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/* ----------------------------------------------------------------------- *
*
* Copyright 2004-2008 H. Peter Anvin - All Rights Reserved
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall
* be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* ----------------------------------------------------------------------- */
/*
* stdcon_write.c
*
* Writing to the console; \n -> \r\n conversion.
*/
#include <errno.h>
#include <string.h>
#include <com32.h>
#include <core.h>
#include <minmax.h>
#include "file.h"
#define BIOS_ROWS (*(uint8_t *)0x484) /* Minus one; if zero use 24 (= 25 lines) */
#define BIOS_COLS (*(uint16_t *)0x44A)
static int __stdcon_open(struct file_info *fp)
{
fp->o.rows = BIOS_ROWS + 1;
fp->o.cols = BIOS_COLS;
/* Sanity check */
if (fp->o.rows < 12)
fp->o.rows = 24;
if (fp->o.cols < 40)
fp->o.cols = 80;
return 0;
}
static ssize_t __stdcon_write(struct file_info *fp, const void *buf,
size_t count)
{
const char *bufp = buf;
size_t n = 0;
(void)fp;
while (count--) {
if (*bufp == '\n')
writechr('\r');
writechr(*bufp++);
n++;
}
return n;
}
const struct output_dev dev_stdcon_w = {
.dev_magic = __DEV_MAGIC,
.flags = __DEV_TTY | __DEV_OUTPUT,
.fileflags = O_WRONLY | O_CREAT | O_TRUNC | O_APPEND,
.write = __stdcon_write,
.close = NULL,
.open = __stdcon_open,
};
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