mmozeiko

//

struct TerminalCell
{
    // cell index into GlyphTexture, should be two 16-bit (x,y) values packed: "x | (y << 16)"
    uint GlyphIndex;

    // 0xAABBGGRR encoded colors, nonzero alpha for Foreground indicates to render colored-glyph
    // which means use RGB values from GlyphTexture directly as output, not as  ClearType blending weights
    uint Foreground;

gcatlin

//
// cc sdl-metal-example.m `sdl2-config --cflags --libs` -framework Metal -framework QuartzCore && ./a.out
//
#include <SDL.h>
#import <Metal/Metal.h>
#import <QuartzCore/CAMetalLayer.h>

int main (int argc, char *args[])
{
    SDL_SetHint(SDL_HINT_RENDER_DRIVER, "metal");

fay59

Here's a list of mildly interesting things about the C language that I learned mostly by consuming Clang's ASTs. Although surprises are getting sparser, I might continue to update this document over time.

There are many more mildly interesting features of C++, but the language is literally known for being weird, whereas C is usually considered smaller and simpler, so this is (almost) only about C.

1. Combined type and variable/field declaration, inside a struct scope [https://godbolt.org/g/Rh94Go]

struct foo {
   struct bar {
 int x;

bishboria

These links no longer work. Springer have pulled the free plug.

Graduate texts in mathematics

duplicates = multiple editions

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

niw

/*
 * A simple libpng example program
 * http://zarb.org/~gc/html/libpng.html
 *
 * Modified by Yoshimasa Niwa to make it much simpler
 * and support all defined color_type.
 *
 * To build, use the next instruction on OS X.
 * $ brew install libpng
 * $ clang -lz -lpng16 libpng_test.c

ssylvan

// Class for non-nullable pointers
template<class T>
class ptr
{
private:
	T* m_ptr;
	ptr(nullptr_t); // avoids init with nullptr
	ptr(int);	// avoids init with 0 or NULL	
public:
	explicit ptr(T* ptr) throw() : m_ptr(ptr) { assert(ptr != nullptr); };

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

linusthe3rd

/*
 * Function that handles the drawing of a circle using the triangle fan
 * method. This will create a filled circle.
 *
 * Params:
 *	x (GLFloat) - the x position of the center point of the circle
 *	y (GLFloat) - the y position of the center point of the circle
 *	radius (GLFloat) - the radius that the painted circle will have
 */
void drawFilledCircle(GLfloat x, GLfloat y, GLfloat radius){