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/* ----------------------------------------------------------------------- *
*
* 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.
*
* ----------------------------------------------------------------------- */
/*
* xserial_write.c
*
* Raw writing to the serial port; no \n -> \r\n translation, but
* convert \1# sequences.
*/
#include <errno.h>
#include <string.h>
#include <com32.h>
#include <minmax.h>
#include <colortbl.h>
#include <syslinux/config.h>
#include "file.h"
static void emit(char ch)
{
static com32sys_t ireg; /* Zeroed with the BSS */
ireg.eax.b[1] = 0x04;
ireg.edx.b[0] = ch;
__intcall(0x21, &ireg, NULL);
}
ssize_t __xserial_write(struct file_info *fp, const void *buf, size_t count)
{
const char *bufp = buf;
size_t n = 0;
static enum { st_init, st_tbl, st_tblc } state = st_init;
static int ndigits;
static int ncolor = 0;
int num;
const char *p;
(void)fp;
if (!syslinux_serial_console_info()->iobase)
return count; /* Nothing to do */
while ( count-- ) {
unsigned char ch = *bufp++;
switch (state) {
case st_init:
if (ch >= 1 && ch <= 5) {
state = st_tbl;
ndigits = ch;
} else {
emit(ch);
}
break;
case st_tbl:
if (ch == '#') {
state = st_tblc;
ncolor = 0;
} else {
state = st_init;
}
break;
case st_tblc:
num = ch-'0';
if (num < 10) {
ncolor = (ncolor*10)+num;
if (--ndigits == 0) {
if (ncolor < console_color_table_size) {
emit('\033');
emit('[');
emit('0');
emit(';');
for (p = console_color_table[ncolor].ansi; *p; p++)
emit(*p);
emit('m');
}
state = st_init;
}
} else {
state = st_init;
}
break;
}
n++;
}
return n;
}
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