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/**************************************************************************
*
* Copyright (c) 2013 Alcatel-Lucent
*
* Alcatel Lucent licenses this file to You under the Apache License,
* Version 2.0 (the "License"); you may not use this file except in
* compliance with the License. A copy of the License is contained the
* file LICENSE at the top level of this repository.
* You may also obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
**************************************************************************
*
* term.c:
*
* This file contains miscellaneous snippets of code that will allow
* umon to talk to a vt100-compatible terminal.
*
* Original author: Ed Sutter (ed.sutter@alcatel-lucent.com)
*
*/
#include "config.h"
#include "genlib.h"
#include "timer.h"
#include "term.h"
#if INCLUDE_TERM
static int
gettermtype(void)
{
char *term = getenv("TERM");
int termtype = TERMTYPE_UNDEFINED;
if (term != 0) {
if (strcasecmp(term,"VT100") == 0)
termtype = TERMTYPE_VT100;
}
return(termtype);
}
int
term_settextcolor(int fg)
{
if (gettermtype() == TERMTYPE_VT100) {
printf("%c[%dm", 0x1B, fg + 30);
return(0);
}
return(-1);
}
int
term_setbgcolor(int bg)
{
if (gettermtype() == TERMTYPE_VT100) {
printf("%c[%dm", 0x1B, bg + 40);
return(0);
}
return(-1);
}
int
term_settextattribute(int attr)
{
if (gettermtype() == TERMTYPE_VT100) {
printf("%c[%dm", 0x1B, attr);
return(0);
}
return(-1);
}
int
term_resettext(void)
{
if (gettermtype() == TERMTYPE_VT100) {
printf("%c[0m",0x1b);
return(0);
}
return(-1);
}
/* term_getsize():
* Attempt to query the terminal for its row/col values...
*/
int
term_getsize(int *rows, int *cols)
{
int c, i, rtot, ctot;
char *semi, buf[16];
struct elapsed_tmr tmr;
if (gettermtype() == TERMTYPE_UNDEFINED)
return(-1);
setenv("ROWS",0);
setenv("COLS",0);
/* Send the "what is your terminal size?" request...
*/
printf("\E[6n");
/* Wait for a response that looks like: "ESC[rrr;cccR"
* where 'rrr' is the number of rows, and 'ccc' is the
* number of columns.
*/
memset(buf,0,sizeof(buf));
startElapsedTimer(&tmr,1000);
for(i=0;i<sizeof(buf);i++) {
while (!gotachar()) {
if(msecElapsed(&tmr)) {
return(-1);
}
}
c = getchar();
if ((i == 0) && (c != 0x1b)) {
return(-1);
}
if ((i == 1) && (c != '[')) {
return(-1);
}
if (c == 'R')
break;
buf[i] = c;
}
if (i == sizeof(buf)) {
return(-1);
}
semi = strchr(buf,';');
if (semi == (char *)0) {
return(-1);
}
*semi = 0;
buf[i] = 0;
rtot = atoi(buf+2);
ctot = atoi(semi+1);
shell_sprintf("ROWS","%d",rtot);
shell_sprintf("COLS","%d",ctot);
if (rows) *rows = rtot;
if (cols) *cols = ctot;
return(0);
}
void
term_clearscreen(void)
{
if (gettermtype() == TERMTYPE_VT100)
printf("\E[0J");
}
#endif
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