142 lines
3.2 KiB
C
142 lines
3.2 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2010-03-22 Bernard first version
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* 2012-04-27 Bernard fixed finsh_var_delete issue which
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* is found by Grissiom.
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*/
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#include "finsh_var.h"
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#include "finsh.h"
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struct finsh_var global_variable[FINSH_VARIABLE_MAX];
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struct finsh_sysvar_item *global_sysvar_list;
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int finsh_var_init()
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{
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memset(global_variable, 0, sizeof(global_variable));
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return 0;
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}
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int finsh_var_insert(const char *name, int type)
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{
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int i, empty;
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empty = -1;
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for (i = 0; i < FINSH_VARIABLE_MAX; i ++) {
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/* there is a same name variable exist. */
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if (strncmp(global_variable[i].name, name, FINSH_NAME_MAX) == 0) {
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return -1;
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}
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if (global_variable[i].type == finsh_type_unknown && empty == -1) {
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empty = i;
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}
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}
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/* there is no empty entry */
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if (empty == -1) {
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return -1;
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}
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/* insert entry */
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strncpy(global_variable[empty].name, name, FINSH_NAME_MAX);
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global_variable[empty].type = type;
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/* return the offset */
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return empty;
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}
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int finsh_var_delete(const char *name)
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{
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int i;
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for (i = 0; i < FINSH_VARIABLE_MAX; i ++) {
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if (strncmp(global_variable[i].name, name, FINSH_NAME_MAX) == 0) {
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break;
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}
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}
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/* can't find variable */
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if (i == FINSH_VARIABLE_MAX) {
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return -1;
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}
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memset(&global_variable[i], 0, sizeof(struct finsh_var));
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return 0;
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}
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struct finsh_var *finsh_var_lookup(const char *name)
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{
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int i;
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for (i = 0; i < FINSH_VARIABLE_MAX; i ++) {
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if (strncmp(global_variable[i].name, name, FINSH_NAME_MAX) == 0) {
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break;
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}
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}
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/* can't find variable */
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if (i == FINSH_VARIABLE_MAX) {
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return NULL;
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}
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return &global_variable[i];
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}
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#ifdef RT_USING_HEAP
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void finsh_sysvar_append(const char *name, uint8_t type, void *var_addr)
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{
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/* create a sysvar */
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struct finsh_sysvar_item *item;
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item = (struct finsh_sysvar_item *) rt_malloc(sizeof(struct finsh_sysvar_item));
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if (item != NULL) {
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item->next = NULL;
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item->sysvar.name = rt_strdup(name);
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item->sysvar.type = type;
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item->sysvar.var = var_addr;
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if (global_sysvar_list == NULL) {
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global_sysvar_list = item;
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} else {
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item->next = global_sysvar_list;
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global_sysvar_list = item;
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}
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}
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}
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#endif
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struct finsh_sysvar *finsh_sysvar_lookup(const char *name)
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{
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struct finsh_sysvar *index;
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struct finsh_sysvar_item *item;
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for (index = _sysvar_table_begin;
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index < _sysvar_table_end;
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FINSH_NEXT_SYSVAR(index)) {
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if (strcmp(index->name, name) == 0) {
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return index;
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}
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}
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/* find in sysvar list */
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item = global_sysvar_list;
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while (item != NULL) {
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if (strncmp(item->sysvar.name, name, strlen(name)) == 0) {
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return &(item->sysvar);
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}
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/* move to next item */
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item = item->next;
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}
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/* can't find variable */
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return NULL;
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}
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