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Builder C++ Embedded Server Sample
This commit is contained in:
miguel@hegel.br
283
libmysqld/examples/builder-sample/emb_samples.cpp
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283
libmysqld/examples/builder-sample/emb_samples.cpp
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//---------------------------------------------------------------------------
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#include <vcl.h>
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#pragma hdrstop
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#include "emb_samples.h"
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#include <winsock.h>
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#include <mysql.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <deque.h>
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bool b_new_line = false;
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const char *server_groups[] = {
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"", "embedded", "server", NULL
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};
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MYSQL *MySQL;
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deque<string> fill_rows(MYSQL_RES *res);
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//---------------------------------------------------------------------------
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#pragma package(smart_init)
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#pragma resource "*.dfm"
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TForm1 *Form1;
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//---------------------------------------------------------------------------
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deque<string> fill_rows(MYSQL_RES *res)
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{
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MYSQL_ROW row;
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deque<string> rows;
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while ((row=mysql_fetch_row(res)) != 0)
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{
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mysql_field_seek(res,0);
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for (unsigned int i=0 ; i < mysql_num_fields(res); i++)
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rows.push_back(row[i]);
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}
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return rows;
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}
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//---------------------------------------------------------------------------
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__fastcall TForm1::TForm1(TComponent* Owner)
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: TForm(Owner)
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{
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}
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//---------------------------------------------------------------------------
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void __fastcall TForm1::Timer1Timer(TObject *Sender)
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{
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if (is_server_started)
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{
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ToggleButton->Caption = "Quit";
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Timer1->Enabled = false;
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}
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}
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//---------------------------------------------------------------------------
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void __fastcall TForm1::FormCreate(TObject *Sender)
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{
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is_server_started = false;
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computer_ip(); /* get the computer name and IP number */
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/* init the tree database screen */
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db_root = DBView->Items->Add(NULL, db_root_caption.UpperCase());
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db_root->ImageIndex = 0;
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}
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//---------------------------------------------------------------------------
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/* button which handle the init of mysql server or quit the app */
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void __fastcall TForm1::ToggleButtonClick(TObject *Sender)
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{
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if (!is_server_started)
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{
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mysql_server_init(NULL, NULL, (char **)server_groups) ;
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connect_server();
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get_dbs();
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}
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else
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{
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mysql_server_end();
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Close();
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}
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}
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//---------------------------------------------------------------------------
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void __fastcall TForm1::computer_ip(void)
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{
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WORD wVersionRequested;
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WSADATA WSAData;
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wVersionRequested = MAKEWORD(1,1);
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WSAStartup(wVersionRequested,&WSAData);
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hostent *P;
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char s[128];
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in_addr in;
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char *P2;
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gethostname(s, 128);
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P = gethostbyname(s);
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db_root_caption = P->h_name;
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in.S_un.S_un_b.s_b1 = P->h_addr_list[0][0];
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in.S_un.S_un_b.s_b2 = P->h_addr_list[0][1];
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in.S_un.S_un_b.s_b3 = P->h_addr_list[0][2];
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in.S_un.S_un_b.s_b4 = P->h_addr_list[0][3];
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P2 = inet_ntoa(in);
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db_root_caption += " ( " + (AnsiString)P2 + " )";
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}
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//---------------------------------------------------------------------------
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bool __fastcall TForm1::connect_server()
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{
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bool ret_value = false;
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MySQL = mysql_init(MySQL);
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if (!MySQL)
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return ret_value;
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if (mysql_real_connect(MySQL, NULL, NULL, NULL, NULL, 0, NULL, 0))
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{
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ret_value = true;
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is_server_started = true;
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}
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return ret_value;
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}
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//---------------------------------------------------------------------------
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void __fastcall TForm1::FormDestroy(TObject *Sender)
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{
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if (is_server_started)
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mysql_server_end();
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}
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//---------------------------------------------------------------------------
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void __fastcall TForm1::DBViewClick(TObject *Sender)
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{
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if (DBView->Selected != db_root && DBView->Selected != NULL)
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{
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get_tables(DBView->Selected->Text);
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clean_desc_grid();
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}
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}
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//---------------------------------------------------------------------------
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bool __fastcall TForm1::get_tables(String db_name)
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{
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MYSQL_RES *res;
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AnsiString s_cmd;
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TableView->Items->Clear();
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s_cmd = "use ";
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s_cmd+= db_name.c_str();
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if (mysql_query(MySQL, s_cmd.c_str()) ||
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!(res=mysql_list_tables(MySQL,"%")))
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return false;
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tables_node = TableView->Items->Add(NULL, db_name.c_str());
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tables_node->ImageIndex = 1;
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tables_node->SelectedIndex = 1;
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deque<string> rows = fill_rows(res);
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mysql_free_result(res);
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fill_tree(rows,tables_tree,tables_node,TableView,2);
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return true;
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}
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//---------------------------------------------------------------------------
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bool __fastcall TForm1::get_dbs(void)
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{
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MYSQL_RES *res;
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if (!is_server_started)
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return false;
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if (!(res=mysql_list_dbs(MySQL,"%")))
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return false;
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deque<string> rows = fill_rows(res);
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mysql_free_result(res);
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fill_tree(rows,MySQLDbs,db_root,DBView,1);
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info_server->Text = mysql_get_server_info(MySQL);
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return true;
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}
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//---------------------------------------------------------------------------
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void __fastcall TForm1::fill_tree(deque<string> rows,
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TTreeNode *root,
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TTreeNode *child,
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TTreeView *View,
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int image_index)
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{
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deque<string>::iterator r;
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for(r = rows.begin(); r != rows.end() ; r++)
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{
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root = View->Items->AddChild(child, (*r).c_str());
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root->ImageIndex = image_index;
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root->SelectedIndex = image_index;
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}
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child->Expanded = true;
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}
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//---------------------------------------------------------------------------
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bool __fastcall TForm1::get_desc_table(String table_name)
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{
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MYSQL_RES *res, *res1;
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MYSQL_ROW row;
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AnsiString use_db, show_cols, show_desc;
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unsigned int num_fields;
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int fields_control = 0, grid_row = 1, fields_number;
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b_new_line= true;
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clean_desc_grid();
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use_db = "use ";
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use_db+= DBView->Selected->Text.c_str();
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show_desc = "desc ";
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show_cols = "show full columns from ";
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show_cols+= table_name.c_str();
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show_desc+= table_name.c_str();
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if (mysql_query(MySQL, use_db.c_str() ))
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return false;
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if (mysql_query(MySQL, show_cols.c_str() ) ||
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!(res1=mysql_store_result(MySQL)))
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{
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if (mysql_query(MySQL, show_desc.c_str() ) ||
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!(res1=mysql_store_result(MySQL)))
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return false ;
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}
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mysql_fetch_row(res1);
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mysql_field_seek(res1,0);
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fields_number = (mysql_num_fields(res1) - 2);
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mysql_free_result(res1);
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if (mysql_query(MySQL, show_cols.c_str() ) ||
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!(res=mysql_store_result(MySQL)))
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{
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if (mysql_query(MySQL, show_desc.c_str() ) ||
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!(res=mysql_store_result(MySQL)))
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return false ;
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}
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titles_grid();
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while ((row=mysql_fetch_row(res)) != 0)
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{
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mysql_field_seek(res,0);
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for (num_fields=0 ; num_fields < mysql_num_fields(res); num_fields++)
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{
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if (fields_control <= fields_number )
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{
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desc_table_grid->Cells[fields_control][grid_row] = row[num_fields];
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fields_control++;
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}
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else
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{
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desc_table_grid->Cells[(fields_control)][grid_row] = row[num_fields];
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fields_control = 0;
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grid_row++ ;
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desc_table_grid->RowCount++;
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}
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}
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}
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desc_table_grid->RowCount--;
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mysql_free_result(res);
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return true;
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}
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//---------------------------------------------------------------------------
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void __fastcall TForm1::TableViewClick(TObject *Sender)
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{
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if (DBView->Selected != db_root && DBView->Selected != NULL)
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if (DBView->Selected != tables_tree)
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get_desc_table(TableView->Selected->Text);
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}
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//---------------------------------------------------------------------------
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void __fastcall TForm1::clean_desc_grid(void)
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{
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desc_table_grid->RowCount= 2;
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desc_table_grid->Cells[0][1] = "";
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desc_table_grid->Cells[1][1] = "";
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desc_table_grid->Cells[2][1] = "";
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desc_table_grid->Cells[3][1] = "";
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desc_table_grid->Cells[4][1] = "";
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desc_table_grid->Cells[5][1] = "";
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}
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//---------------------------------------------------------------------------
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void __fastcall TForm1::titles_grid(void)
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{
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desc_table_grid->Cells[0][0] = "Field";
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desc_table_grid->Cells[1][0] = "Type";
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desc_table_grid->Cells[2][0] = "Null";
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desc_table_grid->Cells[3][0] = "Key";
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desc_table_grid->Cells[4][0] = "Default";
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desc_table_grid->Cells[5][0] = "Extra";
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desc_table_grid->Cells[6][0] = "Privileges";
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}
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