| /* ----------------------------------------------------------------------- * |
| * |
| * 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, |
| }; |