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Re: Need info about the internals of printf

From: Florian Weimer <fweimer at redhat dot com>
To: Eswar Chandra Tadikonda <teswarsrinivas at gmail dot com>
Cc: libc-help at sourceware dot org
Date: Mon, 17 Jun 2019 20:37:23 +0200
Subject: Re: Need info about the internals of printf
References: <CAAeyWSZE+66ivAv+sAxY8xNay2yRxZD3XTT-MJuFQWpR9iSqGA@mail.gmail.com>

* Eswar Chandra Tadikonda:

> I actually got stuck at __vfprintf_internal function which i am not able to
> find the definition through tags.

Tags browsers generally do not work with the glibc sources due to heavy
use of the preprocessor, unfortunately.

stdio-common/vfprintf-internal.c has the implementation, and it contains
this:

#ifndef COMPILE_WPRINTF
# define vfprintf       __vfprintf_internal

So its vfprintf function is actually __vfprintf_internal.

> BTW, is this the actual function called internally by printf ?

Yes, calls eventually end up there.

Thanks,
Florian

References:
- Need info about the internals of printf
  - From: Eswar Chandra Tadikonda

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