	}
 81	return 0;
 82}
 83
 84static struct VFile* _vdlOpenFile(struct VDir* vd, const char* path, int mode) {
 85	UNUSED(vd);
 86	UNUSED(path);
 87	UNUSED(mode);
 88	return 0;
 89}
 90
 91static struct VDir* _vdlOpenDir(struct VDir* vd, const char* path) {
 92	UNUSED(vd);
 93	return VDirOpen(path);
 94}
 95
 96static const char* _vdleName(struct VDirEntry* vde) {
 97	struct VDirEntryDevList* vdle = (struct VDirEntryDevList*) vde;
 98	return vdle->name;
 99}
100
101static enum VFSType _vdleType(struct VDirEntry* vde) {
102	UNUSED(vde);
103	return VFS_DIRECTORY;
104}