94 lines
2.5 KiB
C
94 lines
2.5 KiB
C
|
/***************************************************************************
|
||
|
|
* __________ __ ___.
|
||
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
||
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
||
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
||
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
||
|
|
* \/ \/ \/ \/ \/
|
||
|
|
* $Id$
|
||
|
|
*
|
||
|
|
* Copyright (C) 2002 by Gary Czvitkovicz
|
||
|
|
*
|
||
|
|
* 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
|
||
|
|
* of the License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* 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 <stdio.h>
|
||
|
|
#include <stdarg.h>
|
||
|
|
#include <stdbool.h>
|
||
|
|
#include <limits.h>
|
||
|
|
#include "format.h"
|
||
|
|
|
||
|
|
/* ALSA library requires a more advanced snprintf, so let's not
|
||
|
|
override it in simulator for Linux. Note that Cygwin requires
|
||
|
|
our snprintf or it produces garbled output after a while. */
|
||
|
|
|
||
|
|
struct for_snprintf {
|
||
|
|
unsigned char *ptr; /* where to store it */
|
||
|
|
size_t bytes; /* amount already stored */
|
||
|
|
size_t max; /* max amount to store */
|
||
|
|
};
|
||
|
|
|
||
|
|
static int sprfunc(void *ptr, unsigned char letter)
|
||
|
|
{
|
||
|
|
struct for_snprintf *pr = (struct for_snprintf *)ptr;
|
||
|
|
if(pr->bytes < pr->max) {
|
||
|
|
*pr->ptr = letter;
|
||
|
|
pr->ptr++;
|
||
|
|
pr->bytes++;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
return false; /* filled buffer */
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
int snprintf(char *buf, size_t size, const char *fmt, ...)
|
||
|
|
{
|
||
|
|
bool ok;
|
||
|
|
va_list ap;
|
||
|
|
struct for_snprintf pr;
|
||
|
|
|
||
|
|
pr.ptr = (unsigned char *)buf;
|
||
|
|
pr.bytes = 0;
|
||
|
|
pr.max = size;
|
||
|
|
|
||
|
|
va_start(ap, fmt);
|
||
|
|
ok = format(sprfunc, &pr, fmt, ap);
|
||
|
|
va_end(ap);
|
||
|
|
|
||
|
|
/* make sure it ends with a trailing zero */
|
||
|
|
pr.ptr[(pr.bytes < pr.max) ? 0 : -1] = '\0';
|
||
|
|
|
||
|
|
return pr.bytes;
|
||
|
|
}
|
||
|
|
|
||
|
|
int vsnprintf(char *buf, size_t size, const char *fmt, va_list ap)
|
||
|
|
{
|
||
|
|
bool ok;
|
||
|
|
struct for_snprintf pr;
|
||
|
|
|
||
|
|
pr.ptr = (unsigned char *)buf;
|
||
|
|
pr.bytes = 0;
|
||
|
|
pr.max = size;
|
||
|
|
|
||
|
|
ok = format(sprfunc, &pr, fmt, ap);
|
||
|
|
|
||
|
|
/* make sure it ends with a trailing zero */
|
||
|
|
pr.ptr[(pr.bytes < pr.max) ? 0 : -1] = '\0';
|
||
|
|
|
||
|
|
return pr.bytes;
|
||
|
|
}
|