|
XFA( ) |
Extended Field Attributes |
XFA(varlist[,ERR=stmtref])
Where:
|
stmtref |
Program line number or statement label to which to transfer control. |
|
varlist |
List of variables in the string template. |
Extended field-attribute information in string template.
The XFA( ) function returns extended field attribute information stored in a string template:
|
|
Format |
Returns |
|
|
XFA(var," ") |
A list of variables |
|
|
XFA(var,"fieldname") |
User-defined portion of the field |
0120 dim CST$:iol=0130 rem does NOT create a valid string template for XFA( )
0130 iolist NAME$,ADDR$,CITY$,ZIP$ rem valid iol for the composite string above
0140 rem But XFA(string above) generates Error #26: Variable type invalid
0150 rem
0170 rem XFA( ) is for use with other Business Basics' string template formats
0180 let J$="B JONES",K$="23 SOME ST.",L$="MYCITY",M=78923
0190 dim CST$:"NAME:C(20*),ADDR:C(30*),CITY:C(20*),ZIP:N(10*):type=cur"
0200 let CST.NAME$=J$
0210 let CST.CITY$=K$
0220 let CST.ADDR$=L$
0230 let CST.ZIP=M
0240 rem
0250 print xfa(CST$,"")
0260 print xfa(CST$,"NAME")
0270 print xfa(CST$,"ZIP","type")
->end
->run
NAME
ADDR
CITY
ZIP
_À
cur
hta(xfa(CST$,"NAME"))
01C00A0001000100000014
The Hex string of the XFA( ) function in the previous example reports the following information about the string template field attributes:
|
Bytes |
Information Returned |
|
1,1 |
Code 1 - 8 for field type |
|
2,1 |
Flag bit |
|
3,1 |
Field terminator |
|
4,2 |
Size of repeating field or $0001$ if not repeating |
|
6,2 |
Field number, based on line feeds |
|
8,2 |
Field offset if prior field is variable length |
|
10,2 |
Field length |
|
12, |
User-defined attributes |