thin-provisioning-tools/persistent-data/data-structures/btree_node_checker.cc

127 lines
3.4 KiB
C++

#include "btree_node_checker.h"
#include <sstream>
using persistent_data::btree_detail::btree_node_checker;
//----------------------------------------------------------------
btree_node_checker::error_type btree_node_checker::get_last_error() const {
return last_error_;
}
std::string btree_node_checker::get_last_error_string() const {
switch (last_error_) {
case BLOCK_NR_MISMATCH:
return block_nr_mismatch_string();
case VALUE_SIZES_MISMATCH:
return value_sizes_mismatch_string();
case MAX_ENTRIES_TOO_LARGE:
return max_entries_too_large_string();
case MAX_ENTRIES_NOT_DIVISIBLE:
return max_entries_not_divisible_string();
case NR_ENTRIES_TOO_LARGE:
return nr_entries_too_large_string();
case NR_ENTRIES_TOO_SMALL:
return nr_entries_too_small_string();
case KEYS_OUT_OF_ORDER:
return keys_out_of_order_string();
case PARENT_KEY_MISMATCH:
return parent_key_mismatch_string();
case LEAF_KEY_OVERLAPPED:
return leaf_key_overlapped_string();
default:
return std::string();
}
}
void btree_node_checker::reset() {
last_error_ = NO_ERROR;
}
std::string btree_node_checker::block_nr_mismatch_string() const {
std::ostringstream out;
out << "block number mismatch: actually "
<< error_location_
<< ", claims " << error_block_nr_;
return out.str();
}
std::string btree_node_checker::value_sizes_mismatch_string() const {
std::ostringstream out;
out << "value size mismatch: expected " << error_value_sizes_[1]
<< ", but got " << error_value_sizes_[0]
<< " (block " << error_location_ << ").";
return out.str();
}
std::string btree_node_checker::max_entries_too_large_string() const {
std::ostringstream out;
out << "max entries too large: " << error_max_entries_
<< " (block " << error_location_ << ")";
return out.str();
}
std::string btree_node_checker::max_entries_not_divisible_string() const {
std::ostringstream out;
out << "max entries is not divisible by 3: " << error_max_entries_
<< " (block " << error_location_ << ")";
return out.str();
}
std::string btree_node_checker::nr_entries_too_large_string() const {
std::ostringstream out;
out << "bad nr_entries: "
<< error_nr_entries_ << " < "
<< error_max_entries_
<< " (block " << error_location_ << ")";
return out.str();
}
std::string btree_node_checker::nr_entries_too_small_string() const {
std::ostringstream out;
out << "too few entries in btree_node: "
<< error_nr_entries_
<< ", expected at least "
<< (error_max_entries_ / 3)
<< " (block " << error_location_
<< ", max_entries = " << error_max_entries_ << ")";
return out.str();
}
std::string btree_node_checker::keys_out_of_order_string() const {
std::ostringstream out;
out << "keys are out of order, "
<< error_keys_[0] << " <= " << error_keys_[1]
<< " (block " << error_location_ << ")";
return out.str();
}
std::string btree_node_checker::parent_key_mismatch_string() const {
std::ostringstream out;
out << "parent key mismatch: parent was " << error_keys_[1]
<< ", but lowest in node was " << error_keys_[0]
<< " (block " << error_location_ << ")";
return out.str();
}
std::string btree_node_checker::leaf_key_overlapped_string() const {
std::ostringstream out;
out << "the last key of the previous leaf was " << error_keys_[1]
<< " and the first key of this leaf is " << error_keys_[0]
<< " (block " << error_location_ << ")";
return out.str();
}
//----------------------------------------------------------------