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Annotation of parser3/src/classes/void.C, revision 1.21.2.1

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)
1.20      paf         6: */
1.1       parser      7: 
1.21.2.1! paf         8: static const char* IDENT_VOID_C="$Date: 2002/08/01 11:41:13 $";
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: // 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: 
1.21.2.1! paf        28: static void _length(Request& r, const String&, MethodParams *params) {
        !            29:        Pool& pool=r.pool();
        !            30:        r.write_no_lang(*new(pool) VInt(pool, 0));
        !            31: }
        !            32: 
1.8       parser     33: static void _int(Request& r, const String&, MethodParams *params) {
1.1       parser     34:        Pool& pool=r.pool();
1.6       parser     35:        VVoid *vvoid=static_cast<VVoid *>(r.self);
1.8       parser     36:        r.write_no_lang(*new(pool) VInt(pool, 
1.11      parser     37:                params->size()==0?vvoid->as_int():params->as_int(0, "default must be int", r)));
1.1       parser     38: }
                     39: 
1.8       parser     40: static void _double(Request& r, const String&, MethodParams *params) {
1.1       parser     41:        Pool& pool=r.pool();
1.6       parser     42:        VVoid *vvoid=static_cast<VVoid *>(r.self);
1.8       parser     43:        r.write_no_lang(*new(pool) VDouble(pool, 
1.11      parser     44:                params->size()==0?vvoid->as_double():params->as_double(0, "default must be double", r)));
1.1       parser     45: }
                     46: 
1.5       parser     47: #ifndef DOXYGEN
                     48: class Void_sql_event_handlers : public SQL_Driver_query_event_handlers {
                     49: public:
                     50:        Void_sql_event_handlers(Pool& apool, const String& astatement_string) :
                     51:                pool(apool), statement_string(astatement_string) {
                     52:        }
                     53:        void add_column(void *ptr, size_t size) { /* ignore */ }
                     54:        void before_rows() {
                     55:                // there are some result rows, which is wrong
1.17      paf        56:                throw Exception("parser.runtime",
1.5       parser     57:                        &statement_string,
                     58:                        "must return nothing");
                     59:        }
                     60:        void add_row() { /* never */ }
                     61:        void add_row_cell(void *ptr, size_t size) { /* never */ }
                     62: 
                     63: private:
                     64:        Pool& pool;
                     65:        const String& statement_string;
                     66: };
                     67: #endif
1.1       parser     68: static void _sql(Request& r, const String& method_name, MethodParams *params) {
                     69:        Pool& pool=r.pool();
                     70: 
1.4       parser     71:        Value& statement=params->as_junction(0, "statement must be code");
1.1       parser     72: 
                     73:        Temp_lang temp_lang(r, String::UL_SQL);
1.18      paf        74:        const String& statement_string=r.process_to_string(statement);
1.1       parser     75:        const char *statement_cstr=
1.14      paf        76:                statement_string.cstr(String::UL_UNSPECIFIED, r.connection(&method_name));
1.5       parser     77:        Void_sql_event_handlers handlers(pool, statement_string);
1.12      parser     78:        try {
1.14      paf        79:                r.connection(&method_name)->query(
1.1       parser     80:                        statement_cstr, 0, 0,
1.5       parser     81:                        handlers);
1.12      parser     82:        } catch(const Exception& e) {
                     83:                // more specific source [were url]
1.17      paf        84:                throw Exception("sql.execute", 
1.12      parser     85:                        &statement_string, 
                     86:                        "%s", e.comment());
1.1       parser     87:        }
                     88: }
                     89: 
                     90: // constructor
                     91: 
1.19      paf        92: MVoid::MVoid(Pool& apool) : Methoded(apool, "void") {
1.21.2.1! paf        93:        // ^void.length[] 
        !            94:        add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
        !            95: 
1.9       parser     96:        // ^void.int[] 
                     97:        // ^void.int(default)
1.8       parser     98:        add_native_method("int", Method::CT_DYNAMIC, _int, 0, 1);
1.1       parser     99: 
1.9       parser    100:        // ^void.double[] 
                    101:        // ^void.double(default)
1.8       parser    102:        add_native_method("double", Method::CT_DYNAMIC, _double, 0, 1);
1.1       parser    103: 
                    104:        // ^sql[query]
                    105:        add_native_method("sql", Method::CT_STATIC, _sql, 1, 1);
                    106: }
                    107: 
                    108: // global variable
                    109: 
                    110: Methoded *void_class;
                    111: 
                    112: // creator
                    113: 
                    114: Methoded *MVoid_create(Pool& pool) {
                    115:        return void_class=new(pool) MVoid(pool);
                    116: }