- neue Library "ngportab" begonnen: diese bildet Funktionen nach, die auf
authorAlexander Barton <alex@barton.de>
Sun, 19 May 2002 01:17:40 +0000 (01:17 +0000)
committerAlexander Barton <alex@barton.de>
Sun, 19 May 2002 01:17:40 +0000 (01:17 +0000)
  dem Ziel-System nicht vorhanden sind -- wie z.B. vsnprintf().

src/portab/Makefile.am
src/portab/vsnprintf.c [new file with mode: 0644]

index a6e8889245903c2f2cda42526c901030dea606b5..d31cc171ff327811960e9b1e4f319c646e24db92 100644 (file)
@@ -9,9 +9,13 @@
 # Naehere Informationen entnehmen Sie bitter der Datei COPYING. Eine Liste
 # der an ngIRCd beteiligten Autoren finden Sie in der Datei AUTHORS.
 #
-# $Id: Makefile.am,v 1.2 2002/03/15 15:41:55 alex Exp $
+# $Id: Makefile.am,v 1.3 2002/05/19 01:17:40 alex Exp $
 #
 
+noinst_LIBRARIES = libngportab.a
+
+libngportab_a_SOURCES = vsnprintf.c
+
 check_PROGRAMS = portabtest
 
 portabtest_SOURCES = portabtest.c
diff --git a/src/portab/vsnprintf.c b/src/portab/vsnprintf.c
new file mode 100644 (file)
index 0000000..8620164
--- /dev/null
@@ -0,0 +1,952 @@
+/*
+ * ngIRCd -- The Next Generation IRC Daemon
+ * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
+ *
+ * Dieses Programm ist freie Software. Sie koennen es unter den Bedingungen
+ * der GNU General Public License (GPL), wie von der Free Software Foundation
+ * herausgegeben, weitergeben und/oder modifizieren, entweder unter Version 2
+ * der Lizenz oder (wenn Sie es wuenschen) jeder spaeteren Version.
+ * Naehere Informationen entnehmen Sie bitter der Datei COPYING. Eine Liste
+ * der an ngIRCd beteiligten Autoren finden Sie in der Datei AUTHORS.
+ *
+ * $Id: vsnprintf.c,v 1.1 2002/05/19 01:17:40 alex Exp $
+ *
+ * vsnprintf.c: vsnprintf()-Ersatz
+ */
+
+
+#include "portab.h"
+#include "imp.h"
+
+#include "exp.h"
+
+
+/*
+ * snprintf.c: 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, formated 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
+ */
+
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
+#ifdef HAVE_CTYPE_H
+#include <ctype.h>
+#endif
+#include <sys/types.h>
+#include <stdarg.h>
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+#if defined(HAVE_SNPRINTF) && defined(HAVE_VSNPRINTF) && defined(HAVE_C99_VSNPRINTF)
+/* only include stdio.h if we are not re-defining snprintf or vsnprintf */
+#include <stdio.h>
+ /* make the compiler happy with an empty file */
+ void dummy_snprintf(void) {} 
+#else
+
+#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
+
+static size_t 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,
+                  LDOUBLE 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_LLONG   4
+
+#define char_to_int(p) ((p)- '0')
+#ifndef MAX
+#define MAX(p,q) (((p) >= (q)) ? (p) : (q))
+#endif
+
+static size_t dopr(char *buffer, size_t maxlen, const char *format, va_list args)
+{
+       char ch;
+       LLONG value;
+       LDOUBLE 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') 
+                       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') {        /* It's a long long */
+                                       cflags = DP_C_LLONG;
+                                       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_LLONG)
+                                       value = va_arg (args, LLONG);
+                               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 = (long)va_arg (args, unsigned long int);
+                               else if (cflags == DP_C_LLONG)
+                                       value = (long)va_arg (args, unsigned LLONG);
+                               else
+                                       value = (long)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 = (long)va_arg (args, unsigned long int);
+                               else if (cflags == DP_C_LLONG)
+                                       value = (LLONG)va_arg (args, unsigned LLONG);
+                               else
+                                       value = (long)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 = (long)va_arg (args, unsigned long int);
+                               else if (cflags == DP_C_LLONG)
+                                       value = (LLONG)va_arg (args, unsigned LLONG);
+                               else
+                                       value = (long)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, LDOUBLE);
+                               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, LDOUBLE);
+                               else
+                                       fvalue = va_arg (args, double);
+                               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);
+                               break;
+                       case 'c':
+                               dopr_outch (buffer, &currlen, maxlen, va_arg (args, int));
+                               break;
+                       case 's':
+                               strvalue = va_arg (args, char *);
+                               if (max == -1) {
+                                       max = strlen(strvalue);
+                               }
+                               if (min > 0 && max >= 0 && min > max) max = min;
+                               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 = (long int)currlen;
+                               } else if (cflags == DP_C_LLONG) {
+                                       LLONG *num;
+                                       num = va_arg (args, LLONG *);
+                                       *num = (LLONG)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 (maxlen != 0) {
+               if (currlen < maxlen - 1) 
+                       buffer[currlen] = '\0';
+               else if (maxlen > 0) 
+                       buffer[maxlen - 1] = '\0';
+       }
+       
+       return currlen;
+}
+
+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;
+
+#ifdef DEBUG_SNPRINTF
+       printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value);
+#endif
+       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
+       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) 
+               dopr_outch (buffer, currlen, maxlen, convert[--place]);
+  
+       /* Left Justified spaces */
+       while (spadlen < 0) {
+               dopr_outch (buffer, currlen, maxlen, ' ');
+               ++spadlen;
+       }
+}
+
+static LDOUBLE abs_val(LDOUBLE value)
+{
+       LDOUBLE result = value;
+
+       if (value < 0)
+               result = -value;
+       
+       return result;
+}
+
+static LDOUBLE POW10(int exp)
+{
+       LDOUBLE result = 1;
+       
+       while (exp) {
+               result *= 10;
+               exp--;
+       }
+  
+       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 void 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; 
+       int caps = 0;
+       int index;
+       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;
+               my_modf(intpart*0.1, &intpart);
+               temp = temp*0.1;
+               index = (int) ((temp -intpart +0.05)* 10.0);
+               /* index = (int) (((double)(temp*0.1) -intpart +0.05) *10.0); */
+               /* printf ("%llf, %f, %x\n", temp, intpart, index); */
+               iconvert[iplace++] =
+                       (caps? "0123456789ABCDEF":"0123456789abcdef")[index];
+       } while (intpart && (iplace < 311));
+       if (iplace == 311) iplace--;
+       iconvert[iplace] = 0;
+
+       /* Convert fractional part */
+       if (fracpart)
+       {
+               do {
+                       temp = fracpart;
+                       my_modf(fracpart*0.1, &fracpart);
+                       temp = temp*0.1;
+                       index = (int) ((temp -fracpart +0.05)* 10.0);
+                       /* index = (int) ((((temp/10) -fracpart) +0.05) *10); */
+                       /* printf ("%lf, %lf, %ld\n", temp, fracpart, index); */
+                       fconvert[fplace++] =
+                       (caps? "0123456789ABCDEF":"0123456789abcdef")[index];
+               } 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) 
+               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 (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;
+       }
+       (*currlen)++;
+}
+
+#if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_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) || !defined(HAVE_C99_VSNPRINTF)
+ int snprintf(char *str,size_t count,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
+
+#endif 
+
+#ifndef HAVE_VASPRINTF
+ int vasprintf(char **ptr, const char *format, va_list ap)
+{
+       int ret;
+       
+       ret = vsnprintf(NULL, 0, format, ap);
+       if (ret <= 0) return ret;
+
+       (*ptr) = (char *)malloc(ret+1);
+       if (!*ptr) return -1;
+       ret = vsnprintf(*ptr, ret+1, format, ap);
+
+       return ret;
+}
+#endif
+
+
+#ifndef HAVE_ASPRINTF
+ int asprintf(char **ptr, const char *format, ...)
+{
+       va_list ap;
+       int ret;
+       
+       va_start(ap, format);
+       ret = vasprintf(ptr, format, ap);
+       va_end(ap);
+
+       return ret;
+}
+#endif
+
+#ifdef TEST_SNPRINTF
+int sprintf(char *str,const char *fmt,...);
+int main (void)
+{
+       char buf1[1024];
+       char buf2[1024];
+       char *fp_fmt[] = {
+               "%1.1f",
+               "%-1.5f",
+               "%1.5f",
+               "%123.9f",
+               "%10.5f",
+               "% 10.5f",
+               "%+22.9f",
+               "%+4.9f",
+               "%01.3f",
+               "%4f",
+               "%3.1f",
+               "%3.2f",
+               "%.0f",
+               "%f",
+               "-16.16f",
+               NULL
+       };
+       double fp_nums[] = { 6442452944.1234, -1.5, 134.21, 91340.2, 341.1234, 0203.9, 0.96, 0.996, 
+                            0.9996, 1.996, 4.136,  0};
+       char *int_fmt[] = {
+               "%-1.5d",
+               "%1.5d",
+               "%123.9d",
+               "%5.5d",
+               "%10.5d",
+               "% 10.5d",
+               "%+22.33d",
+               "%01.3d",
+               "%4d",
+               "%d",
+               NULL
+       };
+       long int_nums[] = { -1, 134, 91340, 341, 0203, 0};
+       char *str_fmt[] = {
+               "10.5s",
+               "5.10s",
+               "10.1s",
+               "0.10s",
+               "10.0s",
+               "1.10s",
+               "%s",
+               "%.1s",
+               "%.10s",
+               "%10s",
+               NULL
+       };
+       char *str_vals[] = {"hello", "a", "", "a longer string", NULL};
+       int x, y;
+       int fail = 0;
+       int num = 0;
+
+       printf ("Testing snprintf format codes against system sprintf...\n");
+
+       for (x = 0; fp_fmt[x] ; x++) {
+               for (y = 0; fp_nums[y] != 0 ; y++) {
+                       int l1 = snprintf(NULL, 0, fp_fmt[x], fp_nums[y]);
+                       int l2 = snprintf(buf1, sizeof(buf1), fp_fmt[x], fp_nums[y]);
+                       sprintf (buf2, fp_fmt[x], fp_nums[y]);
+                       if (strcmp (buf1, buf2)) {
+                               printf("snprintf doesn't match Format: %s\n\tsnprintf = [%s]\n\t sprintf = [%s]\n", 
+                                      fp_fmt[x], buf1, buf2);
+                               fail++;
+                       }
+                       if (l1 != l2) {
+                               printf("snprintf l1 != l2 (%d %d) %s\n", l1, l2, fp_fmt[x]);
+                               fail++;
+                       }
+                       num++;
+               }
+       }
+
+       for (x = 0; int_fmt[x] ; x++) {
+               for (y = 0; int_nums[y] != 0 ; y++) {
+                       int l1 = snprintf(NULL, 0, int_fmt[x], int_nums[y]);
+                       int l2 = snprintf(buf1, sizeof(buf1), int_fmt[x], int_nums[y]);
+                       sprintf (buf2, int_fmt[x], int_nums[y]);
+                       if (strcmp (buf1, buf2)) {
+                               printf("snprintf doesn't match Format: %s\n\tsnprintf = [%s]\n\t sprintf = [%s]\n", 
+                                      int_fmt[x], buf1, buf2);
+                               fail++;
+                       }
+                       if (l1 != l2) {
+                               printf("snprintf l1 != l2 (%d %d) %s\n", l1, l2, int_fmt[x]);
+                               fail++;
+                       }
+                       num++;
+               }
+       }
+
+       for (x = 0; str_fmt[x] ; x++) {
+               for (y = 0; str_vals[y] != 0 ; y++) {
+                       int l1 = snprintf(NULL, 0, str_fmt[x], str_vals[y]);
+                       int l2 = snprintf(buf1, sizeof(buf1), str_fmt[x], str_vals[y]);
+                       sprintf (buf2, str_fmt[x], str_vals[y]);
+                       if (strcmp (buf1, buf2)) {
+                               printf("snprintf doesn't match Format: %s\n\tsnprintf = [%s]\n\t sprintf = [%s]\n", 
+                                      str_fmt[x], buf1, buf2);
+                               fail++;
+                       }
+                       if (l1 != l2) {
+                               printf("snprintf l1 != l2 (%d %d) %s\n", l1, l2, str_fmt[x]);
+                               fail++;
+                       }
+                       num++;
+               }
+       }
+
+       printf ("%d tests failed out of %d.\n", fail, num);
+
+       printf("seeing how many digits we support\n");
+       {
+               double v0 = 0.12345678901234567890123456789012345678901;
+               for (x=0; x<100; x++) {
+                       snprintf(buf1, sizeof(buf1), "%1.1f", v0*pow(10, x));
+                       sprintf(buf2,           "%1.1f", v0*pow(10, x));
+                       if (strcmp(buf1, buf2)) {
+                               printf("we seem to support %d digits\n", x-1);
+                               break;
+                       }
+               }
+       }
+       return 0;
+}
+#endif /* SNPRINTF_TEST */
+
+
+/* -eof- */