Re: How can I find the definition of a structure with cscope

Baroudi Safwen <baroudi.safwene@gmail.com> wrote:

> Le mardi 29 avril 2008 07:21:43 UTC+2, wiseker a écrit :
>> In vim + cscope, we can use command ":cs find g name" to find the definition of a function or structure. But there are some problems for structures.
>>
>> For example, when we want to find the definition of struct device in linux kernel tree,the result is:
>> # line filename / context / line
>> 1 115 Documentation/lguest/lguest.c <<device>>
>> struct device
>> 2 32 Documentation/spi/spidev_test.c <<device>>
>> static const char *device = "/dev/spidev1.1";
>> 3 117 arch/x86/kernel/early-quirks.c <<device>>
>> u32 device;
>> 4 48 arch/x86/kernel/reboot_fixups_32.c <<device>>
>> unsigned int device;
>> 5 46 arch/x86/pci/irq.c <<device>>
>> u16 vendor, device;
>> 6 53 arch/x86/pci/irq.c <<device>>
>> int (*probe)(struct irq_router *r, struct pci_dev *router, u16 device);\
>> ......
>>
>> That is because: 1) there are lots of "struct device" in header files (to avoid including headers); 2) Some locale variables with same name exists.
>>
>> How can we avoid this and find the right definition quickly?
>>
>> Thanks!
>
> I wrote a patch for vim that will sort the matches returned by cscope to put the matches that end with '{' at the top. I work on the kernel and boy this was useful. I'll be happy to share the patch if anyone is interested.

cscope and ctags use heuristics which cannot tell for sure what is the
correct definition.

Instead of those tools, you can use rtags and/or YouCompleteMe which
are based on
the clang library. Those tools understand c or c++ and can jump to the correct
definition.

See:

https://github.com/Valloric/YouCompleteMe

https://github.com/Andersbakken/rtags
https://github.com/lyuts/vim-rtags

Regards
Dominique

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