Notices tagged with c

Vulnerabilidad grave en GNU C Library (glibc) de 24 años de antigüedad afecta PHP
https://blog.segu-info.com.ar/2024/04/vulnerabilidad-grave-en-gnu-c-library.html #php #infosec #gnu #c

A raiz de un artículo de @atareao me surgio la duda : #Gtk o #Qt . He encontrado https://www.baeldung.com/linux/gui-toolkits-gtk-qt , bien explicado . Y en https://stackoverflow.com/questions/1887070/what-should-i-choose-gtk-or-qt lo orientan a según uses #c o #c++ . Como suele ocurrir, me surgen más dudas 🤔 . Entraría .NET en esta categoría ⁉️ Que otros GUI toolkits existen ❓ uff. 😶

For more information, consult your local encyclopedia:
https://en.wikipedia.org/wiki/Single-precision_floating-point_format

#programming #c #cpp

The question on my mind was: does this give the correct distance even around the boundary of an exponent bump?

And yes: mantissa and exponent are arranged in such a way that adding 1 to the binary form always yields the next float:

>>> import struct
>>> to_float = lambda i: unpack(">f", i.to_bytes(4))[0]
>>> to_float(0x3FFFFFFF)
1.9999998807907104
>>> to_float(0x40000000)
2.0
>>> to_float(0x40000001)
2.000000238418579

#programming #c #cpp #python

I came across a clever method for approximate float comparison which exploits their binary representation:

bool almost_equal(float a, float b) {
uint32_t abits = to_bits(a);
uint32_t bbits = to_bits(b);

return abits - bbits < 4;
}

Where 4 is the tolerance in "units in the last place".

to_bits() isn't a simple bit_cast. It also does some magic with the sign bit. But for now let's only consider positive floats...

#programming #c #cpp

hacking in mes https://twitch.tv/ekaitzza

#coding #c #compilers #scheme

Are you an experienced #Commodore #C64 hacker, with some experience in #C? Help the #FujiNet team debug the IEC firmware!

code: https://github.com/FujiNetWIFI/fujinet-platformio/tree/master/lib/bus/iec
discord: https://discord.gg/7MfFTvD

Me llego este libro, 3era Edicion #programming #programacion #c

If the C standard thinks "undefined argument even for inlining use is [undefined behavior]", then it's a case of that paperwork that doesn't reflect reality, and we'll treat it with the deference it deserves - is less than toilet paper.

We have decades of history of doing that in the kernel. Sometimes the standards are just wrong, sometimes they are just too far removed from reality to be relevant, and then it's just not worth worrying about them.
— Linus

https://lwn.net/Articles/906635/
#linux #c

Hi, I'm Juan 👋

I was looking for a Masto instance I could trust and I thought SDF (in operation since 1987) is the type of commitment I like 👍

(also have an account in SDF-EU, although I haven't used it much so far)

I've been hosting my own email and web since 2003, so what I'm looking for is more the community aspect of SDF/tildeverse.

I do retro-gamedev (ZX Spectrum, Amstrad CPC, MSX and Commodore 64), and other types of "dev" in #Scala, #Python, #C, #Z80, and #Go.

#introduction

@fribbledom I'll happily vote for the first given that #Nim complies to #C
All the benefits of C without the burden.

@fribbledom
Go #c go!