Script loading via physfs which doesn't work:
- Some scripts just refuse to load for no obvious reason
- Some scripts load fine when you set BUFSIZE to a large
value, like 64k, but don't load with small values
Error messages in both cases don't seem to have relation
to lua file contents
--- a/hedgewars/uPhysFSLayer.pas Wed Nov 14 23:27:33 2012 +0400
+++ b/hedgewars/uPhysFSLayer.pas Fri Nov 16 00:46:33 2012 +0400
@@ -15,10 +15,13 @@
function rwopsOpenWrite(fname: shortstring): PSDL_RWops;
function pfsOpenRead(fname: shortstring): PFSFile;
-function pfsEOF(f: PFSFile): boolean;
function pfsClose(f: PFSFile): boolean;
procedure pfsReadLn(f: PFSFile; var s: shortstring);
+function pfsBlockRead(f: PFSFile; buf: pointer; size: Int64): Int64;
+function pfsEOF(f: PFSFile): boolean;
+
+function pfsExists(fname: shortstring): boolean;
implementation
uses uUtils, uVariables;
@@ -31,8 +34,9 @@
function PHYSFS_mount(newDir, mountPoint: PChar; appendToPath: LongBool) : LongInt; cdecl; external;
function PHYSFS_openRead(fname: PChar): PFSFile; cdecl; external;
function PHYSFS_eof(f: PFSFile): LongBool; cdecl; external;
-function PHYSFS_read(f: PFSFile; buf: pointer; objSize, objCount: Longword): Int64; cdecl; external;
+function PHYSFS_read(f: PFSFile; buf: pointer; objSize: Longword; objCount: Longword): Int64; cdecl; external;
function PHYSFS_close(f: PFSFile): LongBool; cdecl; external;
+function PHYSFS_exists(fname: PChar): LongBool; cdecl; external;
function rwopsOpenRead(fname: shortstring): PSDL_RWops;
begin
@@ -59,6 +63,11 @@
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;
@@ -73,6 +82,17 @@
end
end;
+function pfsBlockRead(f: PFSFile; buf: pointer; size: Int64): Int64;
+var r: Int64;
+begin
+ r:= PHYSFS_read(f, buf, 1, size);
+
+ if r <= 0 then
+ pfsBlockRead:= 0
+ else
+ pfsBlockRead:= r
+end;
+
procedure initModule;
var i: LongInt;
begin
@@ -81,7 +101,7 @@
i:= PHYSFS_mount(Str2PChar(PathPrefix), nil, true);
AddFileLog('[PhysFS] mount ' + PathPrefix + ': ' + inttostr(i));
- i:= PHYSFS_mount(Str2PChar(UserPathPrefix), nil, true);
+ i:= PHYSFS_mount(Str2PChar(UserPathPrefix + '/Data'), nil, true);
AddFileLog('[PhysFS] mount ' + UserPathPrefix + ': ' + inttostr(i));
end;
--- a/hedgewars/uScript.pas Wed Nov 14 23:27:33 2012 +0400
+++ b/hedgewars/uScript.pas Fri Nov 16 00:46:33 2012 +0400
@@ -81,7 +81,9 @@
uLandGraphics,
SDLh,
SysUtils,
- uIO;
+ uIO,
+ uPhysFSLayer
+ ;
var luaState : Plua_State;
ScriptAmmoLoadout : shortstring;
@@ -1964,16 +1966,46 @@
ScriptCall('onScreenResize');
end;
+// custom script loader via physfs, passed to lua_load
+const BUFSIZE = 16;
+var phyfsReaderBuffer: pointer;
+
+function physfsReader(L: Plua_State; f: PFSFile; sz: Psize_t) : PChar; cdecl;
+var fileSize: Longword;
+begin
+writeln(stdout, '==== reading');
+ if pfsEOF(f) then
+ physfsReader:= nil
+ else
+ begin
+ sz^:= pfsBlockRead(f, phyfsReaderBuffer, BUFSIZE);
+writeln(stdout, '==== read ' + inttostr(sz^));
+ if sz^ = 0 then
+ physfsReader:= nil
+ else
+ physfsReader:= phyfsReaderBuffer
+ end
+end;
+
procedure ScriptLoad(name : shortstring);
var ret : LongInt;
s : shortstring;
+ f : PFSFile;
begin
-s:= cPathz[ptData] + '/' + name;
-if not FileExists(s) then
+s:= cPathz[ptData] + name;
+if not pfsExists(s) then
exit;
-ret:= luaL_loadfile(luaState, Str2PChar(s));
+f:= pfsOpenRead(s);
+if f = nil then
+ exit;
+
+GetMem(phyfsReaderBuffer, BUFSIZE);
+ret:= lua_load(luaState, @physfsReader, f, Str2PChar(s));
+FreeMem(phyfsReaderBuffer, BUFSIZE);
+pfsClose(f);
+
if ret <> 0 then
begin
LuaError('Lua: Failed to load ' + name + '(error ' + IntToStr(ret) + ')');