Argox PA-20 Programming Guide - Manual (Page 62)

PT-20 Programming Guide 60
Description： Search the correctly appointed field. After search success, acquiring
another appointed field which including record of this field.
Several describe the argument as follows:
argument description
_DBMS* F_Search The file’s searching structure that has been
initialized.
char* field String data wanted to match.
int search_fieldno Field wanted to search.
int recordno Begin to search from which data.
int get_field_no After contrasting success, acquiring the
data of appointed field in this record.
char* F_Buffer After contrast success, it will write record
which included this field into buffer.
int flag FORWARD => Search from forward to
backward
BACKWARD => Search from backward to
forward
As success of searching, the file index will
stay in successful record front. When
search defeat, the file index will not be
moved.
Returns： When “F _ Buffer = NULL”, pass back – 1: Search defeat; Pass other
value back: That is the size of space for buffer.
When “F _ Buffer ≠ NULL”, pass back – 1: Search defeat; Pass other
value back: That is the record position which confirm to contrast data.
SearchMultiField_GF
Purpose： Search the designated field. The field’s information include field string
and field number.You can write many fields in this field buffer. After
searching success, acquiring the appointed field in including this field’s
record.
Syntax： int SearchMultiField_GF(_DBMS* F_Search, char* multi_field, int
recordno, int get_field_no, char* F_Buffer, int flag);
Example call： char str[20]=”00001,0;abcdefg,1”,str_buffer[60];
SearchMultiField_GF(&fsearch, str, 0,3,str_buffer,FORWARD);
Includes： #include “DBMS.h”
Description： Search the correctly appointed field. After search success, acquiring
another appointed field which including record of this field.
Several describe the argument as follows: