114 lines
2.4 KiB
C
114 lines
2.4 KiB
C
/*
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* Copyright (c) 2018 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef SHELL_HISTORY_H__
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#define SHELL_HISTORY_H__
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#include <zephyr.h>
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#include <sys/util.h>
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#include <sys/dlist.h>
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#include <sys/ring_buffer.h>
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#include <stdbool.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct shell_history {
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struct ring_buf *ring_buf;
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sys_dlist_t list;
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sys_dnode_t *current;
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};
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/**
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* @brief Create shell history instance.
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*
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* @param _name History instance name.
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* @param _size Memory dedicated for shell history.
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*/
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#define SHELL_HISTORY_DEFINE(_name, _size) \
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static u8_t __noinit __aligned(sizeof(void *)) \
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_name##_ring_buf_data[_size]; \
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static struct ring_buf _name##_ring_buf = \
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{ \
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.size = _size, \
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.buf = { .buf8 = _name##_ring_buf_data } \
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}; \
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static struct shell_history _name = { \
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.ring_buf = &_name##_ring_buf \
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}
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/**
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* @brief Initialize shell history module.
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*
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* @param history Shell history instance.
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*/
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void shell_history_init(struct shell_history *history);
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/**
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* @brief Purge shell history.
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*
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* Function clears whole shell command history.
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*
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* @param history Shell history instance.
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*
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*/
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void shell_history_purge(struct shell_history *history);
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/**
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* @brief Exit history browsing mode.
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*
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* @param history Shell history instance.
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*/
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void shell_history_mode_exit(struct shell_history *history);
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/**
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* @brief Get next entry in shell command history.
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*
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* Function returns next (in given direction) stored line.
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*
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* @param[in] history Shell history instance.
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* @param[in] up Direction.
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* @param[out] dst Buffer where line is copied.
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* @param[in,out] len Buffer size (intput), amount of copied
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* data (output).
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* @return True if remains in history mode.
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*/
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bool shell_history_get(struct shell_history *history, bool up,
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u8_t *dst, u16_t *len);
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/**
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* @brief Put line into shell command history.
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*
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* If history is full, oldest entry (or entries) is removed.
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*
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* @param history Shell history instance.
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* @param line Data.
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* @param len Data length.
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*
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*/
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void shell_history_put(struct shell_history *history, u8_t *line, size_t len);
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/**
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* @brief Get state of shell history.
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*
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* @param history Shell history instance.
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*
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* @return True if in browsing mode.
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*/
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static inline bool shell_history_active(struct shell_history *history)
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{
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return (history->current) ? true : false;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* SHELL_HISTORY_H__ */
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