Difference between revisions of "Library dblsamp"
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| Line 32: | Line 32: | ||
/*-------------------------------------------------------------------------------------------------*/ | /*-------------------------------------------------------------------------------------------------*/ | ||
static dBFIELD fields[7] = { | 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 | |
}; | }; | ||
| Line 50: | Line 50: | ||
/*-------------------------------------------------------------------------------------------------*/ | /*-------------------------------------------------------------------------------------------------*/ | ||
static char *text_table[] = { | static char *text_table[] = { | ||
| − | + | "Santa Margarita 80.027.5 7000000 95/01/01 Spanish ", | |
| − | + | "Santa Rosa 81.824.8 30000000 32/01/01 Spanish ", | |
| − | + | "Unknown galleon 83.123.0 0 15/01/01 Spanish", | |
| − | + | "Jessie 97.127.4 100000 75/01/01 U.S. ", | |
| − | + | "Lea 96.227.8 1000000 80/01/01 U.S. ", | |
| − | + | "S.J. Lee 96.926.9 200000 75/01/01 U.S. ", | |
| − | + | "Genovase 78.418.4 1850000 30/01/01 Spanish ", | |
| − | + | "Unknown Vessel 77.517.9 0 75/01/01 U.S. " | |
}; | }; | ||
| Line 65: | Line 65: | ||
main() | 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("ttRecord length in bytes: %dn", reclen); | |
| − | + | printf("ttCreation date: tt%d/%d/%dn", month, day, year); | |
| − | + | printf("ttNumber of fields: t%dn", 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("ttLocation of fields in buffer: t%d,%d,%d,%d,%d,%dn", | |
| − | + | 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: %dn", rc); | |
} | } | ||
| − | + | /*----------------------------------------------------------------------------------------*/ | |
| − | + | /* DBCLOSE() - close the active table */ | |
| − | + | /*----------------------------------------------------------------------------------------*/ | |
rc = dbclose(dbf); | 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%dn", 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%dn", i ); | |
| − | + | printf("t Key name: t%sn", tagname ); | |
| − | + | printf("t Key type: t%cn", keytype ); | |
| − | + | printf("t Key expression: %sn", keyexpr); | |
| − | + | printf("t Key length: %d Expression length: %dn", | |
| − | + | kexprlen, keylen); | |
| − | + | printf("t For expression: %sn", forexpr); | |
| − | + | printf("t Key unique: t%sn", keyunique ? "Yes" : "No" ); | |
| − | + | printf("t Key descending: t%sn", 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%cn", keytype ); | |
| − | + | printf("t Key expression: %sn", keyexpr); | |
| − | + | printf("t Key length: %d Expression length: %dn", | |
| − | + | kexprlen, keylen); | |
| − | + | /*----------------------------------------------------------------------------------------*/ | |
| − | + | /* Lock data file */ | |
| − | + | /*----------------------------------------------------------------------------------------*/ | |
| − | + | rc = dblockf(dbf); | |
| − | + | if ( rc == SUCCESS ) { | |
| − | + | printf("Function: tdblockf() tfile locked successfully.n"); | |
| − | + | } else { | |
| − | + | printf("Lock Failed. tError: %dn", 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: %dn", 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 */ | /* 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("tt%sn", 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("ttFlag: t%sn", 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, "ttfldbuf[%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("tt%sn", 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("tt%d: %sn", 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("ttnext key: t%sn", 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("ttprev key: t%sn", 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%sn", 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("ttrecord number: t%dn", 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("tt%sn", record); | |
| − | + | /*----------------------------------------------------------------------------------------*/ | |
| − | + | /* DBCKEY() - read the current key */ | |
| − | + | /*----------------------------------------------------------------------------------------*/ | |
| − | + | rc = dbckey(ndx, key, &recno); | |
| − | + | errorproc("dbckey()", "current key read.", rc); | |
| − | + | printf("ttcurrent key: t%sn", 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("tt%d: %sn", 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("ttnext key: t%sn", 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("ttprev key: t%sn", 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%sn", 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("ttrecord number: t%dn", 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("tt%sn", record); | |
| − | + | /*----------------------------------------------------------------------------------------*/ | |
| − | + | /* DBXCKEY() - read the current key */ | |
| − | + | /*----------------------------------------------------------------------------------------*/ | |
| − | + | rc = dbxckey(dbx, key, &recno); | |
| − | + | errorproc("dbxckey()", "current key read.", rc); | |
| − | + | printf("ttcurrent key: t%sn", 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: %sn", key); | |
| − | + | ||
/*----------------------------------------------------------------------------------------*/ | /*----------------------------------------------------------------------------------------*/ | ||
| − | + | /* DBSTRING() - formats non-'C' strings to C strings (null term) */ | |
| − | + | /*----------------------------------------------------------------------------------------*/ | |
| − | + | dbstring("Santa Pedro", 13, tmpbuf); | |
| − | + | printf("Function: tdbstring() toutput: %sn", 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%dn", 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 successfullyn"); | |
| − | + | } else { | |
| − | + | printf("Unlock Failed. tError: %dn", rc); | |
| − | + | } | |
| − | + | /*----------------------------------------------------------------------------------------*/ | |
| − | + | /* DBUNLOCKI() - unlocks an index file */ | |
| − | + | /*----------------------------------------------------------------------------------------*/ | |
| − | + | rc = dbunlocki(ndx); | |
| − | + | if ( rc == SUCCESS ) { | |
| − | + | printf("Function: tdbunlocki() tFile unlocked successfullyn"); | |
| − | + | } else { | |
| − | + | printf("Unlock Failed. tError: %dn", 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: %dn", rc); | |
| − | + | } | |
| − | + | /*----------------------------------------------------------------------------------------*/ | |
| − | + | /* DBUNLOCKR() - unlocks a table Record */ | |
| − | + | /*----------------------------------------------------------------------------------------*/ | |
| − | + | rc = dbunlockr(dbf, (long)7); | |
| − | + | if ( rc == SUCCESS ) { | |
| − | + | printf("Function tdbunlockr(): trecord unlocked successfullyn"); | |
| − | + | } else { | |
| − | + | printf("Unlock Failed. tError: %dn", 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 disabledn"); | |
| − | + | printf("nEnd of Recital C Library test program....n"); | |
| − | + | exit(0); | |
} | } | ||
| Line 876: | Line 876: | ||
int rc; | int rc; | ||
{ | { | ||
| − | + | if ( rc != SUCCESS ) { | |
| − | + | printf("n Error performing function %s -> %dn", func, rc); | |
| − | + | exit(1); | |
| − | + | } | |
printf("Function: t%s, t%s - Okn", func, str); | printf("Function: t%s, t%s - Okn", func, str); | ||
| − | + | return; | |
} | } | ||
| + | |||
| + | |||
| + | |||
</code> | </code> | ||
Revision as of 15:06, 31 March 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) 1988-2004 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 7000000 95/01/01 Spanish ", "Santa Rosa 81.824.8 30000000 32/01/01 Spanish ", "Unknown galleon 83.123.0 0 15/01/01 Spanish", "Jessie 97.127.4 100000 75/01/01 U.S. ", "Lea 96.227.8 1000000 80/01/01 U.S. ", "S.J. Lee 96.926.9 200000 75/01/01 U.S. ", "Genovase 78.418.4 1850000 30/01/01 Spanish ", "Unknown Vessel 77.517.9 0 75/01/01 U.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("ttRecord length in bytes: %dn", reclen); printf("ttCreation date: tt%d/%d/%dn", month, day, year); printf("ttNumber of fields: t%dn", 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("ttLocation of fields in buffer: t%d,%d,%d,%d,%d,%dn", 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: %dn", 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%dn", 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%dn", i ); printf("t Key name: t%sn", tagname ); printf("t Key type: t%cn", keytype ); printf("t Key expression: %sn", keyexpr); printf("t Key length: %d Expression length: %dn", kexprlen, keylen); printf("t For expression: %sn", forexpr); printf("t Key unique: t%sn", keyunique ? "Yes" : "No" ); printf("t Key descending: t%sn", 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%cn", keytype ); printf("t Key expression: %sn", keyexpr); printf("t Key length: %d Expression length: %dn", kexprlen, keylen); /*----------------------------------------------------------------------------------------*/ /* Lock data file */ /*----------------------------------------------------------------------------------------*/ rc = dblockf(dbf); if ( rc == SUCCESS ) { printf("Function: tdblockf() tfile locked successfully.n"); } else { printf("Lock Failed. tError: %dn", 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: %dn", 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("tt%sn", 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("ttFlag: t%sn", 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, "ttfldbuf[%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("tt%sn", 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("tt%d: %sn", 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("ttnext key: t%sn", 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("ttprev key: t%sn", 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%sn", 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("ttrecord number: t%dn", 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("tt%sn", record); /*----------------------------------------------------------------------------------------*/ /* DBCKEY() - read the current key */ /*----------------------------------------------------------------------------------------*/ rc = dbckey(ndx, key, &recno); errorproc("dbckey()", "current key read.", rc); printf("ttcurrent key: t%sn", 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("tt%d: %sn", 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("ttnext key: t%sn", 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("ttprev key: t%sn", 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%sn", 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("ttrecord number: t%dn", 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("tt%sn", record); /*----------------------------------------------------------------------------------------*/ /* DBXCKEY() - read the current key */ /*----------------------------------------------------------------------------------------*/ rc = dbxckey(dbx, key, &recno); errorproc("dbxckey()", "current key read.", rc); printf("ttcurrent key: t%sn", 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: %sn", key); /*----------------------------------------------------------------------------------------*/ /* DBSTRING() - formats non-'C' strings to C strings (null term) */ /*----------------------------------------------------------------------------------------*/ dbstring("Santa Pedro", 13, tmpbuf); printf("Function: tdbstring() toutput: %sn", 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%dn", 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 successfullyn"); } else { printf("Unlock Failed. tError: %dn", rc); } /*----------------------------------------------------------------------------------------*/ /* DBUNLOCKI() - unlocks an index file */ /*----------------------------------------------------------------------------------------*/ rc = dbunlocki(ndx); if ( rc == SUCCESS ) { printf("Function: tdbunlocki() tFile unlocked successfullyn"); } else { printf("Unlock Failed. tError: %dn", 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: %dn", rc); } /*----------------------------------------------------------------------------------------*/ /* DBUNLOCKR() - unlocks a table Record */ /*----------------------------------------------------------------------------------------*/ rc = dbunlockr(dbf, (long)7); if ( rc == SUCCESS ) { printf("Function tdbunlockr(): trecord unlocked successfullyn"); } else { printf("Unlock Failed. tError: %dn", 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 disabledn"); 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 -> %dn", func, rc); exit(1); } printf("Function: t%s, t%s - Okn", func, str); return; }
