xref: /gem5/system/alpha/console/printf.c

/*
Copyright 1993, 1994 Hewlett-Packard Development Company, L.P.

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

#ifndef LINT
static char *rcsid = "$Id: printf.c,v 1.1.1.1 1997/10/30 23:27:12 verghese Exp $";
#endif

/*
 * $Log: printf.c,v $
 * Revision 1.1.1.1  1997/10/30 23:27:12  verghese
 * current 10/29/97
 *
 * Revision 1.1  1995/06/26  21:09:35  berc
 * Initial revision
 *
 * Revision 1.8  1994/10/06  20:29:08  fdh
 * Corrected unsigned long declaration.
 *
 * Revision 1.7  1994/08/05  20:16:23  fdh
 * Updated Copyright header and RCS $Id: identifier.
 *
 * Revision 1.6  1994/06/21  15:41:54  rusling
 * fixedup WNT compiler warnings
 *
 * Revision 1.5  1994/06/17  19:35:37  fdh
 * Clean-up...
 *
 * Revision 1.4  1994/01/19  10:40:08  rusling
 * Ported to Alpha Windows NT.
 *
 * Revision 1.3  1993/11/02  21:57:45  fdh
 * Fixed sign extension problem introduced in version 1.2
 *
 * Revision 1.2  1993/10/13  15:29:02  rusling
 * Added floating point support in printf.  This meant adding variable arguments to
 * it and FormatItem() and including stdarg.h.
 *
 * Revision 1.1  1993/06/08  19:56:24  fdh
 * Initial revision
 *
 */



/* printf.c
   L. S.
   Sun Feb 10 20:18:22 1985
 */

//#include "system.h"
#include "lib.h"
#include <stdarg.h>





/* The string s is terminated by a '\0' */
void
PutString(const char *s)
{
  while (*s) PutChar(*s++);
}

/* print c count times */
void
PutRepChar(char c, int count)
{
  while (count--) PutChar(c);
}

/* put string reverse */
void
PutStringReverse(const char *s, int index)
{
  while ((index--) > 0) PutChar(s[index]);
}

/* prints value in radix, in a field width width, with fill
   character fill
   if radix is negative, print as signed quantity
   if width is negative, left justify
   if width is 0, use whatever is needed
   if fill is 0, use ' '
 */
void
PutNumber(sl value, int radix, int width, char fill)
{
  char buffer[40];
  ui bufferindex = 0;
  ul uvalue;
  uw digit;
  uw left = FALSE;
  uw negative = FALSE;

  if (fill == 0) fill = ' ';

  if (width < 0) {
    width = -width;
    left = TRUE;
    }
  if (width < 0 || width > 80) width = 0;

  if (radix < 0) {
    radix = -radix;
    if (value < 0) {
      negative = TRUE;
      value = -value;
      }
    }
  switch (radix) {
    case 8:
    case 10:
    case 16: break;
    default: {
      PutString("****");
      return;
      }
    }
  uvalue = value;
  do {
    if (radix != 16)
    {
      digit = (uw)(uvalue % radix);
      uvalue /= radix;
    }
    else
    {
      digit = (uw)(uvalue & 0xf);
      uvalue = uvalue >> 4;
    }
    buffer[bufferindex] = digit + ((digit <= 9) ? '0' : ('A' - 10));
    bufferindex += 1;
    } while (uvalue != 0);
  /* fill # ' ' and negative cannot happen at once */
  if (negative) {
    buffer[bufferindex] = '-';
    bufferindex += 1;
    }
  if ((ui)width <= bufferindex) PutStringReverse(buffer, bufferindex);
  else {
    width -= bufferindex;
    if (!left) PutRepChar(fill, width);
    PutStringReverse(buffer, bufferindex);
    if (left) PutRepChar(fill, width);
    }
}

ul power(long base, long n)
{
  ul p;

  for (p = 1; n > 0; --n)
    p = p * base;
  return p;
}

void putFloat(double a, int fieldwidth, char fill)
{
  int i;
  ul b;

/*
 *  Put out everything before the decimal place.
 */
  PutNumber(((ul) a), 10, fieldwidth, fill);
/*
 *  Output the decimal place.
 */
  PutChar('.' & 0x7f);
/*
 *  Output the n digits after the decimal place.
 */
   for (i = 1; i < 6; i++) {
     b = (ul)(power(10, i) * (double)(a - (ul) a));
     PutChar((char)(b % 10) + '0');
   }
}
const char *
FormatItem(const char *f, va_list *ap)
{
  char c;
  int fieldwidth = 0;
  int leftjust = FALSE;
  int radix = 0;
  char fill = ' ';
  if (*f == '0') fill = '0';
  while (c = *f++) {
    if (c >= '0' && c <= '9') {
      fieldwidth = (fieldwidth * 10) + (c - '0');
      }
    else switch (c) {
      case '\000': return(--f);
      case '%': PutChar('%');
        return(f);
      case '-': leftjust = TRUE;
        break;
      case 'c': {
        char a = va_arg(*ap, char *);

        if (leftjust) PutChar(a & 0x7f);
        if (fieldwidth > 0) PutRepChar(fill, fieldwidth - 1);
        if (!leftjust) PutChar(a & 0x7f);
        return(f);
        }
      case 's': {
        const char *a = va_arg(*ap, const char *);

        if (leftjust) PutString((const char *) a);
        if (fieldwidth > strlen((const char *) a))
          PutRepChar(fill, fieldwidth - strlen((const char *)a));
        if (!leftjust) PutString((const char *) a);
        return(f);
        }
      case 'd': radix = -10;
        break;
      case 'u': radix = 10;
        break;
      case 'x': radix = 16;
        break;
      case 'X': radix = 16;
        break;
      case 'o': radix = 8;
        break;
      case 'f': {
        double a = va_arg(*ap, double);

        putFloat(a, fieldwidth, fill);
        return(f);
      }
      default:   /* unknown switch! */
        radix = 3;
        break;
      }
    if (radix) break;
    }
  if (leftjust) fieldwidth = -fieldwidth;
  {
     sl a = va_arg(*ap, sl);
     PutNumber(a, radix, fieldwidth, fill);
  }
  return(f);
}

int
printf(const char *f, ...)
{
  va_list ap;

  va_start(ap, f);

  while (*f) {
    if (*f == '%') f = FormatItem(f + 1, &ap);
    else PutChar(*f++);
  }

  if (*(f-1)=='\n') {
     /* add a line-feed (SimOS console output goes to shell */
     PutChar('\r');
  }

  va_end(ap);         /* clean up */
  return 0;
}

void
panic(const char *f, ...)
{
  va_list ap;

  va_start(ap, f);

  printf("CONSOLE PANIC (looping): ");
  while (*f) {
    if (*f == '%') f = FormatItem(f + 1, &ap);
    else PutChar(*f++);
    }

  va_end(ap);         /* clean up */
  while(1);
}