From d4372855f00cb47ccfa60db79c5ee35c17f96707 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Sun, 25 Feb 2024 22:28:09 -0500 Subject: kernel: Move video console code This commit introduces a video console driver to Hyra and replaces that weird tty.c file used only for video console logic Signed-off-by: Ian Moffett --- sys/dev/vcons/vcons_io.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) create mode 100644 sys/dev/vcons/vcons_io.c (limited to 'sys/dev/vcons/vcons_io.c') diff --git a/sys/dev/vcons/vcons_io.c b/sys/dev/vcons/vcons_io.c new file mode 100644 index 0000000..569cce6 --- /dev/null +++ b/sys/dev/vcons/vcons_io.c @@ -0,0 +1,74 @@ +/* + * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Hyra nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include +#include +#include +#include + +static void +vcons_expand_tab(struct vcons_screen *scr) +{ + for (size_t i = 0; i < VCONS_TAB_WIDTH; ++i) { + vcons_putch(scr, ' '); + } +} + +/* + * This routine tries to process the output `c'. + * + * Returns < 0 value on failure. Values >= 0 + * is `c' which may differ from the original. + * + * This routine also may modify the screen state + * if `c' is a control character. + */ +int +vcons_process_output(struct vcons_screen *scr, int c) +{ + struct termios termios = scr->termios; + + switch (c) { + case ASCII_LF: + if (__TEST(termios.c_oflag, OCRNL)) + scr->cpy_x = 0; + scr->cpy_y++; + break; + case ASCII_CR: + scr->cpy_x = 0; + break; + case ASCII_HT: + vcons_expand_tab(scr); + break; + default: + return -1; + } + + return c; +} -- cgit v1.2.3