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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Gary Czvitkovicz
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
/*
* Minimal printf and snprintf formatting functions
*
* These support %c %s %d and %x
* Field width and zero-padding flag only
*/
#include <stdarg.h>
#include <string.h>
static const char hexdigit[] = "0123456789ABCDEF";
int vsnprintf (char *buf, int size, const char *fmt, va_list ap)
{
char *bp = buf;
char *end = buf + size - 1;
char *str;
char tmpbuf[12], pad;
int ch, width, val, sign;
tmpbuf[sizeof tmpbuf - 1] = '\0';
while ((ch = *fmt++) != '\0' && bp < end)
{
if (ch == '%')
{
ch = *fmt++;
pad = ' ';
if (ch == '0')
pad = '0';
width = 0;
while (ch >= '0' && ch <= '9')
{
width = 10*width + ch - '0';
ch = *fmt++;
}
str = tmpbuf + sizeof tmpbuf - 1;
switch (ch)
{
case 'c':
*--str = va_arg (ap, int);
break;
case 's':
str = va_arg (ap, char*);
break;
case 'd':
val = sign = va_arg (ap, int);
if (val < 0)
val = -val;
do
{
*--str = (val % 10) + '0';
val /= 10;
}
while (val > 0);
if (sign < 0)
*--str = '-';
break;
case 'x':
case 'X':
val = va_arg (ap, int);
do
{
*--str = hexdigit[val & 0xf];
val >>= 4;
}
while (val > 0);
break;
default:
*--str = ch;
break;
}
if (width > 0)
{
width -= strlen (str);
while (width-- > 0 && buf < end)
*bp++ = pad;
}
while (*str != '\0' && buf < end)
*bp++ = *str++;
}
else
*bp++ = ch;
}
*bp++ = '\0';
return bp - buf - 1;
}
int snprintf (char *buf, int size, const char *fmt, ...)
{
int n;
va_list ap;
va_start (ap, fmt);
n = vsnprintf (buf, size, fmt, ap);
va_end (ap);
return n;
}
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