nothing todo...
ok restart:
library pudf;
{$mode objfpc}{$H+}
uses
Classes,
p_func in 'p_func.pas';
exports
pround name 'p_round';
{$R pudf.res}
begin
// DECLARE EXTERNAL FUNCTION pround
// DOUBLE PRECISION, INTEGER
// RETURNS DOUBLE PRECISION BY VALUE
// ENTRY_POINT 'pudf_pround' MODULE_NAME 'pudf';
end.
and
unit p_func;
{$mode objfpc}{$H+}
interface
function p_round(var valore: double; ndec: integer): double; cdecl;
implementation
uses
Classes, SysUtils;
function p_round(var valore: double; ndec: integer): double; cdecl;
var
i: integer;
risultato: double;
ndivisore: integer;
begin
risultato:= valore;
ndivisore:= 1;
for i:= 1 to ndec do
begin
risultato:= risultato*10;
ndivisore:= ndivisore*10;
end;
result:= round(risultato)/ndivisore;
end;
end.
someone can compile and install?
I can... but when I try to execute
select round(123.1233, 2) as nrounded from rdb$database
always some error!!!
- Entry point should be p_round only in this case
- Adding also 'export' in the function declaration should help:
function p_round(var valore: double; ndec: integer): double; cdecl; export;
- The following needs to be corrected as well:
exports p_round name 'p_round';
_________^
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