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{
This file is part of the Free Pascal run time library.
Copyright (c) 2000 by Marco van de Voort(marco@freepascal.org)
member of the Free Pascal development team
libiconv header translation + a helper routine
http://wiki.freepascal.org/iconvenc Dynamic version
See the file COPYING.FPC, included in this distribution,
for details about the copyright. (LGPL)
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
}
unit iconvenc_dyn;
interface
{$mode objfpc}{$H+}
uses
ctypes,unixtype,baseunix,
dl,
initc;
const
n = 1;
{$ifdef beos}
ESysEILSEQ = EILSEQ;
{$endif}
type
piconv_t = ^iconv_t;
iconv_t = pointer;
Ticonv_open = function(__tocode: pchar; __fromcode: pchar): iconv_t; cdecl;
Ticonv = function(__cd: iconv_t; __inbuf: ppchar; __inbytesleft: psize_t; __outbuf: ppchar; __outbytesleft: psize_t): size_t; cdecl;
Ticonv_close = function(__cd: iconv_t): cint; cdecl;
var
iconv_lib: pointer;
iconv_open: Ticonv_open;
iconv: Ticonv;
iconv_close: Ticonv_close;
IconvLibFound: boolean = False;
function TryLoadLib(LibName: string; var error: string): boolean; // can be used to load non standard libname
function Iconvert(s: string; var res: string; FromEncoding, ToEncoding: string): cint;
function InitIconv(var error: string): boolean;
implementation
function TryLoadLib(LibName: string; var error: string): boolean;
function resolvesymbol (var funcptr; symbol: string): Boolean;
begin
pointer(funcptr) := pointer(dlsym(iconv_lib, pchar(symbol)));
result := assigned(pointer(funcptr));
if not result then
error := error+#13#10+dlerror();
end;
var
res: boolean;
begin
result := false;
Error := Error+#13#10'Trying '+LibName;
iconv_lib := dlopen(pchar(libname), RTLD_NOW);
if Assigned(iconv_lib) then
begin
result := true;
result := result and resolvesymbol(pointer(iconv),'iconv');
result := result and resolvesymbol(pointer(iconv_open),'iconv_open');
result := result and resolvesymbol(pointer(iconv_close),'iconv_close');
if not result then
begin
result:=true;
result := result and resolvesymbol(pointer(iconv),'libiconv');
result := result and resolvesymbol(pointer(iconv_open),'libiconv_open');
result := result and resolvesymbol(pointer(iconv_close),'libiconv_close');
end;
// if not res then
// dlclose(iconv_lib);
end else
error:=error+#13#10+dlerror();
end;
function InitIconv(var error: string): boolean;
begin
result := true;
error := '';
if not TryLoadLib('libc.so.6', error) then
if not TryLoadLib('libiconv.so', error) then
{$if defined(haiku)}
if not TryLoadLib('libtextencoding.so', error) then
{$ifend}
result := false;
iconvlibfound := iconvlibfound or result;
end;
{$i iconvert.inc}
end.
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