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Annotation of parser3/src/classes/void.C, revision 1.1

1.1     ! parser      1: /** @file
        !             2:        Parser: @b VOID parser class.
        !             3: 
        !             4:        Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
        !             5: 
        !             6:        Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
        !             7: 
        !             8:        $Id: VOID.C,v 1.4 2001/05/21 17:19:49 parser Exp $
        !             9: */
        !            10: 
        !            11: #include "classes.h"
        !            12: #include "pa_request.h"
        !            13: #include "pa_vint.h"
        !            14: #include "pa_vdouble.h"
        !            15: #include "pa_vvoid.h"
        !            16: #include "pa_sql_connection.h"
        !            17: 
        !            18: // defines
        !            19: 
        !            20: #define VOID_CLASS_NAME "void"
        !            21: 
        !            22: // class
        !            23: 
        !            24: class MVoid : public Methoded {
        !            25: public:
        !            26:        MVoid(Pool& pool);
        !            27: public: // Methoded
        !            28:        bool used_directly() { return true; }
        !            29: };
        !            30: 
        !            31: // methods
        !            32: 
        !            33: static void _int(Request& r, const String&, MethodParams *) {
        !            34:        Pool& pool=r.pool();
        !            35:        VInt *vunknown=static_cast<VInt *>(r.self);
        !            36:        Value& value=*new(pool) VInt(pool, vunknown->as_int());
        !            37:        r.write_no_lang(value);
        !            38: }
        !            39: 
        !            40: static void _double(Request& r, const String&, MethodParams *) {
        !            41:        Pool& pool=r.pool();
        !            42:        VInt *vunknown=static_cast<VInt *>(r.self);
        !            43:        Value& value=*new(pool) VDouble(pool, vunknown->as_double());
        !            44:        r.write_no_lang(value);
        !            45: }
        !            46: 
        !            47: static void _sql(Request& r, const String& method_name, MethodParams *params) {
        !            48:        Pool& pool=r.pool();
        !            49: 
        !            50:        if(!r.connection)
        !            51:                PTHROW(0, 0,
        !            52:                        &method_name,
        !            53:                        "without connect");
        !            54: 
        !            55:        Value& statement=params->get_junction(0, "statement must be code");
        !            56: 
        !            57:        Temp_lang temp_lang(r, String::UL_SQL);
        !            58:        const String& statement_string=r.process(statement).as_string();
        !            59:        const char *statement_cstr=
        !            60:                statement_string.cstr(String::UL_UNSPECIFIED, r.connection);
        !            61:        unsigned int sql_column_count; SQL_Driver::Cell *sql_columns;
        !            62:        unsigned long sql_row_count; SQL_Driver::Cell **sql_rows;
        !            63:        bool need_rethrow=false; Exception rethrow_me;
        !            64:        PTRY {
        !            65:                r.connection->query(
        !            66:                        statement_cstr, 0, 0,
        !            67:                        &sql_column_count, &sql_columns,
        !            68:                        &sql_row_count, &sql_rows);
        !            69:        }
        !            70:        PCATCH(e) { // connect/process problem
        !            71:                rethrow_me=e;  need_rethrow=true;
        !            72:        }
        !            73:        PEND_CATCH
        !            74:        if(need_rethrow)
        !            75:                PTHROW(rethrow_me.type(), rethrow_me.code(),
        !            76:                        &statement_string, // setting more specific source [were url]
        !            77:                        rethrow_me.comment());
        !            78: 
        !            79:        // there are some result rows, which is wrong
        !            80:        if(sql_row_count)
        !            81:                PTHROW(0, 0,
        !            82:                        &statement_string,
        !            83:                        "must not return result");
        !            84: }
        !            85: 
        !            86: // constructor
        !            87: 
        !            88: MVoid::MVoid(Pool& apool) : Methoded(apool) {
        !            89:        set_name(*NEW String(pool(), VOID_CLASS_NAME));
        !            90: 
        !            91: 
        !            92:        // ^VOID.int[]
        !            93:        add_native_method("int", Method::CT_DYNAMIC, _int, 0, 0);
        !            94: 
        !            95:        // ^VOID.double[]
        !            96:        add_native_method("double", Method::CT_DYNAMIC, _double, 0, 0);
        !            97: 
        !            98:        // ^sql[query]
        !            99:        add_native_method("sql", Method::CT_STATIC, _sql, 1, 1);
        !           100: }
        !           101: 
        !           102: // global variable
        !           103: 
        !           104: Methoded *void_class;
        !           105: 
        !           106: // creator
        !           107: 
        !           108: Methoded *MVoid_create(Pool& pool) {
        !           109:        return void_class=new(pool) MVoid(pool);
        !           110: }