260 lines
8.4 KiB
C++
260 lines
8.4 KiB
C++
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#ifndef SQLITEPP
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#define SQLITEPP
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#include <iostream>
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#include <unordered_map>
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#include <vector>
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#ifndef WIN32
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#include <sqlite3.h>
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#else
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#include "sqlite3.h"
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#include <codecvt>
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#include <shlobj.h>
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std::string _w_2_8( const std::wstring &wstring ) {
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std::wstring_convert< std::codecvt_utf8_utf16< wchar_t > > wconv;
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return wconv.to_bytes( wstring );
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}
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std::wstring _8_2_w( const std::string &utf8 ) {
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std::wstring_convert< std::codecvt_utf8_utf16< wchar_t > > wconv;
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return wconv.from_bytes( utf8 );
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}
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#endif
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namespace SQLite {
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constexpr size_t OPEN_READONLY = 0x00000001;
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constexpr size_t OPEN_READWRITE = 0x00000002;
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constexpr size_t OPEN_CREATE = 0x00000004;
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constexpr size_t OPEN_URI = 0x00000040;
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constexpr size_t OPEN_MEMORY = 0x00000080;
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constexpr size_t OPEN_NOMUTEX = 0x00008000;
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constexpr size_t OPEN_FULLMUTEX = 0x00010000;
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constexpr size_t OPEN_SHAREDCACHE = 0x00020000;
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constexpr size_t OPEN_PRIVATECACHE = 0x00040000;
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class Database {
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public:
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Database() {}
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Database( const std::string &file, size_t options ) {
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open( file, options );
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}
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#ifdef WIN32
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Database( const std::wstring &file, size_t options ) {
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open( file, options );
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}
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#endif
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~Database() {
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close();
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}
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void open( const std::string &file, size_t options ) {
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if ( sqlite3_open_v2( file.c_str(), &db, options, nullptr ) ) {
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throw std::runtime_error( "Could not open database " + file );
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}
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}
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#ifdef WIN32
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void open( const std::wstring &file, size_t options ) {
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if ( sqlite3_open_v2( _w_2_8( file ).c_str(), &db, options,
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nullptr ) ) {
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throw std::runtime_error( "Could not open database " +
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_w_2_8( file ) );
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}
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}
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#endif
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// execute command without output
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void exec( const std::string &command ) {
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char *errMsg = nullptr;
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int rc = sqlite3_exec( db, command.c_str(), nullptr, nullptr, &errMsg );
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if ( rc )
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throw std::runtime_error( "\"" + command +
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"\" resulted in an error:\n" + errMsg );
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sqlite3_free( errMsg );
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}
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#ifdef WIN32
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void exec( const std::wstring &command ) {
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char *errMsg = nullptr;
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int rc = sqlite3_exec( db, _w_2_8( command ).c_str(), nullptr, nullptr,
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&errMsg );
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if ( rc )
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throw std::runtime_error( "\"" + _w_2_8( command ) +
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"\" resulted in an error:\n" + errMsg );
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sqlite3_free( errMsg );
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}
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#endif
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// execute command that should only output 1 result
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void exec( const std::string &command, std::string &output ) {
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char *errMsg = nullptr;
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int rc = sqlite3_exec( db, command.c_str(), insert_val_s,
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static_cast< void * >( &output ), &errMsg );
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if ( rc )
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throw std::runtime_error( "\"" + command +
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"\" resulted in an error:\n" + errMsg );
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sqlite3_free( errMsg );
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}
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#ifdef WIN32
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void exec( const std::wstring &command, std::wstring &output ) {
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char *errMsg = nullptr;
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int rc = sqlite3_exec( db, _w_2_8( command ).c_str(), insert_val_ws,
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static_cast< void * >( &output ), &errMsg );
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if ( rc )
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throw std::runtime_error( "\"" + _w_2_8( command ) +
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"\" resulted in an error:\n" + errMsg );
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sqlite3_free( errMsg );
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}
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#endif
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// didn't work with set for some reason, so only vector is allowed
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void exec( const std::string &command,
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std::vector< std::unordered_map< std::string, std::string > >
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&object ) {
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char *errMsg = nullptr;
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int rc = sqlite3_exec( db, command.c_str(), insert_col_val,
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static_cast< void * >( &object ), &errMsg );
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if ( rc )
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throw std::runtime_error( "\"" + command +
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"\" resulted in an error:\n" + errMsg );
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sqlite3_free( errMsg );
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}
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#ifdef WIN32
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// didn't work with set for some reason, so only vector is allowed
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void exec( const std::wstring &command,
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std::vector< std::unordered_map< std::wstring, std::wstring > >
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&object ) {
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char *errMsg = nullptr;
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int rc = sqlite3_exec( db, _w_2_8( command ).c_str(), insert_col_val_w,
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static_cast< void * >( &object ), &errMsg );
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if ( rc )
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throw std::runtime_error( "\"" + _w_2_8( command ) +
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"\" resulted in an error:\n" + errMsg );
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sqlite3_free( errMsg );
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}
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#endif
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// execute command with output and store output in object (store only
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// values) object can by any container as long as it's template is
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// 'std::string'
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template < typename V > void exec( const std::string &command, V &object ) {
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char *errMsg = nullptr;
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int rc = sqlite3_exec( db, command.c_str(), insert_val< V >,
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static_cast< void * >( &object ), &errMsg );
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if ( rc )
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throw std::runtime_error( "\"" + command +
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"\" resulted in an error:\n" + errMsg );
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sqlite3_free( errMsg );
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}
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#ifdef WIN32
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template < typename V >
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void exec( const std::wstring &command, V &object ) {
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char *errMsg = nullptr;
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int rc = sqlite3_exec( db, _w_2_8( command ).c_str(), insert_val_w< V >,
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static_cast< void * >( &object ), &errMsg );
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if ( rc )
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throw std::runtime_error( "\"" + _w_2_8( command ) +
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"\" resulted in an error:\n" + errMsg );
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sqlite3_free( errMsg );
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}
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#endif
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void close() {
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sqlite3_close( db );
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}
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private:
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sqlite3 *db;
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static int insert_col_val( void *d, int argc, char **argv,
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char **azColName ) {
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auto &data = *static_cast<
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std::vector< std::unordered_map< std::string, std::string > > * >(
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d );
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std::unordered_map< std::string, std::string > buffer;
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for ( int i = 0; i < argc; i++ ) {
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// insert all columns and values into 'data'
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buffer[azColName[i]] = argv[i] ? argv[i] : "";
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}
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data.insert( data.end(), std::move( buffer ) );
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return 0;
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}
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#ifdef WIN32
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static int insert_col_val_w( void *d, int argc, char **argv,
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char **azColName ) {
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auto &data = *static_cast<
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std::vector< std::unordered_map< std::wstring, std::wstring > > * >(
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d );
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std::unordered_map< std::wstring, std::wstring > buffer;
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for ( int i = 0; i < argc; i++ ) {
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// insert all columns and values into 'data'
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buffer[_8_2_w( azColName[i] )] = argv[i] ? _8_2_w( argv[i] ) : L"";
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}
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data.insert( data.end(), std::move( buffer ) );
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return 0;
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}
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#endif
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static int insert_val_s( void *d, int argc, char **argv,
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char ** /*UNUSED*/ ) {
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auto &data = *static_cast< std::string * >( d );
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if ( argc > 0 ) {
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data = argv[0] ? argv[0] : "";
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}
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return 0;
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}
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#ifdef WIN32
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static int insert_val_ws( void *d, int argc, char **argv,
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char ** /*UNUSED*/ ) {
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auto &data = *static_cast< std::wstring * >( d );
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if ( argc > 0 ) {
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data = argv[0] ? _8_2_w( argv[0] ) : L"";
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}
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return 0;
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}
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#endif
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template < typename V >
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static int insert_val( void *d, int argc, char **argv,
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char ** /*UNUSED*/ ) {
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auto &data = *static_cast< V * >( d );
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for ( int i = 0; i < argc; i++ ) {
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// insert all values into 'data'
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data.insert( data.end(), argv[i] ? argv[i] : "" );
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}
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return 0;
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}
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#ifdef WIN32
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template < typename V >
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static int insert_val_w( void *d, int argc, char **argv,
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char ** /*UNUSED*/ ) {
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auto &data = *static_cast< V * >( d );
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for ( int i = 0; i < argc; i++ ) {
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// insert all values into 'data'
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data.insert( data.end(), argv[i] ? _8_2_w( argv[i] ) : L"" );
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}
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return 0;
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}
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#endif
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};
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} // namespace SQLite
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#endif
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