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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2014 Adam Crume <adamcrume@gmail.com>
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include "rbd_loc.hpp"
#include "include/ceph_assert.h"
using namespace std;
using namespace rbd_replay;
rbd_loc::rbd_loc() {
}
rbd_loc::rbd_loc(const string &pool, const string &image, const string &snap)
: pool(pool),
image(image),
snap(snap) {
}
bool rbd_loc::parse(string name_string) {
int field = 0;
string fields[3];
bool read_slash = false;
bool read_at = false;
for (size_t i = 0, n = name_string.length(); i < n; i++) {
char c = name_string[i];
switch (c) {
case '/':
if (read_slash || read_at) {
return false;
}
ceph_assert(field == 0);
field++;
read_slash = true;
break;
case '@':
if (read_at) {
return false;
}
ceph_assert(field < 2);
field++;
read_at = true;
break;
case '\\':
if (i == n - 1) {
return false;
}
fields[field].push_back(name_string[++i]);
break;
default:
fields[field].push_back(c);
}
}
if (read_slash) {
pool = fields[0];
image = fields[1];
// note that if read_at is false, then fields[2] is the empty string,
// so this is still correct
snap = fields[2];
} else {
pool = "";
image = fields[0];
// note that if read_at is false, then fields[1] is the empty string,
// so this is still correct
snap = fields[1];
}
return true;
}
static void write(const string &in, string *out) {
for (size_t i = 0, n = in.length(); i < n; i++) {
char c = in[i];
if (c == '@' || c == '/' || c == '\\') {
out->push_back('\\');
}
out->push_back(c);
}
}
string rbd_loc::str() const {
string out;
if (!pool.empty()) {
write(pool, &out);
out.push_back('/');
}
write(image, &out);
if (!snap.empty()) {
out.push_back('@');
write(snap, &out);
}
return out;
}
int rbd_loc::compare(const rbd_loc& rhs) const {
int c = pool.compare(rhs.pool);
if (c) {
return c;
}
c = image.compare(rhs.image);
if (c) {
return c;
}
c = snap.compare(rhs.snap);
if (c) {
return c;
}
return 0;
}
bool rbd_loc::operator==(const rbd_loc& rhs) const {
return compare(rhs) == 0;
}
bool rbd_loc::operator<(const rbd_loc& rhs) const {
return compare(rhs) < 0;
}
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