Argox PA-20 Programming Guide Bedienungsanleitung PDF herunterladen (Seite 58)

PT-20 Programming Guide

filepoint = _fopen(“c:\\data\\data.txt”,”r+”);

Ini_Search(filepoint, &fsearch, ausFielddlt, NULL, 0, 1, 0, 5, 0);

Example 2: Regular field length

_DBMS fsearch;

_TFILE *filepoint;

unsigned char field_size[5]={6,5,4,5,6};

unsigned char keyfield[2] = {0, 2};

int keyfieldNum = 2;

filepoint = _fopen(“c:\\data\\data.txt”,”a+”);

Ini_Search(filepoint, &fsearch, field_size, keyfield , keyfieldNum, 0, 26, 5,

0);

Includes：

#include “DBMS.h ”

Description：

This function can initialize a work of advance searching file. After inserting

every argument, you can use _ DBMS* F _ Search to search files.

When using this function to initial a DBMS search, you have to take care

for:

1. This function cannot support Variable field length search.

2. When initial, we will make a index file in C disk, so it has to take a few

time.

3. The index filename will be similar to origin file. For example, the

lookup file name is “AAA.txt”, the index filename will be “AAA.idx”. So,

you have to check the duplicate filename to avoid error fo making

index file.

4. You have to reserve some space for the function to make index file in

C disk.

Several introduces the argument as follows:

argument

description

_TFILE* filehd

An opened file handle.

_DBMS* F_Search

One of _DBMS start address has already

declared. Originally after the beginning

success this argument was used for written

into various kinds of search.

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Argox PA-20 Programming Guide Bedienungsanleitung Seite 58