unit uPhysFSLayer;

interface

uses SDLh, LuaPas;

const PhysfsLibName = {$IFDEF PHYSFS_INTERNAL}'libhw_physfs'{$ELSE}'libphysfs'{$ENDIF};

const PhyslayerLibName = 'libphyslayer';

{$IFNDEF WIN32}

    {$linklib physfs}

    {$linklib physlayer}

    {statically linking physfs brings IOKit dependency on OSX}

    {$IFDEF DARWIN}

        {$linkframework IOKit}

    {$ENDIF}

{$ENDIF}

procedure initModule;

procedure freeModule;

type PFSFile = pointer;

function rwopsOpenRead(fname: shortstring): PSDL_RWops;

function rwopsOpenWrite(fname: shortstring): PSDL_RWops;

function pfsOpenRead(fname: shortstring): PFSFile;

function pfsClose(f: PFSFile): boolean;

procedure pfsReadLn(f: PFSFile; var s: shortstring);

procedure pfsReadLnA(f: PFSFile; var s: ansistring);

function pfsBlockRead(f: PFSFile; buf: pointer; size: Int64): Int64;

function pfsEOF(f: PFSFile): boolean;

function pfsExists(fname: shortstring): boolean;

function  physfsReader(L: Plua_State; f: PFSFile; sz: Psize_t) : PChar; cdecl; external PhyslayerLibName;

procedure physfsReaderSetBuffer(buf: pointer); cdecl; external PhyslayerLibName;

procedure hedgewarsMountPackage(filename: PChar); cdecl; external PhyslayerLibName;

{$IFNDEF PAS2C}

//apparently pas2c doesn't render the functions below if it finds 'implementation' first

implementation

uses uUtils, uVariables, sysutils;

{$ENDIF}

function PHYSFS_init(argv0: PChar) : LongInt; cdecl; external PhysfsLibName;

function PHYSFS_deinit() : LongInt; cdecl; external PhysfsLibName;

function PHYSFSRWOPS_openRead(fname: PChar): PSDL_RWops; cdecl; external PhyslayerLibName;

function PHYSFSRWOPS_openWrite(fname: PChar): PSDL_RWops; cdecl; external PhyslayerLibName;

function PHYSFS_mount(newDir, mountPoint: PChar; appendToPath: LongBool) : LongInt; cdecl; external PhysfsLibName;

function PHYSFS_openRead(fname: PChar): PFSFile; cdecl; external PhysfsLibName;

function PHYSFS_eof(f: PFSFile): LongBool; cdecl; external PhysfsLibName;

function PHYSFS_readBytes(f: PFSFile; buffer: pointer; len: Int64): Int64; cdecl; external PhysfsLibName;

function PHYSFS_close(f: PFSFile): LongBool; cdecl; external PhysfsLibName;

function PHYSFS_exists(fname: PChar): LongBool; cdecl; external PhysfsLibName;

procedure hedgewarsMountPackages(); cdecl; external PhyslayerLibName;

{$IFDEF PAS2C}

implementation

uses uUtils, uVariables;

{$ENDIF}

(*****************************************************************)

function rwopsOpenRead(fname: shortstring): PSDL_RWops;

begin

    exit(PHYSFSRWOPS_openRead(Str2PChar(fname)));

end;

function rwopsOpenWrite(fname: shortstring): PSDL_RWops;

begin

    exit(PHYSFSRWOPS_openWrite(Str2PChar(fname)));

end;

function pfsOpenRead(fname: shortstring): PFSFile;

begin

    exit(PHYSFS_openRead(Str2PChar(fname)));

end;

function pfsEOF(f: PFSFile): boolean;

begin

    exit(PHYSFS_eof(f))

end;

function pfsClose(f: PFSFile): boolean;

begin

    exit(PHYSFS_close(f))

end;

function pfsExists(fname: shortstring): boolean;

begin

    exit(PHYSFS_exists(Str2PChar(fname)))

end;

procedure pfsReadLn(f: PFSFile; var s: shortstring);

var c: char;

begin

s[0]:= #0;

while (PHYSFS_readBytes(f, @c, 1) = 1) and (c <> #10) do

    if (c <> #13) and (s[0] < #255) then

        begin

        inc(s[0]);

        s[byte(s[0])]:= c

        end

end;

procedure pfsReadLnA(f: PFSFile; var s: ansistring);

var c: char;

    b: shortstring;

begin

s:= '';

b[0]:= #0;

while (PHYSFS_readBytes(f, @c, 1) = 1) and (c <> #10) do

    if (c <> #13) then

        begin

        inc(b[0]);

        b[byte(b[0])]:= c;

        if b[0] = #255 then

            begin

            s:= s + b;

            b[0]:= #0

            end

        end;

s:= s + b

end;

function pfsBlockRead(f: PFSFile; buf: pointer; size: Int64): Int64;

var r: Int64;

begin

    r:= PHYSFS_readBytes(f, buf, size);

    if r <= 0 then

        pfsBlockRead:= 0

    else

        pfsBlockRead:= r

end;

procedure initModule;

var i: LongInt;

    cPhysfsId: shortstring;

begin

{$IFDEF HWLIBRARY}

    //TODO: http://icculus.org/pipermail/physfs/2011-August/001006.html

    cPhysfsId:= GetCurrentDir() + {$IFDEF DARWIN}'/Hedgewars.app/Contents/MacOS/' + {$ENDIF} ' hedgewars';

{$ELSE}

    cPhysfsId:= ParamStr(0);

{$ENDIF}

    i:= PHYSFS_init(Str2PChar(cPhysfsId));

    AddFileLog('[PhysFS] init: ' + inttostr(i));

    i:= PHYSFS_mount(Str2PChar(PathPrefix), nil, false);

    AddFileLog('[PhysFS] mount ' + PathPrefix + ': ' + inttostr(i));

    i:= PHYSFS_mount(Str2PChar(UserPathPrefix + '/Data'), nil, false);

    AddFileLog('[PhysFS] mount ' + UserPathPrefix + '/Data: ' + inttostr(i));

    hedgewarsMountPackages;

end;

procedure freeModule;

begin

    PHYSFS_deinit;

end;

end.