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Bluetooth: AT: Command parsing for range of values

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This patch contains API's which is used to parse range of values
eg. (0,3). This patch also parses the string, reads, process and
move the buffer accordingly.

Change-Id: I8dba5b7d630f65b87967c101557c5c7ffd297dd1
Signed-off-by: Sathish Narasimman <sathish.narasimman@intel.com>
This commit is contained in:
Sathish Narasimman 2016-11-14 13:36:01 +05:30 • committed by Johan Hedberg
commit 9abbc61e4a
2 changed files with 112 additions and 0 deletions
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107
subsys/bluetooth/host/at.c
View file

@ -27,6 +27,13 @@
#include "at.h"
static void next_stream(struct at_client *at)
{
if (at->buf[at->pos] == ',') {
at->pos++;
}
}
int at_check_byte(struct net_buf *buf, char check_byte)
{
const char *str = buf->data;
@ -60,6 +67,7 @@ int at_get_number(struct at_client *at, uint32_t *val)
return -ENODATA;
}
next_stream(at);
return 0;
}
@ -339,6 +347,105 @@ int at_parse_cmd_input(struct at_client *at, struct net_buf *buf,
return 0;
}
int at_has_next_stream(struct at_client *at)
{
return at->buf[at->pos] != '\0';
}
int at_open_stream(struct at_client *at)
{
skip_whitespace(at);
/* The stream shall start with '(' open parenthesis */
if (at->buf[at->pos] != '(') {
return -ENODATA;
}
at->pos++;
return 0;
}
int at_close_stream(struct at_client *at)
{
skip_whitespace(at);
if (at->buf[at->pos] != ')') {
return -ENODATA;
}
at->pos++;
next_stream(at);
return 0;
}
int at_stream_get_string(struct at_client *at, char *name, uint8_t len)
{
int i = 0;
skip_whitespace(at);
if (at->buf[at->pos] != '"') {
return -ENODATA;
}
at->pos++;
while (at->buf[at->pos] != '\0' && at->buf[at->pos] != '"') {
if (i == len) {
return -ENODATA;
}
name[i++] = at->buf[at->pos++];
}
if (i == len) {
return -ENODATA;
}
name[i] = '\0';
if (at->buf[at->pos] != '"') {
return -ENODATA;
}
at->pos++;
skip_whitespace(at);
next_stream(at);
return 0;
}
int at_stream_get_range(struct at_client *at, uint32_t *min, uint32_t *max)
{
uint32_t low, high;
int ret;
ret = at_get_number(at, &low);
if (ret < 0) {
return ret;
}
if (at->buf[at->pos] == '-') {
at->pos++;
goto out;
}
if (!isdigit(at->buf[at->pos])) {
return -ENODATA;
}
out:
ret = at_get_number(at, &high);
if (ret < 0) {
return ret;
}
*min = low;
*max = high;
next_stream(at);
return 0;
}
void at_register(struct at_client *at, at_resp_cb_t resp, at_finish_cb_t finish)
{
at->resp = resp;

5
subsys/bluetooth/host/at.h
View file

@ -80,3 +80,8 @@ int at_parse_input(struct at_client *at, struct net_buf *buf);
int at_parse_cmd_input(struct at_client *at, struct net_buf *buf,
const char *prefix, parse_val_t func);
int at_check_byte(struct net_buf *buf, char check_byte);
int at_stream_get_range(struct at_client *at, uint32_t *min, uint32_t *max);
int at_stream_get_string(struct at_client *at, char *name, uint8_t len);
int at_close_stream(struct at_client *at);
int at_open_stream(struct at_client *at);
int at_has_next_stream(struct at_client *at);