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