/* ************************************************** */
/* file io.c:  contains most input/output functions   */
/*                                                    */
/* Copyright (c) 1990-96 by Donald R. Tveter          */
/*                                                    */
/* ************************************************** */

#ifdef INTEGER
#include "ibp.h"
#else
#include "rbp.h"
#endif

#if defined(UNIX) && defined(HOTKEYS)

#ifdef BSD
struct termios raw;    /* characteristics for hotkeys */
struct termios noraw;  /* original characteristics */
#elif defined NEXT
struct sgttyb raw;     /* characteristics for hotkeys */
struct sgttyb noraw;   /* original characteristics */
#else /* the System V solution */
struct termio raw;    /* characteristics for hotkeys */
struct termio noraw;  /* original characteristics */
#endif

char onechar[1];      /* the buffer for the hotkey character */
#endif

extern UNIT *locateunit();
extern WTTYPE userscaleup();

extern char buffer[], outstr[], *inputfile, sysstr[];
extern char copyflag,deriv,*datafile,echo,informat;
extern char outformat, probtype, update, *wtfile, wtformat, zeroderiv;
extern char offby1, ringbell, up_to_date_stats, summary, biasset;
extern char wtlimithit, runningflag, seednote;
extern char saveonminimum, wtfilename[], trfiles[];
extern char recurinit;
extern int bufferend, bufferptr, filestackptr, format[];
extern int filetimes[], wtfilecount, timestoread, maxiter;
extern FILE *data, *filestack[];
extern LAYER *last, *start;
extern int extraconnect,ioconnects,lastsave,pagesize,pccnet,prevnpats;
extern int readerror, readingpattern, totaliter;
extern int printrate, saverate;
extern int lineno, stmsize;
extern long iotime;
extern short nlayers;
extern WTTYPE unknown, toler, toosmall, stdthresh;
extern WTTYPE initrange, kickrange, kicksize;
extern WTTYPE alpha, eta, eta2;
extern WTTYPE decay, dbdeta, kappa, etamax, theta1;
extern WTTYPE qpeta, qpnoise, mu;
extern WTTYPE classoff, classon;
extern WTTYPE hbiasact, obiasact;
extern char qpslope;
extern FILE *copy;
extern REAL qpdecayh, qpdecayo;
extern REAL toloverall, minimumsofar;
extern DATA s[2][2];
extern WTTYPE Dh, Do;
extern char ah, ao;
extern int wtsinuse, wttotal;
extern char incrementseed;
extern unsigned seed;
extern SEEDNODE *seedstart;

#if defined(UNIX) && defined(HOTKEYS)

#ifdef BSD
void initraw()
{
 int i;
 tcgetattr(0,&noraw);
 raw.c_iflag = noraw.c_iflag;
 raw.c_oflag = noraw.c_oflag;
 raw.c_cflag = noraw.c_cflag;
 raw.c_lflag = noraw.c_lflag & ~ ECHO;
 raw.c_lflag = raw.c_lflag & ~ ICANON;
 for (i=0;i<NCCS;i++) raw.c_cc[i] = noraw.c_cc[i];
 raw.c_cc[VMIN] = 1;
 raw.c_cc[VTIME] = 0;
 raw.c_ispeed = noraw.c_ispeed;
 raw.c_ospeed = noraw.c_ospeed;
}

void setraw()
{
 tcsetattr(0,TCSANOW,&raw);
}

void setnoraw()
{
 tcsetattr(0,TCSANOW,&noraw);
}

#elif defined NEXT
void initraw()
{
 ioctl(0,TIOCGETD,&noraw);
 raw.sg_ispeed = noraw.sg_ispeed;
 raw.sg_ospeed = noraw.sg_ospeed;
 raw.sg_erase = noraw.sg_erase;
 raw.sg_kill = noraw.sg_kill;
 raw.sg_flags = noraw.sg_flags & 0000040;   /* turn on raw mode */
}

void setraw()
{
 ioctl(0,TIOCSETD,&raw);
}

void setnoraw()
{
 ioctl(0,TIOCSETD,&noraw);
}

#else /* System V code */
void initraw()
{
 int i;
 ioctl(0,TCGETA,&noraw);
 raw.c_iflag = noraw.c_iflag;
 raw.c_oflag = noraw.c_oflag;
 raw.c_cflag = noraw.c_cflag;
 raw.c_lflag = noraw.c_lflag & ~ 0x02;   /* hot key bit */
 raw.c_lflag = raw.c_lflag & ~ 010;      /* echo bit */
 raw.c_line = noraw.c_line;
 for (i=0;i<=7;i++) raw.c_cc[i] = noraw.c_cc[i];
 raw.c_cc[4] = 1;
}

void setraw()
{
 ioctl(0,TCSETA,&raw);
}

void setnoraw()
{
 ioctl(0,TCSETA,&noraw);
}
#endif /* end of the System V code */

int getch()
{
 int ch;
 setraw();
 do ch = read(0,onechar,1); while (ch != 1);
 setnoraw();
 return(onechar[0]);
}
#endif  /* end of the if defined(UNIX) ... code */

#ifdef INTEGER
short scale(x)     /* returns x as a scaled 16-bit value */
REAL x;
{
 short s;

if (x > 31.999 || x < -32.0)
 {
  sprintf(outstr,"magnitude of %f is too large for the integer",x);
  pg(stdout,outstr);
  pg(stdout," representation\n");
  readerror = 1;
  if (x > 31.999) return(MAXSHORT); else return(MINSHORT);
 };
if (x > 0.0) s = x * 1024 + 0.5;
else s = x * 1024 - 0.5;
if (x != 0.0 && s == 0)
 {
  sprintf(outstr,"warning:  magnitude of %f is too small for",x);
  pg(stdout,outstr);
  pg(stdout," the integer representation\n");
  return(0);
 };
return(s);
}

REAL unscale(x)  /* returns the REAL value of short x */
short x;
{return((REAL) x / 1024.0);}

REAL unscaleint(x)  /* returns the REAL value of INT32 x */
INT32 x;
{ return((REAL) x / 1024.0); }

#endif

int pushfile(filename,timestoread)
char *filename;
int timestoread;
{
FILE *file;

bufferptr = 0;
bufferend = 0;
buffer[0] = '\n';
file = fopen(filename,"r");
if (file == NULL)
 {
  sprintf(outstr,"cannot open:  %s\n",filename); pg(stdout,outstr);
  return(0);
 };
filestackptr = filestackptr + 1;
if (filestackptr > MAXFILES)
 {
  pg(stdout,"can't stack up any more files\n");
  filestackptr = filestackptr - 1;
  fclose(file);
  return(0);
 };
filestack[filestackptr] = file;
filetimes[filestackptr] = timestoread;
data = file;
return(1);
} 

void popfile()
{
bufferptr = 0;
bufferend = 0;
buffer[0] = '\n';
if (s[TOL][TRAIN].wrong == 0) /* break the "loop" */
   filetimes[filestackptr] = 1;
filetimes[filestackptr] = filetimes[filestackptr] - 1;
if (filetimes[filestackptr] > 0) rewind(data);
else if (filestackptr > 0)
 {
  fclose(data);
  filestackptr = filestackptr - 1;
 }
else pg(stdout,"\nunexpected EOF:  to quit the program, type q\n");
data = filestack[filestackptr];
}

int readch() /* returns the next character in the input buffer */
{ 
 int i, ch2;

if (bufferptr > bufferend) /* then read next line into buffer */
 {
#ifdef HOTKEYS
  if (data == stdin)
   {
    ch2 = getch();
    if (ch2 <= 26 || (ch2 >= 63 && ch2 <= 90)) /* HOTKEY characters */
     {
      if (ch2 == 2) buffer[0] = 'b';
      else if (ch2 == 9) buffer[0] = 'i';
      else if (ch2 == 18) buffer[0] = 'r';
      else buffer[0] = ch2;
      buffer[1] = '\n';
      buffer[2] = '\0';
      i = 1;
      printf("%s",buffer); 
      goto entryfromhotkeys;
     }
    else /* all other characters */
     {
      putchar(ch2);
      i = 0;
      buffer[i] = ch2;
#ifdef UNIX
      while (ch2 != '\n' && i < (BUFFSIZE-1))
#else
      while (ch2 != 13 && i < (BUFFSIZE-1))
#endif
       {
        ch2 = getch();
        if (ch2 == 8 && i >= 0)
         {
          i = i - 1;
          putchar(8);
         }
        else if (ch2 == 8) {/* do nothing */}
#ifdef UNIX
        else if (ch2 != '\n')
#else
        else if (ch2 != 13)
#endif
         {
          putchar(ch2);
          i = i + 1;
          buffer[i] = ch2;
         };
       };
      putchar('\n');
      i = i + 1;
      goto entryfromhotkeys;
     };
   }
  else
#endif
  ch2 = getc(data);
  if (ch2 == EOF) return(ch2);
  i = 0;
  while(ch2 != '\n' && i < (BUFFSIZE-1))
   {
#ifdef UNIX
    if (ch2 == 13) ch2 = ' '; /* turn a ctrl-M into a blank */
#endif
    if (ch2 == '\t') ch2 = ' ';
    buffer[i] = ch2;
    i = i + 1;
    ch2 = getc(data);
   };
entryfromhotkeys:
  if (i == (BUFFSIZE-1)) pg(stdout,"line too long\n");
  buffer[i] = '\n';
  buffer[i+1] = '\0';
  bufferend = i;
  bufferptr = 0;
  if (echo == '+') for(i = 0; i <= bufferend; i++) putchar(buffer[i]);
  if (copy && ((data == stdin) || (echo == '+')))
   for (i=0;i<=bufferend;i++) putc(buffer[i],copy);
 }
ch2 = buffer[bufferptr];
bufferptr = bufferptr + 1;
return(ch2);
}

void texterror()
{
pg(stdout,"unexpected text:  ");
pg(stdout,&buffer[bufferptr-1]);
bufferptr = bufferend;
}

char *readstr()
{
short i,start,end;
char *addr, *addr2;
i = bufferptr;
while (buffer[i] == ' ') i = i + 1;
start = i;
while (buffer[i] != ' ' && buffer[i] != '\n') i = i + 1;
end = i-1;
addr = (char *) malloc((int) end-start+2);
addr2 = addr;
for (i=start;i<=end;i++) *addr++ = buffer[i];
bufferptr = end + 1;
*addr = '\0';
return(addr2);
}

int scanfordigit()
{
int sign, ch2;

sign = 1;

restart:
do ch2 = readch(); while (ch2 == ' ' || ch2 == '\n');
if ((ch2 >= '0' && ch2 <= '9') || ch2 == '.')
 {
  bufferptr = bufferptr - 1;
  return(sign);
 };
          switch (ch2) {
case '}': readerror = 3;
          return(0);
case EOF: readerror = 2;
          return(0);
case '*': while (ch2 != '\n') ch2 = readch();
          goto restart;
case '-': sign = -sign;
          goto restart;
case 'h':
case 'x':
case 'X':
case 'H':
case 'd':
case 's': bufferptr = bufferptr - 1;
          return(0);
default:  readerror = 1;
          return(0);
          };
}

int readint(min,max,command)
int min, max;
char command;
{