locales.c

sybase linux or unix develope library package

/* Program name : locales.c
**
** Description  : This program makes  the CS_LOCALE structure to set the
**		  date format to the required value. All possible values
**		  are defined in the open client header file: cstypes.h.
**		  Once we set up the LOCALE to define the dateformat we 
**		  wish, all datetime data processed by this client program 
**		  will be in the defined format. 
**		  Note that similar procedures are to be followed to set
**		  any localization information.
**
** References   : Open Client/Open Server Common Libraries and the Open Client 
**		  Client-Library/C Reference manuals.
**
*/

#include <stdio.h>
#include <ctpublic.h>
#include <cspublic.h>
#include <ospublic.h>
#include "./example.h"

/* Macro definitions for error handling */
#define RETURN_IF(a,b) if (a != CS_SUCCEED) {fprintf(stdout,"error in %s\n",b); return a;}

#define EXIT_IF(a) if (a != CS_SUCCEED) {fprintf(stdout,"FATAL error on line %d \n",__LINE__); exit(-1) ;}

#define MAX_COLUMN 	100 
#define MAX_COLSIZE 	255
#define EX_LOCALE	"us_english"

/* Global definitions */
char			rowbuffer[MAX_COLUMN][MAX_COLSIZE] ;
char			commandbuff[255] ;

/* Function declarations */
CS_RETCODE	init_db PROTOTYPE((
						CS_CONTEXT	**
						));
						
CS_RETCODE	connect_db PROTOTYPE((
						CS_CONTEXT 	*,
						CS_CONNECTION   **,
						CS_CHAR		*,
						CS_CHAR		*
					    ));
CS_RETCODE 	cleanup_db PROTOTYPE((
						CS_CONTEXT	*,
						CS_RETCODE	 
					    ));
CS_RETCODE	send_sql PROTOTYPE((
						CS_COMMAND	*
				  	    ));
CS_RETCODE	set_locale PROTOTYPE((
						CS_CONTEXT	*
				  	    ));
CS_RETCODE	handle_returns PROTOTYPE((
						CS_COMMAND	*
					    ));
CS_RETCODE 	bind_columns PROTOTYPE((
						CS_COMMAND	*
					    ));
CS_RETCODE	fetch_n_print PROTOTYPE((
						CS_COMMAND	*
				            ));
extern CS_RETCODE CS_PUBLIC   	ctlib_client_msg_handler PROTOTYPE((
						CS_CONTEXT	*,
						CS_CONNECTION 	*,
						CS_CLIENTMSG	*
						));
extern CS_RETCODE CS_PUBLIC   	ctlib_server_msg_handler PROTOTYPE((
						CS_CONTEXT	*,
						CS_CONNECTION 	*,
						CS_SERVERMSG	*
						));

int main()
{
	CS_CONTEXT	*cntx_ptr ;
	CS_CONNECTION	*conn_ptr ;
	CS_COMMAND	*cmd_ptr ;
	CS_RETCODE	ret ;

			/* Initialize the context */
	ret = init_db(&cntx_ptr);
		EXIT_IF(ret);

			/* Declare and customize the CS_LOCALE structure */
	ret = set_locale (cntx_ptr);
		EXIT_IF(ret);

			/* Connect to the server */
	ret = connect_db (cntx_ptr, &conn_ptr, EX_USERNAME, EX_PASSWORD );
		EXIT_IF(ret);
	
			/* Allocate a command structure */
	ret = ct_cmd_alloc (conn_ptr, &cmd_ptr );
		EXIT_IF(ret);

			/* Get a command and send it to the server */
	ret = send_sql (cmd_ptr);
		EXIT_IF(ret);

			/* Process results from the server */
	ret = handle_returns ( cmd_ptr );
		EXIT_IF(ret);

			/* Drop the command structure */
	ret = ct_cmd_drop (cmd_ptr );
		EXIT_IF(ret);

			/* Close the connection to the server */
	ret = ct_close ( conn_ptr, CS_UNUSED ) ;	
		EXIT_IF(ret);

			/* Deallocate context and do general cleanup */
	ret = cleanup_db (cntx_ptr, ret );
		EXIT_IF(ret);

	printf("\n End of program run! \n");
	exit(0);
}

CS_RETCODE 	init_db (cntx_ptr)
CS_CONTEXT	**cntx_ptr ;
{
	CS_RETCODE	retcode ;
	CS_INT		outlen; 
	CS_BYTE		buflen =10;

			/* allocate a context */
	retcode = cs_ctx_alloc (CS_VERSION_100,cntx_ptr );
		RETURN_IF ( retcode, "cs_ctx_alloc ");

			/* initialize the library */
	retcode = ct_init (*cntx_ptr, CS_VERSION_100 );
		RETURN_IF ( retcode, "ct_init ");

			 /* install the server message callback */
	retcode = ct_callback ( *cntx_ptr, NULL, CS_SET, CS_SERVERMSG_CB,
				(CS_VOID *)ctlib_server_msg_handler) ;
		RETURN_IF ( retcode, "ct_callback ");

			 /* install the client message callback */
	retcode = ct_callback (*cntx_ptr, NULL, CS_SET, CS_CLIENTMSG_CB,
				(CS_VOID *)ctlib_client_msg_handler);
		RETURN_IF ( retcode, "ct_callback: CLIENTMSG ");

	return retcode ;
}

CS_RETCODE 	cleanup_db ( cntx_ptr, status )
CS_CONTEXT	*cntx_ptr ;
CS_RETCODE	status ;
{
	CS_RETCODE	retcode ;
	CS_INT		exit_type ;

	exit_type = ( status != CS_SUCCEED ) ? CS_FORCE_EXIT : CS_UNUSED ;

		 /* close and cleanup connection to the server */
	retcode = ct_exit (cntx_ptr, exit_type );
		RETURN_IF ( retcode, "db_cleanup:ct_exit ");

		/* drop the context */
	retcode = cs_ctx_drop (cntx_ptr) ;
		RETURN_IF ( retcode, "db_cleanup:cs_drop ");

	return retcode ; 
}	

CS_RETCODE	connect_db (cntx_ptr, conn_ptr, user_name, password )
CS_CONTEXT	*cntx_ptr ;
CS_CONNECTION	**conn_ptr ;
CS_CHAR		*user_name, *password ;
{
	CS_RETCODE	retcode ;

		 /* Allocate a connection pointer */
	retcode = ct_con_alloc (cntx_ptr, conn_ptr );
		RETURN_IF ( retcode, "connect_db: ct_con_alloc ");

		 /* Set the username and password properties */
	retcode = ct_con_props ( *conn_ptr, CS_SET, CS_USERNAME, user_name,
					CS_NULLTERM, NULL );
		RETURN_IF ( retcode, "connect_db: ct_con_props: username ");

	retcode = ct_con_props ( *conn_ptr, CS_SET, CS_PASSWORD, password,
					CS_NULLTERM, NULL );
		RETURN_IF ( retcode, "connect_db: ct_con_props: password"); 

		 /* connect to the server */
	retcode = ct_connect ( *conn_ptr, NULL, 0 ) ;
		RETURN_IF ( retcode, "connect_db: ct_connect ") ;

	return  CS_SUCCEED ;
}


CS_RETCODE	send_sql (cmd_ptr)
CS_COMMAND	*cmd_ptr ;
{
	CS_RETCODE	retcode ;
	CS_DATAFMT	datafmt ;

		 /* Build and send the command to the server */
 	retcode = ct_command ( cmd_ptr, CS_LANG_CMD, "select getdate()",
				CS_NULLTERM, CS_UNUSED );
		RETURN_IF ( retcode, "ct_command ");

	retcode = ct_send ( cmd_ptr );
		RETURN_IF ( retcode, "ct_send ");

	return CS_SUCCEED ;
}

CS_RETCODE	handle_returns ( cmd_ptr )
CS_COMMAND	*cmd_ptr ;
{
	CS_RETCODE	results_ok  ;
	CS_INT		result_type ;

		 /* Process all returned result types */
	while (( results_ok = ct_results ( cmd_ptr, &result_type)) == CS_SUCCEED )
	{
		switch ((int)result_type)
		{
			case CS_ROW_RESULT:
					  printf("TYPE: ROW RESULT \n");
					  results_ok = bind_columns ( cmd_ptr );
						RETURN_IF ( results_ok, "bind columns");
		
					  results_ok = fetch_n_print ( cmd_ptr );
						RETURN_IF ( results_ok, "fetch_n_print");
					  break ;

			case CS_CMD_SUCCEED:	
					  printf("TYPE: CMD SUCCEEDED \n");
					  break ;

			case CS_CMD_DONE   :
					  printf("TYPE : CMD DONE \n");
				 	  break ;

			case CS_CMD_FAIL   :
					  printf("TYPE: CMD FAIL \n");
					  break ;

			case CS_PARAM_RESULT :
					  printf("TYPE: PARAM RESULT \n");
					  results_ok = bind_columns ( cmd_ptr );
						RETURN_IF ( results_ok, "bind columns");
		
					  results_ok = fetch_n_print ( cmd_ptr );
						RETURN_IF ( results_ok, "fetch_n_print");
					  break ;

			case CS_STATUS_RESULT :
					  printf("TYPE: STATUS RESULTS \n");
					  results_ok = bind_columns ( cmd_ptr );
						RETURN_IF ( results_ok, "bind columns");
		
					  results_ok = fetch_n_print ( cmd_ptr );
						RETURN_IF ( results_ok, "fetch_n_print");
					  break ;


			case CS_COMPUTE_RESULT :
					  printf("TYPE: COMPUTE RESULTS \n");
					  break ;

			default    :
					  RETURN_IF ( CS_FAIL, "unknown results \n");
					  break ;
		} ;
	}
	if ( results_ok == CS_END_RESULTS )
	 	return CS_SUCCEED ;
	return CS_FAIL ;
}

CS_RETCODE 	bind_columns (cmd_ptr )
CS_COMMAND	*cmd_ptr ;
{
	CS_RETCODE	retcode ;
	CS_INT		i , num_cols ;
	CS_DATAFMT	target_format ;

	retcode = ct_res_info ( cmd_ptr, CS_NUMDATA, &num_cols, CS_UNUSED, NULL) ;
		RETURN_IF ( retcode, "ct_bind : ct_res_info ");

	for ( i = 1 ; i <= num_cols ; i++ )
	{
		memset ( &target_format, 0, CS_SIZEOF(target_format)) ;

		target_format.datatype = CS_CHAR_TYPE ;
		target_format.maxlength = MAX_COLSIZE  ;
		target_format.count    = 1 ;
		target_format.format   = CS_FMT_NULLTERM ;

			 /* Bind returned data to host variables */
		retcode = ct_bind ( cmd_ptr, i, &target_format, rowbuffer[i-1],
					NULL, NULL ) ;

		RETURN_IF ( retcode, "bind_columns: ct_bind ");
	}
	return CS_SUCCEED ;
}

CS_RETCODE	fetch_n_print ( cmd_ptr )
CS_COMMAND	*cmd_ptr ;
{
	CS_RETCODE 	retcode ;
	CS_INT		len, i, num_cols ;
	CS_CHAR		types[20];
	
	
	retcode = ct_res_info ( cmd_ptr, CS_NUMDATA, &num_cols, CS_UNUSED, NULL );
		RETURN_IF ( retcode, "fetch_n_print: ct_res_info ");


		 /* Fetch the bound data into host variables */
	while (( (retcode = ct_fetch(cmd_ptr, CS_UNUSED, CS_UNUSED, CS_UNUSED,
				(CS_INT *)NULL)) == CS_SUCCEED )	
	||
	      ( retcode == CS_ROW_FAIL ))
	{
		if ( retcode == CS_ROW_FAIL )
		{
			printf("ct_fetch returned row fail \n");
			continue ;
		}
		for ( i = 1 ; i <= num_cols ; i++ )
		{
			printf(" %s \t ", rowbuffer[i-1] );
		}
		printf("\n");
	}

	if ( retcode != CS_END_DATA)
		RETURN_IF ( retcode, "fetch_n_print ") ;
	
	return CS_SUCCEED ;
}

CS_RETCODE set_locale(context)
CS_CONTEXT      *context;
{
	CS_LOCALE      	*locale;
        CS_RETCODE      retcode;
        CS_INT 		buflen, datebuf;
 
        /* Get a locale handle.  */
        retcode = cs_loc_alloc(context, &locale);
		RETURN_IF ( retcode, "setuplocale: cs_loc_alloc " );

	/* Set the new value for date the required date format. In this 
	** example, we set the format to be dd/mm/yy. Please refer to
	** cstypes.h for a complete list of date formats and their
	** corresponding defined values.
	*/
	datebuf = CS_DATES_DMY1;
	retcode = cs_dt_info(context, CS_SET, locale, CS_DT_CONVFMT,
	    CS_UNUSED, (CS_VOID *)&datebuf, sizeof(datebuf), &buflen); 
                RETURN_IF(retcode,"SetupLocale: cs_dt_info");

   	/* set context locale to the one we just defined */
        retcode = cs_config(context, CS_SET, CS_LOC_PROP, locale,
                        CS_UNUSED, NULL);
                RETURN_IF(retcode, "SetupLocale: cs_config(CS_LOC_PROP) ");

	/* Now retrieve the date format simply to ensure that we will be 
	** retrieving data in the format that we specified above. 
	** In this case, we expect CS_DATES_DMY1, which is defined in 
	** cstypes.h as being =  3. 
	*/

	/* Initialize the variables to 0. */
	datebuf = 0;
	buflen = 0;
	retcode = cs_dt_info(context, CS_GET, locale, CS_DT_CONVFMT,
		    CS_UNUSED, (CS_VOID *)&datebuf, sizeof(datebuf), &buflen); 
                RETURN_IF(retcode,"SetupLocale: cs_dt_info() ");

	printf("Date format has been set to be = %d, (dd/mm/yy)\n",datebuf);

	return CS_SUCCEED ;
}