hedgewars/uPhysFSLayer.pas
author unc0rr
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unit uPhysFSLayer;
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interface
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uses SDLh, LuaPas;
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const PhysfsLibName = {$IFDEF PHYSFS_INTERNAL}'libhwphysfs'{$ELSE}'libphysfs'{$ENDIF};
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const PhyslayerLibName = 'libphyslayer';
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{$IFNDEF WIN32}
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    {$linklib physfs}
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    {$linklib physlayer}
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{$ENDIF}
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procedure initModule;
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procedure freeModule;
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type PFSFile = pointer;
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function rwopsOpenRead(fname: shortstring): PSDL_RWops;
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function rwopsOpenWrite(fname: shortstring): PSDL_RWops;
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function pfsOpenRead(fname: shortstring): PFSFile;
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function pfsClose(f: PFSFile): boolean;
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procedure pfsReadLn(f: PFSFile; var s: shortstring);
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procedure pfsReadLnA(f: PFSFile; var s: ansistring);
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function pfsBlockRead(f: PFSFile; buf: pointer; size: Int64): Int64;
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function pfsEOF(f: PFSFile): boolean;
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function pfsExists(fname: shortstring): boolean;
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function  physfsReader(L: Plua_State; f: PFSFile; sz: Psize_t) : PChar; cdecl; external PhyslayerLibName;
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procedure physfsReaderSetBuffer(buf: pointer); cdecl; external PhyslayerLibName;
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procedure hedgewarsMountPackage(filename: PChar); cdecl; external PhyslayerLibName;
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implementation
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uses uUtils, uVariables, sysutils;
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function PHYSFS_init(argv0: PChar) : LongInt; cdecl; external PhysfsLibName;
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function PHYSFS_deinit() : LongInt; cdecl; external PhysfsLibName;
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function PHYSFSRWOPS_openRead(fname: PChar): PSDL_RWops; cdecl ; external PhyslayerLibName;
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function PHYSFSRWOPS_openWrite(fname: PChar): PSDL_RWops; cdecl; external PhyslayerLibName;
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function PHYSFS_mount(newDir, mountPoint: PChar; appendToPath: LongBool) : LongInt; cdecl; external PhysfsLibName;
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function PHYSFS_openRead(fname: PChar): PFSFile; cdecl; external PhysfsLibName;
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function PHYSFS_eof(f: PFSFile): LongBool; cdecl; external PhysfsLibName;
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function PHYSFS_readBytes(f: PFSFile; buffer: pointer; len: Int64): Int64; cdecl; external PhysfsLibName;
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function PHYSFS_close(f: PFSFile): LongBool; cdecl; external PhysfsLibName;
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function PHYSFS_exists(fname: PChar): LongBool; cdecl; external PhysfsLibName;
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procedure hedgewarsMountPackages(); cdecl; external PhyslayerLibName;
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function rwopsOpenRead(fname: shortstring): PSDL_RWops;
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begin
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    exit(PHYSFSRWOPS_openRead(Str2PChar(fname)));
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end;
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function rwopsOpenWrite(fname: shortstring): PSDL_RWops;
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begin
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    exit(PHYSFSRWOPS_openWrite(Str2PChar(fname)));
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end;
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function pfsOpenRead(fname: shortstring): PFSFile;
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begin
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    exit(PHYSFS_openRead(Str2PChar(fname)));
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end;
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function pfsEOF(f: PFSFile): boolean;
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begin
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    exit(PHYSFS_eof(f))
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end;
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function pfsClose(f: PFSFile): boolean;
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begin
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    exit(PHYSFS_close(f))
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end;
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function pfsExists(fname: shortstring): boolean;
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begin
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    exit(PHYSFS_exists(Str2PChar(fname)))
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end;
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procedure pfsReadLn(f: PFSFile; var s: shortstring);
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var c: char;
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begin
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s[0]:= #0;
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while (PHYSFS_readBytes(f, @c, 1) = 1) and (c <> #10) do
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    if (c <> #13) and (s[0] < #255) then
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        begin
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        inc(s[0]);
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        s[byte(s[0])]:= c
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        end
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end;
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procedure pfsReadLnA(f: PFSFile; var s: ansistring);
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var c: char;
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    b: shortstring;
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begin
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s:= '';
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b[0]:= #0;
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while (PHYSFS_readBytes(f, @c, 1) = 1) and (c <> #10) do
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    if (c <> #13) then
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        begin
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        inc(b[0]);
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        b[byte(b[0])]:= c;
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        if b[0] = #255 then
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            begin
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            s:= s + b;
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            b[0]:= #0
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            end
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        end;
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s:= s + b
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end;
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function pfsBlockRead(f: PFSFile; buf: pointer; size: Int64): Int64;
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var r: Int64;
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begin
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    r:= PHYSFS_readBytes(f, buf, size);
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    if r <= 0 then
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        pfsBlockRead:= 0
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    else
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        pfsBlockRead:= r
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end;
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procedure initModule;
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var i: LongInt;
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    cPhysfsId: shortstring;
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begin
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{$IFDEF HWLIBRARY}
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    //TODO: http://icculus.org/pipermail/physfs/2011-August/001006.html
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    cPhysfsId:= GetCurrentDir() + {$IFDEF DARWIN}{$IFNDEF IPHONEOS}'/Hedgewars.app/Contents/MacOS/' + {$ENDIF}{$ENDIF} ' hedgewars';
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{$ELSE}
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    cPhysfsId:= ParamStr(0);
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{$ENDIF}
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    i:= PHYSFS_init(Str2PChar(cPhysfsId));
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    AddFileLog('[PhysFS] init: ' + inttostr(i));
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    i:= PHYSFS_mount(Str2PChar(PathPrefix), nil, false);
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    AddFileLog('[PhysFS] mount ' + PathPrefix + ': ' + inttostr(i));
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    i:= PHYSFS_mount(Str2PChar(UserPathPrefix + '/Data'), nil, false);
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    AddFileLog('[PhysFS] mount ' + UserPathPrefix + '/Data: ' + inttostr(i));
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    hedgewarsMountPackages;
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    i:= PHYSFS_mount(Str2PChar(UserPathPrefix), nil, false);
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    // need access to teams and frontend configs (for bindings)
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    AddFileLog('[PhysFS] mount ' + UserPathPrefix + ': ' + inttostr(i)); 
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end;
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procedure freeModule;
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begin
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    PHYSFS_deinit;
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end;
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end.