mirror of
https://github.com/minetest/minetestmapper.git
synced 2024-11-13 22:20:29 +01:00
84 lines
2.2 KiB
C++
84 lines
2.2 KiB
C++
#include "db-sqlite3.h"
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#include <stdexcept>
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#include <unistd.h> // for usleep
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#define SQLRES(f, good) \
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result = (sqlite3_##f);\
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if (result != good) {\
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throw std::runtime_error(sqlite3_errmsg(m_db));\
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}
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#define SQLOK(f) SQLRES(f, SQLITE_OK)
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DBSQLite3::DBSQLite3(const std::string &mapdir) {
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int result;
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std::string db_name = mapdir + "map.sqlite";
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SQLOK(open_v2(db_name.c_str(), &m_db, SQLITE_OPEN_READONLY | SQLITE_OPEN_PRIVATECACHE, 0))
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SQLOK(prepare_v2(m_db,
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"SELECT pos, data FROM blocks WHERE (pos >= ? AND pos <= ?)",
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-1, &stmt_get_blocks, NULL))
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SQLOK(prepare_v2(m_db,
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"SELECT pos FROM blocks",
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-1, &stmt_get_block_pos, NULL))
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}
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DBSQLite3::~DBSQLite3() {
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int result;
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SQLOK(finalize(stmt_get_blocks));
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SQLOK(finalize(stmt_get_block_pos));
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SQLOK(close(m_db));
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}
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std::vector<int64_t> DBSQLite3::getBlockPos() {
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std::vector<int64_t> vec;
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int result = 0;
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while ((result = sqlite3_step(stmt_get_block_pos)) != SQLITE_DONE) {
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if (result == SQLITE_ROW) {
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int64_t blockpos = sqlite3_column_int64(stmt_get_block_pos, 0);
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vec.push_back(blockpos);
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} else if (result == SQLITE_BUSY) { // Wait some time and try again
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usleep(10000);
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} else {
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throw std::runtime_error(sqlite3_errmsg(m_db));
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}
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}
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return vec;
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}
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DBBlockList DBSQLite3::getBlocksOnZ(int zPos)
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{
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DBBlockList blocks;
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sqlite3_int64 psMin;
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sqlite3_int64 psMax;
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psMin = (static_cast<sqlite3_int64>(zPos) * 16777216L) - 0x800000;
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psMax = (static_cast<sqlite3_int64>(zPos) * 16777216L) + 0x7fffff;
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sqlite3_bind_int64(stmt_get_blocks, 1, psMin);
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sqlite3_bind_int64(stmt_get_blocks, 2, psMax);
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int result = 0;
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while ((result = sqlite3_step(stmt_get_blocks)) != SQLITE_DONE) {
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if (result == SQLITE_ROW) {
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int64_t blocknum = sqlite3_column_int64(stmt_get_blocks, 0);
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const unsigned char *data = reinterpret_cast<const unsigned char *>(sqlite3_column_blob(stmt_get_blocks, 1));
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int size = sqlite3_column_bytes(stmt_get_blocks, 1);
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blocks.push_back(DBBlock(blocknum, std::basic_string<unsigned char>(data, size)));
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} else if (result == SQLITE_BUSY) { // Wait some time and try again
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usleep(10000);
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} else {
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throw std::runtime_error(sqlite3_errmsg(m_db));
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}
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}
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SQLOK(reset(stmt_get_blocks));
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return blocks;
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}
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#undef SQLRES
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#undef SQLOK
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