{$INCLUDE "options.inc"}

unit uPhysFSLayer;

interface

uses SDLh, LuaPas;

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

const PhyslayerLibName = 'libphyslayer';

{$IFNDEF WIN32}

    {$linklib physfs}

    {$linklib physlayer}

{$ENDIF}

procedure initModule(localPrefix, userPrefix: PChar);

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;

function pfsSeek(f: PFSFile; pos: QWord): 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 pfsEnumerateFiles(dir: shortstring): PPChar;

procedure pfsFreeList(list: PPChar);

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;

implementation

uses uConsts, uUtils, uVariables{$IFNDEF PAS2C}, sysutils{$ELSE}, physfs{$ENDIF};

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

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

procedure hedgewarsMountPackages(); cdecl; external PhyslayerLibName;

{$IFNDEF PAS2C}

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

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

function PHYSFS_mount(newDir, mountPoint: PChar; appendToPath: LongBool) : LongBool; 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_seek(f: PFSFile; pos: QWord): LongBool; cdecl; external PhysfsLibName;

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

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

function PHYSFS_getLastError(): PChar; cdecl; external PhysfsLibName;

function PHYSFS_enumerateFiles(dir: PChar): PPChar; cdecl; external PhysfsLibName;

procedure PHYSFS_freeList(list: PPChar); cdecl; external PhysfsLibName;

{$ELSE}

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

begin

    PHYSFS_readBytes:= PHYSFS_read(f, buffer, 1, len);

end;

{$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 pfsSeek(f: PFSFile; pos: QWord): boolean;

begin

    exit(PHYSFS_seek(f, 0));

end;

function pfsExists(fname: shortstring): boolean;

begin

    exit(PHYSFS_exists(Str2PChar(fname)))

end;

function pfsEnumerateFiles(dir: shortstring): PPChar;

begin

    exit(PHYSFS_enumerateFiles(Str2PChar(dir)))

end;

procedure pfsFreeList(list: PPChar);

begin

    PHYSFS_freeList(list)

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 + ansistring(b);

            b[0]:= #0

            end

        end;

s:= s + ansistring(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 pfsMount(path: ansistring; mountpoint: PChar);

begin

    if PHYSFS_mount(PChar(path), mountpoint, false) then

        //AddFileLog('[PhysFS] mount ' + shortstring(path) + ' at ' + shortstring(mountpoint) + ' : ok')

    else

        //AddFileLog('[PhysFS] mount ' + shortstring(path) + ' at ' + shortstring(mountpoint) + ' : FAILED ("' + shortstring(PHYSFS_getLastError()) + '")');

end;

procedure pfsMountAtRoot(path: ansistring);

begin

    pfsMount(path, PChar(_S'/'));

end;

procedure initModule(localPrefix, userPrefix: PChar);

var i: LongInt;

    cPhysfsId: shortstring;

    fp: PChar;

begin

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

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

    i:= PHYSFS_init(Str2PChar(cPhysfsId));

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

    // mount system fonts paths first

    for i:= low(cFontsPaths) to high(cFontsPaths) do

        begin

            fp := cFontsPaths[i];

            if fp <> nil then

                pfsMount(ansistring(fp), PChar('/Fonts'));

        end;

    pfsMountAtRoot(localPrefix);

    pfsMountAtRoot(userPrefix + ansistring('/Data'));

    pfsMount(userPrefix, PChar('/Config'));

    hedgewarsMountPackages;

    if cTestLua then

        begin

            pfsMountAtRoot(ansistring(ExtractFileDir(cScriptName)));

            cScriptName := ExtractFileName(cScriptName);

        end;

end;

procedure freeModule;

begin

    PHYSFS_deinit;

end;

end.