| /* ----------------------------------------------------------------------- * |
| * |
| * 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. |
| * |
| * ----------------------------------------------------------------------- */ |
| |
| /* |
| * rawcon_read.c |
| * |
| * Character-oriented reading from the console without echo; |
| * this is a NONBLOCKING device. |
| */ |
| |
| #include <errno.h> |
| #include <string.h> |
| #include <com32.h> |
| #include <core.h> |
| #include <minmax.h> |
| #include "file.h" |
| |
| /* Global, since it's used by stdcon_read */ |
| ssize_t __rawcon_read(struct file_info *fp, void *buf, size_t count) |
| { |
| char *bufp = buf; |
| size_t n = 0; |
| static char hi = 0; |
| static bool hi_key = false; |
| |
| (void)fp; |
| |
| while (n < count) { |
| if (hi_key) { |
| *bufp++ = hi; |
| n++; |
| hi_key = false; |
| continue; |
| } |
| |
| /* Poll */ |
| if (!pollchar()) |
| break; |
| |
| /* We have data, go get it */ |
| *bufp = getchar(&hi); |
| if (!*bufp) |
| hi_key = true; |
| |
| bufp++; |
| n++; |
| } |
| |
| return n; |
| } |
| |
| const struct input_dev dev_rawcon_r = { |
| .dev_magic = __DEV_MAGIC, |
| .flags = __DEV_TTY | __DEV_INPUT, |
| .fileflags = O_RDONLY, |
| .read = __rawcon_read, |
| .close = NULL, |
| .open = NULL, |
| }; |