cscope：如何使用cscope通过命令行搜索符号？ [英] cscope: How to use cscope to search for a symbol using command line?

问题描述

我在网上找到的所有cscope教程都讨论了如何使用cscope的交互模式在vim和emacs等编辑器中搜索符号。但是我认为应该可以在终端中发出命令来执行

All the cscope tutorials I found online talk about how to use the interactive mode of cscope to search for symbols in editors such as vim and emacs. But I think it should be possible to issue a command in terminal to do something like

cscope -d -some_options <my symbol>

我应该能够在stdout中看到结果列表，而不必输入ncurse UI并在那里执行所有操作。我认为这是可能的，因为唯一的前端浏览器可以在其TclTK UI中执行类似的操作。但是不幸的是代码没有超出我的范围。

And I should be able to see a list of results in stdout, instead of having to enter the ncurse UI and do everything there. I think this is possible because the "only" frontend cbrowser can do things like that in its TclTK UI. But the code unfortunately is quite beyond me.

但是，我没有找到有关此功能的文档。

However, I found no documentation about this capability.

Am我在做梦还是有没有记录的方法？

Am I dreaming or is there an undocumented way of doing this?

谢谢！

更新

一些进步：如果我做一个小项目，其中包含一些具有子目录结构的文件。然后rici的答案就可以使用。具有更大的项目（成千上万个具有复杂文件夹结构的文件）。即使在项目文件夹（也是我当前的工作目录）的根目录下有一个cscope.out和cscope.files，从相同的命令和相同的符号中也看不到任何东西。我怀疑该命令存在可伸缩性问题。我还尝试了命令

Some progress: If I make a small project of a few files with sub-dir structure. Then rici's answer works out of the box. With a bigger project (thousands of files with complex folder structure). Even with a cscope.out and cscope.files present at the root of the project folder (also my current working directory), I got nothing from the same command and same symbol. I suspect that there is a scalability issue with the command. I also tried command

cat cscope.files | xargs cscope -d -L1 <symbol> -i

无济于事。

更新

非常奇怪！我尝试使用其他一些符号。原来，我正在搜索的特定符号无法使用命令行显示。但是我尝试过的所有其他符号都起作用。而且cbrowser毫无问题地找到该失败符号。无论如何，我只是运气不好。我将在命令行中针对此异常询问一个单独的问题。

Extremely bizarre! I tried to use some other symbols. Turned out that the particular symbol I was searching for cannot be shown using the command line. But all other symbols I tried worked. And cbrowser has no problem finding that "failed" symbol. Anyways, I was just in bad luck. I'll ask a separate question about this anomaly in command line.

我将rici的答案标记为正确。

I marked rici's answer as correct.

推荐答案

您可以调用 -R 版本的cscope进行递归搜索。例如：

You can call cscope with the -R version for recursive searching. For example:

cscope -d -f/path/to/cscope.out -R -L1 some_symbol

（搜索some_symbol的定义）

(searches for the definition of some_symbol)

cscope -d -f/path/to/cscope.out -R -L3 some_symbol

（显示所有调用some_symbol的位置）

(shows all locations where some_symbol is called)

如果使用cscope，则可以省略 -f 选项。 out位于当前工作目录中。

You can omit the -f option if cscope.out is located in the current working directory.

请注意，如果 -R 被省略。较旧的cscope版本不支持 -R 。例如，版本15.8a确实支持它。

Note that the above call yield zero results for an indexed symbol if -R is omitted. Very old cscope versions don't support -R. For example, version 15.8a does support it.

-L 的可能值列表为：

0: Find this C symbol
1: Find this definition
2: Find functions called by this function
3: Find functions calling this function
4: Find this text string
6: Find this egrep pattern
7: Find this file
8: Find files #including this file
9: Find places where this symbol is assigned a value

The <$ c $创建 cscope.out 文件时，也可以使用c> -R 选项，例如：

The -R option can also be used when creating the cscope.out file, e.g.:

cscope -bR

这篇关于cscope：如何使用cscope通过命令行搜索符号？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！