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Annotation of parser3/src/classes/void.C, revision 1.4

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: */
1.4     ! parser      8: static const char *RCSId="$Id: void.C,v 1.3 2001/06/28 07:44:17 parser Exp $"; 
1.1       parser      9: 
                     10: #include "classes.h"
                     11: #include "pa_request.h"
                     12: #include "pa_vint.h"
                     13: #include "pa_vdouble.h"
                     14: #include "pa_vvoid.h"
                     15: #include "pa_sql_connection.h"
                     16: 
                     17: // defines
                     18: 
                     19: #define VOID_CLASS_NAME "void"
                     20: 
                     21: // class
                     22: 
                     23: class MVoid : public Methoded {
                     24: public:
                     25:        MVoid(Pool& pool);
                     26: public: // Methoded
                     27:        bool used_directly() { return true; }
                     28: };
                     29: 
                     30: // methods
                     31: 
                     32: static void _int(Request& r, const String&, MethodParams *) {
                     33:        Pool& pool=r.pool();
                     34:        VInt *vunknown=static_cast<VInt *>(r.self);
                     35:        Value& value=*new(pool) VInt(pool, vunknown->as_int());
                     36:        r.write_no_lang(value);
                     37: }
                     38: 
                     39: static void _double(Request& r, const String&, MethodParams *) {
                     40:        Pool& pool=r.pool();
                     41:        VInt *vunknown=static_cast<VInt *>(r.self);
                     42:        Value& value=*new(pool) VDouble(pool, vunknown->as_double());
                     43:        r.write_no_lang(value);
                     44: }
                     45: 
                     46: static void _sql(Request& r, const String& method_name, MethodParams *params) {
                     47:        Pool& pool=r.pool();
                     48: 
                     49:        if(!r.connection)
                     50:                PTHROW(0, 0,
                     51:                        &method_name,
                     52:                        "without connect");
                     53: 
1.4     ! parser     54:        Value& statement=params->as_junction(0, "statement must be code");
1.1       parser     55: 
                     56:        Temp_lang temp_lang(r, String::UL_SQL);
                     57:        const String& statement_string=r.process(statement).as_string();
                     58:        const char *statement_cstr=
                     59:                statement_string.cstr(String::UL_UNSPECIFIED, r.connection);
                     60:        unsigned int sql_column_count; SQL_Driver::Cell *sql_columns;
                     61:        unsigned long sql_row_count; SQL_Driver::Cell **sql_rows;
                     62:        bool need_rethrow=false; Exception rethrow_me;
                     63:        PTRY {
                     64:                r.connection->query(
                     65:                        statement_cstr, 0, 0,
                     66:                        &sql_column_count, &sql_columns,
                     67:                        &sql_row_count, &sql_rows);
                     68:        }
                     69:        PCATCH(e) { // connect/process problem
                     70:                rethrow_me=e;  need_rethrow=true;
                     71:        }
                     72:        PEND_CATCH
                     73:        if(need_rethrow)
                     74:                PTHROW(rethrow_me.type(), rethrow_me.code(),
                     75:                        &statement_string, // setting more specific source [were url]
                     76:                        rethrow_me.comment());
                     77: 
                     78:        // there are some result rows, which is wrong
                     79:        if(sql_row_count)
                     80:                PTHROW(0, 0,
                     81:                        &statement_string,
                     82:                        "must not return result");
                     83: }
                     84: 
                     85: // constructor
                     86: 
                     87: MVoid::MVoid(Pool& apool) : Methoded(apool) {
                     88:        set_name(*NEW String(pool(), VOID_CLASS_NAME));
                     89: 
                     90: 
                     91:        // ^VOID.int[]
                     92:        add_native_method("int", Method::CT_DYNAMIC, _int, 0, 0);
                     93: 
                     94:        // ^VOID.double[]
                     95:        add_native_method("double", Method::CT_DYNAMIC, _double, 0, 0);
                     96: 
                     97:        // ^sql[query]
                     98:        add_native_method("sql", Method::CT_STATIC, _sql, 1, 1);
                     99: }
                    100: 
                    101: // global variable
                    102: 
                    103: Methoded *void_class;
                    104: 
                    105: // creator
                    106: 
                    107: Methoded *MVoid_create(Pool& pool) {
                    108:        return void_class=new(pool) MVoid(pool);
                    109: }