Difference between revisions of "Library dblsamp"
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| + | The following program is written in 'C' as an example program using the RECITAL/Library functions. This file is stored in the SDK dbl sub-directory and is called "dblsamp.c". | ||
| + | |||
| + | <code lang="c"> | ||
/*#============================================================================ | /*#============================================================================ | ||
*# Copyright (C) 1988-1991 Recital Corporation Inc. | *# Copyright (C) 1988-1991 Recital Corporation Inc. | ||
| Line 887: | Line 890: | ||
return; | return; | ||
} | } | ||
| + | </code> | ||
Revision as of 13:52, 6 May 2009
The following program is written in 'C' as an example program using the RECITAL/Library functions. This file is stored in the SDK dbl sub-directory and is called "dblsamp.c".
/*#============================================================================ *# Copyright (C) 1988-1991 Recital Corporation Inc. *# As an unpublished licenced proprietary work.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 * * DATE : 26 Jan 91 * REVISION : 29 Oct 91 * REVISION : 09 May 95 * *==========================================================================*/ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/types.h> #include <unistd.h> #include "dbl.h" /* Recital/Library include file */ #include "dblproto.h" /* Recital/Library prototype file */ extern int g_disable_iostats; /*----------------------------------------------*/ /* 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', sizeof(MEMO), 0, 0 }; #define DB_RECORD_SIZE 100 /*----------------------------------------------*/ /* Static Error Handling procedure. */ /*----------------------------------------------*/ static void errorproc( char *func, char *str, int rc); /*----------------------------------------------*/ /* 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[DB_RECORD_SIZE]; /* 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[MAX_RECORD_FIELDS]; /* Storage location for fld names */ FLDNUM fieldcount; /* Number of fields to create */ int fldpos[MAX_RECORD_FIELDS]; /* Fields position buffer */ char flddes[MAX_RECORD_FIELDS][26]; /* Fields description buffer */ char tmpbuf[81]; /* Temporary storage buffer */ char fldbuf[MAX_RECORD_FIELDS][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 var */ int i; /* Loop control variable */ double n; /* Double numeric variable */ int keyunique; /* Boolean for unqiue 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()", "filemode 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()","datebase 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 funcs */ /*----------------------------------------------------------------*/ 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 following additions. */ /* Synonomous 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 an 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 an 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, ¬ags); 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 tag index 'shipwreck.dbx' returning the */ /* taged index file descriptor (dbx) used in upcoming funcs */ /*--------------------------------------------------------------------*/ 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 */ /* Synonomous 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 retreived.", 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()", "retreived memo.", rc); /*--------------------------------------------------*/ /* DBUPDM() - Updates the memofield 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 */ /* 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() - scatters the record into specified field buffers.*/ /*----------------------------------------------------------------*/ rc = dbscatter(dbf, record, fldbuf); errorproc("dbscatter()", "record scattered.", rc); strcpy(fldbuf[6], "Spanish"); /* Modify Field */ /*----------------------------------------------------------------*/ /* DBGATHER() - Gathers the field buffers and places 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() - positions the record pointer to the top of the */ /* index file */ /*-------------------------------------------------------------*/ rc = dbrewind(ndx); errorproc("dbrewind()", "index rewound.", rc); /*----------------------------------------------------------*/ /* DBGETNR() - after 'rewind()ing' to the top of the table */ /* the first record using the active key can be */ /* retrieved with dbgetnr() */ /*----------------------------------------------------------*/ 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() - positions the record pointer to the top of the */ /* index file */ /*--------------------------------------------------------------*/ rc = dbxrewind(dbx); errorproc("dbxrewind()", "Tagged index rewound.", rc); /*-----------------------------------------------------------*/ /* DBXGETNR() - after 'rewind()ing' to the top of the table */ /* the first record using the active key can be */ /* retrieved with dbgetnr() */ /*-----------------------------------------------------------*/ 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 compat. 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 Rectial 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 dec. 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); rc = dbxakey(dbx, db_size + 1L); errorproc("dbxakey()", "key added.", rc); dbflush(dbf); /* Good Habit on shared files */ 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 multiuser */ /* 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 void 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; }
