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compat.c

/*
 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
 * 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. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED ``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 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.
 *
 * $Id: compat.c,v 1.9 2010/02/25 15:31:40 ragge Exp $
 */

/*-
 * Copyright (c) 1997, 2002 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Klaus Klein and Jason R. Thorpe.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``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 FOUNDATION 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.
 *
 *    $NetBSD: basename.c,v 1.9 2009/11/24 13:34:20 tnozaki Exp $
 */

/*
 * Copyright (c) 1987, 1993
 *    The Regents of the University of California.  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. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS 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.
 *
 *    $NetBSD: gettemp.c,v 1.13 2003/12/05 00:57:36 uebayasi Exp $
 */

#include <string.h>
#include <fcntl.h>

#include "config.h"
#define MKEXT     /* XXX */
#include "manifest.h"

#ifndef HAVE_STRLCAT
/*
 * Appends src to string dst of size siz (unlike strncat, siz is the
 * full size of dst, not space left).  At most siz-1 characters
 * will be copied.  Always NUL terminates (unless siz <= strlen(dst)).
 * Returns strlen(initial dst) + strlen(src); if retval >= siz,
 * truncation occurred.
 */
size_t
strlcat(char *dst, const char *src, size_t siz)
{
      char *d = dst;
      const char *s = src;
      size_t n = siz;
      size_t dlen;

      /* Find the end of dst and adjust bytes left but don't go past end */
      while (n-- != 0 && *d != '\0')
            d++;
      dlen = d - dst;
      n = siz - dlen;

      if (n == 0)
            return(dlen + strlen(s));
      while (*s != '\0') {
            if (n != 1) {
                  *d++ = *s;
                  n--;
            }
            s++;
      }
      *d = '\0';

      return(dlen + (s - src));     /* count does not include NUL */
}
#endif


#ifndef HAVE_STRLCPY
/*
 * Copy src to string dst of size siz.  At most siz-1 characters
 * will be copied.  Always NUL terminates (unless siz == 0).
 * Returns strlen(src); if retval >= siz, truncation occurred.
 */
size_t
strlcpy(char *dst, const char *src, size_t siz)
{
      char *d = dst;
      const char *s = src;
      size_t n = siz;

      /* Copy as many bytes as will fit */
      if (n != 0 && --n != 0) {
            do {
                  if ((*d++ = *s++) == 0)
                        break;
            } while (--n != 0);
      }

      /* Not enough room in dst, add NUL and traverse rest of src */
      if (n == 0) {
            if (siz != 0)
                  *d = '\0';  /* NUL-terminate dst */
            while (*s++)
                  ;
      }

      return(s - src - 1);    /* count does not include NUL */
}
#endif

#ifndef HAVE_GETOPT
char *optarg;
int optind = 1;
int
getopt(int argc, char **argv, char *args)
{
        int n;
      int nlen = strlen(args);
        char cmd;
        char rv;

        if (argv[optind] && *argv[optind] == '-') {
                cmd = *(argv[optind] + 1);

                for (n = 0; n < nlen; n++) {
                        if (args[n] == ':')
                        continue;
                        if (args[n] == cmd) {
                                rv = *(argv[optind] + 1);
                                if (args[n+1] == ':') {
                              if (*(argv[optind] + 2) != '\0') {
                                              optarg = argv[optind] + 2;
                                    optind += 1;
                              } else {
                                              optarg = argv[optind + 1];
                                          optind += 2;
                              }
                                        if (!optarg)
                                     optarg="";
                                        return rv;
                                } else {
                                        optarg = NULL;
                                        optind += 1;
                                        return rv;
                                }
                        }
                }       
        }

        return -1;
}
#endif

#ifdef WIN32
#define ISPATHSEPARATOR(x) ((x == '/') || (x == '\\'))
#else
#define ISPATHSEPARATOR(x) (x == '/')
#endif

#ifndef HAVE_BASENAME
#ifndef PATH_MAX
#define PATH_MAX 5000
#endif

char *
basename(char *path)
{
      static char result[PATH_MAX];
      char *p, *lastp;
      size_t len;

      /*
       * If `path' is a null pointer or points to an empty string,
       * return a pointer to the string ".".
       */
      if ((path == NULL) || (*path == '\0')) {
            result[0] = '.';
            result[1] = '\0';

            return (result);
      }

      /* Strip trailing slashes, if any. */
      lastp = path + strlen(path) - 1;
      while (lastp != path && ISPATHSEPARATOR(*lastp))
            lastp--;

      /* Now find the beginning of this (final) component. */
      p = lastp;
      while (p != path && !ISPATHSEPARATOR(*(p - 1)))
            p--;

      /* ...and copy the result into the result buffer. */
      len = (lastp - p) + 1 /* last char */;
      if (len > (PATH_MAX - 1))
            len = PATH_MAX - 1;

      memcpy(result, p, len);
      result[len] = '\0';

      return (result);
}
#endif

#if !defined(HAVE_MKSTEMP) && !defined(WIN32)
int
mkstemp(char *path)
{
      char *start, *trv;
      unsigned int pid;

      /* To guarantee multiple calls generate unique names even if
         the file is not created. 676 different possibilities with 7
         or more X's, 26 with 6 or less. */
      static char xtra[2] = "aa";
      int xcnt = 0;

      pid = getpid();

      /* Move to end of path and count trailing X's. */
      for (trv = path; *trv; ++trv)
            if (*trv == 'X')
                  xcnt++;
            else
                  xcnt = 0;

      /* Use at least one from xtra.  Use 2 if more than 6 X's. */
      if (*(trv - 1) == 'X')
            *--trv = xtra[0];
      if (xcnt > 6 && *(trv - 1) == 'X')
            *--trv = xtra[1];

      /* Set remaining X's to pid digits with 0's to the left. */
      while (*--trv == 'X') {
            *trv = (pid % 10) + '0';
            pid /= 10;
      }

      /* update xtra for next call. */
      if (xtra[0] != 'z')
            xtra[0]++;
      else {
            xtra[0] = 'a';
            if (xtra[1] != 'z')
                  xtra[1]++;
            else
                  xtra[1] = 'a';
      }

      return open(path, O_CREAT | O_EXCL | O_RDWR, 0600);
}
#endif

#ifndef HAVE_FFS
int
ffs(int x) 
{ 
      int r = 1;
      if (!x) return 0; 
      if (!(x & 0xffff)) { x >>= 16; r += 16; }
      if (!(x &   0xff)) { x >>= 8;  r += 8;  }
      if (!(x &    0xf)) { x >>= 4;  r += 4;  }
      if (!(x &      3)) { x >>= 2;  r += 2;  }
      if (!(x &      1)) { x >>= 1;  r += 1;  }

      return r; 
}
#endif

/*
 * 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
 */

#if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF)

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

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 DP_C_LONG_LONG 4

#define char_to_int(p) (p - '0')
#define abs_val(p) (p < 0 ? -p : p)


static void 
dopr(char *buffer, size_t maxlen, const char *format, va_list args)
{
      char *strvalue, ch;
      long value;
      long double fvalue;
      int min = 0, max = -1, state = DP_S_DEFAULT, flags = 0, cflags = 0;
      size_t currlen = 0;
  
      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:
                  switch (ch) {
                  case 'h':
                        cflags = DP_C_SHORT;
                        ch = *format++;
                        break;
                  case 'l':
                        cflags = DP_C_LONG;
                        ch = *format++;
                        if (ch == 'l') {
                              cflags = DP_C_LONG_LONG;
                              ch = *format++;
                        }
                        break;
                  case 'q':
                        cflags = DP_C_LONG_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, int);
                        else if (cflags == DP_C_LONG)
                              value = va_arg(args, long int);
                        else if (cflags == DP_C_LONG_LONG)
                              value = va_arg (args, long long);
                        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 int);
                        else if (cflags == DP_C_LONG)
                              value = va_arg(args, unsigned long int);
                        else if (cflags == DP_C_LONG_LONG)
                              value = va_arg(args, unsigned long long);
                        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 int);
                        else if (cflags == DP_C_LONG)
                              value = va_arg(args, unsigned long int);
                        else if (cflags == DP_C_LONG_LONG)
                              value = va_arg(args, unsigned long long);
                        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 int);
                        else if (cflags == DP_C_LONG)
                              value = va_arg(args, unsigned long int);
                        else if (cflags == DP_C_LONG_LONG)
                              value = va_arg(args, unsigned long long);
                        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 if (cflags == DP_C_LONG_LONG) {
                              long long *num;
                              num = va_arg(args, long long *);
                              *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 cnt = 0, padlen, strln;     /* amount to pad */
  
      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)
{
      unsigned long uvalue;
      char convert[20];
      int signvalue = 0, place = 0, caps = 0;
      int spadlen = 0; /* amount to space pad */
      int zpadlen = 0; /* amount to zero pad */

#define PADMAX(x,y)     ((x) > (y) ? (x) : (y))

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

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

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

static long 
round(long double value)
{
      long intpart = 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)
{
      char iconvert[20], fconvert[20];
      int signvalue = 0, iplace = 0, fplace = 0;
      int padlen = 0; /* amount to pad */
      int zpadlen = 0, caps = 0;
      long intpart, fracpart;
      long double ufvalue;
  
      /* 
       * 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 = ' ';

      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);
      }

      /* 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;
}
#endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */

#ifndef HAVE_VSNPRINTF
int 
vsnprintf(char *str, size_t count, const char *fmt, va_list args)
{
      str[0] = 0;
      dopr(str, count, fmt, args);

      return(strlen(str));
}
#endif /* !HAVE_VSNPRINTF */

#ifndef HAVE_SNPRINTF
int 
snprintf(char *str,size_t count,const char *fmt,...)
{
      va_list ap;

      va_start(ap, fmt);
      (void) vsnprintf(str, count, fmt, ap);
      va_end(ap);

      return(strlen(str));
}

#endif /* !HAVE_SNPRINTF */

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