78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
#ident "$Id: stdcon_read.c,v 1.3 2004/11/23 23:43:02 hpa Exp $"
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/* ----------------------------------------------------------------------- *
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*
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* Copyright 2004 H. Peter Anvin - All Rights Reserved
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom
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* the Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall
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* be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* ----------------------------------------------------------------------- */
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/*
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* stdcon_read.c
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*
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* Line-oriented reading from the standard console
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*/
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#include <errno.h>
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#include <string.h>
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#include <com32.h>
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#include <minmax.h>
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#include "file.h"
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extern ssize_t __rawcon_read(struct file_info *fp, void *buf, size_t count);
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static ssize_t __stdcon_read(struct file_info *fp, void *buf, size_t count)
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{
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char *bufp = buf;
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size_t n = 0;
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char ch;
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(void)fp;
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while ( n < count ) {
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if ( fp->i.nbytes ) {
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ch = *bufp++ = *fp->i.datap++;
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fp->i.nbytes--;
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n++;
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if ( ch == '\n' )
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return n;
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} else {
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fp->i.nbytes = __line_input(fp, fp->i.buf, MAXBLOCK,
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__rawcon_read);
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fp->i.datap = fp->i.buf;
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if ( fp->i.nbytes == 0 )
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return n;
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}
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}
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return n;
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}
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const struct input_dev dev_stdcon_r = {
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.dev_magic = __DEV_MAGIC,
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.flags = __DEV_TTY | __DEV_INPUT,
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.fileflags = O_RDONLY,
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.read = __stdcon_read,
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.close = NULL,
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};
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