/*!
* @brief read line from consult
*/
static int readline (char * prompt)
{
uint8_t len = SHELL_CB_SIZE;
int8_t rc;
char * p = console_buffer;
static uint8_t initted = 0;
/* break console_buffer so that is will not repeatable */
console_buffer[0] = '\0';
if (!initted)
{
#ifdef SHELL_CONFIG_USE_HIST
hist_init();
#endif
initted = 1;
printf("\r\nSHELL (build: %s)\r\n", __DATE__);
printf("Copyright (c) 2013 http://www.beyondcore.net\r\n");
}
if (prompt)
{
putstr (prompt);
}
rc = cread_line(prompt, p, &len);
return rc < 0 ? rc : len;
}
int ubreadline_into_buffer(const char *const prompt, char *buffer, int timeout)
{
char *p = buffer;
unsigned int len = CONFIG_SYS_CBSIZE;
int rc;
static int initted = 0;
/*
* History uses a global array which is not
* writable until after relocation to RAM.
* Revert to non-history version if still
* running from flash.
*/
if (0) {
if (!initted) {
hist_init();
initted = 1;
}
if (prompt)
printf (prompt);
rc = cread_line(prompt, p, &len, timeout);
return rc < 0 ? rc : len;
} else {
char * p_buf = p;
int n = 0; /* buffer index */
int plen = 0; /* prompt length */
int col; /* output column cnt */
char c;
/* print prompt */
if (prompt) {
plen = strlen (prompt);
printf (prompt);
}
col = plen;
for (;;) {
c = serial_getchar();
/*
* Special character handling
*/
switch (c) {
case '\r': /* Enter */
case '\n':
*p = '\0';
printf ("\r\n");
return p - p_buf;
case '\0': /* nul */
continue;
case 0x03: /* ^C - break */
p_buf[0] = '\0'; /* discard input */
return -1;
case 0x15: /* ^U - erase line */
while (col > plen) {
printf (erase_seq);
--col;
}
p = p_buf;
n = 0;
continue;
case 0x17: /* ^W - erase word */
p=delete_char(p_buf, p, &col, &n, plen);
while ((n > 0) && (*p != ' ')) {
p=delete_char(p_buf, p, &col, &n, plen);
}
continue;
case 0x08: /* ^H - backspace */
case 0x7F: /* DEL - backspace */
p=delete_char(p_buf, p, &col, &n, plen);
continue;
default:
/*
* Must be a normal character then
*/
if (n < CONFIG_SYS_CBSIZE-2) {
if (c == '\t') { /* expand TABs */
/* if auto completion triggered just continue */
*p = '\0';
if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
p = p_buf + n; /* reset */
continue;
}
printf (tab_seq+(col&07));
col += 8 - (col&07);
} else {
char buf[2];
/*
* Echo input using printf() to force an
* LCD flush if we are using an LCD
*/
++col;
buf[0] = c;
buf[1] = '\0';
printf(buf);
}
*p++ = c;
++n;
} else { /* Buffer full */
serial_putchar('\a');
}
}
}
}
}
