Neovim命令行窗口插件cmdbuf.nvim使用教程

需积分: 14 0 下载量 138 浏览量 更新于2024-11-25 收藏 18KB ZIP 举报
资源摘要信息:"cmdbuf.nvim:Neovim的备用命令行窗口插件" Neovim是一款流行的文本编辑器,是Vim编辑器的现代分支版本,专注于提供更加轻量级、高效和易于扩展的体验。Neovim允许用户使用Lua语言编写插件,以提供额外的功能和增强编辑器的能力。本文介绍的cmdbuf.nvim插件便是利用这一特点,为Neovim提供了一个备用的命令行窗口,允许用户更加灵活和高效地使用Neovim的命令行功能。 cmdbuf.nvim插件通过创建一个专门的缓冲区来模拟命令行窗口的功能。这个缓冲区可以在不影响主编辑区的情况下,进行命令行操作。用户可以通过该插件提供的映射快速打开和关闭这个备用命令行窗口,从而在视觉上区分命令行操作和普通编辑任务。这在处理复杂的命令行操作时尤其有用,因为它可以减少上下文切换的成本。 描述中提供的例子显示了如何使用Neovim的内置函数`nnoremap`和`cnoremap`来定义普通模式和命令模式下的快捷键映射。`nnoremap`用于普通模式下的操作,而`cnoremap`用于命令行模式下的操作。具体的映射命令为`q`和`<C>`,它们分别被定义为打开备用命令行窗口。 在例子中,`require('cmdbuf').split_open()`函数被用来打开备用命令行窗口,它接受不同的参数来设置窗口的高度和配置其他特定选项。例如,`vim.o.cmdwinheight`设置了命令行窗口的高度,而`{ line = vim.fn.getcmdline(), column = vim.fn.getcmdpos() }`则用于恢复之前命令行窗口中光标的精确位置。 此外,描述中还提到了如何在Neovim的自动命令组`augroup`中设置自定义命令。在这个例子中,当发生特定用户事件时,通过`augroup cmdbuf_setting`设置自动命令,调用一个名为`s:cmdbuf()`的自定义函数。这个函数可能是用户定义的,用于初始化或配置cmdbuf.nvim插件的某些特定行为。 在标签中提到的"Lua"是Neovim用于编写插件的主要脚本语言。Lua以其简洁的语法和强大的扩展性而闻名,非常适合用于编写Neovim插件。cmdbuf.nvim插件就是使用Lua编写,使得插件既易于阅读和维护,又能很好地与Neovim集成。 文件名称列表中的"cmdbuf.nvim-main"表明,插件可能包含一个主要的入口文件,这个文件是整个插件的核心部分,负责插件的初始化和核心功能的实现。 综上所述,cmdbuf.nvim插件为Neovim的命令行操作提供了更为高效和便捷的解决方案,通过Lua语言编写,能够更好地融入Neovim的生态系统。用户通过定义简单的映射和自动命令,便可以享受到一个备用命令行窗口带来的便捷,提高编辑效率和使用体验。

enum Choose { TcpHeartbeat=200, TcpExeCmd }; struct DataPacket { int clientSockfd; enum Choose choose; char *cmdBuf; char *returnValue; }; struct DataPacket datapacket; struct DataPacket ReceivePackets; int InitializePointer(char option[]) { next: if (strstr(option, "init")) { ReceivePackets.cmdBuf = calloc(BUFFER_SIZE, sizeof(char)); ReceivePackets.returnValue = calloc(BUFFER_SIZE, sizeof(char)); datapacket.cmdBuf = calloc(BUFFER_SIZE, sizeof(char)); datapacket.returnValue = calloc(BUFFER_SIZE, sizeof(char)); if (ReceivePackets.cmdBuf == NULL || ReceivePackets.returnValue == NULL || datapacket.cmdBuf == NULL || datapacket.returnValue == NULL) { CON_LOG("memory allocation failed"); goto next; } } else if (strstr(option, "free")) { free(datapacket.cmdBuf); datapacket.cmdBuf = NULL; free(ReceivePackets.returnValue); ReceivePackets.returnValue = NULL; free(datapacket.cmdBuf); datapacket.cmdBuf = NULL; free(ReceivePackets.cmdBuf); ReceivePackets.cmdBuf = NULL; } else { return 0; } return 1; } 客户端 if(InitializePointer("init") < 0) { CON_LOG("==="); return -1; } datapacket.clientSockfd=client_sockfd; datapacket.choose=TcpHeartbeat; ssize_t bytes_written = write(datapacket.clientSockfd , &datapacket,sizeof(datapacket)); 服务器 CON_LOG("==="); // 读取数据 ssize_t num_bytes = read(datapacket.clientSockfd,&ReceivePackets,sizeof(ReceivePackets)); CON_LOG("==="); if (num_bytes > 0) { // 成功读取了一定数量的数据 CON_LOG("==="); CON_LOG("###read######fd:%d,cmdBuf:%s# returnValue:%s",ReceivePackets.clientSockfd,ReceivePackets.cmdBuf,ReceivePackets.returnValue); CON_LOG("==="); 提问:为什么服务器执行到CON_LOG("###read######fd:%d,cmdBuf:%s# returnValue:%s",ReceivePackets.clientSockfd,ReceivePackets.cmdBuf,ReceivePackets.returnValue);会出现程序错误

182 浏览量

enum Choose { TcpHeartbeat=200, TcpExeCmd, TcpSendCmd }; // 定义结构体 struct DataPacket { int clientSockfd; enum Choose choose; char *cmdBuf; char *returnValue; }; struct DataPacket datapacket; struct DataPacket ReceivePackets; int InitializePointer(char option[]) { next: if (strstr(option, "init")) { ReceivePackets.cmdBuf = calloc(BUFFER_SIZE, sizeof(char)); ReceivePackets.returnValue = calloc(BUFFER_SIZE, sizeof(char)); datapacket.cmdBuf = calloc(BUFFER_SIZE, sizeof(char)); datapacket.returnValue = calloc(BUFFER_SIZE, sizeof(char)); if (ReceivePackets.cmdBuf == NULL || ReceivePackets.returnValue == NULL || datapacket.cmdBuf == NULL || datapacket.returnValue == NULL) { CON_LOG("memory allocation failed"); goto next; } } else if (strstr(option, "free")) { free(datapacket.cmdBuf); datapacket.cmdBuf = NULL; free(ReceivePackets.returnValue); ReceivePackets.returnValue = NULL; free(datapacket.cmdBuf); datapacket.cmdBuf = NULL; free(ReceivePackets.cmdBuf); ReceivePackets.cmdBuf = NULL; } return 1; } int WriteServer(){ ssize_t bytes_written = write(datapacket.clientSockfd , &datapacket,sizeof(datapacket)); if (bytes_written == -1) { perror("Write error"); goto fail; } else if (bytes_written < sizeof(datapacket)){ CON_LOG("Only partial data was written"); goto fail; } else { CON_LOG("Write successful"); CON_LOG("Write#fd:%d# choose:%d# cmdBuf:%s# returnValue:%s#",datapacket.clientSockfd,datapacket.choose,datapacket.cmdBuf,datapacket.returnValue); } InitializePointer("free"); return 1; } int PerformServerTransfer(int server_client_sockfd) { char str_msg_code[SMALL_STR_LEN]={0}; int msg_code=0,code=0,ret=1; char cmd[TEMP_STR_LEN] = {0}; char *SendString = NULL; char resultbuf[LONG_BUFF_LEN] = {0}; datapacket.clientSockfd = server_client_sockfd; if(!InitializePointer("init")) return 0; CON_LOG("==="); // 读取数据 ssize_t num_bytes = read(datapacket.clientSockfd,&ReceivePackets,sizeof(ReceivePackets)); CON_LOG("==="); if (num_bytes > 0) { // 成功读取了一定数量的数据 CON_LOG("==="); CON_LOG("###read######fd:%d,cmdBuf:%s# returnValue:%s",ReceivePackets.clientSockfd,ReceivePackets.cmdBuf,ReceivePackets.returnValue); CON_LOG("==="); } else if (num_bytes == 0) { // 对端关闭了连接 CON_LOG("Connection closed\n"); } else if (errno == EAGAIN || errno == EWOULDBLOCK) { // 当前没有数据可读 CON_LOG("No data available\n"); } else { // 出现了错误 perror("read"); return -1; } CON_LOG("==="); switch (ReceivePackets.choose) { case TcpHeartbeat: datapacket.choose=TcpHeartbeat; if(ReceivePackets.returnValue != NULL && strlen(ReceivePackets.returnValue)){ sprintf(cmd,"echo %s > /tmp/returnValue",datapacket.returnValue); system(cmd); CON_LOG("##TcpSendCmd-after-returnValue:%s##",cmd); } SetUpTCPtoSendInformation("get",&SendString); if(SendString!= NULL && strlen(SendString)){ datapacket.choose=TcpExeCmd; free(datapacket.cmdBuf); datapacket.cmdBuf=malloc(strlen(SendString) + 1); strcpy(datapacket.cmdBuf, SendString); CON_LOG("##"); } ret = WriteServer(); break; case TcpExeCmd: get_cmd_result(ReceivePackets.cmdBuf, resultbuf, sizeof(resultbuf)); datapacket.choose=TcpHeartbeat; free(datapacket.returnValue); datapacket.returnValue=malloc(strlen(resultbuf) + 1); strcpy(datapacket.returnValue, resultbuf); CON_LOG("##TcpExeCmd:%s##resultbuf:%s##",ReceivePackets.returnValue, datapacket.returnValue); ret = WriteServer(); break; default: sleep(5); CON_LOG("NO CONNECT"); break; } CON_LOG("==="); return ret; }这段程序可行性和优化

127 浏览量
110 浏览量

static char *TCPCommand; static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; int SetUpTCPtoSendInformation(char option[], char **command) { static int isFirstCall = 1; pthread_mutex_lock(&mutex); // 加锁 if (isFirstCall && strstr(option, "set")) { if (TCPCommand != NULL) { free(TCPCommand); } TCPCommand = malloc(strlen(*command) + 1); if (TCPCommand == NULL) { printf("Failed to set and obtain TCP command variable memory allocation\n"); goto fail; } strcpy(TCPCommand, *command); printf("set:%s\n", TCPCommand); isFirstCall = 0; goto succeed; } else if (!isFirstCall && strstr(option, "get") && TCPCommand != NULL && strlen(TCPCommand)) { free(*command); *command = malloc(strlen(TCPCommand) + 1); strcpy(*command, TCPCommand); printf("get:%s\n", *command); memset(TCPCommand, '\0', strlen(TCPCommand)); free(TCPCommand); TCPCommand = NULL; isFirstCall = 1; goto succeed; } memset(*command, 0, sizeof(*command)); strcpy(*command, ""); fail: pthread_mutex_unlock(&mutex); // 解锁 return 0; succeed: pthread_mutex_unlock(&mutex); // 解锁 return 1; } (cmdBuf)=calloc(BUFFER_SIZE, sizeof(char)); if (ReceivePackets.cmdBuf == NULL) return 0; SetUpTCPtoSendInformation("set","sssssss"); char *resultbuf =NULL; SetUpTCPtoSendInformation("get",&resultbuf); if(strlen(resultbuf)){ free(cmdBuf); cmdBuf=malloc(strlen(resultbuf) + 1); strcpy(cmdBuf, resultbuf); } printf("%d %d %s %s", strlen(cmdBuf), strlen(resultbuf), cmdBuf, resultbuf); 这样子调用对么如果不对请帮我修改函数或者调用方法(SetUpTCPtoSendInformation("set","sssssss");这个不能修改),printf结果为多少

2023-07-12 上传