void console_write(console_t* const console, const char* message) {
char c;
const lcd_color_t prior_background = lcd_set_background(console->lcd, console->background);
const lcd_color_t prior_foreground = lcd_set_foreground(console->lcd, console->foreground);
while( (c = *(message++)) != 0 ) {
const lcd_glyph_t* const glyph = lcd_get_glyph(console->lcd, c);
if( (console->x + glyph->advance) > console->lcd->size.w ) {
console_crlf(console);
}
lcd_draw_char(
console->lcd,
console->x,
lcd_scroll_area_y(console->lcd, console->y),
c
);
console->x += glyph->advance;
}
lcd_set_background(console->lcd, prior_background);
lcd_set_foreground(console->lcd, prior_foreground);
}
void console_writeln(console_t* const console, const char* message) {
console_write(console, message);
console_crlf(console);
}
int console_readline(char *prompt,char *str,int maxlen)
{
int reading = 1;
int ch;
int idx = 0;
int len = 0;
int t;
int klen;
int recall;
int nosave = 0;
char *x;
char env[10];
console_inreadline++;
recall = console_nextsave;
if (console_savedlines[console_nextsave]) {
KFREE(console_savedlines[console_nextsave]);
console_savedlines[console_nextsave] = NULL;
}
console_savedlines[console_nextsave] = strdup("");
if (prompt && *prompt) console_write(prompt,strlen(prompt));
POLL();
while (reading) {
/*
* If someone used console_log (above) or hit Control-C (below),
* redisplay the prompt and the string we've got so far.
*/
if (console_redisplay) {
if (prompt && *prompt) console_write(prompt,strlen(prompt));
console_write(str,idx);
console_redisplay = 0;
continue;
}
#if defined(CONFIG_MIPS_BRCM)
/*
* If a background process has set the global g_console_abort flag, stop
* reading from the keyboard.
*/
if (g_console_abort) {
g_console_abort = 0;
break;
}
#endif
/*
* if nobody's typed anything, keep polling
*/
if (console_status() == 0) {
POLL();
continue;
}
/*
* Get the char from the keyboard
*/
ch = console_readkey();
if (ch < 0) break;
if (ch == 0) continue;
/*
* And dispatch it. Lots of yucky character manipulation follows
*/
switch (ch) {
case CTRL('C'): /* Ctrl-C - cancel line */
console_write("^C\r\n",4);
console_redisplay = 1;
nosave = 1;
idx = 0;
break;
case 0x7f: /* Backspace, Delete */
case CTRL('H'):
if (idx > 0) {
nosave = 0;
len--;
idx--;
console_write("\b",1);
if (len != idx) {
for (t = idx; t < len; t++) str[t] = str[t+1];
console_write(&str[idx],len-idx);
console_whiteout(1);
console_backspace(len-idx);
}
else {
console_whiteout(1);
}
}
break;
case CTRL('D'): /* Ctrl-D */
if ((idx >= 0) && (len != idx)) {
nosave = 0;
len--;
for (t = idx; t < len; t++) str[t] = str[t+1];
console_write(&str[idx],len-idx);
console_whiteout(1);
console_backspace(len-idx);
}
break;
case CTRL('B'): /* cursor left */
case VKEY_LEFT:
if (idx > 0) {
idx--;
console_backspace(1);
}
break;
case CTRL('F'): /* cursor right */
case VKEY_RIGHT:
if (idx < len) {
console_write(&str[idx],1);
idx++;
}
break;
case CTRL('A'): /* cursor to BOL */
console_backspace(idx);
idx = 0;
break;
case CTRL('E'): /* cursor to EOL */
if (len-idx > 0) console_write(&str[idx],len-idx);
idx = len;
break;
case CTRL('K'): /* Kill to EOL */
if (idx != len) {
str[len] = '\0';
if (console_killbuffer) KFREE(console_killbuffer);
console_killbuffer = strdup(&str[idx]);
console_whiteout(len-idx);
len = idx;
nosave = 0;
}
break;
case CTRL('Y'): /* Yank killed data */
if (console_killbuffer == NULL) break;
klen = strlen(console_killbuffer);
if (klen == 0) break;
if (len + klen > maxlen) break;
nosave = 0;
for (t = len + klen; t > idx; t--) {
str[t-1] = str[t-klen-1];
}
for (t = 0; t < klen; t++) str[t+idx] = console_killbuffer[t];
len += klen;
console_write(&str[idx],len-idx);
idx += klen;
console_backspace(len-idx-1);
break;
case CTRL('R'): /* Redisplay line */
str[len] = 0;
console_crlf();
console_write(prompt,strlen(prompt));
console_write(str,len);
console_backspace(len-idx);
break;
case CTRL('U'): /* Cancel line */
console_backspace(idx);
console_eraseeol();
if (len > 0) nosave = 1;
idx = 0;
len = 0;
break;
case CTRL('M'): /* terminate */
case CTRL('J'):
console_crlf();
reading = 0;
break;
case CTRL('P'):
case VKEY_UP: /* recall previous line */
t = recall;
t--;
if (t < 0) t = MAXSAVELINES-1;
if (console_savedlines[t] == NULL) break;
recall = t;
console_backspace(idx);
strcpy(str,console_savedlines[recall]);
len = idx = strlen(console_savedlines[recall]);
console_eraseeol();
console_write(str,len);
nosave = (t == ((console_nextsave - 1) % MAXSAVELINES));
break;
case CTRL('N'):
case VKEY_DOWN: /* Recall next line */
t = recall;
t++;
if (t == MAXSAVELINES) t = 0;
if (console_savedlines[t] == NULL) break;
recall = t;
console_backspace(idx);
strcpy(str,console_savedlines[recall]);
len = idx = strlen(console_savedlines[recall]);
console_eraseeol();
console_write(str,len);
nosave = 1;
break;
case VKEY_F1:
case VKEY_F2:
case VKEY_F3:
case VKEY_F4:
case VKEY_F5:
case VKEY_F6:
case VKEY_F7:
case VKEY_F8:
case VKEY_F9:
case VKEY_F10:
case VKEY_F11:
case VKEY_F12:
sprintf(env,"F%d",ch-VKEY_F1+1);
x = env_getenv(env);
if (x) {
console_backspace(idx);
strcpy(str,x);
idx = len = strlen(str);
console_eraseeol();
console_write(str,len);
console_crlf();
reading = 0;
nosave = 1;
}
/*
* If F12 is undefined, it means "repeat last command"
*/
if (ch == VKEY_F12) {
t = recall;
t--;
if (t < 0) t = MAXSAVELINES-1;
if (console_savedlines[t] == NULL) break;
recall = t;
console_backspace(idx);
strcpy(str,console_savedlines[recall]);
len = idx = strlen(console_savedlines[recall]);
console_eraseeol();
console_write(str,len);
console_crlf();
reading = 0;
nosave = 1;
}
break;
default: /* insert character */
if (ch >= ' ') {
if (idx < (maxlen-1)) {
nosave = 0;
for (t = len; t > idx; t--) {
str[t] = str[t-1];
}
str[idx] = ch;
len++;
if (len != idx) {
console_write(&str[idx],len-idx);
console_backspace(len-idx-1);
}
idx++;
}
}
break;
}
}
POLL();
console_inreadline--;
str[len] = 0;
if ((len != 0) && !nosave) {
if (console_savedlines[console_nextsave]) {
KFREE(console_savedlines[console_nextsave]);
}
console_savedlines[console_nextsave] = strdup(str);
console_nextsave++;
if (console_nextsave == MAXSAVELINES) console_nextsave = 0;
}
return len;
}