openssl/crypto/bio/b_print.c

/* crypto/bio/b_print.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

/* 
 * Stolen from tjh's ssl/ssl_trc.c stuff.
 */

#include <stdio.h>
#include <stdarg.h>
#include "cryptlib.h"
#include <openssl/bio.h>

static void dopr (char *buffer, size_t maxlen, const char *format, 
                  va_list args);

int BIO_printf (BIO *bio, ...)
	{
	va_list args;
	char *format;
	int ret;
	MS_STATIC char hugebuf[1024*2]; /* 10k in one chunk is the limit */

	va_start(args, bio);
	format=va_arg(args, char *);

	hugebuf[0]='\0';

	dopr(hugebuf, sizeof(hugebuf), format, args);

	ret=BIO_write(bio,hugebuf,strlen(hugebuf));

	va_end(args);
	return(ret);
	}

/*
 * Copyright Patrick Powell 1995
 * This code is based on code written by Patrick Powell (papowell@astart.com)
 * It may be used for any purpose as long as this notice remains intact
 * on all source code distributions
 */

#include <string.h>
#include <ctype.h>
#include <sys/types.h>
#include <stdarg.h>

static void fmtstr (char *buffer, size_t *currlen, size_t maxlen,
		    char *value, int flags, int min, int max);
static void fmtint (char *buffer, size_t *currlen, size_t maxlen,
		    long value, int base, int min, int max, int flags);
static void fmtfp (char *buffer, size_t *currlen, size_t maxlen,
		   long double fvalue, int min, int max, int flags);
static void dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c );

/*
 * dopr(): poor man's version of doprintf
 */

/* format read states */
#define DP_S_DEFAULT 0
#define DP_S_FLAGS   1
#define DP_S_MIN     2
#define DP_S_DOT     3
#define DP_S_MAX     4
#define DP_S_MOD     5
#define DP_S_CONV    6
#define DP_S_DONE    7

/* format flags - Bits */
#define DP_F_MINUS 	(1 << 0)
#define DP_F_PLUS  	(1 << 1)
#define DP_F_SPACE 	(1 << 2)
#define DP_F_NUM   	(1 << 3)
#define DP_F_ZERO  	(1 << 4)
#define DP_F_UP    	(1 << 5)
#define DP_F_UNSIGNED 	(1 << 6)

/* Conversion Flags */
#define DP_C_SHORT   1
#define DP_C_LONG    2
#define DP_C_LDOUBLE 3

#define char_to_int(p) (p - '0')
#define MAX(p,q) ((p >= q) ? p : q)

static void dopr (char *buffer, size_t maxlen, const char *format, va_list args)
{
  char ch;
  long value;
  long double fvalue;
  char *strvalue;
  int min;
  int max;
  int state;
  int flags;
  int cflags;
  size_t currlen;
  
  state = DP_S_DEFAULT;
  currlen = flags = cflags = min = 0;
  max = -1;
  ch = *format++;

  while (state != DP_S_DONE)
  {
    if ((ch == '\0') || (currlen >= maxlen)) 
      state = DP_S_DONE;

    switch(state) 
    {
    case DP_S_DEFAULT:
      if (ch == '%') 
	state = DP_S_FLAGS;
      else 
	dopr_outch (buffer, &currlen, maxlen, ch);
      ch = *format++;
      break;
    case DP_S_FLAGS:
      switch (ch) 
      {
      case '-':
	flags |= DP_F_MINUS;
        ch = *format++;
	break;
      case '+':
	flags |= DP_F_PLUS;
        ch = *format++;
	break;
      case ' ':
	flags |= DP_F_SPACE;
        ch = *format++;
	break;
      case '#':
	flags |= DP_F_NUM;
        ch = *format++;
	break;
      case '0':
	flags |= DP_F_ZERO;
        ch = *format++;
	break;
      default:
	state = DP_S_MIN;
	break;
      }
      break;
    case DP_S_MIN:
      if (isdigit((unsigned char)ch)) 
      {
	min = 10*min + char_to_int (ch);
	ch = *format++;
      } 
      else if (ch == '*') 
      {
	min = va_arg (args, int);
	ch = *format++;
	state = DP_S_DOT;
      } 
      else 
	state = DP_S_DOT;
      break;
    case DP_S_DOT:
      if (ch == '.') 
      {
	state = DP_S_MAX;
	ch = *format++;
      } 
      else 
	state = DP_S_MOD;
      break;
    case DP_S_MAX:
      if (isdigit((unsigned char)ch)) 
      {
	if (max < 0)
	  max = 0;
	max = 10*max + char_to_int (ch);
	ch = *format++;
      } 
      else if (ch == '*') 
      {
	max = va_arg (args, int);
	ch = *format++;
	state = DP_S_MOD;
      } 
      else 
	state = DP_S_MOD;
      break;
    case DP_S_MOD:
      /* Currently, we don't support Long Long, bummer */
      switch (ch) 
      {
      case 'h':
	cflags = DP_C_SHORT;
	ch = *format++;
	break;
      case 'l':
	cflags = DP_C_LONG;
	ch = *format++;
	break;
      case 'L':
	cflags = DP_C_LDOUBLE;
	ch = *format++;
	break;
      default:
	break;
      }
      state = DP_S_CONV;
      break;
    case DP_S_CONV:
      switch (ch) 
      {
      case 'd':
      case 'i':
	if (cflags == DP_C_SHORT) 
	  value = va_arg (args, short int);
	else if (cflags == DP_C_LONG)
	  value = va_arg (args, long int);
	else
	  value = va_arg (args, int);
	fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
	break;
      case 'o':
	flags |= DP_F_UNSIGNED;
	if (cflags == DP_C_SHORT)
	  value = va_arg (args, unsigned short int);
	else if (cflags == DP_C_LONG)
	  value = va_arg (args, unsigned long int);
	else
	  value = va_arg (args, unsigned int);
	fmtint (buffer, &currlen, maxlen, value, 8, min, max, flags);
	break;
      case 'u':
	flags |= DP_F_UNSIGNED;
	if (cflags == DP_C_SHORT)
	  value = va_arg (args, unsigned short int);
	else if (cflags == DP_C_LONG)
	  value = va_arg (args, unsigned long int);
	else
	  value = va_arg (args, unsigned int);
	fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
	break;
      case 'X':
	flags |= DP_F_UP;
      case 'x':
	flags |= DP_F_UNSIGNED;
	if (cflags == DP_C_SHORT)
	  value = va_arg (args, unsigned short int);
	else if (cflags == DP_C_LONG)
	  value = va_arg (args, unsigned long int);
	else
	  value = va_arg (args, unsigned int);
	fmtint (buffer, &currlen, maxlen, value, 16, min, max, flags);
	break;
      case 'f':
	if (cflags == DP_C_LDOUBLE)
	  fvalue = va_arg (args, long double);
	else
	  fvalue = va_arg (args, double);
	/* um, floating point? */
	fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags);
	break;
      case 'E':
	flags |= DP_F_UP;
      case 'e':
	if (cflags == DP_C_LDOUBLE)
	  fvalue = va_arg (args, long double);
	else
	  fvalue = va_arg (args, double);
	break;
      case 'G':
	flags |= DP_F_UP;
      case 'g':
	if (cflags == DP_C_LDOUBLE)
	  fvalue = va_arg (args, long double);
	else
	  fvalue = va_arg (args, double);
	break;
      case 'c':
	dopr_outch (buffer, &currlen, maxlen, va_arg (args, int));
	break;
      case 's':
	strvalue = va_arg (args, char *);
	if (max < 0) 
	  max = maxlen; /* ie, no max */
	fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max);
	break;
      case 'p':
	strvalue = va_arg (args, void *);
	fmtint (buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags);
	break;
      case 'n':
	if (cflags == DP_C_SHORT) 
	{
	  short int *num;
	  num = va_arg (args, short int *);
	  *num = currlen;
        } 
	else if (cflags == DP_C_LONG) 
	{
	  long int *num;
	  num = va_arg (args, long int *);
	  *num = currlen;
        } 
	else 
	{
	  int *num;
	  num = va_arg (args, int *);
	  *num = currlen;
        }
	break;
      case '%':
	dopr_outch (buffer, &currlen, maxlen, ch);
	break;
      case 'w':
	/* not supported yet, treat as next char */
	ch = *format++;
	break;
      default:
	/* Unknown, skip */
	break;
      }
      ch = *format++;
      state = DP_S_DEFAULT;
      flags = cflags = min = 0;
      max = -1;
      break;
    case DP_S_DONE:
      break;
    default:
      /* hmm? */
      break; /* some picky compilers need this */
    }
  }
  if (currlen < maxlen - 1) 
    buffer[currlen] = '\0';
  else 
    buffer[maxlen - 1] = '\0';
}

static void fmtstr (char *buffer, size_t *currlen, size_t maxlen,
		    char *value, int flags, int min, int max)
{
  int padlen, strln;     /* amount to pad */
  int cnt = 0;
  
  if (value == 0)
  {
    value = "<NULL>";
  }

  for (strln = 0; value[strln]; ++strln); /* strlen */
  padlen = min - strln;
  if (padlen < 0) 
    padlen = 0;
  if (flags & DP_F_MINUS) 
    padlen = -padlen; /* Left Justify */

  while ((padlen > 0) && (cnt < max)) 
  {
    dopr_outch (buffer, currlen, maxlen, ' ');
    --padlen;
    ++cnt;
  }
  while (*value && (cnt < max)) 
  {
    dopr_outch (buffer, currlen, maxlen, *value++);
    ++cnt;
  }
  while ((padlen < 0) && (cnt < max)) 
  {
    dopr_outch (buffer, currlen, maxlen, ' ');
    ++padlen;
    ++cnt;
  }
}

/* Have to handle DP_F_NUM (ie 0x and 0 alternates) */

static void fmtint (char *buffer, size_t *currlen, size_t maxlen,
		    long value, int base, int min, int max, int flags)
{
  int signvalue = 0;
  unsigned long uvalue;
  char convert[20];
  int place = 0;
  int spadlen = 0; /* amount to space pad */
  int zpadlen = 0; /* amount to zero pad */
  int caps = 0;
  
  if (max < 0)
    max = 0;

  uvalue = value;

  if(!(flags & DP_F_UNSIGNED))
  {
    if( value < 0 ) {
      signvalue = '-';
      uvalue = -value;
    }
    else
      if (flags & DP_F_PLUS)  /* Do a sign (+/i) */
	signvalue = '+';
    else
      if (flags & DP_F_SPACE)
	signvalue = ' ';
  }
  
  if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */

  do {
    convert[place++] =
      (caps? "0123456789ABCDEF":"0123456789abcdef")
      [uvalue % (unsigned)base  ];
    uvalue = (uvalue / (unsigned)base );
  } while(uvalue && (place < 20));
  if (place == 20) place--;
  convert[place] = 0;

  zpadlen = max - place;
  spadlen = min - MAX (max, place) - (signvalue ? 1 : 0);
  if (zpadlen < 0) zpadlen = 0;
  if (spadlen < 0) spadlen = 0;
  if (flags & DP_F_ZERO)
  {
    zpadlen = MAX(zpadlen, spadlen);
    spadlen = 0;
  }
  if (flags & DP_F_MINUS) 
    spadlen = -spadlen; /* Left Justifty */

#ifdef DEBUG_SNPRINTF
  dprint (1, (debugfile, "zpad: %d, spad: %d, min: %d, max: %d, place: %d\n",
      zpadlen, spadlen, min, max, place));
#endif

  /* Spaces */
  while (spadlen > 0) 
  {
    dopr_outch (buffer, currlen, maxlen, ' ');
    --spadlen;
  }

  /* Sign */
  if (signvalue) 
    dopr_outch (buffer, currlen, maxlen, signvalue);

  /* Zeros */
  if (zpadlen > 0) 
  {
    while (zpadlen > 0)
    {
      dopr_outch (buffer, currlen, maxlen, '0');
      --zpadlen;
    }
  }

  /* Digits */
  while (place > 0) 
    dopr_outch (buffer, currlen, maxlen, convert[--place]);
  
  /* Left Justified spaces */
  while (spadlen < 0) {
    dopr_outch (buffer, currlen, maxlen, ' ');
    ++spadlen;
  }
}

static long double abs_val (long double value)
{
  long double result = value;

  if (value < 0)
    result = -value;

  return result;
}

static long double pow10 (int exp)
{
  long double result = 1;

  while (exp)
  {
    result *= 10;
    exp--;
  }
  
  return result;
}

static long round (long double value)
{
  long intpart;

  intpart = value;
  value = value - intpart;
  if (value >= 0.5)
    intpart++;

  return intpart;
}

static void fmtfp (char *buffer, size_t *currlen, size_t maxlen,
		   long double fvalue, int min, int max, int flags)
{
  int signvalue = 0;
  long double ufvalue;
  char iconvert[20];
  char fconvert[20];
  int iplace = 0;
  int fplace = 0;
  int padlen = 0; /* amount to pad */
  int zpadlen = 0; 
  int caps = 0;
  long intpart;
  long fracpart;
  
  /* 
   * AIX manpage says the default is 0, but Solaris says the default
   * is 6, and sprintf on AIX defaults to 6
   */
  if (max < 0)
    max = 6;

  ufvalue = abs_val (fvalue);

  if (fvalue < 0)
    signvalue = '-';
  else
    if (flags & DP_F_PLUS)  /* Do a sign (+/i) */
      signvalue = '+';
    else
      if (flags & DP_F_SPACE)
	signvalue = ' ';

#if 0
  if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
#endif

  intpart = ufvalue;

  /* 
   * Sorry, we only support 9 digits past the decimal because of our 
   * conversion method
   */
  if (max > 9)
    max = 9;

  /* We "cheat" by converting the fractional part to integer by
   * multiplying by a factor of 10
   */
  fracpart = round ((pow10 (max)) * (ufvalue - intpart));

  if (fracpart >= pow10 (max))
  {
    intpart++;
    fracpart -= pow10 (max);
  }

#ifdef DEBUG_SNPRINTF
  dprint (1, (debugfile, "fmtfp: %f =? %d.%d\n", fvalue, intpart, fracpart));
#endif

  /* Convert integer part */
  do {
    iconvert[iplace++] =
      (caps? "0123456789ABCDEF":"0123456789abcdef")[intpart % 10];
    intpart = (intpart / 10);
  } while(intpart && (iplace < 20));
  if (iplace == 20) iplace--;
  iconvert[iplace] = 0;

  /* Convert fractional part */
  do {
    fconvert[fplace++] =
      (caps? "0123456789ABCDEF":"0123456789abcdef")[fracpart % 10];
    fracpart = (fracpart / 10);
  } while(fracpart && (fplace < 20));
  if (fplace == 20) fplace--;
  fconvert[fplace] = 0;

  /* -1 for decimal point, another -1 if we are printing a sign */
  padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0); 
  zpadlen = max - fplace;
  if (zpadlen < 0)
    zpadlen = 0;
  if (padlen < 0) 
    padlen = 0;
  if (flags & DP_F_MINUS) 
    padlen = -padlen; /* Left Justifty */

  if ((flags & DP_F_ZERO) && (padlen > 0)) 
  {
    if (signvalue) 
    {
      dopr_outch (buffer, currlen, maxlen, signvalue);
      --padlen;
      signvalue = 0;
    }
    while (padlen > 0)
    {
      dopr_outch (buffer, currlen, maxlen, '0');
      --padlen;
    }
  }
  while (padlen > 0)
  {
    dopr_outch (buffer, currlen, maxlen, ' ');
    --padlen;
  }
  if (signvalue) 
    dopr_outch (buffer, currlen, maxlen, signvalue);

  while (iplace > 0) 
    dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]);

  /*
   * Decimal point.  This should probably use locale to find the correct
   * char to print out.
   */
  dopr_outch (buffer, currlen, maxlen, '.');

  while (fplace > 0) 
    dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]);

  while (zpadlen > 0)
  {
    dopr_outch (buffer, currlen, maxlen, '0');
    --zpadlen;
  }

  while (padlen < 0) 
  {
    dopr_outch (buffer, currlen, maxlen, ' ');
    ++padlen;
  }
}

static void dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c)
{
  if (*currlen < maxlen)
    buffer[(*currlen)++] = c;
}