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Diff for /parser3/src/sql/pa_sql_driver.h between versions 1.6 and 1.30

version 1.6, 2001/04/17 19:00:46 version 1.30, 2002/12/09 11:11:33
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 /** @file  /** @file
         Parser: sql driver interface.          Parser: sql driver interface.
   
         Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)          Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)
           Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
         Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)  
   
         $Id$  
   
   
         driver dynamic library must look like this:          driver dynamic library must look like this:
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 #ifndef PA_SQL_DRIVER_H  #ifndef PA_SQL_DRIVER_H
 #define PA_SQL_DRIVER_H  #define PA_SQL_DRIVER_H
   
   static const char* IDENT_SQL_DRIVER_H="$Date$";
   
 #include <sys/types.h>  #include <sys/types.h>
   
   #define SQL_DRIVER_API_VERSION 0x0004
   #define SQL_DRIVER_CREATE create /* used in driver implementation */
   #define SQL_DRIVER_CREATE_NAME "create" /* could not figure out how to # it :( */
   
   /// fields are freed elsewhere
   class SQL_Exception {
           friend class SQL_Driver_services_impl;
   
           bool fdefined;
           const char *ftype;
           const void *fproblem_source;
           const char *fcomment;
   public:
           SQL_Exception():
                   fdefined(false) {}
           SQL_Exception(
                   const char *atype,
                   const void *aproblem_source, 
                   const char *acomment):
                   fdefined(true),
                   ftype(atype),
                   fproblem_source(aproblem_source),
                   fcomment(acomment) {}
           SQL_Exception(const char *acomment):
                   fdefined(true),
                   ftype(0),
                   fproblem_source(0),
                   fcomment(acomment) {}
   /*
           SQL_Exception(const SQL_Exception& src) : 
                   fdefined(src.fdefined),
                   ftype(src.ftype),
                   fproblem_source(src.fproblem_source),
                   fcomment(src.fcomment) {}
   */
           const SQL_Exception& operator =(const SQL_Exception& src) {
                   fdefined=src.fdefined;
                   ftype=src.ftype;
                   fproblem_source=src.fproblem_source;
                   fcomment=src.fcomment;
                   return *this;
           }
   
           bool defined() { return fdefined; }
           const char *type() { return ftype; }
           const void *problem_source() { return fproblem_source; }
           const char *comment() { return fcomment; }
   };
   
 /// service functions for SQL driver to use  /// service functions for SQL driver to use
 class Services_for_SQL_driver {  class SQL_Driver_services {
 public:  public:
         /// allocates some bytes on pool          /// allocates some bytes on pool
         virtual void *malloc(size_t size) =0;          virtual void *malloc(size_t size) =0;
         /// allocates some bytes clearing them with zeros          /// allocates some bytes clearing them with zeros
         virtual void *calloc(size_t size) =0;          virtual void *calloc(size_t size) =0;
         /// throw exception          /// prepare throw exception
         virtual void _throw(const char *comment) =0;          virtual void _throw(const SQL_Exception& e) =0;
           /// throw C++ exception from prepared
           virtual void propagate_exception() =0;
           /// helper func
           void _throw(const char *comment) { _throw(SQL_Exception(0, 0, comment)); }
   public:
           /// regretrully public, because can't make stack frames: "nowhere to return to"
           jmp_buf mark;
 };  };
   
 #define SQL_DRIVER_API_VERSION 0x0301  /// events, occuring when SQL_Driver::query()-ing
   class SQL_Driver_query_event_handlers {
   public:
           virtual void add_column(void *ptr, size_t size) =0;
           virtual void before_rows() =0;
           virtual void add_row() =0;
           virtual void add_row_cell(void *ptr, size_t size) =0;
   };
   
 /// SQL driver API  /// SQL driver API
 class SQL_Driver {  class SQL_Driver {
 public:  public:
   
         struct Cell {  
                 void *ptr;  
                 size_t size;  
         };  
   
 public:  
   
         /// assignes services to driver. you can not use driver until this  
         void set_services(Services_for_SQL_driver *aservices) { services=aservices; }  
   
         SQL_Driver() :  
                 services(0) {  
         }  
         /// get api version          /// get api version
         virtual int api_version() =0;          virtual int api_version() =0;
         /// initialize driver by loading sql dynamic link library          /// initialize driver by loading sql dynamic link library
         virtual const char *initialize(const char *dlopen_file_spec) =0;          virtual const char *initialize(char *dlopen_file_spec) =0;
         /// connect. @returns true+'connection' on success. 'error' on failure          /**     connect to sql database using 
         virtual void connect(char *url, void **connection) =0;                  @param used_only_to_connect_url 
                           format is driver specific
                           WARNING: must be used only to connect, for buffer doesn't live long enough
   
                   @returns true+'connection' on success. 'error' on failure
           */
           virtual void connect(char *used_only_in_connect_url_cstr, 
                   SQL_Driver_services& services, void **connection) =0;
         virtual void disconnect(void *connection) =0;          virtual void disconnect(void *connection) =0;
         virtual void commit(void *connection) =0;          virtual void commit(
         virtual void rollback(void *connection) =0;                  SQL_Driver_services& services, void *connection) =0;
           virtual void rollback(
                   SQL_Driver_services& services, void *connection) =0;
         /// @returns true to indicate that connection still alive           /// @returns true to indicate that connection still alive 
         virtual bool ping(void *connection) =0;          virtual bool ping(
                   SQL_Driver_services& services, void *connection) =0;
         /// encodes the string in 'from' to an escaped SQL string          /// encodes the string in 'from' to an escaped SQL string
         virtual unsigned int quote(void *connection,          virtual unsigned int quote(
                   SQL_Driver_services& services, void *connection,
                 char *to, const char *from, unsigned int length) =0;                  char *to, const char *from, unsigned int length) =0;
         virtual void query(void *connection,          virtual void query(
                   SQL_Driver_services& services, void *connection,
                 const char *statement, unsigned long offset, unsigned long limit,                  const char *statement, unsigned long offset, unsigned long limit,
                 unsigned int *column_count, Cell **columns,                  SQL_Driver_query_event_handlers& handlers) =0;
                 unsigned long *row_count, Cell ***rows) =0;  
         /// log error message  
         //static void log(Pool& pool, const char *fmt, ...);  
   
 protected:  
   
         Services_for_SQL_driver *services;  
 };  };
   
 typedef SQL_Driver *(*SQL_Driver_create_func)();  typedef SQL_Driver *(*SQL_Driver_create_func)();
Removed from v.1.6  
changed lines
  Added in v.1.30

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