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library myext;
{$mode objfpc}{$h+}
uses
sysutils,
ctypes,
sqlite3,
sqlite3ext;
procedure mysum(ctx: psqlite3_context; n: cint; v: ppsqlite3_value); cdecl;
var
a, b, r: cint;
begin
a := sqlite3_value_int(v[0]);
b := sqlite3_value_int(v[1]);
r := a + b;
sqlite3_result_int(ctx, r);
end;
procedure myconcat(ctx: psqlite3_context; n: cint; v: ppsqlite3_value); cdecl;
var
a, b, r: ansistring;
begin
a := sqlite3_value_text(v[0]);
b := sqlite3_value_text(v[1]);
r := a + b;
sqlite3_result_text(ctx, @r[1], length(r), nil);
end;
function sqlite3_extension_init(db: Psqlite3; pzErrMsg: Ppcchar;
const pApi: Psqlite3_api_routines): cint; cdecl; export;
var
rc: cint;
begin
SQLITE_EXTENSION_INIT2(pApi);
rc := sqlite3_create_function(db, 'mysum', 2, SQLITE_UTF8, nil,
@mysum, nil, nil);
if rc = SQLITE_OK then
Result := sqlite3_create_function(db, 'myconcat', 2, SQLITE_UTF8, nil,
@myconcat, nil, nil);
Result := rc;
end;
exports
sqlite3_extension_init;
begin
end.
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