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Annotation of parser3/src/classes/void.C, revision 1.19

1.1       parser      1: /** @file
                      2:        Parser: @b VOID parser class.
                      3: 
1.15      paf         4:        Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)
1.16      paf         5:        Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1       parser      6: 
1.19    ! paf         7:        $Id: void.C,v 1.18 2002/04/10 09:53:14 paf Exp $
1.1       parser      8: */
                      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: // class
                     18: 
                     19: class MVoid : public Methoded {
                     20: public:
                     21:        MVoid(Pool& pool);
                     22: public: // Methoded
                     23:        bool used_directly() { return true; }
                     24: };
                     25: 
                     26: // methods
                     27: 
1.8       parser     28: static void _int(Request& r, const String&, MethodParams *params) {
1.1       parser     29:        Pool& pool=r.pool();
1.6       parser     30:        VVoid *vvoid=static_cast<VVoid *>(r.self);
1.8       parser     31:        r.write_no_lang(*new(pool) VInt(pool, 
1.11      parser     32:                params->size()==0?vvoid->as_int():params->as_int(0, "default must be int", r)));
1.1       parser     33: }
                     34: 
1.8       parser     35: static void _double(Request& r, const String&, MethodParams *params) {
1.1       parser     36:        Pool& pool=r.pool();
1.6       parser     37:        VVoid *vvoid=static_cast<VVoid *>(r.self);
1.8       parser     38:        r.write_no_lang(*new(pool) VDouble(pool, 
1.11      parser     39:                params->size()==0?vvoid->as_double():params->as_double(0, "default must be double", r)));
1.1       parser     40: }
                     41: 
1.5       parser     42: #ifndef DOXYGEN
                     43: class Void_sql_event_handlers : public SQL_Driver_query_event_handlers {
                     44: public:
                     45:        Void_sql_event_handlers(Pool& apool, const String& astatement_string) :
                     46:                pool(apool), statement_string(astatement_string) {
                     47:        }
                     48:        void add_column(void *ptr, size_t size) { /* ignore */ }
                     49:        void before_rows() {
                     50:                // there are some result rows, which is wrong
1.17      paf        51:                throw Exception("parser.runtime",
1.5       parser     52:                        &statement_string,
                     53:                        "must return nothing");
                     54:        }
                     55:        void add_row() { /* never */ }
                     56:        void add_row_cell(void *ptr, size_t size) { /* never */ }
                     57: 
                     58: private:
                     59:        Pool& pool;
                     60:        const String& statement_string;
                     61: };
                     62: #endif
1.1       parser     63: static void _sql(Request& r, const String& method_name, MethodParams *params) {
                     64:        Pool& pool=r.pool();
                     65: 
1.4       parser     66:        Value& statement=params->as_junction(0, "statement must be code");
1.1       parser     67: 
                     68:        Temp_lang temp_lang(r, String::UL_SQL);
1.18      paf        69:        const String& statement_string=r.process_to_string(statement);
1.1       parser     70:        const char *statement_cstr=
1.14      paf        71:                statement_string.cstr(String::UL_UNSPECIFIED, r.connection(&method_name));
1.5       parser     72:        Void_sql_event_handlers handlers(pool, statement_string);
1.12      parser     73:        try {
1.14      paf        74:                r.connection(&method_name)->query(
1.1       parser     75:                        statement_cstr, 0, 0,
1.5       parser     76:                        handlers);
1.12      parser     77:        } catch(const Exception& e) {
                     78:                // more specific source [were url]
1.17      paf        79:                throw Exception("sql.execute", 
1.12      parser     80:                        &statement_string, 
                     81:                        "%s", e.comment());
1.1       parser     82:        }
                     83: }
                     84: 
                     85: // constructor
                     86: 
1.19    ! paf        87: MVoid::MVoid(Pool& apool) : Methoded(apool, "void") {
1.9       parser     88:        // ^void.int[] 
                     89:        // ^void.int(default)
1.8       parser     90:        add_native_method("int", Method::CT_DYNAMIC, _int, 0, 1);
1.1       parser     91: 
1.9       parser     92:        // ^void.double[] 
                     93:        // ^void.double(default)
1.8       parser     94:        add_native_method("double", Method::CT_DYNAMIC, _double, 0, 1);
1.1       parser     95: 
                     96:        // ^sql[query]
                     97:        add_native_method("sql", Method::CT_STATIC, _sql, 1, 1);
                     98: }
                     99: 
                    100: // global variable
                    101: 
                    102: Methoded *void_class;
                    103: 
                    104: // creator
                    105: 
                    106: Methoded *MVoid_create(Pool& pool) {
                    107:        return void_class=new(pool) MVoid(pool);
                    108: }