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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* cli.c
*
* Thu Jun 6 20:20:20 CEST 2013
* Copyright 2013 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of Pedal2Metal.
*
* Pedal2Metal is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Pedal2Metal is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Pedal2Metal; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "cli.h"
#include <stdarg.h>
#include <string.h>
#include "uart.h"
void cli_init()
{
uart_init(0, 115200);
}
void cli_write(const char *buf, unsigned int size)
{
uart_send(0, buf, size);
}
int cli_read(char *buf, unsigned int size)
{
uart_receive(0, buf, size);
return 0;
}
/*
static int cli_strlen(char *p0)
{
char *p = p0;
while(*p) p++;
return p - p0;
}
*/
static inline void cli_write_int(int i)
{
if(i < 0) {
uart_send(0, "-", 1);
i *= -1;
}
char buf[] = "\0\0";
int pos = 1000000000;
int tvaersum = 0;
while(pos) {
int res = i / pos;
i -= res * pos;
tvaersum += res;
if(tvaersum || pos == 1) {
buf[0] = res + '0';
cli_write(buf, 1);
}
pos /= 10;
}
}
static inline char *cli_to_hex(char i)
{
static const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
static char buf[] = { 'f', 'f', 0 };
buf[0] = hex[i / 16];
buf[1] = hex[i % 16];
return buf;
}
static int cli_write_format(const char *fmt, va_list ap)
{
char buf[] = "\0\0";
const char *p = fmt;
while(*p) {
if(*p != '%') {
buf[0] = *p;
cli_write(buf, 1);
if(*p == '\n') cli_write("\r", 1); // also write carrige return.
} else {
p++;
if(!*p) {
return 1; // Error: Invalid format string
}
if(*p == '%') cli_write("%", 1);
if(*p == 'd') cli_write_int(va_arg(ap, int));
if(*p == 'c') {
buf[0] = va_arg(ap, int);
cli_write(buf, 1);
}
if(*p == 'x') {
char *c = va_arg(ap, char *);
size_t sz = va_arg(ap, int);
while(sz) {
cli_write(cli_to_hex(*c), 2);
c++; sz--;
}
}
if(*p == 's') {
char *str = va_arg(ap, char *);
while(*str) {
cli_write(str, 1);
str++;
}
}
}
p++;
}
// If last character wasn't a newline, print one.
//if(p > fmt && *(p - 1) != '\n') cli_write("\n\r", 2);
return 0;
}
int cli_printf(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
cli_write_format(fmt, ap);
va_end(ap);
return 0;
}
int cli_readline(char *cmd, unsigned int size)
{
char buf[2] = { };
unsigned int cmdpos = 0;
int parsing = 1;
while(parsing &&
cmdpos < (size - 1)) // Make sure we have room for the terminating zero.
{
cli_read(buf, 1); // read one byte
switch(*buf) {
case '\n':
case '\r':
parsing = 0; // break out of parse loop.
break;
case '\b': // backspace
if(cmdpos) {
cmdpos--;
cli_write("\b \b", 3); // erase last written character from echo.
continue;
}
break;
case 27: // ignore 'ESC' sent on arrow keys.
// NOTE: Sequence ESC, '[', 'D' is left arrow.
// Sequence ESC, '[', 'C' is right arrow.
continue;
default:
cmd[cmdpos++] = *buf;
break;
}
// Echo
cli_write(buf, 1); // write one byte
}
cmd[cmdpos++] = '\0';
return cmdpos;
}
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