88 lines
2.1 KiB
C
88 lines
2.1 KiB
C
/**
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* @file shell_companion.c
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* @author Letter (nevermindzzt@gmail.com)
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* @brief shell companion object support
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* @version 3.0.3
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* @date 2020-07-22
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*
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* @copyright (c) 2020 Letter
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*
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*/
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#include "shell.h"
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#if SHELL_USING_COMPANION == 1
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/**
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* @brief shell添加伴生对象
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*
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* @param shell shell对象
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* @param id 伴生对象ID
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* @param object 伴生对象
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* @return signed char 0 添加成功 -1 添加失败
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*/
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signed char shellCompanionAdd(Shell *shell, int id, void *object)
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{
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ShellCompanionObj *companions = shell->info.companions;
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ShellCompanionObj *node = SHELL_MALLOC(sizeof(ShellCompanionObj));
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SHELL_ASSERT(node, return -1);
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node->id = id;
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node->obj = object;
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node->next = companions;
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shell->info.companions = node;
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return 0;
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}
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/**
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* @brief shell删除伴生对象
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*
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* @param shell shell对象
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* @param id 伴生对象ID
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* @return signed char 0 删除成功 -1 无匹配对象
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*/
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signed char shellCompanionDel(Shell *shell, int id)
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{
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ShellCompanionObj *companions = shell->info.companions;
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ShellCompanionObj *front = companions;
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while (companions)
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{
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if (companions->id == id)
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{
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if (companions == shell->info.companions && !(companions->next))
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{
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shell->info.companions = (void *)0;
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}
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else
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{
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front->next = companions->next;
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}
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SHELL_FREE(companions);
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return 0;
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}
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front = companions;
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companions = companions->next;
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}
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return -1;
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}
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/**
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* @brief shell获取伴生对象
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*
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* @param shell shell对象
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* @param id 伴生对象ID
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* @return void* 伴生对象，无匹配对象时返回NULL
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*/
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void *shellCompanionGet(Shell *shell, int id)
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{
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SHELL_ASSERT(shell, return (void *)0);
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ShellCompanionObj *companions = shell->info.companions;
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while (companions)
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{
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if (companions->id == id)
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{
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return companions->obj;
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}
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companions = companions->next;
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}
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return (void *)0;
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}
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#endif /** SHELL_USING_COMPANION == 1 */
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