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Add ability to delete MapBlocks from map

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Also add a Lua API and chatcommand for this
This commit is contained in:
kwolekr 2015-01-15 16:20:05 -05:00
parent 0330cec7ec
commit 9736548720
15 changed files with 187 additions and 19 deletions
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41
src/database-sqlite3.cpp
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@ -131,13 +131,11 @@ void Database_SQLite3::verifyDatabase() {
throw FileNotGoodException("Cannot prepare write statement");
}
#ifdef __ANDROID__
d = sqlite3_prepare(m_database, "DELETE FROM `blocks` WHERE `pos`=?;", -1, &m_database_delete, NULL);
if(d != SQLITE_OK) {
infostream<<"WARNING: SQLite3 database delete statment failed to prepare: "<<sqlite3_errmsg(m_database)<<std::endl;
throw FileNotGoodException("Cannot prepare delete statement");
}
#endif
d = sqlite3_prepare(m_database, "SELECT `pos` FROM `blocks`", -1, &m_database_list, NULL);
if(d != SQLITE_OK) {
@ -148,22 +146,48 @@ void Database_SQLite3::verifyDatabase() {
infostream<<"ServerMap: SQLite3 database opened"<<std::endl;
}
bool Database_SQLite3::deleteBlock(v3s16 blockpos)
{
verifyDatabase();
if (sqlite3_bind_int64(m_database_delete, 1,
getBlockAsInteger(blockpos)) != SQLITE_OK) {
errorstream << "WARNING: Could not bind block position for delete: "
<< sqlite3_errmsg(m_database) << std::endl;
}
if (sqlite3_step(m_database_delete) != SQLITE_DONE) {
errorstream << "WARNING: deleteBlock: Block failed to delete "
<< PP(blockpos) << ": " << sqlite3_errmsg(m_database) << std::endl;
sqlite3_reset(m_database_delete);
return false;
}
sqlite3_reset(m_database_delete);
return true;
}
bool Database_SQLite3::saveBlock(v3s16 blockpos, std::string &data)
{
verifyDatabase();
s64 bkey = getBlockAsInteger(blockpos);
#ifdef __ANDROID__
/**
* Note: For some unknown reason sqlite3 fails to REPLACE blocks on android,
* deleting them and inserting first works.
*/
if (sqlite3_bind_int64(m_database_read, 1, getBlockAsInteger(blockpos)) != SQLITE_OK) {
if (sqlite3_bind_int64(m_database_read, 1, bkey) != SQLITE_OK) {
infostream << "WARNING: Could not bind block position for load: "
<< sqlite3_errmsg(m_database)<<std::endl;
}
if (sqlite3_step(m_database_read) == SQLITE_ROW) {
if (sqlite3_bind_int64(m_database_delete, 1, getBlockAsInteger(blockpos)) != SQLITE_OK) {
int step_result = sqlite3_step(m_database_read);
sqlite3_reset(m_database_read);
if (step_result == SQLITE_ROW) {
if (sqlite3_bind_int64(m_database_delete, 1, bkey) != SQLITE_OK) {
infostream << "WARNING: Could not bind block position for delete: "
<< sqlite3_errmsg(m_database)<<std::endl;
}
@ -175,17 +199,17 @@ bool Database_SQLite3::saveBlock(v3s16 blockpos, std::string &data)
}
sqlite3_reset(m_database_delete);
}
sqlite3_reset(m_database_read);
#endif
if (sqlite3_bind_int64(m_database_write, 1, getBlockAsInteger(blockpos)) != SQLITE_OK) {
if (sqlite3_bind_int64(m_database_write, 1, bkey) != SQLITE_OK) {
errorstream << "WARNING: saveBlock: Block position failed to bind: "
<< PP(blockpos) << ": " << sqlite3_errmsg(m_database) << std::endl;
sqlite3_reset(m_database_write);
return false;
}
if (sqlite3_bind_blob(m_database_write, 2, (void *) data.c_str(), data.size(), NULL) != SQLITE_OK) {
if (sqlite3_bind_blob(m_database_write, 2, (void *)data.c_str(),
data.size(), NULL) != SQLITE_OK) {
errorstream << "WARNING: saveBlock: Block data failed to bind: "
<< PP(blockpos) << ": " << sqlite3_errmsg(m_database) << std::endl;
sqlite3_reset(m_database_write);
@ -277,6 +301,7 @@ Database_SQLite3::~Database_SQLite3()
FINALIZE_STATEMENT(m_database_read)
FINALIZE_STATEMENT(m_database_write)
FINALIZE_STATEMENT(m_database_list)
FINALIZE_STATEMENT(m_database_delete)
if(m_database)
rc = sqlite3_close(m_database);