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shell: improved shell_prompt_change function

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Shell will store only pointer to the prompt string instead of
copying it to the RAM buffer. It will save RAM memory and
it will simplify implementation of a  new feature: "select"
command. When a command will be selected than shell will
display command syntax as a prompt.

Removed obsolete ASSERT check in a static function.

Signed-off-by: Jakub Rzeszutko <jakub.rzeszutko@nordicsemi.no>
This commit is contained in:
Jakub Rzeszutko 2019-02-08 15:37:40 +01:00 • committed by Anas Nashif
commit 090ef041e8
6 changed files with 22 additions and 35 deletions
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13
include/shell/shell.h
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@ -401,6 +401,8 @@ enum shell_signal {
* @brief Shell instance context.
*/
struct shell_ctx {
const char *prompt; /*!< shell current prompt. */
enum shell_state state; /*!< Internal module state.*/
enum shell_receive_state receive_state;/*!< Escape sequence indicator.*/
@ -447,7 +449,7 @@ enum shell_flag {
* @brief Shell instance internals.
*/
struct shell {
char *const prompt; /*!< shell prompt. */
const char *default_prompt; /*!< shell default prompt. */
const struct shell_transport *iface; /*!< Transport interface.*/
struct shell_ctx *ctx; /*!< Internal context.*/
@ -475,7 +477,7 @@ extern void shell_print_stream(const void *user_ctx, const char *data,
* @brief Macro for defining a shell instance.
*
* @param[in] _name Instance name.
* @param[in] _prompt Shell prompt string.
* @param[in] _prompt Shell default prompt string.
* @param[in] _transport_iface Pointer to the transport interface.
* @param[in] _log_queue_size Logger processing queue size.
* @param[in] _log_timeout Logger thread timeout in milliseconds on full
@ -488,7 +490,6 @@ extern void shell_print_stream(const void *user_ctx, const char *data,
_log_queue_size, _log_timeout, _shell_flag) \
static const struct shell _name; \
static struct shell_ctx UTIL_CAT(_name, _ctx); \
static char _name##prompt[CONFIG_SHELL_PROMPT_LENGTH + 1] = _prompt; \
static u8_t _name##_out_buffer[CONFIG_SHELL_PRINTF_BUFF_SIZE]; \
SHELL_LOG_BACKEND_DEFINE(_name, _name##_out_buffer, \
CONFIG_SHELL_PRINTF_BUFF_SIZE, \
@ -502,7 +503,7 @@ extern void shell_print_stream(const void *user_ctx, const char *data,
static K_THREAD_STACK_DEFINE(_name##_stack, CONFIG_SHELL_STACK_SIZE); \
static struct k_thread _name##_thread; \
static const struct shell _name = { \
.prompt = _name##prompt, \
.default_prompt = _prompt, \
.iface = _transport_iface, \
.ctx = &UTIL_CAT(_name, _ctx), \
.history = SHELL_HISTORY_PTR(_name), \
@ -660,9 +661,9 @@ void shell_process(const struct shell *shell);
* @param[in] prompt New shell prompt.
*
* @return 0 Success.
* @return -ENOMEM New prompt is too long.
* @return -EINVAL Pointer to new prompt is not correct.
*/
int shell_prompt_change(const struct shell *shell, char *prompt);
int shell_prompt_change(const struct shell *shell, const char *prompt);
/**
* @brief Prints the current command help.