/* deal with up arrow*/
static void
handle_up(void)
{
/*get previous history */
if (history_prev() < 0)
return;
/*copy current history cmd to out_cmd */
strcpy(cmd_strp, history_buf[history_cur]);
/*print out_cmd */
out_cmd_print();
}
char * history_readline(struct cmd_history * ht, FILE * f,
char * buf, int max)
{
int mode;
int pos;
int val;
int len;
int ctrl;
int c;
int i;
char * s;
if (isfatty(f)) {
f = ftty_lowlevel(f);
}
mode = 0;
pos = 0;
val = 0;
ctrl = 0;
len = 0;
/* reserve space for NULL termination */
max--;
for (;;) {
if ((c = fgetc(f)) == EOF) {
DCC_LOG(LOG_INFO, "EOF");
return NULL;
}
DCC_LOG1(LOG_MSG, "[%02x]", c);
switch (mode) {
case MODE_ESC:
switch (c) {
case '[':
mode = MODE_ESC_VAL1;
val = 0;
ctrl = 0;
break;
case 'O':
mode = MODE_ESC_O;
break;
default:
DCC_LOG1(LOG_INFO, "ESC:'%c'", c);
mode = 0;
};
continue;
case MODE_ESC_VAL1:
case MODE_ESC_VAL2:
switch (c) {
case '0'...'9':
val = val * 10 + c - '0';
continue;
case 'A':
/* cursor up */
DCC_LOG2(LOG_MSG, "up %d, %d", ctrl, val);
c = IN_CURSOR_UP + ctrl;
break;
case 'B':
/* cursor down */
DCC_LOG2(LOG_MSG, "down %d, %d", ctrl, val);
c = IN_CURSOR_DOWN + ctrl;
break;
case 'C':
/* cursor right */
DCC_LOG2(LOG_MSG, "right %d, %d", ctrl, val);
c = IN_CURSOR_RIGHT + ctrl;
break;
case 'D':
/* cursor left */
DCC_LOG2(LOG_MSG, "left %d, %d", ctrl, val);
c = IN_CURSOR_LEFT + ctrl;
break;
case '~':
switch (val) {
case 1:
DCC_LOG1(LOG_MSG, "home %d", ctrl);
c = IN_HOME + ctrl;
break;
case 2:
DCC_LOG1(LOG_MSG, "insert %d", ctrl);
c = IN_INSERT + ctrl;
break;
case 3:
/* delete */
DCC_LOG1(LOG_MSG, "delete %d", ctrl);
c = IN_DELETE + ctrl;
break;
case 4:
/* end */
DCC_LOG(LOG_MSG, "end");
c = IN_END + ctrl;
break;
case 5:
DCC_LOG1(LOG_MSG, "pg up %d", ctrl);
c = IN_PAGE_UP + ctrl;
break;
case 6:
DCC_LOG1(LOG_MSG, "pg down %d", ctrl);
c = IN_PAGE_DOWN + ctrl;
break;
default:
DCC_LOG1(LOG_INFO, "seq %d", val);
mode = 0;
continue;
}
break;
case ';':
mode = MODE_ESC_VAL2;
ctrl = IN_CTRL;
val = 0;
continue;
default:
DCC_LOG1(LOG_MSG, "VAL:'%c'", c);
mode = 0;
continue;
};
mode = 0;
break;
case MODE_ESC_O:
switch (c) {
case 'F':
/* end */
DCC_LOG(LOG_MSG, "end");
c = IN_END;
break;
case 'H':
/* home */
DCC_LOG(LOG_MSG, "home");
c = IN_HOME;
break;
default:
DCC_LOG1(LOG_INFO, "ESC O:'%c'", c);
mode = 0;
continue;
}
mode = 0;
break;
}
switch (c) {
case IN_ESC:
DCC_LOG(LOG_MSG, "ESC");
mode = MODE_ESC;
continue;
case IN_CURSOR_UP:
if (ht->pos == ht->head) {
buf[len] = '\0';
/* save current line on history's head */
strcpy(ht->buf + ht->pos * ht->len, buf);
}
if ((s = history_prev(ht)) == NULL)
continue;
goto set_buf;
case IN_CURSOR_DOWN:
if ((s = history_next(ht)) == NULL)
continue;
goto set_buf;
case IN_CURSOR_RIGHT:
if (pos < len)
fputc(buf[pos++], f);
else
fputs(OUT_BEL, f);
continue;
case IN_CURSOR_LEFT:
if (pos > 0) {
fputs(OUT_CURSOR_LEFT, f);
pos--;
} else {
fputs(OUT_BEL, f);
}
continue;
case IN_CTRL_CURSOR_RIGHT:
while (pos < len) {
fputc(buf[pos++], f);
if ((buf[pos - 1] != ' ') && (buf[pos] == ' '))
break;
}
continue;
case IN_CTRL_CURSOR_LEFT:
if (pos > 0) {
do {
fputs(OUT_CURSOR_LEFT, f);
pos--;
if ((buf[pos - 1] == ' ') && (buf[pos] != ' '))
break;
} while (pos > 0);
}
continue;
case IN_PAGE_UP:
continue;
case IN_PAGE_DOWN:
continue;
case IN_INSERT:
continue;
case IN_HOME:
while (pos > 0) {
fputs(OUT_CURSOR_LEFT, f);
pos--;
}
continue;
case IN_END:
while (pos < len) {
fputc(buf[pos++], f);
}
continue;
case IN_TN_BS:
DCC_LOG(LOG_MSG, "IN_TN_BS");
case IN_BS:
if (pos == 0) {
fputs(OUT_BEL, f);
continue;
}
if (len == pos) {
pos--;
len--;
fputs(OUT_BS, f);
continue;
}
fputs(OUT_CURSOR_LEFT, f);
pos--;
/* fall back */
case IN_DELETE:
if (len == pos) {
continue;
}
len--;
for (i = pos; i < len; i++) {
buf[i] = buf[i + 1];
}
buf[len] = '\0';
fputs(&buf[pos], f);
fputc(' ', f);
for (i = len + 1; i > pos; i--)
fputs(OUT_CURSOR_LEFT, f);
continue;
case IN_EOL:
buf[len] = '\0';
fputs("\r\n", f);
return buf;
case IN_SKIP:
fputs(OUT_SKIP, f);
return NULL;
}
if (len == max) {
fputs(OUT_BEL, f);
continue;
}
if (len == pos) {
fputc(c, f);
buf[pos] = c;
pos++;
len++;
continue;
}
for (i = len; i > pos; i--) {
buf[i] = buf[i - 1];
}
len++;
buf[pos] = c;
buf[len] = '\0';
fputs(&buf[pos], f);
pos++;
for (i = len; i > pos; i--)
fputs(OUT_CURSOR_LEFT, f);
continue;
set_buf:
for (i = pos; i > 0; i--)
fputs(OUT_CURSOR_LEFT, f);
strcpy(buf, s);
fputs(s, f);
pos = strlen(s);
if (pos < len) {
for (i = pos; i < len; i++)
fputc(' ', f);
for (i = pos; i < len; i++)
fputs(OUT_CURSOR_LEFT, f);
}
len = pos;
}
}
