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/* Copyright (c) 1993
* Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
* Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
* Copyright (c) 1987 Oliver Laumann
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (see the file COPYING); if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*
****************************************************************
*/
/* Implementation of vsnprintf() for systems that don't have it
* (e.g. Solaris 2.5). This hasn't been tested much in the context of
* Mailman; it was ripped from screen 3.7.6's misc.c file which contains
* the above copyright.
*
* This code has been modified slightly:
*
* - use prototypes unconditionally
* - Don't use macros for stdargs calls
* - Reformat to Python C standard
*
* RMS says it's okay to include this code in Mailman but it should be kept
* in a separate file.
*
* TBD: This file needs a security audit.
*/
#ifndef HAVE_VSNPRINTF
#include <strings.h>
#include <stdarg.h>
int vsnprintf(char* s, size_t n, const char* fmt, va_list stack)
{
char *f, *sf = 0;
int i, on, argl = 0;
char myf[10], buf[20];
char *arg, *myfp;
on = n;
f = (char*)fmt;
arg = 0;
while (arg || (sf = index(f, '%')) || (sf = f + strlen(f))) {
if (arg == 0) {
arg = f;
argl = sf - f;
}
if (argl) {
i = argl > n - 1 ? n - 1 : argl;
strncpy(s, arg, i);
s += i;
n -= i;
if (i < argl) {
*s = 0;
return on;
}
}
arg = 0;
if (sf == 0)
continue;
f = sf;
sf = 0;
if (!*f)
break;
myfp = myf;
*myfp++ = *f++;
while (((*f >= '0' && *f <='9') || *f == '#')
&& myfp - myf < 8)
{
*myfp++ = *f++;
}
*myfp++ = *f;
*myfp = 0;
if (!*f++)
break;
switch(f[-1])
{
case '%':
arg = "%";
break;
case 'c':
case 'o':
case 'd':
case 'x':
i = va_arg(stack, int);
sprintf(buf, myf, i);
arg = buf;
break;
case 's':
arg = va_arg(stack, char *);
if (arg == 0)
arg = "NULL";
break;
default:
arg = "";
break;
}
argl = strlen(arg);
}
*s = 0;
return on - n;
va_end(stack);
}
#endif /* !HAVE_VSNPRINTF */
/*
* Local Variables:
* c-file-style: "python"
* End:
*/
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