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#include "tnc_host.h"
#include <ctype.h>
#include <string.h>
void hybbx_tnc_host_init(hybbx_tnc_host_t *host,
hybbx_tnc_host_text_cb text_cb,
hybbx_tnc_host_event_cb event_cb,
void *userdata)
{
if (host == NULL) {
return;
}
memset(host, 0, sizeof(*host));
host->state = HYBBX_TNC_HOST_BOOT;
host->text_cb = text_cb;
host->event_cb = event_cb;
host->userdata = userdata;
}
void hybbx_tnc_host_reset(hybbx_tnc_host_t *host)
{
if (host == NULL) {
return;
}
host->line_len = 0;
host->line[0] = '\0';
host->state = HYBBX_TNC_HOST_BOOT;
}
static int host_line_ieq(const char *line, const char *prefix)
{
size_t i;
size_t plen = strlen(prefix);
for (i = 0; i < plen; i++) {
char a = (char)tolower((unsigned char)line[i]);
char b = (char)tolower((unsigned char)prefix[i]);
if (a != b) {
return 0;
}
}
return 1;
}
static void host_emit_event(hybbx_tnc_host_t *host, hybbx_tnc_host_state_t state)
{
if (host->state == state) {
return;
}
host->state = state;
if (host->event_cb != NULL) {
host->event_cb(state, host->userdata);
}
}
static void host_process_line(hybbx_tnc_host_t *host)
{
const char *line = host->line;
if (host_line_ieq(line, "cmd:") || host_line_ieq(line, "cmd: ")) {
host_emit_event(host, HYBBX_TNC_HOST_CMD);
return;
}
if (strstr(line, "***") != NULL &&
(host_line_ieq(line, "*** connected") ||
host_line_ieq(line, "*** connected ") ||
strstr(line, "CONNECTED") != NULL)) {
host_emit_event(host, HYBBX_TNC_HOST_CONNECTED);
return;
}
if (strstr(line, "***") != NULL &&
(host_line_ieq(line, "*** disconnected") ||
strstr(line, "DISCONNECTED") != NULL)) {
host_emit_event(host, HYBBX_TNC_HOST_CMD);
return;
}
if (host->state == HYBBX_TNC_HOST_CONNECTED && host->text_cb != NULL &&
line[0] != '\0') {
host->text_cb((const uint8_t *)line, strlen(line), host->userdata);
host->text_cb((const uint8_t *)"\r\n", 2, host->userdata);
}
}
static void host_push_byte(hybbx_tnc_host_t *host, uint8_t byte)
{
if (byte == '\r' || byte == '\n') {
if (host->line_len > 0) {
host->line[host->line_len] = '\0';
host_process_line(host);
host->line_len = 0;
}
return;
}
if (host->line_len + 1 >= sizeof(host->line)) {
host->line_len = 0;
return;
}
host->line[host->line_len++] = (char)byte;
}
void hybbx_tnc_host_feed(hybbx_tnc_host_t *host,
const uint8_t *data, size_t len)
{
size_t i;
if (host == NULL || data == NULL) {
return;
}
for (i = 0; i < len; i++) {
host_push_byte(host, data[i]);
}
}
size_t hybbx_tnc_host_format_cmd(const char *cmd, char *out, size_t out_cap)
{
size_t len;
if (cmd == NULL || out == NULL || out_cap < 3) {
return 0;
}
len = strlen(cmd);
if (len + 2 >= out_cap) {
return 0;
}
memcpy(out, cmd, len);
out[len++] = '\r';
out[len] = '\0';
return len;
}
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