blob: b1b6d475be1efb0b3cf689373e5f5374dbf69854 [file] [log] [blame]
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2009 coresystems GmbH
*
* 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; version 2 of
* the License.
*
* 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., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include <string.h>
#include <console/vtxprintf.h>
#include <trace.h>
struct vsnprintf_context
{
char *str_buf;
size_t buf_limit;
};
static void str_tx_byte(unsigned char byte, void *data)
{
struct vsnprintf_context *ctx = data;
if (ctx->buf_limit) {
*ctx->str_buf = byte;
ctx->str_buf++;
ctx->buf_limit--;
}
}
static int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
{
int i;
struct vsnprintf_context ctx;
DISABLE_TRACE;
ctx.str_buf = buf;
ctx.buf_limit = size ? size - 1 : 0;
i = vtxdprintf(str_tx_byte, fmt, args, &ctx);
if (size)
*ctx.str_buf = '\0';
ENABLE_TRACE;
return i;
}
int sprintf(char *buf, const char *fmt, ...)
{
va_list args;
int i;
va_start(args, fmt);
/* A trick: we have at most (size_t)-1 adressable space anyway, so
if we output so much we'll crash anyway. */
i = vsnprintf(buf, -1, fmt, args);
va_end(args);
return i;
}
int snprintf(char *buf, size_t size, const char *fmt, ...)
{
va_list args;
int i;
va_start(args, fmt);
i = vsnprintf(buf, size, fmt, args);
va_end(args);
return i;
}