/*
 * $Id: snprintf.c,v 1.18 2001/01/07 10:57:14 hno Exp $
 */

/* ====================================================================
 * Copyright (c) 1995-1997 The Apache Group.  All rights reserved.
 *
 * 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 above 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 acknowledgment:
 *    "This product includes software developed by the Apache Group
 *    for use in the Apache HTTP server project (http://www.apache.org/)."
 *
 * 4. The names "Apache Server" and "Apache Group" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission.
 *
 * 5. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the Apache Group
 *    for use in the Apache HTTP server project (http://www.apache.org/)."
 *
 * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
 * EXPRESSED 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 APACHE GROUP OR
 * ITS 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Group and was originally based
 * on public domain software written at the National Center for
 * Supercomputing Applications, University of Illinois, Urbana-Champaign.
 * For more information on the Apache Group and the Apache HTTP server
 * project, please see <http://www.apache.org/>.
 *
 * This code is based on, and used with the permission of, the
 * SIO stdio-replacement strx_* functions by Panos Tsirigotis
 * <panos@alumni.cs.colorado.edu> for xinetd.
 */

#include "config.h"
#if !HAVE_SNPRINTF || !HAVE_VSNPRINTF

#include "defines.h"

#include <stdio.h>
#include <ctype.h>
#include <sys/types.h>
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include <assert.h>


/* #Default:
   # request_header_max_size 10 KB
*/
#define MAX_S_STRING_LENGTH 12288 /* 12k */

extern void fatal(const char *message);
extern int debugLevels[MAX_DEBUG_SECTIONS];
extern int _db_level;
extern void _db_print(const char *,...) PRINTF_FORMAT_ARG1;

#ifdef HAVE_CVT

#define ap_ecvt ecvt
#define ap_fcvt fcvt
#define ap_gcvt gcvt

#else

/*
 * cvt.c - IEEE floating point formatting routines for FreeBSD
 * from GNU libc-4.6.27
 */

/*
 *    ap_ecvt converts to decimal
 *      the number of digits is specified by ndigit
 *      decpt is set to the position of the decimal point
 *      sign is set to 0 for positive, 1 for negative
 */

#define        NDIG    80

static char *
ap_cvt(double arg, int ndigits, int *decpt, int *sign, int eflag)
{
    register int r2;
    double fi, fj;
    register char *p, *p1;
    static char buf[NDIG];

    if (ndigits >= NDIG - 1)
       ndigits = NDIG - 2;
    r2 = 0;
    *sign = 0;
    p = &buf[0];
    if (arg < 0) {
       *sign = 1;
       arg = -arg;
    }
    arg = modf(arg, &fi);
    p1 = &buf[NDIG];
    /*
     * Do integer part
     */
    if (fi != 0) {
       p1 = &buf[NDIG];
       while (fi != 0) {
           fj = modf(fi / 10, &fi);
           *--p1 = (int) ((fj + .03) * 10) + '0';
           r2++;
       }
       while (p1 < &buf[NDIG])
           *p++ = *p1++;
    } else if (arg > 0) {
       while ((fj = arg * 10) < 1) {
           arg = fj;
           r2--;
       }
    }
    p1 = &buf[ndigits];
    if (eflag == 0)
       p1 += r2;
    *decpt = r2;
    if (p1 < &buf[0]) {
       buf[0] = '\0';
       return (buf);
    }
    while (p <= p1 && p < &buf[NDIG]) {
       arg *= 10;
       arg = modf(arg, &fj);
       *p++ = (int) fj + '0';
    }
    if (p1 >= &buf[NDIG]) {
       buf[NDIG - 1] = '\0';
       return (buf);
    }
    p = p1;
    *p1 += 5;
    while (*p1 > '9') {
       *p1 = '0';
       if (p1 > buf)
           ++ * --p1;
       else {
           *p1 = '1';
           (*decpt)++;
           if (eflag == 0) {
               if (p > buf)
                   *p = '0';
               p++;
           }
       }
    }
    *p = '\0';
    return (buf);
}

static char *
ap_ecvt(double arg, int ndigits, int *decpt, int *sign)
{
    return (ap_cvt(arg, ndigits, decpt, sign, 1));
}

static char *
ap_fcvt(double arg, int ndigits, int *decpt, int *sign)
{
    return (ap_cvt(arg, ndigits, decpt, sign, 0));
}

/*
 * ap_gcvt  - Floating output conversion to
 * minimal length string
 */

static char *
ap_gcvt(double number, int ndigit, char *buf)
{
    int sign, decpt;
    register char *p1, *p2;
    register int i;

    p1 = ap_ecvt(number, ndigit, &decpt, &sign);
    p2 = buf;
    if (sign)
       *p2++ = '-';
    for (i = ndigit - 1; i > 0 && p1[i] == '0'; i--)
       ndigit--;
    if ((decpt >= 0 && decpt - ndigit > 4)
       || (decpt < 0 && decpt < -3)) {         /* use E-style */
       decpt--;
       *p2++ = *p1++;
       *p2++ = '.';
       for (i = 1; i < ndigit; i++)
           *p2++ = *p1++;
       *p2++ = 'e';
       if (decpt < 0) {
           decpt = -decpt;
           *p2++ = '-';
       } else
           *p2++ = '+';
       if (decpt / 100 > 0)
           *p2++ = decpt / 100 + '0';
       if (decpt / 10 > 0)
           *p2++ = (decpt % 100) / 10 + '0';
       *p2++ = decpt % 10 + '0';
    } else {
       if (decpt <= 0) {
           if (*p1 != '0')
               *p2++ = '.';
           while (decpt < 0) {
               decpt++;
               *p2++ = '0';
           }
       }
       for (i = 1; i <= ndigit; i++) {
           *p2++ = *p1++;
           if (i == decpt)
               *p2++ = '.';
       }
       if (ndigit < decpt) {
           while (ndigit++ < decpt)
               *p2++ = '0';
           *p2++ = '.';
       }
    }
    if (p2[-1] == '.')
       p2--;
    *p2 = '\0';
    return (buf);
}

#endif /* HAVE_CVT */

typedef enum {
    NO = 0, YES = 1
} boolean_e;

#define FALSE                  0
#define TRUE                   1
#define NUL                    '\0'
#define INT_NULL               ((int *)0)
#define WIDE_INT               long

typedef WIDE_INT wide_int;
typedef unsigned WIDE_INT u_wide_int;
typedef int bool_int;

#define S_NULL                 "(null)"
#define S_NULL_LEN             6

#define FLOAT_DIGITS           6
#define EXPONENT_LENGTH                10

/*
 * NUM_BUF_SIZE is the size of the buffer used for arithmetic conversions
 *
 * XXX: this is a magic number; do not decrease it
 */
#define NUM_BUF_SIZE           512


/*
 * Descriptor for buffer area
 */
struct buf_area {
    char *buf_end;
    char *nextb;               /* pointer to next byte to read/write   */
};

typedef struct buf_area buffy;

/*
 * The INS_CHAR macro inserts a character in the buffer and writes
 * the buffer back to disk if necessary
 * It uses the char pointers sp and bep:
 *      sp points to the next available character in the buffer
 *      bep points to the end-of-buffer+1
 * While using this macro, note that the nextb pointer is NOT updated.
 *
 * NOTE: Evaluation of the c argument should not have any side-effects
 */
#define INS_CHAR( c, sp, bep, cc )     \
           {                           \
               if ( sp < bep )         \
               {                       \
                   *sp++ = c ;         \
                   cc++ ;              \
               }                       \
           }

#define NUM( c )                       ( c - '0' )

#define STR_TO_DEC( str, num )         \
    num = NUM( *str++ ) ;              \
    while ( xisdigit( *str ) )         \
    {                                  \
       num *= 10 ;                     \
       num += NUM( *str++ ) ;          \
    }

/*
 * This macro does zero padding so that the precision
 * requirement is satisfied. The padding is done by
 * adding '0's to the left of the string that is going
 * to be printed.
 */
#define FIX_PRECISION( adjust, precision, s, s_len )   \
    if ( adjust )                                      \
       while ( s_len < precision )                     \
       {                                               \
           *--s = '0' ;                                \
           s_len++ ;                                   \
       }

/*
 * Macro that does padding. The padding is done by printing
 * the character ch.
 */
#define PAD( width, len, ch )  do              \
       {                                       \
           INS_CHAR( ch, sp, bep, cc ) ;       \
           width-- ;                           \
       }                                       \
       while ( width > len )

/*
 * Prefix the character ch to the string str
 * Increase length
 * Set the has_prefix flag
 */
#define PREFIX( str, length, ch )       *--str = ch ; length++ ; has_prefix = YES


/*
 * Convert num to its decimal format.
 * Return value:
 *   - a pointer to a string containing the number (no sign)
 *   - len contains the length of the string
 *   - is_negative is set to TRUE or FALSE depending on the sign
 *     of the number (always set to FALSE if is_unsigned is TRUE)
 *
 * The caller provides a buffer for the string: that is the buf_end argument
 * which is a pointer to the END of the buffer + 1 (i.e. if the buffer
 * is declared as buf[ 100 ], buf_end should be &buf[ 100 ])
 */
static char *
conv_10(register wide_int num, register bool_int is_unsigned,
    register bool_int * is_negative, char *buf_end, register int *len)
{
    register char *p = buf_end;
    register u_wide_int magnitude;

    if (is_unsigned) {
       magnitude = (u_wide_int) num;
       *is_negative = FALSE;
    } else {
       *is_negative = (num < 0);

       /*
        * On a 2's complement machine, negating the most negative integer
        * results in a number that cannot be represented as a signed integer.
        * Here is what we do to obtain the number's magnitude:
        *      a. add 1 to the number
        *      b. negate it (becomes positive)
        *      c. convert it to unsigned
        *      d. add 1
        */
       if (*is_negative) {
           wide_int t = num + 1;

           magnitude = ((u_wide_int) - t) + 1;
       } else
           magnitude = (u_wide_int) num;
    }

    /*
     * We use a do-while loop so that we write at least 1 digit
     */
    do {
       register u_wide_int new_magnitude = magnitude / 10;

       *--p = (char) (magnitude - new_magnitude * 10 + '0');
       magnitude = new_magnitude;
    }
    while (magnitude);

    *len = buf_end - p;
    return (p);
}



/*
 * Convert a floating point number to a string formats 'f', 'e' or 'E'.
 * The result is placed in buf, and len denotes the length of the string
 * The sign is returned in the is_negative argument (and is not placed
 * in buf).
 */
static char *
conv_fp(register char format, register double num,
    boolean_e add_dp, int precision, bool_int * is_negative, char *buf, int *len)
{
    register char *s = buf;
    register char *p;
    int decimal_point;

    if (format == 'f')
       p = ap_fcvt(num, precision, &decimal_point, is_negative);
    else                       /* either e or E format */
       p = ap_ecvt(num, precision + 1, &decimal_point, is_negative);

    /*
     * Check for Infinity and NaN
     */
    if (xisalpha(*p)) {
       *len = strlen(strcpy(buf, p));
       *is_negative = FALSE;
       return (buf);
    }
    if (format == 'f') {
       if (decimal_point <= 0) {
           *s++ = '0';
           if (precision > 0) {
               *s++ = '.';
               while (decimal_point++ < 0)
                   *s++ = '0';
           } else if (add_dp)
               *s++ = '.';
       } else {
           while (decimal_point-- > 0)
               *s++ = *p++;
           if (precision > 0 || add_dp)
               *s++ = '.';
       }
    } else {
       *s++ = *p++;
       if (precision > 0 || add_dp)
           *s++ = '.';
    }

    /*
     * copy the rest of p, the NUL is NOT copied
     */
    while (*p)
       *s++ = *p++;

    if (format != 'f') {
       char temp[EXPONENT_LENGTH];     /* for exponent conversion */
       int t_len;
       bool_int exponent_is_negative;

       *s++ = format;          /* either e or E */
       decimal_point--;
       if (decimal_point != 0) {
           p = conv_10((wide_int) decimal_point, FALSE, &exponent_is_negative,
               &temp[EXPONENT_LENGTH], &t_len);
           *s++ = exponent_is_negative ? '-' : '+';

           /*
            * Make sure the exponent has at least 2 digits
            */
           if (t_len == 1)
               *s++ = '0';
           while (t_len--)
               *s++ = *p++;
       } else {
           *s++ = '+';
           *s++ = '0';
           *s++ = '0';
       }
    }
    *len = s - buf;
    return (buf);
}


/*
 * Convert num to a base X number where X is a power of 2. nbits determines X.
 * For example, if nbits is 3, we do base 8 conversion
 * Return value:
 *      a pointer to a string containing the number
 *
 * The caller provides a buffer for the string: that is the buf_end argument
 * which is a pointer to the END of the buffer + 1 (i.e. if the buffer
 * is declared as buf[ 100 ], buf_end should be &buf[ 100 ])
 */
static char *
conv_p2(register u_wide_int num, register int nbits,
    char format, char *buf_end, register int *len)
{
    register int mask = (1 << nbits) - 1;
    register char *p = buf_end;
    static char low_digits[] = "0123456789abcdef";
    static char upper_digits[] = "0123456789ABCDEF";
    register char *digits = (format == 'X') ? upper_digits : low_digits;

    do {
       *--p = digits[num & mask];
       num >>= nbits;
    }
    while (num);

    *len = buf_end - p;
    return (p);
}


/*
 * Do format conversion placing the output in buffer
 */
static int
format_converter(register buffy * odp,  char *fmt,  va_list ap)
{
    char *sp;
    char *bep;
    int cc = 0;
    int i;

    char *s = NULL;
    char *q;
    int s_len;

    int min_width = 0;
    int precision = 0;
    enum {
       LEFT, RIGHT
    } adjust;
    char pad_char;
    char prefix_char;

    double fp_num;
    wide_int i_num = (wide_int) 0;
    u_wide_int ui_num;

    char num_buf[NUM_BUF_SIZE];
    char char_buf[2];          /* for printing %% and %<unknown> */
int razIncr=0;
//static int onjopa=0;
    /*
     * Flag variables
     */
    boolean_e is_long;
    boolean_e alternate_form;
    boolean_e print_sign;
    boolean_e print_blank;
    boolean_e adjust_precision;
    boolean_e adjust_width;
    bool_int is_negative;

    sp = odp->nextb;
    bep = odp->buf_end;

if(fmt == NULL)
{
// if(!onjopa)
  { // printf("\aжопа номер 1\n");
    // onjopa  = 1;
     fatal("snprintf.:format_converter: жопа номер 1");
  }
  abort();
}

    while (*fmt) {
       if (*fmt != '%') {
           INS_CHAR(*fmt, sp, bep, cc);
       } else {
           /*
            * Default variable settings
            */
           adjust = RIGHT;
           alternate_form = print_sign = print_blank = NO;
           pad_char = ' ';
           prefix_char = NUL;


           fmt++;
           razIncr++;
if(fmt == NULL)
{
// if(!onjopa)
  { // printf("\aжопа номер 2\n");
    // onjopa = 1;
     fatal("snprintf.:format_converter: жопа номер 2");
  }
   abort();
}
if(razIncr > 10000)
{ //if(!onjopa)
   { // printf("жопа номер 3\n");
     // onjopa = 1;
      fatal("snprintf.:format_converter: жопа номер 3");
   }
   abort();
}

           /*
            * Try to avoid checking for flags, width or precision
            */
           if (xisascii(*fmt) && !xislower(*fmt)) {
               /*
                * Recognize flags: -, #, BLANK, +
                */
               for (;; fmt++) {
                   if (*fmt == '-')
                       adjust = LEFT;
                   else if (*fmt == '+')
                       print_sign = YES;
                   else if (*fmt == '#')
                       alternate_form = YES;
                   else if (*fmt == ' ')
                       print_blank = YES;
                   else if (*fmt == '0')
                       pad_char = '0';
                   else
                       break;
               }

               /*
                * Check if a width was specified
                */
               if (xisdigit(*fmt)) {
                   STR_TO_DEC(fmt, min_width);
                   adjust_width = YES;
               } else if (*fmt == '*') {
                   min_width = va_arg(ap, int);
                   fmt++;
                   adjust_width = YES;
                   if (min_width < 0) {
                       adjust = LEFT;
                       min_width = -min_width;
                   }
               } else
                   adjust_width = NO;

               /*
                * Check if a precision was specified
                *
                * XXX: an unreasonable amount of precision may be specified
                * resulting in overflow of num_buf. Currently we
                * ignore this possibility.
                */
               if (*fmt == '.') {
                   adjust_precision = YES;
                   fmt++;
                   if (xisdigit(*fmt)) {
                       STR_TO_DEC(fmt, precision);
                   } else if (*fmt == '*') {
                       precision = va_arg(ap, int);
                       fmt++;
                       if (precision < 0)
                           precision = 0;
                   } else
                       precision = 0;
               } else
                   adjust_precision = NO;
           } else
               adjust_precision = adjust_width = NO;

           /*
            * Modifier check
            */
           if (*fmt == 'l') {
               is_long = YES;
               fmt++;
           } else
               is_long = NO;

           /*
            * Argument extraction and printing.
            * First we determine the argument type.
            * Then, we convert the argument to a string.
            * On exit from the switch, s points to the string that
            * must be printed, s_len has the length of the string
            * The precision requirements, if any, are reflected in s_len.
            *
            * NOTE: pad_char may be set to '0' because of the 0 flag.
            *   It is reset to ' ' by non-numeric formats
            */
           switch (*fmt) {
           case 'u':
               if (is_long)
                   i_num = va_arg(ap, u_wide_int);
               else
                   i_num = (wide_int) va_arg(ap, unsigned int);
               /*
                * The rest also applies to other integer formats, so fall
                * into that case.
                */
           case 'd':
           case 'i':
               /*
                * Get the arg if we haven't already.
                */
               if ((*fmt) != 'u') {
                   if (is_long)
                       i_num = va_arg(ap, wide_int);
                   else
                       i_num = (wide_int) va_arg(ap, int);
               };
               s = conv_10(i_num, (*fmt) == 'u', &is_negative,
                   &num_buf[NUM_BUF_SIZE], &s_len);
               FIX_PRECISION(adjust_precision, precision, s, s_len);

               if (*fmt != 'u') {
                   if (is_negative)
                       prefix_char = '-';
                   else if (print_sign)
                       prefix_char = '+';
                   else if (print_blank)
                       prefix_char = ' ';
               }
               break;


           case 'o':
               if (is_long)
                   ui_num = va_arg(ap, u_wide_int);
               else
                   ui_num = (u_wide_int) va_arg(ap, unsigned int);
               s = conv_p2(ui_num, 3, *fmt,
                   &num_buf[NUM_BUF_SIZE], &s_len);
               FIX_PRECISION(adjust_precision, precision, s, s_len);
               if (alternate_form && *s != '0') {
                   *--s = '0';
                   s_len++;
               }
               break;


           case 'x':
           case 'X':
               if (is_long)
                   ui_num = (u_wide_int) va_arg(ap, u_wide_int);
               else
                   ui_num = (u_wide_int) va_arg(ap, unsigned int);
               s = conv_p2(ui_num, 4, *fmt,
                   &num_buf[NUM_BUF_SIZE], &s_len);
               FIX_PRECISION(adjust_precision, precision, s, s_len);
               if (alternate_form && i_num != 0) {
                   *--s = *fmt;        /* 'x' or 'X' */
                   *--s = '0';
                   s_len += 2;
               }
               break;


           case 's':
               s = va_arg(ap, char *);
               if (s != NULL) {
/* --- */
/* #Default:
   # request_header_max_size 10 KB
*/

/* -- */
//if(!onjopa)
      {    int ii, len;
           for(ii=0;ii<MAX_S_STRING_LENGTH;ii++)
           {  if(s[ii] == 0)
                break;
           }
           if(ii >= MAX_S_STRING_LENGTH) /* XXX! but what to do ? EK */
           { 
//              s_len = MAX_S_STRING_LENGTH-1;
//              s[s_len] = 0;
//              printf("\aжопа номер 5\n");
//              onjopa = 1;
//              debug(1, 0) ("snprintf.:format_converter:WARNING: j#5, first %i bytes of buffer:\n>%s<\n",s_len,s);
////          debug(1, 0) ("snprintf.:format_converter::WARNING: жопа номер 5. не выполненно условие %p <= %p < %p",odp->nextb,s,odp->buf_end);
          fatal("snprintf.:format_converter: жопа номер 5");
           } else {
               s_len = ii;
           }
       }
/* -- */
//                   s_len = strlen(s);
                   if (adjust_precision && precision < s_len)
                       s_len = precision;
               } else {
                   s = S_NULL;
                   s_len = S_NULL_LEN;
               }
               pad_char = ' ';
               break;


           case 'f':
           case 'e':
           case 'E':
               fp_num = va_arg(ap, double);

               s = conv_fp(*fmt, fp_num, alternate_form,
                   (adjust_precision == NO) ? FLOAT_DIGITS : precision,
                   &is_negative, &num_buf[1], &s_len);
               if (is_negative)
                   prefix_char = '-';
               else if (print_sign)
                   prefix_char = '+';
               else if (print_blank)
                   prefix_char = ' ';
               break;


           case 'g':
           case 'G':
               if (adjust_precision == NO)
                   precision = FLOAT_DIGITS;
               else if (precision == 0)
                   precision = 1;
               /* We use &num_buf[ 1 ], so that we have room for the sign */
               s = ap_gcvt(va_arg(ap, double), precision, &num_buf[1]);
               if (*s == '-')
                   prefix_char = *s++;
               else if (print_sign)
                   prefix_char = '+';
               else if (print_blank)
                   prefix_char = ' ';
if(s == NULL)
{
//  if(!onjopa)
  { // printf("жопа номер 6\n");
    // onjopa = 1;
     fatal("snprintf.:format_converter: жопа номер 6");
  }
   abort();
}
/* -- */
{  int ii;
   for(ii=0;ii<1024;ii++)
   {  if(s[ii] == 0)
                break;
   }
if(ii >= 1000)
{
//   if(!onjopa)
   {  //  printf("жопа номер 7\n");
      //  onjopa = 1;
        fatal("snprintf.:format_converter: жопа номер 7");
   }
   abort();
}

}
/* -- */

               s_len = strlen(s);

               if (alternate_form && (q = strchr(s, '.')) == NULL)
                   s[s_len++] = '.';
               if (*fmt == 'G' && (q = strchr(s, 'e')) != NULL)
                   *q = 'E';
               break;


           case 'c':
               char_buf[0] = (char) (va_arg(ap, int));
               s = &char_buf[0];
               s_len = 1;
               pad_char = ' ';
               break;


           case '%':
               char_buf[0] = '%';
               s = &char_buf[0];
               s_len = 1;
               pad_char = ' ';
               break;


           case 'n':
               *(va_arg(ap, int *)) = cc;
               break;

               /*
                * Always extract the argument as a "char *" pointer. We
                * should be using "void *" but there are still machines
                * that don't understand it.
                * If the pointer size is equal to the size of an unsigned
                * integer we convert the pointer to a hex number, otherwise
                * we print "%p" to indicate that we don't handle "%p".
                */
           case 'p':
               ui_num = (u_wide_int) va_arg(ap, char *);

               if (sizeof(char *) <= sizeof(u_wide_int))
                        s = conv_p2(ui_num, 4, 'x',
                       &num_buf[NUM_BUF_SIZE], &s_len);
               else {
                   s = "%p";
                   s_len = 2;
               }
               pad_char = ' ';
               break;


           case NUL:
               /*
                * The last character of the format string was %.
                * We ignore it.
                */
               continue;


               /*
                * The default case is for unrecognized %'s.
                * We print %<char> to help the user identify what
                * option is not understood.
                * This is also useful in case the user wants to pass
                * the output of format_converter to another function
                * that understands some other %<char> (like syslog).
                * Note that we can't point s inside fmt because the
                * unknown <char> could be preceded by width etc.
                */
           default:
               char_buf[0] = '%';
               char_buf[1] = *fmt;
               s = char_buf;
               s_len = 2;
               pad_char = ' ';
               break;
           }

           if (prefix_char != NUL) {
               *--s = prefix_char;
               s_len++;
           }
           if (adjust_width && adjust == RIGHT && min_width > s_len) {
               if (pad_char == '0' && prefix_char != NUL) {
                   INS_CHAR(*s, sp, bep, cc)
                       s++;
                   s_len--;
                   min_width--;
               }
               PAD(min_width, s_len, pad_char);
           }
           /*
            * Print the string s.
            */
           for (i = s_len; i != 0; i--) {
               INS_CHAR(*s, sp, bep, cc);
               s++;
           }

           if (adjust_width && adjust == LEFT && min_width > s_len)
               PAD(min_width, s_len, pad_char);
       }
       fmt++;
    }
    odp->nextb = sp;
    return (cc);
}


/*
 * This is the general purpose conversion function.
 * Must be called with len >= 0, but we cannot assert() that
 * because size_t is unsigned on some platforms
 */
static void
strx_printv(int *ccp, char *buf, size_t len, const char *format,
    va_list ap)
{
    buffy od;
    int cc;

#if OLD_CODE
    /*
     * First initialize the descriptor
     * Notice that if no length is given, we initialize buf_end to the
     * highest possible address.
     */
    od.buf_end = len ? &buf[len] : (char *) ~0;
#else
    od.buf_end = &buf[len];
#endif
    od.nextb = buf;

    /*
     * Do the conversion
     */
    cc = format_converter(&od, (char *)format, ap);
    if (len == 0 || od.nextb <= od.buf_end)
       *(od.nextb) = '\0';
    if (ccp)
       *ccp = cc;
}
#endif

#if !HAVE_SNPRINTF
/*
 * if len == 0, silently return
 */
int
snprintf(char *buf, size_t len, const char *format,...)
{
    int cc = 0;
    va_list ap;
    va_start(ap, format);
    if (len > 0)
       strx_printv(&cc, buf, (len - 1), format, ap);
    va_end(ap);
    return (cc);
}
#endif

#if !HAVE_VSNPRINTF
/*
 * if len == 0, silently return
 */
int
vsnprintf(char *buf, size_t len, const char *format, va_list ap)
{
    int cc = 0;
    if (len > 0)
       strx_printv(&cc, buf, (len - 1), format, ap);
    return (cc);
}
#endif
