src/console/vsprintf.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2009 coresystems GmbH
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; version 2 of
   9  * the License.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
  19  * MA 02110-1301 USA
  20  */
  21
  22 #include <string.h>
  23 #include <smp/spinlock.h>
  24 #include <console/vtxprintf.h>
  25
  26 DECLARE_SPIN_LOCK(vsprintf_lock)
  27
  28 static char *str_buf;
  29
  30 static void str_tx_byte(unsigned char byte)
  31 {
  32         *str_buf = byte;
  33         str_buf++;
  34 }
  35
  36 static int vsprintf(char *buf, const char *fmt, va_list args)
  37 {
  38         int i;
  39
  40         spin_lock(&vsprintf_lock);
  41
  42         str_buf = buf;
  43         i = vtxprintf(str_tx_byte, fmt, args);
  44         *str_buf = '\0';
  45
  46         spin_unlock(&vsprintf_lock);
  47
  48         return i;
  49 }
  50
  51 int sprintf(char *buf, const char *fmt, ...)
  52 {
  53         va_list args;
  54         int i;
  55
  56         va_start(args, fmt);
  57         i = vsprintf(buf, fmt, args);
  58         va_end(args);
  59
  60         return i;
  61 }