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Annotation of parser3/src/classes/void.C, revision 1.13

1.1       parser      1: /** @file
                      2:        Parser: @b VOID parser class.
                      3: 
                      4:        Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.13    ! paf         5:        Author: Alexander Petrosyan <paf@design.ru> (http://paf.design.ru)
1.1       parser      6: 
1.13    ! paf         7:        $Id: void.C,v 1.12 2001/10/19 12:43:30 parser 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: // 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: 
1.8       parser     32: static void _int(Request& r, const String&, MethodParams *params) {
1.1       parser     33:        Pool& pool=r.pool();
1.6       parser     34:        VVoid *vvoid=static_cast<VVoid *>(r.self);
1.8       parser     35:        r.write_no_lang(*new(pool) VInt(pool, 
1.11      parser     36:                params->size()==0?vvoid->as_int():params->as_int(0, "default must be int", r)));
1.1       parser     37: }
                     38: 
1.8       parser     39: static void _double(Request& r, const String&, MethodParams *params) {
1.1       parser     40:        Pool& pool=r.pool();
1.6       parser     41:        VVoid *vvoid=static_cast<VVoid *>(r.self);
1.8       parser     42:        r.write_no_lang(*new(pool) VDouble(pool, 
1.11      parser     43:                params->size()==0?vvoid->as_double():params->as_double(0, "default must be double", r)));
1.1       parser     44: }
                     45: 
1.5       parser     46: #ifndef DOXYGEN
                     47: class Void_sql_event_handlers : public SQL_Driver_query_event_handlers {
                     48: public:
                     49:        Void_sql_event_handlers(Pool& apool, const String& astatement_string) :
                     50:                pool(apool), statement_string(astatement_string) {
                     51:        }
                     52:        void add_column(void *ptr, size_t size) { /* ignore */ }
                     53:        void before_rows() {
                     54:                // there are some result rows, which is wrong
1.12      parser     55:                throw Exception(0, 0,
1.5       parser     56:                        &statement_string,
                     57:                        "must return nothing");
                     58:        }
                     59:        void add_row() { /* never */ }
                     60:        void add_row_cell(void *ptr, size_t size) { /* never */ }
                     61: 
                     62: private:
                     63:        Pool& pool;
                     64:        const String& statement_string;
                     65: };
                     66: #endif
1.1       parser     67: static void _sql(Request& r, const String& method_name, MethodParams *params) {
                     68:        Pool& pool=r.pool();
                     69: 
                     70:        if(!r.connection)
1.12      parser     71:                throw Exception(0, 0,
1.1       parser     72:                        &method_name,
                     73:                        "without connect");
                     74: 
1.4       parser     75:        Value& statement=params->as_junction(0, "statement must be code");
1.1       parser     76: 
                     77:        Temp_lang temp_lang(r, String::UL_SQL);
                     78:        const String& statement_string=r.process(statement).as_string();
                     79:        const char *statement_cstr=
                     80:                statement_string.cstr(String::UL_UNSPECIFIED, r.connection);
1.5       parser     81:        Void_sql_event_handlers handlers(pool, statement_string);
1.12      parser     82:        try {
1.1       parser     83:                r.connection->query(
                     84:                        statement_cstr, 0, 0,
1.5       parser     85:                        handlers);
1.12      parser     86:        } catch(const Exception& e) {
                     87:                // more specific source [were url]
                     88:                throw Exception(e.type(), e.code(),
                     89:                        &statement_string, 
                     90:                        "%s", e.comment());
1.1       parser     91:        }
                     92: }
                     93: 
                     94: // constructor
                     95: 
                     96: MVoid::MVoid(Pool& apool) : Methoded(apool) {
                     97:        set_name(*NEW String(pool(), VOID_CLASS_NAME));
                     98: 
                     99: 
1.9       parser    100:        // ^void.int[] 
                    101:        // ^void.int(default)
1.8       parser    102:        add_native_method("int", Method::CT_DYNAMIC, _int, 0, 1);
1.1       parser    103: 
1.9       parser    104:        // ^void.double[] 
                    105:        // ^void.double(default)
1.8       parser    106:        add_native_method("double", Method::CT_DYNAMIC, _double, 0, 1);
1.1       parser    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: }