bnnm

// Decompresses LZ4 found in XNB (just a test tool for vgmstream).

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>

/* Decompresses LZ4 from MonoGame. The original C lib has a lot of modes and configs, but
 * MonoGame only uses the core 'block' part, which is a fairly simple LZ77 (has one command
 * to copy literal and window values, with variable copy lengths).

billti

Below are the steps to get an ARM64 version of Ubuntu running in the QEMU emulator on Windows 10.

Install QEMU

Install for Windows from https://qemu.weilnetz.de/w64/ (I used qemu-w64-setup-20181211.exe)

Put C:\Program Files\qemu on your PATH, and run the below to check it's working (which will list out the CPUs the AArch64 emulator can emulate):

qemu-system-aarch64 -M virt -cpu help

incrediblejr

/* clang-format off */
/*
ijss : IncredibleJunior SparseSet

sparse set [1] for bookkeeping of dense<->sparse index mapping or
a building block for a simple LIFO index/handle allocator

[1] https://research.swtch.com/sparse
*/

cellularmitosis

Jason Pepas' Technical Blog

Resume

Best of:

• rocketcal.cc, a Factorio space platform blueprint optimizer
• leopard.sh, a package manager for PowerPC Macs, written in Bash
• A Lisp interpreter in C: 1, 2, 3, 4, 5, 6, 7, 8, [9](https://gist.github.com/cellularmitosis

nbouteme

#version 300 es
precision highp float;

in vec2 UV;
out vec4 out_color;
uniform float ratio, time;
uniform sampler2D texture0;

const float PI_3 = 1.0471975512;

fnky

ANSI Escape Sequences

Standard escape codes are prefixed with Escape:

• Ctrl-Key: ^[
• Octal: \033
• Unicode: \u001b
• Hexadecimal: \x1B
• Decimal: 27

pervognsen

typedef struct intern_t {
    intern_t *next;
    uint32_t length; // can be narrower if you want to limit internable string length, which is a good idea.
    char str[1];
} intern_t;

hashtable_t string_table;

const char *string_intern(const char *str, uint32_t length) {
    uint64_t key = string_hash(str, length);

idbrii

An inline image version of Matt Walker's translation of CEDEC 2017 talks by Nintendo. (I've added italic content.)

Covers four talks:

• Field Level Design in "The Legend of Zelda: Breath of the Wild" ~ Hydral Earth Created
• The Aim of BotW’s UI — Immersive, Impressionable UI
• The Open Air Sound Playing a Massive, Breathing World
• BotW Project Management — Seamless from Prototype to Final Product!

Field Level Design in "The Legend of Zelda: Breath of the Wild" ~ Hydral Earth Created

pervognsen

I've been trying to get clarity on to what extent the position-independent data structure tricks in Gob (https://gist.github.com/pervognsen/c25a039fcf8c256141ef0778a1b32a88) are legal or illegal according to the C standard. I always had the impression it would run afoul of strict aliasing or pointer casting restrictions, but I've been digging into the standard, and now I'm no longer so sure. It might be perfectly legal after all?

Here's section 6.3.2.3 on pointer conversions from the C99 draft standard. I'll be referencing the C99 standard throughout this article, but I've verified that the C11 standard hasn't changed in the relevant areas.

"5 An integer may be converted to any pointer type. Except as previously specified, the result is implementation-defined, might not be correctly aligned, might not point to an entity of the referenced type, and might be a trap representation. [56]

6 Any pointer type may be converted to an integer type. Except as previously specified, the result is implementation-defined

pervognsen

typedef struct {
    char *address;
    char *reference;
} label_t;

void emit_label_reference(label_t *label) {
    if (label->address) {
        emit4(label->address - emit_pointer);
    } else {
        char *reference = emit_pointer;