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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2010-03-22 Bernard first version
* 2012-04-27 Bernard fixed finsh_var_delete issue which
* is found by Grissiom.
*/
#include <finsh.h>
#include "finsh_var.h"
struct finsh_var global_variable[FINSH_VARIABLE_MAX];
struct finsh_sysvar_item* global_sysvar_list;
int finsh_var_init()
{
memset(global_variable, 0, sizeof(global_variable));
return 0;
}
int finsh_var_insert(const char* name, int type)
{
int i, empty;
empty = -1;
for (i = 0; i < FINSH_VARIABLE_MAX; i ++)
{
/* there is a same name variable exist. */
if (strncmp(global_variable[i].name, name, FINSH_NAME_MAX) == 0)
return -1;
if (global_variable[i].type == finsh_type_unknown && empty == -1)
{
empty = i;
}
}
/* there is no empty entry */
if (empty == -1) return -1;
/* insert entry */
strncpy(global_variable[empty].name, name, FINSH_NAME_MAX);
global_variable[empty].type = type;
/* return the offset */
return empty;
}
int finsh_var_delete(const char* name)
{
int i;
for (i = 0; i < FINSH_VARIABLE_MAX; i ++)
{
if (strncmp(global_variable[i].name, name, FINSH_NAME_MAX) == 0)
break;
}
/* can't find variable */
if (i == FINSH_VARIABLE_MAX) return -1;
memset(&global_variable[i], 0, sizeof(struct finsh_var));
return 0;
}
struct finsh_var* finsh_var_lookup(const char* name)
{
int i;
for (i = 0; i < FINSH_VARIABLE_MAX; i ++)
{
if (strncmp(global_variable[i].name, name, FINSH_NAME_MAX) == 0)
break;
}
/* can't find variable */
if (i == FINSH_VARIABLE_MAX) return NULL;
return &global_variable[i];
}
#ifdef RT_USING_HEAP
void finsh_sysvar_append(const char* name, uint8_t type, void* var_addr)
{
/* create a sysvar */
struct finsh_sysvar_item* item;
item = (struct finsh_sysvar_item*) rt_malloc (sizeof(struct finsh_sysvar_item));
if (item != NULL)
{
item->next = NULL;
item->sysvar.name = rt_strdup(name);
item->sysvar.type = type;
item->sysvar.var = var_addr;
if (global_sysvar_list == NULL)
{
global_sysvar_list = item;
}
else
{
item->next = global_sysvar_list;
global_sysvar_list = item;
}
}
}
#endif
struct finsh_sysvar* finsh_sysvar_lookup(const char* name)
{
struct finsh_sysvar* index;
struct finsh_sysvar_item* item;
for (index = _sysvar_table_begin;
index < _sysvar_table_end;
FINSH_NEXT_SYSVAR(index))
{
if (strcmp(index->name, name) == 0)
return index;
}
/* find in sysvar list */
item = global_sysvar_list;
while (item != NULL)
{
if (strncmp(item->sysvar.name, name, strlen(name)) == 0)
{
return &(item->sysvar);
}
/* move to next item */
item = item->next;
}
/* can't find variable */
return NULL;
}
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