#include	<stdio.h>
#include	<stdlib.h>
#include	<string.h>
#include	<ctype.h>

#ifdef VMS
#include	<unixio.h>
#include	<file.h>
#else
#include	<fcntl.h>
#ifndef	AMIGA
#include	<unistd.h>
#endif
#endif

#define	DO_DIR

#ifdef AMIGA
#undef	DO_DIR
#endif

#ifdef VMS
#undef	DO_DIR
#endif

#ifdef DO_DIR
#include	<dirent.h>
#endif

static char *rcsid = "$Id: devices.c,v 1.19 1997/03/30 19:36:18 david Exp $";

#define FALSE   0
#define TRUE    1

#include "atari.h"
#include "cpu.h"
#include "devices.h"
#include "rt-config.h"

#define	ICHIDZ	0x0020
#define	ICDNOZ	0x0021
#define	ICCOMZ	0x0022
#define	ICSTAZ	0x0023
#define	ICBALZ	0x0024
#define	ICBAHZ	0x0025
#define	ICPTLZ	0x0026
#define	ICPTHZ	0x0027
#define	ICBLLZ	0x0028
#define	ICBLHZ	0x0029
#define	ICAX1Z	0x002a
#define	ICAX2Z	0x002b

static char *H[5] =
{
  ".",
  atari_h1_dir,
  atari_h2_dir,
  atari_h3_dir,
  atari_h4_dir
};

static int devbug = FALSE;

static FILE	*fp[8] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL };
static int	flag[8];

static int	fid;
static char	filename[64];

#ifdef DO_DIR
static DIR	*dp = NULL;
#endif

void Device_Initialise (int *argc, char *argv[])
{
  int i;
  int j;

  for (i=j=1;i<*argc;i++)
    {
      if (strncmp(argv[i],"-H1",2) == 0)
	H[1] = argv[i]+2;
      else if (strncmp(argv[i],"-H2",2) == 0)
	H[2] = argv[i]+2;
      else if (strncmp(argv[i],"-H3",2) == 0)
	H[3] = argv[i]+2;
      else if (strncmp(argv[i],"-H4",2) == 0)
	H[4] = argv[i]+2;
      else if (strcmp(argv[i],"-devbug") == 0)
	devbug = TRUE;
      else
	argv[j++] = argv[i];
    }

  if (devbug)
    for (i=0;i<5;i++)
      printf ("H%d: %s\n", i, H[i]);

  *argc = j;
}

int Device_isvalid (char ch)
{
  int valid;

  if (isalnum(ch))
    valid = TRUE;
  else
    switch (ch)
      {
      case ':' :
      case '.' :
      case '_' :
      case '*' :
      case '?' :
	valid = TRUE;
	break;
      default :
	valid = FALSE;
	break;
      }

  return valid;
}

void Device_GetFilename ()
{
  int bufadr;
  int offset = 0;
  int devnam = TRUE;

  bufadr = (memory[ICBAHZ] << 8) | memory[ICBALZ];

  while (Device_isvalid(memory[bufadr]))
    {
      int byte = memory[bufadr];

      if (!devnam)
	{
	  if (isupper(byte))
	    byte = tolower(byte);

	  filename[offset++] = byte;
	}
      else if (byte == ':')
	devnam = FALSE;

      bufadr++;
    }

  filename[offset++] = '\0';
}

int match (char *pattern, char *filename)
{
  int status = TRUE;

  while (status && *filename && *pattern)
    {
      switch (*pattern)
	{
	case '?' :
	  pattern++;
	  filename++;
	  break;
	case '*' :
	  if (*filename == pattern[1])
	    {
	      pattern++;
	    }
	  else
	    {
	      filename++;
	    }
	  break;
	default :
	  status = (*pattern++ == *filename++);
	  break;
	}
    }
  if ((*filename)
      || ((*pattern)
	  && (((*pattern != '*') && (*pattern != '?'))
	      || pattern[1])))
  {
    status = 0;
  }
  return status;
}

void Device_HHOPEN (void)
{
  char fname[128];
  int devnum;
  int temp;

  if (devbug)
    printf ("HHOPEN\n");

  fid = memory[0x2e] >> 4;

  if (fp[fid])
    {
      fclose (fp[fid]);
      fp[fid] = NULL;
    }
/*
  flag[fid] = (memory[ICDNOZ] == 2) ? TRUE : FALSE;
*/
  Device_GetFilename ();
/*
  if (memory[ICDNOZ] == 0)
    sprintf (fname, "./%s", filename);
  else
    sprintf (fname, "%s/%s", h_prefix, filename);
*/
  devnum = memory[ICDNOZ];
  if (devnum > 9)
    {
      printf ("Attempt to access H%d: device\n", devnum);
      exit (1);
    }

  if (devnum >= 5)
    {
      flag[fid] = TRUE;
      devnum -= 5;
    }
  else
    {
      flag[fid] = FALSE;
    }

#ifdef VMS
/* Assumes H[devnum] is a directory _logical_, not an explicit directory
   specification! */
  sprintf (fname, "%s:%s", H[devnum], filename);
#else
  sprintf (fname, "%s/%s", H[devnum], filename);
#endif

  temp = memory[ICAX1Z];

  switch (temp)
    {
    case 4 :
      fp[fid] = fopen (fname, "r");
      if (fp[fid])
	{
	  regY = 1;
	  ClrN;
	}
      else
	{
	  regY = 170;
	  SetN;
	}
      break;
    case 6 :
    case 7 :
#ifdef DO_DIR
      fp[fid] = tmpfile ();
      if (fp[fid])
	{
	  dp = opendir (H[devnum]);
	  if (dp)
	    {
	      struct dirent	*entry;
	      
	      while ((entry = readdir (dp)))
		{
		  if (match(filename, entry->d_name))
		    fprintf (fp[fid],"%s\n", entry->d_name);
		}
	      
	      closedir (dp);

	      regY = 1;
	      ClrN;

	      rewind (fp[fid]);

	      flag[fid] = TRUE;
	    }
	  else
	    {
	      regY = 163;
	      SetN;
	      fclose (fp[fid]);
	      fp[fid] = NULL;
	    }
	}
      else
#endif
	{
	  regY = 163;
	  SetN;
	}
      break;
    case 8 :
      fp[fid] = fopen (fname, "w");
      if (fp[fid])
	{
	  regY = 1;
	  ClrN;
	}
      else
	{
	  regY = 170;
	  SetN;
	}
      break;
    default :
      regY = 163;
      SetN;
      break;
    }
}

void Device_HHCLOS (void)
{
  if (devbug)
    printf ("HHCLOS\n");

  fid = memory[0x2e] >> 4;

  if (fp[fid])
    {
      fclose (fp[fid]);
      fp[fid] = NULL;
    }

  regY = 1;
  ClrN;
}

void Device_HHREAD (void)
{
  if (devbug)
    printf ("HHREAD\n");

  fid = memory[0x2e] >> 4;

  if (fp[fid])
    {
      int ch;

      ch = fgetc (fp[fid]);
      if (ch != EOF)
	{
	  if (flag[fid])
	    {
	      switch (ch)
		{
		case '\n' :
		  ch = 0x9b;
		  break;
		default :
		  break;
		}
	    }

	  regA = ch;
	  regY = 1;
	  ClrN;
	}
      else
	{
	  regY = 136;
	  SetN;
	}
    }
  else
    {
      regY = 163;
      SetN;
    }
}

void Device_HHWRIT (void)
{
  if (devbug)
    printf ("HHWRIT\n");

  fid = memory[0x2e] >> 4;

  if (fp[fid])
    {
      int ch;

      ch = regA;
      if (flag[fid])
	{
	  switch (ch)
	    {
	    case 0x9b :
	      ch = 0x0a;
	      break;
	    default :
	      break;
	    }
	}
      fputc (ch, fp[fid]);
      regY = 1;
      ClrN;
    }
  else
    {
      regY = 163;
      SetN;
    }
}

void Device_HHSTAT (void)
{
  if (devbug)
    printf ("HHSTAT\n");

  fid = memory[0x2e] >> 4;

  regY = 146;
  SetN;
}

void Device_HHSPEC (void)
{
  if (devbug)
    printf ("HHSPEC\n");

  fid = memory[0x2e] >> 4;

  switch (memory[ICCOMZ])
    {
    case 0x20 :
      printf ("RENAME Command\n");
      break;
    case 0x21 :
      printf ("DELETE Command\n");
      break;
    case 0x23 :
      printf ("LOCK Command\n");
      break;
    case 0x24 :
      printf ("UNLOCK Command\n");
      break;
    case 0x25 :
      printf ("NOTE Command\n");
      break;
    case 0x26 :
      printf ("POINT Command\n");
      break;
    case 0xFE :
      printf ("FORMAT Command\n");
      break;
    default :
      printf ("UNKNOWN Command\n");
      break;
    }

  regY = 146;
  SetN;
}

void Device_HHINIT (void)
{
  if (devbug)
    printf ("HHINIT\n");
}

static int phfd = -1;
void Device_PHCLOS (void);
static char *spool_file = NULL;

void Device_PHOPEN (void)
{
  if (devbug)
    printf ("PHOPEN\n");

  if (phfd != -1)
    Device_PHCLOS ();

  spool_file = tmpnam (NULL);
  phfd = open (spool_file, O_CREAT | O_TRUNC | O_WRONLY, 0777);
  if (phfd != -1)
    {
	regY = 1;
	ClrN;
    }
  else
    {
	regY = 130;
	SetN;
    }
}

void Device_PHCLOS (void)
{
  if (devbug)
    printf ("PHCLOS\n");

  if (phfd != -1)
    {
      char command[256];
      int status;

      close (phfd);

      sprintf (command, print_command, spool_file);
      system (command);

#ifndef VMS
      status = unlink (spool_file);
      if (status == -1)
	{
	  perror (spool_file);
	  exit (1);
	}
#endif

      phfd = -1;
    }

  regY = 1;
  ClrN;
}

void Device_PHREAD (void)
{
  if (devbug)
    printf ("PHREAD\n");

  regY = 146;
  SetN;
}

void Device_PHWRIT (void)
{
  unsigned char byte;
  int status;

  if (devbug)
    printf ("PHWRIT\n");

  byte = regA;
  if (byte == 0x9b)
    byte = '\n';

  status = write (phfd, &byte, 1);
  if (status == 1)
    {
      regY = 1;
      ClrN;
    }
  else
    {
      regY = 144;
      SetN;
    }
}

void Device_PHSTAT (void)
{
  if (devbug)
    printf ("PHSTAT\n");
}

void Device_PHSPEC (void)
{
  if (devbug)
    printf ("PHSPEC\n");

  regY = 1;
  ClrN;
}

void Device_PHINIT (void)
{
  if (devbug)
    printf ("PHINIT\n");

  phfd = -1;
  regY = 1;
  ClrN;
}
