/*
 * 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
 */

/**************************************************************
 * Original:
 * Patrick Powell Tue Apr 11 09:48:21 PDT 1995
 * A bombproof version of doprnt (dopr) included.
 * Sigh.  This sort of thing is always nasty do deal with.  Note that
 * the version here does not include floating point...
 *
 * snprintf() is used instead of sprintf() as it does limit checks
 * for string length.  This covers a nasty loophole.
 *
 * The other functions are there to prevent NULL pointers from
 * causing nast effects.
 *
 * More Recently:
 *  Brandon Long <blong@fiction.net> 9/15/96 for mutt 0.43
 *  This was ugly.  It is still ugly.  I opted out of floating point
 *  numbers, but the formatter understands just about everything
 *  from the normal C string format, at least as far as I can tell from
 *  the Solaris 2.5 printf(3S) man page.
 *
 *  Brandon Long <blong@fiction.net> 10/22/97 for mutt 0.87.1
 *    Ok, added some minimal floating point support, which means this
 *    probably requires libm on most operating systems.  Don't yet
 *    support the exponent (e,E) and sigfig (g,G).  Also, fmtint()
 *    was pretty badly broken, it just wasn't being exercised in ways
 *    which showed it, so that's been fixed.  Also, formatted the code
 *    to mutt conventions, and removed dead code left over from the
 *    original.  Also, there is now a builtin-test, just compile with:
 *           gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm
 *    and run snprintf for results.
 *
 *  Thomas Roessler <roessler@guug.de> 01/27/98 for mutt 0.89i
 *    The PGP code was using unsigned hexadecimal formats.
 *    Unfortunately, unsigned formats simply didn't work.
 *
 *  Michael Elkins <me@cs.hmc.edu> 03/05/98 for mutt 0.90.8
 *    The original code assumed that both snprintf() and vsnprintf() were
 *    missing.  Some systems only have snprintf() but not vsnprintf(), so
 *    the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF.
 *
 *  Andrew Tridgell (tridge@samba.org) Oct 1998
 *    fixed handling of %.0f
 *    added test for HAVE_LONG_DOUBLE
 *
 * tridge@samba.org, idra@samba.org, April 2001
 *    got rid of fcvt code (twas buggy and made testing harder)
 *    added C99 semantics
 *
 * date: 2002/12/19 19:56:31;  author: herb;  state: Exp;  lines: +2 -0
 * actually print args for %g and %e
 *
 * date: 2002/06/03 13:37:52;  author: jmcd;  state: Exp;  lines: +8 -0
 * Since includes.h isn't included here, VA_COPY has to be defined here.  I don't
 * see any include file that is guaranteed to be here, so I'm defining it
 * locally.  Fixes AIX and Solaris builds.
 *
 * date: 2002/06/03 03:07:24;  author: tridge;  state: Exp;  lines: +5 -13
 * put the ifdef for HAVE_VA_COPY in one place rather than in lots of
 * functions
 *
 * date: 2002/05/17 14:51:22;  author: jmcd;  state: Exp;  lines: +21 -4
 * Fix usage of va_list passed as an arg.  Use __va_copy before using it
 * when it exists.
 *
 * date: 2002/04/16 22:38:04;  author: idra;  state: Exp;  lines: +20 -14
 * Fix incorrect zpadlen handling in fmtfp.
 * Thanks to Ollie Oldham <ollie.oldham@metro-optix.com> for spotting it.
 * few mods to make it easier to compile the tests.
 * added the "Ollie" test to the floating point ones.
 *
 * Martin Pool (mbp@samba.org) April 2003
 *    Remove NO_CONFIG_H so that the test case can be built within a source
 *    tree with less trouble.
 *    Remove unnecessary SAFE_FREE() definition.
 *
 * Martin Pool (mbp@samba.org) May 2003
 *    Put in a prototype for dummy_snprintf() to quiet compiler warnings.
 *
 *    Move #endif to make sure VA_COPY, LDOUBLE, etc are defined even
 *    if the C library has some snprintf functions already.
 *
 * Damien Miller (djm@mindrot.org) Jan 2007
 *    Fix integer overflows in return value.
 *    Make formatting quite a bit faster by inlining dopr_outch()
 *
 **************************************************************/

#include "includes.h"

#if defined(BROKEN_SNPRINTF)            /* For those with broken snprintf() */
# undef HAVE_SNPRINTF
# undef HAVE_VSNPRINTF
#endif

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

#include <ctype.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <errno.h>

#ifdef HAVE_LONG_DOUBLE
# define LDOUBLE long double
#else
# define LDOUBLE double
#endif

#ifdef HAVE_LONG_LONG
# define LLONG long long
#else
# define LLONG long
#endif

/*
 * 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_LLONG   4
#define DP_C_SIZE    5
#define DP_C_INTMAX  6

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

#define DOPR_OUTCH(buf, pos, buflen, thechar) \
        do { \
                if (pos + 1 >= INT_MAX) { \
                        errno = ERANGE; \
                        return -1; \
                } \
                if (pos < buflen) \
                        buf[pos] = thechar; \
                (pos)++; \
        } while (0)

static int dopr(char *buffer, size_t maxlen, const char *format,
    va_list args_in);
static int fmtstr(char *buffer, size_t *currlen, size_t maxlen,
    char *value, int flags, int min, int max);
static int fmtint(char *buffer, size_t *currlen, size_t maxlen,
    intmax_t value, int base, int min, int max, int flags);
static int fmtfp(char *buffer, size_t *currlen, size_t maxlen,
    LDOUBLE fvalue, int min, int max, int flags);

static int
dopr(char *buffer, size_t maxlen, const char *format, va_list args_in)
{
        char ch;
        intmax_t value;
        LDOUBLE fvalue;
        char *strvalue;
        int min;
        int max;
        int state;
        int flags;
        int cflags;
        size_t currlen;
        va_list args;

        VA_COPY(args, args_in);

        state = DP_S_DEFAULT;
        currlen = flags = cflags = min = 0;
        max = -1;
        ch = *format++;

        while (state != DP_S_DONE) {
                if (ch == '\0')
                        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 'j':
                                cflags = DP_C_INTMAX;
                                ch = *format++;
                                break;
                        case 'l':
                                cflags = DP_C_LONG;
                                ch = *format++;
                                if (ch == 'l') {        /* It's a long long */
                                        cflags = DP_C_LLONG;
                                        ch = *format++;
                                }
                                break;
                        case 'L':
                                cflags = DP_C_LDOUBLE;
                                ch = *format++;
                                break;
                        case 'z':
                                cflags = DP_C_SIZE;
                                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_LLONG)
                                        value = va_arg (args, LLONG);
                                else if (cflags == DP_C_SIZE)
                                        value = va_arg (args, ssize_t);
                                else if (cflags == DP_C_INTMAX)
                                        value = va_arg (args, intmax_t);
                                else
                                        value = va_arg (args, int);
                                if (fmtint(buffer, &currlen, maxlen,
                                    value, 10, min, max, flags) == -1)
                                        goto fail;
                                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 = (long)va_arg (args, unsigned long int);
                                else if (cflags == DP_C_LLONG)
                                        value = (long)va_arg (args, unsigned LLONG);
                                else if (cflags == DP_C_SIZE)
                                        value = va_arg (args, size_t);
#ifdef notyet
                                else if (cflags == DP_C_INTMAX)
                                        value = va_arg (args, uintmax_t);
#endif
                                else
                                        value = (long)va_arg (args, unsigned int);
                                if (fmtint(buffer, &currlen, maxlen, value,
                                    8, min, max, flags) == -1)
                                        goto fail;
                                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 = (long)va_arg (args, unsigned long int);
                                else if (cflags == DP_C_LLONG)
                                        value = (LLONG)va_arg (args, unsigned LLONG);
                                else if (cflags == DP_C_SIZE)
                                        value = va_arg (args, size_t);
#ifdef notyet
                                else if (cflags == DP_C_INTMAX)
                                        value = va_arg (args, uintmax_t);
#endif
                                else
                                        value = (long)va_arg (args, unsigned int);
                                if (fmtint(buffer, &currlen, maxlen, value,
                                    10, min, max, flags) == -1)
                                        goto fail;
                                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 = (long)va_arg (args, unsigned long int);
                                else if (cflags == DP_C_LLONG)
                                        value = (LLONG)va_arg (args, unsigned LLONG);
                                else if (cflags == DP_C_SIZE)
                                        value = va_arg (args, size_t);
#ifdef notyet
                                else if (cflags == DP_C_INTMAX)
                                        value = va_arg (args, uintmax_t);
#endif
                                else
                                        value = (long)va_arg (args, unsigned int);
                                if (fmtint(buffer, &currlen, maxlen, value,
                                    16, min, max, flags) == -1)
                                        goto fail;
                                break;
                        case 'f':
                                if (cflags == DP_C_LDOUBLE)
                                        fvalue = va_arg (args, LDOUBLE);
                                else
                                        fvalue = va_arg (args, double);
                                if (fmtfp(buffer, &currlen, maxlen, fvalue,
                                    min, max, flags) == -1)
                                        goto fail;
                                break;
                        case 'E':
                                flags |= DP_F_UP;
                        case 'e':
                                if (cflags == DP_C_LDOUBLE)
                                        fvalue = va_arg (args, LDOUBLE);
                                else
                                        fvalue = va_arg (args, double);
                                if (fmtfp(buffer, &currlen, maxlen, fvalue,
                                    min, max, flags) == -1)
                                        goto fail;
                                break;
                        case 'G':
                                flags |= DP_F_UP;
                        case 'g':
                                if (cflags == DP_C_LDOUBLE)
                                        fvalue = va_arg (args, LDOUBLE);
                                else
                                        fvalue = va_arg (args, double);
                                if (fmtfp(buffer, &currlen, maxlen, fvalue,
                                    min, max, flags) == -1)
                                        goto fail;
                                break;
                        case 'c':
                                DOPR_OUTCH(buffer, currlen, maxlen,
                                    va_arg (args, int));
                                break;
                        case 's':
                                strvalue = va_arg (args, char *);
                                if (!strvalue) strvalue = "(NULL)";
                                if (max == -1) {
                                        max = strlen(strvalue);
                                }
                                if (min > 0 && max >= 0 && min > max) max = min;
                                if (fmtstr(buffer, &currlen, maxlen,
                                    strvalue, flags, min, max) == -1)
                                        goto fail;
                                break;
                        case 'p':
                                strvalue = va_arg (args, void *);
                                if (fmtint(buffer, &currlen, maxlen,
                                    (long) strvalue, 16, min, max, flags) == -1)
                                        goto fail;
                                break;
#if we_dont_want_this_in_openssh
                        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 = (long int)currlen;
                                } else if (cflags == DP_C_LLONG) {
                                        LLONG *num;
                                        num = va_arg (args, LLONG *);
                                        *num = (LLONG)currlen;
                                } else if (cflags == DP_C_SIZE) {
                                        ssize_t *num;
                                        num = va_arg (args, ssize_t *);
                                        *num = (ssize_t)currlen;
                                } else if (cflags == DP_C_INTMAX) {
                                        intmax_t *num;
                                        num = va_arg (args, intmax_t *);
                                        *num = (intmax_t)currlen;
                                } else {
                                        int *num;
                                        num = va_arg (args, int *);
                                        *num = currlen;
                                }
                                break;
#endif
                        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 (maxlen != 0) {
                if (currlen < maxlen - 1)
                        buffer[currlen] = '\0';
                else if (maxlen > 0)
                        buffer[maxlen - 1] = '\0';
        }
        va_end(args);
        return currlen < INT_MAX ? (int)currlen : -1;
 fail:
        va_end(args);
        return -1;
}

static int
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;

#ifdef DEBUG_SNPRINTF
        printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value);
#endif
        if (value == 0) {
                value = "<NULL>";
        }

        for (strln = 0; strln < max && 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);
                value++;
                ++cnt;
        }
        while ((padlen < 0) && (cnt < max)) {
                DOPR_OUTCH(buffer, *currlen, maxlen, ' ');
                ++padlen;
                ++cnt;
        }
        return 0;
}

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

static int
fmtint(char *buffer, size_t *currlen, size_t maxlen,
    intmax_t value, int base, int min, int max, int flags)
{
        int signvalue = 0;
        unsigned LLONG 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
        printf("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) {
                --place;
                DOPR_OUTCH(buffer, *currlen, maxlen, convert[place]);
        }

        /* Left Justified spaces */
        while (spadlen < 0) {
                DOPR_OUTCH(buffer, *currlen, maxlen, ' ');
                ++spadlen;
        }
        return 0;
}

static LDOUBLE abs_val(LDOUBLE value)
{
        LDOUBLE result = value;

        if (value < 0)
                result = -value;

        return result;
}

static LDOUBLE POW10(int val)
{
        LDOUBLE result = 1;

        while (val) {
                result *= 10;
                val--;
        }

        return result;
}

static LLONG ROUND(LDOUBLE value)
{
        LLONG intpart;

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

        return intpart;
}

/* a replacement for modf that doesn't need the math library. Should
   be portable, but slow */
static double my_modf(double x0, double *iptr)
{
        int i;
        long l;
        double x = x0;
        double f = 1.0;

        for (i=0;i<100;i++) {
                l = (long)x;
                if (l <= (x+1) && l >= (x-1)) break;
                x *= 0.1;
                f *= 10.0;
        }

        if (i == 100) {
                /*
                 * yikes! the number is beyond what we can handle.
                 * What do we do?
                 */
                (*iptr) = 0;
                return 0;
        }

        if (i != 0) {
                double i2;
                double ret;

                ret = my_modf(x0-l*f, &i2);
                (*iptr) = l*f + i2;
                return ret;
        }

        (*iptr) = l;
        return x - (*iptr);
}


static int
fmtfp (char *buffer, size_t *currlen, size_t maxlen,
    LDOUBLE fvalue, int min, int max, int flags)
{
        int signvalue = 0;
        double ufvalue;
        char iconvert[311];
        char fconvert[311];
        int iplace = 0;
        int fplace = 0;
        int padlen = 0; /* amount to pad */
        int zpadlen = 0;
#if 0
        int caps = 0;
#endif
        int idx;
        double intpart;
        double fracpart;
        double temp;

        /*
         * 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

#if 0
         if (max == 0) ufvalue += 0.5; /* if max = 0 we must round */
#endif

        /*
         * Sorry, we only support 16 digits past the decimal because of our
         * conversion method
         */
        if (max > 16)
                max = 16;

        /* We "cheat" by converting the fractional part to integer by
         * multiplying by a factor of 10
         */

        temp = ufvalue;
        my_modf(temp, &intpart);

        fracpart = ROUND((POW10(max)) * (ufvalue - intpart));

        if (fracpart >= POW10(max)) {
                intpart++;
                fracpart -= POW10(max);
        }

        /* Convert integer part */
        do {
                temp = intpart*0.1;
                my_modf(temp, &intpart);
                idx = (int) ((temp -intpart +0.05)* 10.0);
                /* idx = (int) (((double)(temp*0.1) -intpart +0.05) *10.0); */
                /* printf ("%llf, %f, %x\n", temp, intpart, idx); */
                iconvert[iplace++] = "0123456789"[idx];
        } while (intpart && (iplace < 311));
        if (iplace == 311) iplace--;
        iconvert[iplace] = 0;

        /* Convert fractional part */
        if (fracpart)
        {
                do {
                        temp = fracpart*0.1;
                        my_modf(temp, &fracpart);
                        idx = (int) ((temp -fracpart +0.05)* 10.0);
                        /* idx = (int) ((((temp/10) -fracpart) +0.05) *10); */
                        /* printf ("%lf, %lf, %ld\n", temp, fracpart, idx ); */
                        fconvert[fplace++] = "0123456789"[idx];
                } while(fracpart && (fplace < 311));
                if (fplace == 311) 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) {
                --iplace;
                DOPR_OUTCH(buffer, *currlen, maxlen, iconvert[iplace]);
        }

#ifdef DEBUG_SNPRINTF
        printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen);
#endif

        /*
         * Decimal point.  This should probably use locale to find the correct
         * char to print out.
         */
        if (max > 0) {
                DOPR_OUTCH(buffer, *currlen, maxlen, '.');

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

                while (fplace > 0) {
                        --fplace;
                        DOPR_OUTCH(buffer, *currlen, maxlen, fconvert[fplace]);
                }
        }

        while (padlen < 0) {
                DOPR_OUTCH(buffer, *currlen, maxlen, ' ');
                ++padlen;
        }
        return 0;
}
#endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */

#if !defined(HAVE_VSNPRINTF)
int
vsnprintf (char *str, size_t count, const char *fmt, va_list args)
{
        return dopr(str, count, fmt, args);
}
#endif

#if !defined(HAVE_SNPRINTF)
int
snprintf(char *str, size_t count, SNPRINTF_CONST char *fmt, ...)
{
        size_t ret;
        va_list ap;

        va_start(ap, fmt);
        ret = vsnprintf(str, count, fmt, ap);
        va_end(ap);
        return ret;
}
#endif