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/* printlen.c - return number of chars used by a printf like call
Copyright (c) 1988-1993 Miguel Santana
Copyright (c) 1995-1999 Akim Demaille, Miguel Santana
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 3, 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; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*
Note: not all the cases are implemented, so improve it
before use it!
*/
#include "system.h"
#include "printlen.h"
unsigned long strtoul ();
static int
int_printflen (const char *format, va_list ap)
{
const char *cp;
int total_width = 0;
int width = 0;
for (cp = format ; *cp ; cp++)
{
if (*cp != '%')
total_width ++;
else
{
/* A `% ' is occuring */
cp++;
width = 0;
while (strchr ("-+ #0", *cp))
++cp;
if (*cp == '*')
{
++cp;
width = abs (va_arg (ap, int));
}
if (*cp == '.')
{
++cp;
if (*cp == '*')
{
++cp;
width = abs (va_arg (ap, int));
}
}
while (strchr ("hlL", *cp))
++cp;
/* Currently not enough cases are covered */
switch (*cp)
{
case 'd':
case 'i':
case 'o':
case 'u':
case 'x':
case 'X':
case 'c':
(void) va_arg (ap, int);
break;
case 'f':
case 'e':
case 'E':
case 'g':
case 'G':
(void) va_arg (ap, double);
break;
case 's':
total_width += strlen (va_arg (ap, char *));
break;
case 'p':
case 'n':
(void) va_arg (ap, char *);
break;
}
}
}
return total_width;
}
int
vprintflen (const char *format, va_list args)
{
va_list ap;
int ret;
va_copy (ap, args);
ret = int_printflen (format, ap);
va_end(ap);
return ret;
}
int
#if defined(VA_START) && __STDC__
printflen (const char *format, ...)
#else
printflen (format, va_alist)
char * format;
va_dcl
#endif
{
va_list args;
int res;
VA_START (args, format);
res = vprintflen (format, args);
va_end (args);
return res;
}
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