Argox PA-20, Руководство по программированию

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PT-20 Programming Guide
56
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.