diff options
Diffstat (limited to 'contrib/syslinux-4.02/com32/lib/sys/stdcon_read.c')
-rw-r--r-- | contrib/syslinux-4.02/com32/lib/sys/stdcon_read.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/com32/lib/sys/stdcon_read.c b/contrib/syslinux-4.02/com32/lib/sys/stdcon_read.c new file mode 100644 index 0000000..967e564 --- /dev/null +++ b/contrib/syslinux-4.02/com32/lib/sys/stdcon_read.c @@ -0,0 +1,76 @@ +/* ----------------------------------------------------------------------- * + * + * 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_read.c + * + * Line-oriented reading from the standard console + */ + +#include <errno.h> +#include <string.h> +#include <com32.h> +#include <minmax.h> +#include "file.h" + +extern ssize_t __rawcon_read(struct file_info *fp, void *buf, size_t count); + +static ssize_t __stdcon_read(struct file_info *fp, void *buf, size_t count) +{ + char *bufp = buf; + size_t n = 0; + char ch; + + (void)fp; + + while (n < count) { + if (fp->i.nbytes) { + ch = *bufp++ = *fp->i.datap++; + fp->i.nbytes--; + n++; + if (ch == '\n') + return n; + } else { + fp->i.nbytes = __line_input(fp, fp->i.buf, MAXBLOCK, __rawcon_read); + fp->i.datap = fp->i.buf; + + if (fp->i.nbytes == 0) + return n; + } + } + + return n; +} + +const struct input_dev dev_stdcon_r = { + .dev_magic = __DEV_MAGIC, + .flags = __DEV_TTY | __DEV_INPUT, + .fileflags = O_RDONLY, + .read = __stdcon_read, + .close = NULL, + .open = NULL, +}; |