new file mode 100644
--- /dev/null
+++ b/xf.c
@@ -0,0 +1,316 @@
+/* Copyright 1990-2011, Jsoftware Inc.  All rights reserved. */
+/* License in license.txt.                                   */
+/*                                                                         */
+/* Xenos: Files                                                            */
+
+/* File functions accept file number or boxed file name or 1 or 2          */
+
+#ifdef _WIN32
+#include <windows.h>
+#include <winbase.h>
+#endif
+
+#include "j.h"
+#include "x.h"
+
+#if !SY_WIN32 && (SYS & SYS_DOS)
+#include <dos.h>
+#endif
+
+#if (SYS & SYS_UNIX)
+#include <stdlib.h>
+typedef long long INT64;
+#endif
+
+#if SY_WIN32 && !SY_WINCE
+#include <direct.h>
+#include <io.h>
+#endif
+
+
+#if SY_64
+static I fsize(F f){fpos_t z;
+ RZ(f);
+#if SY_WIN32
+ _lseeki64(_fileno(f),0,SEEK_END); 
+#else
+ fseek(f,0L,SEEK_END);
+#endif
+ fgetpos(f,&z);
+ R *(I*)&z;
+}
+#else
+static I fsize(F f){
+ RZ(f);
+ if(fseek(f,0L,SEEK_END))R -1;
+ R ftell(f);
+}
+#endif
+
+static A jtrdns(J jt,F f){A za,z;I n;size_t r,tr=0;
+ GA(za,LIT,n=1024,1,0); clearerr(f);
+ while(!feof(f) && (r=fread(CAV(za)+tr,sizeof(C),n-tr,f))){
+  tr+=r; if(tr==(U)n){RZ(za=ext(0,za));n*=2;}
+ }
+ if(tr==(U)n)z=za;
+ else {GA(z,LIT,tr,1,0); MC(CAV(z),CAV(za),tr);}
+ R z;
+}    /* read entire file stream (non-seekable) */
+
+A jtrd(J jt,F f,I j,I n){A z;C*x;I p=0;size_t q=1;
+ RZ(f);
+ if(0>n){if(j<0) n=-j; else n=fsize(f)-j;}
+
+#if !SY_WINCE
+ {INT64 v; v= j+((0>j)?fsize(f):0); fsetpos(f,(fpos_t*)&v);}
+#else
+ fseek(f,(long)(0>j?1+j:j),0>j?SEEK_END:SEEK_SET);
+#endif
+
+ clearerr(f);
+ GA(z,LIT,n,1,0); x=CAV(z);
+ while(q&&n>p){
+  p+=q=fread(p+x,sizeof(C),(size_t)(n-p),f);
+  if(ferror(f))R jerrno();
+ }
+ R z;
+}    /* read file f for n bytes at j */
+
+static B jtwa(J jt,F f,I j,A w){C*x;I n,p=0;size_t q=1;
+ RZ(f&&w);
+ n=AN(w)*(C2T&AT(w)?2:1); x=CAV(w);
+
+#if !SY_WINCE
+ {INT64 v; v= j+((0>j)?fsize(f):0); fsetpos(f,(fpos_t*)&v);}
+#else
+ fseek(f,(long)(0>j?1+j:j),0>j?SEEK_END:SEEK_SET);
+#endif
+ 
+ clearerr(f);
+ while(q&&n>p){
+  p+=q=fwrite(p+x,sizeof(C),(size_t)(n-p),f); 
+  if(ferror(f))R jerrno()?1:0;
+ }
+ R 1;
+}    /* write/append string w to file f at j */
+
+
+F1(jtjfread){A z;F f;
+ F1RANK(0,jtjfread,0);
+ RE(f=stdf(w));
+ if(f)R 1==(I)f?jgets("\001"):3==(I)f?rdns(stdin):rd(vfn(f),0L,-1L);
+ RZ(f=jope(w,FREAD)); z=rd(f,0L,-1L); fclose(f); 
+ R z;
+}
+
+F2(jtjfwrite){B b;F f;
+ F2RANK(RMAX,0,jtjfwrite,0);
+ if(BOX&AT(w)){ASSERT(1>=AR(a),EVRANK); ASSERT(!AN(a)||AT(a)&LIT+C2T,EVDOMAIN);}
+ RE(f=stdf(w));
+ if(2==(I)f){b=jt->tostdout; jt->tostdout=1; jt->mtyo=MTYOFILE; jpr(a); jt->mtyo=0; jt->tostdout=b; R a;}
+ if(4==(I)f){R (U)AN(a)!=fwrite(CAV(a),sizeof(C),AN(a),stdout)?jerrno():a;}
+ if(5==(I)f){R (U)AN(a)!=fwrite(CAV(a),sizeof(C),AN(a),stderr)?jerrno():a;}
+ if(b=!f)RZ(f=jope(w,FWRITE)) else RE(vfn(f)); 
+ wa(f,0L,a); 
+ if(b)fclose(f);else fflush(f);
+ RNE(mtm);
+}
+
+F2(jtjfappend){B b;F f;
+ F2RANK(RMAX,0,jtjfappend,0);
+ RE(f=stdf(w));
+ if(2==(I)f){B b=jt->tostdout; jt->tostdout=1; jpr(a); jt->tostdout=b; R a;}
+ ASSERT(!AN(a)||AT(a)&LIT+C2T,EVDOMAIN);
+ ASSERT(1>=AR(a),EVRANK);
+ if(b=!f)RZ(f=jope(w,FAPPEND)) else RE(vfn(f));
+ wa(f,fsize(f),a);
+ if(b)fclose(f);else fflush(f);
+ RNE(mtm);
+}
+
+F1(jtjfsize){B b;F f;I m;
+ F1RANK(0,jtjfsize,0);
+ RE(f=stdf(w));
+ if(b=!f)RZ(f=jope(w,FREAD)) else RE(vfn(f)); 
+ m=fsize(f); 
+ if(b)fclose(f);else fflush(f);
+ RNE(sc(m));
+}
+
+static F jtixf(J jt,A w){F f;
+ ASSERT(2<=AN(w),EVLENGTH);
+ switch(AT(w)){
+  default:  ASSERT(0,EVDOMAIN);
+  case B01: ASSERT(0,EVFNUM);
+  case BOX: ASSERT(2==AN(w),EVLENGTH); f=stdf(head(w)); break; 
+  case INT: f=(F)*AV(w); ASSERT(2<(UI)f,EVFNUM);
+ }
+ R f?vfn(f):f;
+}    /* process index file arg for file number; 0 if a file name */
+
+static B jtixin(J jt,A w,I s,I*i,I*n){A in,*wv;I j,k,m,*u,wd;
+ if(AT(w)&BOX){wv=AAV(w); wd=(I)w*ARELATIVE(w); RZ(in=vi(WVR(1))); k=AN(in); u=AV(in);}
+ else{in=w; k=AN(in)-1; u=1+AV(in);}
+ ASSERT(1>=AR(in),EVRANK);
+ ASSERT(k&&k<=(n?2:1),EVLENGTH);
+ j=u[0]; j=0>j?s+j:j; m=1==k?s-j:u[1];
+ ASSERT(0<=j&&(!n||j<s&&j+m<=s&&0<=m),EVINDEX);
+ *i=j; if(n)*n=m;
+ R 1;
+}    /* process index file arg for index and length */
+
+F1(jtjiread){A z=0;B b;F f;I i,n;
+ F1RANK(1,jtjiread,0);
+ RE(f=ixf(w)); if(b=!f)RZ(f=jope(w,FREAD));
+ if(ixin(w,fsize(f),&i,&n))z=rd(f,i,n);
+ if(b)fclose(f);else fflush(f);
+ R z;
+}
+
+F2(jtjiwrite){B b;F f;I i;
+ F2RANK(RMAX,1,jtjiwrite,0);
+ ASSERT(!AN(a)||AT(a)&LIT+C2T,EVDOMAIN);
+ ASSERT(1>=AR(a),EVRANK);
+ RE(f=ixf(w)); if(b=!f)RZ(f=jope(w,FUPDATE));
+ if(ixin(w,fsize(f),&i,0L))wa(f,i,a); 
+ if(b)fclose(f);else fflush(f);
+ RNE(mtm);
+}
+
+
+#if (SYS & SYS_MACINTOSH)
+
+static B setparm(C*v,C*ms,HParamBlockRec mp){I n;
+ n=strlen(v);
+ ASSERT(n<=NPATH,EVLIMIT); *ms=n; MC(1+ms,v,n);
+ mp.fileParam.ioNamePtr=ms;
+ mp.fileParam.ioVRefNum=0;
+ mp.fileParam.ioDirID  =0;
+ R 1;
+}
+
+#define DIRF(f,fsub)  \
+ B f(J jt,C*v){C ms[256];HParamBlockRec mp; \
+  RZ(setparm(v,ms,mp));                     \
+  ASSERT(!fsub(&mp,0),EVFACE);              \
+  R 1;                                      \
+ }
+
+static DIRF(jtmkdir1,PBDirCreate)
+static DIRF(jtrmdir1,PBHDelete  )
+
+static B mkdir(C*v){R!mkdir1(v);}
+static B rmdir(C*v){R!rmdir1(v);}
+
+#endif
+
+
+F1(jtjmkdir){A y,z;
+ F1RANK(0,jtjmkdir,0);
+ ASSERT(AT(w)&BOX,EVDOMAIN);
+ RZ(y=str0(vs(AAV0(w))));
+#if (SYS & SYS_UNIX)
+ R mkdir(CAV(y),0775)?jerrno():one;
+#else
+ RZ(z=toutf16x(y));
+ R _wmkdir((US*)CAV(z))?jerrno():one;
+#endif
+}
+
+F1(jtjferase){A y,fn;US*s;I h;
+ F1RANK(0,jtjferase,0);
+ RE(h=fnum(w));
+ if(h) y=str0(fname(sc(h))); else y=AAV0(w);
+ ASSERT(y,EVFNUM);
+ if(h)RZ(jclose(sc(h)));
+#if (SYS&SYS_UNIX)
+ R !unlink(CAV(y))||!rmdir(CAV(y))?one:jerrno();
+#else
+ RZ(fn=toutf16x(y));
+ s=USAV(fn);
+ R !_wunlink(s)||!_wrmdir(s)?one:jerrno();
+#endif
+}    /* erase file or directory */
+
+F1(jtpathcwd){C path[1+NPATH];US wpath[1+NPATH];
+ ASSERTMTV(w);
+#if SY_WINCE
+ &path;&wpath; /* avoid compiler warnings */
+ R cstr("\\");
+#else
+#if (SYS & SYS_UNIX)
+ ASSERT(getcwd(path,NPATH),EVFACE);
+#else
+ ASSERT(_wgetcwd(wpath,NPATH),EVFACE);
+ jttoutf8x(jt,path,NPATH,wpath);
+#endif
+ R cstr(path);
+#endif
+}
+
+F1(jtpathchdir){A z;
+ RZ(w);
+ ASSERT(1>=AR(w),EVRANK);
+ ASSERT(AN(w),EVLENGTH);
+ ASSERT(LIT&AT(w),EVDOMAIN);
+#if SY_WINCE
+ &z; /* avoid compiler warning */
+ ASSERT(0,EVFACE);
+#else
+#if (SYS & SYS_UNIX)
+ ASSERT(!chdir(CAV(w)),EVFACE);
+#else
+ RZ(z=toutf16x(w));
+ _wchdir((US*)CAV(z));
+#endif
+ R mtv;
+#endif
+}
+
+#if SY_WINCE
+#define _wgetenv(s)		(0)
+#endif
+
+F1(jtjgetenv){
+ F1RANK(1,jtjgetenv,0);
+ ASSERT(LIT&AT(w),EVDOMAIN);
+#if (SYS & SYS_UNIX)
+ {
+  C*s;
+  R(s=getenv(CAV(w)))?cstr(s):zero;
+ }
+#else
+ {
+  A z; US* us;
+  RZ(z=toutf16x(w));
+  us=_wgetenv((US*)CAV(z));
+  if(!us)R zero;
+  GA(z,C2T,wcslen(us),1,0);
+  memcpy(USAV(z),us,2*wcslen(us));
+  R toutf8(z);
+ }
+#endif
+ R zero;
+}
+
+F1(jtjgetpid){
+ ASSERTMTV(w);
+#if SY_WIN32
+ R(sc(GetCurrentProcessId()));
+#else
+ R(sc(getpid()));
+#endif
+}
+
+#if (SYS & SYS_UNIX)
+F1(jtpathdll){
+ ASSERTMTV(w); R cstr("");
+} 
+#else
+F1(jtpathdll){char p[MAX_PATH]; extern C dllpath[];
+ ASSERTMTV(w);
+ strcpy(p,dllpath);
+ if('\\'==p[strlen(p)-1]) p[strlen(p)-1]=0;
+ R cstr(p);
+}
+#endif