finding the name of the function

[GVK]

Hi,
I've written a piece of network code in C. I'm pritting lots of
debugging information, just in case the program is screwed :) Is there
any built-in function that gives the name of the function from which it
is called? For example,

int foo()
{
print_function_name(); /* some built-in system call */
}

should output the name as "foo()" or somewhat similarly. I've been
coding in C for almost 2 and half years but never used such a function
till now. Any help is appreciated.

regards,
GVK
--
Happy Hacking!!!

[Christopher Benson-Manica]

GVK <va******@students.iiit.net> spoke thus:

I've written a piece of network code in C. I'm pritting lots of
debugging information, just in case the program is screwed :) Is there
any built-in function that gives the name of the function from which it
is called? For example,

There is no standard one AFAIK, but __FILE__ and __LINE__ can provide
a decent approximation.

--
Christopher Benson-Manica | I *should* know what I'm talking about - if I
ataru(at)cyberspace.org | don't, I need to know. Flames welcome.

[Ben Pfaff]

GVK <va******@students.iiit.net> writes:

I've written a piece of network code in C. I'm pritting lots
of debugging information, just in case the program is screwed :) Is
there any built-in function that gives the name of the function from
which it is called? For example,

C99 offers the __func__ predefined identifier. GCC offers the
nonstandard __FUNCTION__.
--
"What is appropriate for the master is not appropriate for the novice.
You must understand the Tao before transcending structure."
--The Tao of Programming

[Jeremy Yallop]

GVK wrote:

I've written a piece of network code in C. I'm pritting lots of
debugging information, just in case the program is screwed :) Is there
any built-in function that gives the name of the function from which it
is called?

There's no way to do that in C89, but C99 defines __func__, an array
containing the name of the current function:

int foo()
{
puts(__func__);
}

Some compilers provide extensions to do the same thing; for example,
GCC has __FUNCTION__ and __PRETTY_FUNCTION__, which are similar to
__func__.

(I'd like to propose this as an additional FAQ.)

Jeremy.

[GVK]

> GVK wrote:

I've written a piece of network code in C. I'm pritting lots of
debugging information, just in case the program is screwed :) Is there
any built-in function that gives the name of the function from which it
is called?

Thanks a lot to all the guys who took time to read my doubt. I got it
working and thanks again to all the gurus who replied. __FUNCTION__ works.

GVK

--
Happy Hacking!!!

[those who know me have no need of my name]

in comp.lang.c i read:

GVK <va******@students.iiit.net> writes:

I've written a piece of network code in C. I'm pritting lots
of debugging information, just in case the program is screwed :) Is
there any built-in function that gives the name of the function from
which it is called? For example,

C99 offers the __func__ predefined identifier. GCC offers the
nonstandard __FUNCTION__.

recent versions of most compilers that had something non-standard also now
provide the newer, standard identifier, including gcc.

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