Difference between revisions of "Dbxgoto()"
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| Line 12: | Line 12: | ||
<input parameters> | <input parameters> | ||
| − | char *dbx; /* Tagged index file descriptor */ | + | char *dbx; /* Tagged index file descriptor */ |
| − | long recno; /* Record number to go to | + | long recno; /* Record number to go to */ |
| Line 40: | Line 40: | ||
<code lang="c"> | <code lang="c"> | ||
#include <stdio.h> | #include <stdio.h> | ||
| − | #include "dbl.h" | + | #include "dbl.h" /* Recital/Library include file */ |
| − | #include "dblproto.h" /* Recital/Library prototype file */ | + | #include "dblproto.h" /* Recital/Library prototype file */ |
static dBFIELD fields[6] = { | static dBFIELD fields[6] = { | ||
| Line 59: | Line 59: | ||
main() | main() | ||
{ | { | ||
| − | + | int rc; /* Return Code for error handling */ | |
| − | + | char *dbf; /* File descriptor for table */ | |
| − | + | char *dbx; /* File descriptor for tagged index */ | |
| − | + | long db_size; /* Size of table variable */ | |
| − | + | rc = dbdcache(100); | |
| − | + | errorproc("dbdcache()","table cache specified.", rc); | |
| − | + | rc = dbicache(100); | |
| − | + | errorproc("dbicache()", "index cache specified.", rc); | |
| − | + | rc = dbfilemode(1,0); | |
| − | + | rc = dbopen("shipwreck.dbf", &dbf); | |
| − | + | errorproc("dbopen()","table opened in shared mode.", rc); | |
| − | + | rc = dbsize(dbf, &db_size); | |
| − | + | errorproc("dbsize()", "size retrieved.", rc); | |
| − | + | printf("\t No. of Records: \t%d\n", db_size); | |
| − | + | rc = dbxgoto(dbx, db_size); | |
| − | + | errorproc("dbxgoto()", "gone to last physical record in table.", rc); | |
| − | + | rc = dbxclose(dbx); | |
| − | + | errorproc("dbxclose()", "tagged index closed.", rc); | |
| − | + | rc = dbclose(dbf); | |
| − | + | errorproc("dbclose()", "table closed.", rc); | |
| − | + | exit(0); | |
} | } | ||
| Line 93: | Line 93: | ||
{ | { | ||
if ( rc != SUCCESS ) { | if ( rc != SUCCESS ) { | ||
| − | + | printf("\n Error performing function %s -> %d\n", func, rc); | |
| − | + | exit(1); | |
} | } | ||
| − | printf("Function: t%s, t%s - | + | printf("Function: \t%s, \t%s - Ok\n", func, str); |
return; | return; | ||
} | } | ||
Latest revision as of 15:40, 5 May 2009
PURPOSE
go to specified record number and reposition keys in index tag
SYNOPSIS
#include "dbl.h" int dbxgoto(dbx, recno) <input parameters> char *dbx; /* Tagged index file descriptor */ long recno; /* Record number to go to */ <output parameters> none
RETURN VALUE
The dbxgoto() function returns for success, or < 0 if an error occurs. See the section on return code values for a detailed list of return codes.
DESCRIPTION
The dbxgoto() function will go to the specified record number in the table associated with the tagged file. The record number specified becomes the current record and the index tag is repositioned.
EXAMPLE
The following example checks how many records are in the table, then goes to the last physical record in the table.
#include <stdio.h> #include "dbl.h" /* Recital/Library include file */ #include "dblproto.h" /* Recital/Library prototype file */ static dBFIELD fields[6] = { "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 }; static void errorproc( char *func, char *str, int rc); main() { int rc; /* Return Code for error handling */ char *dbf; /* File descriptor for table */ char *dbx; /* File descriptor for tagged index */ long db_size; /* Size of table variable */ rc = dbdcache(100); errorproc("dbdcache()","table cache specified.", rc); rc = dbicache(100); errorproc("dbicache()", "index cache specified.", rc); rc = dbfilemode(1,0); rc = dbopen("shipwreck.dbf", &dbf); errorproc("dbopen()","table opened in shared mode.", rc); rc = dbsize(dbf, &db_size); errorproc("dbsize()", "size retrieved.", rc); printf("\t No. of Records: \t%d\n", db_size); rc = dbxgoto(dbx, db_size); errorproc("dbxgoto()", "gone to last physical record in table.", rc); rc = dbxclose(dbx); errorproc("dbxclose()", "tagged index closed.", rc); rc = dbclose(dbf); errorproc("dbclose()", "table closed.", rc); exit(0); } static void errorproc(func, str, rc) char *func; char *str; int rc; { if ( rc != SUCCESS ) { printf("\n Error performing function %s -> %d\n", func, rc); exit(1); } printf("Function: \t%s, \t%s - Ok\n", func, str); return; }
