How can I find the definition of a structure with cscope

[wiseker]

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!

[Gary Johnson]

If you want to limit the scope of the search to just those files
included by the current source file, you may find what you're
looking for in

:help include-search

HTH,
Gary

[Jason Lau]

        Thanks!
 

HTH,
Gary

[Mark Wilden]

Unfortunately, I think the desire is actually the opposite - to search includes that -aren't- included in the current file. The current file includes a line like

struct foo;

and what's needed is to find the file that has

struct foo {

   // foo's definition

};

///ark

[Baroudi Safwen]

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.

[Dominique Pellé]

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