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Annotation of parser3/src/classes/void.C, revision 1.7

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: */
1.7     ! parser      8: static const char *RCSId="$Id: void.C,v 1.6 2001/08/09 06:44:04 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();
1.6       parser     34:        VVoid *vvoid=static_cast<VVoid *>(r.self);
1.7     ! parser     35:        r.write_no_lang(*new(pool) VInt(pool, vvoid->as_int()));
1.1       parser     36: }
                     37: 
                     38: static void _double(Request& r, const String&, MethodParams *) {
                     39:        Pool& pool=r.pool();
1.6       parser     40:        VVoid *vvoid=static_cast<VVoid *>(r.self);
1.7     ! parser     41:        r.write_no_lang(*new(pool) VDouble(pool, vvoid->as_double()));
1.1       parser     42: }
                     43: 
1.5       parser     44: #ifndef DOXYGEN
                     45: class Void_sql_event_handlers : public SQL_Driver_query_event_handlers {
                     46: public:
                     47:        Void_sql_event_handlers(Pool& apool, const String& astatement_string) :
                     48:                pool(apool), statement_string(astatement_string) {
                     49:        }
                     50:        void add_column(void *ptr, size_t size) { /* ignore */ }
                     51:        void before_rows() {
                     52:                // there are some result rows, which is wrong
                     53:                PTHROW(0, 0,
                     54:                        &statement_string,
                     55:                        "must return nothing");
                     56:        }
                     57:        void add_row() { /* never */ }
                     58:        void add_row_cell(void *ptr, size_t size) { /* never */ }
                     59: 
                     60: private:
                     61:        Pool& pool;
                     62:        const String& statement_string;
                     63: };
                     64: #endif
1.1       parser     65: static void _sql(Request& r, const String& method_name, MethodParams *params) {
                     66:        Pool& pool=r.pool();
                     67: 
                     68:        if(!r.connection)
                     69:                PTHROW(0, 0,
                     70:                        &method_name,
                     71:                        "without connect");
                     72: 
1.4       parser     73:        Value& statement=params->as_junction(0, "statement must be code");
1.1       parser     74: 
                     75:        Temp_lang temp_lang(r, String::UL_SQL);
                     76:        const String& statement_string=r.process(statement).as_string();
                     77:        const char *statement_cstr=
                     78:                statement_string.cstr(String::UL_UNSPECIFIED, r.connection);
1.5       parser     79:        Void_sql_event_handlers handlers(pool, statement_string);
1.1       parser     80:        bool need_rethrow=false; Exception rethrow_me;
                     81:        PTRY {
                     82:                r.connection->query(
                     83:                        statement_cstr, 0, 0,
1.5       parser     84:                        handlers);
1.1       parser     85:        }
1.5       parser     86:        PCATCH(e) {
1.1       parser     87:                rethrow_me=e;  need_rethrow=true;
                     88:        }
                     89:        PEND_CATCH
                     90:        if(need_rethrow)
                     91:                PTHROW(rethrow_me.type(), rethrow_me.code(),
                     92:                        &statement_string, // setting more specific source [were url]
                     93:                        rethrow_me.comment());
                     94: }
                     95: 
                     96: // constructor
                     97: 
                     98: MVoid::MVoid(Pool& apool) : Methoded(apool) {
                     99:        set_name(*NEW String(pool(), VOID_CLASS_NAME));
                    100: 
                    101: 
                    102:        // ^VOID.int[]
                    103:        add_native_method("int", Method::CT_DYNAMIC, _int, 0, 0);
                    104: 
                    105:        // ^VOID.double[]
                    106:        add_native_method("double", Method::CT_DYNAMIC, _double, 0, 0);
                    107: 
                    108:        // ^sql[query]
                    109:        add_native_method("sql", Method::CT_STATIC, _sql, 1, 1);
                    110: }
                    111: 
                    112: // global variable
                    113: 
                    114: Methoded *void_class;
                    115: 
                    116: // creator
                    117: 
                    118: Methoded *MVoid_create(Pool& pool) {
                    119:        return void_class=new(pool) MVoid(pool);
                    120: }