/*->c.copy */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <ctype.h>
#include <time.h>
#include <stdarg.h>


#include "h.os"
#include "h.bbc"
#include "h.wimp"
#include "h.flex"
#include "h.akbd"

#include "h.Drawlevel0"

#include "h.etc"

#include "h.wos"
#include "h.timex"
#include "h.key"
#include "h.main"
#include "h.ram"
#include "h.mym"
#include "h.strdef"

#include "h.file"
#include "h.serial"
#include "h.view"
#include "h.dir"
#include "h.xext"
#include "h.sched"
#include "h.pic"
#include "h.vx"
#include "h.replay"
#include "h.batch"
#include "h.fsx"
#include "h.err"


#include "h.copy"





static int xcrctab[] =                  /* CRC lookup table */
{   0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
    0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,
    0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,
    0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,
    0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,
    0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,
    0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,
    0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,
    0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,
    0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,
    0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,
    0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,
    0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,
    0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,
    0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640,
    0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041,
    0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240,
    0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441,
    0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41,
    0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840,
    0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,
    0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40,
    0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640,
    0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041,
    0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241,
    0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440,
    0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40,
    0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,
    0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40,
    0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,
    0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,
    0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040
};


#define addcrc(crc,c) ((((crc)>>8)&0x00ff) ^ xcrctab[((crc)^(c))&0x00ff])



#define MAXDEPTH 32


#define HEADS    29
#define ARCHEADS 41
#define FHEADS   32

#define ARCMARK 26 /*                   special archive marker        */
#define ARCVER   2 /* 9 */ /*           archive header version code   */
#define STRLEN 128 /*                   system standard string length */
#define FNLENF  13
#define ARCVER2 127               /* lower limit on new archive types */

#define ARCNOCOMP 0x82


#define CXNONE     2
#define CXNCR      3
#define CXPACK     4
#define CXSQUEEZE  4


#define CXCRUNCH    8
#define CXSQUASH    9
#define CXCOMPRESS  127
#define CXCOMPRESSZ 128



typedef struct heads
{
 char  name[12];
 fstat fs;
 int   hdrver;
 int   size;
 int   crc;
 int   hsize;

} heads;









#define DEFBUFFSIZE  0x10000


static os_error * blockcopy(int dh,int sh,heads * hdr)
{
 os_error * err;
 char     * buffer;
 int        size;
 int        transfer;
 int        chunk;
 int        crc;
 char     * p;
 int        i;

 transfer=hdr->fs.length;

 size=MIN(DEFBUFFSIZE,transfer);
 crc=hdr->crc;

 do
 {
  err=flex_alloce((flex_ptr)&buffer,size);
  if(!err) break;
  size/=2;
 } while(size>128);


 if(!err)
 {
  while(transfer>0)
  {
   chunk=MIN(size,transfer);

   fs_read(sh,buffer,chunk);
   fs_write(dh,buffer,chunk);

   p=buffer;
   for(i=0;i<chunk;i++) crc=addcrc(crc,(*p++));

   transfer-=chunk;
  }
  hdr->crc=crc; /* finishcrc(crc); */

  flex_free((flex_ptr)&buffer);
 }
 return(err);
}



/*****************************************************************************/

static os_error * readhdr(int fh,heads * hdr,int * eof)
{
 os_error * err;
 char              b;
 char              hdrver;
 int               arctype;
 short int         date;
 short int         time;


 err=NULL;

 *eof=0;

 fs_read(fh,&b,1);

 if(b!=ARCMARK) return(&err_badmark);

 fs_read(fh,&hdrver,1);

 hdr->hdrver=hdrver;

 if(hdrver & 0x80) 
 {
  arctype=1;
  hdr->hsize=ARCHEADS;
 }
 else
 {
  arctype=0;
  hdr->hsize=HEADS;
 }

 hdrver&=0x7F;

 if(hdrver==0)
 {
  *eof=1;
  return(0);
 }

 if(hdrver>ARCVER && hdrver<ARCVER2) return(&err_canthandle);

 fs_read(fh,hdr->name,FNLENF);

 fs_read(fh,&hdr->size,4);
 fs_read(fh,&date,2);
 fs_read(fh,&time,2);
 fs_read(fh,&hdr->crc,2);

 if(hdrver==1)                   /* old style is shorter */
 {
  hdrver=2;                      /* convert header to new format */
  hdr->fs.length=hdr->size;      /*size is same when notpacked*/
 }
 else 
 {
  fs_read(fh,&hdr->fs.length,4);

  if(arctype)
  {
   fs_read(fh,&hdr->fs.load,4);
   fs_read(fh,&hdr->fs.exec,4);
   fs_read(fh,&hdr->fs.acc,4);
   hdr->fs.type=filetype(hdr->fs.load);
  }
 }

 hdr->hdrver=hdrver;

 return(err);
}




static os_error * expandarc(char * source,char * dest)
{
 os_error * err;
 char       name[FSMAXPATH];
 int        fh;
 int        dh;
 int        plen[MAXDEPTH];
 heads      hdr;
 int        eof;
 int        fp;
 int        level;


 err=fs_open(source,'r',&fh);
 if(!err && fh)
 {
  strcpy(name,dest);
  level=0;
  plen[level]=strlen(name);
  fs_cdir(name);

  while(1)
  {
   err=readhdr(fh,&hdr,&eof);
   if(err) break;

   name[plen[level]]='.';
   strcpy(name+plen[level]+1,hdr.name);

   if(eof)  /* up a level */
   {
    if(--level<0) break;

   }
   else
   if(hdr.fs.type==ARCHIVE && hdr.hdrver==CXNONE) /* down a level */
   {
    level++;
    plen[level]=strlen(name);
    fs_cdir(name);
   }
   else        /* extract a file */
   {
    fs_tell(fh,&fp);

    err=fs_open(name,'w',&dh);
    if(!err && dh)
    {
     blockcopy(dh,fh,&hdr);
     err=fs_close(dh,err); 
     stamp(name,&hdr.fs);
    }

    fs_seek(fh,fp+hdr.size);
   }
  }

  err=fs_close(fh,err);
 }

 return(err);
}




/****************************************************************************/



static os_error * closedir(int fh,int posn)
{
 os_error * err;
 int        temp;
 int        newposn;

 /* write 26,0 */

 temp=ARCMARK | 0x8000;
 err=fs_write(fh,&temp,2);
 fs_tell(fh,&newposn);

 if(posn>=0)
 {
  temp=newposn-(posn+ARCHEADS); /* size of stuff */

  fs_seek(fh,posn+2+FNLENF);
  fs_write(fh,&temp,4);
  fs_seek(fh,posn+2+FNLENF+10);
  fs_write(fh,&temp,4);

  fs_seek(fh,newposn);         /* back where we were */
 }

 return(err);
}





static os_error * writehdr(int fh,heads * hdr)
{
 os_error * err;
 int        temp;
 int        date;
 int        time;

 err=NULL;

 arcgetstamp(hdr->fs.load,hdr->fs.exec,&date,&time);

 temp=ARCMARK;
 fs_write(fh,&temp,1);

 fs_write(fh,&hdr->hdrver,1);

 fs_write(fh,hdr->name,FNLENF);

 fs_write(fh,&hdr->size,4);
 fs_write(fh,&date,2);
 fs_write(fh,&time,2);
 fs_write(fh,&hdr->crc,2);

 fs_write(fh,&hdr->fs.length,4);

 fs_write(fh,&hdr->fs.load,4);
 fs_write(fh,&hdr->fs.exec,4);
 fs_write(fh,&hdr->fs.acc,4);

 return(err);
}


static os_error * adddir(int fh,fxstat * fs)
{
 heads hdr;

 hdr.fs=fs->f;
 strcpy(hdr.name,fs->name);
 hdr.crc=0;
 hdr.hdrver=CXNONE|128;
 hdr.size=hdr.fs.length=2;

 hdr.fs.load=hdr.fs.load & (~0xFFF00);
 hdr.fs.load|=ARCHIVE<<8;

 return(writehdr(fh,&hdr));
}



static os_error * addfile(int dh,char * name,fxstat * fs)
{
 os_error * err;
 heads      hdr;
 int        posn;
 int        posn2;
 int        sh;

 err=fs_open(name,'r',&sh);
 if(!err && sh)
 {
  hdr.fs=fs->f;
  strcpy(hdr.name,fs->name);
  hdr.crc=0;
  hdr.hdrver=CXNONE|128;
  hdr.size=fs->f.length;

           err=fs_tell(dh,&posn);
  if(!err) err=writehdr(dh,&hdr);
  if(!err) err=blockcopy(dh,sh,&hdr);
  if(!err) err=fs_tell(dh,&posn2);
  if(!err) err=fs_seek(dh,posn);
  if(!err) err=writehdr(dh,&hdr);
  if(!err) err=fs_seek(dh,posn2);

  err=fs_close(sh,err);
 }

 return(err);
}


static os_error * makearc(char * source,char * dest)
{
 os_error * err;
 int        level;
 int        fh;
 fxstat     fs;
 char       name[FSMAXLEAF];
 int        posn[MAXDEPTH];
 int        plen[MAXDEPTH];
 int        dposn[MAXDEPTH];

 err=fs_open(dest,'w',&fh);
 if(!err && fh)
 {
  strcpy(name,source);
  level=0;
  plen[level]=strlen(name);
  posn[level]=0;
  dposn[level]=-1;

  while(1)
  {
   setdirposn(posn[level]);
   name[plen[level]]=0;

   if(nextitem(name,&fs,NULL))
   {
    posn[level]=getdirposn();
    name[plen[level]]='.';
    strcpy(name+plen[level]+1,fs.name);

    if(fs.f.object==2)
    {
     level++;
     plen[level]=strlen(name);
     posn[level]=0;
     fs_tell(fh,&dposn[level]);
     adddir(fh,&fs);
    }
    else
    {
     addfile(fh,name,&fs);
    }
   }
   else /* up a level */
   {
    closedir(fh,dposn[level]);
    if(--level<0) break;
   }
  }
  err=fs_close(fh,err);
  setftype(dest,ARCHIVE);
 }
 return(err);
}



/* lname==source, rname==dest */

os_error * copyfile(char * rname,char * lname,int shift,int arc)
{
 os_error * err;
 fstat      fs;
 char       s[FSMAXPATH];

 err=stat(lname,&fs);
 if(!err)
 {
  if(arc)
  {
   if(fs.type==ARCHIVE)  /* expand archive     */
   {
    err=expandarc(lname,rname);
   }
   else
   if(fs.object==2)      /* compress directory */
   {
    err=makearc(lname,rname);
   }
  }
  else
  if((!shift) || rename(lname,rname))
  {
   sprintf(s,"copy %s %s ~qfr~c~v%c",lname,rname,shift?'d':' ');
   err=os_cli(s);
  }
 }

 return(err);
}




os_error * checkarc(tiffsum * tsum,char * name)
{
 os_error * err;
 heads      hdr;
 int        fh;
 int        eof;
 int        fp;
 int        level;

 err=fs_open(name,'r',&fh);
 if(!err && fh)
 {
  while(1)
  {
   err=readhdr(fh,&hdr,&eof);
   if(err) break;

   if(eof)  /* up a level */
   {
    if(--level<0) break;
   }
   else
   if(hdr.fs.type==ARCHIVE && hdr.hdrver==CXNONE) /* down a level */
   {
    level++;
   }
   else        /* extract a file */
   {
    fs_tell(fh,&fp);
    fs_seek(fh,fp+hdr.size);
   }
  }
  if(!err) tsum->maxwidth=1;
  err=fs_close(fh,err);
 }
 return(err);
}


