Difference between revisions of "Dbfield()"

Latest revision as of 16:05, 3 April 2009

PURPOSE

extract the value of a specified field

SYNOPSIS

#include<dbl.h>
 
	int	dbfield(dbf, record, name, buffer)
 
	<input parameter>
	char	*dbf;		/* .DBF file descriptor */
	char	*record;	/* Address of the buffer where the record is stored */
	char	*name;	/* The field name */
 
	<output parameters>
	char	*buffer;	/* Address of the buffer where the field value is stored as ASCII */

RETURN VALUE

The dbfield() function returns 0 for success or < 0 if an error occurs. See the section on return code values for a detailed list of return codes.

DESCRIPTION

The dbfield() function extracts the values of the specified field "name" from the given "record" buffer and places the ASCII value in the specified "buffer". The dbgetf() function can be used to obtain the field names for a database.

EXAMPLE

The following example extracts the value from the field "char *name" from the record buffer "char *record" whose file descriptor is in "char *dbf" and stores it in "char *fldvalue" as an ASCII string.

#include "dbl.h"
 
	char	*dbf;			/* .DBF file descriptor */
	char	record[1000];	/* Record buffer */
	char	name[10];		/* Name buffer */
	char	fldvalue[10];	/* Field value */
	int	rc;			/* Return code */
 
	rc = dbfield ( dbf, record, name, fldvalue);
	if (rc != SUCCESS){
		printf("error no %d \n". rc);
		exit(1);
	}
	else printf("Value of field %s is %s\n", name, fldvalue);

SEE ALSO

dbatofld(), dbgather(), dbgetf(), dbputr(), dbscatter()