Difference between revisions of "Library dblsamp"

/*#==================================================
 *# Copyright (C) 1988-2009 Recital Corporation Inc.
 *# As an unpublished licensed proprietary work.
 *# All rights reserved worldwide.
 *#
 *# This program may be freely copied and used as a template for user
 *# programs which make use of the Recital/Library in so long as the above
 *# copyright notice is included.
 *#
 #===================================================
 *
 *MODULE	: dblsamp.c
 *
 *PURPOSE	: Recital Database Library sample program.
 *
 *AUTHOR	: RECITAL CORPORATION
 * 
 *==================================================*/
 
#include <stdio.h>
#include "dbl.h"			/* Recital Library include file */
#include "dblproto.h" 		/* Recital Library prototype file */
 
extern int g_disable_txcount;
 
/*-----------------------------------------------------------------------------------------*/
/* Table structure for db to be constructed. */
/* Structure dBFIELD defined in dbl.h */
/*-----------------------------------------------------------------------------------------*/
static dBFIELD fields[7]
=
{
	"VESSEL", 'C', 18, 0, 0,
	"LAT", 'N', 4, 1, 0,
	"LONG", 'N', 4, 1, 0,
	"AMOUNT", 'N', 10, 0, 0,
	"DATE", 'D', 8, 0, 0,
	"FLAG", 'C', 9, 0, 0,
	"MEMO", 'M', 4, 0, 0
};
 
/*-----------------------------------------------------------------------------------------*/
/* Static Error Handling procedure. */
/*-----------------------------------------------------------------------------------------*/
static int errorproc();
 
/*-----------------------------------------------------------------------------------------*/
/* Table records to add. */
/*-----------------------------------------------------------------------------------------*/
static char
	*text_table[] = {
		"Santa Margarita   80.027.5   700000095/01/01Spanish  ",
		"Santa Rosa        81.824.8  3000000032/01/01Spanish  ",
		"Unknown galleon   83.123.0         015/01/01Spanish  ",
		"Jessie            97.127.4    10000075/01/01U.S.     ",
		"Lea               96.227.8   100000080/01/01U.S.     ",
		"S.J. Lee          96.926.9    20000075/01/01U.S.     ",
		"Genovase          78.418.4   185000030/01/01Spanish  ",
		"Unknown Vessel    77.517.9         075/01/01U.S.     "
 };
 
/*-----------------------------------------------------------------------------------------*/
/* Main program entry point. */
/*-----------------------------------------------------------------------------------------*/
main() 
{
	int			rc;				/* Return Code for error handling */
	char			*dbf;				/* File descriptor for table */
	char			*dbx;			/* File descriptor for tagged index */
	char			*ndx;			/* File descriptor for index */
	char			*dbt;				/* File descriptor for memo file */
	char			record[58];			/* Array of char for records */
	char			keytype;			/* Variable for varying keytype */
	char			key[21];			/* Storage location for keys */
	char			tagname[21];		/* Storage location for tag name */
	char			keyexpr[512];		/* Storage location for key expr */
	char			forexpr[512];		/* Storage location for for expr */
	int			kexprlen;			/* The key expression length */
	int			keylen;			/* The key length */
	dBFIELD		dbfields[128];		/* Storage location for field names */
	FLDNUM		fieldcount;			/* Number of fields to create */
	int			fldpos[128];		/* Fields position buffer */
	char			flddes[128][26];		/* Fields description buffer */
	char			tmpbuf[81];		/* Temporary storage buffer */
	char			fldbuf[128][256];	/* Field buffer (recin()/out()) */
	char			nextkey[10][20];	/* Key buffers (dbnkey()) */
	char			status;			/* Deleted record flag */
	long			recno;			/* Table record variable */
	long			rec_no[10];		/* Record number array (dbnkey()) */
	long			db_size;			/* Size of table variable */
	int			reclen;			/* Table record length variable */
	char			month;			/* Month variable */
	char			day;				/* Day variable */
	char			year;				/* Year variable */
	FLDNUM		nofields;			/* Number of table fields variable */
	int			i;		 		/* Loop control variable */
	double		n;				/* Double numeric variable */
	int			keyunique;			/* Boolean for unique tag key */
	int			keydescend;		/* Boolean for descending tag key */
	int			notags;			/* number of tags in a dbx file */
 
	/*---------------------------------------------------------------------------------------*/
	/* Perform operational Library environment functions. */
	/*---------------------------------------------------------------------------------------*/
 
	/*---------------------------------------------------------------------------------------*/
	/* DBDCACHE() - this example allocates a 100 record caching area */
	/*---------------------------------------------------------------------------------------*/
	rc = dbdcache(100);
	errorproc("dbdcache()", "table cache specified.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBICACHE() - this example allocates 51200 bytes for index caching */
	/*---------------------------------------------------------------------------------------*/
	rc = dbicache(100);
	errorproc("dbicache()", "index cache specified.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBFILEMODE() - shared, read write access */
	/*---------------------------------------------------------------------------------------*/
	rc = dbfilemode(1, 0);
	errorproc("dbfilemode()", "file mode specified.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBSET() - Set exact index match to true */
	/*---------------------------------------------------------------------------------------*/
	rc = dbset("EXACT", 1);
	errorproc("dbset()", "filemode specified.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* Perform basic table functions. */
	/*---------------------------------------------------------------------------------------*/
	fieldcount = 7; /* Number of Fields */
 
	/*---------------------------------------------------------------------------------------*/
	/* DBCREAT() - this example creates a table according to the 'dBFIELD' */
	/* array fields. */
	/*---------------------------------------------------------------------------------------*/
	rc = dbcreat("shipwreck.dbf", fieldcount, fields);
	errorproc("dbcreat()", "database created.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBCREATX() - Enables the addition of table field descriptions. */
	/*---------------------------------------------------------------------------------------*/
	strcpy(flddes[0], "The vessel's name.");
	strcpy(flddes[1], "The latitude.");
	strcpy(flddes[2], "The longitude.");
	strcpy(flddes[3], "The value.");
	strcpy(flddes[4], "The date.");
	strcpy(flddes[5], "The vessel's flag.");
	strcpy(flddes[6], "Notes.");
 
	rc = dbcreatx("shipwreck.dbf", fieldcount, fields, flddes);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBOPEN() - example opens table 'shipwreck.dbf' returning the table */
	/* file descriptor (dbf) used in upcoming functions */
	/*---------------------------------------------------------------------------------------*/
	rc = dbopen("shipwreck.dbf", &dbf);
	errorproc("dbopen()", "table opened.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBGETF() - obtain table information on the table referenced by the */
	/* 'dbf' file descriptor. */
	/*---------------------------------------------------------------------------------------*/
	rc = dbgetf(dbf, &reclen, &month, &day, &year, &nofields, dbfields);
	errorproc("dbgetf()", "information retrieved.", rc);
	printf("\t\tRecord length in bytes: %d\n", reclen);
	printf("\t\tCreation date: \t\t%d/%d/%d\n", month, day, year);
	printf("\t\tNumber of fields: \t%d\n", nofields);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBGETFX() - obtain extended table information including the numeric */
	/* field location array (fldpos) and the field descriptions (flddes). */
	/*---------------------------------------------------------------------------------------*/
	rc = dbgetfx(dbf, &reclen, &month, &day, &year, &nofields, dbfields,
			fldpos, flddes);
	errorproc("dbgetfx()", "extra information retrieved.", rc);
	printf("\t\tLocation of fields in buffer: \t%d,%d,%d,%d,%d,%d\n",
			fldpos[1], fldpos[2], fldpos[3], fldpos[4], fldpos[5], fldpos[6]);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBLOCKF() - locks the table for the additions that follow. */
	/* Synonymous with DBTLOCKF(), which tests the lock */
	/*---------------------------------------------------------------------------------------*/
	rc = dblockf(dbf);
	if (rc == SUCCESS) {
		printf("Function: \tdblockf() \tfile locked successfully.\n");
	} else {
		printf("Lock Failed. tError: %d\n", rc);
	}
 
	/*---------------------------------------------------------------------------------------*/
	/* DBCLOSE() - close the active table */
	/*---------------------------------------------------------------------------------------*/
	rc = dbclose(dbf);
	errorproc("dbclose()", "table closed.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* Exclusive read write access of the table is required to create or delete */
	/* tags. */
	/*---------------------------------------------------------------------------------------*/
	rc = dbfilemode(0, 0);
	rc = dbopen("shipwreck.dbf", &dbf);
	errorproc("dbopen()", "table opened in exclusive mode.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* Perform basic tagged index functions. */
	/*---------------------------------------------------------------------------------------*/
 
	/*---------------------------------------------------------------------------------------*/
	/* DBXCREATE() - in this example creates a tag on field VESSEL */
	/*---------------------------------------------------------------------------------------*/
	rc = dbxcreate(dbf,
		fields[0].fieldnm, 	/* "VESSEL",	*/
		&dbx,
		fields[0].fieldnm,	/* "VESSEL",	*/
		NULL,
		0,
		0);
	errorproc("dbxcreate()", "tag created", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBXCREATE() - in this example creates a tag on field FLAG */
	/*---------------------------------------------------------------------------------------*/
	rc = dbxcreate(dbf,
		fields[5].fieldnm,	/* "FLAG",	  */
		&dbx,
		fields[5].fieldnm,	/* "FLAG",	  */
		NULL,
		0,
		0);
	errorproc("dbxcreate()", "tag created", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBXNOTAGS() - obtains the number of tagged indexes */
	/*---------------------------------------------------------------------------------------*/
	rc = dbxnotags(dbx, &notags);
	errorproc("dbxnotags()", "tagged index count obtained.", rc);
	printf("\t		 Key count: \t%d\n", notags);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBXKEXPR() - obtains tagged index information */
	/*---------------------------------------------------------------------------------------*/
	for (i = 1; i <= notags; i++) {
		rc = dbxkexpr(dbx,
			&i,
			tagname,
			&keytype,
			keyexpr,
			forexpr,
			&kexprlen,
			&keylen,
			&keyunique,
			&keydescend);
		errorproc("dbxkexpr()", "key information retrieved.", rc);
		printf("\t		Key number: \t%d\n", i);
		printf("\t		Key name: \t%s\n", tagname);
		printf("\t		Key type: \t%c\n", keytype);
		printf("\t		Key expression: %s\n", keyexpr);
		printf("\t		Key length: %d   Expression length: %d\n",
					kexprlen,
					keylen);
		printf("\t		For expression: %s\n", forexpr);
		printf("\t		Key unique: \t%s\n", keyunique ? "Yes" : "No");
		printf("\t		Key descending: \t%s\n", keydescend ? "Yes" : "No");
	}
 
	/*---------------------------------------------------------------------------------------*/
	/* DBXDROPTAGS() - Drop the specified tag */
	/*---------------------------------------------------------------------------------------*/
	rc = dbxdroptag(dbx, fields[5].fieldnm);
	errorproc("dbxdroptag()", "tagged index 'FLAG' dropped.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBXCLOSE() - close the active tagged index */
	/*---------------------------------------------------------------------------------------*/
	rc = dbxclose(dbx);
	errorproc("dbxclose()", "tagged index closed.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBCLOSE() - close the active table */
	/*---------------------------------------------------------------------------------------*/
	rc = dbclose(dbf);
	errorproc("dbclose()", "table closed.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* Reopen the table in shared, read-write access mode */
	/*---------------------------------------------------------------------------------------*/
	rc = dbfilemode(1, 0);
	rc = dbopen("shipwreck.dbf", &dbf);
	errorproc("dbopen()", "table opened in shared mode.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBXOPEN() - example opens index file 'shipwreck.dbx' returning the */
	/* tagged index file descriptor (dbx) used in upcoming functions */
	/*---------------------------------------------------------------------------------------*/
	rc = dbxopen(dbf, "shipwreck.dbx", &dbx);
	errorproc("dbxopen()", "tagged index opened.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* Perform basic index functions. */
	/*---------------------------------------------------------------------------------------*/
 
	/*---------------------------------------------------------------------------------------*/
	/* DBICREAT() - in this example creates an index on field VESSEL */
	/*---------------------------------------------------------------------------------------*/
	rc = dbicreat("shipwreck.ndx", fields[0].fieldnm, 18, 'C');
	errorproc("dbicreat()", "index created", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBIOPEN() - opens index to active status */
	/*---------------------------------------------------------------------------------------*/
	rc = dbiopen("shipwreck.ndx", &ndx);
	errorproc("dbiopen()", "index opened.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBKEXPR() - obtains index information */
	/*---------------------------------------------------------------------------------------*/
	rc = dbkexpr(ndx, &keytype, keyexpr, &kexprlen, &keylen);
	errorproc("dbkexpr()", "key information retrieved.", rc);
	printf("\t	Key type: \t%c\n", keytype);
	printf("\t	Key expression: %s\n", keyexpr);
	printf("\t	Key length: %d   Expression length: %d\n",
			kexprlen, keylen);
 
	/*---------------------------------------------------------------------------------------*/
	/* Lock data file */
	/*---------------------------------------------------------------------------------------*/
	rc = dblockf(dbf);
	if (rc == SUCCESS) {
		printf("Function: \tdblockf() \tfile locked successfully.\n");
	} else {
		printf("Lock Failed. \tError: %d\n", rc);
	}
 
	/*---------------------------------------------------------------------------------------*/
	/* DBLOCKI() - locks the index for following additions */
	/* Synonymous with DBTLOCKI() which tests the lock */
	/*---------------------------------------------------------------------------------------*/
	rc = dblocki(ndx);
	if (rc == SUCCESS) {
		printf("Function: \tdblocki() \tindex locked successfully.\n");
	} else {
		printf("Lock Failed. tError: %d\n", rc);
	}
 
	/*---------------------------------------------------------------------------------------*/
	/* Perform basic memo file functions. */
	/*---------------------------------------------------------------------------------------*/
 
	/*---------------------------------------------------------------------------------------*/
	/* DBMCREAT() - creates a table memo file (if one needs creating) */
	/*---------------------------------------------------------------------------------------*/
	rc = dbmcreat("shipwreck.dbt");
	errorproc("dbmcreat()", "memo file create", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBMOPEN() - opens an associated memo file */
	/*---------------------------------------------------------------------------------------*/
	rc = dbmopen("shipwreck.dbt", &dbt);
	errorproc("dbmopen()", "memo file open.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* Perform table input functions. */
	/*---------------------------------------------------------------------------------------*/
 
	/*---------------------------------------------------------------------------------------*/
	/* DBAPPEND() - appends a record to the end of the active table */
	/*---------------------------------------------------------------------------------------*/
	rc = dbappend(dbf, text_table[0], &recno);
	errorproc("dbappend()", "record appended.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBAKEY() - adds a key to the active index after dbappend() */
	/*---------------------------------------------------------------------------------------*/
	rc = dbakey(ndx, "Santa Margarita   ", recno);
	errorproc("dbakey()", "key added.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBXAKEY() - adds a key to the tagged index after dbappend() */
	/* The tagged index file must be lock first */
	/*---------------------------------------------------------------------------------------*/
	rc = dbxlocki(dbx);
	errorproc("dbxlocki()", "tagged index file locked.", rc);
	rc = dbxakey(dbx, recno);
	errorproc("dbxakey()", "key added.", rc);
	rc = dbxunlocki(dbx);
	errorproc("dbxunlocki()", "tagged index file unlocked.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBFLUSH() - flushes the record cache to disk */
	/*---------------------------------------------------------------------------------------*/
	rc = dbflush(dbf);
	errorproc("dbflush()", "table cache flushed.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBIFLSH() - flushes the index cache to disk */
	/*---------------------------------------------------------------------------------------*/
	rc = dbiflsh(ndx);
	errorproc("dbiflsh()", "index cache flushed.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBXFLSH() - flushes the tagged index cache to disk */
	/*---------------------------------------------------------------------------------------*/
	rc = dbxflsh(dbx);
	errorproc("dbxflsh()", "Tagged index cache flushed.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBGETR() - retrieves a record */
	/*---------------------------------------------------------------------------------------*/
	rc = dbgetr(dbf, (long) 1, record, &status);
	errorproc("dbgetr()", "record retrieved.", rc);
	printf("\t\t%s\n", record);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBPUTM() - put the memo information */
	/*---------------------------------------------------------------------------------------*/
	rc = dbputm(dbt, "128' 30% coral cover.", &record[53]);
	errorproc("dbputm", "memo placed in buffer", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBUPDR() - updates the record in buffer 'record' */
	/* As of v8.0 this function automatically updates any attached indexes. */
	/*---------------------------------------------------------------------------------------*/
	rc = dbupdr(dbf, (long) 1, record);
	errorproc("dbupdr()", "record updated.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBGETM() - this example extracts the memo from the record buffer */
	/*---------------------------------------------------------------------------------------*/
	rc = dbgetm(dbt, &record[53], tmpbuf, 0);
	errorproc("dbgetm()", "retrieved memo.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBUPDM() - Updates the memo field for this record */
	/*---------------------------------------------------------------------------------------*/
	strcat(tmpbuf, " Appending this string to the end of memo...");
	rc = dbupdm(dbt, tmpbuf, &record[53], &record[53]);
	errorproc("dbupdm()", "updated memo.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBPUTRK() - the following example adds a record and index */
	/* to the respective files. */
	/* DBRECOUT() - scatter the record stored in buffer 'record' to a two */
	/* dimensional character array 'fldbuf' */
	/*---------------------------------------------------------------------------------------*/
 
	/*---------------------------------------------------------------------------------------*/
	/* Read in 6 more records */
	/*---------------------------------------------------------------------------------------*/
 
	for (i = 1; i <= 6; i++) {
		dbrecout(dbf, dbfields, fldpos, text_table[i], fldbuf);
		rc = dbputrk(dbf, ndx, fldbuf[0], text_table[i]);
		errorproc("dbputrk()", "record placed by key.", rc);
	}
	errorproc("dbputrk()", "6 records placed by key.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBFLUSH() - flushes the record cache to disk */
	/*---------------------------------------------------------------------------------------*/
	rc = dbflush(dbf);
	errorproc("dbflush()", "table cache flushed.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBIFLSH() - flushes the index cache to disk */
	/*---------------------------------------------------------------------------------------*/
	rc = dbiflsh(ndx);
	errorproc("dbiflsh()", "index cache flushed.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBXFLSH() - flushes the tagged index cache to disk */
	/*---------------------------------------------------------------------------------------*/
	rc = dbxflsh(dbx);
	errorproc("dbxflsh()", "Tagged index cache flushed.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBFIELD() - this example extracts the field 'VESSEL' from the */
	/* record (#5) stored in buffer 'record' */
	/*---------------------------------------------------------------------------------------*/
	rc = dbgetr(dbf, (long) 5, record, &status);
	/* rc = dbfield( dbf, record, "FLAG", tmpbuf); */
	rc = dbfield(dbf, record, fields[5].fieldnm, tmpbuf);
	errorproc("dbfield()", "field extracted.", rc);
	printf("\t\tFlag: \t%s\n", tmpbuf);
 
	/*---------------------------------------------------------------------------------------*/
	/* Modify a single field in record number 5 */
	/*---------------------------------------------------------------------------------------*/
 
	/*---------------------------------------------------------------------------------------*/
	/* DBSCATTER() - scatter the record into specified field buffers */
	/*---------------------------------------------------------------------------------------*/
	rc = dbscatter(dbf, record, fldbuf);
	errorproc("dbscatter()", "record scattered.", rc);
 
	for (i = 0; i < nofields; i++) {
		fprintf(stdout, "\t\tfldbuf[%d]='%s'\n", i, fldbuf[i]);
	}
	strcpy(fldbuf[5], "Spanish"); /* Modify Field */
 
	/*---------------------------------------------------------------------------------------*/
	/* DBGATHER() - gather the field buffers and place the contents */
	/*---------------------------------------------------------------------------------------*/
	rc = dbgather(dbf, record, fldbuf);
	errorproc("dbgather()", "record gathered.", rc);
	printf("\t\t%s\n", record);
 
	rc = dbupdr(dbf, (long) 5, record); /* Finish Example */
	errorproc("dbupdr()", "record updated.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* Perform index / index conversion functions. */
	/*---------------------------------------------------------------------------------------*/
 
	/*---------------------------------------------------------------------------------------*/
	/* DBREWIND() - position the record pointer to the top of the index file */
	/*---------------------------------------------------------------------------------------*/
	rc = dbrewind(ndx);
	errorproc("dbrewind()", "index rewound.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBGETNR() - after 'rewinding' to the top of the table, the first record */
	/* can be retrieved with dbgetnr() using the active key */
	/*---------------------------------------------------------------------------------------*/
	for (i = 1; i <= 6; i++) {
		rc = dbgetnr(dbf, ndx, record, &status);
		printf("\t\t%d: %s\n", i, record);
	}
	errorproc("dbgetnr()", "6 records retrieved by key.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBNKEY() - get next key */
	/*---------------------------------------------------------------------------------------*/
	rc = dbnkey(ndx, nextkey[0], rec_no);
	errorproc("dbnkey()", "next key retrieved.", rc);
	printf("\t\tnext key: \t%s\n", nextkey[0]);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBFWD() - position the pointer to the end of the table */
	/*---------------------------------------------------------------------------------------*/
	rc = dbfwd(ndx);
	errorproc("dbfwd()", "index pointer placed at bottom.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBPKEY() - get previous key */
	/*---------------------------------------------------------------------------------------*/
	rc = dbpkey(ndx, nextkey[0], rec_no);
	errorproc("dbpkey()", "previous key found.", rc);
	printf("\t\tprev key: \t%s\n", nextkey[0]);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBGETPR() - obtain the previous record by key */
	/*---------------------------------------------------------------------------------------*/
	rc = dbgetpr(dbf, ndx, record, &status);
	errorproc("dbgetpr()", "previous record (by key) retrieved.", rc);
	printf("Previous: \t%s\n", record);
 
	/*---------------------------------------------------------------------------------------*/
	/* Rewind the index */
	/*---------------------------------------------------------------------------------------*/
	dbrewind(ndx);
 
	/*---------------------------------------------------------------------------------------*/
	/* Perform table retrieval functions using indexes. */
	/*---------------------------------------------------------------------------------------*/
 
	/*---------------------------------------------------------------------------------------*/
	/* DBTKEY() - translates supplied key to record number */
	/*---------------------------------------------------------------------------------------*/
	rc = dbtkey(ndx, "Santa Rosa	  ", &recno);
	errorproc("dbtkey()", "record number found by key.", rc);
	printf("\t\trecord number: \t%d\n", recno);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBGETRK() - obtains the record from the specified key */
	/*---------------------------------------------------------------------------------------*/
	rc = dbgetrk(dbf, ndx, "Santa Rosa		", record, &status);
	errorproc("dbgetrk()", "record retrieved by key.", rc);
	printf("\t\t%s\n", record);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBCKEY() - read the current key */
	/*---------------------------------------------------------------------------------------*/
	rc = dbckey(ndx, key, &recno);
	errorproc("dbckey()", "current key read.", rc);
	printf("\t\tcurrent key: \t%s\n", key);
 
	/*---------------------------------------------------------------------------------------*/
	/* Perform tagged index functions. */
	/*---------------------------------------------------------------------------------------*/
 
	/*---------------------------------------------------------------------------------------*/
	/* DBXREWIND() - position the pointer to the top of the index file */
	/*---------------------------------------------------------------------------------------*/
	rc = dbxrewind(dbx);
	errorproc("dbxrewind()", "Tagged index rewound.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBXGETNR() - after 'rewinding' to the top of the table, the first record */
	/* can be retrieved with dbgetnr() using the active key */
	/*---------------------------------------------------------------------------------------*/
	for (i = 1; i <= 6; i++) {
		rc = dbxgetnr(dbf, dbx, record, &status);
		printf("\t\t%d: %s\n", i, record);
	}
	errorproc("dbxgetnr()", "6 records retrieved by tag key.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBXNKEY() - get next key */
	/*---------------------------------------------------------------------------------------*/
	rc = dbxnkey(dbx, nextkey[0], rec_no);
	errorproc("dbxnkey()", "next key retrieved in tagged index.", rc);
	printf("\t\tnext key: \t%s\n", nextkey[0]);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBXFWD() - position the pointer to the end of the table */
	/*---------------------------------------------------------------------------------------*/
	rc = dbxfwd(dbx);
	errorproc("dbxfwd()", "index pointer placed at bottom.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBXPKEY() - get previous key */
	/*---------------------------------------------------------------------------------------*/
	rc = dbxpkey(dbx, nextkey[0], rec_no);
	errorproc("dbxpkey()", "previous key found in tagged index.", rc);
	printf("\t\tprev key: \t%s\n", nextkey[0]);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBXGETPR() - obtain the previous record by key */
	/*---------------------------------------------------------------------------------------*/
	rc = dbxgetpr(dbf, dbx, record, &status);
	errorproc("dbxgetpr()", "previous record (by key) retrieved.", rc);
	printf("Previous: \t%s\n", record);
 
	/*---------------------------------------------------------------------------------------*/
	/* Rewind the index */
	/*---------------------------------------------------------------------------------------*/
	dbxrewind(dbx);
 
	/*---------------------------------------------------------------------------------------*/
	/* Perform table retrieval functions using tagged indexes.*/
	/*---------------------------------------------------------------------------------------*/
 
	/*---------------------------------------------------------------------------------------*/
	/* DBTKEY() - translates supplied key to record number */
	/*---------------------------------------------------------------------------------------*/
	rc = dbtkey(ndx, "Santa Rosa	  ", &recno);
	errorproc("dbtkey()", "record number found by key.", rc);
	printf("\t\trecord number: \t%d\n", recno);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBXGETRK() - obtains the record from the specified key */
	/*---------------------------------------------------------------------------------------*/
	rc = dbxgetrk(dbf, dbx, "Santa Rosa	   ", record, &status);
	errorproc("dbxgetrk()", "record retrieved by key.", rc);
	printf("\t\t%s\n", record);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBXCKEY() - read the current key */
	/*---------------------------------------------------------------------------------------*/
	rc = dbxckey(dbx, key, &recno);
	errorproc("dbxckey()", "current key read.", rc);
	printf("\t\tcurrent key: \t%s\n", key);
 
	/*---------------------------------------------------------------------------------------*/
	/* Perform field level functions including index/ASCII functions. */
	/*---------------------------------------------------------------------------------------*/
 
	/*---------------------------------------------------------------------------------------*/
	/* DBATOFLD() - converts ASCII string to Recital field */
	/*---------------------------------------------------------------------------------------*/
	rc = dbatofld("23.3", 4, 1, tmpbuf);
	errorproc("dbatofld()", "string converted.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBATOKEY() - converts a ASCII string to Recital date key */
	/*---------------------------------------------------------------------------------------*/
	key[0] = 'D';
	rc = dbatokey("16430411", key);
	errorproc("dbatokey()", "string converted to key.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBFLDTOA() - converts extracted field to ASCII */
	/*---------------------------------------------------------------------------------------*/
	rc = dbfldtoa(record + 18, 4, tmpbuf);
	errorproc("dbfldtoa()", "field converted.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBSTRCPY() - formats character strings to Recital types */
	/*---------------------------------------------------------------------------------------*/
	dbstrcpy(key, 'L', 10, "  320000");
	printf("Function: \tdbstrcpy() \toutput: %s\n", key);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBSTRING() - formats non-'C' strings to C strings (null term) */
	/*---------------------------------------------------------------------------------------*/
	dbstring("Santa Pedro", 13, tmpbuf);
	printf("Function: \tdbstring() \toutput: %s\n", tmpbuf);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBKEYTOA() - converts an extracted key to ASCII */
	/*---------------------------------------------------------------------------------------*/
	tmpbuf[0] = 0; /* Number of decimal places */
	tmpbuf[1] = 'N'; /* Key Type */
	rc = dbkeytoa(key, tmpbuf);
	errorproc("dbkeytoa()", "key converted.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* Perform record/index deletion and file access */
	/*---------------------------------------------------------------------------------------*/
 
	/*---------------------------------------------------------------------------------------*/
	/* DBSIZE() - retrieve the size of the table */
	/*---------------------------------------------------------------------------------------*/
	rc = dbsize(dbf, &db_size);
	errorproc("dbsize()", "size retrieved.", rc);
	printf("\t		 No. of Records: \t%d\n", db_size);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBPUTR() - adds a record to the end of the table */
	/* You can also 'insert' a record using this function */
	/*---------------------------------------------------------------------------------------*/
	rc = dbputr(dbf, db_size + 1L, text_table[7]);
	errorproc("dbputr()", "record placed.", rc);
	rc = dbakey(ndx, "Unknown Vessel	", db_size + 1L);
	errorproc("dbakey()", "key added.", rc);
	/*---------------------------------------------------------------------------------------*/
	/* Add record to the Production Index as well */
	/*---------------------------------------------------------------------------------------*/
	rc = dbxakey(dbx, db_size + 1L);
	errorproc("dbxakey()", "key added.", rc);
 
	dbflush(dbf);
	dbiflsh(ndx);
	dbxflsh(dbx);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBDELETE() - mark a record (number 8) for deletion */
	/*---------------------------------------------------------------------------------------*/
	rc = dbdelete(dbf, 8L);
	errorproc("dbdelete()", "record 8 marked for deletion.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBRECALL() - recall a record marked for deletion (number 8) */
	/*---------------------------------------------------------------------------------------*/
	rc = dbrecall(dbf, 8L);
	errorproc("dbrecall()", "record 8 recalled.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBRMVKEY() - physically remove a key.  As of v8.0, this function */
	/* is not permitted on tables opened shareable. */
	/*---------------------------------------------------------------------------------------*/
	/* rc = dbrmvkey(ndx, "Unknown Vessel	", db_size+1L); */
	/* errorproc("dbrmvkey()", "key physically removed.", rc); */
 
	/*---------------------------------------------------------------------------------------*/
	/* DBRMVR() - physically remove a data record. As of v8.0 this */
	/* function is not permitted on tables opened shareable. */
	/*---------------------------------------------------------------------------------------*/
	/* rc = dbrmvr(dbf, db_size+1L); */
	/* errorproc("dbrmvr()", "record 7 physically removed.", rc); */
 
	/*---------------------------------------------------------------------------------------*/
	/* DBUNLOCKF() - unlocks a table file */
	/*---------------------------------------------------------------------------------------*/
	rc = dbunlockf(dbf);
	if (rc == SUCCESS) {
		printf("Function: \tdbunlockf() \tFile unlocked successfully\n");
	} else {
		printf("Unlock Failed. \tError: %d\n", rc);
	}
 
	/*---------------------------------------------------------------------------------------*/
	/* DBUNLOCKI() - unlocks an index file */
	/*---------------------------------------------------------------------------------------*/
	rc = dbunlocki(ndx);
	if (rc == SUCCESS) {
		printf("Function: \tdbunlocki() \tFile unlocked successfully\n");
	} else {
		printf("Unlock Failed. \tError: %d\n", rc);
	}
 
	/*---------------------------------------------------------------------------------------*/
	/* DBLOCKR() - tests available record locking in a multi user */
	/* environment.  Same as DBTLOCKR() in multi access */
	/*---------------------------------------------------------------------------------------*/
	rc = dblockr(dbf, (long) 7);
	if (rc == SUCCESS) {
		printf("Function: \tdblockr() \trecord locked successfully.\n");
	} else {
		printf("Lock Failed. tError: %d\n", rc);
	}
 
	/*---------------------------------------------------------------------------------------*/
	/* DBUNLOCKR() - unlocks a table Record */
	/*---------------------------------------------------------------------------------------*/
	rc = dbunlockr(dbf, (long) 7);
	if (rc == SUCCESS) {
		printf("Function \tdbunlockr(): \trecord unlocked successfully\n");
	} else {
		printf("Unlock Failed. \tError: %d\n", rc);
	}
 
	/*---------------------------------------------------------------------------------------*/
	/* Perform record/index close functions */
	/*---------------------------------------------------------------------------------------*/
 
	/*---------------------------------------------------------------------------------------*/
	/* DBICLOSE() - close the active index */
	/*---------------------------------------------------------------------------------------*/
	rc = dbiclose(ndx);
	errorproc("dbiclose()", "index closed.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBXCLOSE() - close the active tagged index */
	/*---------------------------------------------------------------------------------------*/
	rc = dbxclose(dbx);
	errorproc("dbxclose()", "tagged index closed.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBCLOSE() - close the active table */
	/*---------------------------------------------------------------------------------------*/
	rc = dbclose(dbf);
	errorproc("dbclose()", "table closed.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* DBMCLOSE() - close the active memo table */
	/*---------------------------------------------------------------------------------------*/
	rc = dbmclose(dbt);
	errorproc("dbmclose()", "memo table closed.", rc);
 
	/*---------------------------------------------------------------------------------------*/
	/* Perform miscellaneous Recital/Library functions */
	/*---------------------------------------------------------------------------------------*/
 
	/*---------------------------------------------------------------------------------------*/
	/* DBONERROR() - enables/disables (1/0) recovery from errors */
	/*---------------------------------------------------------------------------------------*/
	dbonerror(0); /* Recovery disabled */
	printf("Function: \tdbonerror()  \terror checking disabled\n");
 
	printf("\nEnd of Recital C Library test program....\n");
 
	exit(0);
 
}
 
/*-----------------------------------------------------------------------------------------*/
/* This procedure handles the return codes from called RECITAL/library */
/* functions.  Intended to eliminate cryptic  'if...else...' statements */
/* following library calls. */
/*-----------------------------------------------------------------------------------------*/
 
static int errorproc(func, str, rc)
	char *func;char *str;int rc; {
	if (rc != SUCCESS) {
		printf("\n  Error performing function %s -> %d\n", func, rc);
		exit(1);
	}
	printf("Function: \t%s, \t%s - Ok\n", func, str);
	return;
}